1 files changed, 386 insertions, 0 deletions

diff --git a/lib/rbcodec/codecs/wav_enc.c b/lib/rbcodec/codecs/wav_enc.c
new file mode 100644
index 0000000000..e4afeaf93c
--- /dev/null
+++ b/lib/rbcodec/codecs/wav_enc.c
@@ -0,0 +1,386 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2006 Antonius Hellmann
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include <inttypes.h>
+#include "codeclib.h"
+
+CODEC_ENC_HEADER
+
+struct riff_header
+{
+    uint8_t  riff_id[4];      /* 00h - "RIFF"                            */
+    uint32_t riff_size;       /* 04h - sz following headers + data_size  */
+    /* format header */
+    uint8_t  format[4];       /* 08h - "WAVE"                            */
+    uint8_t  format_id[4];    /* 0Ch - "fmt "                            */
+    uint32_t format_size;     /* 10h - 16 for PCM (sz format data)       */
+    /* format data */
+    uint16_t audio_format;    /* 14h - 1=PCM                             */
+    uint16_t num_channels;    /* 16h - 1=M, 2=S, etc.                    */
+    uint32_t sample_rate;     /* 18h - HZ                                */
+    uint32_t byte_rate;       /* 1Ch - num_channels*sample_rate*bits_per_sample/8 */
+    uint16_t block_align;     /* 20h - num_channels*bits_per_samples/8   */
+    uint16_t bits_per_sample; /* 22h - 8=8 bits, 16=16 bits, etc.        */
+    /* Not for audio_format=1 (PCM) */
+/*  unsigned short extra_param_size;   24h - size of extra data          */ 
+/*  unsigned char  *extra_params; */
+    /* data header */
+    uint8_t  data_id[4];      /* 24h - "data" */
+    uint32_t data_size;       /* 28h - num_samples*num_channels*bits_per_sample/8 */
+/*  unsigned char  *data;              2ch - actual sound data */
+} __attribute__((packed));
+
+#define RIFF_FMT_HEADER_SIZE       12 /* format -> format_size */
+#define RIFF_FMT_DATA_SIZE         16 /* audio_format -> bits_per_sample */
+#define RIFF_DATA_HEADER_SIZE       8 /* data_id -> data_size */
+
+#define PCM_DEPTH_BYTES             2
+#define PCM_DEPTH_BITS             16
+#define PCM_SAMP_PER_CHUNK       2048
+#define PCM_CHUNK_SIZE          (PCM_SAMP_PER_CHUNK*4)
+
+static int      num_channels IBSS_ATTR;
+static int      rec_mono_mode IBSS_ATTR;
+static uint32_t sample_rate;
+static uint32_t enc_size;
+static int32_t  err          IBSS_ATTR;
+
+static const struct riff_header riff_header =
+{
+    /* "RIFF" header */
+    { 'R', 'I', 'F', 'F' },         /* riff_id          */
+    0,                              /* riff_size   (*)  */
+    /* format header */ 
+    { 'W', 'A', 'V', 'E' },         /* format           */
+    { 'f', 'm', 't', ' ' },         /* format_id        */
+    htole32(16),                    /* format_size      */
+    /* format data */
+    htole16(1),                     /* audio_format     */
+    0,                              /* num_channels (*) */
+    0,                              /* sample_rate  (*) */
+    0,                              /* byte_rate    (*) */
+    0,                              /* block_align  (*) */
+    htole16(PCM_DEPTH_BITS),        /* bits_per_sample  */
+    /* data header */
+    { 'd', 'a', 't', 'a' },         /* data_id          */
+    0                               /* data_size    (*) */
+    /* (*) updated during ENC_END_FILE event */
+};
+
+/* called version often - inline */
+static inline bool is_file_data_ok(struct enc_file_event_data *data) ICODE_ATTR;
+static inline bool is_file_data_ok(struct enc_file_event_data *data)
+{
+    return data->rec_file >= 0 && (long)data->chunk->flags >= 0;
+} /* is_file_data_ok */
+
+/* called version often - inline */
+static inline bool on_write_chunk(struct enc_file_event_data *data) ICODE_ATTR;
+static inline bool on_write_chunk(struct enc_file_event_data *data)
+{
+    if (!is_file_data_ok(data))
+        return false;
+
+    if (data->chunk->enc_data == NULL)
+    {
+#ifdef ROCKBOX_HAS_LOGF
+        ci->logf("wav enc: NULL data");
+#endif
+        return true;
+    }
+
+    if (ci->write(data->rec_file, data->chunk->enc_data,
+                  data->chunk->enc_size) != (ssize_t)data->chunk->enc_size)
+        return false;
+
+    data->num_pcm_samples += data->chunk->num_pcm;
+    return true;
+} /* on_write_chunk */
+
+static bool on_start_file(struct enc_file_event_data *data)
+{
+    if ((data->chunk->flags & CHUNKF_ERROR) || *data->filename == '\0')
+        return false;
+
+    data->rec_file = ci->open(data->filename, O_RDWR|O_CREAT|O_TRUNC, 0666);
+
+    if (data->rec_file < 0)
+        return false;
+
+    /* reset sample count */
+    data->num_pcm_samples = 0;
+
+    /* write template header */
+    if (ci->write(data->rec_file, &riff_header, sizeof (riff_header))
+            != sizeof (riff_header))
+    {
+        return false;
+    }
+
+    data->new_enc_size += sizeof (riff_header);
+    return true;
+} /* on_start_file */
+
+static bool on_end_file(struct enc_file_event_data *data)
+{
+    /* update template header */
+    struct riff_header hdr;
+    uint32_t data_size;
+
+    if (data->rec_file < 0)
+        return false; /* file already closed, nothing more we can do */
+
+    /* always _try_ to write the file header, even on error */
+    if ((ci->lseek(data->rec_file, 0, SEEK_SET)) ||
+        (ci->read(data->rec_file, &hdr, sizeof (hdr)) != sizeof (hdr)))
+    {
+        return false;
+    }
+
+    data_size = data->num_pcm_samples*num_channels*PCM_DEPTH_BYTES;
+
+    /* "RIFF" header */
+    hdr.riff_size    = htole32(RIFF_FMT_HEADER_SIZE + RIFF_FMT_DATA_SIZE
+                               + RIFF_DATA_HEADER_SIZE + data_size);
+
+    /* format data */
+    hdr.num_channels = htole16(num_channels);
+    hdr.sample_rate  = htole32(sample_rate);
+    hdr.byte_rate    = htole32(sample_rate*num_channels* PCM_DEPTH_BYTES);
+    hdr.block_align  = htole16(num_channels*PCM_DEPTH_BYTES);
+
+    /* data header */
+    hdr.data_size    = htole32(data_size);
+
+    if (ci->lseek(data->rec_file, 0, SEEK_SET) != 0 ||
+        ci->write(data->rec_file, &hdr, sizeof (hdr)) != sizeof (hdr) ||
+        ci->close(data->rec_file) != 0)
+    {
+        return false;
+    }
+
+    data->rec_file = -1;
+
+    return true;
+} /* on_end_file */
+
+STATICIRAM void enc_events_callback(enum enc_events event, void *data)
+                                    ICODE_ATTR;
+STATICIRAM void enc_events_callback(enum enc_events event, void *data)
+{
+    switch (event)
+    {
+    case ENC_WRITE_CHUNK:
+        if (on_write_chunk((struct enc_file_event_data *)data))
+            return;
+
+        break;
+
+    case ENC_START_FILE:
+        if (on_start_file((struct enc_file_event_data *)data))
+            return;
+
+        break;
+
+    case ENC_END_FILE:
+        if (on_end_file((struct enc_file_event_data *)data))
+            return;
+
+        break;
+
+    default:
+        return;
+    }
+
+    /* Something failed above. Signal error back to core. */
+    ((struct enc_file_event_data *)data)->chunk->flags |= CHUNKF_ERROR;
+} /* enc_events_callback */
+
+/* convert native pcm samples to wav format samples */
+static inline void sample_to_mono(uint32_t **src, uint32_t **dst)
+{
+    int32_t lr1, lr2;
+
+    switch(rec_mono_mode)
+    {
+        case 1:
+            /* mono = L */
+            lr1 = *(*src)++;
+            lr1 = lr1 >> 16;
+            lr2 = *(*src)++;
+            lr2 = lr2 >> 16;
+            break;
+        case 2:
+            /* mono = R */
+            lr1 = *(*src)++;
+            lr1 = (uint16_t)lr1;
+            lr2 = *(*src)++;
+            lr2 = (uint16_t)lr2;
+            break;
+        case 0:
+        default:
+            /* mono = (L+R)/2 */
+            lr1 = *(*src)++;
+            lr1 = (int16_t)lr1 + (lr1 >> 16) + err;
+            err = lr1 & 1;
+            lr1 >>= 1;
+
+            lr2 = *(*src)++;
+            lr2 = (int16_t)lr2 + (lr2 >> 16) + err;
+            err = lr2 & 1;
+            lr2 >>= 1;
+            break;
+    }
+    *(*dst)++ = htole32((lr2 << 16) | (uint16_t)lr1);
+} /* sample_to_mono */
+
+STATICIRAM void chunk_to_wav_format(uint32_t *src, uint32_t *dst) ICODE_ATTR;
+STATICIRAM void chunk_to_wav_format(uint32_t *src, uint32_t *dst)
+{
+    if (num_channels == 1)
+    {
+        /* On big endian:
+         *  |LLLLLLLLllllllll|RRRRRRRRrrrrrrrr|
+         *  |LLLLLLLLllllllll|RRRRRRRRrrrrrrrr| =>
+         *  |mmmmmmmmMMMMMMMM|mmmmmmmmMMMMMMMM|
+         *
+         * On little endian:
+         *  |llllllllLLLLLLLL|rrrrrrrrRRRRRRRR|
+         *  |llllllllLLLLLLLL|rrrrrrrrRRRRRRRR| =>
+         *  |mmmmmmmmMMMMMMMM|mmmmmmmmMMMMMMMM|
+         */
+        uint32_t *src_end = src + PCM_SAMP_PER_CHUNK;
+
+        do
+        {
+            sample_to_mono(&src, &dst);
+            sample_to_mono(&src, &dst);
+            sample_to_mono(&src, &dst);
+            sample_to_mono(&src, &dst);
+            sample_to_mono(&src, &dst);
+            sample_to_mono(&src, &dst);
+            sample_to_mono(&src, &dst);
+            sample_to_mono(&src, &dst);
+        }
+        while (src < src_end);
+    }
+    else
+    {
+#ifdef ROCKBOX_BIG_ENDIAN
+        /*  |LLLLLLLLllllllll|RRRRRRRRrrrrrrrr| =>
+         *  |llllllllLLLLLLLL|rrrrrrrrRRRRRRRR|
+         */
+        uint32_t *src_end = src + PCM_SAMP_PER_CHUNK;
+
+        do
+        {
+            *dst++ = swap_odd_even32(*src++);
+            *dst++ = swap_odd_even32(*src++);
+            *dst++ = swap_odd_even32(*src++);
+            *dst++ = swap_odd_even32(*src++);
+            *dst++ = swap_odd_even32(*src++);
+            *dst++ = swap_odd_even32(*src++);
+            *dst++ = swap_odd_even32(*src++);
+            *dst++ = swap_odd_even32(*src++);
+        }
+        while (src < src_end);
+#else
+        /*  |llllllllLLLLLLLL|rrrrrrrrRRRRRRRR| =>
+         *  |llllllllLLLLLLLL|rrrrrrrrRRRRRRRR|
+         */
+        ci->memcpy(dst, src, PCM_CHUNK_SIZE);
+#endif
+    }
+} /* chunk_to_wav_format */
+
+static bool init_encoder(void)
+{
+    struct enc_inputs     inputs;
+    struct enc_parameters params;
+
+    if (ci->enc_get_inputs         == NULL ||
+        ci->enc_set_parameters     == NULL ||
+        ci->enc_get_chunk          == NULL ||
+        ci->enc_finish_chunk       == NULL ||
+        ci->enc_get_pcm_data       == NULL )
+        return false;
+
+    ci->enc_get_inputs(&inputs);
+
+    if (inputs.config->afmt != AFMT_PCM_WAV)
+        return false;
+
+    sample_rate  = inputs.sample_rate;
+    num_channels = inputs.num_channels;
+    rec_mono_mode = inputs.rec_mono_mode;
+    err          = 0;
+
+    /* configure the buffer system */
+    params.afmt            = AFMT_PCM_WAV;
+    enc_size               = PCM_CHUNK_SIZE*inputs.num_channels / 2;
+    params.chunk_size      = enc_size;
+    params.enc_sample_rate = sample_rate;
+    params.reserve_bytes   = 0;
+    params.events_callback = enc_events_callback;
+    ci->enc_set_parameters(&params);
+
+    return true;
+} /* init_encoder */
+
+/* this is the codec entry point */
+enum codec_status codec_main(enum codec_entry_call_reason reason)
+{
+    if (reason == CODEC_LOAD) {
+        if (!init_encoder())
+            return CODEC_ERROR;
+    }
+    else if (reason == CODEC_UNLOAD) {
+        /* reset parameters to initial state */
+        ci->enc_set_parameters(NULL);
+    }
+
+    return CODEC_OK;
+}
+
+/* this is called for each file to process */
+enum codec_status codec_run(void)
+{
+    /* main encoding loop */
+    while(ci->get_command(NULL) != CODEC_ACTION_HALT)
+    {
+        uint32_t *src = (uint32_t *)ci->enc_get_pcm_data(PCM_CHUNK_SIZE);
+        struct enc_chunk_hdr *chunk;
+
+        if(src == NULL)
+            continue;
+
+        chunk           = ci->enc_get_chunk();
+        chunk->enc_size = enc_size;
+        chunk->num_pcm  = PCM_SAMP_PER_CHUNK;
+        chunk->enc_data = ENC_CHUNK_SKIP_HDR(chunk->enc_data, chunk);
+
+        chunk_to_wav_format(src, (uint32_t *)chunk->enc_data);
+
+        ci->enc_finish_chunk();
+    }
+
+    return CODEC_OK;
+}