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 };
  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 };
  48
  49 #define NUM_FORMATS 5
  50
  51 static int32_t samples[PCM_CHUNK_SIZE] IBSS_ATTR;
  52
  53 static const struct pcm_codec *get_codec(uint32_t formattag)
  54 {
  55     int i;
  56
  57     for (i = 0; i < NUM_FORMATS; i++)
  58     {
  59         if (pcm_codecs[i].format_tag == formattag)
  60         {
  61             if (pcm_codecs[i].get_codec)
  62                 return pcm_codecs[i].get_codec();
  63             return 0;
  64         }
  65     }
  66     return 0;
  67 }
  68
  69 enum codec_status codec_main(void)
  70 {
  71     int status = CODEC_OK;
  72     struct pcm_format format;
  73     uint32_t bytesdone, decodedbytes;
  74     uint32_t num_sample_frames = 0;
  75     uint32_t i = CODEC_OK;
  76     size_t n;
  77     int bufcount;
  78     int endofstream;
  79     unsigned char *buf;
  80     uint8_t *aifbuf;
  81     uint32_t offset2snd = 0;
  82     off_t firstblockposn;     /* position of the first block in file */
  83     bool is_aifc = false;
  84     const struct pcm_codec *codec;
  85
  86     /* Generic codec initialisation */
  87     ci->configure(DSP_SET_SAMPLE_DEPTH, 28);
  88
  89 next_track:
  90     if (codec_init()) {
  91         i = CODEC_ERROR;
  92         goto exit;
  93     }
  94
  95     while (!*ci->taginfo_ready && !ci->stop_codec)
  96         ci->sleep(1);
  97
  98     codec_set_replaygain(ci->id3);
  99
 100     /* assume the AIFF header is less than 1024 bytes */
 101     buf = ci->request_buffer(&n, 1024);
 102     if (n < 54) {
 103         i = CODEC_ERROR;
 104         goto done;
 105     }
 106
 107     if (memcmp(buf, "FORM", 4) != 0)
 108     {
 109         DEBUGF("CODEC_ERROR: does not aiff format %c%c%c%c\n", buf[0], buf[1], buf[2], buf[3]);
 110         i = 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 %c%c%c%c\n", buf[8], buf[9], buf[10], buf[11]);
 120         i = 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     decodedbytes = 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         i = ((buf[4]<<24)|(buf[5]<<16)|(buf[6]<<8)|buf[7]);
 139         if (memcmp(buf, "COMM", 4) == 0) {
 140             if ((!is_aifc && i < 18) || (is_aifc && i < 22))
 141             {
 142                 DEBUGF("CODEC_ERROR: 'COMM' chunk size=%lu < %d\n",
 143                        (unsigned long)i, (is_aifc)?22:18);
 144                 i = 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                 i = 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 || format.formattag == AIFC_FORMAT_MULAW)
 172                     format.bitspersample = 8;
 173             }
 174             else
 175                 format.formattag = AIFC_FORMAT_PCM;
 176             /* calc average bytes per second */
 177             format.avgbytespersec = format.samplespersec*format.channels*format.bitspersample/8;
 178         } else if (memcmp(buf, "SSND", 4)==0) {
 179             if (format.bitspersample == 0) {
 180                 DEBUGF("CODEC_ERROR: unsupported chunk order\n");
 181                 i = CODEC_ERROR;
 182                 goto done;
 183             }
 184             /* offset2snd */
 185             offset2snd = (buf[8]<<24)|(buf[9]<<16)|(buf[10]<<8)|buf[11];
 186             /* block_size */
 187             format.blockalign = (buf[12]<<24)|(buf[13]<<16)|(buf[14]<<8)|buf[15];
 188             if (format.blockalign == 0)
 189                 format.blockalign = format.channels*format.bitspersample;
 190             format.numbytes = i - 8 - offset2snd;
 191             i = 8 + offset2snd; /* advance to the beginning of data */
 192         } else if (is_aifc && (memcmp(buf, "FVER", 4)==0)) {
 193             /* Format Version Chunk (AIFC only chunk) */
 194             /* skip this chunk */
 195         } else {
 196             DEBUGF("unsupported AIFF chunk: '%c%c%c%c', size=%lu\n",
 197                    buf[0], buf[1], buf[2], buf[3], (unsigned long)i);
 198         }
 199
 200         if (i & 0x01) /* odd chunk sizes must be padded */
 201             i++;
 202         buf += i + 8;
 203         if (n < (i + 8)) {
 204             DEBUGF("CODEC_ERROR: AIFF header size > 1024\n");
 205             i = CODEC_ERROR;
 206             goto done;
 207         }
 208         n -= i + 8;
 209     } /* while 'SSND' */
 210
 211     if (format.channels == 0) {
 212         DEBUGF("CODEC_ERROR: 'COMM' chunk not found or 0-channels file\n");
 213         i = CODEC_ERROR;
 214         goto done;
 215     }
 216     if (format.numbytes == 0) {
 217         DEBUGF("CODEC_ERROR: 'SSND' chunk not found or has zero length\n");
 218         i = CODEC_ERROR;
 219         goto done;
 220     }
 221
 222     codec = get_codec(format.formattag);
 223     if (codec == 0)
 224     {
 225         DEBUGF("CODEC_ERROR: AIFC does not support compressionType: 0x%x\n",
 226             (unsigned int)format.formattag);
 227         i = CODEC_ERROR;
 228         goto done;
 229     }
 230
 231     if (!codec->set_format(&format, 0))
 232     {
 233         i = CODEC_ERROR;
 234         goto done;
 235     }
 236
 237     ci->configure(DSP_SWITCH_FREQUENCY, ci->id3->frequency);
 238
 239     if (format.channels == 2) {
 240         ci->configure(DSP_SET_STEREO_MODE, STEREO_INTERLEAVED);
 241     } else if (format.channels == 1) {
 242         ci->configure(DSP_SET_STEREO_MODE, STEREO_MONO);
 243     } else {
 244         DEBUGF("CODEC_ERROR: more than 2 channels unsupported\n");
 245         i = CODEC_ERROR;
 246         goto done;
 247     }
 248
 249     firstblockposn = 1024 - n;
 250     ci->advance_buffer(firstblockposn);
 251
 252     /* The main decoder loop */
 253     bytesdone = 0;
 254     ci->set_elapsed(0);
 255     endofstream = 0;
 256
 257     while (!endofstream) {
 258         ci->yield();
 259         if (ci->stop_codec || ci->new_track)
 260             break;
 261
 262         if (ci->seek_time) {
 263             uint32_t newpos = codec->get_seek_pos(ci->seek_time);
 264             if (newpos > format.numbytes)
 265                 break;
 266             if (ci->seek_buffer(firstblockposn + newpos))
 267                 bytesdone = newpos;
 268             ci->seek_complete();
 269         }
 270         aifbuf = (uint8_t *)ci->request_buffer(&n, format.chunksize);
 271
 272         if (n == 0)
 273             break; /* End of stream */
 274
 275         if (bytesdone + n > format.numbytes) {
 276             n = format.numbytes - bytesdone;
 277             endofstream = 1;
 278         }
 279
 280         status = codec->decode(aifbuf, n, samples, &bufcount);
 281         if (status == CODEC_ERROR)
 282         {
 283             DEBUGF("codec error\n");
 284             goto done;
 285         }
 286
 287         ci->pcmbuf_insert(samples, NULL, bufcount);
 288
 289         ci->advance_buffer(n);
 290         bytesdone += n;
 291         decodedbytes += bufcount;
 292         if (bytesdone >= format.numbytes)
 293             endofstream = 1;
 294
 295         ci->set_elapsed(decodedbytes*1000LL/ci->id3->frequency);
 296     }
 297     i = CODEC_OK;
 298
 299 done:
 300     if (ci->request_next_track())
 301         goto next_track;
 302
 303 exit:
 304     return i;
 305 }
 306