3 * Copyright (c) 2001 Fabrice Bellard
5 * This file is part of Libav.
7 * Libav 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 * Libav 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 Libav; 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;
56 * Write PCM samples macro
57 * @param type Datatype of native machine format
58 * @param endian bytestream_put_xxx() suffix
59 * @param src Source pointer (variable name)
60 * @param dst Destination pointer (variable name)
61 * @param n Total number of samples (variable name)
62 * @param shift Bitshift (bits)
63 * @param offset Sample value offset
65 #define ENCODE(type, endian, src, dst, n, shift, offset) \
66 samples_ ## type = (const type *) src; \
67 for (; n > 0; n--) { \
68 register type v = (*samples_ ## type++ >> shift) + offset; \
69 bytestream_put_ ## endian(&dst, v); \
72 static int pcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
73 const AVFrame *frame, int *got_packet_ptr)
75 int n, sample_size, v, ret;
79 const int16_t *samples_int16_t;
80 const int32_t *samples_int32_t;
81 const int64_t *samples_int64_t;
82 const uint16_t *samples_uint16_t;
83 const uint32_t *samples_uint32_t;
85 sample_size = av_get_bits_per_sample(avctx->codec->id) / 8;
86 n = frame->nb_samples * avctx->channels;
87 samples = (const short *)frame->data[0];
89 if ((ret = ff_alloc_packet(avpkt, n * sample_size))) {
90 av_log(avctx, AV_LOG_ERROR, "Error getting output packet\n");
95 switch (avctx->codec->id) {
96 case AV_CODEC_ID_PCM_U32LE:
97 ENCODE(uint32_t, le32, samples, dst, n, 0, 0x80000000)
99 case AV_CODEC_ID_PCM_U32BE:
100 ENCODE(uint32_t, be32, samples, dst, n, 0, 0x80000000)
102 case AV_CODEC_ID_PCM_S24LE:
103 ENCODE(int32_t, le24, samples, dst, n, 8, 0)
105 case AV_CODEC_ID_PCM_S24BE:
106 ENCODE(int32_t, be24, samples, dst, n, 8, 0)
108 case AV_CODEC_ID_PCM_U24LE:
109 ENCODE(uint32_t, le24, samples, dst, n, 8, 0x800000)
111 case AV_CODEC_ID_PCM_U24BE:
112 ENCODE(uint32_t, be24, samples, dst, n, 8, 0x800000)
114 case AV_CODEC_ID_PCM_S24DAUD:
116 uint32_t tmp = ff_reverse[(*samples >> 8) & 0xff] +
117 (ff_reverse[*samples & 0xff] << 8);
118 tmp <<= 4; // sync flags would go here
119 bytestream_put_be24(&dst, tmp);
123 case AV_CODEC_ID_PCM_U16LE:
124 ENCODE(uint16_t, le16, samples, dst, n, 0, 0x8000)
126 case AV_CODEC_ID_PCM_U16BE:
127 ENCODE(uint16_t, be16, samples, dst, n, 0, 0x8000)
129 case AV_CODEC_ID_PCM_S8:
130 srcu8 = frame->data[0];
137 case AV_CODEC_ID_PCM_F64LE:
138 ENCODE(int64_t, le64, samples, dst, n, 0, 0)
140 case AV_CODEC_ID_PCM_S32LE:
141 case AV_CODEC_ID_PCM_F32LE:
142 ENCODE(int32_t, le32, samples, dst, n, 0, 0)
144 case AV_CODEC_ID_PCM_S16LE:
145 ENCODE(int16_t, le16, samples, dst, n, 0, 0)
147 case AV_CODEC_ID_PCM_F64BE:
148 case AV_CODEC_ID_PCM_F32BE:
149 case AV_CODEC_ID_PCM_S32BE:
150 case AV_CODEC_ID_PCM_S16BE:
152 case AV_CODEC_ID_PCM_F64BE:
153 ENCODE(int64_t, be64, samples, dst, n, 0, 0)
155 case AV_CODEC_ID_PCM_F32BE:
156 case AV_CODEC_ID_PCM_S32BE:
157 ENCODE(int32_t, be32, samples, dst, n, 0, 0)
159 case AV_CODEC_ID_PCM_S16BE:
160 ENCODE(int16_t, be16, samples, dst, n, 0, 0)
162 case AV_CODEC_ID_PCM_F64LE:
163 case AV_CODEC_ID_PCM_F32LE:
164 case AV_CODEC_ID_PCM_S32LE:
165 case AV_CODEC_ID_PCM_S16LE:
166 #endif /* HAVE_BIGENDIAN */
167 case AV_CODEC_ID_PCM_U8:
168 memcpy(dst, samples, n * sample_size);
169 dst += n * sample_size;
171 case AV_CODEC_ID_PCM_ALAW:
174 *dst++ = linear_to_alaw[(v + 32768) >> 2];
177 case AV_CODEC_ID_PCM_MULAW:
180 *dst++ = linear_to_ulaw[(v + 32768) >> 2];
191 typedef struct PCMDecode {
195 static av_cold int pcm_decode_init(AVCodecContext *avctx)
197 PCMDecode *s = avctx->priv_data;
200 if (avctx->channels <= 0) {
201 av_log(avctx, AV_LOG_ERROR, "PCM channels out of bounds\n");
202 return AVERROR(EINVAL);
205 switch (avctx->codec->id) {
206 case AV_CODEC_ID_PCM_ALAW:
207 for (i = 0; i < 256; i++)
208 s->table[i] = alaw2linear(i);
210 case AV_CODEC_ID_PCM_MULAW:
211 for (i = 0; i < 256; i++)
212 s->table[i] = ulaw2linear(i);
218 avctx->sample_fmt = avctx->codec->sample_fmts[0];
220 if (avctx->sample_fmt == AV_SAMPLE_FMT_S32)
221 avctx->bits_per_raw_sample = av_get_bits_per_sample(avctx->codec->id);
227 * Read PCM samples macro
228 * @param size Data size of native machine format
229 * @param endian bytestream_get_xxx() endian suffix
230 * @param src Source pointer (variable name)
231 * @param dst Destination pointer (variable name)
232 * @param n Total number of samples (variable name)
233 * @param shift Bitshift (bits)
234 * @param offset Sample value offset
236 #define DECODE(size, endian, src, dst, n, shift, offset) \
237 for (; n > 0; n--) { \
238 uint ## size ## _t v = bytestream_get_ ## endian(&src); \
239 AV_WN ## size ## A(dst, (v - offset) << shift); \
244 #define DECODE_PLANAR(size, endian, src, dst, n, shift, offset) \
247 n /= avctx->channels; \
248 for (c = 0; c < avctx->channels; c++) { \
249 samples = frame->extended_data[c]; \
251 DECODE(size, endian, src, samples, n2, 0, 0) \
255 #define DECODE_PLANAR(size, endian, src, dst, n, shift, offset) \
257 n /= avctx->channels; \
258 for (c = 0; c < avctx->channels; c++) { \
259 samples = frame->extended_data[c]; \
260 memcpy(samples, src, n * size / 8); \
261 src += n * size / 8; \
264 #endif /* HAVE_BIGENDIAN */
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 AVFrame *frame = data;
273 int sample_size, c, n, ret, samples_per_block;
275 int32_t *dst_int32_t;
277 sample_size = av_get_bits_per_sample(avctx->codec_id) / 8;
279 /* av_get_bits_per_sample returns 0 for AV_CODEC_ID_PCM_DVD */
280 samples_per_block = 1;
281 if (avctx->codec_id == AV_CODEC_ID_PCM_LXF) {
282 /* we process 40-bit blocks per channel for LXF */
283 samples_per_block = 2;
287 if (sample_size == 0) {
288 av_log(avctx, AV_LOG_ERROR, "Invalid sample_size\n");
289 return AVERROR(EINVAL);
292 n = avctx->channels * sample_size;
294 if (n && buf_size % n) {
296 av_log(avctx, AV_LOG_ERROR, "invalid PCM packet\n");
299 buf_size -= buf_size % n;
302 n = buf_size / sample_size;
304 /* get output buffer */
305 frame->nb_samples = n * samples_per_block / avctx->channels;
306 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
307 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
310 samples = frame->data[0];
312 switch (avctx->codec->id) {
313 case AV_CODEC_ID_PCM_U32LE:
314 DECODE(32, le32, src, samples, n, 0, 0x80000000)
316 case AV_CODEC_ID_PCM_U32BE:
317 DECODE(32, be32, src, samples, n, 0, 0x80000000)
319 case AV_CODEC_ID_PCM_S24LE:
320 DECODE(32, le24, src, samples, n, 8, 0)
322 case AV_CODEC_ID_PCM_S24BE:
323 DECODE(32, be24, src, samples, n, 8, 0)
325 case AV_CODEC_ID_PCM_U24LE:
326 DECODE(32, le24, src, samples, n, 8, 0x800000)
328 case AV_CODEC_ID_PCM_U24BE:
329 DECODE(32, be24, src, samples, n, 8, 0x800000)
331 case AV_CODEC_ID_PCM_S24DAUD:
333 uint32_t v = bytestream_get_be24(&src);
334 v >>= 4; // sync flags are here
335 AV_WN16A(samples, ff_reverse[(v >> 8) & 0xff] +
336 (ff_reverse[v & 0xff] << 8));
340 case AV_CODEC_ID_PCM_S16BE_PLANAR:
341 DECODE_PLANAR(16, be16, src, samples, n, 0, 0);
343 case AV_CODEC_ID_PCM_S16LE_PLANAR:
344 DECODE_PLANAR(16, le16, src, samples, n, 0, 0);
346 case AV_CODEC_ID_PCM_S24LE_PLANAR:
347 DECODE_PLANAR(32, le24, src, samples, n, 8, 0);
349 case AV_CODEC_ID_PCM_S32LE_PLANAR:
350 DECODE_PLANAR(32, le32, src, samples, n, 0, 0);
352 case AV_CODEC_ID_PCM_U16LE:
353 DECODE(16, le16, src, samples, n, 0, 0x8000)
355 case AV_CODEC_ID_PCM_U16BE:
356 DECODE(16, be16, src, samples, n, 0, 0x8000)
358 case AV_CODEC_ID_PCM_S8:
360 *samples++ = *src++ + 128;
363 case AV_CODEC_ID_PCM_F64LE:
364 DECODE(64, le64, src, samples, n, 0, 0)
366 case AV_CODEC_ID_PCM_S32LE:
367 case AV_CODEC_ID_PCM_F32LE:
368 DECODE(32, le32, src, samples, n, 0, 0)
370 case AV_CODEC_ID_PCM_S16LE:
371 DECODE(16, le16, src, samples, n, 0, 0)
373 case AV_CODEC_ID_PCM_F64BE:
374 case AV_CODEC_ID_PCM_F32BE:
375 case AV_CODEC_ID_PCM_S32BE:
376 case AV_CODEC_ID_PCM_S16BE:
378 case AV_CODEC_ID_PCM_F64BE:
379 DECODE(64, be64, src, samples, n, 0, 0)
381 case AV_CODEC_ID_PCM_F32BE:
382 case AV_CODEC_ID_PCM_S32BE:
383 DECODE(32, be32, src, samples, n, 0, 0)
385 case AV_CODEC_ID_PCM_S16BE:
386 DECODE(16, be16, src, samples, n, 0, 0)
388 case AV_CODEC_ID_PCM_F64LE:
389 case AV_CODEC_ID_PCM_F32LE:
390 case AV_CODEC_ID_PCM_S32LE:
391 case AV_CODEC_ID_PCM_S16LE:
392 #endif /* HAVE_BIGENDIAN */
393 case AV_CODEC_ID_PCM_U8:
394 memcpy(samples, src, n * sample_size);
396 case AV_CODEC_ID_PCM_ZORK:
404 case AV_CODEC_ID_PCM_ALAW:
405 case AV_CODEC_ID_PCM_MULAW:
407 AV_WN16A(samples, s->table[*src++]);
411 case AV_CODEC_ID_PCM_LXF:
414 n /= avctx->channels;
415 for (c = 0; c < avctx->channels; c++) {
416 dst_int32_t = (int32_t *)frame->extended_data[c];
417 for (i = 0; i < n; i++) {
418 // extract low 20 bits and expand to 32 bits
419 *dst_int32_t++ = (src[2] << 28) |
422 ((src[2] & 0x0F) << 8) |
424 // extract high 20 bits and expand to 32 bits
425 *dst_int32_t++ = (src[4] << 24) |
427 ((src[2] & 0xF0) << 8) |
444 #define PCM_ENCODER_0(id_, sample_fmt_, name_, long_name_)
445 #define PCM_ENCODER_1(id_, sample_fmt_, name_, long_name_) \
446 AVCodec ff_ ## name_ ## _encoder = { \
448 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
449 .type = AVMEDIA_TYPE_AUDIO, \
450 .id = AV_CODEC_ID_ ## id_, \
451 .init = pcm_encode_init, \
452 .encode2 = pcm_encode_frame, \
453 .capabilities = AV_CODEC_CAP_VARIABLE_FRAME_SIZE, \
454 .sample_fmts = (const enum AVSampleFormat[]){ sample_fmt_, \
455 AV_SAMPLE_FMT_NONE }, \
458 #define PCM_ENCODER_2(cf, id, sample_fmt, name, long_name) \
459 PCM_ENCODER_ ## cf(id, sample_fmt, name, long_name)
460 #define PCM_ENCODER_3(cf, id, sample_fmt, name, long_name) \
461 PCM_ENCODER_2(cf, id, sample_fmt, name, long_name)
462 #define PCM_ENCODER(id, sample_fmt, name, long_name) \
463 PCM_ENCODER_3(CONFIG_ ## id ## _ENCODER, id, sample_fmt, name, long_name)
465 #define PCM_DECODER_0(id, sample_fmt, name, long_name)
466 #define PCM_DECODER_1(id_, sample_fmt_, name_, long_name_) \
467 AVCodec ff_ ## name_ ## _decoder = { \
469 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
470 .type = AVMEDIA_TYPE_AUDIO, \
471 .id = AV_CODEC_ID_ ## id_, \
472 .priv_data_size = sizeof(PCMDecode), \
473 .init = pcm_decode_init, \
474 .decode = pcm_decode_frame, \
475 .capabilities = AV_CODEC_CAP_DR1, \
476 .sample_fmts = (const enum AVSampleFormat[]){ sample_fmt_, \
477 AV_SAMPLE_FMT_NONE }, \
480 #define PCM_DECODER_2(cf, id, sample_fmt, name, long_name) \
481 PCM_DECODER_ ## cf(id, sample_fmt, name, long_name)
482 #define PCM_DECODER_3(cf, id, sample_fmt, name, long_name) \
483 PCM_DECODER_2(cf, id, sample_fmt, name, long_name)
484 #define PCM_DECODER(id, sample_fmt, name, long_name) \
485 PCM_DECODER_3(CONFIG_ ## id ## _DECODER, id, sample_fmt, name, long_name)
487 #define PCM_CODEC(id, sample_fmt_, name, long_name_) \
488 PCM_ENCODER(id, sample_fmt_, name, long_name_); \
489 PCM_DECODER(id, sample_fmt_, name, long_name_)
491 /* Note: Do not forget to add new entries to the Makefile as well. */
492 PCM_CODEC (PCM_ALAW, AV_SAMPLE_FMT_S16, pcm_alaw, "PCM A-law");
493 PCM_CODEC (PCM_F32BE, AV_SAMPLE_FMT_FLT, pcm_f32be, "PCM 32-bit floating point big-endian");
494 PCM_CODEC (PCM_F32LE, AV_SAMPLE_FMT_FLT, pcm_f32le, "PCM 32-bit floating point little-endian");
495 PCM_CODEC (PCM_F64BE, AV_SAMPLE_FMT_DBL, pcm_f64be, "PCM 64-bit floating point big-endian");
496 PCM_CODEC (PCM_F64LE, AV_SAMPLE_FMT_DBL, pcm_f64le, "PCM 64-bit floating point little-endian");
497 PCM_DECODER(PCM_LXF, AV_SAMPLE_FMT_S32P, pcm_lxf, "PCM signed 20-bit little-endian planar");
498 PCM_CODEC (PCM_MULAW, AV_SAMPLE_FMT_S16, pcm_mulaw, "PCM mu-law");
499 PCM_CODEC (PCM_S8, AV_SAMPLE_FMT_U8, pcm_s8, "PCM signed 8-bit");
500 PCM_CODEC (PCM_S16BE, AV_SAMPLE_FMT_S16, pcm_s16be, "PCM signed 16-bit big-endian");
501 PCM_DECODER(PCM_S16BE_PLANAR, AV_SAMPLE_FMT_S16P,pcm_s16be_planar, "PCM signed 16-bit big-endian planar");
502 PCM_CODEC (PCM_S16LE, AV_SAMPLE_FMT_S16, pcm_s16le, "PCM signed 16-bit little-endian");
503 PCM_DECODER(PCM_S16LE_PLANAR, AV_SAMPLE_FMT_S16P, pcm_s16le_planar, "PCM 16-bit little-endian planar");
504 PCM_CODEC (PCM_S24BE, AV_SAMPLE_FMT_S32, pcm_s24be, "PCM signed 24-bit big-endian");
505 PCM_CODEC (PCM_S24DAUD, AV_SAMPLE_FMT_S16, pcm_s24daud, "PCM D-Cinema audio signed 24-bit");
506 PCM_CODEC (PCM_S24LE, AV_SAMPLE_FMT_S32, pcm_s24le, "PCM signed 24-bit little-endian");
507 PCM_DECODER(PCM_S24LE_PLANAR, AV_SAMPLE_FMT_S32P,pcm_s24le_planar, "PCM signed 24-bit little-endian planar");
508 PCM_CODEC (PCM_S32BE, AV_SAMPLE_FMT_S32, pcm_s32be, "PCM signed 32-bit big-endian");
509 PCM_CODEC (PCM_S32LE, AV_SAMPLE_FMT_S32, pcm_s32le, "PCM signed 32-bit little-endian");
510 PCM_DECODER(PCM_S32LE_PLANAR, AV_SAMPLE_FMT_S32P,pcm_s32le_planar, "PCM signed 32-bit little-endian planar");
511 PCM_CODEC (PCM_U8, AV_SAMPLE_FMT_U8, pcm_u8, "PCM unsigned 8-bit");
512 PCM_CODEC (PCM_U16BE, AV_SAMPLE_FMT_S16, pcm_u16be, "PCM unsigned 16-bit big-endian");
513 PCM_CODEC (PCM_U16LE, AV_SAMPLE_FMT_S16, pcm_u16le, "PCM unsigned 16-bit little-endian");
514 PCM_CODEC (PCM_U24BE, AV_SAMPLE_FMT_S32, pcm_u24be, "PCM unsigned 24-bit big-endian");
515 PCM_CODEC (PCM_U24LE, AV_SAMPLE_FMT_S32, pcm_u24le, "PCM unsigned 24-bit little-endian");
516 PCM_CODEC (PCM_U32BE, AV_SAMPLE_FMT_S32, pcm_u32be, "PCM unsigned 32-bit big-endian");
517 PCM_CODEC (PCM_U32LE, AV_SAMPLE_FMT_S32, pcm_u32le, "PCM unsigned 32-bit little-endian");
518 PCM_DECODER(PCM_ZORK, AV_SAMPLE_FMT_U8, pcm_zork, "PCM Zork");