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 PCM_SAMPLE_SIZE (1024*2)
  51
  52 static int32_t samples[PCM_SAMPLE_SIZE] IBSS_ATTR;
  53
  54 static const struct pcm_codec *get_codec(uint32_t formattag)
  55 {
  56     unsigned i;
  57     for (i = 0; i < sizeof(pcm_codecs)/sizeof(pcm_codecs[0]); i++)
  58         if (pcm_codecs[i].format_tag == formattag)
  59             return pcm_codecs[i].get_codec();
  60
  61     return NULL;
  62 }
  63
  64 enum codec_status codec_main(void)
  65 {
  66     int status;
  67     struct pcm_format format;
  68     uint32_t bytesdone, decodedsamples;
  69     uint32_t num_sample_frames = 0;
  70     size_t n;
  71     int bufcount;
  72     int endofstream;
  73     unsigned char *buf;
  74     uint8_t *aifbuf;
  75     uint32_t offset2snd = 0;
  76     off_t firstblockposn;     /* position of the first block in file */
  77     bool is_aifc = false;
  78     const struct pcm_codec *codec;
  79     uint32_t size;
  80
  81     /* Generic codec initialisation */
  82     ci->configure(DSP_SET_SAMPLE_DEPTH, PCM_OUTPUT_DEPTH-1);
  83
  84 next_track:
  85     status = CODEC_OK;
  86
  87     if (codec_init()) {
  88         status = CODEC_ERROR;
  89         goto exit;
  90     }
  91
  92     if (codec_wait_taginfo() != 0)
  93         goto done;
  94
  95     codec_set_replaygain(ci->id3);
  96
  97     /* Need to save offset for later use (cleared indirectly by advance_buffer) */
  98     bytesdone = ci->id3->offset;
  99
 100     /* assume the AIFF header is less than 1024 bytes */
 101     buf = ci->request_buffer(&n, 1024);
 102     if (n < 54) {
 103         status = CODEC_ERROR;
 104         goto done;
 105     }
 106
 107     if (memcmp(buf, "FORM", 4) != 0)
 108     {
 109         DEBUGF("CODEC_ERROR: does not aiff format %4.4s\n", (char*)&buf[0]);
 110         status = CODEC_ERROR;
 111         goto done;
 112     }
 113     if (memcmp(&buf[8], "AIFF", 4) == 0)
 114         is_aifc = false;
 115     else if (memcmp(&buf[8], "AIFC", 4) == 0)
 116         is_aifc = true;
 117     else
 118     {
 119         DEBUGF("CODEC_ERROR: does not aiff format %4.4s\n", (char*)&buf[8]);
 120         status = CODEC_ERROR;
 121         goto done;
 122     }
 123
 124     buf += 12;
 125     n -= 12;
 126
 127     ci->memset(&format, 0, sizeof(struct pcm_format));
 128     format.is_signed = true;
 129     format.is_little_endian = false;
 130
 131     decodedsamples = 0;
 132     codec = 0;
 133
 134     /* read until 'SSND' chunk, which typically is last */
 135     while (format.numbytes == 0 && n >= 8)
 136     {
 137         /* chunkSize */
 138         size = ((buf[4]<<24)|(buf[5]<<16)|(buf[6]<<8)|buf[7]);
 139         if (memcmp(buf, "COMM", 4) == 0) {
 140             if ((!is_aifc && size < 18) || (is_aifc && size < 22))
 141             {
 142                 DEBUGF("CODEC_ERROR: 'COMM' chunk size=%lu < %d\n",
 143                        (unsigned long)size, (is_aifc)?22:18);
 144                 status = CODEC_ERROR;
 145                 goto done;
 146             }
 147             /* num_channels */
 148             format.channels = ((buf[8]<<8)|buf[9]);
 149             /* num_sample_frames */
 150             num_sample_frames = ((buf[10]<<24)|(buf[11]<<16)|(buf[12]<<8)
 151                                 |buf[13]);
 152             /* sample_size */
 153             format.bitspersample = ((buf[14]<<8)|buf[15]);
 154             /* sample_rate (don't use last 4 bytes, only integer fs) */
 155             if (buf[16] != 0x40) {
 156                 DEBUGF("CODEC_ERROR: weird sampling rate (no @)\n");
 157                 status = CODEC_ERROR;
 158                 goto done;
 159             }
 160             format.samplespersec = ((buf[18]<<24)|(buf[19]<<16)|(buf[20]<<8)|buf[21])+1;
 161             format.samplespersec >>= (16 + 14 - buf[17]);
 162             /* compressionType (AIFC only) */
 163             if (is_aifc)
 164             {
 165                 format.formattag = (buf[26]<<24)|(buf[27]<<16)|(buf[28]<<8)|buf[29];
 166
 167                 /*
 168                  * aiff's sample_size is uncompressed sound data size.
 169                  * But format.bitspersample is compressed sound data size.
 170                  */
 171                 if (format.formattag == AIFC_FORMAT_ALAW ||
 172                     format.formattag == AIFC_FORMAT_MULAW)
 173                     format.bitspersample = 8;
 174                 else if (format.formattag == AIFC_FORMAT_QT_IMA_ADPCM)
 175                     format.bitspersample = 4;
 176             }
 177             else
 178                 format.formattag = AIFC_FORMAT_PCM;
 179             /* calc average bytes per second */
 180             format.avgbytespersec = format.samplespersec*format.channels*format.bitspersample/8;
 181         } else if (memcmp(buf, "SSND", 4)==0) {
 182             if (format.bitspersample == 0) {
 183                 DEBUGF("CODEC_ERROR: unsupported chunk order\n");
 184                 status = CODEC_ERROR;
 185                 goto done;
 186             }
 187             /* offset2snd */
 188             offset2snd = (buf[8]<<24)|(buf[9]<<16)|(buf[10]<<8)|buf[11];
 189             /* block_size */
 190             format.blockalign = ((buf[12]<<24)|(buf[13]<<16)|(buf[14]<<8)|buf[15]) >> 3;
 191             if (format.blockalign == 0)
 192                 format.blockalign = format.channels * format.bitspersample >> 3;
 193             format.numbytes = size - 8 - offset2snd;
 194             size = 8 + offset2snd; /* advance to the beginning of data */
 195         } else if (is_aifc && (memcmp(buf, "FVER", 4)==0)) {
 196             /* Format Version Chunk (AIFC only chunk) */
 197             /* skip this chunk */
 198         } else {
 199             DEBUGF("unsupported AIFF chunk: '%c%c%c%c', size=%lu\n",
 200                    buf[0], buf[1], buf[2], buf[3], (unsigned long)size);
 201         }
 202
 203         size += 8 + (size & 0x01); /* odd chunk sizes must be padded */
 204
 205         buf += size;
 206         if (n < size) {
 207             DEBUGF("CODEC_ERROR: AIFF header size > 1024\n");
 208             status = CODEC_ERROR;
 209             goto done;
 210         }
 211         n -= size;
 212     } /* while 'SSND' */
 213
 214     if (format.channels == 0) {
 215         DEBUGF("CODEC_ERROR: 'COMM' chunk not found or 0-channels file\n");
 216         status = CODEC_ERROR;
 217         goto done;
 218     }
 219     if (format.numbytes == 0) {
 220         DEBUGF("CODEC_ERROR: 'SSND' chunk not found or has zero length\n");
 221         status = CODEC_ERROR;
 222         goto done;
 223     }
 224
 225     codec = get_codec(format.formattag);
 226     if (codec == 0)
 227     {
 228         DEBUGF("CODEC_ERROR: AIFC does not support compressionType: 0x%x\n",
 229             (unsigned int)format.formattag);
 230         status = CODEC_ERROR;
 231         goto done;
 232     }
 233
 234     if (!codec->set_format(&format))
 235     {
 236         status = CODEC_ERROR;
 237         goto done;
 238     }
 239
 240     ci->configure(DSP_SWITCH_FREQUENCY, ci->id3->frequency);
 241
 242     if (format.channels == 2) {
 243         ci->configure(DSP_SET_STEREO_MODE, STEREO_INTERLEAVED);
 244     } else if (format.channels == 1) {
 245         ci->configure(DSP_SET_STEREO_MODE, STEREO_MONO);
 246     } else {
 247         DEBUGF("CODEC_ERROR: more than 2 channels unsupported\n");
 248         status = CODEC_ERROR;
 249         goto done;
 250     }
 251
 252     if (format.samplesperblock == 0)
 253     {
 254         DEBUGF("CODEC_ERROR: samplesperblock is 0\n");
 255         status = CODEC_ERROR;
 256         goto done;
 257     }
 258     if (format.blockalign == 0)
 259     {
 260         DEBUGF("CODEC_ERROR: blockalign is 0\n");
 261         status = CODEC_ERROR;
 262         goto done;
 263     }
 264
 265     /* check chunksize */
 266     if ((format.chunksize / format.blockalign) * format.samplesperblock * format.channels
 267            > PCM_SAMPLE_SIZE)
 268         format.chunksize = (PCM_SAMPLE_SIZE / format.blockalign) * format.blockalign;
 269     if (format.chunksize == 0)
 270     {
 271         DEBUGF("CODEC_ERROR: chunksize is 0\n");
 272         status = CODEC_ERROR;
 273         goto done;
 274     }
 275
 276     firstblockposn = 1024 - n;
 277     ci->advance_buffer(firstblockposn);
 278
 279     /* make sure we're at the correct offset */
 280     if (bytesdone > (uint32_t) firstblockposn) {
 281         /* Round down to previous block */
 282         struct pcm_pos *newpos = codec->get_seek_pos(bytesdone - firstblockposn,
 283                                                      PCM_SEEK_POS, NULL);
 284
 285         if (newpos->pos > format.numbytes)
 286             goto done;
 287         if (ci->seek_buffer(firstblockposn + newpos->pos))
 288         {
 289             bytesdone      = newpos->pos;
 290             decodedsamples = newpos->samples;
 291         }
 292         ci->seek_complete();
 293     } else {
 294         /* already where we need to be */
 295         bytesdone = 0;
 296     }
 297
 298     /* The main decoder loop */
 299     endofstream = 0;
 300
 301     while (!endofstream) {
 302         ci->yield();
 303         if (ci->stop_codec || ci->new_track)
 304             break;
 305
 306         if (ci->seek_time) {
 307             /* 3rd args(read_buffer) is unnecessary in the format which AIFF supports. */
 308             struct pcm_pos *newpos = codec->get_seek_pos(ci->seek_time, PCM_SEEK_TIME, NULL);
 309
 310             if (newpos->pos > format.numbytes)
 311                 break;
 312             if (ci->seek_buffer(firstblockposn + newpos->pos))
 313             {
 314                 bytesdone      = newpos->pos;
 315                 decodedsamples = newpos->samples;
 316             }
 317             ci->seek_complete();
 318         }
 319         aifbuf = (uint8_t *)ci->request_buffer(&n, format.chunksize);
 320
 321         if (n == 0)
 322             break; /* End of stream */
 323
 324         if (bytesdone + n > format.numbytes) {
 325             n = format.numbytes - bytesdone;
 326             endofstream = 1;
 327         }
 328
 329         status = codec->decode(aifbuf, n, samples, &bufcount);
 330         if (status == CODEC_ERROR)
 331         {
 332             DEBUGF("codec error\n");
 333             goto done;
 334         }
 335
 336         ci->pcmbuf_insert(samples, NULL, bufcount);
 337
 338         ci->advance_buffer(n);
 339         bytesdone += n;
 340         decodedsamples += bufcount;
 341         if (bytesdone >= format.numbytes)
 342             endofstream = 1;
 343
 344         ci->set_elapsed(decodedsamples*1000LL/ci->id3->frequency);
 345     }
 346     status = CODEC_OK;
 347
 348 done:
 349     if (ci->request_next_track())
 350         goto next_track;
 351
 352 exit:
 353     return status;
 354 }
 355