85e40257dc
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29348 a1c6a512-1295-4272-9138-f99709370657
355 lines
11 KiB
C
355 lines
11 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (c) 2005 Jvo Studer
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* Copyright (c) 2009 Yoshihisa Uchida
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "codeclib.h"
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#include "codecs/libpcm/support_formats.h"
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CODEC_HEADER
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#define FOURCC(c1, c2, c3, c4) \
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((((uint32_t)c1)<<24)|(((uint32_t)c2)<<16)|(((uint32_t)c3)<<8)|((uint32_t)c4))
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/* This codec supports the following AIFC compressionType formats */
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enum {
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AIFC_FORMAT_PCM = FOURCC('N', 'O', 'N', 'E'), /* AIFC PCM Format (big endian) */
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AIFC_FORMAT_ALAW = FOURCC('a', 'l', 'a', 'w'), /* AIFC ALaw compressed */
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AIFC_FORMAT_MULAW = FOURCC('u', 'l', 'a', 'w'), /* AIFC uLaw compressed */
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AIFC_FORMAT_IEEE_FLOAT32 = FOURCC('f', 'l', '3', '2'), /* AIFC IEEE float 32 bit */
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AIFC_FORMAT_IEEE_FLOAT64 = FOURCC('f', 'l', '6', '4'), /* AIFC IEEE float 64 bit */
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AIFC_FORMAT_QT_IMA_ADPCM = FOURCC('i', 'm', 'a', '4'), /* AIFC QuickTime IMA ADPCM */
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};
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static const struct pcm_entry pcm_codecs[] = {
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{ AIFC_FORMAT_PCM, get_linear_pcm_codec },
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{ AIFC_FORMAT_ALAW, get_itut_g711_alaw_codec },
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{ AIFC_FORMAT_MULAW, get_itut_g711_mulaw_codec },
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{ AIFC_FORMAT_IEEE_FLOAT32, get_ieee_float_codec },
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{ AIFC_FORMAT_IEEE_FLOAT64, get_ieee_float_codec },
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{ AIFC_FORMAT_QT_IMA_ADPCM, get_qt_ima_adpcm_codec },
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};
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#define PCM_SAMPLE_SIZE (1024*2)
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static int32_t samples[PCM_SAMPLE_SIZE] IBSS_ATTR;
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static const struct pcm_codec *get_codec(uint32_t formattag)
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{
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unsigned i;
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for (i = 0; i < sizeof(pcm_codecs)/sizeof(pcm_codecs[0]); i++)
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if (pcm_codecs[i].format_tag == formattag)
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return pcm_codecs[i].get_codec();
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return NULL;
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}
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enum codec_status codec_main(void)
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{
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int status;
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struct pcm_format format;
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uint32_t bytesdone, decodedsamples;
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uint32_t num_sample_frames = 0;
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size_t n;
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int bufcount;
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int endofstream;
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unsigned char *buf;
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uint8_t *aifbuf;
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uint32_t offset2snd = 0;
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off_t firstblockposn; /* position of the first block in file */
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bool is_aifc = false;
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const struct pcm_codec *codec;
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uint32_t size;
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/* Generic codec initialisation */
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ci->configure(DSP_SET_SAMPLE_DEPTH, PCM_OUTPUT_DEPTH-1);
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next_track:
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status = CODEC_OK;
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if (codec_init()) {
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status = CODEC_ERROR;
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goto exit;
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}
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if (codec_wait_taginfo() != 0)
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goto done;
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codec_set_replaygain(ci->id3);
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/* Need to save offset for later use (cleared indirectly by advance_buffer) */
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bytesdone = ci->id3->offset;
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/* assume the AIFF header is less than 1024 bytes */
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buf = ci->request_buffer(&n, 1024);
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if (n < 54) {
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status = CODEC_ERROR;
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goto done;
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}
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if (memcmp(buf, "FORM", 4) != 0)
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{
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DEBUGF("CODEC_ERROR: does not aiff format %4.4s\n", (char*)&buf[0]);
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status = CODEC_ERROR;
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goto done;
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}
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if (memcmp(&buf[8], "AIFF", 4) == 0)
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is_aifc = false;
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else if (memcmp(&buf[8], "AIFC", 4) == 0)
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is_aifc = true;
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else
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{
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DEBUGF("CODEC_ERROR: does not aiff format %4.4s\n", (char*)&buf[8]);
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status = CODEC_ERROR;
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goto done;
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}
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buf += 12;
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n -= 12;
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ci->memset(&format, 0, sizeof(struct pcm_format));
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format.is_signed = true;
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format.is_little_endian = false;
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decodedsamples = 0;
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codec = 0;
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/* read until 'SSND' chunk, which typically is last */
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while (format.numbytes == 0 && n >= 8)
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{
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/* chunkSize */
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size = ((buf[4]<<24)|(buf[5]<<16)|(buf[6]<<8)|buf[7]);
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if (memcmp(buf, "COMM", 4) == 0) {
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if ((!is_aifc && size < 18) || (is_aifc && size < 22))
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{
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DEBUGF("CODEC_ERROR: 'COMM' chunk size=%lu < %d\n",
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(unsigned long)size, (is_aifc)?22:18);
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status = CODEC_ERROR;
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goto done;
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}
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/* num_channels */
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format.channels = ((buf[8]<<8)|buf[9]);
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/* num_sample_frames */
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num_sample_frames = ((buf[10]<<24)|(buf[11]<<16)|(buf[12]<<8)
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|buf[13]);
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/* sample_size */
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format.bitspersample = ((buf[14]<<8)|buf[15]);
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/* sample_rate (don't use last 4 bytes, only integer fs) */
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if (buf[16] != 0x40) {
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DEBUGF("CODEC_ERROR: weird sampling rate (no @)\n");
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status = CODEC_ERROR;
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goto done;
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}
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format.samplespersec = ((buf[18]<<24)|(buf[19]<<16)|(buf[20]<<8)|buf[21])+1;
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format.samplespersec >>= (16 + 14 - buf[17]);
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/* compressionType (AIFC only) */
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if (is_aifc)
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{
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format.formattag = (buf[26]<<24)|(buf[27]<<16)|(buf[28]<<8)|buf[29];
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/*
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* aiff's sample_size is uncompressed sound data size.
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* But format.bitspersample is compressed sound data size.
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*/
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if (format.formattag == AIFC_FORMAT_ALAW ||
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format.formattag == AIFC_FORMAT_MULAW)
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format.bitspersample = 8;
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else if (format.formattag == AIFC_FORMAT_QT_IMA_ADPCM)
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format.bitspersample = 4;
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}
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else
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format.formattag = AIFC_FORMAT_PCM;
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/* calc average bytes per second */
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format.avgbytespersec = format.samplespersec*format.channels*format.bitspersample/8;
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} else if (memcmp(buf, "SSND", 4)==0) {
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if (format.bitspersample == 0) {
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DEBUGF("CODEC_ERROR: unsupported chunk order\n");
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status = CODEC_ERROR;
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goto done;
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}
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/* offset2snd */
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offset2snd = (buf[8]<<24)|(buf[9]<<16)|(buf[10]<<8)|buf[11];
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/* block_size */
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format.blockalign = ((buf[12]<<24)|(buf[13]<<16)|(buf[14]<<8)|buf[15]) >> 3;
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if (format.blockalign == 0)
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format.blockalign = format.channels * format.bitspersample >> 3;
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format.numbytes = size - 8 - offset2snd;
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size = 8 + offset2snd; /* advance to the beginning of data */
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} else if (is_aifc && (memcmp(buf, "FVER", 4)==0)) {
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/* Format Version Chunk (AIFC only chunk) */
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/* skip this chunk */
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} else {
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DEBUGF("unsupported AIFF chunk: '%c%c%c%c', size=%lu\n",
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buf[0], buf[1], buf[2], buf[3], (unsigned long)size);
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}
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size += 8 + (size & 0x01); /* odd chunk sizes must be padded */
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buf += size;
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if (n < size) {
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DEBUGF("CODEC_ERROR: AIFF header size > 1024\n");
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status = CODEC_ERROR;
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goto done;
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}
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n -= size;
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} /* while 'SSND' */
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if (format.channels == 0) {
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DEBUGF("CODEC_ERROR: 'COMM' chunk not found or 0-channels file\n");
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status = CODEC_ERROR;
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goto done;
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}
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if (format.numbytes == 0) {
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DEBUGF("CODEC_ERROR: 'SSND' chunk not found or has zero length\n");
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status = CODEC_ERROR;
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goto done;
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}
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codec = get_codec(format.formattag);
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if (codec == 0)
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{
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DEBUGF("CODEC_ERROR: AIFC does not support compressionType: 0x%x\n",
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(unsigned int)format.formattag);
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status = CODEC_ERROR;
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goto done;
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}
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if (!codec->set_format(&format))
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{
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status = CODEC_ERROR;
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goto done;
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}
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ci->configure(DSP_SWITCH_FREQUENCY, ci->id3->frequency);
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if (format.channels == 2) {
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ci->configure(DSP_SET_STEREO_MODE, STEREO_INTERLEAVED);
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} else if (format.channels == 1) {
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ci->configure(DSP_SET_STEREO_MODE, STEREO_MONO);
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} else {
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DEBUGF("CODEC_ERROR: more than 2 channels unsupported\n");
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status = CODEC_ERROR;
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goto done;
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}
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if (format.samplesperblock == 0)
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{
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DEBUGF("CODEC_ERROR: samplesperblock is 0\n");
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status = CODEC_ERROR;
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goto done;
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}
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if (format.blockalign == 0)
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{
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DEBUGF("CODEC_ERROR: blockalign is 0\n");
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status = CODEC_ERROR;
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goto done;
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}
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/* check chunksize */
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if ((format.chunksize / format.blockalign) * format.samplesperblock * format.channels
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> PCM_SAMPLE_SIZE)
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format.chunksize = (PCM_SAMPLE_SIZE / format.blockalign) * format.blockalign;
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if (format.chunksize == 0)
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{
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DEBUGF("CODEC_ERROR: chunksize is 0\n");
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status = CODEC_ERROR;
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goto done;
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}
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firstblockposn = 1024 - n;
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ci->advance_buffer(firstblockposn);
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/* make sure we're at the correct offset */
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if (bytesdone > (uint32_t) firstblockposn) {
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/* Round down to previous block */
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struct pcm_pos *newpos = codec->get_seek_pos(bytesdone - firstblockposn,
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PCM_SEEK_POS, NULL);
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if (newpos->pos > format.numbytes)
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goto done;
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if (ci->seek_buffer(firstblockposn + newpos->pos))
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{
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bytesdone = newpos->pos;
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decodedsamples = newpos->samples;
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}
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ci->seek_complete();
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} else {
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/* already where we need to be */
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bytesdone = 0;
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}
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/* The main decoder loop */
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endofstream = 0;
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while (!endofstream) {
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ci->yield();
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if (ci->stop_codec || ci->new_track)
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break;
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if (ci->seek_time) {
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/* 3rd args(read_buffer) is unnecessary in the format which AIFF supports. */
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struct pcm_pos *newpos = codec->get_seek_pos(ci->seek_time, PCM_SEEK_TIME, NULL);
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if (newpos->pos > format.numbytes)
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break;
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if (ci->seek_buffer(firstblockposn + newpos->pos))
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{
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bytesdone = newpos->pos;
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decodedsamples = newpos->samples;
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}
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ci->seek_complete();
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}
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aifbuf = (uint8_t *)ci->request_buffer(&n, format.chunksize);
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if (n == 0)
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break; /* End of stream */
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if (bytesdone + n > format.numbytes) {
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n = format.numbytes - bytesdone;
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endofstream = 1;
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}
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status = codec->decode(aifbuf, n, samples, &bufcount);
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if (status == CODEC_ERROR)
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{
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DEBUGF("codec error\n");
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goto done;
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}
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ci->pcmbuf_insert(samples, NULL, bufcount);
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ci->advance_buffer(n);
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bytesdone += n;
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decodedsamples += bufcount;
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if (bytesdone >= format.numbytes)
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endofstream = 1;
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ci->set_elapsed(decodedsamples*1000LL/ci->id3->frequency);
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}
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status = CODEC_OK;
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done:
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if (ci->request_next_track())
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goto next_track;
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exit:
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return status;
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}
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