From f40bfc9267b13b54e6379dfe7539447662879d24 Mon Sep 17 00:00:00 2001 From: Sean Bartell Date: Sat, 25 Jun 2011 21:32:25 -0400 Subject: Add codecs to librbcodec. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97 Reviewed-on: http://gerrit.rockbox.org/137 Reviewed-by: Nils Wallménius Tested-by: Nils Wallménius --- lib/rbcodec/codecs/aiff.c | 350 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 350 insertions(+) create mode 100644 lib/rbcodec/codecs/aiff.c (limited to 'lib/rbcodec/codecs/aiff.c') diff --git a/lib/rbcodec/codecs/aiff.c b/lib/rbcodec/codecs/aiff.c new file mode 100644 index 0000000000..333bcd0455 --- /dev/null +++ b/lib/rbcodec/codecs/aiff.c @@ -0,0 +1,350 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id$ + * + * Copyright (c) 2005 Jvo Studer + * Copyright (c) 2009 Yoshihisa Uchida + * + * 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 "codeclib.h" +#include "codecs/libpcm/support_formats.h" + +CODEC_HEADER + +#define FOURCC(c1, c2, c3, c4) \ +((((uint32_t)c1)<<24)|(((uint32_t)c2)<<16)|(((uint32_t)c3)<<8)|((uint32_t)c4)) + +/* This codec supports the following AIFC compressionType formats */ +enum { + AIFC_FORMAT_PCM = FOURCC('N', 'O', 'N', 'E'), /* AIFC PCM Format (big endian) */ + AIFC_FORMAT_ALAW = FOURCC('a', 'l', 'a', 'w'), /* AIFC ALaw compressed */ + AIFC_FORMAT_MULAW = FOURCC('u', 'l', 'a', 'w'), /* AIFC uLaw compressed */ + AIFC_FORMAT_IEEE_FLOAT32 = FOURCC('f', 'l', '3', '2'), /* AIFC IEEE float 32 bit */ + AIFC_FORMAT_IEEE_FLOAT64 = FOURCC('f', 'l', '6', '4'), /* AIFC IEEE float 64 bit */ + AIFC_FORMAT_QT_IMA_ADPCM = FOURCC('i', 'm', 'a', '4'), /* AIFC QuickTime IMA ADPCM */ +}; + +static const struct pcm_entry pcm_codecs[] = { + { AIFC_FORMAT_PCM, get_linear_pcm_codec }, + { AIFC_FORMAT_ALAW, get_itut_g711_alaw_codec }, + { AIFC_FORMAT_MULAW, get_itut_g711_mulaw_codec }, + { AIFC_FORMAT_IEEE_FLOAT32, get_ieee_float_codec }, + { AIFC_FORMAT_IEEE_FLOAT64, get_ieee_float_codec }, + { AIFC_FORMAT_QT_IMA_ADPCM, get_qt_ima_adpcm_codec }, +}; + +#define PCM_SAMPLE_SIZE (1024*2) + +static int32_t samples[PCM_SAMPLE_SIZE] IBSS_ATTR; + +static const struct pcm_codec *get_codec(uint32_t formattag) +{ + unsigned i; + for (i = 0; i < sizeof(pcm_codecs)/sizeof(pcm_codecs[0]); i++) + if (pcm_codecs[i].format_tag == formattag) + return pcm_codecs[i].get_codec(); + + return NULL; +} + +/* this is the codec entry point */ +enum codec_status codec_main(enum codec_entry_call_reason reason) +{ + if (reason == CODEC_LOAD) { + /* Generic codec initialisation */ + ci->configure(DSP_SET_SAMPLE_DEPTH, PCM_OUTPUT_DEPTH-1); + } + + return CODEC_OK; +} + +/* this is called for each file to process */ +enum codec_status codec_run(void) +{ + struct pcm_format format; + uint32_t bytesdone, decodedsamples; + /* rockbox: comment 'set but unused' variables + uint32_t num_sample_frames = 0; + */ + size_t n; + int bufcount; + int endofstream; + unsigned char *buf; + uint8_t *aifbuf; + uint32_t offset2snd = 0; + off_t firstblockposn; /* position of the first block in file */ + bool is_aifc = false; + const struct pcm_codec *codec; + uint32_t size; + intptr_t param; + + if (codec_init()) { + return CODEC_ERROR; + } + + codec_set_replaygain(ci->id3); + + /* Need to save offset for later use (cleared indirectly by advance_buffer) */ + bytesdone = ci->id3->offset; + + /* assume the AIFF header is less than 1024 bytes */ + ci->seek_buffer(0); + buf = ci->request_buffer(&n, 1024); + if (n < 54) { + return CODEC_ERROR; + } + + if (memcmp(buf, "FORM", 4) != 0) + { + DEBUGF("CODEC_ERROR: does not aiff format %4.4s\n", (char*)&buf[0]); + return CODEC_ERROR; + } + if (memcmp(&buf[8], "AIFF", 4) == 0) + is_aifc = false; + else if (memcmp(&buf[8], "AIFC", 4) == 0) + is_aifc = true; + else + { + DEBUGF("CODEC_ERROR: does not aiff format %4.4s\n", (char*)&buf[8]); + return CODEC_ERROR; + } + + buf += 12; + n -= 12; + + ci->memset(&format, 0, sizeof(struct pcm_format)); + format.is_signed = true; + format.is_little_endian = false; + + decodedsamples = 0; + codec = 0; + + /* read until 'SSND' chunk, which typically is last */ + while (format.numbytes == 0 && n >= 8) + { + /* chunkSize */ + size = ((buf[4]<<24)|(buf[5]<<16)|(buf[6]<<8)|buf[7]); + if (memcmp(buf, "COMM", 4) == 0) { + if ((!is_aifc && size < 18) || (is_aifc && size < 22)) + { + DEBUGF("CODEC_ERROR: 'COMM' chunk size=%lu < %d\n", + (unsigned long)size, (is_aifc)?22:18); + return CODEC_ERROR; + } + /* num_channels */ + format.channels = ((buf[8]<<8)|buf[9]); + /* num_sample_frames */ + /* + num_sample_frames = ((buf[10]<<24)|(buf[11]<<16)|(buf[12]<<8) + |buf[13]); + */ + + /* sample_size */ + format.bitspersample = ((buf[14]<<8)|buf[15]); + /* sample_rate (don't use last 4 bytes, only integer fs) */ + if (buf[16] != 0x40) { + DEBUGF("CODEC_ERROR: weird sampling rate (no @)\n"); + return CODEC_ERROR; + } + format.samplespersec = ((buf[18]<<24)|(buf[19]<<16)|(buf[20]<<8)|buf[21])+1; + format.samplespersec >>= (16 + 14 - buf[17]); + /* compressionType (AIFC only) */ + if (is_aifc) + { + format.formattag = (buf[26]<<24)|(buf[27]<<16)|(buf[28]<<8)|buf[29]; + + /* + * aiff's sample_size is uncompressed sound data size. + * But format.bitspersample is compressed sound data size. + */ + if (format.formattag == AIFC_FORMAT_ALAW || + format.formattag == AIFC_FORMAT_MULAW) + format.bitspersample = 8; + else if (format.formattag == AIFC_FORMAT_QT_IMA_ADPCM) + format.bitspersample = 4; + } + else + format.formattag = AIFC_FORMAT_PCM; + /* calc average bytes per second */ + format.avgbytespersec = format.samplespersec*format.channels*format.bitspersample/8; + } else if (memcmp(buf, "SSND", 4)==0) { + if (format.bitspersample == 0) { + DEBUGF("CODEC_ERROR: unsupported chunk order\n"); + return CODEC_ERROR; + } + /* offset2snd */ + offset2snd = (buf[8]<<24)|(buf[9]<<16)|(buf[10]<<8)|buf[11]; + /* block_size */ + format.blockalign = ((buf[12]<<24)|(buf[13]<<16)|(buf[14]<<8)|buf[15]) >> 3; + if (format.blockalign == 0) + format.blockalign = format.channels * format.bitspersample >> 3; + format.numbytes = size - 8 - offset2snd; + size = 8 + offset2snd; /* advance to the beginning of data */ + } else if (is_aifc && (memcmp(buf, "FVER", 4)==0)) { + /* Format Version Chunk (AIFC only chunk) */ + /* skip this chunk */ + } else { + DEBUGF("unsupported AIFF chunk: '%c%c%c%c', size=%lu\n", + buf[0], buf[1], buf[2], buf[3], (unsigned long)size); + } + + size += 8 + (size & 0x01); /* odd chunk sizes must be padded */ + + buf += size; + if (n < size) { + DEBUGF("CODEC_ERROR: AIFF header size > 1024\n"); + return CODEC_ERROR; + } + n -= size; + } /* while 'SSND' */ + + if (format.channels == 0) { + DEBUGF("CODEC_ERROR: 'COMM' chunk not found or 0-channels file\n"); + return CODEC_ERROR; + } + if (format.numbytes == 0) { + DEBUGF("CODEC_ERROR: 'SSND' chunk not found or has zero length\n"); + return CODEC_ERROR; + } + + codec = get_codec(format.formattag); + if (codec == 0) + { + DEBUGF("CODEC_ERROR: AIFC does not support compressionType: 0x%x\n", + (unsigned int)format.formattag); + return CODEC_ERROR; + } + + if (!codec->set_format(&format)) + { + return CODEC_ERROR; + } + + ci->configure(DSP_SWITCH_FREQUENCY, ci->id3->frequency); + + if (format.channels == 2) { + ci->configure(DSP_SET_STEREO_MODE, STEREO_INTERLEAVED); + } else if (format.channels == 1) { + ci->configure(DSP_SET_STEREO_MODE, STEREO_MONO); + } else { + DEBUGF("CODEC_ERROR: more than 2 channels unsupported\n"); + return CODEC_ERROR; + } + + if (format.samplesperblock == 0) + { + DEBUGF("CODEC_ERROR: samplesperblock is 0\n"); + return CODEC_ERROR; + } + if (format.blockalign == 0) + { + DEBUGF("CODEC_ERROR: blockalign is 0\n"); + return CODEC_ERROR; + } + + /* check chunksize */ + if ((format.chunksize / format.blockalign) * format.samplesperblock * format.channels + > PCM_SAMPLE_SIZE) + format.chunksize = (PCM_SAMPLE_SIZE / format.blockalign) * format.blockalign; + if (format.chunksize == 0) + { + DEBUGF("CODEC_ERROR: chunksize is 0\n"); + return CODEC_ERROR; + } + + firstblockposn = 1024 - n; + ci->advance_buffer(firstblockposn); + + /* make sure we're at the correct offset */ + if (bytesdone > (uint32_t) firstblockposn) { + /* Round down to previous block */ + struct pcm_pos *newpos = codec->get_seek_pos(bytesdone - firstblockposn, + PCM_SEEK_POS, NULL); + + if (newpos->pos > format.numbytes) + return CODEC_OK; + + if (ci->seek_buffer(firstblockposn + newpos->pos)) + { + bytesdone = newpos->pos; + decodedsamples = newpos->samples; + } + } else { + /* already where we need to be */ + bytesdone = 0; + } + + ci->set_elapsed(decodedsamples*1000LL/ci->id3->frequency); + + /* The main decoder loop */ + endofstream = 0; + + while (!endofstream) { + enum codec_command_action action = ci->get_command(¶m); + + if (action == CODEC_ACTION_HALT) + break; + + if (action == CODEC_ACTION_SEEK_TIME) { + /* 3rd args(read_buffer) is unnecessary in the format which AIFF supports. */ + struct pcm_pos *newpos = codec->get_seek_pos(param, PCM_SEEK_TIME, NULL); + + if (newpos->pos > format.numbytes) + { + ci->set_elapsed(ci->id3->length); + ci->seek_complete(); + break; + } + + if (ci->seek_buffer(firstblockposn + newpos->pos)) + { + bytesdone = newpos->pos; + decodedsamples = newpos->samples; + } + + ci->set_elapsed(decodedsamples*1000LL/ci->id3->frequency); + ci->seek_complete(); + } + aifbuf = (uint8_t *)ci->request_buffer(&n, format.chunksize); + + if (n == 0) + break; /* End of stream */ + + if (bytesdone + n > format.numbytes) { + n = format.numbytes - bytesdone; + endofstream = 1; + } + + if (codec->decode(aifbuf, n, samples, &bufcount) == CODEC_ERROR) + { + DEBUGF("codec error\n"); + return CODEC_ERROR; + } + + ci->pcmbuf_insert(samples, NULL, bufcount); + + ci->advance_buffer(n); + bytesdone += n; + decodedsamples += bufcount; + if (bytesdone >= format.numbytes) + endofstream = 1; + + ci->set_elapsed(decodedsamples*1000LL/ci->id3->frequency); + } + + return CODEC_OK; +} -- cgit v1.2.3