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
27 #include "libavutil/attributes.h"
29 #include "bytestream.h"
32 #include "pcm_tablegen.h"
34 #define MAX_CHANNELS 64
36 static av_cold int pcm_encode_init(AVCodecContext *avctx)
38 avctx->frame_size = 0;
39 switch (avctx->codec->id) {
40 case AV_CODEC_ID_PCM_ALAW:
43 case AV_CODEC_ID_PCM_MULAW:
50 avctx->bits_per_coded_sample = av_get_bits_per_sample(avctx->codec->id);
51 avctx->block_align = avctx->channels * avctx->bits_per_coded_sample / 8;
52 avctx->bit_rate = avctx->block_align * avctx->sample_rate * 8;
53 avctx->coded_frame = avcodec_alloc_frame();
54 if (!avctx->coded_frame)
55 return AVERROR(ENOMEM);
60 static av_cold int pcm_encode_close(AVCodecContext *avctx)
62 av_freep(&avctx->coded_frame);
68 * Write PCM samples macro
69 * @param type Datatype of native machine format
70 * @param endian bytestream_put_xxx() suffix
71 * @param src Source pointer (variable name)
72 * @param dst Destination pointer (variable name)
73 * @param n Total number of samples (variable name)
74 * @param shift Bitshift (bits)
75 * @param offset Sample value offset
77 #define ENCODE(type, endian, src, dst, n, shift, offset) \
78 samples_ ## type = (const type *) src; \
79 for (; n > 0; n--) { \
80 register type v = (*samples_ ## type++ >> shift) + offset; \
81 bytestream_put_ ## endian(&dst, v); \
84 static int pcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
85 const AVFrame *frame, int *got_packet_ptr)
87 int n, sample_size, v, ret;
91 const int16_t *samples_int16_t;
92 const int32_t *samples_int32_t;
93 const int64_t *samples_int64_t;
94 const uint16_t *samples_uint16_t;
95 const uint32_t *samples_uint32_t;
97 sample_size = av_get_bits_per_sample(avctx->codec->id) / 8;
98 n = frame->nb_samples * avctx->channels;
99 samples = (const short *)frame->data[0];
101 if ((ret = ff_alloc_packet2(avctx, avpkt, n * sample_size)))
105 switch (avctx->codec->id) {
106 case AV_CODEC_ID_PCM_U32LE:
107 ENCODE(uint32_t, le32, samples, dst, n, 0, 0x80000000)
109 case AV_CODEC_ID_PCM_U32BE:
110 ENCODE(uint32_t, be32, samples, dst, n, 0, 0x80000000)
112 case AV_CODEC_ID_PCM_S24LE:
113 ENCODE(int32_t, le24, samples, dst, n, 8, 0)
115 case AV_CODEC_ID_PCM_S24BE:
116 ENCODE(int32_t, be24, samples, dst, n, 8, 0)
118 case AV_CODEC_ID_PCM_U24LE:
119 ENCODE(uint32_t, le24, samples, dst, n, 8, 0x800000)
121 case AV_CODEC_ID_PCM_U24BE:
122 ENCODE(uint32_t, be24, samples, dst, n, 8, 0x800000)
124 case AV_CODEC_ID_PCM_S24DAUD:
126 uint32_t tmp = ff_reverse[(*samples >> 8) & 0xff] +
127 (ff_reverse[*samples & 0xff] << 8);
128 tmp <<= 4; // sync flags would go here
129 bytestream_put_be24(&dst, tmp);
133 case AV_CODEC_ID_PCM_U16LE:
134 ENCODE(uint16_t, le16, samples, dst, n, 0, 0x8000)
136 case AV_CODEC_ID_PCM_U16BE:
137 ENCODE(uint16_t, be16, samples, dst, n, 0, 0x8000)
139 case AV_CODEC_ID_PCM_S8:
140 srcu8 = frame->data[0];
147 case AV_CODEC_ID_PCM_F64LE:
148 ENCODE(int64_t, le64, samples, dst, n, 0, 0)
150 case AV_CODEC_ID_PCM_S32LE:
151 case AV_CODEC_ID_PCM_F32LE:
152 ENCODE(int32_t, le32, samples, dst, n, 0, 0)
154 case AV_CODEC_ID_PCM_S16LE:
155 ENCODE(int16_t, le16, samples, dst, n, 0, 0)
157 case AV_CODEC_ID_PCM_F64BE:
158 case AV_CODEC_ID_PCM_F32BE:
159 case AV_CODEC_ID_PCM_S32BE:
160 case AV_CODEC_ID_PCM_S16BE:
162 case AV_CODEC_ID_PCM_F64BE:
163 ENCODE(int64_t, be64, samples, dst, n, 0, 0)
165 case AV_CODEC_ID_PCM_F32BE:
166 case AV_CODEC_ID_PCM_S32BE:
167 ENCODE(int32_t, be32, samples, dst, n, 0, 0)
169 case AV_CODEC_ID_PCM_S16BE:
170 ENCODE(int16_t, be16, samples, dst, n, 0, 0)
172 case AV_CODEC_ID_PCM_F64LE:
173 case AV_CODEC_ID_PCM_F32LE:
174 case AV_CODEC_ID_PCM_S32LE:
175 case AV_CODEC_ID_PCM_S16LE:
176 #endif /* HAVE_BIGENDIAN */
177 case AV_CODEC_ID_PCM_U8:
178 memcpy(dst, samples, n * sample_size);
179 dst += n * sample_size;
181 case AV_CODEC_ID_PCM_ALAW:
184 *dst++ = linear_to_alaw[(v + 32768) >> 2];
187 case AV_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 AV_CODEC_ID_PCM_ALAW:
218 for (i = 0; i < 256; i++)
219 s->table[i] = alaw2linear(i);
221 case AV_CODEC_ID_PCM_MULAW:
222 for (i = 0; i < 256; i++)
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) \
251 for (; n > 0; n--) { \
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 AV_CODEC_ID_PCM_DVD */
270 samples_per_block = 1;
271 if (AV_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 == AV_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,
298 "Invalid PCM packet, data has size %d but at least a size of %d was expected\n",
300 return AVERROR_INVALIDDATA;
302 buf_size -= buf_size % n;
305 n = buf_size / sample_size;
307 /* get output buffer */
308 s->frame.nb_samples = n * samples_per_block / avctx->channels;
309 if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
310 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
313 samples = s->frame.data[0];
315 switch (avctx->codec->id) {
316 case AV_CODEC_ID_PCM_U32LE:
317 DECODE(32, le32, src, samples, n, 0, 0x80000000)
319 case AV_CODEC_ID_PCM_U32BE:
320 DECODE(32, be32, src, samples, n, 0, 0x80000000)
322 case AV_CODEC_ID_PCM_S24LE:
323 DECODE(32, le24, src, samples, n, 8, 0)
325 case AV_CODEC_ID_PCM_S24BE:
326 DECODE(32, be24, src, samples, n, 8, 0)
328 case AV_CODEC_ID_PCM_U24LE:
329 DECODE(32, le24, src, samples, n, 8, 0x800000)
331 case AV_CODEC_ID_PCM_U24BE:
332 DECODE(32, be24, src, samples, n, 8, 0x800000)
334 case AV_CODEC_ID_PCM_S24DAUD:
336 uint32_t v = bytestream_get_be24(&src);
337 v >>= 4; // sync flags are here
338 AV_WN16A(samples, ff_reverse[(v >> 8) & 0xff] +
339 (ff_reverse[v & 0xff] << 8));
343 case AV_CODEC_ID_PCM_S16LE_PLANAR:
346 n /= avctx->channels;
347 for (c = 0; c < avctx->channels; c++) {
348 samples = s->frame.data[c];
349 for (i = n; i > 0; i--) {
350 AV_WN16A(samples, bytestream_get_le16(&src));
356 case AV_CODEC_ID_PCM_U16LE:
357 DECODE(16, le16, src, samples, n, 0, 0x8000)
359 case AV_CODEC_ID_PCM_U16BE:
360 DECODE(16, be16, src, samples, n, 0, 0x8000)
362 case AV_CODEC_ID_PCM_S8:
364 *samples++ = *src++ + 128;
367 case AV_CODEC_ID_PCM_F64LE:
368 DECODE(64, le64, src, samples, n, 0, 0)
370 case AV_CODEC_ID_PCM_S32LE:
371 case AV_CODEC_ID_PCM_F32LE:
372 DECODE(32, le32, src, samples, n, 0, 0)
374 case AV_CODEC_ID_PCM_S16LE:
375 DECODE(16, le16, src, samples, n, 0, 0)
377 case AV_CODEC_ID_PCM_F64BE:
378 case AV_CODEC_ID_PCM_F32BE:
379 case AV_CODEC_ID_PCM_S32BE:
380 case AV_CODEC_ID_PCM_S16BE:
382 case AV_CODEC_ID_PCM_F64BE:
383 DECODE(64, be64, src, samples, n, 0, 0)
385 case AV_CODEC_ID_PCM_F32BE:
386 case AV_CODEC_ID_PCM_S32BE:
387 DECODE(32, be32, src, samples, n, 0, 0)
389 case AV_CODEC_ID_PCM_S16BE:
390 DECODE(16, be16, src, samples, n, 0, 0)
392 case AV_CODEC_ID_PCM_F64LE:
393 case AV_CODEC_ID_PCM_F32LE:
394 case AV_CODEC_ID_PCM_S32LE:
395 case AV_CODEC_ID_PCM_S16LE:
396 #endif /* HAVE_BIGENDIAN */
397 case AV_CODEC_ID_PCM_U8:
398 memcpy(samples, src, n * sample_size);
400 case AV_CODEC_ID_PCM_ZORK:
408 case AV_CODEC_ID_PCM_ALAW:
409 case AV_CODEC_ID_PCM_MULAW:
411 AV_WN16A(samples, s->table[*src++]);
415 case AV_CODEC_ID_PCM_DVD:
418 dst_int32_t = (int32_t *)s->frame.data[0];
419 n /= avctx->channels;
420 switch (avctx->bits_per_coded_sample) {
426 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8 & 0xf0) << 8);
427 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++ & 0x0f) << 12);
437 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);
438 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);
446 case AV_CODEC_ID_PCM_LXF:
449 n /= avctx->channels;
450 for (c = 0; c < avctx->channels; c++) {
451 dst_int32_t = (int32_t *)s->frame.extended_data[c];
452 for (i = 0; i < n; i++) {
453 // extract low 20 bits and expand to 32 bits
454 *dst_int32_t++ = (src[2] << 28) |
457 ((src[2] & 0x0F) << 8) |
459 // extract high 20 bits and expand to 32 bits
460 *dst_int32_t++ = (src[4] << 24) |
462 ((src[2] & 0xF0) << 8) |
475 *(AVFrame *)data = s->frame;
480 #define PCM_ENCODER_0(id_, sample_fmt_, name_, long_name_)
481 #define PCM_ENCODER_1(id_, sample_fmt_, name_, long_name_) \
482 AVCodec ff_ ## name_ ## _encoder = { \
484 .type = AVMEDIA_TYPE_AUDIO, \
485 .id = AV_CODEC_ID_ ## id_, \
486 .init = pcm_encode_init, \
487 .encode2 = pcm_encode_frame, \
488 .close = pcm_encode_close, \
489 .capabilities = CODEC_CAP_VARIABLE_FRAME_SIZE, \
490 .sample_fmts = (const enum AVSampleFormat[]){ sample_fmt_, \
491 AV_SAMPLE_FMT_NONE }, \
492 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
495 #define PCM_ENCODER_2(cf, id, sample_fmt, name, long_name) \
496 PCM_ENCODER_ ## cf(id, sample_fmt, name, long_name)
497 #define PCM_ENCODER_3(cf, id, sample_fmt, name, long_name) \
498 PCM_ENCODER_2(cf, id, sample_fmt, name, long_name)
499 #define PCM_ENCODER(id, sample_fmt, name, long_name) \
500 PCM_ENCODER_3(CONFIG_ ## id ## _ENCODER, id, sample_fmt, name, long_name)
502 #define PCM_DECODER_0(id, sample_fmt, name, long_name)
503 #define PCM_DECODER_1(id_, sample_fmt_, name_, long_name_) \
504 AVCodec ff_ ## name_ ## _decoder = { \
506 .type = AVMEDIA_TYPE_AUDIO, \
507 .id = AV_CODEC_ID_ ## id_, \
508 .priv_data_size = sizeof(PCMDecode), \
509 .init = pcm_decode_init, \
510 .decode = pcm_decode_frame, \
511 .capabilities = CODEC_CAP_DR1, \
512 .sample_fmts = (const enum AVSampleFormat[]){ sample_fmt_, \
513 AV_SAMPLE_FMT_NONE }, \
514 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
517 #define PCM_DECODER_2(cf, id, sample_fmt, name, long_name) \
518 PCM_DECODER_ ## cf(id, sample_fmt, name, long_name)
519 #define PCM_DECODER_3(cf, id, sample_fmt, name, long_name) \
520 PCM_DECODER_2(cf, id, sample_fmt, name, long_name)
521 #define PCM_DECODER(id, sample_fmt, name, long_name) \
522 PCM_DECODER_3(CONFIG_ ## id ## _DECODER, id, sample_fmt, name, long_name)
524 #define PCM_CODEC(id, sample_fmt_, name, long_name_) \
525 PCM_ENCODER(id, sample_fmt_, name, long_name_); \
526 PCM_DECODER(id, sample_fmt_, name, long_name_)
528 /* Note: Do not forget to add new entries to the Makefile as well. */
529 PCM_CODEC (PCM_ALAW, AV_SAMPLE_FMT_S16, pcm_alaw, "PCM A-law / G.711 A-law");
530 PCM_DECODER(PCM_DVD, AV_SAMPLE_FMT_S32, pcm_dvd, "PCM signed 20|24-bit big-endian");
531 PCM_CODEC (PCM_F32BE, AV_SAMPLE_FMT_FLT, pcm_f32be, "PCM 32-bit floating point big-endian");
532 PCM_CODEC (PCM_F32LE, AV_SAMPLE_FMT_FLT, pcm_f32le, "PCM 32-bit floating point little-endian");
533 PCM_CODEC (PCM_F64BE, AV_SAMPLE_FMT_DBL, pcm_f64be, "PCM 64-bit floating point big-endian");
534 PCM_CODEC (PCM_F64LE, AV_SAMPLE_FMT_DBL, pcm_f64le, "PCM 64-bit floating point little-endian");
535 PCM_DECODER(PCM_LXF, AV_SAMPLE_FMT_S32P,pcm_lxf, "PCM signed 20-bit little-endian planar");
536 PCM_CODEC (PCM_MULAW, AV_SAMPLE_FMT_S16, pcm_mulaw, "PCM mu-law / G.711 mu-law");
537 PCM_CODEC (PCM_S8, AV_SAMPLE_FMT_U8, pcm_s8, "PCM signed 8-bit");
538 PCM_CODEC (PCM_S16BE, AV_SAMPLE_FMT_S16, pcm_s16be, "PCM signed 16-bit big-endian");
539 PCM_CODEC (PCM_S16LE, AV_SAMPLE_FMT_S16, pcm_s16le, "PCM signed 16-bit little-endian");
540 PCM_DECODER(PCM_S16LE_PLANAR, AV_SAMPLE_FMT_S16P,pcm_s16le_planar, "PCM 16-bit little-endian planar");
541 PCM_CODEC (PCM_S24BE, AV_SAMPLE_FMT_S32, pcm_s24be, "PCM signed 24-bit big-endian");
542 PCM_CODEC (PCM_S24DAUD, AV_SAMPLE_FMT_S16, pcm_s24daud, "PCM D-Cinema audio signed 24-bit");
543 PCM_CODEC (PCM_S24LE, AV_SAMPLE_FMT_S32, pcm_s24le, "PCM signed 24-bit little-endian");
544 PCM_CODEC (PCM_S32BE, AV_SAMPLE_FMT_S32, pcm_s32be, "PCM signed 32-bit big-endian");
545 PCM_CODEC (PCM_S32LE, AV_SAMPLE_FMT_S32, pcm_s32le, "PCM signed 32-bit little-endian");
546 PCM_CODEC (PCM_U8, AV_SAMPLE_FMT_U8, pcm_u8, "PCM unsigned 8-bit");
547 PCM_CODEC (PCM_U16BE, AV_SAMPLE_FMT_S16, pcm_u16be, "PCM unsigned 16-bit big-endian");
548 PCM_CODEC (PCM_U16LE, AV_SAMPLE_FMT_S16, pcm_u16le, "PCM unsigned 16-bit little-endian");
549 PCM_CODEC (PCM_U24BE, AV_SAMPLE_FMT_S32, pcm_u24be, "PCM unsigned 24-bit big-endian");
550 PCM_CODEC (PCM_U24LE, AV_SAMPLE_FMT_S32, pcm_u24le, "PCM unsigned 24-bit little-endian");
551 PCM_CODEC (PCM_U32BE, AV_SAMPLE_FMT_S32, pcm_u32be, "PCM unsigned 32-bit big-endian");
552 PCM_CODEC (PCM_U32LE, AV_SAMPLE_FMT_S32, pcm_u32le, "PCM unsigned 32-bit little-endian");
553 PCM_DECODER(PCM_ZORK, AV_SAMPLE_FMT_U8, pcm_zork, "PCM Zork");