FFmpeg: libavcodec/pcm.c Source File

00001 /*
00002  * PCM codecs
00003  * Copyright (c) 2001 Fabrice Bellard
00004  *
00005  * This file is part of FFmpeg.
00006  *
00007  * FFmpeg is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or (at your option) any later version.
00011  *
00012  * FFmpeg is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with FFmpeg; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00020  */
00021 
00027 #include "avcodec.h"
00028 #include "bitstream.h" // for ff_reverse
00029 #include "bytestream.h"
00030 
00031 #define MAX_CHANNELS 64
00032 
00033 /* from g711.c by SUN microsystems (unrestricted use) */
00034 
00035 #define         SIGN_BIT        (0x80)      /* Sign bit for a A-law byte. */
00036 #define         QUANT_MASK      (0xf)       /* Quantization field mask. */
00037 #define         NSEGS           (8)         /* Number of A-law segments. */
00038 #define         SEG_SHIFT       (4)         /* Left shift for segment number. */
00039 #define         SEG_MASK        (0x70)      /* Segment field mask. */
00040 
00041 #define         BIAS            (0x84)      /* Bias for linear code. */
00042 
00043 /*
00044  * alaw2linear() - Convert an A-law value to 16-bit linear PCM
00045  *
00046  */
00047 static av_cold int alaw2linear(unsigned char a_val)
00048 {
00049         int t;
00050         int seg;
00051 
00052         a_val ^= 0x55;
00053 
00054         t = a_val & QUANT_MASK;
00055         seg = ((unsigned)a_val & SEG_MASK) >> SEG_SHIFT;
00056         if(seg) t= (t + t + 1 + 32) << (seg + 2);
00057         else    t= (t + t + 1     ) << 3;
00058 
00059         return (a_val & SIGN_BIT) ? t : -t;
00060 }
00061 
00062 static av_cold int ulaw2linear(unsigned char u_val)
00063 {
00064         int t;
00065 
00066         /* Complement to obtain normal u-law value. */
00067         u_val = ~u_val;
00068 
00069         /*
00070          * Extract and bias the quantization bits. Then
00071          * shift up by the segment number and subtract out the bias.
00072          */
00073         t = ((u_val & QUANT_MASK) << 3) + BIAS;
00074         t <<= ((unsigned)u_val & SEG_MASK) >> SEG_SHIFT;
00075 
00076         return (u_val & SIGN_BIT) ? (BIAS - t) : (t - BIAS);
00077 }
00078 
00079 /* 16384 entries per table */
00080 static uint8_t linear_to_alaw[16384];
00081 static uint8_t linear_to_ulaw[16384];
00082 
00083 static av_cold void build_xlaw_table(uint8_t *linear_to_xlaw,
00084                              int (*xlaw2linear)(unsigned char),
00085                              int mask)
00086 {
00087     int i, j, v, v1, v2;
00088 
00089     j = 0;
00090     for(i=0;i<128;i++) {
00091         if (i != 127) {
00092             v1 = xlaw2linear(i ^ mask);
00093             v2 = xlaw2linear((i + 1) ^ mask);
00094             v = (v1 + v2 + 4) >> 3;
00095         } else {
00096             v = 8192;
00097         }
00098         for(;j<v;j++) {
00099             linear_to_xlaw[8192 + j] = (i ^ mask);
00100             if (j > 0)
00101                 linear_to_xlaw[8192 - j] = (i ^ (mask ^ 0x80));
00102         }
00103     }
00104     linear_to_xlaw[0] = linear_to_xlaw[1];
00105 }
00106 
00107 static av_cold int pcm_encode_init(AVCodecContext *avctx)
00108 {
00109     avctx->frame_size = 1;
00110     switch(avctx->codec->id) {
00111     case CODEC_ID_PCM_ALAW:
00112         build_xlaw_table(linear_to_alaw, alaw2linear, 0xd5);
00113         break;
00114     case CODEC_ID_PCM_MULAW:
00115         build_xlaw_table(linear_to_ulaw, ulaw2linear, 0xff);
00116         break;
00117     default:
00118         break;
00119     }
00120 
00121     avctx->bits_per_coded_sample = av_get_bits_per_sample(avctx->codec->id);
00122     avctx->block_align = avctx->channels * avctx->bits_per_coded_sample/8;
00123     avctx->coded_frame= avcodec_alloc_frame();
00124     avctx->coded_frame->key_frame= 1;
00125 
00126     return 0;
00127 }
00128 
00129 static av_cold int pcm_encode_close(AVCodecContext *avctx)
00130 {
00131     av_freep(&avctx->coded_frame);
00132 
00133     return 0;
00134 }
00135 
00146 #define ENCODE(type, endian, src, dst, n, shift, offset) \
00147     samples_##type = (type*)src; \
00148     for(;n>0;n--) { \
00149         register type v = (*samples_##type++ >> shift) + offset; \
00150         bytestream_put_##endian(&dst, v); \
00151     }
00152 
00153 static int pcm_encode_frame(AVCodecContext *avctx,
00154                             unsigned char *frame, int buf_size, void *data)
00155 {
00156     int n, sample_size, v;
00157     short *samples;
00158     unsigned char *dst;
00159     uint8_t *srcu8;
00160     int16_t *samples_int16_t;
00161     int32_t *samples_int32_t;
00162     int64_t *samples_int64_t;
00163     uint16_t *samples_uint16_t;
00164     uint32_t *samples_uint32_t;
00165 
00166     sample_size = av_get_bits_per_sample(avctx->codec->id)/8;
00167     n = buf_size / sample_size;
00168     samples = data;
00169     dst = frame;
00170 
00171     if (avctx->sample_fmt!=avctx->codec->sample_fmts[0]) {
00172         av_log(avctx, AV_LOG_ERROR, "invalid sample_fmt\n");
00173         return -1;
00174     }
00175 
00176     switch(avctx->codec->id) {
00177     case CODEC_ID_PCM_U32LE:
00178         ENCODE(uint32_t, le32, samples, dst, n, 0, 0x80000000)
00179         break;
00180     case CODEC_ID_PCM_U32BE:
00181         ENCODE(uint32_t, be32, samples, dst, n, 0, 0x80000000)
00182         break;
00183     case CODEC_ID_PCM_S24LE:
00184         ENCODE(int32_t, le24, samples, dst, n, 8, 0)
00185         break;
00186     case CODEC_ID_PCM_S24BE:
00187         ENCODE(int32_t, be24, samples, dst, n, 8, 0)
00188         break;
00189     case CODEC_ID_PCM_U24LE:
00190         ENCODE(uint32_t, le24, samples, dst, n, 8, 0x800000)
00191         break;
00192     case CODEC_ID_PCM_U24BE:
00193         ENCODE(uint32_t, be24, samples, dst, n, 8, 0x800000)
00194         break;
00195     case CODEC_ID_PCM_S24DAUD:
00196         for(;n>0;n--) {
00197             uint32_t tmp = ff_reverse[(*samples >> 8) & 0xff] +
00198                            (ff_reverse[*samples & 0xff] << 8);
00199             tmp <<= 4; // sync flags would go here
00200             bytestream_put_be24(&dst, tmp);
00201             samples++;
00202         }
00203         break;
00204     case CODEC_ID_PCM_U16LE:
00205         ENCODE(uint16_t, le16, samples, dst, n, 0, 0x8000)
00206         break;
00207     case CODEC_ID_PCM_U16BE:
00208         ENCODE(uint16_t, be16, samples, dst, n, 0, 0x8000)
00209         break;
00210     case CODEC_ID_PCM_S8:
00211         srcu8= data;
00212         for(;n>0;n--) {
00213             v = *srcu8++;
00214             *dst++ = v - 128;
00215         }
00216         break;
00217 #ifdef WORDS_BIGENDIAN
00218     case CODEC_ID_PCM_F64LE:
00219         ENCODE(int64_t, le64, samples, dst, n, 0, 0)
00220         break;
00221     case CODEC_ID_PCM_S32LE:
00222     case CODEC_ID_PCM_F32LE:
00223         ENCODE(int32_t, le32, samples, dst, n, 0, 0)
00224         break;
00225     case CODEC_ID_PCM_S16LE:
00226         ENCODE(int16_t, le16, samples, dst, n, 0, 0)
00227         break;
00228     case CODEC_ID_PCM_F64BE:
00229     case CODEC_ID_PCM_F32BE:
00230     case CODEC_ID_PCM_S32BE:
00231     case CODEC_ID_PCM_S16BE:
00232 #else
00233     case CODEC_ID_PCM_F64BE:
00234         ENCODE(int64_t, be64, samples, dst, n, 0, 0)
00235         break;
00236     case CODEC_ID_PCM_F32BE:
00237     case CODEC_ID_PCM_S32BE:
00238         ENCODE(int32_t, be32, samples, dst, n, 0, 0)
00239         break;
00240     case CODEC_ID_PCM_S16BE:
00241         ENCODE(int16_t, be16, samples, dst, n, 0, 0)
00242         break;
00243     case CODEC_ID_PCM_F64LE:
00244     case CODEC_ID_PCM_F32LE:
00245     case CODEC_ID_PCM_S32LE:
00246     case CODEC_ID_PCM_S16LE:
00247 #endif /* WORDS_BIGENDIAN */
00248     case CODEC_ID_PCM_U8:
00249         memcpy(dst, samples, n*sample_size);
00250         dst += n*sample_size;
00251         break;
00252     case CODEC_ID_PCM_ZORK:
00253         for(;n>0;n--) {
00254             v= *samples++ >> 8;
00255             if(v<0)   v = -v;
00256             else      v+= 128;
00257             *dst++ = v;
00258         }
00259         break;
00260     case CODEC_ID_PCM_ALAW:
00261         for(;n>0;n--) {
00262             v = *samples++;
00263             *dst++ = linear_to_alaw[(v + 32768) >> 2];
00264         }
00265         break;
00266     case CODEC_ID_PCM_MULAW:
00267         for(;n>0;n--) {
00268             v = *samples++;
00269             *dst++ = linear_to_ulaw[(v + 32768) >> 2];
00270         }
00271         break;
00272     default:
00273         return -1;
00274     }
00275     //avctx->frame_size = (dst - frame) / (sample_size * avctx->channels);
00276 
00277     return dst - frame;
00278 }
00279 
00280 typedef struct PCMDecode {
00281     short table[256];
00282 } PCMDecode;
00283 
00284 static av_cold int pcm_decode_init(AVCodecContext * avctx)
00285 {
00286     PCMDecode *s = avctx->priv_data;
00287     int i;
00288 
00289     switch(avctx->codec->id) {
00290     case CODEC_ID_PCM_ALAW:
00291         for(i=0;i<256;i++)
00292             s->table[i] = alaw2linear(i);
00293         break;
00294     case CODEC_ID_PCM_MULAW:
00295         for(i=0;i<256;i++)
00296             s->table[i] = ulaw2linear(i);
00297         break;
00298     default:
00299         break;
00300     }
00301 
00302     avctx->sample_fmt = avctx->codec->sample_fmts[0];
00303     return 0;
00304 }
00305 
00316 #define DECODE(type, endian, src, dst, n, shift, offset) \
00317     dst_##type = (type*)dst; \
00318     for(;n>0;n--) { \
00319         register type v = bytestream_get_##endian(&src); \
00320         *dst_##type++ = (v - offset) << shift; \
00321     } \
00322     dst = (short*)dst_##type;
00323 
00324 static int pcm_decode_frame(AVCodecContext *avctx,
00325                             void *data, int *data_size,
00326                             const uint8_t *buf, int buf_size)
00327 {
00328     PCMDecode *s = avctx->priv_data;
00329     int sample_size, c, n;
00330     short *samples;
00331     const uint8_t *src, *src8, *src2[MAX_CHANNELS];
00332     uint8_t *dstu8;
00333     int16_t *dst_int16_t;
00334     int32_t *dst_int32_t;
00335     int64_t *dst_int64_t;
00336     uint16_t *dst_uint16_t;
00337     uint32_t *dst_uint32_t;
00338 
00339     samples = data;
00340     src = buf;
00341 
00342     if (avctx->sample_fmt!=avctx->codec->sample_fmts[0]) {
00343         av_log(avctx, AV_LOG_ERROR, "invalid sample_fmt\n");
00344         return -1;
00345     }
00346 
00347     if(avctx->channels <= 0 || avctx->channels > MAX_CHANNELS){
00348         av_log(avctx, AV_LOG_ERROR, "PCM channels out of bounds\n");
00349         return -1;
00350     }
00351 
00352     sample_size = av_get_bits_per_sample(avctx->codec_id)/8;
00353 
00354     /* av_get_bits_per_sample returns 0 for CODEC_ID_PCM_DVD */
00355     if (CODEC_ID_PCM_DVD == avctx->codec_id)
00356         /* 2 samples are interleaved per block in PCM_DVD */
00357         sample_size = avctx->bits_per_coded_sample * 2 / 8;
00358 
00359     n = avctx->channels * sample_size;
00360 
00361     if(n && buf_size % n){
00362         av_log(avctx, AV_LOG_ERROR, "invalid PCM packet\n");
00363         return -1;
00364     }
00365 
00366     buf_size= FFMIN(buf_size, *data_size/2);
00367     *data_size=0;
00368 
00369     n = buf_size/sample_size;
00370 
00371     switch(avctx->codec->id) {
00372     case CODEC_ID_PCM_U32LE:
00373         DECODE(uint32_t, le32, src, samples, n, 0, 0x80000000)
00374         break;
00375     case CODEC_ID_PCM_U32BE:
00376         DECODE(uint32_t, be32, src, samples, n, 0, 0x80000000)
00377         break;
00378     case CODEC_ID_PCM_S24LE:
00379         DECODE(int32_t, le24, src, samples, n, 8, 0)
00380         break;
00381     case CODEC_ID_PCM_S24BE:
00382         DECODE(int32_t, be24, src, samples, n, 8, 0)
00383         break;
00384     case CODEC_ID_PCM_U24LE:
00385         DECODE(uint32_t, le24, src, samples, n, 8, 0x800000)
00386         break;
00387     case CODEC_ID_PCM_U24BE:
00388         DECODE(uint32_t, be24, src, samples, n, 8, 0x800000)
00389         break;
00390     case CODEC_ID_PCM_S24DAUD:
00391         for(;n>0;n--) {
00392           uint32_t v = bytestream_get_be24(&src);
00393           v >>= 4; // sync flags are here
00394           *samples++ = ff_reverse[(v >> 8) & 0xff] +
00395                        (ff_reverse[v & 0xff] << 8);
00396         }
00397         break;
00398     case CODEC_ID_PCM_S16LE_PLANAR:
00399         n /= avctx->channels;
00400         for(c=0;c<avctx->channels;c++)
00401             src2[c] = &src[c*n*2];
00402         for(;n>0;n--)
00403             for(c=0;c<avctx->channels;c++)
00404                 *samples++ = bytestream_get_le16(&src2[c]);
00405         src = src2[avctx->channels-1];
00406         break;
00407     case CODEC_ID_PCM_U16LE:
00408         DECODE(uint16_t, le16, src, samples, n, 0, 0x8000)
00409         break;
00410     case CODEC_ID_PCM_U16BE:
00411         DECODE(uint16_t, be16, src, samples, n, 0, 0x8000)
00412         break;
00413     case CODEC_ID_PCM_S8:
00414         dstu8= (uint8_t*)samples;
00415         for(;n>0;n--) {
00416             *dstu8++ = *src++ + 128;
00417         }
00418         samples= (short*)dstu8;
00419         break;
00420 #ifdef WORDS_BIGENDIAN
00421     case CODEC_ID_PCM_F64LE:
00422         DECODE(int64_t, le64, src, samples, n, 0, 0)
00423         break;
00424     case CODEC_ID_PCM_S32LE:
00425     case CODEC_ID_PCM_F32LE:
00426         DECODE(int32_t, le32, src, samples, n, 0, 0)
00427         break;
00428     case CODEC_ID_PCM_S16LE:
00429         DECODE(int16_t, le16, src, samples, n, 0, 0)
00430         break;
00431     case CODEC_ID_PCM_F64BE:
00432     case CODEC_ID_PCM_F32BE:
00433     case CODEC_ID_PCM_S32BE:
00434     case CODEC_ID_PCM_S16BE:
00435 #else
00436     case CODEC_ID_PCM_F64BE:
00437         DECODE(int64_t, be64, src, samples, n, 0, 0)
00438         break;
00439     case CODEC_ID_PCM_F32BE:
00440     case CODEC_ID_PCM_S32BE:
00441         DECODE(int32_t, be32, src, samples, n, 0, 0)
00442         break;
00443     case CODEC_ID_PCM_S16BE:
00444         DECODE(int16_t, be16, src, samples, n, 0, 0)
00445         break;
00446     case CODEC_ID_PCM_F64LE:
00447     case CODEC_ID_PCM_F32LE:
00448     case CODEC_ID_PCM_S32LE:
00449     case CODEC_ID_PCM_S16LE:
00450 #endif /* WORDS_BIGENDIAN */
00451     case CODEC_ID_PCM_U8:
00452         memcpy(samples, src, n*sample_size);
00453         src += n*sample_size;
00454         samples = (short*)((uint8_t*)data + n*sample_size);
00455         break;
00456     case CODEC_ID_PCM_ZORK:
00457         for(;n>0;n--) {
00458             int x= *src++;
00459             if(x&128) x-= 128;
00460             else      x = -x;
00461             *samples++ = x << 8;
00462         }
00463         break;
00464     case CODEC_ID_PCM_ALAW:
00465     case CODEC_ID_PCM_MULAW:
00466         for(;n>0;n--) {
00467             *samples++ = s->table[*src++];
00468         }
00469         break;
00470     case CODEC_ID_PCM_DVD:
00471         dst_int32_t = data;
00472         n /= avctx->channels;
00473         switch (avctx->bits_per_coded_sample) {
00474         case 20:
00475             while (n--) {
00476                 c = avctx->channels;
00477                 src8 = src + 4*c;
00478                 while (c--) {
00479                     *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8   &0xf0) << 8);
00480                     *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++ &0x0f) << 12);
00481                 }
00482                 src = src8;
00483             }
00484             break;
00485         case 24:
00486             while (n--) {
00487                 c = avctx->channels;
00488                 src8 = src + 4*c;
00489                 while (c--) {
00490                     *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);
00491                     *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);
00492                 }
00493                 src = src8;
00494             }
00495             break;
00496         default:
00497             av_log(avctx, AV_LOG_ERROR, "PCM DVD unsupported sample depth\n");
00498             return -1;
00499             break;
00500         }
00501         samples = (short *) dst_int32_t;
00502         break;
00503     default:
00504         return -1;
00505     }
00506     *data_size = (uint8_t *)samples - (uint8_t *)data;
00507     return src - buf;
00508 }
00509 
00510 #if CONFIG_ENCODERS
00511 #define PCM_ENCODER(id,sample_fmt_,name,long_name_) \
00512 AVCodec name ## _encoder = {                    \
00513     #name,                                      \
00514     CODEC_TYPE_AUDIO,                           \
00515     id,                                         \
00516     0,                                          \
00517     pcm_encode_init,                            \
00518     pcm_encode_frame,                           \
00519     pcm_encode_close,                           \
00520     NULL,                                       \
00521     .sample_fmts = (enum SampleFormat[]){sample_fmt_,SAMPLE_FMT_NONE}, \
00522     .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
00523 };
00524 #else
00525 #define PCM_ENCODER(id,sample_fmt_,name,long_name_)
00526 #endif
00527 
00528 #if CONFIG_DECODERS
00529 #define PCM_DECODER(id,sample_fmt_,name,long_name_)         \
00530 AVCodec name ## _decoder = {                    \
00531     #name,                                      \
00532     CODEC_TYPE_AUDIO,                           \
00533     id,                                         \
00534     sizeof(PCMDecode),                          \
00535     pcm_decode_init,                            \
00536     NULL,                                       \
00537     NULL,                                       \
00538     pcm_decode_frame,                           \
00539     .sample_fmts = (enum SampleFormat[]){sample_fmt_,SAMPLE_FMT_NONE}, \
00540     .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
00541 };
00542 #else
00543 #define PCM_DECODER(id,sample_fmt_,name,long_name_)
00544 #endif
00545 
00546 #define PCM_CODEC(id, sample_fmt_, name, long_name_)         \
00547     PCM_ENCODER(id,sample_fmt_,name,long_name_) PCM_DECODER(id,sample_fmt_,name,long_name_)
00548 
00549 /* Note: Do not forget to add new entries to the Makefile as well. */
00550 PCM_CODEC  (CODEC_ID_PCM_ALAW,  SAMPLE_FMT_S16, pcm_alaw, "PCM A-law");
00551 PCM_CODEC  (CODEC_ID_PCM_DVD,   SAMPLE_FMT_S32, pcm_dvd, "PCM signed 20|24-bit big-endian");
00552 PCM_CODEC  (CODEC_ID_PCM_F32BE, SAMPLE_FMT_FLT, pcm_f32be, "PCM 32-bit floating point big-endian");
00553 PCM_CODEC  (CODEC_ID_PCM_F32LE, SAMPLE_FMT_FLT, pcm_f32le, "PCM 32-bit floating point little-endian");
00554 PCM_CODEC  (CODEC_ID_PCM_F64BE, SAMPLE_FMT_DBL, pcm_f64be, "PCM 64-bit floating point big-endian");
00555 PCM_CODEC  (CODEC_ID_PCM_F64LE, SAMPLE_FMT_DBL, pcm_f64le, "PCM 64-bit floating point little-endian");
00556 PCM_CODEC  (CODEC_ID_PCM_MULAW, SAMPLE_FMT_S16, pcm_mulaw, "PCM mu-law");
00557 PCM_CODEC  (CODEC_ID_PCM_S8,    SAMPLE_FMT_U8,  pcm_s8, "PCM signed 8-bit");
00558 PCM_CODEC  (CODEC_ID_PCM_S16BE, SAMPLE_FMT_S16, pcm_s16be, "PCM signed 16-bit big-endian");
00559 PCM_CODEC  (CODEC_ID_PCM_S16LE, SAMPLE_FMT_S16, pcm_s16le, "PCM signed 16-bit little-endian");
00560 PCM_DECODER(CODEC_ID_PCM_S16LE_PLANAR, SAMPLE_FMT_S16, pcm_s16le_planar, "PCM 16-bit little-endian planar");
00561 PCM_CODEC  (CODEC_ID_PCM_S24BE, SAMPLE_FMT_S32, pcm_s24be, "PCM signed 24-bit big-endian");
00562 PCM_CODEC  (CODEC_ID_PCM_S24DAUD, SAMPLE_FMT_S16,  pcm_s24daud, "PCM D-Cinema audio signed 24-bit");
00563 PCM_CODEC  (CODEC_ID_PCM_S24LE, SAMPLE_FMT_S32, pcm_s24le, "PCM signed 24-bit little-endian");
00564 PCM_CODEC  (CODEC_ID_PCM_S32BE, SAMPLE_FMT_S32, pcm_s32be, "PCM signed 32-bit big-endian");
00565 PCM_CODEC  (CODEC_ID_PCM_S32LE, SAMPLE_FMT_S32, pcm_s32le, "PCM signed 32-bit little-endian");
00566 PCM_CODEC  (CODEC_ID_PCM_U8,    SAMPLE_FMT_U8,  pcm_u8, "PCM unsigned 8-bit");
00567 PCM_CODEC  (CODEC_ID_PCM_U16BE, SAMPLE_FMT_S16, pcm_u16be, "PCM unsigned 16-bit big-endian");
00568 PCM_CODEC  (CODEC_ID_PCM_U16LE, SAMPLE_FMT_S16, pcm_u16le, "PCM unsigned 16-bit little-endian");
00569 PCM_CODEC  (CODEC_ID_PCM_U24BE, SAMPLE_FMT_S32, pcm_u24be, "PCM unsigned 24-bit big-endian");
00570 PCM_CODEC  (CODEC_ID_PCM_U24LE, SAMPLE_FMT_S32, pcm_u24le, "PCM unsigned 24-bit little-endian");
00571 PCM_CODEC  (CODEC_ID_PCM_U32BE, SAMPLE_FMT_S32, pcm_u32be, "PCM unsigned 32-bit big-endian");
00572 PCM_CODEC  (CODEC_ID_PCM_U32LE, SAMPLE_FMT_S32, pcm_u32le, "PCM unsigned 32-bit little-endian");
00573 PCM_CODEC  (CODEC_ID_PCM_ZORK,  SAMPLE_FMT_S16, pcm_zork, "PCM Zork");