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 #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_packet(avpkt, n * sample_size))) {
102 av_log(avctx, AV_LOG_ERROR, "Error getting output packet\n");
107 switch (avctx->codec->id) {
108 case AV_CODEC_ID_PCM_U32LE:
109 ENCODE(uint32_t, le32, samples, dst, n, 0, 0x80000000)
111 case AV_CODEC_ID_PCM_U32BE:
112 ENCODE(uint32_t, be32, samples, dst, n, 0, 0x80000000)
114 case AV_CODEC_ID_PCM_S24LE:
115 ENCODE(int32_t, le24, samples, dst, n, 8, 0)
117 case AV_CODEC_ID_PCM_S24BE:
118 ENCODE(int32_t, be24, samples, dst, n, 8, 0)
120 case AV_CODEC_ID_PCM_U24LE:
121 ENCODE(uint32_t, le24, samples, dst, n, 8, 0x800000)
123 case AV_CODEC_ID_PCM_U24BE:
124 ENCODE(uint32_t, be24, samples, dst, n, 8, 0x800000)
126 case AV_CODEC_ID_PCM_S24DAUD:
128 uint32_t tmp = ff_reverse[(*samples >> 8) & 0xff] +
129 (ff_reverse[*samples & 0xff] << 8);
130 tmp <<= 4; // sync flags would go here
131 bytestream_put_be24(&dst, tmp);
135 case AV_CODEC_ID_PCM_U16LE:
136 ENCODE(uint16_t, le16, samples, dst, n, 0, 0x8000)
138 case AV_CODEC_ID_PCM_U16BE:
139 ENCODE(uint16_t, be16, samples, dst, n, 0, 0x8000)
141 case AV_CODEC_ID_PCM_S8:
142 srcu8 = frame->data[0];
149 case AV_CODEC_ID_PCM_F64LE:
150 ENCODE(int64_t, le64, samples, dst, n, 0, 0)
152 case AV_CODEC_ID_PCM_S32LE:
153 case AV_CODEC_ID_PCM_F32LE:
154 ENCODE(int32_t, le32, samples, dst, n, 0, 0)
156 case AV_CODEC_ID_PCM_S16LE:
157 ENCODE(int16_t, le16, samples, dst, n, 0, 0)
159 case AV_CODEC_ID_PCM_F64BE:
160 case AV_CODEC_ID_PCM_F32BE:
161 case AV_CODEC_ID_PCM_S32BE:
162 case AV_CODEC_ID_PCM_S16BE:
164 case AV_CODEC_ID_PCM_F64BE:
165 ENCODE(int64_t, be64, samples, dst, n, 0, 0)
167 case AV_CODEC_ID_PCM_F32BE:
168 case AV_CODEC_ID_PCM_S32BE:
169 ENCODE(int32_t, be32, samples, dst, n, 0, 0)
171 case AV_CODEC_ID_PCM_S16BE:
172 ENCODE(int16_t, be16, samples, dst, n, 0, 0)
174 case AV_CODEC_ID_PCM_F64LE:
175 case AV_CODEC_ID_PCM_F32LE:
176 case AV_CODEC_ID_PCM_S32LE:
177 case AV_CODEC_ID_PCM_S16LE:
178 #endif /* HAVE_BIGENDIAN */
179 case AV_CODEC_ID_PCM_U8:
180 memcpy(dst, samples, n * sample_size);
181 dst += n * sample_size;
183 case AV_CODEC_ID_PCM_ALAW:
186 *dst++ = linear_to_alaw[(v + 32768) >> 2];
189 case AV_CODEC_ID_PCM_MULAW:
192 *dst++ = linear_to_ulaw[(v + 32768) >> 2];
203 typedef struct PCMDecode {
208 static av_cold int pcm_decode_init(AVCodecContext *avctx)
210 PCMDecode *s = avctx->priv_data;
213 if (avctx->channels <= 0 || avctx->channels > MAX_CHANNELS) {
214 av_log(avctx, AV_LOG_ERROR, "PCM channels out of bounds\n");
215 return AVERROR(EINVAL);
218 switch (avctx->codec->id) {
219 case AV_CODEC_ID_PCM_ALAW:
220 for (i = 0; i < 256; i++)
221 s->table[i] = alaw2linear(i);
223 case AV_CODEC_ID_PCM_MULAW:
224 for (i = 0; i < 256; i++)
225 s->table[i] = ulaw2linear(i);
231 avctx->sample_fmt = avctx->codec->sample_fmts[0];
233 if (avctx->sample_fmt == AV_SAMPLE_FMT_S32)
234 avctx->bits_per_raw_sample = av_get_bits_per_sample(avctx->codec->id);
236 avcodec_get_frame_defaults(&s->frame);
237 avctx->coded_frame = &s->frame;
243 * Read PCM samples macro
244 * @param size Data size of native machine format
245 * @param endian bytestream_get_xxx() endian suffix
246 * @param src Source pointer (variable name)
247 * @param dst Destination pointer (variable name)
248 * @param n Total number of samples (variable name)
249 * @param shift Bitshift (bits)
250 * @param offset Sample value offset
252 #define DECODE(size, endian, src, dst, n, shift, offset) \
253 for (; n > 0; n--) { \
254 uint ## size ## _t v = bytestream_get_ ## endian(&src); \
255 AV_WN ## size ## A(dst, (v - offset) << shift); \
259 static int pcm_decode_frame(AVCodecContext *avctx, void *data,
260 int *got_frame_ptr, AVPacket *avpkt)
262 const uint8_t *src = avpkt->data;
263 int buf_size = avpkt->size;
264 PCMDecode *s = avctx->priv_data;
265 int sample_size, c, n, ret, samples_per_block;
267 int32_t *dst_int32_t;
269 sample_size = av_get_bits_per_sample(avctx->codec_id) / 8;
271 /* av_get_bits_per_sample returns 0 for AV_CODEC_ID_PCM_DVD */
272 samples_per_block = 1;
273 if (AV_CODEC_ID_PCM_DVD == avctx->codec_id) {
274 if (avctx->bits_per_coded_sample != 20 &&
275 avctx->bits_per_coded_sample != 24) {
276 av_log(avctx, AV_LOG_ERROR, "PCM DVD unsupported sample depth\n");
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, "invalid PCM packet\n");
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:
343 const uint8_t *src2[MAX_CHANNELS];
344 n /= avctx->channels;
345 for (c = 0; c < avctx->channels; c++)
346 src2[c] = &src[c * n * 2];
348 for (c = 0; c < avctx->channels; c++) {
349 AV_WN16A(samples, bytestream_get_le16(&src2[c]));
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;
479 #define PCM_ENCODER(id_, sample_fmt_, name_, long_name_) \
480 AVCodec ff_ ## name_ ## _encoder = { \
482 .type = AVMEDIA_TYPE_AUDIO, \
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(id, sample_fmt_, name, long_name_)
497 #define PCM_DECODER(id_, sample_fmt_, name_, long_name_) \
498 AVCodec ff_ ## name_ ## _decoder = { \
500 .type = AVMEDIA_TYPE_AUDIO, \
502 .priv_data_size = sizeof(PCMDecode), \
503 .init = pcm_decode_init, \
504 .decode = pcm_decode_frame, \
505 .capabilities = CODEC_CAP_DR1, \
506 .sample_fmts = (const enum AVSampleFormat[]){ sample_fmt_, \
507 AV_SAMPLE_FMT_NONE }, \
508 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
511 #define PCM_DECODER(id, sample_fmt_, name, long_name_)
514 #define PCM_CODEC(id, sample_fmt_, name, long_name_) \
515 PCM_ENCODER(id, sample_fmt_, name, long_name_); \
516 PCM_DECODER(id, sample_fmt_, name, long_name_)
518 /* Note: Do not forget to add new entries to the Makefile as well. */
519 PCM_CODEC (AV_CODEC_ID_PCM_ALAW, AV_SAMPLE_FMT_S16, pcm_alaw, "PCM A-law");
520 PCM_DECODER(AV_CODEC_ID_PCM_DVD, AV_SAMPLE_FMT_S32, pcm_dvd, "PCM signed 20|24-bit big-endian");
521 PCM_CODEC (AV_CODEC_ID_PCM_F32BE, AV_SAMPLE_FMT_FLT, pcm_f32be, "PCM 32-bit floating point big-endian");
522 PCM_CODEC (AV_CODEC_ID_PCM_F32LE, AV_SAMPLE_FMT_FLT, pcm_f32le, "PCM 32-bit floating point little-endian");
523 PCM_CODEC (AV_CODEC_ID_PCM_F64BE, AV_SAMPLE_FMT_DBL, pcm_f64be, "PCM 64-bit floating point big-endian");
524 PCM_CODEC (AV_CODEC_ID_PCM_F64LE, AV_SAMPLE_FMT_DBL, pcm_f64le, "PCM 64-bit floating point little-endian");
525 PCM_DECODER(AV_CODEC_ID_PCM_LXF, AV_SAMPLE_FMT_S32P, pcm_lxf, "PCM signed 20-bit little-endian planar");
526 PCM_CODEC (AV_CODEC_ID_PCM_MULAW, AV_SAMPLE_FMT_S16, pcm_mulaw, "PCM mu-law");
527 PCM_CODEC (AV_CODEC_ID_PCM_S8, AV_SAMPLE_FMT_U8, pcm_s8, "PCM signed 8-bit");
528 PCM_CODEC (AV_CODEC_ID_PCM_S16BE, AV_SAMPLE_FMT_S16, pcm_s16be, "PCM signed 16-bit big-endian");
529 PCM_CODEC (AV_CODEC_ID_PCM_S16LE, AV_SAMPLE_FMT_S16, pcm_s16le, "PCM signed 16-bit little-endian");
530 PCM_DECODER(AV_CODEC_ID_PCM_S16LE_PLANAR, AV_SAMPLE_FMT_S16, pcm_s16le_planar, "PCM 16-bit little-endian planar");
531 PCM_CODEC (AV_CODEC_ID_PCM_S24BE, AV_SAMPLE_FMT_S32, pcm_s24be, "PCM signed 24-bit big-endian");
532 PCM_CODEC (AV_CODEC_ID_PCM_S24DAUD, AV_SAMPLE_FMT_S16, pcm_s24daud, "PCM D-Cinema audio signed 24-bit");
533 PCM_CODEC (AV_CODEC_ID_PCM_S24LE, AV_SAMPLE_FMT_S32, pcm_s24le, "PCM signed 24-bit little-endian");
534 PCM_CODEC (AV_CODEC_ID_PCM_S32BE, AV_SAMPLE_FMT_S32, pcm_s32be, "PCM signed 32-bit big-endian");
535 PCM_CODEC (AV_CODEC_ID_PCM_S32LE, AV_SAMPLE_FMT_S32, pcm_s32le, "PCM signed 32-bit little-endian");
536 PCM_CODEC (AV_CODEC_ID_PCM_U8, AV_SAMPLE_FMT_U8, pcm_u8, "PCM unsigned 8-bit");
537 PCM_CODEC (AV_CODEC_ID_PCM_U16BE, AV_SAMPLE_FMT_S16, pcm_u16be, "PCM unsigned 16-bit big-endian");
538 PCM_CODEC (AV_CODEC_ID_PCM_U16LE, AV_SAMPLE_FMT_S16, pcm_u16le, "PCM unsigned 16-bit little-endian");
539 PCM_CODEC (AV_CODEC_ID_PCM_U24BE, AV_SAMPLE_FMT_S32, pcm_u24be, "PCM unsigned 24-bit big-endian");
540 PCM_CODEC (AV_CODEC_ID_PCM_U24LE, AV_SAMPLE_FMT_S32, pcm_u24le, "PCM unsigned 24-bit little-endian");
541 PCM_CODEC (AV_CODEC_ID_PCM_U32BE, AV_SAMPLE_FMT_S32, pcm_u32be, "PCM unsigned 32-bit big-endian");
542 PCM_CODEC (AV_CODEC_ID_PCM_U32LE, AV_SAMPLE_FMT_S32, pcm_u32le, "PCM unsigned 32-bit little-endian");
543 PCM_DECODER(AV_CODEC_ID_PCM_ZORK, AV_SAMPLE_FMT_U8, pcm_zork, "PCM Zork");