libavcodec/pcm.c

   1 /*
   2  * PCM codecs
   3  * Copyright (c) 2001 Fabrice Bellard.
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 /**
  23  * @file pcm.c
  24  * PCM codecs
  25  */
  26
  27 #include "avcodec.h"
  28 #include "bitstream.h" // for ff_reverse
  29 #include "bytestream.h"
  30
  31 #define MAX_CHANNELS 64
  32
  33 /* from g711.c by SUN microsystems (unrestricted use) */
  34
  35 #define         SIGN_BIT        (0x80)      /* Sign bit for a A-law byte. */
  36 #define         QUANT_MASK      (0xf)       /* Quantization field mask. */
  37 #define         NSEGS           (8)         /* Number of A-law segments. */
  38 #define         SEG_SHIFT       (4)         /* Left shift for segment number. */
  39 #define         SEG_MASK        (0x70)      /* Segment field mask. */
  40
  41 #define         BIAS            (0x84)      /* Bias for linear code. */
  42
  43 /*
  44  * alaw2linear() - Convert an A-law value to 16-bit linear PCM
  45  *
  46  */
  47 static av_cold int alaw2linear(unsigned char a_val)
  48 {
  49         int t;
  50         int seg;
  51
  52         a_val ^= 0x55;
  53
  54         t = a_val & QUANT_MASK;
  55         seg = ((unsigned)a_val & SEG_MASK) >> SEG_SHIFT;
  56         if(seg) t= (t + t + 1 + 32) << (seg + 2);
  57         else    t= (t + t + 1     ) << 3;
  58
  59         return (a_val & SIGN_BIT) ? t : -t;
  60 }
  61
  62 static av_cold int ulaw2linear(unsigned char u_val)
  63 {
  64         int t;
  65
  66         /* Complement to obtain normal u-law value. */
  67         u_val = ~u_val;
  68
  69         /*
  70          * Extract and bias the quantization bits. Then
  71          * shift up by the segment number and subtract out the bias.
  72          */
  73         t = ((u_val & QUANT_MASK) << 3) + BIAS;
  74         t <<= ((unsigned)u_val & SEG_MASK) >> SEG_SHIFT;
  75
  76         return (u_val & SIGN_BIT) ? (BIAS - t) : (t - BIAS);
  77 }
  78
  79 /* 16384 entries per table */
  80 static uint8_t linear_to_alaw[16384];
  81 static uint8_t linear_to_ulaw[16384];
  82
  83 static av_cold void build_xlaw_table(uint8_t *linear_to_xlaw,
  84                              int (*xlaw2linear)(unsigned char),
  85                              int mask)
  86 {
  87     int i, j, v, v1, v2;
  88
  89     j = 0;
  90     for(i=0;i<128;i++) {
  91         if (i != 127) {
  92             v1 = xlaw2linear(i ^ mask);
  93             v2 = xlaw2linear((i + 1) ^ mask);
  94             v = (v1 + v2 + 4) >> 3;
  95         } else {
  96             v = 8192;
  97         }
  98         for(;j<v;j++) {
  99             linear_to_xlaw[8192 + j] = (i ^ mask);
 100             if (j > 0)
 101                 linear_to_xlaw[8192 - j] = (i ^ (mask ^ 0x80));
 102         }
 103     }
 104     linear_to_xlaw[0] = linear_to_xlaw[1];
 105 }
 106
 107 static av_cold int pcm_encode_init(AVCodecContext *avctx)
 108 {
 109     avctx->frame_size = 1;
 110     switch(avctx->codec->id) {
 111     case CODEC_ID_PCM_ALAW:
 112         build_xlaw_table(linear_to_alaw, alaw2linear, 0xd5);
 113         break;
 114     case CODEC_ID_PCM_MULAW:
 115         build_xlaw_table(linear_to_ulaw, ulaw2linear, 0xff);
 116         break;
 117     default:
 118         break;
 119     }
 120
 121     avctx->bits_per_coded_sample = av_get_bits_per_sample(avctx->codec->id);
 122     avctx->block_align = avctx->channels * avctx->bits_per_coded_sample/8;
 123     avctx->coded_frame= avcodec_alloc_frame();
 124     avctx->coded_frame->key_frame= 1;
 125
 126     return 0;
 127 }
 128
 129 static av_cold int pcm_encode_close(AVCodecContext *avctx)
 130 {
 131     av_freep(&avctx->coded_frame);
 132
 133     return 0;
 134 }
 135
 136 /**
 137  * Write PCM samples macro
 138  * @param type Datatype of native machine format
 139  * @param endian bytestream_put_xxx() suffix
 140  * @param src Source pointer (variable name)
 141  * @param dst Destination pointer (variable name)
 142  * @param n Total number of samples (variable name)
 143  * @param shift Bitshift (bits)
 144  * @param offset Sample value offset
 145  */
 146 #define ENCODE(type, endian, src, dst, n, shift, offset) \
 147     samples_##type = (type*)src; \
 148     for(;n>0;n--) { \
 149         register type v = (*samples_##type++ >> shift) + offset; \
 150         bytestream_put_##endian(&dst, v); \
 151     }
 152
 153 static int pcm_encode_frame(AVCodecContext *avctx,
 154                             unsigned char *frame, int buf_size, void *data)
 155 {
 156     int n, sample_size, v;
 157     short *samples;
 158     unsigned char *dst;
 159     uint8_t *srcu8;
 160     int16_t *samples_int16_t;
 161     int32_t *samples_int32_t;
 162     int64_t *samples_int64_t;
 163     uint16_t *samples_uint16_t;
 164     uint32_t *samples_uint32_t;
 165
 166     sample_size = av_get_bits_per_sample(avctx->codec->id)/8;
 167     n = buf_size / sample_size;
 168     samples = data;
 169     dst = frame;
 170
 171     if (avctx->sample_fmt!=avctx->codec->sample_fmts[0]) {
 172         av_log(avctx, AV_LOG_ERROR, "invalid sample_fmt\n");
 173         return -1;
 174     }
 175
 176     switch(avctx->codec->id) {
 177     case CODEC_ID_PCM_U32LE:
 178         ENCODE(uint32_t, le32, samples, dst, n, 0, 0x80000000)
 179         break;
 180     case CODEC_ID_PCM_U32BE:
 181         ENCODE(uint32_t, be32, samples, dst, n, 0, 0x80000000)
 182         break;
 183     case CODEC_ID_PCM_S24LE:
 184         ENCODE(int32_t, le24, samples, dst, n, 8, 0)
 185         break;
 186     case CODEC_ID_PCM_S24BE:
 187         ENCODE(int32_t, be24, samples, dst, n, 8, 0)
 188         break;
 189     case CODEC_ID_PCM_U24LE:
 190         ENCODE(uint32_t, le24, samples, dst, n, 8, 0x800000)
 191         break;
 192     case CODEC_ID_PCM_U24BE:
 193         ENCODE(uint32_t, be24, samples, dst, n, 8, 0x800000)
 194         break;
 195     case CODEC_ID_PCM_S24DAUD:
 196         for(;n>0;n--) {
 197             uint32_t tmp = ff_reverse[(*samples >> 8) & 0xff] +
 198                            (ff_reverse[*samples & 0xff] << 8);
 199             tmp <<= 4; // sync flags would go here
 200             bytestream_put_be24(&dst, tmp);
 201             samples++;
 202         }
 203         break;
 204     case CODEC_ID_PCM_U16LE:
 205         ENCODE(uint16_t, le16, samples, dst, n, 0, 0x8000)
 206         break;
 207     case CODEC_ID_PCM_U16BE:
 208         ENCODE(uint16_t, be16, samples, dst, n, 0, 0x8000)
 209         break;
 210     case CODEC_ID_PCM_S8:
 211         srcu8= data;
 212         for(;n>0;n--) {
 213             v = *srcu8++;
 214             *dst++ = v - 128;
 215         }
 216         break;
 217 #if WORDS_BIGENDIAN
 218     case CODEC_ID_PCM_F64LE:
 219         ENCODE(int64_t, le64, samples, dst, n, 0, 0)
 220         break;
 221     case CODEC_ID_PCM_S32LE:
 222     case CODEC_ID_PCM_F32LE:
 223         ENCODE(int32_t, le32, samples, dst, n, 0, 0)
 224         break;
 225     case CODEC_ID_PCM_S16LE:
 226         ENCODE(int16_t, le16, samples, dst, n, 0, 0)
 227         break;
 228     case CODEC_ID_PCM_F64BE:
 229     case CODEC_ID_PCM_F32BE:
 230     case CODEC_ID_PCM_S32BE:
 231     case CODEC_ID_PCM_S16BE:
 232 #else
 233     case CODEC_ID_PCM_F64BE:
 234         ENCODE(int64_t, be64, samples, dst, n, 0, 0)
 235         break;
 236     case CODEC_ID_PCM_F32BE:
 237     case CODEC_ID_PCM_S32BE:
 238         ENCODE(int32_t, be32, samples, dst, n, 0, 0)
 239         break;
 240     case CODEC_ID_PCM_S16BE:
 241         ENCODE(int16_t, be16, samples, dst, n, 0, 0)
 242         break;
 243     case CODEC_ID_PCM_F64LE:
 244     case CODEC_ID_PCM_F32LE:
 245     case CODEC_ID_PCM_S32LE:
 246     case CODEC_ID_PCM_S16LE:
 247 #endif /* WORDS_BIGENDIAN */
 248     case CODEC_ID_PCM_U8:
 249         memcpy(dst, samples, n*sample_size);
 250         dst += n*sample_size;
 251         break;
 252     case CODEC_ID_PCM_ZORK:
 253         for(;n>0;n--) {
 254             v= *samples++ >> 8;
 255             if(v<0)   v = -v;
 256             else      v+= 128;
 257             *dst++ = v;
 258         }
 259         break;
 260     case CODEC_ID_PCM_ALAW:
 261         for(;n>0;n--) {
 262             v = *samples++;
 263             *dst++ = linear_to_alaw[(v + 32768) >> 2];
 264         }
 265         break;
 266     case CODEC_ID_PCM_MULAW:
 267         for(;n>0;n--) {
 268             v = *samples++;
 269             *dst++ = linear_to_ulaw[(v + 32768) >> 2];
 270         }
 271         break;
 272     default:
 273         return -1;
 274     }
 275     //avctx->frame_size = (dst - frame) / (sample_size * avctx->channels);
 276
 277     return dst - frame;
 278 }
 279
 280 typedef struct PCMDecode {
 281     short table[256];
 282 } PCMDecode;
 283
 284 static av_cold int pcm_decode_init(AVCodecContext * avctx)
 285 {
 286     PCMDecode *s = avctx->priv_data;
 287     int i;
 288
 289     switch(avctx->codec->id) {
 290     case CODEC_ID_PCM_ALAW:
 291         for(i=0;i<256;i++)
 292             s->table[i] = alaw2linear(i);
 293         break;
 294     case CODEC_ID_PCM_MULAW:
 295         for(i=0;i<256;i++)
 296             s->table[i] = ulaw2linear(i);
 297         break;
 298     default:
 299         break;
 300     }
 301
 302     avctx->sample_fmt = avctx->codec->sample_fmts[0];
 303     return 0;
 304 }
 305
 306 /**
 307  * Read PCM samples macro
 308  * @param type Datatype of native machine format
 309  * @param endian bytestream_get_xxx() endian suffix
 310  * @param src Source pointer (variable name)
 311  * @param dst Destination pointer (variable name)
 312  * @param n Total number of samples (variable name)
 313  * @param shift Bitshift (bits)
 314  * @param offset Sample value offset
 315  */
 316 #define DECODE(type, endian, src, dst, n, shift, offset) \
 317     dst_##type = (type*)dst; \
 318     for(;n>0;n--) { \
 319         register type v = bytestream_get_##endian(&src); \
 320         *dst_##type++ = (v - offset) << shift; \
 321     } \
 322     dst = (short*)dst_##type;
 323
 324 static int pcm_decode_frame(AVCodecContext *avctx,
 325                             void *data, int *data_size,
 326                             const uint8_t *buf, int buf_size)
 327 {
 328     PCMDecode *s = avctx->priv_data;
 329     int sample_size, c, n;
 330     short *samples;
 331     const uint8_t *src, *src8, *src2[MAX_CHANNELS];
 332     uint8_t *dstu8;
 333     int16_t *dst_int16_t;
 334     int32_t *dst_int32_t;
 335     int64_t *dst_int64_t;
 336     uint16_t *dst_uint16_t;
 337     uint32_t *dst_uint32_t;
 338
 339     samples = data;
 340     src = buf;
 341
 342     if (avctx->sample_fmt!=avctx->codec->sample_fmts[0]) {
 343         av_log(avctx, AV_LOG_ERROR, "invalid sample_fmt\n");
 344         return -1;
 345     }
 346
 347     if(avctx->channels <= 0 || avctx->channels > MAX_CHANNELS){
 348         av_log(avctx, AV_LOG_ERROR, "PCM channels out of bounds\n");
 349         return -1;
 350     }
 351
 352     sample_size = av_get_bits_per_sample(avctx->codec_id)/8;
 353
 354     /* av_get_bits_per_sample returns 0 for CODEC_ID_PCM_DVD */
 355     if (CODEC_ID_PCM_DVD == avctx->codec_id)
 356         /* 2 samples are interleaved per block in PCM_DVD */
 357         sample_size = avctx->bits_per_coded_sample * 2 / 8;
 358
 359     n = avctx->channels * sample_size;
 360
 361     if(n && buf_size % n){
 362         av_log(avctx, AV_LOG_ERROR, "invalid PCM packet\n");
 363         return -1;
 364     }
 365
 366     buf_size= FFMIN(buf_size, *data_size/2);
 367     *data_size=0;
 368
 369     n = buf_size/sample_size;
 370
 371     switch(avctx->codec->id) {
 372     case CODEC_ID_PCM_U32LE:
 373         DECODE(uint32_t, le32, src, samples, n, 0, 0x80000000)
 374         break;
 375     case CODEC_ID_PCM_U32BE:
 376         DECODE(uint32_t, be32, src, samples, n, 0, 0x80000000)
 377         break;
 378     case CODEC_ID_PCM_S24LE:
 379         DECODE(int32_t, le24, src, samples, n, 8, 0)
 380         break;
 381     case CODEC_ID_PCM_S24BE:
 382         DECODE(int32_t, be24, src, samples, n, 8, 0)
 383         break;
 384     case CODEC_ID_PCM_U24LE:
 385         DECODE(uint32_t, le24, src, samples, n, 8, 0x800000)
 386         break;
 387     case CODEC_ID_PCM_U24BE:
 388         DECODE(uint32_t, be24, src, samples, n, 8, 0x800000)
 389         break;
 390     case CODEC_ID_PCM_S24DAUD:
 391         for(;n>0;n--) {
 392           uint32_t v = bytestream_get_be24(&src);
 393           v >>= 4; // sync flags are here
 394           *samples++ = ff_reverse[(v >> 8) & 0xff] +
 395                        (ff_reverse[v & 0xff] << 8);
 396         }
 397         break;
 398     case CODEC_ID_PCM_S16LE_PLANAR:
 399         n /= avctx->channels;
 400         for(c=0;c<avctx->channels;c++)
 401             src2[c] = &src[c*n*2];
 402         for(;n>0;n--)
 403             for(c=0;c<avctx->channels;c++)
 404                 *samples++ = bytestream_get_le16(&src2[c]);
 405         src = src2[avctx->channels-1];
 406         break;
 407     case CODEC_ID_PCM_U16LE:
 408         DECODE(uint16_t, le16, src, samples, n, 0, 0x8000)
 409         break;
 410     case CODEC_ID_PCM_U16BE:
 411         DECODE(uint16_t, be16, src, samples, n, 0, 0x8000)
 412         break;
 413     case CODEC_ID_PCM_S8:
 414         dstu8= (uint8_t*)samples;
 415         for(;n>0;n--) {
 416             *dstu8++ = *src++ + 128;
 417         }
 418         samples= (short*)dstu8;
 419         break;
 420 #if WORDS_BIGENDIAN
 421     case CODEC_ID_PCM_F64LE:
 422         DECODE(int64_t, le64, src, samples, n, 0, 0)
 423         break;
 424     case CODEC_ID_PCM_S32LE:
 425     case CODEC_ID_PCM_F32LE:
 426         DECODE(int32_t, le32, src, samples, n, 0, 0)
 427         break;
 428     case CODEC_ID_PCM_S16LE:
 429         DECODE(int16_t, le16, src, samples, n, 0, 0)
 430         break;
 431     case CODEC_ID_PCM_F64BE:
 432     case CODEC_ID_PCM_F32BE:
 433     case CODEC_ID_PCM_S32BE:
 434     case CODEC_ID_PCM_S16BE:
 435 #else
 436     case CODEC_ID_PCM_F64BE:
 437         DECODE(int64_t, be64, src, samples, n, 0, 0)
 438         break;
 439     case CODEC_ID_PCM_F32BE:
 440     case CODEC_ID_PCM_S32BE:
 441         DECODE(int32_t, be32, src, samples, n, 0, 0)
 442         break;
 443     case CODEC_ID_PCM_S16BE:
 444         DECODE(int16_t, be16, src, samples, n, 0, 0)
 445         break;
 446     case CODEC_ID_PCM_F64LE:
 447     case CODEC_ID_PCM_F32LE:
 448     case CODEC_ID_PCM_S32LE:
 449     case CODEC_ID_PCM_S16LE:
 450 #endif /* WORDS_BIGENDIAN */
 451     case CODEC_ID_PCM_U8:
 452         memcpy(samples, src, n*sample_size);
 453         src += n*sample_size;
 454         samples = (short*)((uint8_t*)data + n*sample_size);
 455         break;
 456     case CODEC_ID_PCM_ZORK:
 457         for(;n>0;n--) {
 458             int x= *src++;
 459             if(x&128) x-= 128;
 460             else      x = -x;
 461             *samples++ = x << 8;
 462         }
 463         break;
 464     case CODEC_ID_PCM_ALAW:
 465     case CODEC_ID_PCM_MULAW:
 466         for(;n>0;n--) {
 467             *samples++ = s->table[*src++];
 468         }
 469         break;
 470     case CODEC_ID_PCM_DVD:
 471         dst_int32_t = data;
 472         n /= avctx->channels;
 473         switch (avctx->bits_per_coded_sample) {
 474         case 20:
 475             while (n--) {
 476                 c = avctx->channels;
 477                 src8 = src + 4*c;
 478                 while (c--) {
 479                     *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8   &0xf0) << 8);
 480                     *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++ &0x0f) << 12);
 481                 }
 482                 src = src8;
 483             }
 484             break;
 485         case 24:
 486             while (n--) {
 487                 c = avctx->channels;
 488                 src8 = src + 4*c;
 489                 while (c--) {
 490                     *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);
 491                     *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);
 492                 }
 493                 src = src8;
 494             }
 495             break;
 496         default:
 497             av_log(avctx, AV_LOG_ERROR, "PCM DVD unsupported sample depth\n");
 498             return -1;
 499             break;
 500         }
 501         samples = (short *) dst_int32_t;
 502         break;
 503     default:
 504         return -1;
 505     }
 506     *data_size = (uint8_t *)samples - (uint8_t *)data;
 507     return src - buf;
 508 }
 509
 510 #ifdef CONFIG_ENCODERS
 511 #define PCM_ENCODER(id,sample_fmt_,name,long_name_) \
 512 AVCodec name ## _encoder = {                    \
 513     #name,                                      \
 514     CODEC_TYPE_AUDIO,                           \
 515     id,                                         \
 516     0,                                          \
 517     pcm_encode_init,                            \
 518     pcm_encode_frame,                           \
 519     pcm_encode_close,                           \
 520     NULL,                                       \
 521     .sample_fmts = (enum SampleFormat[]){sample_fmt_,SAMPLE_FMT_NONE}, \
 522     .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
 523 };
 524 #else
 525 #define PCM_ENCODER(id,sample_fmt_,name,long_name_)
 526 #endif
 527
 528 #ifdef CONFIG_DECODERS
 529 #define PCM_DECODER(id,sample_fmt_,name,long_name_)         \
 530 AVCodec name ## _decoder = {                    \
 531     #name,                                      \
 532     CODEC_TYPE_AUDIO,                           \
 533     id,                                         \
 534     sizeof(PCMDecode),                          \
 535     pcm_decode_init,                            \
 536     NULL,                                       \
 537     NULL,                                       \
 538     pcm_decode_frame,                           \
 539     .sample_fmts = (enum SampleFormat[]){sample_fmt_,SAMPLE_FMT_NONE}, \
 540     .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
 541 };
 542 #else
 543 #define PCM_DECODER(id,sample_fmt_,name,long_name_)
 544 #endif
 545
 546 #define PCM_CODEC(id, sample_fmt_, name, long_name_)         \
 547     PCM_ENCODER(id,sample_fmt_,name,long_name_) PCM_DECODER(id,sample_fmt_,name,long_name_)
 548
 549 /* Note: Do not forget to add new entries to the Makefile as well. */
 550 PCM_CODEC  (CODEC_ID_PCM_ALAW,  SAMPLE_FMT_S16, pcm_alaw, "A-law PCM");
 551 PCM_CODEC  (CODEC_ID_PCM_DVD,   SAMPLE_FMT_S32, pcm_dvd, "signed 20|24-bit big-endian PCM");
 552 PCM_CODEC  (CODEC_ID_PCM_F32BE, SAMPLE_FMT_FLT, pcm_f32be, "32-bit floating point big-endian PCM");
 553 PCM_CODEC  (CODEC_ID_PCM_F32LE, SAMPLE_FMT_FLT, pcm_f32le, "32-bit floating point little-endian PCM");
 554 PCM_CODEC  (CODEC_ID_PCM_F64BE, SAMPLE_FMT_DBL, pcm_f64be, "64-bit floating point big-endian PCM");
 555 PCM_CODEC  (CODEC_ID_PCM_F64LE, SAMPLE_FMT_DBL, pcm_f64le, "64-bit floating point little-endian PCM");
 556 PCM_CODEC  (CODEC_ID_PCM_MULAW, SAMPLE_FMT_S16, pcm_mulaw, "mu-law PCM");
 557 PCM_CODEC  (CODEC_ID_PCM_S8,    SAMPLE_FMT_U8,  pcm_s8, "signed 8-bit PCM");
 558 PCM_CODEC  (CODEC_ID_PCM_S16BE, SAMPLE_FMT_S16, pcm_s16be, "signed 16-bit big-endian PCM");
 559 PCM_CODEC  (CODEC_ID_PCM_S16LE, SAMPLE_FMT_S16, pcm_s16le, "signed 16-bit little-endian PCM");
 560 PCM_DECODER(CODEC_ID_PCM_S16LE_PLANAR, SAMPLE_FMT_S16, pcm_s16le_planar, "16-bit little-endian planar PCM");
 561 PCM_CODEC  (CODEC_ID_PCM_S24BE, SAMPLE_FMT_S32, pcm_s24be, "signed 24-bit big-endian PCM");
 562 PCM_CODEC  (CODEC_ID_PCM_S24DAUD, SAMPLE_FMT_S16,  pcm_s24daud, "D-Cinema audio signed 24-bit PCM");
 563 PCM_CODEC  (CODEC_ID_PCM_S24LE, SAMPLE_FMT_S32, pcm_s24le, "signed 24-bit little-endian PCM");
 564 PCM_CODEC  (CODEC_ID_PCM_S32BE, SAMPLE_FMT_S32, pcm_s32be, "signed 32-bit big-endian PCM");
 565 PCM_CODEC  (CODEC_ID_PCM_S32LE, SAMPLE_FMT_S32, pcm_s32le, "signed 32-bit little-endian PCM");
 566 PCM_CODEC  (CODEC_ID_PCM_U8,    SAMPLE_FMT_U8,  pcm_u8, "unsigned 8-bit PCM");
 567 PCM_CODEC  (CODEC_ID_PCM_U16BE, SAMPLE_FMT_S16, pcm_u16be, "unsigned 16-bit big-endian PCM");
 568 PCM_CODEC  (CODEC_ID_PCM_U16LE, SAMPLE_FMT_S16, pcm_u16le, "unsigned 16-bit little-endian PCM");
 569 PCM_CODEC  (CODEC_ID_PCM_U24BE, SAMPLE_FMT_S32, pcm_u24be, "unsigned 24-bit big-endian PCM");
 570 PCM_CODEC  (CODEC_ID_PCM_U24LE, SAMPLE_FMT_S32, pcm_u24le, "unsigned 24-bit little-endian PCM");
 571 PCM_CODEC  (CODEC_ID_PCM_U32BE, SAMPLE_FMT_S32, pcm_u32be, "unsigned 32-bit big-endian PCM");
 572 PCM_CODEC  (CODEC_ID_PCM_U32LE, SAMPLE_FMT_S32, pcm_u32le, "unsigned 32-bit little-endian PCM");
 573 PCM_CODEC  (CODEC_ID_PCM_ZORK,  SAMPLE_FMT_S16, pcm_zork, "Zork PCM");