apps/codecs/aiff.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (c) 2005 Jvo Studer
  11  * Copyright (c) 2009 Yoshihisa Uchida
  12  *
  13  * This program is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU General Public License
  15  * as published by the Free Software Foundation; either version 2
  16  * of the License, or (at your option) any later version.
  17  *
  18  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  19  * KIND, either express or implied.
  20  *
  21  ****************************************************************************/
  22
  23 #include "codeclib.h"
  24 #include "codecs/libpcm/support_formats.h"
  25
  26 CODEC_HEADER
  27
  28 #define FOURCC(c1, c2, c3, c4) \
  29 ((((uint32_t)c1)<<24)|(((uint32_t)c2)<<16)|(((uint32_t)c3)<<8)|((uint32_t)c4))
  30
  31 /* This codec supports the following AIFC compressionType formats */
  32 enum {
  33     AIFC_FORMAT_PCM          = FOURCC('N', 'O', 'N', 'E'), /* AIFC PCM Format (big endian) */
  34     AIFC_FORMAT_ALAW         = FOURCC('a', 'l', 'a', 'w'), /* AIFC ALaw compressed */
  35     AIFC_FORMAT_MULAW        = FOURCC('u', 'l', 'a', 'w'), /* AIFC uLaw compressed */
  36     AIFC_FORMAT_IEEE_FLOAT32 = FOURCC('f', 'l', '3', '2'), /* AIFC IEEE float 32 bit */
  37     AIFC_FORMAT_IEEE_FLOAT64 = FOURCC('f', 'l', '6', '4'), /* AIFC IEEE float 64 bit */
  38     AIFC_FORMAT_QT_IMA_ADPCM = FOURCC('i', 'm', 'a', '4'), /* AIFC QuickTime IMA ADPCM */
  39 };
  40
  41 static const struct pcm_entry pcm_codecs[] = {
  42     { AIFC_FORMAT_PCM,          get_linear_pcm_codec      },
  43     { AIFC_FORMAT_ALAW,         get_itut_g711_alaw_codec  },
  44     { AIFC_FORMAT_MULAW,        get_itut_g711_mulaw_codec },
  45     { AIFC_FORMAT_IEEE_FLOAT32, get_ieee_float_codec      },
  46     { AIFC_FORMAT_IEEE_FLOAT64, get_ieee_float_codec      },
  47     { AIFC_FORMAT_QT_IMA_ADPCM, get_qt_ima_adpcm_codec    },
  48 };
  49
  50 #define NUM_FORMATS 6
  51
  52 #define PCM_SAMPLE_SIZE (1024*2)
  53
  54 static int32_t samples[PCM_SAMPLE_SIZE] IBSS_ATTR;
  55
  56 static const struct pcm_codec *get_codec(uint32_t formattag)
  57 {
  58     int i;
  59
  60     for (i = 0; i < NUM_FORMATS; i++)
  61     {
  62         if (pcm_codecs[i].format_tag == formattag)
  63         {
  64             if (pcm_codecs[i].get_codec)
  65                 return pcm_codecs[i].get_codec();
  66             return 0;
  67         }
  68     }
  69     return 0;
  70 }
  71
  72 enum codec_status codec_main(void)
  73 {
  74     int status = CODEC_OK;
  75     struct pcm_format format;
  76     uint32_t bytesdone, decodedsamples;
  77     uint32_t num_sample_frames = 0;
  78     uint32_t i = CODEC_OK;
  79     size_t n;
  80     int bufcount;
  81     int endofstream;
  82     unsigned char *buf;
  83     uint8_t *aifbuf;
  84     uint32_t offset2snd = 0;
  85     off_t firstblockposn;     /* position of the first block in file */
  86     bool is_aifc = false;
  87     const struct pcm_codec *codec;
  88
  89     /* Generic codec initialisation */
  90     ci->configure(DSP_SET_SAMPLE_DEPTH, PCM_OUTPUT_DEPTH);
  91
  92 next_track:
  93     if (codec_init()) {
  94         i = CODEC_ERROR;
  95         goto exit;
  96     }
  97
  98     while (!*ci->taginfo_ready && !ci->stop_codec)
  99         ci->sleep(1);
 100
 101     codec_set_replaygain(ci->id3);
 102
 103     /* assume the AIFF header is less than 1024 bytes */
 104     buf = ci->request_buffer(&n, 1024);
 105     if (n < 54) {
 106         i = CODEC_ERROR;
 107         goto done;
 108     }
 109
 110     if (memcmp(buf, "FORM", 4) != 0)
 111     {
 112         DEBUGF("CODEC_ERROR: does not aiff format %c%c%c%c\n", buf[0], buf[1], buf[2], buf[3]);
 113         i = CODEC_ERROR;
 114         goto done;
 115     }
 116     if (memcmp(&buf[8], "AIFF", 4) == 0)
 117         is_aifc = false;
 118     else if (memcmp(&buf[8], "AIFC", 4) == 0)
 119         is_aifc = true;
 120     else
 121     {
 122         DEBUGF("CODEC_ERROR: does not aiff format %c%c%c%c\n", buf[8], buf[9], buf[10], buf[11]);
 123         i = CODEC_ERROR;
 124         goto done;
 125     }
 126
 127     buf += 12;
 128     n -= 12;
 129
 130     ci->memset(&format, 0, sizeof(struct pcm_format));
 131     format.is_signed = true;
 132     format.is_little_endian = false;
 133
 134     decodedsamples = 0;
 135     codec = 0;
 136
 137     /* read until 'SSND' chunk, which typically is last */
 138     while (format.numbytes == 0 && n >= 8)
 139     {
 140         /* chunkSize */
 141         i = ((buf[4]<<24)|(buf[5]<<16)|(buf[6]<<8)|buf[7]);
 142         if (memcmp(buf, "COMM", 4) == 0) {
 143             if ((!is_aifc && i < 18) || (is_aifc && i < 22))
 144             {
 145                 DEBUGF("CODEC_ERROR: 'COMM' chunk size=%lu < %d\n",
 146                        (unsigned long)i, (is_aifc)?22:18);
 147                 i = CODEC_ERROR;
 148                 goto done;
 149             }
 150             /* num_channels */
 151             format.channels = ((buf[8]<<8)|buf[9]);
 152             /* num_sample_frames */
 153             num_sample_frames = ((buf[10]<<24)|(buf[11]<<16)|(buf[12]<<8)
 154                                 |buf[13]);
 155             /* sample_size */
 156             format.bitspersample = ((buf[14]<<8)|buf[15]);
 157             /* sample_rate (don't use last 4 bytes, only integer fs) */
 158             if (buf[16] != 0x40) {
 159                 DEBUGF("CODEC_ERROR: weird sampling rate (no @)\n");
 160                 i = CODEC_ERROR;
 161                 goto done;
 162             }
 163             format.samplespersec = ((buf[18]<<24)|(buf[19]<<16)|(buf[20]<<8)|buf[21])+1;
 164             format.samplespersec >>= (16 + 14 - buf[17]);
 165             /* compressionType (AIFC only) */
 166             if (is_aifc)
 167             {
 168                 format.formattag = (buf[26]<<24)|(buf[27]<<16)|(buf[28]<<8)|buf[29];
 169
 170                 /*
 171                  * aiff's sample_size is uncompressed sound data size.
 172                  * But format.bitspersample is compressed sound data size.
 173                  */
 174                 if (format.formattag == AIFC_FORMAT_ALAW ||
 175                     format.formattag == AIFC_FORMAT_MULAW)
 176                     format.bitspersample = 8;
 177                 else if (format.formattag == AIFC_FORMAT_QT_IMA_ADPCM)
 178                     format.bitspersample = 4;
 179             }
 180             else
 181                 format.formattag = AIFC_FORMAT_PCM;
 182             /* calc average bytes per second */
 183             format.avgbytespersec = format.samplespersec*format.channels*format.bitspersample/8;
 184         } else if (memcmp(buf, "SSND", 4)==0) {
 185             if (format.bitspersample == 0) {
 186                 DEBUGF("CODEC_ERROR: unsupported chunk order\n");
 187                 i = CODEC_ERROR;
 188                 goto done;
 189             }
 190             /* offset2snd */
 191             offset2snd = (buf[8]<<24)|(buf[9]<<16)|(buf[10]<<8)|buf[11];
 192             /* block_size */
 193             format.blockalign = ((buf[12]<<24)|(buf[13]<<16)|(buf[14]<<8)|buf[15]) >> 3;
 194             if (format.blockalign == 0)
 195                 format.blockalign = format.channels * format.bitspersample >> 3;
 196             format.numbytes = i - 8 - offset2snd;
 197             i = 8 + offset2snd; /* advance to the beginning of data */
 198         } else if (is_aifc && (memcmp(buf, "FVER", 4)==0)) {
 199             /* Format Version Chunk (AIFC only chunk) */
 200             /* skip this chunk */
 201         } else {
 202             DEBUGF("unsupported AIFF chunk: '%c%c%c%c', size=%lu\n",
 203                    buf[0], buf[1], buf[2], buf[3], (unsigned long)i);
 204         }
 205
 206         if (i & 0x01) /* odd chunk sizes must be padded */
 207             i++;
 208         buf += i + 8;
 209         if (n < (i + 8)) {
 210             DEBUGF("CODEC_ERROR: AIFF header size > 1024\n");
 211             i = CODEC_ERROR;
 212             goto done;
 213         }
 214         n -= i + 8;
 215     } /* while 'SSND' */
 216
 217     if (format.channels == 0) {
 218         DEBUGF("CODEC_ERROR: 'COMM' chunk not found or 0-channels file\n");
 219         i = CODEC_ERROR;
 220         goto done;
 221     }
 222     if (format.numbytes == 0) {
 223         DEBUGF("CODEC_ERROR: 'SSND' chunk not found or has zero length\n");
 224         i = CODEC_ERROR;
 225         goto done;
 226     }
 227
 228     codec = get_codec(format.formattag);
 229     if (codec == 0)
 230     {
 231         DEBUGF("CODEC_ERROR: AIFC does not support compressionType: 0x%x\n",
 232             (unsigned int)format.formattag);
 233         i = CODEC_ERROR;
 234         goto done;
 235     }
 236
 237     if (!codec->set_format(&format))
 238     {
 239         i = CODEC_ERROR;
 240         goto done;
 241     }
 242
 243     ci->configure(DSP_SWITCH_FREQUENCY, ci->id3->frequency);
 244
 245     if (format.channels == 2) {
 246         ci->configure(DSP_SET_STEREO_MODE, STEREO_INTERLEAVED);
 247     } else if (format.channels == 1) {
 248         ci->configure(DSP_SET_STEREO_MODE, STEREO_MONO);
 249     } else {
 250         DEBUGF("CODEC_ERROR: more than 2 channels unsupported\n");
 251         i = CODEC_ERROR;
 252         goto done;
 253     }
 254
 255     if (format.samplesperblock == 0)
 256     {
 257         DEBUGF("CODEC_ERROR: samplesperblock is 0\n");
 258         i = CODEC_ERROR;
 259         goto done;
 260     }
 261     if (format.blockalign == 0)
 262     {
 263         DEBUGF("CODEC_ERROR: blockalign is 0\n");
 264         i = CODEC_ERROR;
 265         goto done;
 266     }
 267
 268     /* check chunksize */
 269     if ((format.chunksize / format.blockalign) * format.samplesperblock * format.channels
 270            > PCM_SAMPLE_SIZE)
 271         format.chunksize = (PCM_SAMPLE_SIZE / format.blockalign) * format.blockalign;
 272     if (format.chunksize == 0)
 273     {
 274         DEBUGF("CODEC_ERROR: chunksize is 0\n");
 275         i = CODEC_ERROR;
 276         goto done;
 277     }
 278
 279     firstblockposn = 1024 - n;
 280     ci->advance_buffer(firstblockposn);
 281
 282     /* The main decoder loop */
 283     bytesdone = 0;
 284     ci->set_elapsed(0);
 285     endofstream = 0;
 286
 287     while (!endofstream) {
 288         ci->yield();
 289         if (ci->stop_codec || ci->new_track)
 290             break;
 291
 292         if (ci->seek_time) {
 293             /* 2nd args(read_buffer) is unnecessary in the format which AIFF supports. */
 294             struct pcm_pos *newpos = codec->get_seek_pos(ci->seek_time, NULL);
 295
 296             decodedsamples = newpos->samples;
 297             if (newpos->pos > format.numbytes)
 298                 break;
 299             if (ci->seek_buffer(firstblockposn + newpos->pos))
 300                 bytesdone = newpos->pos;
 301             ci->seek_complete();
 302         }
 303         aifbuf = (uint8_t *)ci->request_buffer(&n, format.chunksize);
 304
 305         if (n == 0)
 306             break; /* End of stream */
 307
 308         if (bytesdone + n > format.numbytes) {
 309             n = format.numbytes - bytesdone;
 310             endofstream = 1;
 311         }
 312
 313         status = codec->decode(aifbuf, n, samples, &bufcount);
 314         if (status == CODEC_ERROR)
 315         {
 316             DEBUGF("codec error\n");
 317             goto done;
 318         }
 319
 320         ci->pcmbuf_insert(samples, NULL, bufcount);
 321
 322         ci->advance_buffer(n);
 323         bytesdone += n;
 324         decodedsamples += bufcount;
 325         if (bytesdone >= format.numbytes)
 326             endofstream = 1;
 327
 328         ci->set_elapsed(decodedsamples*1000LL/ci->id3->frequency);
 329     }
 330     i = CODEC_OK;
 331
 332 done:
 333     if (ci->request_next_track())
 334         goto next_track;
 335
 336 exit:
 337     return i;
 338 }
 339