/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * * 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 libpcm_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) */ param = ci->id3->elapsed; 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 libpcm_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 if ( (memcmp(buf, "NAME", 4)==0) || (memcmp(buf, "AUTH", 4)==0) || (memcmp(buf, "ANNO", 4)==0)) { /* Text chunks containing only metadata */ /* 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_SET_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 || param) { uint32_t seek_val; int seek_mode; if (bytesdone) { seek_val = bytesdone - MIN((uint32_t) firstblockposn, bytesdone); seek_mode = PCM_SEEK_POS; } else { seek_val = param; seek_mode = PCM_SEEK_TIME; } /* Round down to previous block */ struct pcm_pos *newpos = codec->get_seek_pos(seek_val, seek_mode, 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) { long 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; }