From aa97e4d4981d61808a558c5ab36be6d3bcc2c4f6 Mon Sep 17 00:00:00 2001 From: Dave Chapman Date: Wed, 16 Feb 2005 19:33:19 +0000 Subject: Initial import of libFLAC from flac-1.1.2.tar.gz git-svn-id: svn://svn.rockbox.org/rockbox/trunk@5983 a1c6a512-1295-4272-9138-f99709370657 --- apps/codecs/libFLAC/stream_encoder.c | 3394 ++++++++++++++++++++++++++++++++++ 1 file changed, 3394 insertions(+) create mode 100644 apps/codecs/libFLAC/stream_encoder.c (limited to 'apps/codecs/libFLAC/stream_encoder.c') diff --git a/apps/codecs/libFLAC/stream_encoder.c b/apps/codecs/libFLAC/stream_encoder.c new file mode 100644 index 0000000000..33debfc06a --- /dev/null +++ b/apps/codecs/libFLAC/stream_encoder.c @@ -0,0 +1,3394 @@ +/* libFLAC - Free Lossless Audio Codec library + * Copyright (C) 2000,2001,2002,2003,2004,2005 Josh Coalson + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * - Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * - Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * - Neither the name of the Xiph.org Foundation nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include +#include +#include /* for malloc() */ +#include /* for memcpy() */ +#include "FLAC/assert.h" +#include "FLAC/stream_decoder.h" +#include "protected/stream_encoder.h" +#include "private/bitbuffer.h" +#include "private/bitmath.h" +#include "private/crc.h" +#include "private/cpu.h" +#include "private/fixed.h" +#include "private/format.h" +#include "private/lpc.h" +#include "private/md5.h" +#include "private/memory.h" +#include "private/stream_encoder_framing.h" + +#ifdef HAVE_CONFIG_H +#include +#endif + +#ifdef min +#undef min +#endif +#define min(x,y) ((x)<(y)?(x):(y)) + +#ifdef max +#undef max +#endif +#define max(x,y) ((x)>(y)?(x):(y)) + +typedef struct { + FLAC__int32 *data[FLAC__MAX_CHANNELS]; + unsigned size; /* of each data[] in samples */ + unsigned tail; +} verify_input_fifo; + +typedef struct { + const FLAC__byte *data; + unsigned capacity; + unsigned bytes; +} verify_output; + +typedef enum { + ENCODER_IN_MAGIC = 0, + ENCODER_IN_METADATA = 1, + ENCODER_IN_AUDIO = 2 +} EncoderStateHint; + +/*********************************************************************** + * + * Private class method prototypes + * + ***********************************************************************/ + +static void set_defaults_(FLAC__StreamEncoder *encoder); +static void free_(FLAC__StreamEncoder *encoder); +static FLAC__bool resize_buffers_(FLAC__StreamEncoder *encoder, unsigned new_size); +static FLAC__bool write_bitbuffer_(FLAC__StreamEncoder *encoder, unsigned samples); +static FLAC__bool process_frame_(FLAC__StreamEncoder *encoder, FLAC__bool is_last_frame); +static FLAC__bool process_subframes_(FLAC__StreamEncoder *encoder, FLAC__bool is_last_frame); + +static FLAC__bool process_subframe_( + FLAC__StreamEncoder *encoder, + unsigned min_partition_order, + unsigned max_partition_order, + FLAC__bool precompute_partition_sums, + const FLAC__FrameHeader *frame_header, + unsigned subframe_bps, + const FLAC__int32 integer_signal[], +#ifndef FLAC__INTEGER_ONLY_LIBRARY + const FLAC__real real_signal[], +#endif + FLAC__Subframe *subframe[2], + FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents[2], + FLAC__int32 *residual[2], + unsigned *best_subframe, + unsigned *best_bits +); + +static FLAC__bool add_subframe_( + FLAC__StreamEncoder *encoder, + const FLAC__FrameHeader *frame_header, + unsigned subframe_bps, + const FLAC__Subframe *subframe, + FLAC__BitBuffer *frame +); + +static unsigned evaluate_constant_subframe_( + const FLAC__int32 signal, + unsigned subframe_bps, + FLAC__Subframe *subframe +); + +static unsigned evaluate_fixed_subframe_( + FLAC__StreamEncoder *encoder, + const FLAC__int32 signal[], + FLAC__int32 residual[], + FLAC__uint32 abs_residual[], + FLAC__uint64 abs_residual_partition_sums[], + unsigned raw_bits_per_partition[], + unsigned blocksize, + unsigned subframe_bps, + unsigned order, + unsigned rice_parameter, + unsigned min_partition_order, + unsigned max_partition_order, + FLAC__bool precompute_partition_sums, + FLAC__bool do_escape_coding, + unsigned rice_parameter_search_dist, + FLAC__Subframe *subframe, + FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents +); + +#ifndef FLAC__INTEGER_ONLY_LIBRARY +static unsigned evaluate_lpc_subframe_( + FLAC__StreamEncoder *encoder, + const FLAC__int32 signal[], + FLAC__int32 residual[], + FLAC__uint32 abs_residual[], + FLAC__uint64 abs_residual_partition_sums[], + unsigned raw_bits_per_partition[], + const FLAC__real lp_coeff[], + unsigned blocksize, + unsigned subframe_bps, + unsigned order, + unsigned qlp_coeff_precision, + unsigned rice_parameter, + unsigned min_partition_order, + unsigned max_partition_order, + FLAC__bool precompute_partition_sums, + FLAC__bool do_escape_coding, + unsigned rice_parameter_search_dist, + FLAC__Subframe *subframe, + FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents +); +#endif + +static unsigned evaluate_verbatim_subframe_( + const FLAC__int32 signal[], + unsigned blocksize, + unsigned subframe_bps, + FLAC__Subframe *subframe +); + +static unsigned find_best_partition_order_( + struct FLAC__StreamEncoderPrivate *private_, + const FLAC__int32 residual[], + FLAC__uint32 abs_residual[], + FLAC__uint64 abs_residual_partition_sums[], + unsigned raw_bits_per_partition[], + unsigned residual_samples, + unsigned predictor_order, + unsigned rice_parameter, + unsigned min_partition_order, + unsigned max_partition_order, + FLAC__bool precompute_partition_sums, + FLAC__bool do_escape_coding, + unsigned rice_parameter_search_dist, + FLAC__EntropyCodingMethod_PartitionedRice *best_partitioned_rice +); + +static void precompute_partition_info_sums_( + const FLAC__uint32 abs_residual[], + FLAC__uint64 abs_residual_partition_sums[], + unsigned residual_samples, + unsigned predictor_order, + unsigned min_partition_order, + unsigned max_partition_order +); + +static void precompute_partition_info_escapes_( + const FLAC__int32 residual[], + unsigned raw_bits_per_partition[], + unsigned residual_samples, + unsigned predictor_order, + unsigned min_partition_order, + unsigned max_partition_order +); + +#ifdef DONT_ESTIMATE_RICE_BITS +static FLAC__bool set_partitioned_rice_( + const FLAC__uint32 abs_residual[], + const FLAC__int32 residual[], + const unsigned residual_samples, + const unsigned predictor_order, + const unsigned suggested_rice_parameter, + const unsigned rice_parameter_search_dist, + const unsigned partition_order, + FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents, + unsigned *bits +); + +static FLAC__bool set_partitioned_rice_with_precompute_( + const FLAC__int32 residual[], + const FLAC__uint64 abs_residual_partition_sums[], + const unsigned raw_bits_per_partition[], + const unsigned residual_samples, + const unsigned predictor_order, + const unsigned suggested_rice_parameter, + const unsigned rice_parameter_search_dist, + const unsigned partition_order, + const FLAC__bool search_for_escapes, + FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents, + unsigned *bits +); +#else +static FLAC__bool set_partitioned_rice_( + const FLAC__uint32 abs_residual[], + const unsigned residual_samples, + const unsigned predictor_order, + const unsigned suggested_rice_parameter, + const unsigned rice_parameter_search_dist, + const unsigned partition_order, + FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents, + unsigned *bits +); + +static FLAC__bool set_partitioned_rice_with_precompute_( + const FLAC__uint32 abs_residual[], + const FLAC__uint64 abs_residual_partition_sums[], + const unsigned raw_bits_per_partition[], + const unsigned residual_samples, + const unsigned predictor_order, + const unsigned suggested_rice_parameter, + const unsigned rice_parameter_search_dist, + const unsigned partition_order, + const FLAC__bool search_for_escapes, + FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents, + unsigned *bits +); +#endif + +static unsigned get_wasted_bits_(FLAC__int32 signal[], unsigned samples); + +/* verify-related routines: */ +static void append_to_verify_fifo_( + verify_input_fifo *fifo, + const FLAC__int32 * const input[], + unsigned input_offset, + unsigned channels, + unsigned wide_samples +); + +static void append_to_verify_fifo_interleaved_( + verify_input_fifo *fifo, + const FLAC__int32 input[], + unsigned input_offset, + unsigned channels, + unsigned wide_samples +); + +static FLAC__StreamDecoderReadStatus verify_read_callback_( + const FLAC__StreamDecoder *decoder, + FLAC__byte buffer[], + unsigned *bytes, + void *client_data +); + +static FLAC__StreamDecoderWriteStatus verify_write_callback_( + const FLAC__StreamDecoder *decoder, + const FLAC__Frame *frame, + const FLAC__int32 * const buffer[], + void *client_data +); + +static void verify_metadata_callback_( + const FLAC__StreamDecoder *decoder, + const FLAC__StreamMetadata *metadata, + void *client_data +); + +static void verify_error_callback_( + const FLAC__StreamDecoder *decoder, + FLAC__StreamDecoderErrorStatus status, + void *client_data +); + + +/*********************************************************************** + * + * Private class data + * + ***********************************************************************/ + +typedef struct FLAC__StreamEncoderPrivate { + unsigned input_capacity; /* current size (in samples) of the signal and residual buffers */ + FLAC__int32 *integer_signal[FLAC__MAX_CHANNELS]; /* the integer version of the input signal */ + FLAC__int32 *integer_signal_mid_side[2]; /* the integer version of the mid-side input signal (stereo only) */ +#ifndef FLAC__INTEGER_ONLY_LIBRARY + FLAC__real *real_signal[FLAC__MAX_CHANNELS]; /* the floating-point version of the input signal */ + FLAC__real *real_signal_mid_side[2]; /* the floating-point version of the mid-side input signal (stereo only) */ +#endif + unsigned subframe_bps[FLAC__MAX_CHANNELS]; /* the effective bits per sample of the input signal (stream bps - wasted bits) */ + unsigned subframe_bps_mid_side[2]; /* the effective bits per sample of the mid-side input signal (stream bps - wasted bits + 0/1) */ + FLAC__int32 *residual_workspace[FLAC__MAX_CHANNELS][2]; /* each channel has a candidate and best workspace where the subframe residual signals will be stored */ + FLAC__int32 *residual_workspace_mid_side[2][2]; + FLAC__Subframe subframe_workspace[FLAC__MAX_CHANNELS][2]; + FLAC__Subframe subframe_workspace_mid_side[2][2]; + FLAC__Subframe *subframe_workspace_ptr[FLAC__MAX_CHANNELS][2]; + FLAC__Subframe *subframe_workspace_ptr_mid_side[2][2]; + FLAC__EntropyCodingMethod_PartitionedRiceContents partitioned_rice_contents_workspace[FLAC__MAX_CHANNELS][2]; + FLAC__EntropyCodingMethod_PartitionedRiceContents partitioned_rice_contents_workspace_mid_side[FLAC__MAX_CHANNELS][2]; + FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents_workspace_ptr[FLAC__MAX_CHANNELS][2]; + FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents_workspace_ptr_mid_side[FLAC__MAX_CHANNELS][2]; + unsigned best_subframe[FLAC__MAX_CHANNELS]; /* index into the above workspaces */ + unsigned best_subframe_mid_side[2]; + unsigned best_subframe_bits[FLAC__MAX_CHANNELS]; /* size in bits of the best subframe for each channel */ + unsigned best_subframe_bits_mid_side[2]; + FLAC__uint32 *abs_residual; /* workspace where abs(candidate residual) is stored */ + FLAC__uint64 *abs_residual_partition_sums; /* workspace where the sum of abs(candidate residual) for each partition is stored */ + unsigned *raw_bits_per_partition; /* workspace where the sum of silog2(candidate residual) for each partition is stored */ + FLAC__BitBuffer *frame; /* the current frame being worked on */ + unsigned loose_mid_side_stereo_frames; /* rounded number of frames the encoder will use before trying both independent and mid/side frames again */ + unsigned loose_mid_side_stereo_frame_count; /* number of frames using the current channel assignment */ + FLAC__ChannelAssignment last_channel_assignment; + FLAC__StreamMetadata metadata; + unsigned current_sample_number; + unsigned current_frame_number; + struct FLAC__MD5Context md5context; + FLAC__CPUInfo cpuinfo; +#ifndef FLAC__INTEGER_ONLY_LIBRARY + unsigned (*local_fixed_compute_best_predictor)(const FLAC__int32 data[], unsigned data_len, FLAC__float residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1]); +#else + unsigned (*local_fixed_compute_best_predictor)(const FLAC__int32 data[], unsigned data_len, FLAC__fixedpoint residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1]); +#endif +#ifndef FLAC__INTEGER_ONLY_LIBRARY + void (*local_lpc_compute_autocorrelation)(const FLAC__real data[], unsigned data_len, unsigned lag, FLAC__real autoc[]); + void (*local_lpc_compute_residual_from_qlp_coefficients)(const FLAC__int32 *data, unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 residual[]); + void (*local_lpc_compute_residual_from_qlp_coefficients_64bit)(const FLAC__int32 *data, unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 residual[]); + void (*local_lpc_compute_residual_from_qlp_coefficients_16bit)(const FLAC__int32 *data, unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 residual[]); +#endif + FLAC__bool use_wide_by_block; /* use slow 64-bit versions of some functions because of the block size */ + FLAC__bool use_wide_by_partition; /* use slow 64-bit versions of some functions because of the min partition order and blocksize */ + FLAC__bool use_wide_by_order; /* use slow 64-bit versions of some functions because of the lpc order */ + FLAC__bool precompute_partition_sums; /* our initial guess as to whether precomputing the partitions sums will be a speed improvement */ + FLAC__bool disable_constant_subframes; + FLAC__bool disable_fixed_subframes; + FLAC__bool disable_verbatim_subframes; + FLAC__StreamEncoderWriteCallback write_callback; + FLAC__StreamEncoderMetadataCallback metadata_callback; + void *client_data; + /* unaligned (original) pointers to allocated data */ + FLAC__int32 *integer_signal_unaligned[FLAC__MAX_CHANNELS]; + FLAC__int32 *integer_signal_mid_side_unaligned[2]; +#ifndef FLAC__INTEGER_ONLY_LIBRARY + FLAC__real *real_signal_unaligned[FLAC__MAX_CHANNELS]; + FLAC__real *real_signal_mid_side_unaligned[2]; +#endif + FLAC__int32 *residual_workspace_unaligned[FLAC__MAX_CHANNELS][2]; + FLAC__int32 *residual_workspace_mid_side_unaligned[2][2]; + FLAC__uint32 *abs_residual_unaligned; + FLAC__uint64 *abs_residual_partition_sums_unaligned; + unsigned *raw_bits_per_partition_unaligned; + /* + * These fields have been moved here from private function local + * declarations merely to save stack space during encoding. + */ +#ifndef FLAC__INTEGER_ONLY_LIBRARY + FLAC__real lp_coeff[FLAC__MAX_LPC_ORDER][FLAC__MAX_LPC_ORDER]; /* from process_subframe_() */ +#endif + FLAC__EntropyCodingMethod_PartitionedRiceContents partitioned_rice_contents_extra[2]; /* from find_best_partition_order_() */ + /* + * The data for the verify section + */ + struct { + FLAC__StreamDecoder *decoder; + EncoderStateHint state_hint; + FLAC__bool needs_magic_hack; + verify_input_fifo input_fifo; + verify_output output; + struct { + FLAC__uint64 absolute_sample; + unsigned frame_number; + unsigned channel; + unsigned sample; + FLAC__int32 expected; + FLAC__int32 got; + } error_stats; + } verify; + FLAC__bool is_being_deleted; /* if true, call to ..._finish() from ..._delete() will not call the callbacks */ +} FLAC__StreamEncoderPrivate; + +/*********************************************************************** + * + * Public static class data + * + ***********************************************************************/ + +FLAC_API const char * const FLAC__StreamEncoderStateString[] = { + "FLAC__STREAM_ENCODER_OK", + "FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR", + "FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA", + "FLAC__STREAM_ENCODER_INVALID_CALLBACK", + "FLAC__STREAM_ENCODER_INVALID_NUMBER_OF_CHANNELS", + "FLAC__STREAM_ENCODER_INVALID_BITS_PER_SAMPLE", + "FLAC__STREAM_ENCODER_INVALID_SAMPLE_RATE", + "FLAC__STREAM_ENCODER_INVALID_BLOCK_SIZE", + "FLAC__STREAM_ENCODER_INVALID_MAX_LPC_ORDER", + "FLAC__STREAM_ENCODER_INVALID_QLP_COEFF_PRECISION", + "FLAC__STREAM_ENCODER_MID_SIDE_CHANNELS_MISMATCH", + "FLAC__STREAM_ENCODER_MID_SIDE_SAMPLE_SIZE_MISMATCH", + "FLAC__STREAM_ENCODER_ILLEGAL_MID_SIDE_FORCE", + "FLAC__STREAM_ENCODER_BLOCK_SIZE_TOO_SMALL_FOR_LPC_ORDER", + "FLAC__STREAM_ENCODER_NOT_STREAMABLE", + "FLAC__STREAM_ENCODER_FRAMING_ERROR", + "FLAC__STREAM_ENCODER_INVALID_METADATA", + "FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_ENCODING", + "FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_WRITING", + "FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR", + "FLAC__STREAM_ENCODER_ALREADY_INITIALIZED", + "FLAC__STREAM_ENCODER_UNINITIALIZED" +}; + +FLAC_API const char * const FLAC__StreamEncoderWriteStatusString[] = { + "FLAC__STREAM_ENCODER_WRITE_STATUS_OK", + "FLAC__STREAM_ENCODER_WRITE_STATUS_FATAL_ERROR" +}; + +/*********************************************************************** + * + * Class constructor/destructor + * + */ +FLAC_API FLAC__StreamEncoder *FLAC__stream_encoder_new() +{ + FLAC__StreamEncoder *encoder; + unsigned i; + + FLAC__ASSERT(sizeof(int) >= 4); /* we want to die right away if this is not true */ + + encoder = (FLAC__StreamEncoder*)calloc(1, sizeof(FLAC__StreamEncoder)); + if(encoder == 0) { + return 0; + } + + encoder->protected_ = (FLAC__StreamEncoderProtected*)calloc(1, sizeof(FLAC__StreamEncoderProtected)); + if(encoder->protected_ == 0) { + free(encoder); + return 0; + } + + encoder->private_ = (FLAC__StreamEncoderPrivate*)calloc(1, sizeof(FLAC__StreamEncoderPrivate)); + if(encoder->private_ == 0) { + free(encoder->protected_); + free(encoder); + return 0; + } + + encoder->private_->frame = FLAC__bitbuffer_new(); + if(encoder->private_->frame == 0) { + free(encoder->private_); + free(encoder->protected_); + free(encoder); + return 0; + } + + set_defaults_(encoder); + + encoder->private_->is_being_deleted = false; + + for(i = 0; i < FLAC__MAX_CHANNELS; i++) { + encoder->private_->subframe_workspace_ptr[i][0] = &encoder->private_->subframe_workspace[i][0]; + encoder->private_->subframe_workspace_ptr[i][1] = &encoder->private_->subframe_workspace[i][1]; + } + for(i = 0; i < 2; i++) { + encoder->private_->subframe_workspace_ptr_mid_side[i][0] = &encoder->private_->subframe_workspace_mid_side[i][0]; + encoder->private_->subframe_workspace_ptr_mid_side[i][1] = &encoder->private_->subframe_workspace_mid_side[i][1]; + } + for(i = 0; i < FLAC__MAX_CHANNELS; i++) { + encoder->private_->partitioned_rice_contents_workspace_ptr[i][0] = &encoder->private_->partitioned_rice_contents_workspace[i][0]; + encoder->private_->partitioned_rice_contents_workspace_ptr[i][1] = &encoder->private_->partitioned_rice_contents_workspace[i][1]; + } + for(i = 0; i < 2; i++) { + encoder->private_->partitioned_rice_contents_workspace_ptr_mid_side[i][0] = &encoder->private_->partitioned_rice_contents_workspace_mid_side[i][0]; + encoder->private_->partitioned_rice_contents_workspace_ptr_mid_side[i][1] = &encoder->private_->partitioned_rice_contents_workspace_mid_side[i][1]; + } + + for(i = 0; i < FLAC__MAX_CHANNELS; i++) { + FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&encoder->private_->partitioned_rice_contents_workspace[i][0]); + FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&encoder->private_->partitioned_rice_contents_workspace[i][1]); + } + for(i = 0; i < 2; i++) { + FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&encoder->private_->partitioned_rice_contents_workspace_mid_side[i][0]); + FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&encoder->private_->partitioned_rice_contents_workspace_mid_side[i][1]); + } + for(i = 0; i < 2; i++) + FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&encoder->private_->partitioned_rice_contents_extra[i]); + + encoder->protected_->state = FLAC__STREAM_ENCODER_UNINITIALIZED; + + return encoder; +} + +FLAC_API void FLAC__stream_encoder_delete(FLAC__StreamEncoder *encoder) +{ + unsigned i; + + FLAC__ASSERT(0 != encoder); + FLAC__ASSERT(0 != encoder->protected_); + FLAC__ASSERT(0 != encoder->private_); + FLAC__ASSERT(0 != encoder->private_->frame); + + encoder->private_->is_being_deleted = true; + + FLAC__stream_encoder_finish(encoder); + + if(0 != encoder->private_->verify.decoder) + FLAC__stream_decoder_delete(encoder->private_->verify.decoder); + + for(i = 0; i < FLAC__MAX_CHANNELS; i++) { + FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&encoder->private_->partitioned_rice_contents_workspace[i][0]); + FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&encoder->private_->partitioned_rice_contents_workspace[i][1]); + } + for(i = 0; i < 2; i++) { + FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&encoder->private_->partitioned_rice_contents_workspace_mid_side[i][0]); + FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&encoder->private_->partitioned_rice_contents_workspace_mid_side[i][1]); + } + for(i = 0; i < 2; i++) + FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&encoder->private_->partitioned_rice_contents_extra[i]); + + FLAC__bitbuffer_delete(encoder->private_->frame); + free(encoder->private_); + free(encoder->protected_); + free(encoder); +} + +/*********************************************************************** + * + * Public class methods + * + ***********************************************************************/ + +FLAC_API FLAC__StreamEncoderState FLAC__stream_encoder_init(FLAC__StreamEncoder *encoder) +{ + unsigned i; + FLAC__bool metadata_has_seektable, metadata_has_vorbis_comment; + + FLAC__ASSERT(0 != encoder); + + if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) + return encoder->protected_->state = FLAC__STREAM_ENCODER_ALREADY_INITIALIZED; + + encoder->protected_->state = FLAC__STREAM_ENCODER_OK; + + if(0 == encoder->private_->write_callback || 0 == encoder->private_->metadata_callback) + return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_CALLBACK; + + if(encoder->protected_->channels == 0 || encoder->protected_->channels > FLAC__MAX_CHANNELS) + return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_NUMBER_OF_CHANNELS; + + if(encoder->protected_->do_mid_side_stereo && encoder->protected_->channels != 2) + return encoder->protected_->state = FLAC__STREAM_ENCODER_MID_SIDE_CHANNELS_MISMATCH; + + if(encoder->protected_->loose_mid_side_stereo && !encoder->protected_->do_mid_side_stereo) + return encoder->protected_->state = FLAC__STREAM_ENCODER_ILLEGAL_MID_SIDE_FORCE; + + if(encoder->protected_->bits_per_sample >= 32) + encoder->protected_->do_mid_side_stereo = false; /* since we do 32-bit math, the side channel would have 33 bps and overflow */ + + if(encoder->protected_->bits_per_sample < FLAC__MIN_BITS_PER_SAMPLE || encoder->protected_->bits_per_sample > FLAC__REFERENCE_CODEC_MAX_BITS_PER_SAMPLE) + return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_BITS_PER_SAMPLE; + + if(!FLAC__format_sample_rate_is_valid(encoder->protected_->sample_rate)) + return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_SAMPLE_RATE; + + if(encoder->protected_->blocksize < FLAC__MIN_BLOCK_SIZE || encoder->protected_->blocksize > FLAC__MAX_BLOCK_SIZE) + return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_BLOCK_SIZE; + + if(encoder->protected_->max_lpc_order > FLAC__MAX_LPC_ORDER) + return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_MAX_LPC_ORDER; + + if(encoder->protected_->blocksize < encoder->protected_->max_lpc_order) + return encoder->protected_->state = FLAC__STREAM_ENCODER_BLOCK_SIZE_TOO_SMALL_FOR_LPC_ORDER; + + if(encoder->protected_->qlp_coeff_precision == 0) { + if(encoder->protected_->bits_per_sample < 16) { + /* @@@ need some data about how to set this here w.r.t. blocksize and sample rate */ + /* @@@ until then we'll make a guess */ + encoder->protected_->qlp_coeff_precision = max(FLAC__MIN_QLP_COEFF_PRECISION, 2 + encoder->protected_->bits_per_sample / 2); + } + else if(encoder->protected_->bits_per_sample == 16) { + if(encoder->protected_->blocksize <= 192) + encoder->protected_->qlp_coeff_precision = 7; + else if(encoder->protected_->blocksize <= 384) + encoder->protected_->qlp_coeff_precision = 8; + else if(encoder->protected_->blocksize <= 576) + encoder->protected_->qlp_coeff_precision = 9; + else if(encoder->protected_->blocksize <= 1152) + encoder->protected_->qlp_coeff_precision = 10; + else if(encoder->protected_->blocksize <= 2304) + encoder->protected_->qlp_coeff_precision = 11; + else if(encoder->protected_->blocksize <= 4608) + encoder->protected_->qlp_coeff_precision = 12; + else + encoder->protected_->qlp_coeff_precision = 13; + } + else { + if(encoder->protected_->blocksize <= 384) + encoder->protected_->qlp_coeff_precision = FLAC__MAX_QLP_COEFF_PRECISION-2; + else if(encoder->protected_->blocksize <= 1152) + encoder->protected_->qlp_coeff_precision = FLAC__MAX_QLP_COEFF_PRECISION-1; + else + encoder->protected_->qlp_coeff_precision = FLAC__MAX_QLP_COEFF_PRECISION; + } + FLAC__ASSERT(encoder->protected_->qlp_coeff_precision <= FLAC__MAX_QLP_COEFF_PRECISION); + } + else if(encoder->protected_->qlp_coeff_precision < FLAC__MIN_QLP_COEFF_PRECISION || encoder->protected_->qlp_coeff_precision > FLAC__MAX_QLP_COEFF_PRECISION) + return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_QLP_COEFF_PRECISION; + + if(encoder->protected_->streamable_subset) { + if( + encoder->protected_->blocksize != 192 && + encoder->protected_->blocksize != 576 && + encoder->protected_->blocksize != 1152 && + encoder->protected_->blocksize != 2304 && + encoder->protected_->blocksize != 4608 && + encoder->protected_->blocksize != 256 && + encoder->protected_->blocksize != 512 && + encoder->protected_->blocksize != 1024 && + encoder->protected_->blocksize != 2048 && + encoder->protected_->blocksize != 4096 && + encoder->protected_->blocksize != 8192 && + encoder->protected_->blocksize != 16384 + ) + return encoder->protected_->state = FLAC__STREAM_ENCODER_NOT_STREAMABLE; + if( + encoder->protected_->sample_rate != 8000 && + encoder->protected_->sample_rate != 16000 && + encoder->protected_->sample_rate != 22050 && + encoder->protected_->sample_rate != 24000 && + encoder->protected_->sample_rate != 32000 && + encoder->protected_->sample_rate != 44100 && + encoder->protected_->sample_rate != 48000 && + encoder->protected_->sample_rate != 96000 + ) + return encoder->protected_->state = FLAC__STREAM_ENCODER_NOT_STREAMABLE; + if( + encoder->protected_->bits_per_sample != 8 && + encoder->protected_->bits_per_sample != 12 && + encoder->protected_->bits_per_sample != 16 && + encoder->protected_->bits_per_sample != 20 && + encoder->protected_->bits_per_sample != 24 + ) + return encoder->protected_->state = FLAC__STREAM_ENCODER_NOT_STREAMABLE; + if(encoder->protected_->max_residual_partition_order > FLAC__SUBSET_MAX_RICE_PARTITION_ORDER) + return encoder->protected_->state = FLAC__STREAM_ENCODER_NOT_STREAMABLE; + } + + if(encoder->protected_->max_residual_partition_order >= (1u << FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN)) + encoder->protected_->max_residual_partition_order = (1u << FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN) - 1; + if(encoder->protected_->min_residual_partition_order >= encoder->protected_->max_residual_partition_order) + encoder->protected_->min_residual_partition_order = encoder->protected_->max_residual_partition_order; + + /* validate metadata */ + if(0 == encoder->protected_->metadata && encoder->protected_->num_metadata_blocks > 0) + return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_METADATA; + metadata_has_seektable = false; + metadata_has_vorbis_comment = false; + for(i = 0; i < encoder->protected_->num_metadata_blocks; i++) { + if(encoder->protected_->metadata[i]->type == FLAC__METADATA_TYPE_STREAMINFO) + return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_METADATA; + else if(encoder->protected_->metadata[i]->type == FLAC__METADATA_TYPE_SEEKTABLE) { + if(metadata_has_seektable) /* only one is allowed */ + return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_METADATA; + metadata_has_seektable = true; + if(!FLAC__format_seektable_is_legal(&encoder->protected_->metadata[i]->data.seek_table)) + return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_METADATA; + } + else if(encoder->protected_->metadata[i]->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) { + if(metadata_has_vorbis_comment) /* only one is allowed */ + return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_METADATA; + metadata_has_vorbis_comment = true; + } + else if(encoder->protected_->metadata[i]->type == FLAC__METADATA_TYPE_CUESHEET) { + if(!FLAC__format_cuesheet_is_legal(&encoder->protected_->metadata[i]->data.cue_sheet, encoder->protected_->metadata[i]->data.cue_sheet.is_cd, /*violation=*/0)) + return encoder->protected_->state = FLAC__STREAM_ENCODER_INVALID_METADATA; + } + } + + encoder->private_->input_capacity = 0; + for(i = 0; i < encoder->protected_->channels; i++) { + encoder->private_->integer_signal_unaligned[i] = encoder->private_->integer_signal[i] = 0; +#ifndef FLAC__INTEGER_ONLY_LIBRARY + encoder->private_->real_signal_unaligned[i] = encoder->private_->real_signal[i] = 0; +#endif + } + for(i = 0; i < 2; i++) { + encoder->private_->integer_signal_mid_side_unaligned[i] = encoder->private_->integer_signal_mid_side[i] = 0; +#ifndef FLAC__INTEGER_ONLY_LIBRARY + encoder->private_->real_signal_mid_side_unaligned[i] = encoder->private_->real_signal_mid_side[i] = 0; +#endif + } + for(i = 0; i < encoder->protected_->channels; i++) { + encoder->private_->residual_workspace_unaligned[i][0] = encoder->private_->residual_workspace[i][0] = 0; + encoder->private_->residual_workspace_unaligned[i][1] = encoder->private_->residual_workspace[i][1] = 0; + encoder->private_->best_subframe[i] = 0; + } + for(i = 0; i < 2; i++) { + encoder->private_->residual_workspace_mid_side_unaligned[i][0] = encoder->private_->residual_workspace_mid_side[i][0] = 0; + encoder->private_->residual_workspace_mid_side_unaligned[i][1] = encoder->private_->residual_workspace_mid_side[i][1] = 0; + encoder->private_->best_subframe_mid_side[i] = 0; + } + encoder->private_->abs_residual_unaligned = encoder->private_->abs_residual = 0; + encoder->private_->abs_residual_partition_sums_unaligned = encoder->private_->abs_residual_partition_sums = 0; + encoder->private_->raw_bits_per_partition_unaligned = encoder->private_->raw_bits_per_partition = 0; +#ifndef FLAC__INTEGER_ONLY_LIBRARY + encoder->private_->loose_mid_side_stereo_frames = (unsigned)((FLAC__double)encoder->protected_->sample_rate * 0.4 / (FLAC__double)encoder->protected_->blocksize + 0.5); +#else + /* 26214 is the approximate fixed-point equivalent to 0.4 (0.4 * 2^16) */ + /* sample rate can be up to 655350 Hz, and thus use 20 bits, so we do the multiply÷ by hand */ + FLAC__ASSERT(FLAC__MAX_SAMPLE_RATE <= 655350); + FLAC__ASSERT(FLAC__MAX_BLOCK_SIZE <= 65535); + FLAC__ASSERT(encoder->protected_->sample_rate <= 655350); + FLAC__ASSERT(encoder->protected_->blocksize <= 65535); + encoder->private_->loose_mid_side_stereo_frames = (unsigned)FLAC__fixedpoint_trunc((((FLAC__uint64)(encoder->protected_->sample_rate) * (FLAC__uint64)(26214)) << 16) / (encoder->protected_->blocksize<<16) + FLAC__FP_ONE_HALF); +#endif + if(encoder->private_->loose_mid_side_stereo_frames == 0) + encoder->private_->loose_mid_side_stereo_frames = 1; + encoder->private_->loose_mid_side_stereo_frame_count = 0; + encoder->private_->current_sample_number = 0; + encoder->private_->current_frame_number = 0; + + encoder->private_->use_wide_by_block = (encoder->protected_->bits_per_sample + FLAC__bitmath_ilog2(encoder->protected_->blocksize)+1 > 30); + encoder->private_->use_wide_by_order = (encoder->protected_->bits_per_sample + FLAC__bitmath_ilog2(max(encoder->protected_->max_lpc_order, FLAC__MAX_FIXED_ORDER))+1 > 30); /*@@@ need to use this? */ + encoder->private_->use_wide_by_partition = (false); /*@@@ need to set this */ + + /* + * get the CPU info and set the function pointers + */ + FLAC__cpu_info(&encoder->private_->cpuinfo); + /* first default to the non-asm routines */ +#ifndef FLAC__INTEGER_ONLY_LIBRARY + encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation; +#endif + encoder->private_->local_fixed_compute_best_predictor = FLAC__fixed_compute_best_predictor; +#ifndef FLAC__INTEGER_ONLY_LIBRARY + encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients; + encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_64bit = FLAC__lpc_compute_residual_from_qlp_coefficients_wide; + encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit = FLAC__lpc_compute_residual_from_qlp_coefficients; +#endif + /* now override with asm where appropriate */ +#ifndef FLAC__INTEGER_ONLY_LIBRARY +# ifndef FLAC__NO_ASM + if(encoder->private_->cpuinfo.use_asm) { +# ifdef FLAC__CPU_IA32 + FLAC__ASSERT(encoder->private_->cpuinfo.type == FLAC__CPUINFO_TYPE_IA32); +# ifdef FLAC__HAS_NASM +# ifdef FLAC__SSE_OS + if(encoder->private_->cpuinfo.data.ia32.sse) { + if(encoder->protected_->max_lpc_order < 4) + encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_sse_lag_4; + else if(encoder->protected_->max_lpc_order < 8) + encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_sse_lag_8; + else if(encoder->protected_->max_lpc_order < 12) + encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_sse_lag_12; + else + encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32; + } + else +# endif /* FLAC__SSE_OS */ + if(encoder->private_->cpuinfo.data.ia32._3dnow) + encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_3dnow; + else + encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32; + if(encoder->private_->cpuinfo.data.ia32.mmx) { + encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32; + encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32_mmx; + } + else { + encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32; + encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32; + } + if(encoder->private_->cpuinfo.data.ia32.mmx && encoder->private_->cpuinfo.data.ia32.cmov) + encoder->private_->local_fixed_compute_best_predictor = FLAC__fixed_compute_best_predictor_asm_ia32_mmx_cmov; +# endif /* FLAC__HAS_NASM */ +# endif /* FLAC__CPU_IA32 */ + } +# endif /* !FLAC__NO_ASM */ +#endif /* !FLAC__INTEGER_ONLY_LIBRARY */ + /* finally override based on wide-ness if necessary */ + if(encoder->private_->use_wide_by_block) { + encoder->private_->local_fixed_compute_best_predictor = FLAC__fixed_compute_best_predictor_wide; + } + + /* we require precompute_partition_sums if do_escape_coding because of their intertwined nature */ + encoder->private_->precompute_partition_sums = (encoder->protected_->max_residual_partition_order > encoder->protected_->min_residual_partition_order) || encoder->protected_->do_escape_coding; + + if(!resize_buffers_(encoder, encoder->protected_->blocksize)) { + /* the above function sets the state for us in case of an error */ + return encoder->protected_->state; + } + + if(!FLAC__bitbuffer_init(encoder->private_->frame)) + return encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR; + + /* + * Set up the verify stuff if necessary + */ + if(encoder->protected_->verify) { + /* + * First, set up the fifo which will hold the + * original signal to compare against + */ + encoder->private_->verify.input_fifo.size = encoder->protected_->blocksize; + for(i = 0; i < encoder->protected_->channels; i++) { + if(0 == (encoder->private_->verify.input_fifo.data[i] = (FLAC__int32*)malloc(sizeof(FLAC__int32) * encoder->private_->verify.input_fifo.size))) + return encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR; + } + encoder->private_->verify.input_fifo.tail = 0; + + /* + * Now set up a stream decoder for verification + */ + encoder->private_->verify.decoder = FLAC__stream_decoder_new(); + if(0 == encoder->private_->verify.decoder) + return encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR; + + FLAC__stream_decoder_set_read_callback(encoder->private_->verify.decoder, verify_read_callback_); + FLAC__stream_decoder_set_write_callback(encoder->private_->verify.decoder, verify_write_callback_); + FLAC__stream_decoder_set_metadata_callback(encoder->private_->verify.decoder, verify_metadata_callback_); + FLAC__stream_decoder_set_error_callback(encoder->private_->verify.decoder, verify_error_callback_); + FLAC__stream_decoder_set_client_data(encoder->private_->verify.decoder, encoder); + if(FLAC__stream_decoder_init(encoder->private_->verify.decoder) != FLAC__STREAM_DECODER_SEARCH_FOR_METADATA) + return encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR; + } + encoder->private_->verify.error_stats.absolute_sample = 0; + encoder->private_->verify.error_stats.frame_number = 0; + encoder->private_->verify.error_stats.channel = 0; + encoder->private_->verify.error_stats.sample = 0; + encoder->private_->verify.error_stats.expected = 0; + encoder->private_->verify.error_stats.got = 0; + + /* + * write the stream header + */ + if(encoder->protected_->verify) + encoder->private_->verify.state_hint = ENCODER_IN_MAGIC; + if(!FLAC__bitbuffer_write_raw_uint32(encoder->private_->frame, FLAC__STREAM_SYNC, FLAC__STREAM_SYNC_LEN)) + return encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR; + if(!write_bitbuffer_(encoder, 0)) { + /* the above function sets the state for us in case of an error */ + return encoder->protected_->state; + } + + /* + * write the STREAMINFO metadata block + */ + if(encoder->protected_->verify) + encoder->private_->verify.state_hint = ENCODER_IN_METADATA; + encoder->private_->metadata.type = FLAC__METADATA_TYPE_STREAMINFO; + encoder->private_->metadata.is_last = false; /* we will have at a minimum a VORBIS_COMMENT afterwards */ + encoder->private_->metadata.length = FLAC__STREAM_METADATA_STREAMINFO_LENGTH; + encoder->private_->metadata.data.stream_info.min_blocksize = encoder->protected_->blocksize; /* this encoder uses the same blocksize for the whole stream */ + encoder->private_->metadata.data.stream_info.max_blocksize = encoder->protected_->blocksize; + encoder->private_->metadata.data.stream_info.min_framesize = 0; /* we don't know this yet; have to fill it in later */ + encoder->private_->metadata.data.stream_info.max_framesize = 0; /* we don't know this yet; have to fill it in later */ + encoder->private_->metadata.data.stream_info.sample_rate = encoder->protected_->sample_rate; + encoder->private_->metadata.data.stream_info.channels = encoder->protected_->channels; + encoder->private_->metadata.data.stream_info.bits_per_sample = encoder->protected_->bits_per_sample; + encoder->private_->metadata.data.stream_info.total_samples = encoder->protected_->total_samples_estimate; /* we will replace this later with the real total */ + memset(encoder->private_->metadata.data.stream_info.md5sum, 0, 16); /* we don't know this yet; have to fill it in later */ + FLAC__MD5Init(&encoder->private_->md5context); + if(!FLAC__bitbuffer_clear(encoder->private_->frame)) + return encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR; + if(!FLAC__add_metadata_block(&encoder->private_->metadata, encoder->private_->frame)) + return encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR; + if(!write_bitbuffer_(encoder, 0)) { + /* the above function sets the state for us in case of an error */ + return encoder->protected_->state; + } + + /* + * Now that the STREAMINFO block is written, we can init this to an + * absurdly-high value... + */ + encoder->private_->metadata.data.stream_info.min_framesize = (1u << FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN) - 1; + /* ... and clear this to 0 */ + encoder->private_->metadata.data.stream_info.total_samples = 0; + + /* + * Check to see if the supplied metadata contains a VORBIS_COMMENT; + * if not, we will write an empty one (FLAC__add_metadata_block() + * automatically supplies the vendor string). + * + * WATCHOUT: libOggFLAC depends on us to write this block after the + * STREAMINFO since that's what the mapping requires. (In the case + * that metadata_has_vorbis_comment is true it will have already + * insured that the metadata list is properly ordered.) + */ + if(!metadata_has_vorbis_comment) { + FLAC__StreamMetadata vorbis_comment; + vorbis_comment.type = FLAC__METADATA_TYPE_VORBIS_COMMENT; + vorbis_comment.is_last = (encoder->protected_->num_metadata_blocks == 0); + vorbis_comment.length = 4 + 4; /* MAGIC NUMBER */ + vorbis_comment.data.vorbis_comment.vendor_string.length = 0; + vorbis_comment.data.vorbis_comment.vendor_string.entry = 0; + vorbis_comment.data.vorbis_comment.num_comments = 0; + vorbis_comment.data.vorbis_comment.comments = 0; + if(!FLAC__bitbuffer_clear(encoder->private_->frame)) + return encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR; + if(!FLAC__add_metadata_block(&vorbis_comment, encoder->private_->frame)) + return encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR; + if(!write_bitbuffer_(encoder, 0)) { + /* the above function sets the state for us in case of an error */ + return encoder->protected_->state; + } + } + + /* + * write the user's metadata blocks + */ + for(i = 0; i < encoder->protected_->num_metadata_blocks; i++) { + encoder->protected_->metadata[i]->is_last = (i == encoder->protected_->num_metadata_blocks - 1); + if(!FLAC__bitbuffer_clear(encoder->private_->frame)) + return encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR; + if(!FLAC__add_metadata_block(encoder->protected_->metadata[i], encoder->private_->frame)) + return encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR; + if(!write_bitbuffer_(encoder, 0)) { + /* the above function sets the state for us in case of an error */ + return encoder->protected_->state; + } + } + + if(encoder->protected_->verify) + encoder->private_->verify.state_hint = ENCODER_IN_AUDIO; + + return encoder->protected_->state; +} + +FLAC_API void FLAC__stream_encoder_finish(FLAC__StreamEncoder *encoder) +{ + FLAC__ASSERT(0 != encoder); + + if(encoder->protected_->state == FLAC__STREAM_ENCODER_UNINITIALIZED) + return; + + if(encoder->protected_->state == FLAC__STREAM_ENCODER_OK && !encoder->private_->is_being_deleted) { + if(encoder->private_->current_sample_number != 0) { + encoder->protected_->blocksize = encoder->private_->current_sample_number; + process_frame_(encoder, true); /* true => is last frame */ + } + } + + FLAC__MD5Final(encoder->private_->metadata.data.stream_info.md5sum, &encoder->private_->md5context); + + if(encoder->protected_->state == FLAC__STREAM_ENCODER_OK && !encoder->private_->is_being_deleted) { + encoder->private_->metadata_callback(encoder, &encoder->private_->metadata, encoder->private_->client_data); + } + + if(encoder->protected_->verify && 0 != encoder->private_->verify.decoder) + FLAC__stream_decoder_finish(encoder->private_->verify.decoder); + + free_(encoder); + set_defaults_(encoder); + + encoder->protected_->state = FLAC__STREAM_ENCODER_UNINITIALIZED; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_set_verify(FLAC__StreamEncoder *encoder, FLAC__bool value) +{ + FLAC__ASSERT(0 != encoder); + if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) + return false; +#ifndef FLAC__MANDATORY_VERIFY_WHILE_ENCODING + encoder->protected_->verify = value; +#endif + return true; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_set_streamable_subset(FLAC__StreamEncoder *encoder, FLAC__bool value) +{ + FLAC__ASSERT(0 != encoder); + if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) + return false; + encoder->protected_->streamable_subset = value; + return true; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_set_do_mid_side_stereo(FLAC__StreamEncoder *encoder, FLAC__bool value) +{ + FLAC__ASSERT(0 != encoder); + if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) + return false; + encoder->protected_->do_mid_side_stereo = value; + return true; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_set_loose_mid_side_stereo(FLAC__StreamEncoder *encoder, FLAC__bool value) +{ + FLAC__ASSERT(0 != encoder); + if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) + return false; + encoder->protected_->loose_mid_side_stereo = value; + return true; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_set_channels(FLAC__StreamEncoder *encoder, unsigned value) +{ + FLAC__ASSERT(0 != encoder); + if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) + return false; + encoder->protected_->channels = value; + return true; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_set_bits_per_sample(FLAC__StreamEncoder *encoder, unsigned value) +{ + FLAC__ASSERT(0 != encoder); + if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) + return false; + encoder->protected_->bits_per_sample = value; + return true; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_set_sample_rate(FLAC__StreamEncoder *encoder, unsigned value) +{ + FLAC__ASSERT(0 != encoder); + if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) + return false; + encoder->protected_->sample_rate = value; + return true; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_set_blocksize(FLAC__StreamEncoder *encoder, unsigned value) +{ + FLAC__ASSERT(0 != encoder); + if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) + return false; + encoder->protected_->blocksize = value; + return true; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_set_max_lpc_order(FLAC__StreamEncoder *encoder, unsigned value) +{ + FLAC__ASSERT(0 != encoder); + if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) + return false; + encoder->protected_->max_lpc_order = value; + return true; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_set_qlp_coeff_precision(FLAC__StreamEncoder *encoder, unsigned value) +{ + FLAC__ASSERT(0 != encoder); + if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) + return false; + encoder->protected_->qlp_coeff_precision = value; + return true; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_set_do_qlp_coeff_prec_search(FLAC__StreamEncoder *encoder, FLAC__bool value) +{ + FLAC__ASSERT(0 != encoder); + if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) + return false; + encoder->protected_->do_qlp_coeff_prec_search = value; + return true; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_set_do_escape_coding(FLAC__StreamEncoder *encoder, FLAC__bool value) +{ + FLAC__ASSERT(0 != encoder); + if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) + return false; +#if 0 + /*@@@ deprecated: */ + encoder->protected_->do_escape_coding = value; +#else + (void)value; +#endif + return true; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_set_do_exhaustive_model_search(FLAC__StreamEncoder *encoder, FLAC__bool value) +{ + FLAC__ASSERT(0 != encoder); + if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) + return false; + encoder->protected_->do_exhaustive_model_search = value; + return true; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_set_min_residual_partition_order(FLAC__StreamEncoder *encoder, unsigned value) +{ + FLAC__ASSERT(0 != encoder); + if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) + return false; + encoder->protected_->min_residual_partition_order = value; + return true; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_set_max_residual_partition_order(FLAC__StreamEncoder *encoder, unsigned value) +{ + FLAC__ASSERT(0 != encoder); + if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) + return false; + encoder->protected_->max_residual_partition_order = value; + return true; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_set_rice_parameter_search_dist(FLAC__StreamEncoder *encoder, unsigned value) +{ + FLAC__ASSERT(0 != encoder); + if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) + return false; +#if 0 + /*@@@ deprecated: */ + encoder->protected_->rice_parameter_search_dist = value; +#else + (void)value; +#endif + return true; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_set_total_samples_estimate(FLAC__StreamEncoder *encoder, FLAC__uint64 value) +{ + FLAC__ASSERT(0 != encoder); + if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) + return false; + encoder->protected_->total_samples_estimate = value; + return true; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_set_metadata(FLAC__StreamEncoder *encoder, FLAC__StreamMetadata **metadata, unsigned num_blocks) +{ + FLAC__ASSERT(0 != encoder); + if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) + return false; + encoder->protected_->metadata = metadata; + encoder->protected_->num_metadata_blocks = num_blocks; + return true; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_set_write_callback(FLAC__StreamEncoder *encoder, FLAC__StreamEncoderWriteCallback value) +{ + FLAC__ASSERT(0 != encoder); + FLAC__ASSERT(0 != value); + if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) + return false; + encoder->private_->write_callback = value; + return true; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_set_metadata_callback(FLAC__StreamEncoder *encoder, FLAC__StreamEncoderMetadataCallback value) +{ + FLAC__ASSERT(0 != encoder); + FLAC__ASSERT(0 != value); + if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) + return false; + encoder->private_->metadata_callback = value; + return true; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_set_client_data(FLAC__StreamEncoder *encoder, void *value) +{ + FLAC__ASSERT(0 != encoder); + if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) + return false; + encoder->private_->client_data = value; + return true; +} + +/* + * These three functions are not static, but not publically exposed in + * include/FLAC/ either. They are used by the test suite. + */ +FLAC_API FLAC__bool FLAC__stream_encoder_disable_constant_subframes(FLAC__StreamEncoder *encoder, FLAC__bool value) +{ + FLAC__ASSERT(0 != encoder); + if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) + return false; + encoder->private_->disable_constant_subframes = value; + return true; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_disable_fixed_subframes(FLAC__StreamEncoder *encoder, FLAC__bool value) +{ + FLAC__ASSERT(0 != encoder); + if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) + return false; + encoder->private_->disable_fixed_subframes = value; + return true; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_disable_verbatim_subframes(FLAC__StreamEncoder *encoder, FLAC__bool value) +{ + FLAC__ASSERT(0 != encoder); + if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) + return false; + encoder->private_->disable_verbatim_subframes = value; + return true; +} + +FLAC_API FLAC__StreamEncoderState FLAC__stream_encoder_get_state(const FLAC__StreamEncoder *encoder) +{ + FLAC__ASSERT(0 != encoder); + return encoder->protected_->state; +} + +FLAC_API FLAC__StreamDecoderState FLAC__stream_encoder_get_verify_decoder_state(const FLAC__StreamEncoder *encoder) +{ + FLAC__ASSERT(0 != encoder); + if(encoder->protected_->verify) + return FLAC__stream_decoder_get_state(encoder->private_->verify.decoder); + else + return FLAC__STREAM_DECODER_UNINITIALIZED; +} + +FLAC_API const char *FLAC__stream_encoder_get_resolved_state_string(const FLAC__StreamEncoder *encoder) +{ + if(encoder->protected_->state != FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR) + return FLAC__StreamEncoderStateString[encoder->protected_->state]; + else + return FLAC__stream_decoder_get_resolved_state_string(encoder->private_->verify.decoder); +} + +FLAC_API void FLAC__stream_encoder_get_verify_decoder_error_stats(const FLAC__StreamEncoder *encoder, FLAC__uint64 *absolute_sample, unsigned *frame_number, unsigned *channel, unsigned *sample, FLAC__int32 *expected, FLAC__int32 *got) +{ + FLAC__ASSERT(0 != encoder); + if(0 != absolute_sample) + *absolute_sample = encoder->private_->verify.error_stats.absolute_sample; + if(0 != frame_number) + *frame_number = encoder->private_->verify.error_stats.frame_number; + if(0 != channel) + *channel = encoder->private_->verify.error_stats.channel; + if(0 != sample) + *sample = encoder->private_->verify.error_stats.sample; + if(0 != expected) + *expected = encoder->private_->verify.error_stats.expected; + if(0 != got) + *got = encoder->private_->verify.error_stats.got; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_get_verify(const FLAC__StreamEncoder *encoder) +{ + FLAC__ASSERT(0 != encoder); + return encoder->protected_->verify; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_get_streamable_subset(const FLAC__StreamEncoder *encoder) +{ + FLAC__ASSERT(0 != encoder); + return encoder->protected_->streamable_subset; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_get_do_mid_side_stereo(const FLAC__StreamEncoder *encoder) +{ + FLAC__ASSERT(0 != encoder); + return encoder->protected_->do_mid_side_stereo; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_get_loose_mid_side_stereo(const FLAC__StreamEncoder *encoder) +{ + FLAC__ASSERT(0 != encoder); + return encoder->protected_->loose_mid_side_stereo; +} + +FLAC_API unsigned FLAC__stream_encoder_get_channels(const FLAC__StreamEncoder *encoder) +{ + FLAC__ASSERT(0 != encoder); + return encoder->protected_->channels; +} + +FLAC_API unsigned FLAC__stream_encoder_get_bits_per_sample(const FLAC__StreamEncoder *encoder) +{ + FLAC__ASSERT(0 != encoder); + return encoder->protected_->bits_per_sample; +} + +FLAC_API unsigned FLAC__stream_encoder_get_sample_rate(const FLAC__StreamEncoder *encoder) +{ + FLAC__ASSERT(0 != encoder); + return encoder->protected_->sample_rate; +} + +FLAC_API unsigned FLAC__stream_encoder_get_blocksize(const FLAC__StreamEncoder *encoder) +{ + FLAC__ASSERT(0 != encoder); + return encoder->protected_->blocksize; +} + +FLAC_API unsigned FLAC__stream_encoder_get_max_lpc_order(const FLAC__StreamEncoder *encoder) +{ + FLAC__ASSERT(0 != encoder); + return encoder->protected_->max_lpc_order; +} + +FLAC_API unsigned FLAC__stream_encoder_get_qlp_coeff_precision(const FLAC__StreamEncoder *encoder) +{ + FLAC__ASSERT(0 != encoder); + return encoder->protected_->qlp_coeff_precision; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_get_do_qlp_coeff_prec_search(const FLAC__StreamEncoder *encoder) +{ + FLAC__ASSERT(0 != encoder); + return encoder->protected_->do_qlp_coeff_prec_search; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_get_do_escape_coding(const FLAC__StreamEncoder *encoder) +{ + FLAC__ASSERT(0 != encoder); + return encoder->protected_->do_escape_coding; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_get_do_exhaustive_model_search(const FLAC__StreamEncoder *encoder) +{ + FLAC__ASSERT(0 != encoder); + return encoder->protected_->do_exhaustive_model_search; +} + +FLAC_API unsigned FLAC__stream_encoder_get_min_residual_partition_order(const FLAC__StreamEncoder *encoder) +{ + FLAC__ASSERT(0 != encoder); + return encoder->protected_->min_residual_partition_order; +} + +FLAC_API unsigned FLAC__stream_encoder_get_max_residual_partition_order(const FLAC__StreamEncoder *encoder) +{ + FLAC__ASSERT(0 != encoder); + return encoder->protected_->max_residual_partition_order; +} + +FLAC_API unsigned FLAC__stream_encoder_get_rice_parameter_search_dist(const FLAC__StreamEncoder *encoder) +{ + FLAC__ASSERT(0 != encoder); + return encoder->protected_->rice_parameter_search_dist; +} + +FLAC_API FLAC__uint64 FLAC__stream_encoder_get_total_samples_estimate(const FLAC__StreamEncoder *encoder) +{ + FLAC__ASSERT(0 != encoder); + return encoder->protected_->total_samples_estimate; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_process(FLAC__StreamEncoder *encoder, const FLAC__int32 * const buffer[], unsigned samples) +{ + unsigned i, j, channel; + FLAC__int32 x, mid, side; + const unsigned channels = encoder->protected_->channels, blocksize = encoder->protected_->blocksize; + + FLAC__ASSERT(0 != encoder); + FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK); + + j = 0; + /* + * we have several flavors of the same basic loop, optimized for + * different conditions: + */ + if(encoder->protected_->max_lpc_order > 0) { + if(encoder->protected_->do_mid_side_stereo && channels == 2) { + /* + * stereo coding: unroll channel loop + * with LPC: calculate floating point version of signal + */ + do { + if(encoder->protected_->verify) + append_to_verify_fifo_(&encoder->private_->verify.input_fifo, buffer, j, channels, min(blocksize-encoder->private_->current_sample_number, samples-j)); + + for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) { + x = mid = side = buffer[0][j]; + encoder->private_->integer_signal[0][i] = x; +#ifndef FLAC__INTEGER_ONLY_LIBRARY + encoder->private_->real_signal[0][i] = (FLAC__real)x; +#endif + x = buffer[1][j]; + encoder->private_->integer_signal[1][i] = x; +#ifndef FLAC__INTEGER_ONLY_LIBRARY + encoder->private_->real_signal[1][i] = (FLAC__real)x; +#endif + mid += x; + side -= x; + mid >>= 1; /* NOTE: not the same as 'mid = (buffer[0][j] + buffer[1][j]) / 2' ! */ + encoder->private_->integer_signal_mid_side[1][i] = side; + encoder->private_->integer_signal_mid_side[0][i] = mid; +#ifndef FLAC__INTEGER_ONLY_LIBRARY + encoder->private_->real_signal_mid_side[1][i] = (FLAC__real)side; + encoder->private_->real_signal_mid_side[0][i] = (FLAC__real)mid; +#endif + encoder->private_->current_sample_number++; + } + if(i == blocksize) { + if(!process_frame_(encoder, false)) /* false => not last frame */ + return false; + } + } while(j < samples); + } + else { + /* + * independent channel coding: buffer each channel in inner loop + * with LPC: calculate floating point version of signal + */ + do { + if(encoder->protected_->verify) + append_to_verify_fifo_(&encoder->private_->verify.input_fifo, buffer, j, channels, min(blocksize-encoder->private_->current_sample_number, samples-j)); + + for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) { + for(channel = 0; channel < channels; channel++) { + x = buffer[channel][j]; + encoder->private_->integer_signal[channel][i] = x; +#ifndef FLAC__INTEGER_ONLY_LIBRARY + encoder->private_->real_signal[channel][i] = (FLAC__real)x; +#endif + } + encoder->private_->current_sample_number++; + } + if(i == blocksize) { + if(!process_frame_(encoder, false)) /* false => not last frame */ + return false; + } + } while(j < samples); + } + } + else { + if(encoder->protected_->do_mid_side_stereo && channels == 2) { + /* + * stereo coding: unroll channel loop + * without LPC: no need to calculate floating point version of signal + */ + do { + if(encoder->protected_->verify) + append_to_verify_fifo_(&encoder->private_->verify.input_fifo, buffer, j, channels, min(blocksize-encoder->private_->current_sample_number, samples-j)); + + for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) { + encoder->private_->integer_signal[0][i] = mid = side = buffer[0][j]; + x = buffer[1][j]; + encoder->private_->integer_signal[1][i] = x; + mid += x; + side -= x; + mid >>= 1; /* NOTE: not the same as 'mid = (buffer[0][j] + buffer[1][j]) / 2' ! */ + encoder->private_->integer_signal_mid_side[1][i] = side; + encoder->private_->integer_signal_mid_side[0][i] = mid; + encoder->private_->current_sample_number++; + } + if(i == blocksize) { + if(!process_frame_(encoder, false)) /* false => not last frame */ + return false; + } + } while(j < samples); + } + else { + /* + * independent channel coding: buffer each channel in inner loop + * without LPC: no need to calculate floating point version of signal + */ + do { + if(encoder->protected_->verify) + append_to_verify_fifo_(&encoder->private_->verify.input_fifo, buffer, j, channels, min(blocksize-encoder->private_->current_sample_number, samples-j)); + + for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) { + for(channel = 0; channel < channels; channel++) + encoder->private_->integer_signal[channel][i] = buffer[channel][j]; + encoder->private_->current_sample_number++; + } + if(i == blocksize) { + if(!process_frame_(encoder, false)) /* false => not last frame */ + return false; + } + } while(j < samples); + } + } + + return true; +} + +FLAC_API FLAC__bool FLAC__stream_encoder_process_interleaved(FLAC__StreamEncoder *encoder, const FLAC__int32 buffer[], unsigned samples) +{ + unsigned i, j, k, channel; + FLAC__int32 x, mid, side; + const unsigned channels = encoder->protected_->channels, blocksize = encoder->protected_->blocksize; + + FLAC__ASSERT(0 != encoder); + FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK); + + j = k = 0; + /* + * we have several flavors of the same basic loop, optimized for + * different conditions: + */ + if(encoder->protected_->max_lpc_order > 0) { + if(encoder->protected_->do_mid_side_stereo && channels == 2) { + /* + * stereo coding: unroll channel loop + * with LPC: calculate floating point version of signal + */ + do { + if(encoder->protected_->verify) + append_to_verify_fifo_interleaved_(&encoder->private_->verify.input_fifo, buffer, j, channels, min(blocksize-encoder->private_->current_sample_number, samples-j)); + + for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) { + x = mid = side = buffer[k++]; + encoder->private_->integer_signal[0][i] = x; +#ifndef FLAC__INTEGER_ONLY_LIBRARY + encoder->private_->real_signal[0][i] = (FLAC__real)x; +#endif + x = buffer[k++]; + encoder->private_->integer_signal[1][i] = x; +#ifndef FLAC__INTEGER_ONLY_LIBRARY + encoder->private_->real_signal[1][i] = (FLAC__real)x; +#endif + mid += x; + side -= x; + mid >>= 1; /* NOTE: not the same as 'mid = (left + right) / 2' ! */ + encoder->private_->integer_signal_mid_side[1][i] = side; + encoder->private_->integer_signal_mid_side[0][i] = mid; +#ifndef FLAC__INTEGER_ONLY_LIBRARY + encoder->private_->real_signal_mid_side[1][i] = (FLAC__real)side; + encoder->private_->real_signal_mid_side[0][i] = (FLAC__real)mid; +#endif + encoder->private_->current_sample_number++; + } + if(i == blocksize) { + if(!process_frame_(encoder, false)) /* false => not last frame */ + return false; + } + } while(j < samples); + } + else { + /* + * independent channel coding: buffer each channel in inner loop + * with LPC: calculate floating point version of signal + */ + do { + if(encoder->protected_->verify) + append_to_verify_fifo_interleaved_(&encoder->private_->verify.input_fifo, buffer, j, channels, min(blocksize-encoder->private_->current_sample_number, samples-j)); + + for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) { + for(channel = 0; channel < channels; channel++) { + x = buffer[k++]; + encoder->private_->integer_signal[channel][i] = x; +#ifndef FLAC__INTEGER_ONLY_LIBRARY + encoder->private_->real_signal[channel][i] = (FLAC__real)x; +#endif + } + encoder->private_->current_sample_number++; + } + if(i == blocksize) { + if(!process_frame_(encoder, false)) /* false => not last frame */ + return false; + } + } while(j < samples); + } + } + else { + if(encoder->protected_->do_mid_side_stereo && channels == 2) { + /* + * stereo coding: unroll channel loop + * without LPC: no need to calculate floating point version of signal + */ + do { + if(encoder->protected_->verify) + append_to_verify_fifo_interleaved_(&encoder->private_->verify.input_fifo, buffer, j, channels, min(blocksize-encoder->private_->current_sample_number, samples-j)); + + for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) { + encoder->private_->integer_signal[0][i] = mid = side = buffer[k++]; + x = buffer[k++]; + encoder->private_->integer_signal[1][i] = x; + mid += x; + side -= x; + mid >>= 1; /* NOTE: not the same as 'mid = (left + right) / 2' ! */ + encoder->private_->integer_signal_mid_side[1][i] = side; + encoder->private_->integer_signal_mid_side[0][i] = mid; + encoder->private_->current_sample_number++; + } + if(i == blocksize) { + if(!process_frame_(encoder, false)) /* false => not last frame */ + return false; + } + } while(j < samples); + } + else { + /* + * independent channel coding: buffer each channel in inner loop + * without LPC: no need to calculate floating point version of signal + */ + do { + if(encoder->protected_->verify) + append_to_verify_fifo_interleaved_(&encoder->private_->verify.input_fifo, buffer, j, channels, min(blocksize-encoder->private_->current_sample_number, samples-j)); + + for(i = encoder->private_->current_sample_number; i < blocksize && j < samples; i++, j++) { + for(channel = 0; channel < channels; channel++) + encoder->private_->integer_signal[channel][i] = buffer[k++]; + encoder->private_->current_sample_number++; + } + if(i == blocksize) { + if(!process_frame_(encoder, false)) /* false => not last frame */ + return false; + } + } while(j < samples); + } + } + + return true; +} + +/*********************************************************************** + * + * Private class methods + * + ***********************************************************************/ + +void set_defaults_(FLAC__StreamEncoder *encoder) +{ + FLAC__ASSERT(0 != encoder); + +#ifdef FLAC__MANDATORY_VERIFY_WHILE_ENCODING + encoder->protected_->verify = true; +#else + encoder->protected_->verify = false; +#endif + encoder->protected_->streamable_subset = true; + encoder->protected_->do_mid_side_stereo = false; + encoder->protected_->loose_mid_side_stereo = false; + encoder->protected_->channels = 2; + encoder->protected_->bits_per_sample = 16; + encoder->protected_->sample_rate = 44100; + encoder->protected_->blocksize = 1152; + encoder->protected_->max_lpc_order = 0; + encoder->protected_->qlp_coeff_precision = 0; + encoder->protected_->do_qlp_coeff_prec_search = false; + encoder->protected_->do_exhaustive_model_search = false; + encoder->protected_->do_escape_coding = false; + encoder->protected_->min_residual_partition_order = 0; + encoder->protected_->max_residual_partition_order = 0; + encoder->protected_->rice_parameter_search_dist = 0; + encoder->protected_->total_samples_estimate = 0; + encoder->protected_->metadata = 0; + encoder->protected_->num_metadata_blocks = 0; + + encoder->private_->disable_constant_subframes = false; + encoder->private_->disable_fixed_subframes = false; + encoder->private_->disable_verbatim_subframes = false; + encoder->private_->write_callback = 0; + encoder->private_->metadata_callback = 0; + encoder->private_->client_data = 0; +} + +void free_(FLAC__StreamEncoder *encoder) +{ + unsigned i, channel; + + FLAC__ASSERT(0 != encoder); + for(i = 0; i < encoder->protected_->channels; i++) { + if(0 != encoder->private_->integer_signal_unaligned[i]) { + free(encoder->private_->integer_signal_unaligned[i]); + encoder->private_->integer_signal_unaligned[i] = 0; + } +#ifndef FLAC__INTEGER_ONLY_LIBRARY + if(0 != encoder->private_->real_signal_unaligned[i]) { + free(encoder->private_->real_signal_unaligned[i]); + encoder->private_->real_signal_unaligned[i] = 0; + } +#endif + } + for(i = 0; i < 2; i++) { + if(0 != encoder->private_->integer_signal_mid_side_unaligned[i]) { + free(encoder->private_->integer_signal_mid_side_unaligned[i]); + encoder->private_->integer_signal_mid_side_unaligned[i] = 0; + } +#ifndef FLAC__INTEGER_ONLY_LIBRARY + if(0 != encoder->private_->real_signal_mid_side_unaligned[i]) { + free(encoder->private_->real_signal_mid_side_unaligned[i]); + encoder->private_->real_signal_mid_side_unaligned[i] = 0; + } +#endif + } + for(channel = 0; channel < encoder->protected_->channels; channel++) { + for(i = 0; i < 2; i++) { + if(0 != encoder->private_->residual_workspace_unaligned[channel][i]) { + free(encoder->private_->residual_workspace_unaligned[channel][i]); + encoder->private_->residual_workspace_unaligned[channel][i] = 0; + } + } + } + for(channel = 0; channel < 2; channel++) { + for(i = 0; i < 2; i++) { + if(0 != encoder->private_->residual_workspace_mid_side_unaligned[channel][i]) { + free(encoder->private_->residual_workspace_mid_side_unaligned[channel][i]); + encoder->private_->residual_workspace_mid_side_unaligned[channel][i] = 0; + } + } + } + if(0 != encoder->private_->abs_residual_unaligned) { + free(encoder->private_->abs_residual_unaligned); + encoder->private_->abs_residual_unaligned = 0; + } + if(0 != encoder->private_->abs_residual_partition_sums_unaligned) { + free(encoder->private_->abs_residual_partition_sums_unaligned); + encoder->private_->abs_residual_partition_sums_unaligned = 0; + } + if(0 != encoder->private_->raw_bits_per_partition_unaligned) { + free(encoder->private_->raw_bits_per_partition_unaligned); + encoder->private_->raw_bits_per_partition_unaligned = 0; + } + if(encoder->protected_->verify) { + for(i = 0; i < encoder->protected_->channels; i++) { + if(0 != encoder->private_->verify.input_fifo.data[i]) { + free(encoder->private_->verify.input_fifo.data[i]); + encoder->private_->verify.input_fifo.data[i] = 0; + } + } + } + FLAC__bitbuffer_free(encoder->private_->frame); +} + +FLAC__bool resize_buffers_(FLAC__StreamEncoder *encoder, unsigned new_size) +{ + FLAC__bool ok; + unsigned i, channel; + + FLAC__ASSERT(new_size > 0); + FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK); + FLAC__ASSERT(encoder->private_->current_sample_number == 0); + + /* To avoid excessive malloc'ing, we only grow the buffer; no shrinking. */ + if(new_size <= encoder->private_->input_capacity) + return true; + + ok = true; + + /* WATCHOUT: FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32_mmx() + * requires that the input arrays (in our case the integer signals) + * have a buffer of up to 3 zeroes in front (at negative indices) for + * alignment purposes; we use 4 to keep the data well-aligned. + */ + + for(i = 0; ok && i < encoder->protected_->channels; i++) { + ok = ok && FLAC__memory_alloc_aligned_int32_array(new_size+4, &encoder->private_->integer_signal_unaligned[i], &encoder->private_->integer_signal[i]); +#ifndef FLAC__INTEGER_ONLY_LIBRARY + if(encoder->protected_->max_lpc_order > 0) + ok = ok && FLAC__memory_alloc_aligned_real_array(new_size, &encoder->private_->real_signal_unaligned[i], &encoder->private_->real_signal[i]); +#endif + memset(encoder->private_->integer_signal[i], 0, sizeof(FLAC__int32)*4); + encoder->private_->integer_signal[i] += 4; + } + for(i = 0; ok && i < 2; i++) { + ok = ok && FLAC__memory_alloc_aligned_int32_array(new_size+4, &encoder->private_->integer_signal_mid_side_unaligned[i], &encoder->private_->integer_signal_mid_side[i]); +#ifndef FLAC__INTEGER_ONLY_LIBRARY + if(encoder->protected_->max_lpc_order > 0) + ok = ok && FLAC__memory_alloc_aligned_real_array(new_size, &encoder->private_->real_signal_mid_side_unaligned[i], &encoder->private_->real_signal_mid_side[i]); +#endif + memset(encoder->private_->integer_signal_mid_side[i], 0, sizeof(FLAC__int32)*4); + encoder->private_->integer_signal_mid_side[i] += 4; + } + for(channel = 0; ok && channel < encoder->protected_->channels; channel++) { + for(i = 0; ok && i < 2; i++) { + ok = ok && FLAC__memory_alloc_aligned_int32_array(new_size, &encoder->private_->residual_workspace_unaligned[channel][i], &encoder->private_->residual_workspace[channel][i]); + } + } + for(channel = 0; ok && channel < 2; channel++) { + for(i = 0; ok && i < 2; i++) { + ok = ok && FLAC__memory_alloc_aligned_int32_array(new_size, &encoder->private_->residual_workspace_mid_side_unaligned[channel][i], &encoder->private_->residual_workspace_mid_side[channel][i]); + } + } + ok = ok && FLAC__memory_alloc_aligned_uint32_array(new_size, &encoder->private_->abs_residual_unaligned, &encoder->private_->abs_residual); + if(encoder->private_->precompute_partition_sums || encoder->protected_->do_escape_coding) /* we require precompute_partition_sums if do_escape_coding because of their intertwined nature */ + ok = ok && FLAC__memory_alloc_aligned_uint64_array(new_size * 2, &encoder->private_->abs_residual_partition_sums_unaligned, &encoder->private_->abs_residual_partition_sums); + if(encoder->protected_->do_escape_coding) + ok = ok && FLAC__memory_alloc_aligned_unsigned_array(new_size * 2, &encoder->private_->raw_bits_per_partition_unaligned, &encoder->private_->raw_bits_per_partition); + + if(ok) + encoder->private_->input_capacity = new_size; + else + encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR; + + return ok; +} + +FLAC__bool write_bitbuffer_(FLAC__StreamEncoder *encoder, unsigned samples) +{ + const FLAC__byte *buffer; + unsigned bytes; + + FLAC__ASSERT(FLAC__bitbuffer_is_byte_aligned(encoder->private_->frame)); + + FLAC__bitbuffer_get_buffer(encoder->private_->frame, &buffer, &bytes); + + if(encoder->protected_->verify) { + encoder->private_->verify.output.data = buffer; + encoder->private_->verify.output.bytes = bytes; + if(encoder->private_->verify.state_hint == ENCODER_IN_MAGIC) { + encoder->private_->verify.needs_magic_hack = true; + } + else { + if(!FLAC__stream_decoder_process_single(encoder->private_->verify.decoder)) { + FLAC__bitbuffer_release_buffer(encoder->private_->frame); + if(encoder->protected_->state != FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA) + encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR; + return false; + } + } + } + + if(encoder->private_->write_callback(encoder, buffer, bytes, samples, encoder->private_->current_frame_number, encoder->private_->client_data) != FLAC__STREAM_ENCODER_WRITE_STATUS_OK) { + FLAC__bitbuffer_release_buffer(encoder->private_->frame); + encoder->protected_->state = FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_WRITING; + return false; + } + + FLAC__bitbuffer_release_buffer(encoder->private_->frame); + + if(samples > 0) { + encoder->private_->metadata.data.stream_info.min_framesize = min(bytes, encoder->private_->metadata.data.stream_info.min_framesize); + encoder->private_->metadata.data.stream_info.max_framesize = max(bytes, encoder->private_->metadata.data.stream_info.max_framesize); + } + + return true; +} + +FLAC__bool process_frame_(FLAC__StreamEncoder *encoder, FLAC__bool is_last_frame) +{ + FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK); + + /* + * Accumulate raw signal to the MD5 signature + */ + if(!FLAC__MD5Accumulate(&encoder->private_->md5context, (const FLAC__int32 * const *)encoder->private_->integer_signal, encoder->protected_->channels, encoder->protected_->blocksize, (encoder->protected_->bits_per_sample+7) / 8)) { + encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR; + return false; + } + + /* + * Process the frame header and subframes into the frame bitbuffer + */ + if(!process_subframes_(encoder, is_last_frame)) { + /* the above function sets the state for us in case of an error */ + return false; + } + + /* + * Zero-pad the frame to a byte_boundary + */ + if(!FLAC__bitbuffer_zero_pad_to_byte_boundary(encoder->private_->frame)) { + encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR; + return false; + } + + /* + * CRC-16 the whole thing + */ + FLAC__ASSERT(FLAC__bitbuffer_is_byte_aligned(encoder->private_->frame)); + FLAC__bitbuffer_write_raw_uint32(encoder->private_->frame, FLAC__bitbuffer_get_write_crc16(encoder->private_->frame), FLAC__FRAME_FOOTER_CRC_LEN); + + /* + * Write it + */ + if(!write_bitbuffer_(encoder, encoder->protected_->blocksize)) { + /* the above function sets the state for us in case of an error */ + return false; + } + + /* + * Get ready for the next frame + */ + encoder->private_->current_sample_number = 0; + encoder->private_->current_frame_number++; + encoder->private_->metadata.data.stream_info.total_samples += (FLAC__uint64)encoder->protected_->blocksize; + + return true; +} + +FLAC__bool process_subframes_(FLAC__StreamEncoder *encoder, FLAC__bool is_last_frame) +{ + FLAC__FrameHeader frame_header; + unsigned channel, min_partition_order = encoder->protected_->min_residual_partition_order, max_partition_order; + FLAC__bool do_independent, do_mid_side, precompute_partition_sums; + + /* + * Calculate the min,max Rice partition orders + */ + if(is_last_frame) { + max_partition_order = 0; + } + else { + max_partition_order = FLAC__format_get_max_rice_partition_order_from_blocksize(encoder->protected_->blocksize); + max_partition_order = min(max_partition_order, encoder->protected_->max_residual_partition_order); + } + min_partition_order = min(min_partition_order, max_partition_order); + + precompute_partition_sums = encoder->private_->precompute_partition_sums && ((max_partition_order > min_partition_order) || encoder->protected_->do_escape_coding); + + /* + * Setup the frame + */ + if(!FLAC__bitbuffer_clear(encoder->private_->frame)) { + encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR; + return false; + } + frame_header.blocksize = encoder->protected_->blocksize; + frame_header.sample_rate = encoder->protected_->sample_rate; + frame_header.channels = encoder->protected_->channels; + frame_header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT; /* the default unless the encoder determines otherwise */ + frame_header.bits_per_sample = encoder->protected_->bits_per_sample; + frame_header.number_type = FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER; + frame_header.number.frame_number = encoder->private_->current_frame_number; + + /* + * Figure out what channel assignments to try + */ + if(encoder->protected_->do_mid_side_stereo) { + if(encoder->protected_->loose_mid_side_stereo) { + if(encoder->private_->loose_mid_side_stereo_frame_count == 0) { + do_independent = true; + do_mid_side = true; + } + else { + do_independent = (encoder->private_->last_channel_assignment == FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT); + do_mid_side = !do_independent; + } + } + else { + do_independent = true; + do_mid_side = true; + } + } + else { + do_independent = true; + do_mid_side = false; + } + + FLAC__ASSERT(do_independent || do_mid_side); + + /* + * Check for wasted bits; set effective bps for each subframe + */ + if(do_independent) { + for(channel = 0; channel < encoder->protected_->channels; channel++) { + const unsigned w = get_wasted_bits_(encoder->private_->integer_signal[channel], encoder->protected_->blocksize); + encoder->private_->subframe_workspace[channel][0].wasted_bits = encoder->private_->subframe_workspace[channel][1].wasted_bits = w; + encoder->private_->subframe_bps[channel] = encoder->protected_->bits_per_sample - w; + } + } + if(do_mid_side) { + FLAC__ASSERT(encoder->protected_->channels == 2); + for(channel = 0; channel < 2; channel++) { + const unsigned w = get_wasted_bits_(encoder->private_->integer_signal_mid_side[channel], encoder->protected_->blocksize); + encoder->private_->subframe_workspace_mid_side[channel][0].wasted_bits = encoder->private_->subframe_workspace_mid_side[channel][1].wasted_bits = w; + encoder->private_->subframe_bps_mid_side[channel] = encoder->protected_->bits_per_sample - w + (channel==0? 0:1); + } + } + + /* + * First do a normal encoding pass of each independent channel + */ + if(do_independent) { + for(channel = 0; channel < encoder->protected_->channels; channel++) { + if(! + process_subframe_( + encoder, + min_partition_order, + max_partition_order, + precompute_partition_sums, + &frame_header, + encoder->private_->subframe_bps[channel], + encoder->private_->integer_signal[channel], +#ifndef FLAC__INTEGER_ONLY_LIBRARY + encoder->private_->real_signal[channel], +#endif + encoder->private_->subframe_workspace_ptr[channel], + encoder->private_->partitioned_rice_contents_workspace_ptr[channel], + encoder->private_->residual_workspace[channel], + encoder->private_->best_subframe+channel, + encoder->private_->best_subframe_bits+channel + ) + ) + return false; + } + } + + /* + * Now do mid and side channels if requested + */ + if(do_mid_side) { + FLAC__ASSERT(encoder->protected_->channels == 2); + + for(channel = 0; channel < 2; channel++) { + if(! + process_subframe_( + encoder, + min_partition_order, + max_partition_order, + precompute_partition_sums, + &frame_header, + encoder->private_->subframe_bps_mid_side[channel], + encoder->private_->integer_signal_mid_side[channel], +#ifndef FLAC__INTEGER_ONLY_LIBRARY + encoder->private_->real_signal_mid_side[channel], +#endif + encoder->private_->subframe_workspace_ptr_mid_side[channel], + encoder->private_->partitioned_rice_contents_workspace_ptr_mid_side[channel], + encoder->private_->residual_workspace_mid_side[channel], + encoder->private_->best_subframe_mid_side+channel, + encoder->private_->best_subframe_bits_mid_side+channel + ) + ) + return false; + } + } + + /* + * Compose the frame bitbuffer + */ + if(do_mid_side) { + unsigned left_bps = 0, right_bps = 0; /* initialized only to prevent superfluous compiler warning */ + FLAC__Subframe *left_subframe = 0, *right_subframe = 0; /* initialized only to prevent superfluous compiler warning */ + FLAC__ChannelAssignment channel_assignment; + + FLAC__ASSERT(encoder->protected_->channels == 2); + + if(encoder->protected_->loose_mid_side_stereo && encoder->private_->loose_mid_side_stereo_frame_count > 0) { + channel_assignment = (encoder->private_->last_channel_assignment == FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT? FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT : FLAC__CHANNEL_ASSIGNMENT_MID_SIDE); + } + else { + unsigned bits[4]; /* WATCHOUT - indexed by FLAC__ChannelAssignment */ + unsigned min_bits; + FLAC__ChannelAssignment ca; + + FLAC__ASSERT(do_independent && do_mid_side); + + /* We have to figure out which channel assignent results in the smallest frame */ + bits[FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT] = encoder->private_->best_subframe_bits [0] + encoder->private_->best_subframe_bits [1]; + bits[FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE ] = encoder->private_->best_subframe_bits [0] + encoder->private_->best_subframe_bits_mid_side[1]; + bits[FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE ] = encoder->private_->best_subframe_bits [1] + encoder->private_->best_subframe_bits_mid_side[1]; + bits[FLAC__CHANNEL_ASSIGNMENT_MID_SIDE ] = encoder->private_->best_subframe_bits_mid_side[0] + encoder->private_->best_subframe_bits_mid_side[1]; + + for(channel_assignment = (FLAC__ChannelAssignment)0, min_bits = bits[0], ca = (FLAC__ChannelAssignment)1; (int)ca <= 3; ca = (FLAC__ChannelAssignment)((int)ca + 1)) { + if(bits[ca] < min_bits) { + min_bits = bits[ca]; + channel_assignment = ca; + } + } + } + + frame_header.channel_assignment = channel_assignment; + + if(!FLAC__frame_add_header(&frame_header, encoder->protected_->streamable_subset, encoder->private_->frame)) { + encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR; + return false; + } + + switch(channel_assignment) { + case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT: + left_subframe = &encoder->private_->subframe_workspace [0][encoder->private_->best_subframe [0]]; + right_subframe = &encoder->private_->subframe_workspace [1][encoder->private_->best_subframe [1]]; + break; + case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE: + left_subframe = &encoder->private_->subframe_workspace [0][encoder->private_->best_subframe [0]]; + right_subframe = &encoder->private_->subframe_workspace_mid_side[1][encoder->private_->best_subframe_mid_side[1]]; + break; + case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE: + left_subframe = &encoder->private_->subframe_workspace_mid_side[1][encoder->private_->best_subframe_mid_side[1]]; + right_subframe = &encoder->private_->subframe_workspace [1][encoder->private_->best_subframe [1]]; + break; + case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE: + left_subframe = &encoder->private_->subframe_workspace_mid_side[0][encoder->private_->best_subframe_mid_side[0]]; + right_subframe = &encoder->private_->subframe_workspace_mid_side[1][encoder->private_->best_subframe_mid_side[1]]; + break; + default: + FLAC__ASSERT(0); + } + + switch(channel_assignment) { + case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT: + left_bps = encoder->private_->subframe_bps [0]; + right_bps = encoder->private_->subframe_bps [1]; + break; + case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE: + left_bps = encoder->private_->subframe_bps [0]; + right_bps = encoder->private_->subframe_bps_mid_side[1]; + break; + case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE: + left_bps = encoder->private_->subframe_bps_mid_side[1]; + right_bps = encoder->private_->subframe_bps [1]; + break; + case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE: + left_bps = encoder->private_->subframe_bps_mid_side[0]; + right_bps = encoder->private_->subframe_bps_mid_side[1]; + break; + default: + FLAC__ASSERT(0); + } + + /* note that encoder_add_subframe_ sets the state for us in case of an error */ + if(!add_subframe_(encoder, &frame_header, left_bps , left_subframe , encoder->private_->frame)) + return false; + if(!add_subframe_(encoder, &frame_header, right_bps, right_subframe, encoder->private_->frame)) + return false; + } + else { + if(!FLAC__frame_add_header(&frame_header, encoder->protected_->streamable_subset, encoder->private_->frame)) { + encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR; + return false; + } + + for(channel = 0; channel < encoder->protected_->channels; channel++) { + if(!add_subframe_(encoder, &frame_header, encoder->private_->subframe_bps[channel], &encoder->private_->subframe_workspace[channel][encoder->private_->best_subframe[channel]], encoder->private_->frame)) { + /* the above function sets the state for us in case of an error */ + return false; + } + } + } + + if(encoder->protected_->loose_mid_side_stereo) { + encoder->private_->loose_mid_side_stereo_frame_count++; + if(encoder->private_->loose_mid_side_stereo_frame_count >= encoder->private_->loose_mid_side_stereo_frames) + encoder->private_->loose_mid_side_stereo_frame_count = 0; + } + + encoder->private_->last_channel_assignment = frame_header.channel_assignment; + + return true; +} + +FLAC__bool process_subframe_( + FLAC__StreamEncoder *encoder, + unsigned min_partition_order, + unsigned max_partition_order, + FLAC__bool precompute_partition_sums, + const FLAC__FrameHeader *frame_header, + unsigned subframe_bps, + const FLAC__int32 integer_signal[], +#ifndef FLAC__INTEGER_ONLY_LIBRARY + const FLAC__real real_signal[], +#endif + FLAC__Subframe *subframe[2], + FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents[2], + FLAC__int32 *residual[2], + unsigned *best_subframe, + unsigned *best_bits +) +{ +#ifndef FLAC__INTEGER_ONLY_LIBRARY + FLAC__float fixed_residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1]; +#else + FLAC__fixedpoint fixed_residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1]; +#endif +#ifndef FLAC__INTEGER_ONLY_LIBRARY + FLAC__double lpc_residual_bits_per_sample; + FLAC__real autoc[FLAC__MAX_LPC_ORDER+1]; /* WATCHOUT: the size is important even though encoder->protected_->max_lpc_order might be less; some asm routines need all the space */ + FLAC__double lpc_error[FLAC__MAX_LPC_ORDER]; + unsigned min_lpc_order, max_lpc_order, lpc_order; + unsigned min_qlp_coeff_precision, max_qlp_coeff_precision, qlp_coeff_precision; +#endif + unsigned min_fixed_order, max_fixed_order, guess_fixed_order, fixed_order; + unsigned rice_parameter; + unsigned _candidate_bits, _best_bits; + unsigned _best_subframe; + + /* verbatim subframe is the baseline against which we measure other compressed subframes */ + _best_subframe = 0; + if(encoder->private_->disable_verbatim_subframes && frame_header->blocksize >= FLAC__MAX_FIXED_ORDER) + _best_bits = UINT_MAX; + else + _best_bits = evaluate_verbatim_subframe_(integer_signal, frame_header->blocksize, subframe_bps, subframe[_best_subframe]); + + if(frame_header->blocksize >= FLAC__MAX_FIXED_ORDER) { + unsigned signal_is_constant = false; + guess_fixed_order = encoder->private_->local_fixed_compute_best_predictor(integer_signal+FLAC__MAX_FIXED_ORDER, frame_header->blocksize-FLAC__MAX_FIXED_ORDER, fixed_residual_bits_per_sample); + /* check for constant subframe */ + if( + !encoder->private_->disable_constant_subframes && +#ifndef FLAC__INTEGER_ONLY_LIBRARY + fixed_residual_bits_per_sample[1] == 0.0 +#else + fixed_residual_bits_per_sample[1] == FLAC__FP_ZERO +#endif + ) { + /* the above means it's possible all samples are the same value; now double-check it: */ + unsigned i; + signal_is_constant = true; + for(i = 1; i < frame_header->blocksize; i++) { + if(integer_signal[0] != integer_signal[i]) { + signal_is_constant = false; + break; + } + } + } + if(signal_is_constant) { + _candidate_bits = evaluate_constant_subframe_(integer_signal[0], subframe_bps, subframe[!_best_subframe]); + if(_candidate_bits < _best_bits) { + _best_subframe = !_best_subframe; + _best_bits = _candidate_bits; + } + } + else { + if(!encoder->private_->disable_fixed_subframes || (encoder->protected_->max_lpc_order == 0 && _best_bits == UINT_MAX)) { + /* encode fixed */ + if(encoder->protected_->do_exhaustive_model_search) { + min_fixed_order = 0; + max_fixed_order = FLAC__MAX_FIXED_ORDER; + } + else { + min_fixed_order = max_fixed_order = guess_fixed_order; + } + for(fixed_order = min_fixed_order; fixed_order <= max_fixed_order; fixed_order++) { +#ifndef FLAC__INTEGER_ONLY_LIBRARY + if(fixed_residual_bits_per_sample[fixed_order] >= (FLAC__float)subframe_bps) + continue; /* don't even try */ + rice_parameter = (fixed_residual_bits_per_sample[fixed_order] > 0.0)? (unsigned)(fixed_residual_bits_per_sample[fixed_order]+0.5) : 0; /* 0.5 is for rounding */ +#else + if(FLAC__fixedpoint_trunc(fixed_residual_bits_per_sample[fixed_order]) >= (int)subframe_bps) + continue; /* don't even try */ + rice_parameter = (fixed_residual_bits_per_sample[fixed_order] > FLAC__FP_ZERO)? (unsigned)FLAC__fixedpoint_trunc(fixed_residual_bits_per_sample[fixed_order]+FLAC__FP_ONE_HALF) : 0; /* 0.5 is for rounding */ +#endif +#ifndef FLAC__SYMMETRIC_RICE + rice_parameter++; /* to account for the signed->unsigned conversion during rice coding */ +#endif + if(rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) { +#ifdef DEBUG_VERBOSE + fprintf(stderr, "clipping rice_parameter (%u -> %u) @0\n", rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1); +#endif + rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1; + } + _candidate_bits = + evaluate_fixed_subframe_( + encoder, + integer_signal, + residual[!_best_subframe], + encoder->private_->abs_residual, + encoder->private_->abs_residual_partition_sums, + encoder->private_->raw_bits_per_partition, + frame_header->blocksize, + subframe_bps, + fixed_order, + rice_parameter, + min_partition_order, + max_partition_order, + precompute_partition_sums, + encoder->protected_->do_escape_coding, + encoder->protected_->rice_parameter_search_dist, + subframe[!_best_subframe], + partitioned_rice_contents[!_best_subframe] + ); + if(_candidate_bits < _best_bits) { + _best_subframe = !_best_subframe; + _best_bits = _candidate_bits; + } + } + } + +#ifndef FLAC__INTEGER_ONLY_LIBRARY + /* encode lpc */ + if(encoder->protected_->max_lpc_order > 0) { + if(encoder->protected_->max_lpc_order >= frame_header->blocksize) + max_lpc_order = frame_header->blocksize-1; + else + max_lpc_order = encoder->protected_->max_lpc_order; + if(max_lpc_order > 0) { + encoder->private_->local_lpc_compute_autocorrelation(real_signal, frame_header->blocksize, max_lpc_order+1, autoc); + /* if autoc[0] == 0.0, the signal is constant and we usually won't get here, but it can happen */ + if(autoc[0] != 0.0) { + FLAC__lpc_compute_lp_coefficients(autoc, max_lpc_order, encoder->private_->lp_coeff, lpc_error); + if(encoder->protected_->do_exhaustive_model_search) { + min_lpc_order = 1; + } + else { + unsigned guess_lpc_order = FLAC__lpc_compute_best_order(lpc_error, max_lpc_order, frame_header->blocksize, subframe_bps); + min_lpc_order = max_lpc_order = guess_lpc_order; + } + for(lpc_order = min_lpc_order; lpc_order <= max_lpc_order; lpc_order++) { + lpc_residual_bits_per_sample = FLAC__lpc_compute_expected_bits_per_residual_sample(lpc_error[lpc_order-1], frame_header->blocksize-lpc_order); + if(lpc_residual_bits_per_sample >= (FLAC__double)subframe_bps) + continue; /* don't even try */ + rice_parameter = (lpc_residual_bits_per_sample > 0.0)? (unsigned)(lpc_residual_bits_per_sample+0.5) : 0; /* 0.5 is for rounding */ +#ifndef FLAC__SYMMETRIC_RICE + rice_parameter++; /* to account for the signed->unsigned conversion during rice coding */ +#endif + if(rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) { +#ifdef DEBUG_VERBOSE + fprintf(stderr, "clipping rice_parameter (%u -> %u) @1\n", rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1); +#endif + rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1; + } + if(encoder->protected_->do_qlp_coeff_prec_search) { + min_qlp_coeff_precision = FLAC__MIN_QLP_COEFF_PRECISION; + /* ensure a 32-bit datapath throughout for 16bps or less */ + if(subframe_bps <= 16) + max_qlp_coeff_precision = min(32 - subframe_bps - lpc_order, FLAC__MAX_QLP_COEFF_PRECISION); + else + max_qlp_coeff_precision = FLAC__MAX_QLP_COEFF_PRECISION; + } + else { + min_qlp_coeff_precision = max_qlp_coeff_precision = encoder->protected_->qlp_coeff_precision; + } + for(qlp_coeff_precision = min_qlp_coeff_precision; qlp_coeff_precision <= max_qlp_coeff_precision; qlp_coeff_precision++) { + _candidate_bits = + evaluate_lpc_subframe_( + encoder, + integer_signal, + residual[!_best_subframe], + encoder->private_->abs_residual, + encoder->private_->abs_residual_partition_sums, + encoder->private_->raw_bits_per_partition, + encoder->private_->lp_coeff[lpc_order-1], + frame_header->blocksize, + subframe_bps, + lpc_order, + qlp_coeff_precision, + rice_parameter, + min_partition_order, + max_partition_order, + precompute_partition_sums, + encoder->protected_->do_escape_coding, + encoder->protected_->rice_parameter_search_dist, + subframe[!_best_subframe], + partitioned_rice_contents[!_best_subframe] + ); + if(_candidate_bits > 0) { /* if == 0, there was a problem quantizing the lpcoeffs */ + if(_candidate_bits < _best_bits) { + _best_subframe = !_best_subframe; + _best_bits = _candidate_bits; + } + } + } + } + } + } + } +#endif /* !defined FLAC__INTEGER_ONLY_LIBRARY */ + } + } + + /* under rare circumstances this can happen when all but lpc subframe types are disabled: */ + if(_best_bits == UINT_MAX) { + FLAC__ASSERT(_best_subframe == 0); + _best_bits = evaluate_verbatim_subframe_(integer_signal, frame_header->blocksize, subframe_bps, subframe[_best_subframe]); + } + + *best_subframe = _best_subframe; + *best_bits = _best_bits; + + return true; +} + +FLAC__bool add_subframe_( + FLAC__StreamEncoder *encoder, + const FLAC__FrameHeader *frame_header, + unsigned subframe_bps, + const FLAC__Subframe *subframe, + FLAC__BitBuffer *frame +) +{ + switch(subframe->type) { + case FLAC__SUBFRAME_TYPE_CONSTANT: + if(!FLAC__subframe_add_constant(&(subframe->data.constant), subframe_bps, subframe->wasted_bits, frame)) { + encoder->protected_->state = FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_ENCODING; + return false; + } + break; + case FLAC__SUBFRAME_TYPE_FIXED: + if(!FLAC__subframe_add_fixed(&(subframe->data.fixed), frame_header->blocksize - subframe->data.fixed.order, subframe_bps, subframe->wasted_bits, frame)) { + encoder->protected_->state = FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_ENCODING; + return false; + } + break; + case FLAC__SUBFRAME_TYPE_LPC: + if(!FLAC__subframe_add_lpc(&(subframe->data.lpc), frame_header->blocksize - subframe->data.lpc.order, subframe_bps, subframe->wasted_bits, frame)) { + encoder->protected_->state = FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_ENCODING; + return false; + } + break; + case FLAC__SUBFRAME_TYPE_VERBATIM: + if(!FLAC__subframe_add_verbatim(&(subframe->data.verbatim), frame_header->blocksize, subframe_bps, subframe->wasted_bits, frame)) { + encoder->protected_->state = FLAC__STREAM_ENCODER_FATAL_ERROR_WHILE_ENCODING; + return false; + } + break; + default: + FLAC__ASSERT(0); + } + + return true; +} + +unsigned evaluate_constant_subframe_( + const FLAC__int32 signal, + unsigned subframe_bps, + FLAC__Subframe *subframe +) +{ + subframe->type = FLAC__SUBFRAME_TYPE_CONSTANT; + subframe->data.constant.value = signal; + + return FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN + subframe_bps; +} + +unsigned evaluate_fixed_subframe_( + FLAC__StreamEncoder *encoder, + const FLAC__int32 signal[], + FLAC__int32 residual[], + FLAC__uint32 abs_residual[], + FLAC__uint64 abs_residual_partition_sums[], + unsigned raw_bits_per_partition[], + unsigned blocksize, + unsigned subframe_bps, + unsigned order, + unsigned rice_parameter, + unsigned min_partition_order, + unsigned max_partition_order, + FLAC__bool precompute_partition_sums, + FLAC__bool do_escape_coding, + unsigned rice_parameter_search_dist, + FLAC__Subframe *subframe, + FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents +) +{ + unsigned i, residual_bits; + const unsigned residual_samples = blocksize - order; + + FLAC__fixed_compute_residual(signal+order, residual_samples, order, residual); + + subframe->type = FLAC__SUBFRAME_TYPE_FIXED; + + subframe->data.fixed.entropy_coding_method.type = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE; + subframe->data.fixed.entropy_coding_method.data.partitioned_rice.contents = partitioned_rice_contents; + subframe->data.fixed.residual = residual; + + residual_bits = + find_best_partition_order_( + encoder->private_, + residual, + abs_residual, + abs_residual_partition_sums, + raw_bits_per_partition, + residual_samples, + order, + rice_parameter, + min_partition_order, + max_partition_order, + precompute_partition_sums, + do_escape_coding, + rice_parameter_search_dist, + &subframe->data.fixed.entropy_coding_method.data.partitioned_rice + ); + + subframe->data.fixed.order = order; + for(i = 0; i < order; i++) + subframe->data.fixed.warmup[i] = signal[i]; + + return FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN + (order * subframe_bps) + residual_bits; +} + +#ifndef FLAC__INTEGER_ONLY_LIBRARY +unsigned evaluate_lpc_subframe_( + FLAC__StreamEncoder *encoder, + const FLAC__int32 signal[], + FLAC__int32 residual[], + FLAC__uint32 abs_residual[], + FLAC__uint64 abs_residual_partition_sums[], + unsigned raw_bits_per_partition[], + const FLAC__real lp_coeff[], + unsigned blocksize, + unsigned subframe_bps, + unsigned order, + unsigned qlp_coeff_precision, + unsigned rice_parameter, + unsigned min_partition_order, + unsigned max_partition_order, + FLAC__bool precompute_partition_sums, + FLAC__bool do_escape_coding, + unsigned rice_parameter_search_dist, + FLAC__Subframe *subframe, + FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents +) +{ + FLAC__int32 qlp_coeff[FLAC__MAX_LPC_ORDER]; + unsigned i, residual_bits; + int quantization, ret; + const unsigned residual_samples = blocksize - order; + + /* try to keep qlp coeff precision such that only 32-bit math is required for decode of <=16bps streams */ + if(subframe_bps <= 16) { + FLAC__ASSERT(order > 0); + FLAC__ASSERT(order <= FLAC__MAX_LPC_ORDER); + qlp_coeff_precision = min(qlp_coeff_precision, 32 - subframe_bps - FLAC__bitmath_ilog2(order)); + } + + ret = FLAC__lpc_quantize_coefficients(lp_coeff, order, qlp_coeff_precision, qlp_coeff, &quantization); + if(ret != 0) + return 0; /* this is a hack to indicate to the caller that we can't do lp at this order on this subframe */ + + if(subframe_bps + qlp_coeff_precision + FLAC__bitmath_ilog2(order) <= 32) + if(subframe_bps <= 16 && qlp_coeff_precision <= 16) + encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit(signal+order, residual_samples, qlp_coeff, order, quantization, residual); + else + encoder->private_->local_lpc_compute_residual_from_qlp_coefficients(signal+order, residual_samples, qlp_coeff, order, quantization, residual); + else + encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_64bit(signal+order, residual_samples, qlp_coeff, order, quantization, residual); + + subframe->type = FLAC__SUBFRAME_TYPE_LPC; + + subframe->data.lpc.entropy_coding_method.type = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE; + subframe->data.lpc.entropy_coding_method.data.partitioned_rice.contents = partitioned_rice_contents; + subframe->data.lpc.residual = residual; + + residual_bits = + find_best_partition_order_( + encoder->private_, + residual, + abs_residual, + abs_residual_partition_sums, + raw_bits_per_partition, + residual_samples, + order, + rice_parameter, + min_partition_order, + max_partition_order, + precompute_partition_sums, + do_escape_coding, + rice_parameter_search_dist, + &subframe->data.fixed.entropy_coding_method.data.partitioned_rice + ); + + subframe->data.lpc.order = order; + subframe->data.lpc.qlp_coeff_precision = qlp_coeff_precision; + subframe->data.lpc.quantization_level = quantization; + memcpy(subframe->data.lpc.qlp_coeff, qlp_coeff, sizeof(FLAC__int32)*FLAC__MAX_LPC_ORDER); + for(i = 0; i < order; i++) + subframe->data.lpc.warmup[i] = signal[i]; + + return FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN + FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN + FLAC__SUBFRAME_LPC_QLP_SHIFT_LEN + (order * (qlp_coeff_precision + subframe_bps)) + residual_bits; +} +#endif + +unsigned evaluate_verbatim_subframe_( + const FLAC__int32 signal[], + unsigned blocksize, + unsigned subframe_bps, + FLAC__Subframe *subframe +) +{ + subframe->type = FLAC__SUBFRAME_TYPE_VERBATIM; + + subframe->data.verbatim.data = signal; + + return FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN + (blocksize * subframe_bps); +} + +unsigned find_best_partition_order_( + FLAC__StreamEncoderPrivate *private_, + const FLAC__int32 residual[], + FLAC__uint32 abs_residual[], + FLAC__uint64 abs_residual_partition_sums[], + unsigned raw_bits_per_partition[], + unsigned residual_samples, + unsigned predictor_order, + unsigned rice_parameter, + unsigned min_partition_order, + unsigned max_partition_order, + FLAC__bool precompute_partition_sums, + FLAC__bool do_escape_coding, + unsigned rice_parameter_search_dist, + FLAC__EntropyCodingMethod_PartitionedRice *best_partitioned_rice +) +{ + FLAC__int32 r; + unsigned residual_bits, best_residual_bits = 0; + unsigned residual_sample; + unsigned best_parameters_index = 0; + const unsigned blocksize = residual_samples + predictor_order; + + /* compute abs(residual) for use later */ + for(residual_sample = 0; residual_sample < residual_samples; residual_sample++) { + r = residual[residual_sample]; + abs_residual[residual_sample] = (FLAC__uint32)(r<0? -r : r); + } + + max_partition_order = FLAC__format_get_max_rice_partition_order_from_blocksize_limited_max_and_predictor_order(max_partition_order, blocksize, predictor_order); + min_partition_order = min(min_partition_order, max_partition_order); + + if(precompute_partition_sums) { + int partition_order; + unsigned sum; + + precompute_partition_info_sums_(abs_residual, abs_residual_partition_sums, residual_samples, predictor_order, min_partition_order, max_partition_order); + + if(do_escape_coding) + precompute_partition_info_escapes_(residual, raw_bits_per_partition, residual_samples, predictor_order, min_partition_order, max_partition_order); + + for(partition_order = (int)max_partition_order, sum = 0; partition_order >= (int)min_partition_order; partition_order--) { +#ifdef DONT_ESTIMATE_RICE_BITS + if(! + set_partitioned_rice_with_precompute_( + residual, + abs_residual_partition_sums+sum, + raw_bits_per_partition+sum, + residual_samples, + predictor_order, + rice_parameter, + rice_parameter_search_dist, + (unsigned)partition_order, + do_escape_coding, + &private_->partitioned_rice_contents_extra[!best_parameters_index], + &residual_bits + ) + ) +#else + if(! + set_partitioned_rice_with_precompute_( + abs_residual, + abs_residual_partition_sums+sum, + raw_bits_per_partition+sum, + residual_samples, + predictor_order, + rice_parameter, + rice_parameter_search_dist, + (unsigned)partition_order, + do_escape_coding, + &private_->partitioned_rice_contents_extra[!best_parameters_index], + &residual_bits + ) + ) +#endif + { + FLAC__ASSERT(best_residual_bits != 0); + break; + } + sum += 1u << partition_order; + if(best_residual_bits == 0 || residual_bits < best_residual_bits) { + best_residual_bits = residual_bits; + best_parameters_index = !best_parameters_index; + best_partitioned_rice->order = partition_order; + } + } + } + else { + unsigned partition_order; + for(partition_order = min_partition_order; partition_order <= max_partition_order; partition_order++) { +#ifdef DONT_ESTIMATE_RICE_BITS + if(! + set_partitioned_rice_( + abs_residual, + residual, + residual_samples, + predictor_order, + rice_parameter, + rice_parameter_search_dist, + partition_order, + &private_->partitioned_rice_contents_extra[!best_parameters_index], + &residual_bits + ) + ) +#else + if(! + set_partitioned_rice_( + abs_residual, + residual_samples, + predictor_order, + rice_parameter, + rice_parameter_search_dist, + partition_order, + &private_->partitioned_rice_contents_extra[!best_parameters_index], + &residual_bits + ) + ) +#endif + { + FLAC__ASSERT(best_residual_bits != 0); + break; + } + if(best_residual_bits == 0 || residual_bits < best_residual_bits) { + best_residual_bits = residual_bits; + best_parameters_index = !best_parameters_index; + best_partitioned_rice->order = partition_order; + } + } + } + + /* + * We are allowed to de-const the pointer based on our special knowledge; + * it is const to the outside world. + */ + { + FLAC__EntropyCodingMethod_PartitionedRiceContents* best_partitioned_rice_contents = (FLAC__EntropyCodingMethod_PartitionedRiceContents*)best_partitioned_rice->contents; + FLAC__format_entropy_coding_method_partitioned_rice_contents_ensure_size(best_partitioned_rice_contents, max(6, best_partitioned_rice->order)); + memcpy(best_partitioned_rice_contents->parameters, private_->partitioned_rice_contents_extra[best_parameters_index].parameters, sizeof(unsigned)*(1<<(best_partitioned_rice->order))); + memcpy(best_partitioned_rice_contents->raw_bits, private_->partitioned_rice_contents_extra[best_parameters_index].raw_bits, sizeof(unsigned)*(1<<(best_partitioned_rice->order))); + } + + return best_residual_bits; +} + +void precompute_partition_info_sums_( + const FLAC__uint32 abs_residual[], + FLAC__uint64 abs_residual_partition_sums[], + unsigned residual_samples, + unsigned predictor_order, + unsigned min_partition_order, + unsigned max_partition_order +) +{ + int partition_order; + unsigned from_partition, to_partition = 0; + const unsigned blocksize = residual_samples + predictor_order; + + /* first do max_partition_order */ + for(partition_order = (int)max_partition_order; partition_order >= 0; partition_order--) { + FLAC__uint64 abs_residual_partition_sum; + FLAC__uint32 abs_r; + unsigned partition, partition_sample, partition_samples, residual_sample; + const unsigned partitions = 1u << partition_order; + const unsigned default_partition_samples = blocksize >> partition_order; + + FLAC__ASSERT(default_partition_samples > predictor_order); + + for(partition = residual_sample = 0; partition < partitions; partition++) { + partition_samples = default_partition_samples; + if(partition == 0) + partition_samples -= predictor_order; + abs_residual_partition_sum = 0; + for(partition_sample = 0; partition_sample < partition_samples; partition_sample++) { + abs_r = abs_residual[residual_sample]; + abs_residual_partition_sum += abs_r; + residual_sample++; + } + abs_residual_partition_sums[partition] = abs_residual_partition_sum; + } + to_partition = partitions; + break; + } + + /* now merge partitions for lower orders */ + for(from_partition = 0, --partition_order; partition_order >= (int)min_partition_order; partition_order--) { + FLAC__uint64 s; + unsigned i; + const unsigned partitions = 1u << partition_order; + for(i = 0; i < partitions; i++) { + s = abs_residual_partition_sums[from_partition]; + from_partition++; + abs_residual_partition_sums[to_partition] = s + abs_residual_partition_sums[from_partition]; + from_partition++; + to_partition++; + } + } +} + +void precompute_partition_info_escapes_( + const FLAC__int32 residual[], + unsigned raw_bits_per_partition[], + unsigned residual_samples, + unsigned predictor_order, + unsigned min_partition_order, + unsigned max_partition_order +) +{ + int partition_order; + unsigned from_partition, to_partition = 0; + const unsigned blocksize = residual_samples + predictor_order; + + /* first do max_partition_order */ + for(partition_order = (int)max_partition_order; partition_order >= 0; partition_order--) { + FLAC__int32 r, residual_partition_min, residual_partition_max; + unsigned silog2_min, silog2_max; + unsigned partition, partition_sample, partition_samples, residual_sample; + const unsigned partitions = 1u << partition_order; + const unsigned default_partition_samples = blocksize >> partition_order; + + FLAC__ASSERT(default_partition_samples > predictor_order); + + for(partition = residual_sample = 0; partition < partitions; partition++) { + partition_samples = default_partition_samples; + if(partition == 0) + partition_samples -= predictor_order; + residual_partition_min = residual_partition_max = 0; + for(partition_sample = 0; partition_sample < partition_samples; partition_sample++) { + r = residual[residual_sample]; + if(r < residual_partition_min) + residual_partition_min = r; + else if(r > residual_partition_max) + residual_partition_max = r; + residual_sample++; + } + silog2_min = FLAC__bitmath_silog2(residual_partition_min); + silog2_max = FLAC__bitmath_silog2(residual_partition_max); + raw_bits_per_partition[partition] = max(silog2_min, silog2_max); + } + to_partition = partitions; + break; + } + + /* now merge partitions for lower orders */ + for(from_partition = 0, --partition_order; partition_order >= (int)min_partition_order; partition_order--) { + unsigned m; + unsigned i; + const unsigned partitions = 1u << partition_order; + for(i = 0; i < partitions; i++) { + m = raw_bits_per_partition[from_partition]; + from_partition++; + raw_bits_per_partition[to_partition] = max(m, raw_bits_per_partition[from_partition]); + from_partition++; + to_partition++; + } + } +} + +#ifdef VARIABLE_RICE_BITS +#undef VARIABLE_RICE_BITS +#endif +#ifndef DONT_ESTIMATE_RICE_BITS +#define VARIABLE_RICE_BITS(value, parameter) ((value) >> (parameter)) +#endif + +#ifdef DONT_ESTIMATE_RICE_BITS +FLAC__bool set_partitioned_rice_( + const FLAC__uint32 abs_residual[], + const FLAC__int32 residual[], + const unsigned residual_samples, + const unsigned predictor_order, + const unsigned suggested_rice_parameter, + const unsigned rice_parameter_search_dist, + const unsigned partition_order, + FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents, + unsigned *bits +) +#else +FLAC__bool set_partitioned_rice_( + const FLAC__uint32 abs_residual[], + const unsigned residual_samples, + const unsigned predictor_order, + const unsigned suggested_rice_parameter, + const unsigned rice_parameter_search_dist, + const unsigned partition_order, + FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents, + unsigned *bits +) +#endif +{ + unsigned rice_parameter, partition_bits; +#ifndef NO_RICE_SEARCH + unsigned best_partition_bits; + unsigned min_rice_parameter, max_rice_parameter, best_rice_parameter = 0; +#endif + unsigned bits_ = FLAC__ENTROPY_CODING_METHOD_TYPE_LEN + FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN; + unsigned *parameters; + + FLAC__ASSERT(suggested_rice_parameter < FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER); + + FLAC__format_entropy_coding_method_partitioned_rice_contents_ensure_size(partitioned_rice_contents, max(6, partition_order)); + parameters = partitioned_rice_contents->parameters; + + if(partition_order == 0) { + unsigned i; + +#ifndef NO_RICE_SEARCH + if(rice_parameter_search_dist) { + if(suggested_rice_parameter < rice_parameter_search_dist) + min_rice_parameter = 0; + else + min_rice_parameter = suggested_rice_parameter - rice_parameter_search_dist; + max_rice_parameter = suggested_rice_parameter + rice_parameter_search_dist; + if(max_rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) { +#ifdef DEBUG_VERBOSE + fprintf(stderr, "clipping rice_parameter (%u -> %u) @2\n", max_rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1); +#endif + max_rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1; + } + } + else + min_rice_parameter = max_rice_parameter = suggested_rice_parameter; + + best_partition_bits = 0xffffffff; + for(rice_parameter = min_rice_parameter; rice_parameter <= max_rice_parameter; rice_parameter++) { +#endif +#ifdef VARIABLE_RICE_BITS +#ifdef FLAC__SYMMETRIC_RICE + partition_bits = (2+rice_parameter) * residual_samples; +#else + const unsigned rice_parameter_estimate = rice_parameter-1; + partition_bits = (1+rice_parameter) * residual_samples; +#endif +#else + partition_bits = 0; +#endif + partition_bits += FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN; + for(i = 0; i < residual_samples; i++) { +#ifdef VARIABLE_RICE_BITS +#ifdef FLAC__SYMMETRIC_RICE + partition_bits += VARIABLE_RICE_BITS(abs_residual[i], rice_parameter); +#else + partition_bits += VARIABLE_RICE_BITS(abs_residual[i], rice_parameter_estimate); +#endif +#else + partition_bits += FLAC__bitbuffer_rice_bits(residual[i], rice_parameter); /* NOTE: we will need to pass in residual[] in addition to abs_residual[] */ +#endif + } +#ifndef NO_RICE_SEARCH + if(partition_bits < best_partition_bits) { + best_rice_parameter = rice_parameter; + best_partition_bits = partition_bits; + } + } +#endif + parameters[0] = best_rice_parameter; + bits_ += best_partition_bits; + } + else { + unsigned partition, residual_sample, save_residual_sample, partition_sample; + unsigned partition_samples; + FLAC__uint64 mean, k; + const unsigned partitions = 1u << partition_order; + for(partition = residual_sample = 0; partition < partitions; partition++) { + partition_samples = (residual_samples+predictor_order) >> partition_order; + if(partition == 0) { + if(partition_samples <= predictor_order) + return false; + else + partition_samples -= predictor_order; + } + mean = 0; + save_residual_sample = residual_sample; + for(partition_sample = 0; partition_sample < partition_samples; residual_sample++, partition_sample++) + mean += abs_residual[residual_sample]; + residual_sample = save_residual_sample; +#ifdef FLAC__SYMMETRIC_RICE + mean += partition_samples >> 1; /* for rounding effect */ + mean /= partition_samples; + + /* calc rice_parameter = floor(log2(mean)) */ + rice_parameter = 0; + mean>>=1; + while(mean) { + rice_parameter++; + mean >>= 1; + } +#else + /* we are basically calculating the size in bits of the + * average residual magnitude in the partition: + * rice_parameter = floor(log2(mean/partition_samples)) + * 'mean' is not a good name for the variable, it is + * actually the sum of magnitudes of all residual values + * in the partition, so the actual mean is + * mean/partition_samples + */ + for(rice_parameter = 0, k = partition_samples; k < mean; rice_parameter++, k <<= 1) + ; +#endif + if(rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) { +#ifdef DEBUG_VERBOSE + fprintf(stderr, "clipping rice_parameter (%u -> %u) @3\n", rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1); +#endif + rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1; + } + +#ifndef NO_RICE_SEARCH + if(rice_parameter_search_dist) { + if(rice_parameter < rice_parameter_search_dist) + min_rice_parameter = 0; + else + min_rice_parameter = rice_parameter - rice_parameter_search_dist; + max_rice_parameter = rice_parameter + rice_parameter_search_dist; + if(max_rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) { +#ifdef DEBUG_VERBOSE + fprintf(stderr, "clipping rice_parameter (%u -> %u) @4\n", max_rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1); +#endif + max_rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1; + } + } + else + min_rice_parameter = max_rice_parameter = rice_parameter; + + best_partition_bits = 0xffffffff; + for(rice_parameter = min_rice_parameter; rice_parameter <= max_rice_parameter; rice_parameter++) { +#endif +#ifdef VARIABLE_RICE_BITS +#ifdef FLAC__SYMMETRIC_RICE + partition_bits = (2+rice_parameter) * partition_samples; +#else + const unsigned rice_parameter_estimate = rice_parameter-1; + partition_bits = (1+rice_parameter) * partition_samples; +#endif +#else + partition_bits = 0; +#endif + partition_bits += FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN; + save_residual_sample = residual_sample; + for(partition_sample = 0; partition_sample < partition_samples; residual_sample++, partition_sample++) { +#ifdef VARIABLE_RICE_BITS +#ifdef FLAC__SYMMETRIC_RICE + partition_bits += VARIABLE_RICE_BITS(abs_residual[residual_sample], rice_parameter); +#else + partition_bits += VARIABLE_RICE_BITS(abs_residual[residual_sample], rice_parameter_estimate); +#endif +#else + partition_bits += FLAC__bitbuffer_rice_bits(residual[residual_sample], rice_parameter); /* NOTE: we will need to pass in residual[] in addition to abs_residual[] */ +#endif + } +#ifndef NO_RICE_SEARCH + if(rice_parameter != max_rice_parameter) + residual_sample = save_residual_sample; + if(partition_bits < best_partition_bits) { + best_rice_parameter = rice_parameter; + best_partition_bits = partition_bits; + } + } +#endif + parameters[partition] = best_rice_parameter; + bits_ += best_partition_bits; + } + } + + *bits = bits_; + return true; +} + +#ifdef DONT_ESTIMATE_RICE_BITS +FLAC__bool set_partitioned_rice_with_precompute_( + const FLAC__int32 residual[], + const FLAC__uint64 abs_residual_partition_sums[], + const unsigned raw_bits_per_partition[], + const unsigned residual_samples, + const unsigned predictor_order, + const unsigned suggested_rice_parameter, + const unsigned rice_parameter_search_dist, + const unsigned partition_order, + const FLAC__bool search_for_escapes, + FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents, + unsigned *bits +) +#else +FLAC__bool set_partitioned_rice_with_precompute_( + const FLAC__uint32 abs_residual[], + const FLAC__uint64 abs_residual_partition_sums[], + const unsigned raw_bits_per_partition[], + const unsigned residual_samples, + const unsigned predictor_order, + const unsigned suggested_rice_parameter, + const unsigned rice_parameter_search_dist, + const unsigned partition_order, + const FLAC__bool search_for_escapes, + FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents, + unsigned *bits +) +#endif +{ + unsigned rice_parameter, partition_bits; +#ifndef NO_RICE_SEARCH + unsigned best_partition_bits; + unsigned min_rice_parameter, max_rice_parameter, best_rice_parameter = 0; +#endif + unsigned flat_bits; + unsigned bits_ = FLAC__ENTROPY_CODING_METHOD_TYPE_LEN + FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN; + unsigned *parameters, *raw_bits; + + FLAC__ASSERT(suggested_rice_parameter < FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER); + + FLAC__format_entropy_coding_method_partitioned_rice_contents_ensure_size(partitioned_rice_contents, max(6, partition_order)); + parameters = partitioned_rice_contents->parameters; + raw_bits = partitioned_rice_contents->raw_bits; + + if(partition_order == 0) { + unsigned i; + +#ifndef NO_RICE_SEARCH + if(rice_parameter_search_dist) { + if(suggested_rice_parameter < rice_parameter_search_dist) + min_rice_parameter = 0; + else + min_rice_parameter = suggested_rice_parameter - rice_parameter_search_dist; + max_rice_parameter = suggested_rice_parameter + rice_parameter_search_dist; + if(max_rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) { +#ifdef DEBUG_VERBOSE + fprintf(stderr, "clipping rice_parameter (%u -> %u) @5\n", max_rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1); +#endif + max_rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1; + } + } + else + min_rice_parameter = max_rice_parameter = suggested_rice_parameter; + + best_partition_bits = 0xffffffff; + for(rice_parameter = min_rice_parameter; rice_parameter <= max_rice_parameter; rice_parameter++) { +#endif +#ifdef VARIABLE_RICE_BITS +#ifdef FLAC__SYMMETRIC_RICE + partition_bits = (2+rice_parameter) * residual_samples; +#else + const unsigned rice_parameter_estimate = rice_parameter-1; + partition_bits = (1+rice_parameter) * residual_samples; +#endif +#else + partition_bits = 0; +#endif + partition_bits += FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN; + for(i = 0; i < residual_samples; i++) { +#ifdef VARIABLE_RICE_BITS +#ifdef FLAC__SYMMETRIC_RICE + partition_bits += VARIABLE_RICE_BITS(abs_residual[i], rice_parameter); +#else + partition_bits += VARIABLE_RICE_BITS(abs_residual[i], rice_parameter_estimate); +#endif +#else + partition_bits += FLAC__bitbuffer_rice_bits(residual[i], rice_parameter); /* NOTE: we will need to pass in residual[] instead of abs_residual[] */ +#endif + } +#ifndef NO_RICE_SEARCH + if(partition_bits < best_partition_bits) { + best_rice_parameter = rice_parameter; + best_partition_bits = partition_bits; + } + } +#endif + if(search_for_escapes) { + flat_bits = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN + FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN + raw_bits_per_partition[0] * residual_samples; + if(flat_bits <= best_partition_bits) { + raw_bits[0] = raw_bits_per_partition[0]; + best_rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER; + best_partition_bits = flat_bits; + } + } + parameters[0] = best_rice_parameter; + bits_ += best_partition_bits; + } + else { + unsigned partition, residual_sample, save_residual_sample, partition_sample; + unsigned partition_samples; + FLAC__uint64 mean, k; + const unsigned partitions = 1u << partition_order; + for(partition = residual_sample = 0; partition < partitions; partition++) { + partition_samples = (residual_samples+predictor_order) >> partition_order; + if(partition == 0) { + if(partition_samples <= predictor_order) + return false; + else + partition_samples -= predictor_order; + } + mean = abs_residual_partition_sums[partition]; +#ifdef FLAC__SYMMETRIC_RICE + mean += partition_samples >> 1; /* for rounding effect */ + mean /= partition_samples; + + /* calc rice_parameter = floor(log2(mean)) */ + rice_parameter = 0; + mean>>=1; + while(mean) { + rice_parameter++; + mean >>= 1; + } +#else + /* we are basically calculating the size in bits of the + * average residual magnitude in the partition: + * rice_parameter = floor(log2(mean/partition_samples)) + * 'mean' is not a good name for the variable, it is + * actually the sum of magnitudes of all residual values + * in the partition, so the actual mean is + * mean/partition_samples + */ + for(rice_parameter = 0, k = partition_samples; k < mean; rice_parameter++, k <<= 1) + ; +#endif + if(rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) { +#ifdef DEBUG_VERBOSE + fprintf(stderr, "clipping rice_parameter (%u -> %u) @6\n", rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1); +#endif + rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1; + } + +#ifndef NO_RICE_SEARCH + if(rice_parameter_search_dist) { + if(rice_parameter < rice_parameter_search_dist) + min_rice_parameter = 0; + else + min_rice_parameter = rice_parameter - rice_parameter_search_dist; + max_rice_parameter = rice_parameter + rice_parameter_search_dist; + if(max_rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) { +#ifdef DEBUG_VERBOSE + fprintf(stderr, "clipping rice_parameter (%u -> %u) @7\n", max_rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1); +#endif + max_rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1; + } + } + else + min_rice_parameter = max_rice_parameter = rice_parameter; + + best_partition_bits = 0xffffffff; + for(rice_parameter = min_rice_parameter; rice_parameter <= max_rice_parameter; rice_parameter++) { +#endif +#ifdef VARIABLE_RICE_BITS +#ifdef FLAC__SYMMETRIC_RICE + partition_bits = (2+rice_parameter) * partition_samples; +#else + const unsigned rice_parameter_estimate = rice_parameter-1; + partition_bits = (1+rice_parameter) * partition_samples; +#endif +#else + partition_bits = 0; +#endif + partition_bits += FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN; + save_residual_sample = residual_sample; + for(partition_sample = 0; partition_sample < partition_samples; residual_sample++, partition_sample++) { +#ifdef VARIABLE_RICE_BITS +#ifdef FLAC__SYMMETRIC_RICE + partition_bits += VARIABLE_RICE_BITS(abs_residual[residual_sample], rice_parameter); +#else + partition_bits += VARIABLE_RICE_BITS(abs_residual[residual_sample], rice_parameter_estimate); +#endif +#else + partition_bits += FLAC__bitbuffer_rice_bits(residual[residual_sample], rice_parameter); /* NOTE: we will need to pass in residual[] instead of abs_residual[] */ +#endif + } +#ifndef NO_RICE_SEARCH + if(rice_parameter != max_rice_parameter) + residual_sample = save_residual_sample; + if(partition_bits < best_partition_bits) { + best_rice_parameter = rice_parameter; + best_partition_bits = partition_bits; + } + } +#endif + if(search_for_escapes) { + flat_bits = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN + FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN + raw_bits_per_partition[partition] * partition_samples; + if(flat_bits <= best_partition_bits) { + raw_bits[partition] = raw_bits_per_partition[partition]; + best_rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER; + best_partition_bits = flat_bits; + } + } + parameters[partition] = best_rice_parameter; + bits_ += best_partition_bits; + } + } + + *bits = bits_; + return true; +} + +unsigned get_wasted_bits_(FLAC__int32 signal[], unsigned samples) +{ + unsigned i, shift; + FLAC__int32 x = 0; + + for(i = 0; i < samples && !(x&1); i++) + x |= signal[i]; + + if(x == 0) { + shift = 0; + } + else { + for(shift = 0; !(x&1); shift++) + x >>= 1; + } + + if(shift > 0) { + for(i = 0; i < samples; i++) + signal[i] >>= shift; + } + + return shift; +} + +void append_to_verify_fifo_(verify_input_fifo *fifo, const FLAC__int32 * const input[], unsigned input_offset, unsigned channels, unsigned wide_samples) +{ + unsigned channel; + + for(channel = 0; channel < channels; channel++) + memcpy(&fifo->data[channel][fifo->tail], &input[channel][input_offset], sizeof(FLAC__int32) * wide_samples); + + fifo->tail += wide_samples; + + FLAC__ASSERT(fifo->tail <= fifo->size); +} + +void append_to_verify_fifo_interleaved_(verify_input_fifo *fifo, const FLAC__int32 input[], unsigned input_offset, unsigned channels, unsigned wide_samples) +{ + unsigned channel; + unsigned sample, wide_sample; + unsigned tail = fifo->tail; + + sample = input_offset * channels; + for(wide_sample = 0; wide_sample < wide_samples; wide_sample++) { + for(channel = 0; channel < channels; channel++) + fifo->data[channel][tail] = input[sample++]; + tail++; + } + fifo->tail = tail; + + FLAC__ASSERT(fifo->tail <= fifo->size); +} + +FLAC__StreamDecoderReadStatus verify_read_callback_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], unsigned *bytes, void *client_data) +{ + FLAC__StreamEncoder *encoder = (FLAC__StreamEncoder*)client_data; + const unsigned encoded_bytes = encoder->private_->verify.output.bytes; + (void)decoder; + + if(encoder->private_->verify.needs_magic_hack) { + FLAC__ASSERT(*bytes >= FLAC__STREAM_SYNC_LENGTH); + *bytes = FLAC__STREAM_SYNC_LENGTH; + memcpy(buffer, FLAC__STREAM_SYNC_STRING, *bytes); + encoder->private_->verify.needs_magic_hack = false; + } + else { + if(encoded_bytes == 0) { + /* + * If we get here, a FIFO underflow has occurred, + * which means there is a bug somewhere. + */ + FLAC__ASSERT(0); + return FLAC__STREAM_DECODER_READ_STATUS_ABORT; + } + else if(encoded_bytes < *bytes) + *bytes = encoded_bytes; + memcpy(buffer, encoder->private_->verify.output.data, *bytes); + encoder->private_->verify.output.data += *bytes; + encoder->private_->verify.output.bytes -= *bytes; + } + + return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE; +} + +FLAC__StreamDecoderWriteStatus verify_write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data) +{ + FLAC__StreamEncoder *encoder = (FLAC__StreamEncoder *)client_data; + unsigned channel; + const unsigned channels = FLAC__stream_decoder_get_channels(decoder); + const unsigned blocksize = frame->header.blocksize; + const unsigned bytes_per_block = sizeof(FLAC__int32) * blocksize; + + for(channel = 0; channel < channels; channel++) { + if(0 != memcmp(buffer[channel], encoder->private_->verify.input_fifo.data[channel], bytes_per_block)) { + unsigned i, sample = 0; + FLAC__int32 expect = 0, got = 0; + + for(i = 0; i < blocksize; i++) { + if(buffer[channel][i] != encoder->private_->verify.input_fifo.data[channel][i]) { + sample = i; + expect = (FLAC__int32)encoder->private_->verify.input_fifo.data[channel][i]; + got = (FLAC__int32)buffer[channel][i]; + break; + } + } + FLAC__ASSERT(i < blocksize); + FLAC__ASSERT(frame->header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER); + encoder->private_->verify.error_stats.absolute_sample = frame->header.number.sample_number + sample; + encoder->private_->verify.error_stats.frame_number = (unsigned)(frame->header.number.sample_number / blocksize); + encoder->private_->verify.error_stats.channel = channel; + encoder->private_->verify.error_stats.sample = sample; + encoder->private_->verify.error_stats.expected = expect; + encoder->private_->verify.error_stats.got = got; + encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA; + return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT; + } + } + /* dequeue the frame from the fifo */ + for(channel = 0; channel < channels; channel++) { + memmove(&encoder->private_->verify.input_fifo.data[channel][0], &encoder->private_->verify.input_fifo.data[channel][blocksize], encoder->private_->verify.input_fifo.tail - blocksize); + } + encoder->private_->verify.input_fifo.tail -= blocksize; + return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE; +} + +void verify_metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data) +{ + (void)decoder, (void)metadata, (void)client_data; +} + +void verify_error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data) +{ + FLAC__StreamEncoder *encoder = (FLAC__StreamEncoder*)client_data; + (void)decoder, (void)status; + encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR; +} -- cgit v1.2.3