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