/*************************************************************************** * __________ __ ___. * 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 #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 */ }; 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 }, }; #define NUM_FORMATS 3 static int32_t samples[PCM_CHUNK_SIZE] IBSS_ATTR; static const struct pcm_codec *get_codec(uint32_t formattag) { int i; for (i = 0; i < NUM_FORMATS; i++) { if (pcm_codecs[i].format_tag == formattag) { if (pcm_codecs[i].get_codec) return pcm_codecs[i].get_codec(); return 0; } } return 0; } enum codec_status codec_main(void) { int status = CODEC_OK; struct pcm_format format; uint32_t bytesdone, decodedbytes; uint32_t num_sample_frames = 0; uint32_t i = CODEC_OK; 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; /* Generic codec initialisation */ ci->configure(DSP_SET_SAMPLE_DEPTH, 28); next_track: if (codec_init()) { i = CODEC_ERROR; goto exit; } while (!*ci->taginfo_ready && !ci->stop_codec) ci->sleep(1); codec_set_replaygain(ci->id3); /* assume the AIFF header is less than 1024 bytes */ buf = ci->request_buffer(&n, 1024); if (n < 54) { i = CODEC_ERROR; goto done; } if (memcmp(buf, "FORM", 4) != 0) { DEBUGF("CODEC_ERROR: does not aiff format %c%c%c%c\n", buf[0], buf[1], buf[2], buf[3]); i = CODEC_ERROR; goto done; } 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 %c%c%c%c\n", buf[8], buf[9], buf[10], buf[11]); i = CODEC_ERROR; goto done; } buf += 12; n -= 12; ci->memset(&format, 0, sizeof(struct pcm_format)); format.is_signed = true; format.is_little_endian = false; decodedbytes = 0; codec = 0; /* read until 'SSND' chunk, which typically is last */ while (format.numbytes == 0 && n >= 8) { /* chunkSize */ i = ((buf[4]<<24)|(buf[5]<<16)|(buf[6]<<8)|buf[7]); if (memcmp(buf, "COMM", 4) == 0) { if ((!is_aifc && i < 18) || (is_aifc && i < 22)) { DEBUGF("CODEC_ERROR: 'COMM' chunk size=%lu < %d\n", (unsigned long)i, (is_aifc)?22:18); i = CODEC_ERROR; goto done; } /* 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"); i = CODEC_ERROR; goto done; } 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 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"); i = CODEC_ERROR; goto done; } /* 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]; if (format.blockalign == 0) format.blockalign = format.channels*format.bitspersample; format.numbytes = i - 8 - offset2snd; i = 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)i); } if (i & 0x01) /* odd chunk sizes must be padded */ i++; buf += i + 8; if (n < (i + 8)) { DEBUGF("CODEC_ERROR: AIFF header size > 1024\n"); i = CODEC_ERROR; goto done; } n -= i + 8; } /* while 'SSND' */ if (format.channels == 0) { DEBUGF("CODEC_ERROR: 'COMM' chunk not found or 0-channels file\n"); i = CODEC_ERROR; goto done; } if (format.numbytes == 0) { DEBUGF("CODEC_ERROR: 'SSND' chunk not found or has zero length\n"); i = CODEC_ERROR; goto done; } codec = get_codec(format.formattag); if (codec == 0) { DEBUGF("CODEC_ERROR: AIFC does not support compressionType: 0x%x\n", (unsigned int)format.formattag); i = CODEC_ERROR; goto done; } if (!codec->set_format(&format, 0)) { i = CODEC_ERROR; goto done; } 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"); i = CODEC_ERROR; goto done; } firstblockposn = 1024 - n; ci->advance_buffer(firstblockposn); /* The main decoder loop */ bytesdone = 0; ci->set_elapsed(0); endofstream = 0; while (!endofstream) { ci->yield(); if (ci->stop_codec || ci->new_track) break; if (ci->seek_time) { uint32_t newpos = codec->get_seek_pos(ci->seek_time); if (newpos > format.numbytes) break; if (ci->seek_buffer(firstblockposn + newpos)) bytesdone = newpos; 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; } status = codec->decode(aifbuf, n, samples, &bufcount); if (status == CODEC_ERROR) { DEBUGF("codec error\n"); goto done; } ci->pcmbuf_insert(samples, NULL, bufcount); ci->advance_buffer(n); bytesdone += n; decodedbytes += bufcount; if (bytesdone >= format.numbytes) endofstream = 1; ci->set_elapsed(decodedbytes*1000LL/ci->id3->frequency); } i = CODEC_OK; done: if (ci->request_next_track()) goto next_track; exit: return i; }