3 * Copyright (c) 2001 Fabrice Bellard
5 * This file is part of FFmpeg.
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.
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.
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
28 #include "libavutil/common.h" /* for av_reverse */
29 #include "bytestream.h"
31 #include "pcm_tablegen.h"
33 #define MAX_CHANNELS 64
35 static av_cold int pcm_encode_init(AVCodecContext *avctx)
37 avctx->frame_size = 0;
38 switch(avctx->codec->id) {
39 case CODEC_ID_PCM_ALAW:
42 case CODEC_ID_PCM_MULAW:
49 avctx->bits_per_coded_sample = av_get_bits_per_sample(avctx->codec->id);
50 avctx->block_align = avctx->channels * avctx->bits_per_coded_sample/8;
51 avctx->coded_frame= avcodec_alloc_frame();
52 if (!avctx->coded_frame)
53 return AVERROR(ENOMEM);
58 static av_cold int pcm_encode_close(AVCodecContext *avctx)
60 av_freep(&avctx->coded_frame);
66 * Write PCM samples macro
67 * @param type Datatype of native machine format
68 * @param endian bytestream_put_xxx() suffix
69 * @param src Source pointer (variable name)
70 * @param dst Destination pointer (variable name)
71 * @param n Total number of samples (variable name)
72 * @param shift Bitshift (bits)
73 * @param offset Sample value offset
75 #define ENCODE(type, endian, src, dst, n, shift, offset) \
76 samples_##type = (const type*) src; \
78 register type v = (*samples_##type++ >> shift) + offset; \
79 bytestream_put_##endian(&dst, v); \
82 static int pcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
83 const AVFrame *frame, int *got_packet_ptr)
85 int n, sample_size, v, ret;
89 const int16_t *samples_int16_t;
90 const int32_t *samples_int32_t;
91 const int64_t *samples_int64_t;
92 const uint16_t *samples_uint16_t;
93 const uint32_t *samples_uint32_t;
95 sample_size = av_get_bits_per_sample(avctx->codec->id)/8;
96 n = frame->nb_samples * avctx->channels;
97 samples = (const short *)frame->data[0];
99 if ((ret = ff_alloc_packet(avpkt, n * sample_size))) {
100 av_log(avctx, AV_LOG_ERROR, "Error getting output packet\n");
105 switch(avctx->codec->id) {
106 case CODEC_ID_PCM_U32LE:
107 ENCODE(uint32_t, le32, samples, dst, n, 0, 0x80000000)
109 case CODEC_ID_PCM_U32BE:
110 ENCODE(uint32_t, be32, samples, dst, n, 0, 0x80000000)
112 case CODEC_ID_PCM_S24LE:
113 ENCODE(int32_t, le24, samples, dst, n, 8, 0)
115 case CODEC_ID_PCM_S24BE:
116 ENCODE(int32_t, be24, samples, dst, n, 8, 0)
118 case CODEC_ID_PCM_U24LE:
119 ENCODE(uint32_t, le24, samples, dst, n, 8, 0x800000)
121 case CODEC_ID_PCM_U24BE:
122 ENCODE(uint32_t, be24, samples, dst, n, 8, 0x800000)
124 case CODEC_ID_PCM_S24DAUD:
126 uint32_t tmp = av_reverse[(*samples >> 8) & 0xff] +
127 (av_reverse[*samples & 0xff] << 8);
128 tmp <<= 4; // sync flags would go here
129 bytestream_put_be24(&dst, tmp);
133 case CODEC_ID_PCM_U16LE:
134 ENCODE(uint16_t, le16, samples, dst, n, 0, 0x8000)
136 case CODEC_ID_PCM_U16BE:
137 ENCODE(uint16_t, be16, samples, dst, n, 0, 0x8000)
139 case CODEC_ID_PCM_S8:
140 srcu8 = frame->data[0];
147 case CODEC_ID_PCM_F64LE:
148 ENCODE(int64_t, le64, samples, dst, n, 0, 0)
150 case CODEC_ID_PCM_S32LE:
151 case CODEC_ID_PCM_F32LE:
152 ENCODE(int32_t, le32, samples, dst, n, 0, 0)
154 case CODEC_ID_PCM_S16LE:
155 ENCODE(int16_t, le16, samples, dst, n, 0, 0)
157 case CODEC_ID_PCM_F64BE:
158 case CODEC_ID_PCM_F32BE:
159 case CODEC_ID_PCM_S32BE:
160 case CODEC_ID_PCM_S16BE:
162 case CODEC_ID_PCM_F64BE:
163 ENCODE(int64_t, be64, samples, dst, n, 0, 0)
165 case CODEC_ID_PCM_F32BE:
166 case CODEC_ID_PCM_S32BE:
167 ENCODE(int32_t, be32, samples, dst, n, 0, 0)
169 case CODEC_ID_PCM_S16BE:
170 ENCODE(int16_t, be16, samples, dst, n, 0, 0)
172 case CODEC_ID_PCM_F64LE:
173 case CODEC_ID_PCM_F32LE:
174 case CODEC_ID_PCM_S32LE:
175 case CODEC_ID_PCM_S16LE:
176 #endif /* HAVE_BIGENDIAN */
177 case CODEC_ID_PCM_U8:
178 memcpy(dst, samples, n*sample_size);
179 dst += n*sample_size;
181 case CODEC_ID_PCM_ALAW:
184 *dst++ = linear_to_alaw[(v + 32768) >> 2];
187 case CODEC_ID_PCM_MULAW:
190 *dst++ = linear_to_ulaw[(v + 32768) >> 2];
201 typedef struct PCMDecode {
206 static av_cold int pcm_decode_init(AVCodecContext * avctx)
208 PCMDecode *s = avctx->priv_data;
211 if (avctx->channels <= 0 || avctx->channels > MAX_CHANNELS) {
212 av_log(avctx, AV_LOG_ERROR, "PCM channels out of bounds\n");
213 return AVERROR(EINVAL);
216 switch(avctx->codec->id) {
217 case CODEC_ID_PCM_ALAW:
219 s->table[i] = alaw2linear(i);
221 case CODEC_ID_PCM_MULAW:
223 s->table[i] = ulaw2linear(i);
229 avctx->sample_fmt = avctx->codec->sample_fmts[0];
231 if (avctx->sample_fmt == AV_SAMPLE_FMT_S32)
232 avctx->bits_per_raw_sample = av_get_bits_per_sample(avctx->codec->id);
234 avcodec_get_frame_defaults(&s->frame);
235 avctx->coded_frame = &s->frame;
241 * Read PCM samples macro
242 * @param size Data size of native machine format
243 * @param endian bytestream_get_xxx() endian suffix
244 * @param src Source pointer (variable name)
245 * @param dst Destination pointer (variable name)
246 * @param n Total number of samples (variable name)
247 * @param shift Bitshift (bits)
248 * @param offset Sample value offset
250 #define DECODE(size, endian, src, dst, n, shift, offset) \
252 uint##size##_t v = bytestream_get_##endian(&src); \
253 AV_WN##size##A(dst, (v - offset) << shift); \
257 static int pcm_decode_frame(AVCodecContext *avctx, void *data,
258 int *got_frame_ptr, AVPacket *avpkt)
260 const uint8_t *src = avpkt->data;
261 int buf_size = avpkt->size;
262 PCMDecode *s = avctx->priv_data;
263 int sample_size, c, n, ret, samples_per_block;
265 int32_t *dst_int32_t;
267 sample_size = av_get_bits_per_sample(avctx->codec_id)/8;
269 /* av_get_bits_per_sample returns 0 for CODEC_ID_PCM_DVD */
270 samples_per_block = 1;
271 if (CODEC_ID_PCM_DVD == avctx->codec_id) {
272 if (avctx->bits_per_coded_sample != 20 &&
273 avctx->bits_per_coded_sample != 24) {
274 av_log(avctx, AV_LOG_ERROR,
275 "PCM DVD unsupported sample depth %i\n",
276 avctx->bits_per_coded_sample);
277 return AVERROR(EINVAL);
279 /* 2 samples are interleaved per block in PCM_DVD */
280 samples_per_block = 2;
281 sample_size = avctx->bits_per_coded_sample * 2 / 8;
282 } else if (avctx->codec_id == CODEC_ID_PCM_LXF) {
283 /* we process 40-bit blocks per channel for LXF */
284 samples_per_block = 2;
288 if (sample_size == 0) {
289 av_log(avctx, AV_LOG_ERROR, "Invalid sample_size\n");
290 return AVERROR(EINVAL);
293 n = avctx->channels * sample_size;
295 if(n && buf_size % n){
297 av_log(avctx, AV_LOG_ERROR, "invalid PCM packet\n");
300 buf_size -= buf_size % n;
303 n = buf_size/sample_size;
305 /* get output buffer */
306 s->frame.nb_samples = n * samples_per_block / avctx->channels;
307 if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
308 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
311 samples = s->frame.data[0];
313 switch(avctx->codec->id) {
314 case CODEC_ID_PCM_U32LE:
315 DECODE(32, le32, src, samples, n, 0, 0x80000000)
317 case CODEC_ID_PCM_U32BE:
318 DECODE(32, be32, src, samples, n, 0, 0x80000000)
320 case CODEC_ID_PCM_S24LE:
321 DECODE(32, le24, src, samples, n, 8, 0)
323 case CODEC_ID_PCM_S24BE:
324 DECODE(32, be24, src, samples, n, 8, 0)
326 case CODEC_ID_PCM_U24LE:
327 DECODE(32, le24, src, samples, n, 8, 0x800000)
329 case CODEC_ID_PCM_U24BE:
330 DECODE(32, be24, src, samples, n, 8, 0x800000)
332 case CODEC_ID_PCM_S24DAUD:
334 uint32_t v = bytestream_get_be24(&src);
335 v >>= 4; // sync flags are here
336 AV_WN16A(samples, av_reverse[(v >> 8) & 0xff] +
337 (av_reverse[v & 0xff] << 8));
341 case CODEC_ID_PCM_S16LE_PLANAR:
343 const uint8_t *src2[MAX_CHANNELS];
344 n /= avctx->channels;
345 for(c=0;c<avctx->channels;c++)
346 src2[c] = &src[c*n*2];
348 for(c=0;c<avctx->channels;c++) {
349 AV_WN16A(samples, bytestream_get_le16(&src2[c]));
354 case CODEC_ID_PCM_U16LE:
355 DECODE(16, le16, src, samples, n, 0, 0x8000)
357 case CODEC_ID_PCM_U16BE:
358 DECODE(16, be16, src, samples, n, 0, 0x8000)
360 case CODEC_ID_PCM_S8:
362 *samples++ = *src++ + 128;
366 case CODEC_ID_PCM_F64LE:
367 DECODE(64, le64, src, samples, n, 0, 0)
369 case CODEC_ID_PCM_S32LE:
370 case CODEC_ID_PCM_F32LE:
371 DECODE(32, le32, src, samples, n, 0, 0)
373 case CODEC_ID_PCM_S16LE:
374 DECODE(16, le16, src, samples, n, 0, 0)
376 case CODEC_ID_PCM_F64BE:
377 case CODEC_ID_PCM_F32BE:
378 case CODEC_ID_PCM_S32BE:
379 case CODEC_ID_PCM_S16BE:
381 case CODEC_ID_PCM_F64BE:
382 DECODE(64, be64, src, samples, n, 0, 0)
384 case CODEC_ID_PCM_F32BE:
385 case CODEC_ID_PCM_S32BE:
386 DECODE(32, be32, src, samples, n, 0, 0)
388 case CODEC_ID_PCM_S16BE:
389 DECODE(16, be16, src, samples, n, 0, 0)
391 case CODEC_ID_PCM_F64LE:
392 case CODEC_ID_PCM_F32LE:
393 case CODEC_ID_PCM_S32LE:
394 case CODEC_ID_PCM_S16LE:
395 #endif /* HAVE_BIGENDIAN */
396 case CODEC_ID_PCM_U8:
397 memcpy(samples, src, n*sample_size);
399 case CODEC_ID_PCM_ZORK:
407 case CODEC_ID_PCM_ALAW:
408 case CODEC_ID_PCM_MULAW:
410 AV_WN16A(samples, s->table[*src++]);
414 case CODEC_ID_PCM_DVD:
417 dst_int32_t = (int32_t *)s->frame.data[0];
418 n /= avctx->channels;
419 switch (avctx->bits_per_coded_sample) {
425 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8 &0xf0) << 8);
426 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++ &0x0f) << 12);
436 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);
437 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);
445 case CODEC_ID_PCM_LXF:
449 dst_int32_t = (int32_t *)s->frame.data[0];
450 n /= avctx->channels;
451 //unpack and de-planerize
452 for (i = 0; i < n; i++) {
453 for (c = 0, src8 = src + i*5; c < avctx->channels; c++, src8 += n*5) {
454 //extract low 20 bits and expand to 32 bits
455 *dst_int32_t++ = (src8[2] << 28) | (src8[1] << 20) | (src8[0] << 12) |
456 ((src8[2] & 0xF) << 8) | src8[1];
459 for (c = 0, src8 = src + i*5; c < avctx->channels; c++, src8 += n*5) {
460 //extract high 20 bits and expand to 32 bits
461 *dst_int32_t++ = (src8[4] << 24) | (src8[3] << 16) |
462 ((src8[2] & 0xF0) << 8) | (src8[4] << 4) | (src8[3] >> 4);
472 *(AVFrame *)data = s->frame;
478 #define PCM_ENCODER(id_,sample_fmt_,name_,long_name_) \
479 AVCodec ff_ ## name_ ## _encoder = { \
481 .type = AVMEDIA_TYPE_AUDIO, \
483 .init = pcm_encode_init, \
484 .encode2 = pcm_encode_frame, \
485 .close = pcm_encode_close, \
486 .capabilities = CODEC_CAP_VARIABLE_FRAME_SIZE, \
487 .sample_fmts = (const enum AVSampleFormat[]){sample_fmt_,AV_SAMPLE_FMT_NONE}, \
488 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
491 #define PCM_ENCODER(id,sample_fmt_,name,long_name_)
495 #define PCM_DECODER(id_,sample_fmt_,name_,long_name_) \
496 AVCodec ff_ ## name_ ## _decoder = { \
498 .type = AVMEDIA_TYPE_AUDIO, \
500 .priv_data_size = sizeof(PCMDecode), \
501 .init = pcm_decode_init, \
502 .decode = pcm_decode_frame, \
503 .capabilities = CODEC_CAP_DR1, \
504 .sample_fmts = (const enum AVSampleFormat[]){sample_fmt_,AV_SAMPLE_FMT_NONE}, \
505 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
508 #define PCM_DECODER(id,sample_fmt_,name,long_name_)
511 #define PCM_CODEC(id, sample_fmt_, name, long_name_) \
512 PCM_ENCODER(id,sample_fmt_,name,long_name_); PCM_DECODER(id,sample_fmt_,name,long_name_)
514 /* Note: Do not forget to add new entries to the Makefile as well. */
515 PCM_CODEC (CODEC_ID_PCM_ALAW, AV_SAMPLE_FMT_S16, pcm_alaw, "PCM A-law / G.711 A-law");
516 PCM_DECODER(CODEC_ID_PCM_DVD, AV_SAMPLE_FMT_S32, pcm_dvd, "PCM signed 20|24-bit big-endian");
517 PCM_CODEC (CODEC_ID_PCM_F32BE, AV_SAMPLE_FMT_FLT, pcm_f32be, "PCM 32-bit floating point big-endian");
518 PCM_CODEC (CODEC_ID_PCM_F32LE, AV_SAMPLE_FMT_FLT, pcm_f32le, "PCM 32-bit floating point little-endian");
519 PCM_CODEC (CODEC_ID_PCM_F64BE, AV_SAMPLE_FMT_DBL, pcm_f64be, "PCM 64-bit floating point big-endian");
520 PCM_CODEC (CODEC_ID_PCM_F64LE, AV_SAMPLE_FMT_DBL, pcm_f64le, "PCM 64-bit floating point little-endian");
521 PCM_DECODER(CODEC_ID_PCM_LXF, AV_SAMPLE_FMT_S32, pcm_lxf, "PCM signed 20-bit little-endian planar");
522 PCM_CODEC (CODEC_ID_PCM_MULAW, AV_SAMPLE_FMT_S16, pcm_mulaw, "PCM mu-law / G.711 mu-law");
523 PCM_CODEC (CODEC_ID_PCM_S8, AV_SAMPLE_FMT_U8, pcm_s8, "PCM signed 8-bit");
524 PCM_CODEC (CODEC_ID_PCM_S16BE, AV_SAMPLE_FMT_S16, pcm_s16be, "PCM signed 16-bit big-endian");
525 PCM_CODEC (CODEC_ID_PCM_S16LE, AV_SAMPLE_FMT_S16, pcm_s16le, "PCM signed 16-bit little-endian");
526 PCM_DECODER(CODEC_ID_PCM_S16LE_PLANAR, AV_SAMPLE_FMT_S16, pcm_s16le_planar, "PCM 16-bit little-endian planar");
527 PCM_CODEC (CODEC_ID_PCM_S24BE, AV_SAMPLE_FMT_S32, pcm_s24be, "PCM signed 24-bit big-endian");
528 PCM_CODEC (CODEC_ID_PCM_S24DAUD, AV_SAMPLE_FMT_S16, pcm_s24daud, "PCM D-Cinema audio signed 24-bit");
529 PCM_CODEC (CODEC_ID_PCM_S24LE, AV_SAMPLE_FMT_S32, pcm_s24le, "PCM signed 24-bit little-endian");
530 PCM_CODEC (CODEC_ID_PCM_S32BE, AV_SAMPLE_FMT_S32, pcm_s32be, "PCM signed 32-bit big-endian");
531 PCM_CODEC (CODEC_ID_PCM_S32LE, AV_SAMPLE_FMT_S32, pcm_s32le, "PCM signed 32-bit little-endian");
532 PCM_CODEC (CODEC_ID_PCM_U8, AV_SAMPLE_FMT_U8, pcm_u8, "PCM unsigned 8-bit");
533 PCM_CODEC (CODEC_ID_PCM_U16BE, AV_SAMPLE_FMT_S16, pcm_u16be, "PCM unsigned 16-bit big-endian");
534 PCM_CODEC (CODEC_ID_PCM_U16LE, AV_SAMPLE_FMT_S16, pcm_u16le, "PCM unsigned 16-bit little-endian");
535 PCM_CODEC (CODEC_ID_PCM_U24BE, AV_SAMPLE_FMT_S32, pcm_u24be, "PCM unsigned 24-bit big-endian");
536 PCM_CODEC (CODEC_ID_PCM_U24LE, AV_SAMPLE_FMT_S32, pcm_u24le, "PCM unsigned 24-bit little-endian");
537 PCM_CODEC (CODEC_ID_PCM_U32BE, AV_SAMPLE_FMT_S32, pcm_u32be, "PCM unsigned 32-bit big-endian");
538 PCM_CODEC (CODEC_ID_PCM_U32LE, AV_SAMPLE_FMT_S32, pcm_u32le, "PCM unsigned 32-bit little-endian");
539 PCM_DECODER(CODEC_ID_PCM_ZORK, AV_SAMPLE_FMT_U8, pcm_zork, "PCM Zork");