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);
177 dst += n * sample_size;
179 case AV_CODEC_ID_PCM_ALAW:
182 *dst++ = linear_to_alaw[(v + 32768) >> 2];
185 case AV_CODEC_ID_PCM_MULAW:
188 *dst++ = linear_to_ulaw[(v + 32768) >> 2];
199 typedef struct PCMDecode {
204 static av_cold int pcm_decode_init(AVCodecContext *avctx)
206 PCMDecode *s = avctx->priv_data;
209 if (avctx->channels <= 0) {
210 av_log(avctx, AV_LOG_ERROR, "PCM channels out of bounds\n");
211 return AVERROR(EINVAL);
214 switch (avctx->codec->id) {
215 case AV_CODEC_ID_PCM_ALAW:
216 for (i = 0; i < 256; i++)
217 s->table[i] = alaw2linear(i);
219 case AV_CODEC_ID_PCM_MULAW:
220 for (i = 0; i < 256; i++)
221 s->table[i] = ulaw2linear(i);
227 avctx->sample_fmt = avctx->codec->sample_fmts[0];
229 if (avctx->sample_fmt == AV_SAMPLE_FMT_S32)
230 avctx->bits_per_raw_sample = av_get_bits_per_sample(avctx->codec->id);
232 avcodec_get_frame_defaults(&s->frame);
233 avctx->coded_frame = &s->frame;
239 * Read PCM samples macro
240 * @param size Data size of native machine format
241 * @param endian bytestream_get_xxx() endian suffix
242 * @param src Source pointer (variable name)
243 * @param dst Destination pointer (variable name)
244 * @param n Total number of samples (variable name)
245 * @param shift Bitshift (bits)
246 * @param offset Sample value offset
248 #define DECODE(size, endian, src, dst, n, shift, offset) \
249 for (; n > 0; n--) { \
250 uint ## size ## _t v = bytestream_get_ ## endian(&src); \
251 AV_WN ## size ## A(dst, (v - offset) << shift); \
255 static int pcm_decode_frame(AVCodecContext *avctx, void *data,
256 int *got_frame_ptr, AVPacket *avpkt)
258 const uint8_t *src = avpkt->data;
259 int buf_size = avpkt->size;
260 PCMDecode *s = avctx->priv_data;
261 int sample_size, c, n, ret, samples_per_block;
263 int32_t *dst_int32_t;
265 sample_size = av_get_bits_per_sample(avctx->codec_id) / 8;
267 /* av_get_bits_per_sample returns 0 for AV_CODEC_ID_PCM_DVD */
268 samples_per_block = 1;
269 if (AV_CODEC_ID_PCM_DVD == avctx->codec_id) {
270 if (avctx->bits_per_coded_sample != 20 &&
271 avctx->bits_per_coded_sample != 24) {
272 av_log(avctx, AV_LOG_ERROR,
273 "PCM DVD unsupported sample depth %i\n",
274 avctx->bits_per_coded_sample);
275 return AVERROR(EINVAL);
277 /* 2 samples are interleaved per block in PCM_DVD */
278 samples_per_block = 2;
279 sample_size = avctx->bits_per_coded_sample * 2 / 8;
280 } else if (avctx->codec_id == AV_CODEC_ID_PCM_LXF) {
281 /* we process 40-bit blocks per channel for LXF */
282 samples_per_block = 2;
286 if (sample_size == 0) {
287 av_log(avctx, AV_LOG_ERROR, "Invalid sample_size\n");
288 return AVERROR(EINVAL);
291 n = avctx->channels * sample_size;
293 if (n && buf_size % n) {
295 av_log(avctx, AV_LOG_ERROR,
296 "Invalid PCM packet, data has size %d but at least a size of %d was expected\n",
298 return AVERROR_INVALIDDATA;
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 AV_CODEC_ID_PCM_U32LE:
315 DECODE(32, le32, src, samples, n, 0, 0x80000000)
317 case AV_CODEC_ID_PCM_U32BE:
318 DECODE(32, be32, src, samples, n, 0, 0x80000000)
320 case AV_CODEC_ID_PCM_S24LE:
321 DECODE(32, le24, src, samples, n, 8, 0)
323 case AV_CODEC_ID_PCM_S24BE:
324 DECODE(32, be24, src, samples, n, 8, 0)
326 case AV_CODEC_ID_PCM_U24LE:
327 DECODE(32, le24, src, samples, n, 8, 0x800000)
329 case AV_CODEC_ID_PCM_U24BE:
330 DECODE(32, be24, src, samples, n, 8, 0x800000)
332 case AV_CODEC_ID_PCM_S24DAUD:
334 uint32_t v = bytestream_get_be24(&src);
335 v >>= 4; // sync flags are here
336 AV_WN16A(samples, ff_reverse[(v >> 8) & 0xff] +
337 (ff_reverse[v & 0xff] << 8));
341 case AV_CODEC_ID_PCM_S16LE_PLANAR:
344 n /= avctx->channels;
345 for (c = 0; c < avctx->channels; c++) {
346 samples = s->frame.data[c];
347 for (i = n; i > 0; i--) {
348 AV_WN16A(samples, bytestream_get_le16(&src));
354 case AV_CODEC_ID_PCM_U16LE:
355 DECODE(16, le16, src, samples, n, 0, 0x8000)
357 case AV_CODEC_ID_PCM_U16BE:
358 DECODE(16, be16, src, samples, n, 0, 0x8000)
360 case AV_CODEC_ID_PCM_S8:
362 *samples++ = *src++ + 128;
365 case AV_CODEC_ID_PCM_F64LE:
366 DECODE(64, le64, src, samples, n, 0, 0)
368 case AV_CODEC_ID_PCM_S32LE:
369 case AV_CODEC_ID_PCM_F32LE:
370 DECODE(32, le32, src, samples, n, 0, 0)
372 case AV_CODEC_ID_PCM_S16LE:
373 DECODE(16, le16, src, samples, n, 0, 0)
375 case AV_CODEC_ID_PCM_F64BE:
376 case AV_CODEC_ID_PCM_F32BE:
377 case AV_CODEC_ID_PCM_S32BE:
378 case AV_CODEC_ID_PCM_S16BE:
380 case AV_CODEC_ID_PCM_F64BE:
381 DECODE(64, be64, src, samples, n, 0, 0)
383 case AV_CODEC_ID_PCM_F32BE:
384 case AV_CODEC_ID_PCM_S32BE:
385 DECODE(32, be32, src, samples, n, 0, 0)
387 case AV_CODEC_ID_PCM_S16BE:
388 DECODE(16, be16, src, samples, n, 0, 0)
390 case AV_CODEC_ID_PCM_F64LE:
391 case AV_CODEC_ID_PCM_F32LE:
392 case AV_CODEC_ID_PCM_S32LE:
393 case AV_CODEC_ID_PCM_S16LE:
394 #endif /* HAVE_BIGENDIAN */
395 case AV_CODEC_ID_PCM_U8:
396 memcpy(samples, src, n * sample_size);
398 case AV_CODEC_ID_PCM_ZORK:
406 case AV_CODEC_ID_PCM_ALAW:
407 case AV_CODEC_ID_PCM_MULAW:
409 AV_WN16A(samples, s->table[*src++]);
413 case AV_CODEC_ID_PCM_DVD:
416 dst_int32_t = (int32_t *)s->frame.data[0];
417 n /= avctx->channels;
418 switch (avctx->bits_per_coded_sample) {
424 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8 & 0xf0) << 8);
425 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++ & 0x0f) << 12);
435 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);
436 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);
444 case AV_CODEC_ID_PCM_LXF:
447 n /= avctx->channels;
448 for (c = 0; c < avctx->channels; c++) {
449 dst_int32_t = (int32_t *)s->frame.extended_data[c];
450 for (i = 0; i < n; i++) {
451 // extract low 20 bits and expand to 32 bits
452 *dst_int32_t++ = (src[2] << 28) |
455 ((src[2] & 0x0F) << 8) |
457 // extract high 20 bits and expand to 32 bits
458 *dst_int32_t++ = (src[4] << 24) |
460 ((src[2] & 0xF0) << 8) |
473 *(AVFrame *)data = s->frame;
478 #define PCM_ENCODER_0(id_, sample_fmt_, name_, long_name_)
479 #define PCM_ENCODER_1(id_, sample_fmt_, name_, long_name_) \
480 AVCodec ff_ ## name_ ## _encoder = { \
482 .type = AVMEDIA_TYPE_AUDIO, \
483 .id = AV_CODEC_ID_ ## id_, \
484 .init = pcm_encode_init, \
485 .encode2 = pcm_encode_frame, \
486 .close = pcm_encode_close, \
487 .capabilities = CODEC_CAP_VARIABLE_FRAME_SIZE, \
488 .sample_fmts = (const enum AVSampleFormat[]){ sample_fmt_, \
489 AV_SAMPLE_FMT_NONE }, \
490 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
493 #define PCM_ENCODER_2(cf, id, sample_fmt, name, long_name) \
494 PCM_ENCODER_ ## cf(id, sample_fmt, name, long_name)
495 #define PCM_ENCODER_3(cf, id, sample_fmt, name, long_name) \
496 PCM_ENCODER_2(cf, id, sample_fmt, name, long_name)
497 #define PCM_ENCODER(id, sample_fmt, name, long_name) \
498 PCM_ENCODER_3(CONFIG_ ## id ## _ENCODER, id, sample_fmt, name, long_name)
500 #define PCM_DECODER_0(id, sample_fmt, name, long_name)
501 #define PCM_DECODER_1(id_, sample_fmt_, name_, long_name_) \
502 AVCodec ff_ ## name_ ## _decoder = { \
504 .type = AVMEDIA_TYPE_AUDIO, \
505 .id = AV_CODEC_ID_ ## id_, \
506 .priv_data_size = sizeof(PCMDecode), \
507 .init = pcm_decode_init, \
508 .decode = pcm_decode_frame, \
509 .capabilities = CODEC_CAP_DR1, \
510 .sample_fmts = (const enum AVSampleFormat[]){ sample_fmt_, \
511 AV_SAMPLE_FMT_NONE }, \
512 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
515 #define PCM_DECODER_2(cf, id, sample_fmt, name, long_name) \
516 PCM_DECODER_ ## cf(id, sample_fmt, name, long_name)
517 #define PCM_DECODER_3(cf, id, sample_fmt, name, long_name) \
518 PCM_DECODER_2(cf, id, sample_fmt, name, long_name)
519 #define PCM_DECODER(id, sample_fmt, name, long_name) \
520 PCM_DECODER_3(CONFIG_ ## id ## _DECODER, id, sample_fmt, name, long_name)
522 #define PCM_CODEC(id, sample_fmt_, name, long_name_) \
523 PCM_ENCODER(id, sample_fmt_, name, long_name_); \
524 PCM_DECODER(id, sample_fmt_, name, long_name_)
526 /* Note: Do not forget to add new entries to the Makefile as well. */
527 PCM_CODEC (PCM_ALAW, AV_SAMPLE_FMT_S16, pcm_alaw, "PCM A-law / G.711 A-law");
528 PCM_DECODER(PCM_DVD, AV_SAMPLE_FMT_S32, pcm_dvd, "PCM signed 20|24-bit big-endian");
529 PCM_CODEC (PCM_F32BE, AV_SAMPLE_FMT_FLT, pcm_f32be, "PCM 32-bit floating point big-endian");
530 PCM_CODEC (PCM_F32LE, AV_SAMPLE_FMT_FLT, pcm_f32le, "PCM 32-bit floating point little-endian");
531 PCM_CODEC (PCM_F64BE, AV_SAMPLE_FMT_DBL, pcm_f64be, "PCM 64-bit floating point big-endian");
532 PCM_CODEC (PCM_F64LE, AV_SAMPLE_FMT_DBL, pcm_f64le, "PCM 64-bit floating point little-endian");
533 PCM_DECODER(PCM_LXF, AV_SAMPLE_FMT_S32P,pcm_lxf, "PCM signed 20-bit little-endian planar");
534 PCM_CODEC (PCM_MULAW, AV_SAMPLE_FMT_S16, pcm_mulaw, "PCM mu-law / G.711 mu-law");
535 PCM_CODEC (PCM_S8, AV_SAMPLE_FMT_U8, pcm_s8, "PCM signed 8-bit");
536 PCM_CODEC (PCM_S16BE, AV_SAMPLE_FMT_S16, pcm_s16be, "PCM signed 16-bit big-endian");
537 PCM_CODEC (PCM_S16LE, AV_SAMPLE_FMT_S16, pcm_s16le, "PCM signed 16-bit little-endian");
538 PCM_DECODER(PCM_S16LE_PLANAR, AV_SAMPLE_FMT_S16P,pcm_s16le_planar, "PCM 16-bit little-endian planar");
539 PCM_CODEC (PCM_S24BE, AV_SAMPLE_FMT_S32, pcm_s24be, "PCM signed 24-bit big-endian");
540 PCM_CODEC (PCM_S24DAUD, AV_SAMPLE_FMT_S16, pcm_s24daud, "PCM D-Cinema audio signed 24-bit");
541 PCM_CODEC (PCM_S24LE, AV_SAMPLE_FMT_S32, pcm_s24le, "PCM signed 24-bit little-endian");
542 PCM_CODEC (PCM_S32BE, AV_SAMPLE_FMT_S32, pcm_s32be, "PCM signed 32-bit big-endian");
543 PCM_CODEC (PCM_S32LE, AV_SAMPLE_FMT_S32, pcm_s32le, "PCM signed 32-bit little-endian");
544 PCM_CODEC (PCM_U8, AV_SAMPLE_FMT_U8, pcm_u8, "PCM unsigned 8-bit");
545 PCM_CODEC (PCM_U16BE, AV_SAMPLE_FMT_S16, pcm_u16be, "PCM unsigned 16-bit big-endian");
546 PCM_CODEC (PCM_U16LE, AV_SAMPLE_FMT_S16, pcm_u16le, "PCM unsigned 16-bit little-endian");
547 PCM_CODEC (PCM_U24BE, AV_SAMPLE_FMT_S32, pcm_u24be, "PCM unsigned 24-bit big-endian");
548 PCM_CODEC (PCM_U24LE, AV_SAMPLE_FMT_S32, pcm_u24le, "PCM unsigned 24-bit little-endian");
549 PCM_CODEC (PCM_U32BE, AV_SAMPLE_FMT_S32, pcm_u32be, "PCM unsigned 32-bit big-endian");
550 PCM_CODEC (PCM_U32LE, AV_SAMPLE_FMT_S32, pcm_u32le, "PCM unsigned 32-bit little-endian");
551 PCM_DECODER(PCM_ZORK, AV_SAMPLE_FMT_U8, pcm_zork, "PCM Zork");