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 #define DECODE_PLANAR(size, endian, src, dst, n, shift, offset) { \
257 n /= avctx->channels; \
258 for (c = 0; c < avctx->channels; c++) { \
259 dst = s->frame.extended_data[c]; \
260 for (i = n; i > 0; i--) { \
261 uint ## size ## _t v = bytestream_get_ ## endian(&src); \
262 AV_WN ## size ## A(dst, (v - offset) << shift); \
268 static int pcm_decode_frame(AVCodecContext *avctx, void *data,
269 int *got_frame_ptr, AVPacket *avpkt)
271 const uint8_t *src = avpkt->data;
272 int buf_size = avpkt->size;
273 PCMDecode *s = avctx->priv_data;
274 int sample_size, c, n, ret, samples_per_block;
276 int32_t *dst_int32_t;
278 sample_size = av_get_bits_per_sample(avctx->codec_id) / 8;
280 /* av_get_bits_per_sample returns 0 for AV_CODEC_ID_PCM_DVD */
281 samples_per_block = 1;
282 if (AV_CODEC_ID_PCM_DVD == avctx->codec_id) {
283 if (avctx->bits_per_coded_sample != 20 &&
284 avctx->bits_per_coded_sample != 24) {
285 av_log(avctx, AV_LOG_ERROR,
286 "PCM DVD unsupported sample depth %i\n",
287 avctx->bits_per_coded_sample);
288 return AVERROR(EINVAL);
290 /* 2 samples are interleaved per block in PCM_DVD */
291 samples_per_block = 2;
292 sample_size = avctx->bits_per_coded_sample * 2 / 8;
293 } else if (avctx->codec_id == AV_CODEC_ID_PCM_LXF) {
294 /* we process 40-bit blocks per channel for LXF */
295 samples_per_block = 2;
299 if (sample_size == 0) {
300 av_log(avctx, AV_LOG_ERROR, "Invalid sample_size\n");
301 return AVERROR(EINVAL);
304 if (avctx->channels == 0) {
305 av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n");
306 return AVERROR(EINVAL);
309 n = avctx->channels * sample_size;
311 if (n && buf_size % n) {
313 av_log(avctx, AV_LOG_ERROR,
314 "Invalid PCM packet, data has size %d but at least a size of %d was expected\n",
316 return AVERROR_INVALIDDATA;
318 buf_size -= buf_size % n;
321 n = buf_size / sample_size;
323 /* get output buffer */
324 s->frame.nb_samples = n * samples_per_block / avctx->channels;
325 if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {
326 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
329 samples = s->frame.data[0];
331 switch (avctx->codec_id) {
332 case AV_CODEC_ID_PCM_U32LE:
333 DECODE(32, le32, src, samples, n, 0, 0x80000000)
335 case AV_CODEC_ID_PCM_U32BE:
336 DECODE(32, be32, src, samples, n, 0, 0x80000000)
338 case AV_CODEC_ID_PCM_S24LE:
339 DECODE(32, le24, src, samples, n, 8, 0)
341 case AV_CODEC_ID_PCM_S24BE:
342 DECODE(32, be24, src, samples, n, 8, 0)
344 case AV_CODEC_ID_PCM_U24LE:
345 DECODE(32, le24, src, samples, n, 8, 0x800000)
347 case AV_CODEC_ID_PCM_U24BE:
348 DECODE(32, be24, src, samples, n, 8, 0x800000)
350 case AV_CODEC_ID_PCM_S24DAUD:
352 uint32_t v = bytestream_get_be24(&src);
353 v >>= 4; // sync flags are here
354 AV_WN16A(samples, ff_reverse[(v >> 8) & 0xff] +
355 (ff_reverse[v & 0xff] << 8));
359 case AV_CODEC_ID_PCM_S16LE_PLANAR:
360 DECODE_PLANAR(16, le16, src, samples, n, 0, 0);
362 case AV_CODEC_ID_PCM_S24LE_PLANAR:
363 DECODE_PLANAR(32, le24, src, samples, n, 8, 0);
365 case AV_CODEC_ID_PCM_S32LE_PLANAR:
366 DECODE_PLANAR(32, le32, src, samples, n, 0, 0);
368 case AV_CODEC_ID_PCM_U16LE:
369 DECODE(16, le16, src, samples, n, 0, 0x8000)
371 case AV_CODEC_ID_PCM_U16BE:
372 DECODE(16, be16, src, samples, n, 0, 0x8000)
374 case AV_CODEC_ID_PCM_S8:
376 *samples++ = *src++ + 128;
379 case AV_CODEC_ID_PCM_F64LE:
380 DECODE(64, le64, src, samples, n, 0, 0)
382 case AV_CODEC_ID_PCM_S32LE:
383 case AV_CODEC_ID_PCM_F32LE:
384 DECODE(32, le32, src, samples, n, 0, 0)
386 case AV_CODEC_ID_PCM_S16LE:
387 DECODE(16, le16, src, samples, n, 0, 0)
389 case AV_CODEC_ID_PCM_F64BE:
390 case AV_CODEC_ID_PCM_F32BE:
391 case AV_CODEC_ID_PCM_S32BE:
392 case AV_CODEC_ID_PCM_S16BE:
394 case AV_CODEC_ID_PCM_F64BE:
395 DECODE(64, be64, src, samples, n, 0, 0)
397 case AV_CODEC_ID_PCM_F32BE:
398 case AV_CODEC_ID_PCM_S32BE:
399 DECODE(32, be32, src, samples, n, 0, 0)
401 case AV_CODEC_ID_PCM_S16BE:
402 DECODE(16, be16, src, samples, n, 0, 0)
404 case AV_CODEC_ID_PCM_F64LE:
405 case AV_CODEC_ID_PCM_F32LE:
406 case AV_CODEC_ID_PCM_S32LE:
407 case AV_CODEC_ID_PCM_S16LE:
408 #endif /* HAVE_BIGENDIAN */
409 case AV_CODEC_ID_PCM_U8:
410 memcpy(samples, src, n * sample_size);
412 case AV_CODEC_ID_PCM_ZORK:
420 case AV_CODEC_ID_PCM_ALAW:
421 case AV_CODEC_ID_PCM_MULAW:
423 AV_WN16A(samples, s->table[*src++]);
427 case AV_CODEC_ID_PCM_DVD:
430 dst_int32_t = (int32_t *)s->frame.data[0];
431 n /= avctx->channels;
432 switch (avctx->bits_per_coded_sample) {
438 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8 & 0xf0) << 8);
439 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++ & 0x0f) << 12);
449 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);
450 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);
458 case AV_CODEC_ID_PCM_LXF:
461 n /= avctx->channels;
462 for (c = 0; c < avctx->channels; c++) {
463 dst_int32_t = (int32_t *)s->frame.extended_data[c];
464 for (i = 0; i < n; i++) {
465 // extract low 20 bits and expand to 32 bits
466 *dst_int32_t++ = (src[2] << 28) |
469 ((src[2] & 0x0F) << 8) |
471 // extract high 20 bits and expand to 32 bits
472 *dst_int32_t++ = (src[4] << 24) |
474 ((src[2] & 0xF0) << 8) |
487 *(AVFrame *)data = s->frame;
492 #define PCM_ENCODER_0(id_, sample_fmt_, name_, long_name_)
493 #define PCM_ENCODER_1(id_, sample_fmt_, name_, long_name_) \
494 AVCodec ff_ ## name_ ## _encoder = { \
496 .type = AVMEDIA_TYPE_AUDIO, \
497 .id = AV_CODEC_ID_ ## id_, \
498 .init = pcm_encode_init, \
499 .encode2 = pcm_encode_frame, \
500 .close = pcm_encode_close, \
501 .capabilities = CODEC_CAP_VARIABLE_FRAME_SIZE, \
502 .sample_fmts = (const enum AVSampleFormat[]){ sample_fmt_, \
503 AV_SAMPLE_FMT_NONE }, \
504 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
507 #define PCM_ENCODER_2(cf, id, sample_fmt, name, long_name) \
508 PCM_ENCODER_ ## cf(id, sample_fmt, name, long_name)
509 #define PCM_ENCODER_3(cf, id, sample_fmt, name, long_name) \
510 PCM_ENCODER_2(cf, id, sample_fmt, name, long_name)
511 #define PCM_ENCODER(id, sample_fmt, name, long_name) \
512 PCM_ENCODER_3(CONFIG_ ## id ## _ENCODER, id, sample_fmt, name, long_name)
514 #define PCM_DECODER_0(id, sample_fmt, name, long_name)
515 #define PCM_DECODER_1(id_, sample_fmt_, name_, long_name_) \
516 AVCodec ff_ ## name_ ## _decoder = { \
518 .type = AVMEDIA_TYPE_AUDIO, \
519 .id = AV_CODEC_ID_ ## id_, \
520 .priv_data_size = sizeof(PCMDecode), \
521 .init = pcm_decode_init, \
522 .decode = pcm_decode_frame, \
523 .capabilities = CODEC_CAP_DR1, \
524 .sample_fmts = (const enum AVSampleFormat[]){ sample_fmt_, \
525 AV_SAMPLE_FMT_NONE }, \
526 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
529 #define PCM_DECODER_2(cf, id, sample_fmt, name, long_name) \
530 PCM_DECODER_ ## cf(id, sample_fmt, name, long_name)
531 #define PCM_DECODER_3(cf, id, sample_fmt, name, long_name) \
532 PCM_DECODER_2(cf, id, sample_fmt, name, long_name)
533 #define PCM_DECODER(id, sample_fmt, name, long_name) \
534 PCM_DECODER_3(CONFIG_ ## id ## _DECODER, id, sample_fmt, name, long_name)
536 #define PCM_CODEC(id, sample_fmt_, name, long_name_) \
537 PCM_ENCODER(id, sample_fmt_, name, long_name_); \
538 PCM_DECODER(id, sample_fmt_, name, long_name_)
540 /* Note: Do not forget to add new entries to the Makefile as well. */
541 PCM_CODEC (PCM_ALAW, AV_SAMPLE_FMT_S16, pcm_alaw, "PCM A-law / G.711 A-law");
542 PCM_DECODER(PCM_DVD, AV_SAMPLE_FMT_S32, pcm_dvd, "PCM signed 20|24-bit big-endian");
543 PCM_CODEC (PCM_F32BE, AV_SAMPLE_FMT_FLT, pcm_f32be, "PCM 32-bit floating point big-endian");
544 PCM_CODEC (PCM_F32LE, AV_SAMPLE_FMT_FLT, pcm_f32le, "PCM 32-bit floating point little-endian");
545 PCM_CODEC (PCM_F64BE, AV_SAMPLE_FMT_DBL, pcm_f64be, "PCM 64-bit floating point big-endian");
546 PCM_CODEC (PCM_F64LE, AV_SAMPLE_FMT_DBL, pcm_f64le, "PCM 64-bit floating point little-endian");
547 PCM_DECODER(PCM_LXF, AV_SAMPLE_FMT_S32P,pcm_lxf, "PCM signed 20-bit little-endian planar");
548 PCM_CODEC (PCM_MULAW, AV_SAMPLE_FMT_S16, pcm_mulaw, "PCM mu-law / G.711 mu-law");
549 PCM_CODEC (PCM_S8, AV_SAMPLE_FMT_U8, pcm_s8, "PCM signed 8-bit");
550 PCM_CODEC (PCM_S16BE, AV_SAMPLE_FMT_S16, pcm_s16be, "PCM signed 16-bit big-endian");
551 PCM_CODEC (PCM_S16LE, AV_SAMPLE_FMT_S16, pcm_s16le, "PCM signed 16-bit little-endian");
552 PCM_DECODER(PCM_S16LE_PLANAR, AV_SAMPLE_FMT_S16P,pcm_s16le_planar, "PCM signed 16-bit little-endian planar");
553 PCM_CODEC (PCM_S24BE, AV_SAMPLE_FMT_S32, pcm_s24be, "PCM signed 24-bit big-endian");
554 PCM_CODEC (PCM_S24DAUD, AV_SAMPLE_FMT_S16, pcm_s24daud, "PCM D-Cinema audio signed 24-bit");
555 PCM_CODEC (PCM_S24LE, AV_SAMPLE_FMT_S32, pcm_s24le, "PCM signed 24-bit little-endian");
556 PCM_DECODER(PCM_S24LE_PLANAR, AV_SAMPLE_FMT_S32P,pcm_s24le_planar, "PCM signed 24-bit little-endian planar");
557 PCM_CODEC (PCM_S32BE, AV_SAMPLE_FMT_S32, pcm_s32be, "PCM signed 32-bit big-endian");
558 PCM_CODEC (PCM_S32LE, AV_SAMPLE_FMT_S32, pcm_s32le, "PCM signed 32-bit little-endian");
559 PCM_DECODER(PCM_S32LE_PLANAR, AV_SAMPLE_FMT_S32P,pcm_s32le_planar, "PCM signed 32-bit little-endian planar");
560 PCM_CODEC (PCM_U8, AV_SAMPLE_FMT_U8, pcm_u8, "PCM unsigned 8-bit");
561 PCM_CODEC (PCM_U16BE, AV_SAMPLE_FMT_S16, pcm_u16be, "PCM unsigned 16-bit big-endian");
562 PCM_CODEC (PCM_U16LE, AV_SAMPLE_FMT_S16, pcm_u16le, "PCM unsigned 16-bit little-endian");
563 PCM_CODEC (PCM_U24BE, AV_SAMPLE_FMT_S32, pcm_u24be, "PCM unsigned 24-bit big-endian");
564 PCM_CODEC (PCM_U24LE, AV_SAMPLE_FMT_S32, pcm_u24le, "PCM unsigned 24-bit little-endian");
565 PCM_CODEC (PCM_U32BE, AV_SAMPLE_FMT_S32, pcm_u32be, "PCM unsigned 32-bit big-endian");
566 PCM_CODEC (PCM_U32LE, AV_SAMPLE_FMT_S32, pcm_u32le, "PCM unsigned 32-bit little-endian");
567 PCM_DECODER(PCM_ZORK, AV_SAMPLE_FMT_U8, pcm_zork, "PCM Zork");