apps/codecs/wav64.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2010 Yoshihisa Uchida
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21
  22 #include "codeclib.h"
  23 #include "codecs/libpcm/support_formats.h"
  24
  25 CODEC_HEADER
  26
  27 /* Wave64 codec
  28  *
  29  * References
  30  * [1] VCS Aktiengesellschaft, Sony Wave64, Informations_about_Sony_Wave64.pdf
  31  */
  32
  33 #define PCM_SAMPLE_SIZE (4096*2)
  34
  35 static int32_t samples[PCM_SAMPLE_SIZE] IBSS_ATTR;
  36
  37 /* Wave64 GUIDs */
  38 #define WAVE64_GUID_RIFF "riff\x2e\x91\xcf\x11\xa5\xd6\x28\xdb\x04\xc1\x00\x00"
  39 #define WAVE64_GUID_WAVE "wave\xf3\xac\xd3\x11\x8c\xd1\x00\xc0\x4f\x8e\xdb\x8a"
  40 #define WAVE64_GUID_FMT  "fmt \xf3\xac\xd3\x11\x8c\xd1\x00\xc0\x4f\x8e\xdb\x8a"
  41 #define WAVE64_GUID_FACT "fact\xf3\xac\xd3\x11\x8c\xd1\x00\xc0\x4f\x8e\xdb\x8a"
  42 #define WAVE64_GUID_DATA "data\xf3\xac\xd3\x11\x8c\xd1\x00\xc0\x4f\x8e\xdb\x8a"
  43
  44 /* This codec support WAVE files with the following formats: */
  45 enum
  46 {
  47     WAVE_FORMAT_UNKNOWN = 0x0000, /* Microsoft Unknown Wave Format */
  48     WAVE_FORMAT_PCM = 0x0001,   /* Microsoft PCM Format */
  49     WAVE_FORMAT_ADPCM = 0x0002, /* Microsoft ADPCM Format */
  50     WAVE_FORMAT_IEEE_FLOAT = 0x0003, /* IEEE Float */
  51     WAVE_FORMAT_ALAW = 0x0006,  /* Microsoft ALAW */
  52     WAVE_FORMAT_MULAW = 0x0007, /* Microsoft MULAW */
  53     WAVE_FORMAT_DVI_ADPCM = 0x0011, /* Intel's DVI ADPCM */
  54     WAVE_FORMAT_DIALOGIC_OKI_ADPCM = 0x0017, /* Dialogic OKI ADPCM */
  55     WAVE_FORMAT_YAMAHA_ADPCM = 0x0020, /* Yamaha ADPCM */
  56     WAVE_FORMAT_XBOX_ADPCM = 0x0069, /* XBOX ADPCM */
  57     IBM_FORMAT_MULAW = 0x0101,  /* same as WAVE_FORMAT_MULAW */
  58     IBM_FORMAT_ALAW = 0x0102,   /* same as WAVE_FORMAT_ALAW */
  59     WAVE_FORMAT_SWF_ADPCM = 0x5346, /* Adobe SWF ADPCM */
  60     WAVE_FORMAT_EXTENSIBLE = 0xFFFE
  61 };
  62
  63 const struct pcm_entry wave_codecs[] = {
  64     { WAVE_FORMAT_UNKNOWN,            0                            },
  65     { WAVE_FORMAT_PCM,                get_linear_pcm_codec         },
  66     { WAVE_FORMAT_ADPCM,              get_ms_adpcm_codec           },
  67     { WAVE_FORMAT_IEEE_FLOAT,         get_ieee_float_codec         },
  68     { WAVE_FORMAT_ALAW,               get_itut_g711_alaw_codec     },
  69     { WAVE_FORMAT_MULAW,              get_itut_g711_mulaw_codec    },
  70     { WAVE_FORMAT_DVI_ADPCM,          get_dvi_adpcm_codec          },
  71     { WAVE_FORMAT_DIALOGIC_OKI_ADPCM, get_dialogic_oki_adpcm_codec },
  72     { WAVE_FORMAT_YAMAHA_ADPCM,       get_yamaha_adpcm_codec       },
  73     { WAVE_FORMAT_XBOX_ADPCM,         get_dvi_adpcm_codec          },
  74     { IBM_FORMAT_MULAW,               get_itut_g711_mulaw_codec    },
  75     { IBM_FORMAT_ALAW,                get_itut_g711_alaw_codec     },
  76     { WAVE_FORMAT_SWF_ADPCM,          get_swf_adpcm_codec          },
  77 };
  78
  79 #define NUM_FORMATS 13
  80
  81 static const struct pcm_codec *get_wave_codec(uint32_t formattag)
  82 {
  83     int i;
  84
  85     for (i = 0; i < NUM_FORMATS; i++)
  86     {
  87         if (wave_codecs[i].format_tag == formattag)
  88         {
  89             if (wave_codecs[i].get_codec)
  90                 return wave_codecs[i].get_codec();
  91             return 0;
  92         }
  93     }
  94     return 0;
  95 }
  96
  97 static struct pcm_format format;
  98 static uint32_t bytesdone;
  99
 100 /* Read an unaligned 64-bit little endian unsigned integer from buffer. */
 101 static uint64_t get_uint64_le(void* buf)
 102 {
 103     unsigned char* p = (unsigned char*) buf;
 104
 105     return p[0] | (p[1] << 8)  | (p[2] << 16) | (p[3] << 24) | ((uint64_t)p[4] << 32) |
 106                   ((uint64_t)p[5] << 40) | ((uint64_t)p[6] << 48) | ((uint64_t)p[7] << 56);
 107 }
 108
 109 static bool set_msadpcm_coeffs(unsigned char *buf)
 110 {
 111     int i;
 112     int num;
 113     uint64_t size;
 114
 115     buf += 16; /* skip 'fmt ' GUID */
 116     size = get_uint64_le(buf);
 117     if (size < 50)
 118     {
 119         DEBUGF("CODEC_ERROR: microsoft adpcm 'fmt ' chunk size=%d < 50\n", (int)size);
 120         return false;
 121     }
 122
 123     /* get nNumCoef */
 124     buf += 28;
 125     num = buf[0] | (buf[1] << 8);
 126
 127     /*
 128      * In many case, nNumCoef is 7.
 129      * Depending upon the encoder, as for this value there is a possibility of
 130      * increasing more.
 131      * If you found the file where this value exceeds 7, please report.
 132      */
 133     if (num != MSADPCM_NUM_COEFF)
 134     {
 135         DEBUGF("CODEC_ERROR: microsoft adpcm nNumCoef=%d != 7\n", num);
 136         return false;
 137     }
 138
 139     /* get aCoeffs */
 140     buf += 2;
 141     for (i = 0; i < MSADPCM_NUM_COEFF; i++)
 142     {
 143         format.coeffs[i][0] = buf[0] | (SE(buf[1]) << 8);
 144         format.coeffs[i][1] = buf[2] | (SE(buf[3]) << 8);
 145         buf += 4;
 146     }
 147
 148     return true;
 149 }
 150
 151 static uint8_t *read_buffer(size_t *realsize)
 152 {
 153     uint8_t *buffer = (uint8_t *)ci->request_buffer(realsize, format.chunksize);
 154     if (bytesdone + (*realsize) > format.numbytes)
 155         *realsize = format.numbytes - bytesdone;
 156     bytesdone += *realsize;
 157     ci->advance_buffer(*realsize);
 158     return buffer;
 159 }
 160
 161 /* this is the codec entry point */
 162 enum codec_status codec_main(void)
 163 {
 164     int status = CODEC_OK;
 165     uint32_t decodedsamples;
 166     uint32_t i;
 167     size_t n;
 168     int bufcount;
 169     int endofstream;
 170     unsigned char *buf;
 171     uint8_t *wavbuf;
 172     off_t firstblockposn;     /* position of the first block in file */
 173     const struct pcm_codec *codec;
 174     uint64_t size;
 175
 176     /* Generic codec initialisation */
 177     ci->configure(DSP_SET_SAMPLE_DEPTH, PCM_OUTPUT_DEPTH);
 178
 179 next_track:
 180     if (codec_init()) {
 181         DEBUGF("codec_init() error\n");
 182         status = CODEC_ERROR;
 183         goto exit;
 184     }
 185
 186     while (!*ci->taginfo_ready && !ci->stop_codec)
 187         ci->sleep(1);
 188
 189     codec_set_replaygain(ci->id3);
 190
 191     /* Need to save offset for later use (cleared indirectly by advance_buffer) */
 192     bytesdone = ci->id3->offset;
 193
 194     /* get RIFF chunk header */
 195     buf = ci->request_buffer(&n, 40);
 196     if (n < 40) {
 197         DEBUGF("request_buffer error\n");
 198         status = CODEC_ERROR;
 199         goto done;
 200     }
 201     if ((memcmp(buf   , WAVE64_GUID_RIFF, 16) != 0) ||
 202         (memcmp(buf+24, WAVE64_GUID_WAVE, 16) != 0))
 203     {
 204         status = CODEC_ERROR;
 205         goto done;
 206     }
 207
 208     /* advance to first WAVE chunk */
 209     ci->advance_buffer(40);
 210
 211     firstblockposn = 40;
 212     ci->memset(&format, 0, sizeof(struct pcm_format));
 213     format.is_signed = true;
 214     format.is_little_endian = true;
 215
 216     decodedsamples = 0;
 217     codec = 0;
 218
 219     /* iterate over WAVE chunks until the 'data' chunk, which should be after the 'fmt ' chunk */
 220     while (true) {
 221         /* get WAVE chunk header */
 222         buf = ci->request_buffer(&n, 1024);
 223         if (n < 8) {
 224             DEBUGF("data chunk request_buffer error\n");
 225             /* no more chunks, 'data' chunk must not have been found */
 226             status = CODEC_ERROR;
 227             goto done;
 228         }
 229
 230         /* chunkSize */
 231         size = get_uint64_le(buf+16) - 24;
 232         if (memcmp(buf, WAVE64_GUID_FMT, 16) == 0) {
 233             if (size < 16) {
 234                 DEBUGF("CODEC_ERROR: 'fmt ' chunk size=%d < 16\n", (int)size);
 235                 status = CODEC_ERROR;
 236                 goto done;
 237             }
 238             /* wFormatTag */
 239             format.formattag=buf[24]|(buf[25]<<8);
 240             /* wChannels */
 241             format.channels=buf[26]|(buf[27]<<8);
 242             /* skipping dwSamplesPerSec */
 243             /* skipping dwAvgBytesPerSec */
 244             /* wBlockAlign */
 245             format.blockalign=buf[36]|(buf[37]<<8);
 246             /* wBitsPerSample */
 247             format.bitspersample=buf[38]|(buf[39]<<8);
 248             if (format.formattag != WAVE_FORMAT_PCM) {
 249                 if (size < 18) {
 250                     /* this is not a fatal error with some formats,
 251                      * we'll see later if we can't decode it */
 252                     DEBUGF("CODEC_WARNING: non-PCM WAVE (formattag=0x%x) "
 253                            "doesn't have ext. fmt descr (chunksize=%d<18).\n",
 254                            (unsigned int)format.formattag, (int)size);
 255                 }
 256                 else
 257                 {
 258                     format.size = buf[40]|(buf[41]<<8);
 259                     if (format.formattag != WAVE_FORMAT_EXTENSIBLE)
 260                         format.samplesperblock = buf[42]|(buf[43]<<8);
 261                     else {
 262                         if (format.size < 22) {
 263                             DEBUGF("CODEC_ERROR: WAVE_FORMAT_EXTENSIBLE is "
 264                                    "missing extension\n");
 265                             status = CODEC_ERROR;
 266                             goto done;
 267                         }
 268                         /* wValidBitsPerSample */
 269                         format.bitspersample = buf[42]|(buf[43]<<8);
 270                         /* skipping dwChannelMask (4bytes) */
 271                         /* SubFormat (only get the first two bytes) */
 272                         format.formattag = buf[48]|(buf[49]<<8);
 273                     }
 274                 }
 275             }
 276
 277             /* msadpcm specific */
 278             if (format.formattag == WAVE_FORMAT_ADPCM)
 279             {
 280                 if (!set_msadpcm_coeffs(buf))
 281                 {
 282                     status = CODEC_ERROR;
 283                     goto done;
 284                 }
 285             }
 286
 287             /* get codec */
 288             codec = get_wave_codec(format.formattag);
 289             if (!codec)
 290             {
 291                 DEBUGF("CODEC_ERROR: unsupported wave format 0x%x\n",
 292                     (unsigned int) format.formattag);
 293                 status = CODEC_ERROR;
 294                 goto done;
 295             }
 296
 297             /* riff 8bit linear pcm is unsigned */
 298             if (format.formattag == WAVE_FORMAT_PCM && format.bitspersample == 8)
 299                 format.is_signed = false;
 300
 301             /* check format, and calculate chunk size */
 302             if (!codec->set_format(&format))
 303             {
 304                 status = CODEC_ERROR;
 305                 goto done;
 306             }
 307         } else if (memcmp(buf, WAVE64_GUID_DATA, 16) == 0) {
 308             format.numbytes = size;
 309             /* advance to start of data */
 310             ci->advance_buffer(24);
 311             firstblockposn += 24;
 312             break;
 313         } else if (memcmp(buf, WAVE64_GUID_FACT, 16) == 0) {
 314             /* skip 'fact' chunk */
 315         } else {
 316             DEBUGF("unknown Wave64 chunk: "
 317                    "'%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x'\n",
 318                    buf[0], buf[1], buf[ 2], buf[ 3], buf[ 4], buf[ 5], buf[ 6], buf[ 7],
 319                    buf[8], buf[9], buf[10], buf[11], buf[12], buf[13], buf[14], buf[15]);
 320         }
 321
 322         /* go to next chunk (8byte bound) */
 323         if (size & 0x07)
 324             size += 8 - (size & 0x7);
 325         ci->advance_buffer(size + 24);
 326         firstblockposn += size + 24;
 327     }
 328
 329     if (!codec)
 330     {
 331         DEBUGF("CODEC_ERROR: 'fmt ' chunk not found\n");
 332         status = CODEC_ERROR;
 333         goto done;
 334     }
 335
 336     /* common format check */
 337     if (format.channels == 0) {
 338         DEBUGF("CODEC_ERROR: 'fmt ' chunk not found or 0-channels file\n");
 339         status = CODEC_ERROR;
 340         goto done;
 341     }
 342     if (format.samplesperblock == 0) {
 343         DEBUGF("CODEC_ERROR: 'fmt ' chunk not found or 0-wSamplesPerBlock file\n");
 344         status = CODEC_ERROR;
 345         goto done;
 346     }
 347     if (format.blockalign == 0)
 348     {
 349         DEBUGF("CODEC_ERROR: 'fmt ' chunk not found or 0-blockalign file\n");
 350         i = CODEC_ERROR;
 351         goto done;
 352     }
 353     if (format.numbytes == 0) {
 354         DEBUGF("CODEC_ERROR: 'data' chunk not found or has zero-length\n");
 355         status = CODEC_ERROR;
 356         goto done;
 357     }
 358
 359     /* check chunksize */
 360     if ((format.chunksize / format.blockalign) * format.samplesperblock * format.channels
 361            > PCM_SAMPLE_SIZE)
 362         format.chunksize = (PCM_SAMPLE_SIZE / format.blockalign) * format.blockalign;
 363     if (format.chunksize == 0)
 364     {
 365         DEBUGF("CODEC_ERROR: chunksize is 0\n");
 366         i = CODEC_ERROR;
 367         goto done;
 368     }
 369
 370     ci->configure(DSP_SWITCH_FREQUENCY, ci->id3->frequency);
 371     if (format.channels == 2) {
 372         ci->configure(DSP_SET_STEREO_MODE, STEREO_INTERLEAVED);
 373     } else if (format.channels == 1) {
 374         ci->configure(DSP_SET_STEREO_MODE, STEREO_MONO);
 375     } else {
 376         DEBUGF("CODEC_ERROR: more than 2 channels\n");
 377         status = CODEC_ERROR;
 378         goto done;
 379     }
 380
 381     /* make sure we're at the correct offset */
 382     if (bytesdone > (uint32_t) firstblockposn) {
 383         /* Round down to previous block */
 384         uint32_t offset = bytesdone - bytesdone % format.blockalign;
 385
 386         ci->advance_buffer(offset-firstblockposn);
 387         bytesdone = offset - firstblockposn;
 388     } else {
 389         /* already where we need to be */
 390         bytesdone = 0;
 391     }
 392
 393     /* The main decoder loop */
 394     endofstream = 0;
 395
 396     while (!endofstream) {
 397         ci->yield();
 398         if (ci->stop_codec || ci->new_track) {
 399             break;
 400         }
 401
 402         if (ci->seek_time) {
 403             struct pcm_pos *newpos = codec->get_seek_pos(ci->seek_time, &read_buffer);
 404
 405             decodedsamples = newpos->samples;
 406             if (newpos->pos > format.numbytes)
 407                 break;
 408             if (ci->seek_buffer(firstblockposn + newpos->pos))
 409             {
 410                 bytesdone = newpos->pos;
 411             }
 412             ci->seek_complete();
 413         }
 414
 415         wavbuf = (uint8_t *)ci->request_buffer(&n, format.chunksize);
 416         if (n == 0)
 417             break; /* End of stream */
 418         if (bytesdone + n > format.numbytes) {
 419             n = format.numbytes - bytesdone;
 420             endofstream = 1;
 421         }
 422
 423         status = codec->decode(wavbuf, n, samples, &bufcount);
 424         if (status == CODEC_ERROR)
 425         {
 426             DEBUGF("codec error\n");
 427             goto done;
 428         }
 429
 430         ci->pcmbuf_insert(samples, NULL, bufcount);
 431         ci->advance_buffer(n);
 432         bytesdone += n;
 433         decodedsamples += bufcount;
 434
 435         if (bytesdone >= format.numbytes)
 436             endofstream = 1;
 437         ci->set_elapsed(decodedsamples*1000LL/ci->id3->frequency);
 438     }
 439     status = CODEC_OK;
 440
 441 done:
 442     if (ci->request_next_track())
 443         goto next_track;
 444
 445 exit:
 446     return status;
 447 }