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
28 #include "libavutil/common.h" /* for av_reverse */
29 #include "bytestream.h"
30 #include "pcm_tablegen.h"
32 #define MAX_CHANNELS 64
34 static av_cold int pcm_encode_init(AVCodecContext *avctx)
36 avctx->frame_size = 1;
37 switch(avctx->codec->id) {
38 case CODEC_ID_PCM_ALAW:
41 case 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->coded_frame= avcodec_alloc_frame();
51 avctx->coded_frame->key_frame= 1;
56 static av_cold int pcm_encode_close(AVCodecContext *avctx)
58 av_freep(&avctx->coded_frame);
64 * Write PCM samples macro
65 * @param type Datatype of native machine format
66 * @param endian bytestream_put_xxx() suffix
67 * @param src Source pointer (variable name)
68 * @param dst Destination pointer (variable name)
69 * @param n Total number of samples (variable name)
70 * @param shift Bitshift (bits)
71 * @param offset Sample value offset
73 #define ENCODE(type, endian, src, dst, n, shift, offset) \
74 samples_##type = (const type*) src; \
76 register type v = (*samples_##type++ >> shift) + offset; \
77 bytestream_put_##endian(&dst, v); \
80 static int pcm_encode_frame(AVCodecContext *avctx,
81 unsigned char *frame, int buf_size, void *data)
83 int n, sample_size, v;
87 const int16_t *samples_int16_t;
88 const int32_t *samples_int32_t;
89 const int64_t *samples_int64_t;
90 const uint16_t *samples_uint16_t;
91 const uint32_t *samples_uint32_t;
93 sample_size = av_get_bits_per_sample(avctx->codec->id)/8;
94 n = buf_size / sample_size;
98 if (avctx->sample_fmt!=avctx->codec->sample_fmts[0]) {
99 av_log(avctx, AV_LOG_ERROR, "invalid sample_fmt\n");
103 switch(avctx->codec->id) {
104 case CODEC_ID_PCM_U32LE:
105 ENCODE(uint32_t, le32, samples, dst, n, 0, 0x80000000)
107 case CODEC_ID_PCM_U32BE:
108 ENCODE(uint32_t, be32, samples, dst, n, 0, 0x80000000)
110 case CODEC_ID_PCM_S24LE:
111 ENCODE(int32_t, le24, samples, dst, n, 8, 0)
113 case CODEC_ID_PCM_S24BE:
114 ENCODE(int32_t, be24, samples, dst, n, 8, 0)
116 case CODEC_ID_PCM_U24LE:
117 ENCODE(uint32_t, le24, samples, dst, n, 8, 0x800000)
119 case CODEC_ID_PCM_U24BE:
120 ENCODE(uint32_t, be24, samples, dst, n, 8, 0x800000)
122 case CODEC_ID_PCM_S24DAUD:
124 uint32_t tmp = av_reverse[(*samples >> 8) & 0xff] +
125 (av_reverse[*samples & 0xff] << 8);
126 tmp <<= 4; // sync flags would go here
127 bytestream_put_be24(&dst, tmp);
131 case CODEC_ID_PCM_U16LE:
132 ENCODE(uint16_t, le16, samples, dst, n, 0, 0x8000)
134 case CODEC_ID_PCM_U16BE:
135 ENCODE(uint16_t, be16, samples, dst, n, 0, 0x8000)
137 case CODEC_ID_PCM_S8:
145 case CODEC_ID_PCM_F64LE:
146 ENCODE(int64_t, le64, samples, dst, n, 0, 0)
148 case CODEC_ID_PCM_S32LE:
149 case CODEC_ID_PCM_F32LE:
150 ENCODE(int32_t, le32, samples, dst, n, 0, 0)
152 case CODEC_ID_PCM_S16LE:
153 ENCODE(int16_t, le16, samples, dst, n, 0, 0)
155 case CODEC_ID_PCM_F64BE:
156 case CODEC_ID_PCM_F32BE:
157 case CODEC_ID_PCM_S32BE:
158 case CODEC_ID_PCM_S16BE:
160 case CODEC_ID_PCM_F64BE:
161 ENCODE(int64_t, be64, samples, dst, n, 0, 0)
163 case CODEC_ID_PCM_F32BE:
164 case CODEC_ID_PCM_S32BE:
165 ENCODE(int32_t, be32, samples, dst, n, 0, 0)
167 case CODEC_ID_PCM_S16BE:
168 ENCODE(int16_t, be16, samples, dst, n, 0, 0)
170 case CODEC_ID_PCM_F64LE:
171 case CODEC_ID_PCM_F32LE:
172 case CODEC_ID_PCM_S32LE:
173 case CODEC_ID_PCM_S16LE:
174 #endif /* HAVE_BIGENDIAN */
175 case CODEC_ID_PCM_U8:
176 memcpy(dst, samples, n*sample_size);
177 dst += n*sample_size;
179 case CODEC_ID_PCM_ZORK:
187 case CODEC_ID_PCM_ALAW:
190 *dst++ = linear_to_alaw[(v + 32768) >> 2];
193 case CODEC_ID_PCM_MULAW:
196 *dst++ = linear_to_ulaw[(v + 32768) >> 2];
202 //avctx->frame_size = (dst - frame) / (sample_size * avctx->channels);
207 typedef struct PCMDecode {
211 static av_cold int pcm_decode_init(AVCodecContext * avctx)
213 PCMDecode *s = avctx->priv_data;
216 switch(avctx->codec->id) {
217 case CODEC_ID_PCM_ALAW:
219 s->table[i] = alaw2linear(i);
221 case CODEC_ID_PCM_MULAW:
223 s->table[i] = ulaw2linear(i);
229 avctx->sample_fmt = avctx->codec->sample_fmts[0];
231 if (avctx->sample_fmt == AV_SAMPLE_FMT_S32)
232 avctx->bits_per_raw_sample = av_get_bits_per_sample(avctx->codec->id);
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) \
249 uint##size##_t v = bytestream_get_##endian(&src); \
250 AV_WN##size##A(dst, (v - offset) << shift); \
254 static int pcm_decode_frame(AVCodecContext *avctx,
255 void *data, int *data_size,
258 const uint8_t *buf = avpkt->data;
259 int buf_size = avpkt->size;
260 PCMDecode *s = avctx->priv_data;
261 int sample_size, c, n, i;
263 const uint8_t *src, *src8, *src2[MAX_CHANNELS];
264 int32_t *dst_int32_t;
269 if(avctx->channels <= 0 || avctx->channels > MAX_CHANNELS){
270 av_log(avctx, AV_LOG_ERROR, "PCM channels out of bounds\n");
274 sample_size = av_get_bits_per_sample(avctx->codec_id)/8;
276 /* av_get_bits_per_sample returns 0 for CODEC_ID_PCM_DVD */
277 if (CODEC_ID_PCM_DVD == avctx->codec_id) {
278 if (avctx->bits_per_coded_sample != 20 &&
279 avctx->bits_per_coded_sample != 24) {
280 av_log(avctx, AV_LOG_ERROR, "PCM DVD unsupported sample depth\n");
281 return AVERROR(EINVAL);
283 /* 2 samples are interleaved per block in PCM_DVD */
284 sample_size = avctx->bits_per_coded_sample * 2 / 8;
285 } else if (avctx->codec_id == CODEC_ID_PCM_LXF)
286 /* we process 40-bit blocks per channel for LXF */
289 if (sample_size == 0) {
290 av_log(avctx, AV_LOG_ERROR, "Invalid sample_size\n");
291 return AVERROR(EINVAL);
294 n = avctx->channels * sample_size;
296 if(n && buf_size % n){
298 av_log(avctx, AV_LOG_ERROR, "invalid PCM packet\n");
301 buf_size -= buf_size % n;
304 buf_size= FFMIN(buf_size, *data_size/2);
306 n = buf_size/sample_size;
308 switch(avctx->codec->id) {
309 case CODEC_ID_PCM_U32LE:
310 DECODE(32, le32, src, samples, n, 0, 0x80000000)
312 case CODEC_ID_PCM_U32BE:
313 DECODE(32, be32, src, samples, n, 0, 0x80000000)
315 case CODEC_ID_PCM_S24LE:
316 DECODE(32, le24, src, samples, n, 8, 0)
318 case CODEC_ID_PCM_S24BE:
319 DECODE(32, be24, src, samples, n, 8, 0)
321 case CODEC_ID_PCM_U24LE:
322 DECODE(32, le24, src, samples, n, 8, 0x800000)
324 case CODEC_ID_PCM_U24BE:
325 DECODE(32, be24, src, samples, n, 8, 0x800000)
327 case CODEC_ID_PCM_S24DAUD:
329 uint32_t v = bytestream_get_be24(&src);
330 v >>= 4; // sync flags are here
331 AV_WN16A(samples, av_reverse[(v >> 8) & 0xff] +
332 (av_reverse[v & 0xff] << 8));
336 case CODEC_ID_PCM_S16LE_PLANAR:
337 n /= avctx->channels;
338 for(c=0;c<avctx->channels;c++)
339 src2[c] = &src[c*n*2];
341 for(c=0;c<avctx->channels;c++) {
342 AV_WN16A(samples, bytestream_get_le16(&src2[c]));
345 src = src2[avctx->channels-1];
347 case CODEC_ID_PCM_U16LE:
348 DECODE(16, le16, src, samples, n, 0, 0x8000)
350 case CODEC_ID_PCM_U16BE:
351 DECODE(16, be16, src, samples, n, 0, 0x8000)
353 case CODEC_ID_PCM_S8:
355 *samples++ = *src++ + 128;
359 case CODEC_ID_PCM_F64LE:
360 DECODE(64, le64, src, samples, n, 0, 0)
362 case CODEC_ID_PCM_S32LE:
363 case CODEC_ID_PCM_F32LE:
364 DECODE(32, le32, src, samples, n, 0, 0)
366 case CODEC_ID_PCM_S16LE:
367 DECODE(16, le16, src, samples, n, 0, 0)
369 case CODEC_ID_PCM_F64BE:
370 case CODEC_ID_PCM_F32BE:
371 case CODEC_ID_PCM_S32BE:
372 case CODEC_ID_PCM_S16BE:
374 case CODEC_ID_PCM_F64BE:
375 DECODE(64, be64, src, samples, n, 0, 0)
377 case CODEC_ID_PCM_F32BE:
378 case CODEC_ID_PCM_S32BE:
379 DECODE(32, be32, src, samples, n, 0, 0)
381 case CODEC_ID_PCM_S16BE:
382 DECODE(16, be16, src, samples, n, 0, 0)
384 case CODEC_ID_PCM_F64LE:
385 case CODEC_ID_PCM_F32LE:
386 case CODEC_ID_PCM_S32LE:
387 case CODEC_ID_PCM_S16LE:
388 #endif /* HAVE_BIGENDIAN */
389 case CODEC_ID_PCM_U8:
390 memcpy(samples, src, n*sample_size);
391 src += n*sample_size;
392 samples += n * sample_size;
394 case CODEC_ID_PCM_ZORK:
399 AV_WN16A(samples, x << 8);
403 case CODEC_ID_PCM_ALAW:
404 case CODEC_ID_PCM_MULAW:
406 AV_WN16A(samples, s->table[*src++]);
410 case CODEC_ID_PCM_DVD:
412 n /= avctx->channels;
413 switch (avctx->bits_per_coded_sample) {
419 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8 &0xf0) << 8);
420 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++ &0x0f) << 12);
430 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);
431 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);
437 samples = (uint8_t *) dst_int32_t;
439 case CODEC_ID_PCM_LXF:
441 n /= avctx->channels;
442 //unpack and de-planerize
443 for (i = 0; i < n; i++) {
444 for (c = 0, src8 = src + i*5; c < avctx->channels; c++, src8 += n*5) {
445 //extract low 20 bits and expand to 32 bits
446 *dst_int32_t++ = (src8[2] << 28) | (src8[1] << 20) | (src8[0] << 12) |
447 ((src8[2] & 0xF) << 8) | src8[1];
450 for (c = 0, src8 = src + i*5; c < avctx->channels; c++, src8 += n*5) {
451 //extract high 20 bits and expand to 32 bits
452 *dst_int32_t++ = (src8[4] << 24) | (src8[3] << 16) |
453 ((src8[2] & 0xF0) << 8) | (src8[4] << 4) | (src8[3] >> 4);
456 src += n * avctx->channels * 5;
457 samples = (uint8_t *) dst_int32_t;
462 *data_size = samples - (uint8_t *)data;
467 #define PCM_ENCODER(id_,sample_fmt_,name_,long_name_) \
468 AVCodec ff_ ## name_ ## _encoder = { \
470 .type = AVMEDIA_TYPE_AUDIO, \
472 .init = pcm_encode_init, \
473 .encode = pcm_encode_frame, \
474 .close = pcm_encode_close, \
475 .sample_fmts = (const enum AVSampleFormat[]){sample_fmt_,AV_SAMPLE_FMT_NONE}, \
476 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
479 #define PCM_ENCODER(id,sample_fmt_,name,long_name_)
483 #define PCM_DECODER(id_,sample_fmt_,name_,long_name_) \
484 AVCodec ff_ ## name_ ## _decoder = { \
486 .type = AVMEDIA_TYPE_AUDIO, \
488 .priv_data_size = sizeof(PCMDecode), \
489 .init = pcm_decode_init, \
490 .decode = pcm_decode_frame, \
491 .sample_fmts = (const enum AVSampleFormat[]){sample_fmt_,AV_SAMPLE_FMT_NONE}, \
492 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
495 #define PCM_DECODER(id,sample_fmt_,name,long_name_)
498 #define PCM_CODEC(id, sample_fmt_, name, long_name_) \
499 PCM_ENCODER(id,sample_fmt_,name,long_name_); PCM_DECODER(id,sample_fmt_,name,long_name_)
501 /* Note: Do not forget to add new entries to the Makefile as well. */
502 PCM_CODEC (CODEC_ID_PCM_ALAW, AV_SAMPLE_FMT_S16, pcm_alaw, "PCM A-law");
503 PCM_DECODER(CODEC_ID_PCM_DVD, AV_SAMPLE_FMT_S32, pcm_dvd, "PCM signed 20|24-bit big-endian");
504 PCM_CODEC (CODEC_ID_PCM_F32BE, AV_SAMPLE_FMT_FLT, pcm_f32be, "PCM 32-bit floating point big-endian");
505 PCM_CODEC (CODEC_ID_PCM_F32LE, AV_SAMPLE_FMT_FLT, pcm_f32le, "PCM 32-bit floating point little-endian");
506 PCM_CODEC (CODEC_ID_PCM_F64BE, AV_SAMPLE_FMT_DBL, pcm_f64be, "PCM 64-bit floating point big-endian");
507 PCM_CODEC (CODEC_ID_PCM_F64LE, AV_SAMPLE_FMT_DBL, pcm_f64le, "PCM 64-bit floating point little-endian");
508 PCM_DECODER(CODEC_ID_PCM_LXF, AV_SAMPLE_FMT_S32, pcm_lxf, "PCM signed 20-bit little-endian planar");
509 PCM_CODEC (CODEC_ID_PCM_MULAW, AV_SAMPLE_FMT_S16, pcm_mulaw, "PCM mu-law");
510 PCM_CODEC (CODEC_ID_PCM_S8, AV_SAMPLE_FMT_U8, pcm_s8, "PCM signed 8-bit");
511 PCM_CODEC (CODEC_ID_PCM_S16BE, AV_SAMPLE_FMT_S16, pcm_s16be, "PCM signed 16-bit big-endian");
512 PCM_CODEC (CODEC_ID_PCM_S16LE, AV_SAMPLE_FMT_S16, pcm_s16le, "PCM signed 16-bit little-endian");
513 PCM_DECODER(CODEC_ID_PCM_S16LE_PLANAR, AV_SAMPLE_FMT_S16, pcm_s16le_planar, "PCM 16-bit little-endian planar");
514 PCM_CODEC (CODEC_ID_PCM_S24BE, AV_SAMPLE_FMT_S32, pcm_s24be, "PCM signed 24-bit big-endian");
515 PCM_CODEC (CODEC_ID_PCM_S24DAUD, AV_SAMPLE_FMT_S16, pcm_s24daud, "PCM D-Cinema audio signed 24-bit");
516 PCM_CODEC (CODEC_ID_PCM_S24LE, AV_SAMPLE_FMT_S32, pcm_s24le, "PCM signed 24-bit little-endian");
517 PCM_CODEC (CODEC_ID_PCM_S32BE, AV_SAMPLE_FMT_S32, pcm_s32be, "PCM signed 32-bit big-endian");
518 PCM_CODEC (CODEC_ID_PCM_S32LE, AV_SAMPLE_FMT_S32, pcm_s32le, "PCM signed 32-bit little-endian");
519 PCM_CODEC (CODEC_ID_PCM_U8, AV_SAMPLE_FMT_U8, pcm_u8, "PCM unsigned 8-bit");
520 PCM_CODEC (CODEC_ID_PCM_U16BE, AV_SAMPLE_FMT_S16, pcm_u16be, "PCM unsigned 16-bit big-endian");
521 PCM_CODEC (CODEC_ID_PCM_U16LE, AV_SAMPLE_FMT_S16, pcm_u16le, "PCM unsigned 16-bit little-endian");
522 PCM_CODEC (CODEC_ID_PCM_U24BE, AV_SAMPLE_FMT_S32, pcm_u24be, "PCM unsigned 24-bit big-endian");
523 PCM_CODEC (CODEC_ID_PCM_U24LE, AV_SAMPLE_FMT_S32, pcm_u24le, "PCM unsigned 24-bit little-endian");
524 PCM_CODEC (CODEC_ID_PCM_U32BE, AV_SAMPLE_FMT_S32, pcm_u32be, "PCM unsigned 32-bit big-endian");
525 PCM_CODEC (CODEC_ID_PCM_U32LE, AV_SAMPLE_FMT_S32, pcm_u32le, "PCM unsigned 32-bit little-endian");
526 PCM_CODEC (CODEC_ID_PCM_ZORK, AV_SAMPLE_FMT_S16, pcm_zork, "PCM Zork");