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     size_t n;
  79     int bufcount;
  80     int endofstream;
  81     unsigned char *buf;
  82     uint8_t *aifbuf;
  83     uint32_t offset2snd = 0;
  84     off_t firstblockposn;     /* position of the first block in file */
  85     bool is_aifc = false;
  86     const struct pcm_codec *codec;
  87     uint32_t size;
  88
  89     /* Generic codec initialisation */
  90     ci->configure(DSP_SET_SAMPLE_DEPTH, PCM_OUTPUT_DEPTH-1);
  91
  92 next_track:
  93     if (codec_init()) {
  94         status = 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     /* Need to save offset for later use (cleared indirectly by advance_buffer) */
 104     bytesdone = ci->id3->offset;
 105
 106     /* assume the AIFF header is less than 1024 bytes */
 107     buf = ci->request_buffer(&n, 1024);
 108     if (n < 54) {
 109         status = CODEC_ERROR;
 110         goto done;
 111     }
 112
 113     if (memcmp(buf, "FORM", 4) != 0)
 114     {
 115         DEBUGF("CODEC_ERROR: does not aiff format %c%c%c%c\n", buf[0], buf[1], buf[2], buf[3]);
 116         status = CODEC_ERROR;
 117         goto done;
 118     }
 119     if (memcmp(&buf[8], "AIFF", 4) == 0)
 120         is_aifc = false;
 121     else if (memcmp(&buf[8], "AIFC", 4) == 0)
 122         is_aifc = true;
 123     else
 124     {
 125         DEBUGF("CODEC_ERROR: does not aiff format %c%c%c%c\n", buf[8], buf[9], buf[10], buf[11]);
 126         status = CODEC_ERROR;
 127         goto done;
 128     }
 129
 130     buf += 12;
 131     n -= 12;
 132
 133     ci->memset(&format, 0, sizeof(struct pcm_format));
 134     format.is_signed = true;
 135     format.is_little_endian = false;
 136
 137     decodedsamples = 0;
 138     codec = 0;
 139
 140     /* read until 'SSND' chunk, which typically is last */
 141     while (format.numbytes == 0 && n >= 8)
 142     {
 143         /* chunkSize */
 144         size = ((buf[4]<<24)|(buf[5]<<16)|(buf[6]<<8)|buf[7]);
 145         if (memcmp(buf, "COMM", 4) == 0) {
 146             if ((!is_aifc && size < 18) || (is_aifc && size < 22))
 147             {
 148                 DEBUGF("CODEC_ERROR: 'COMM' chunk size=%lu < %d\n",
 149                        (unsigned long)size, (is_aifc)?22:18);
 150                 status = CODEC_ERROR;
 151                 goto done;
 152             }
 153             /* num_channels */
 154             format.channels = ((buf[8]<<8)|buf[9]);
 155             /* num_sample_frames */
 156             num_sample_frames = ((buf[10]<<24)|(buf[11]<<16)|(buf[12]<<8)
 157                                 |buf[13]);
 158             /* sample_size */
 159             format.bitspersample = ((buf[14]<<8)|buf[15]);
 160             /* sample_rate (don't use last 4 bytes, only integer fs) */
 161             if (buf[16] != 0x40) {
 162                 DEBUGF("CODEC_ERROR: weird sampling rate (no @)\n");
 163                 status = CODEC_ERROR;
 164                 goto done;
 165             }
 166             format.samplespersec = ((buf[18]<<24)|(buf[19]<<16)|(buf[20]<<8)|buf[21])+1;
 167             format.samplespersec >>= (16 + 14 - buf[17]);
 168             /* compressionType (AIFC only) */
 169             if (is_aifc)
 170             {
 171                 format.formattag = (buf[26]<<24)|(buf[27]<<16)|(buf[28]<<8)|buf[29];
 172
 173                 /*
 174                  * aiff's sample_size is uncompressed sound data size.
 175                  * But format.bitspersample is compressed sound data size.
 176                  */
 177                 if (format.formattag == AIFC_FORMAT_ALAW ||
 178                     format.formattag == AIFC_FORMAT_MULAW)
 179                     format.bitspersample = 8;
 180                 else if (format.formattag == AIFC_FORMAT_QT_IMA_ADPCM)
 181                     format.bitspersample = 4;
 182             }
 183             else
 184                 format.formattag = AIFC_FORMAT_PCM;
 185             /* calc average bytes per second */
 186             format.avgbytespersec = format.samplespersec*format.channels*format.bitspersample/8;
 187         } else if (memcmp(buf, "SSND", 4)==0) {
 188             if (format.bitspersample == 0) {
 189                 DEBUGF("CODEC_ERROR: unsupported chunk order\n");
 190                 status = CODEC_ERROR;
 191                 goto done;
 192             }
 193             /* offset2snd */
 194             offset2snd = (buf[8]<<24)|(buf[9]<<16)|(buf[10]<<8)|buf[11];
 195             /* block_size */
 196             format.blockalign = ((buf[12]<<24)|(buf[13]<<16)|(buf[14]<<8)|buf[15]) >> 3;
 197             if (format.blockalign == 0)
 198                 format.blockalign = format.channels * format.bitspersample >> 3;
 199             format.numbytes = size - 8 - offset2snd;
 200             size = 8 + offset2snd; /* advance to the beginning of data */
 201         } else if (is_aifc && (memcmp(buf, "FVER", 4)==0)) {
 202             /* Format Version Chunk (AIFC only chunk) */
 203             /* skip this chunk */
 204         } else {
 205             DEBUGF("unsupported AIFF chunk: '%c%c%c%c', size=%lu\n",
 206                    buf[0], buf[1], buf[2], buf[3], (unsigned long)size);
 207         }
 208
 209         size += 8 + (size & 0x01); /* odd chunk sizes must be padded */
 210
 211         buf += size;
 212         if (n < size) {
 213             DEBUGF("CODEC_ERROR: AIFF header size > 1024\n");
 214             status = CODEC_ERROR;
 215             goto done;
 216         }
 217         n -= size;
 218     } /* while 'SSND' */
 219
 220     if (format.channels == 0) {
 221         DEBUGF("CODEC_ERROR: 'COMM' chunk not found or 0-channels file\n");
 222         status = CODEC_ERROR;
 223         goto done;
 224     }
 225     if (format.numbytes == 0) {
 226         DEBUGF("CODEC_ERROR: 'SSND' chunk not found or has zero length\n");
 227         status = CODEC_ERROR;
 228         goto done;
 229     }
 230
 231     codec = get_codec(format.formattag);
 232     if (codec == 0)
 233     {
 234         DEBUGF("CODEC_ERROR: AIFC does not support compressionType: 0x%x\n",
 235             (unsigned int)format.formattag);
 236         status = CODEC_ERROR;
 237         goto done;
 238     }
 239
 240     if (!codec->set_format(&format))
 241     {
 242         status = CODEC_ERROR;
 243         goto done;
 244     }
 245
 246     ci->configure(DSP_SWITCH_FREQUENCY, ci->id3->frequency);
 247
 248     if (format.channels == 2) {
 249         ci->configure(DSP_SET_STEREO_MODE, STEREO_INTERLEAVED);
 250     } else if (format.channels == 1) {
 251         ci->configure(DSP_SET_STEREO_MODE, STEREO_MONO);
 252     } else {
 253         DEBUGF("CODEC_ERROR: more than 2 channels unsupported\n");
 254         status = CODEC_ERROR;
 255         goto done;
 256     }
 257
 258     if (format.samplesperblock == 0)
 259     {
 260         DEBUGF("CODEC_ERROR: samplesperblock is 0\n");
 261         status = CODEC_ERROR;
 262         goto done;
 263     }
 264     if (format.blockalign == 0)
 265     {
 266         DEBUGF("CODEC_ERROR: blockalign is 0\n");
 267         status = CODEC_ERROR;
 268         goto done;
 269     }
 270
 271     /* check chunksize */
 272     if ((format.chunksize / format.blockalign) * format.samplesperblock * format.channels
 273            > PCM_SAMPLE_SIZE)
 274         format.chunksize = (PCM_SAMPLE_SIZE / format.blockalign) * format.blockalign;
 275     if (format.chunksize == 0)
 276     {
 277         DEBUGF("CODEC_ERROR: chunksize is 0\n");
 278         status = CODEC_ERROR;
 279         goto done;
 280     }
 281
 282     firstblockposn = 1024 - n;
 283     ci->advance_buffer(firstblockposn);
 284
 285     /* make sure we're at the correct offset */
 286     if (bytesdone > (uint32_t) firstblockposn) {
 287         /* Round down to previous block */
 288         struct pcm_pos *newpos = codec->get_seek_pos(bytesdone - firstblockposn,
 289                                                      PCM_SEEK_POS, NULL);
 290
 291         if (newpos->pos > format.numbytes)
 292             goto done;
 293         if (ci->seek_buffer(firstblockposn + newpos->pos))
 294         {
 295             bytesdone      = newpos->pos;
 296             decodedsamples = newpos->samples;
 297         }
 298         ci->seek_complete();
 299     } else {
 300         /* already where we need to be */
 301         bytesdone = 0;
 302     }
 303
 304     /* The main decoder loop */
 305     endofstream = 0;
 306
 307     while (!endofstream) {
 308         ci->yield();
 309         if (ci->stop_codec || ci->new_track)
 310             break;
 311
 312         if (ci->seek_time) {
 313             /* 3rd args(read_buffer) is unnecessary in the format which AIFF supports. */
 314             struct pcm_pos *newpos = codec->get_seek_pos(ci->seek_time, PCM_SEEK_TIME, NULL);
 315
 316             if (newpos->pos > format.numbytes)
 317                 break;
 318             if (ci->seek_buffer(firstblockposn + newpos->pos))
 319             {
 320                 bytesdone      = newpos->pos;
 321                 decodedsamples = newpos->samples;
 322             }
 323             ci->seek_complete();
 324         }
 325         aifbuf = (uint8_t *)ci->request_buffer(&n, format.chunksize);
 326
 327         if (n == 0)
 328             break; /* End of stream */
 329
 330         if (bytesdone + n > format.numbytes) {
 331             n = format.numbytes - bytesdone;
 332             endofstream = 1;
 333         }
 334
 335         status = codec->decode(aifbuf, n, samples, &bufcount);
 336         if (status == CODEC_ERROR)
 337         {
 338             DEBUGF("codec error\n");
 339             goto done;
 340         }
 341
 342         ci->pcmbuf_insert(samples, NULL, bufcount);
 343
 344         ci->advance_buffer(n);
 345         bytesdone += n;
 346         decodedsamples += bufcount;
 347         if (bytesdone >= format.numbytes)
 348             endofstream = 1;
 349
 350         ci->set_elapsed(decodedsamples*1000LL/ci->id3->frequency);
 351     }
 352     status = CODEC_OK;
 353
 354 done:
 355     if (ci->request_next_track())
 356         goto next_track;
 357
 358 exit:
 359     return status;
 360 }
 361