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 static av_cold int pcm_encode_init(AVCodecContext *avctx)
36 avctx->frame_size = 0;
37 switch (avctx->codec->id) {
38 case AV_CODEC_ID_PCM_ALAW:
41 case AV_CODEC_ID_PCM_MULAW:
48 avctx->bits_per_coded_sample = av_get_bits_per_sample(avctx->codec->id);
49 avctx->block_align = avctx->channels * avctx->bits_per_coded_sample / 8;
50 avctx->bit_rate = avctx->block_align * avctx->sample_rate * 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; \
77 for (; n > 0; n--) { \
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_packet2(avctx, avpkt, n * sample_size)))
103 switch (avctx->codec->id) {
104 case AV_CODEC_ID_PCM_U32LE:
105 ENCODE(uint32_t, le32, samples, dst, n, 0, 0x80000000)
107 case AV_CODEC_ID_PCM_U32BE:
108 ENCODE(uint32_t, be32, samples, dst, n, 0, 0x80000000)
110 case AV_CODEC_ID_PCM_S24LE:
111 ENCODE(int32_t, le24, samples, dst, n, 8, 0)
113 case AV_CODEC_ID_PCM_S24BE:
114 ENCODE(int32_t, be24, samples, dst, n, 8, 0)
116 case AV_CODEC_ID_PCM_U24LE:
117 ENCODE(uint32_t, le24, samples, dst, n, 8, 0x800000)
119 case AV_CODEC_ID_PCM_U24BE:
120 ENCODE(uint32_t, be24, samples, dst, n, 8, 0x800000)
122 case AV_CODEC_ID_PCM_S24DAUD:
124 uint32_t tmp = ff_reverse[(*samples >> 8) & 0xff] +
125 (ff_reverse[*samples & 0xff] << 8);
126 tmp <<= 4; // sync flags would go here
127 bytestream_put_be24(&dst, tmp);
131 case AV_CODEC_ID_PCM_U16LE:
132 ENCODE(uint16_t, le16, samples, dst, n, 0, 0x8000)
134 case AV_CODEC_ID_PCM_U16BE:
135 ENCODE(uint16_t, be16, samples, dst, n, 0, 0x8000)
137 case AV_CODEC_ID_PCM_S8:
138 srcu8 = frame->data[0];
145 case AV_CODEC_ID_PCM_F64LE:
146 ENCODE(int64_t, le64, samples, dst, n, 0, 0)
148 case AV_CODEC_ID_PCM_S32LE:
149 case AV_CODEC_ID_PCM_F32LE:
150 ENCODE(int32_t, le32, samples, dst, n, 0, 0)
152 case AV_CODEC_ID_PCM_S16LE:
153 ENCODE(int16_t, le16, samples, dst, n, 0, 0)
155 case AV_CODEC_ID_PCM_F64BE:
156 case AV_CODEC_ID_PCM_F32BE:
157 case AV_CODEC_ID_PCM_S32BE:
158 case AV_CODEC_ID_PCM_S16BE:
160 case AV_CODEC_ID_PCM_F64BE:
161 ENCODE(int64_t, be64, samples, dst, n, 0, 0)
163 case AV_CODEC_ID_PCM_F32BE:
164 case AV_CODEC_ID_PCM_S32BE:
165 ENCODE(int32_t, be32, samples, dst, n, 0, 0)
167 case AV_CODEC_ID_PCM_S16BE:
168 ENCODE(int16_t, be16, samples, dst, n, 0, 0)
170 case AV_CODEC_ID_PCM_F64LE:
171 case AV_CODEC_ID_PCM_F32LE:
172 case AV_CODEC_ID_PCM_S32LE:
173 case AV_CODEC_ID_PCM_S16LE:
174 #endif /* HAVE_BIGENDIAN */
175 case AV_CODEC_ID_PCM_U8:
176 memcpy(dst, samples, n * sample_size);
178 case AV_CODEC_ID_PCM_ALAW:
181 *dst++ = linear_to_alaw[(v + 32768) >> 2];
184 case AV_CODEC_ID_PCM_MULAW:
187 *dst++ = linear_to_ulaw[(v + 32768) >> 2];
198 typedef struct PCMDecode {
203 static av_cold int pcm_decode_init(AVCodecContext *avctx)
205 PCMDecode *s = avctx->priv_data;
208 if (avctx->channels <= 0) {
209 av_log(avctx, AV_LOG_ERROR, "PCM channels out of bounds\n");
210 return AVERROR(EINVAL);
213 switch (avctx->codec_id) {
214 case AV_CODEC_ID_PCM_ALAW:
215 for (i = 0; i < 256; i++)
216 s->table[i] = alaw2linear(i);
218 case AV_CODEC_ID_PCM_MULAW:
219 for (i = 0; i < 256; i++)
220 s->table[i] = ulaw2linear(i);
226 avctx->sample_fmt = avctx->codec->sample_fmts[0];
228 if (avctx->sample_fmt == AV_SAMPLE_FMT_S32)
229 avctx->bits_per_raw_sample = av_get_bits_per_sample(avctx->codec_id);
231 avcodec_get_frame_defaults(&s->frame);
232 avctx->coded_frame = &s->frame;
238 * Read PCM samples macro
239 * @param size Data size of native machine format
240 * @param endian bytestream_get_xxx() endian suffix
241 * @param src Source pointer (variable name)
242 * @param dst Destination pointer (variable name)
243 * @param n Total number of samples (variable name)
244 * @param shift Bitshift (bits)
245 * @param offset Sample value offset
247 #define DECODE(size, endian, src, dst, n, shift, offset) \
248 for (; n > 0; n--) { \
249 uint ## size ## _t v = bytestream_get_ ## endian(&src); \
250 AV_WN ## size ## A(dst, (v - offset) << shift); \
254 #define DECODE_PLANAR(size, endian, src, dst, n, shift, offset) \
255 n /= avctx->channels; \
256 for (c = 0; c < avctx->channels; c++) { \
258 dst = s->frame.extended_data[c]; \
259 for (i = n; i > 0; i--) { \
260 uint ## size ## _t v = bytestream_get_ ## endian(&src); \
261 AV_WN ## size ## A(dst, (v - offset) << shift); \
266 static int pcm_decode_frame(AVCodecContext *avctx, void *data,
267 int *got_frame_ptr, AVPacket *avpkt)
269 const uint8_t *src = avpkt->data;
270 int buf_size = avpkt->size;
271 PCMDecode *s = avctx->priv_data;
272 int sample_size, c, n, ret, samples_per_block;
274 int32_t *dst_int32_t;
276 sample_size = av_get_bits_per_sample(avctx->codec_id) / 8;
278 /* av_get_bits_per_sample returns 0 for AV_CODEC_ID_PCM_DVD */
279 samples_per_block = 1;
280 if (AV_CODEC_ID_PCM_DVD == avctx->codec_id) {
281 if (avctx->bits_per_coded_sample != 20 &&
282 avctx->bits_per_coded_sample != 24) {
283 av_log(avctx, AV_LOG_ERROR,
284 "PCM DVD unsupported sample depth %i\n",
285 avctx->bits_per_coded_sample);
286 return AVERROR(EINVAL);
288 /* 2 samples are interleaved per block in PCM_DVD */
289 samples_per_block = 2;
290 sample_size = avctx->bits_per_coded_sample * 2 / 8;
291 } else if (avctx->codec_id == AV_CODEC_ID_PCM_LXF) {
292 /* we process 40-bit blocks per channel for LXF */
293 samples_per_block = 2;
297 if (sample_size == 0) {
298 av_log(avctx, AV_LOG_ERROR, "Invalid sample_size\n");
299 return AVERROR(EINVAL);
302 if (avctx->channels == 0) {
303 av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n");
304 return AVERROR(EINVAL);
307 n = avctx->channels * sample_size;
309 if (n && buf_size % n) {
311 av_log(avctx, AV_LOG_ERROR,
312 "Invalid PCM packet, data has size %d but at least a size of %d was expected\n",
314 return AVERROR_INVALIDDATA;
316 buf_size -= buf_size % n;
319 n = buf_size / sample_size;
321 /* get output buffer */
322 s->frame.nb_samples = n * samples_per_block / avctx->channels;
323 if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
324 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
327 samples = s->frame.data[0];
329 switch (avctx->codec_id) {
330 case AV_CODEC_ID_PCM_U32LE:
331 DECODE(32, le32, src, samples, n, 0, 0x80000000)
333 case AV_CODEC_ID_PCM_U32BE:
334 DECODE(32, be32, src, samples, n, 0, 0x80000000)
336 case AV_CODEC_ID_PCM_S24LE:
337 DECODE(32, le24, src, samples, n, 8, 0)
339 case AV_CODEC_ID_PCM_S24BE:
340 DECODE(32, be24, src, samples, n, 8, 0)
342 case AV_CODEC_ID_PCM_U24LE:
343 DECODE(32, le24, src, samples, n, 8, 0x800000)
345 case AV_CODEC_ID_PCM_U24BE:
346 DECODE(32, be24, src, samples, n, 8, 0x800000)
348 case AV_CODEC_ID_PCM_S24DAUD:
350 uint32_t v = bytestream_get_be24(&src);
351 v >>= 4; // sync flags are here
352 AV_WN16A(samples, ff_reverse[(v >> 8) & 0xff] +
353 (ff_reverse[v & 0xff] << 8));
357 case AV_CODEC_ID_PCM_S16BE_PLANAR:
358 DECODE_PLANAR(16, be16, src, samples, n, 0, 0);
360 case AV_CODEC_ID_PCM_S16LE_PLANAR:
361 DECODE_PLANAR(16, le16, src, samples, n, 0, 0);
363 case AV_CODEC_ID_PCM_S24LE_PLANAR:
364 DECODE_PLANAR(32, le24, src, samples, n, 8, 0);
366 case AV_CODEC_ID_PCM_S32LE_PLANAR:
367 DECODE_PLANAR(32, le32, src, samples, n, 0, 0);
369 case AV_CODEC_ID_PCM_U16LE:
370 DECODE(16, le16, src, samples, n, 0, 0x8000)
372 case AV_CODEC_ID_PCM_U16BE:
373 DECODE(16, be16, src, samples, n, 0, 0x8000)
375 case AV_CODEC_ID_PCM_S8:
377 *samples++ = *src++ + 128;
380 case AV_CODEC_ID_PCM_F64LE:
381 DECODE(64, le64, src, samples, n, 0, 0)
383 case AV_CODEC_ID_PCM_S32LE:
384 case AV_CODEC_ID_PCM_F32LE:
385 DECODE(32, le32, src, samples, n, 0, 0)
387 case AV_CODEC_ID_PCM_S16LE:
388 DECODE(16, le16, src, samples, n, 0, 0)
390 case AV_CODEC_ID_PCM_F64BE:
391 case AV_CODEC_ID_PCM_F32BE:
392 case AV_CODEC_ID_PCM_S32BE:
393 case AV_CODEC_ID_PCM_S16BE:
395 case AV_CODEC_ID_PCM_F64BE:
396 DECODE(64, be64, src, samples, n, 0, 0)
398 case AV_CODEC_ID_PCM_F32BE:
399 case AV_CODEC_ID_PCM_S32BE:
400 DECODE(32, be32, src, samples, n, 0, 0)
402 case AV_CODEC_ID_PCM_S16BE:
403 DECODE(16, be16, src, samples, n, 0, 0)
405 case AV_CODEC_ID_PCM_F64LE:
406 case AV_CODEC_ID_PCM_F32LE:
407 case AV_CODEC_ID_PCM_S32LE:
408 case AV_CODEC_ID_PCM_S16LE:
409 #endif /* HAVE_BIGENDIAN */
410 case AV_CODEC_ID_PCM_U8:
411 memcpy(samples, src, n * sample_size);
413 case AV_CODEC_ID_PCM_ZORK:
421 case AV_CODEC_ID_PCM_ALAW:
422 case AV_CODEC_ID_PCM_MULAW:
424 AV_WN16A(samples, s->table[*src++]);
428 case AV_CODEC_ID_PCM_DVD:
431 dst_int32_t = (int32_t *)s->frame.data[0];
432 n /= avctx->channels;
433 switch (avctx->bits_per_coded_sample) {
439 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8 & 0xf0) << 8);
440 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++ & 0x0f) << 12);
450 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);
451 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);
459 case AV_CODEC_ID_PCM_LXF:
462 n /= avctx->channels;
463 for (c = 0; c < avctx->channels; c++) {
464 dst_int32_t = (int32_t *)s->frame.extended_data[c];
465 for (i = 0; i < n; i++) {
466 // extract low 20 bits and expand to 32 bits
467 *dst_int32_t++ = (src[2] << 28) |
470 ((src[2] & 0x0F) << 8) |
472 // extract high 20 bits and expand to 32 bits
473 *dst_int32_t++ = (src[4] << 24) |
475 ((src[2] & 0xF0) << 8) |
488 *(AVFrame *)data = s->frame;
493 #define PCM_ENCODER_0(id_, sample_fmt_, name_, long_name_)
494 #define PCM_ENCODER_1(id_, sample_fmt_, name_, long_name_) \
495 AVCodec ff_ ## name_ ## _encoder = { \
497 .type = AVMEDIA_TYPE_AUDIO, \
498 .id = AV_CODEC_ID_ ## id_, \
499 .init = pcm_encode_init, \
500 .encode2 = pcm_encode_frame, \
501 .close = pcm_encode_close, \
502 .capabilities = CODEC_CAP_VARIABLE_FRAME_SIZE, \
503 .sample_fmts = (const enum AVSampleFormat[]){ sample_fmt_, \
504 AV_SAMPLE_FMT_NONE }, \
505 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
508 #define PCM_ENCODER_2(cf, id, sample_fmt, name, long_name) \
509 PCM_ENCODER_ ## cf(id, sample_fmt, name, long_name)
510 #define PCM_ENCODER_3(cf, id, sample_fmt, name, long_name) \
511 PCM_ENCODER_2(cf, id, sample_fmt, name, long_name)
512 #define PCM_ENCODER(id, sample_fmt, name, long_name) \
513 PCM_ENCODER_3(CONFIG_ ## id ## _ENCODER, id, sample_fmt, name, long_name)
515 #define PCM_DECODER_0(id, sample_fmt, name, long_name)
516 #define PCM_DECODER_1(id_, sample_fmt_, name_, long_name_) \
517 AVCodec ff_ ## name_ ## _decoder = { \
519 .type = AVMEDIA_TYPE_AUDIO, \
520 .id = AV_CODEC_ID_ ## id_, \
521 .priv_data_size = sizeof(PCMDecode), \
522 .init = pcm_decode_init, \
523 .decode = pcm_decode_frame, \
524 .capabilities = CODEC_CAP_DR1, \
525 .sample_fmts = (const enum AVSampleFormat[]){ sample_fmt_, \
526 AV_SAMPLE_FMT_NONE }, \
527 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
530 #define PCM_DECODER_2(cf, id, sample_fmt, name, long_name) \
531 PCM_DECODER_ ## cf(id, sample_fmt, name, long_name)
532 #define PCM_DECODER_3(cf, id, sample_fmt, name, long_name) \
533 PCM_DECODER_2(cf, id, sample_fmt, name, long_name)
534 #define PCM_DECODER(id, sample_fmt, name, long_name) \
535 PCM_DECODER_3(CONFIG_ ## id ## _DECODER, id, sample_fmt, name, long_name)
537 #define PCM_CODEC(id, sample_fmt_, name, long_name_) \
538 PCM_ENCODER(id, sample_fmt_, name, long_name_); \
539 PCM_DECODER(id, sample_fmt_, name, long_name_)
541 /* Note: Do not forget to add new entries to the Makefile as well. */
542 PCM_CODEC (PCM_ALAW, AV_SAMPLE_FMT_S16, pcm_alaw, "PCM A-law / G.711 A-law");
543 PCM_DECODER(PCM_DVD, AV_SAMPLE_FMT_S32, pcm_dvd, "PCM signed 20|24-bit big-endian");
544 PCM_CODEC (PCM_F32BE, AV_SAMPLE_FMT_FLT, pcm_f32be, "PCM 32-bit floating point big-endian");
545 PCM_CODEC (PCM_F32LE, AV_SAMPLE_FMT_FLT, pcm_f32le, "PCM 32-bit floating point little-endian");
546 PCM_CODEC (PCM_F64BE, AV_SAMPLE_FMT_DBL, pcm_f64be, "PCM 64-bit floating point big-endian");
547 PCM_CODEC (PCM_F64LE, AV_SAMPLE_FMT_DBL, pcm_f64le, "PCM 64-bit floating point little-endian");
548 PCM_DECODER(PCM_LXF, AV_SAMPLE_FMT_S32P,pcm_lxf, "PCM signed 20-bit little-endian planar");
549 PCM_CODEC (PCM_MULAW, AV_SAMPLE_FMT_S16, pcm_mulaw, "PCM mu-law / G.711 mu-law");
550 PCM_CODEC (PCM_S8, AV_SAMPLE_FMT_U8, pcm_s8, "PCM signed 8-bit");
551 PCM_CODEC (PCM_S16BE, AV_SAMPLE_FMT_S16, pcm_s16be, "PCM signed 16-bit big-endian");
552 PCM_DECODER(PCM_S16BE_PLANAR, AV_SAMPLE_FMT_S16P,pcm_s16be_planar, "PCM signed 16-bit big-endian planar");
553 PCM_CODEC (PCM_S16LE, AV_SAMPLE_FMT_S16, pcm_s16le, "PCM signed 16-bit little-endian");
554 PCM_DECODER(PCM_S16LE_PLANAR, AV_SAMPLE_FMT_S16P,pcm_s16le_planar, "PCM signed 16-bit little-endian planar");
555 PCM_CODEC (PCM_S24BE, AV_SAMPLE_FMT_S32, pcm_s24be, "PCM signed 24-bit big-endian");
556 PCM_CODEC (PCM_S24DAUD, AV_SAMPLE_FMT_S16, pcm_s24daud, "PCM D-Cinema audio signed 24-bit");
557 PCM_CODEC (PCM_S24LE, AV_SAMPLE_FMT_S32, pcm_s24le, "PCM signed 24-bit little-endian");
558 PCM_DECODER(PCM_S24LE_PLANAR, AV_SAMPLE_FMT_S32P,pcm_s24le_planar, "PCM signed 24-bit little-endian planar");
559 PCM_CODEC (PCM_S32BE, AV_SAMPLE_FMT_S32, pcm_s32be, "PCM signed 32-bit big-endian");
560 PCM_CODEC (PCM_S32LE, AV_SAMPLE_FMT_S32, pcm_s32le, "PCM signed 32-bit little-endian");
561 PCM_DECODER(PCM_S32LE_PLANAR, AV_SAMPLE_FMT_S32P,pcm_s32le_planar, "PCM signed 32-bit little-endian planar");
562 PCM_CODEC (PCM_U8, AV_SAMPLE_FMT_U8, pcm_u8, "PCM unsigned 8-bit");
563 PCM_CODEC (PCM_U16BE, AV_SAMPLE_FMT_S16, pcm_u16be, "PCM unsigned 16-bit big-endian");
564 PCM_CODEC (PCM_U16LE, AV_SAMPLE_FMT_S16, pcm_u16le, "PCM unsigned 16-bit little-endian");
565 PCM_CODEC (PCM_U24BE, AV_SAMPLE_FMT_S32, pcm_u24be, "PCM unsigned 24-bit big-endian");
566 PCM_CODEC (PCM_U24LE, AV_SAMPLE_FMT_S32, pcm_u24le, "PCM unsigned 24-bit little-endian");
567 PCM_CODEC (PCM_U32BE, AV_SAMPLE_FMT_S32, pcm_u32be, "PCM unsigned 32-bit big-endian");
568 PCM_CODEC (PCM_U32LE, AV_SAMPLE_FMT_S32, pcm_u32le, "PCM unsigned 32-bit little-endian");
569 PCM_DECODER(PCM_ZORK, AV_SAMPLE_FMT_U8, pcm_zork, "PCM Zork");