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 switch(avctx->codec->id) {
99 case CODEC_ID_PCM_U32LE:
100 ENCODE(uint32_t, le32, samples, dst, n, 0, 0x80000000)
102 case CODEC_ID_PCM_U32BE:
103 ENCODE(uint32_t, be32, samples, dst, n, 0, 0x80000000)
105 case CODEC_ID_PCM_S24LE:
106 ENCODE(int32_t, le24, samples, dst, n, 8, 0)
108 case CODEC_ID_PCM_S24BE:
109 ENCODE(int32_t, be24, samples, dst, n, 8, 0)
111 case CODEC_ID_PCM_U24LE:
112 ENCODE(uint32_t, le24, samples, dst, n, 8, 0x800000)
114 case CODEC_ID_PCM_U24BE:
115 ENCODE(uint32_t, be24, samples, dst, n, 8, 0x800000)
117 case CODEC_ID_PCM_S24DAUD:
119 uint32_t tmp = av_reverse[(*samples >> 8) & 0xff] +
120 (av_reverse[*samples & 0xff] << 8);
121 tmp <<= 4; // sync flags would go here
122 bytestream_put_be24(&dst, tmp);
126 case CODEC_ID_PCM_U16LE:
127 ENCODE(uint16_t, le16, samples, dst, n, 0, 0x8000)
129 case CODEC_ID_PCM_U16BE:
130 ENCODE(uint16_t, be16, samples, dst, n, 0, 0x8000)
132 case CODEC_ID_PCM_S8:
140 case CODEC_ID_PCM_F64LE:
141 ENCODE(int64_t, le64, samples, dst, n, 0, 0)
143 case CODEC_ID_PCM_S32LE:
144 case CODEC_ID_PCM_F32LE:
145 ENCODE(int32_t, le32, samples, dst, n, 0, 0)
147 case CODEC_ID_PCM_S16LE:
148 ENCODE(int16_t, le16, samples, dst, n, 0, 0)
150 case CODEC_ID_PCM_F64BE:
151 case CODEC_ID_PCM_F32BE:
152 case CODEC_ID_PCM_S32BE:
153 case CODEC_ID_PCM_S16BE:
155 case CODEC_ID_PCM_F64BE:
156 ENCODE(int64_t, be64, samples, dst, n, 0, 0)
158 case CODEC_ID_PCM_F32BE:
159 case CODEC_ID_PCM_S32BE:
160 ENCODE(int32_t, be32, samples, dst, n, 0, 0)
162 case CODEC_ID_PCM_S16BE:
163 ENCODE(int16_t, be16, samples, dst, n, 0, 0)
165 case CODEC_ID_PCM_F64LE:
166 case CODEC_ID_PCM_F32LE:
167 case CODEC_ID_PCM_S32LE:
168 case CODEC_ID_PCM_S16LE:
169 #endif /* HAVE_BIGENDIAN */
170 case CODEC_ID_PCM_U8:
171 memcpy(dst, samples, n*sample_size);
172 dst += n*sample_size;
174 case CODEC_ID_PCM_ZORK:
182 case CODEC_ID_PCM_ALAW:
185 *dst++ = linear_to_alaw[(v + 32768) >> 2];
188 case CODEC_ID_PCM_MULAW:
191 *dst++ = linear_to_ulaw[(v + 32768) >> 2];
197 //avctx->frame_size = (dst - frame) / (sample_size * avctx->channels);
202 typedef struct PCMDecode {
206 static av_cold int pcm_decode_init(AVCodecContext * avctx)
208 PCMDecode *s = avctx->priv_data;
211 if (avctx->channels <= 0 || avctx->channels > MAX_CHANNELS) {
212 av_log(avctx, AV_LOG_ERROR, "PCM channels out of bounds\n");
213 return AVERROR(EINVAL);
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 sample_size = av_get_bits_per_sample(avctx->codec_id)/8;
271 /* av_get_bits_per_sample returns 0 for CODEC_ID_PCM_DVD */
272 if (CODEC_ID_PCM_DVD == avctx->codec_id) {
273 if (avctx->bits_per_coded_sample != 20 &&
274 avctx->bits_per_coded_sample != 24) {
275 av_log(avctx, AV_LOG_ERROR, "PCM DVD unsupported sample depth\n");
276 return AVERROR(EINVAL);
278 /* 2 samples are interleaved per block in PCM_DVD */
279 sample_size = avctx->bits_per_coded_sample * 2 / 8;
280 } else if (avctx->codec_id == CODEC_ID_PCM_LXF)
281 /* we process 40-bit blocks per channel for LXF */
284 if (sample_size == 0) {
285 av_log(avctx, AV_LOG_ERROR, "Invalid sample_size\n");
286 return AVERROR(EINVAL);
289 n = avctx->channels * sample_size;
291 if(n && buf_size % n){
293 av_log(avctx, AV_LOG_ERROR, "invalid PCM packet\n");
296 buf_size -= buf_size % n;
299 buf_size= FFMIN(buf_size, *data_size/2);
301 n = buf_size/sample_size;
303 switch(avctx->codec->id) {
304 case CODEC_ID_PCM_U32LE:
305 DECODE(32, le32, src, samples, n, 0, 0x80000000)
307 case CODEC_ID_PCM_U32BE:
308 DECODE(32, be32, src, samples, n, 0, 0x80000000)
310 case CODEC_ID_PCM_S24LE:
311 DECODE(32, le24, src, samples, n, 8, 0)
313 case CODEC_ID_PCM_S24BE:
314 DECODE(32, be24, src, samples, n, 8, 0)
316 case CODEC_ID_PCM_U24LE:
317 DECODE(32, le24, src, samples, n, 8, 0x800000)
319 case CODEC_ID_PCM_U24BE:
320 DECODE(32, be24, src, samples, n, 8, 0x800000)
322 case CODEC_ID_PCM_S24DAUD:
324 uint32_t v = bytestream_get_be24(&src);
325 v >>= 4; // sync flags are here
326 AV_WN16A(samples, av_reverse[(v >> 8) & 0xff] +
327 (av_reverse[v & 0xff] << 8));
331 case CODEC_ID_PCM_S16LE_PLANAR:
332 n /= avctx->channels;
333 for(c=0;c<avctx->channels;c++)
334 src2[c] = &src[c*n*2];
336 for(c=0;c<avctx->channels;c++) {
337 AV_WN16A(samples, bytestream_get_le16(&src2[c]));
340 src = src2[avctx->channels-1];
342 case CODEC_ID_PCM_U16LE:
343 DECODE(16, le16, src, samples, n, 0, 0x8000)
345 case CODEC_ID_PCM_U16BE:
346 DECODE(16, be16, src, samples, n, 0, 0x8000)
348 case CODEC_ID_PCM_S8:
350 *samples++ = *src++ + 128;
354 case CODEC_ID_PCM_F64LE:
355 DECODE(64, le64, src, samples, n, 0, 0)
357 case CODEC_ID_PCM_S32LE:
358 case CODEC_ID_PCM_F32LE:
359 DECODE(32, le32, src, samples, n, 0, 0)
361 case CODEC_ID_PCM_S16LE:
362 DECODE(16, le16, src, samples, n, 0, 0)
364 case CODEC_ID_PCM_F64BE:
365 case CODEC_ID_PCM_F32BE:
366 case CODEC_ID_PCM_S32BE:
367 case CODEC_ID_PCM_S16BE:
369 case CODEC_ID_PCM_F64BE:
370 DECODE(64, be64, src, samples, n, 0, 0)
372 case CODEC_ID_PCM_F32BE:
373 case CODEC_ID_PCM_S32BE:
374 DECODE(32, be32, src, samples, n, 0, 0)
376 case CODEC_ID_PCM_S16BE:
377 DECODE(16, be16, src, samples, n, 0, 0)
379 case CODEC_ID_PCM_F64LE:
380 case CODEC_ID_PCM_F32LE:
381 case CODEC_ID_PCM_S32LE:
382 case CODEC_ID_PCM_S16LE:
383 #endif /* HAVE_BIGENDIAN */
384 case CODEC_ID_PCM_U8:
385 memcpy(samples, src, n*sample_size);
386 src += n*sample_size;
387 samples += n * sample_size;
389 case CODEC_ID_PCM_ZORK:
394 AV_WN16A(samples, x << 8);
398 case CODEC_ID_PCM_ALAW:
399 case CODEC_ID_PCM_MULAW:
401 AV_WN16A(samples, s->table[*src++]);
405 case CODEC_ID_PCM_DVD:
407 n /= avctx->channels;
408 switch (avctx->bits_per_coded_sample) {
414 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8 &0xf0) << 8);
415 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++ &0x0f) << 12);
425 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);
426 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);
432 samples = (uint8_t *) dst_int32_t;
434 case CODEC_ID_PCM_LXF:
436 n /= avctx->channels;
437 //unpack and de-planerize
438 for (i = 0; i < n; i++) {
439 for (c = 0, src8 = src + i*5; c < avctx->channels; c++, src8 += n*5) {
440 //extract low 20 bits and expand to 32 bits
441 *dst_int32_t++ = (src8[2] << 28) | (src8[1] << 20) | (src8[0] << 12) |
442 ((src8[2] & 0xF) << 8) | src8[1];
445 for (c = 0, src8 = src + i*5; c < avctx->channels; c++, src8 += n*5) {
446 //extract high 20 bits and expand to 32 bits
447 *dst_int32_t++ = (src8[4] << 24) | (src8[3] << 16) |
448 ((src8[2] & 0xF0) << 8) | (src8[4] << 4) | (src8[3] >> 4);
451 src += n * avctx->channels * 5;
452 samples = (uint8_t *) dst_int32_t;
457 *data_size = samples - (uint8_t *)data;
462 #define PCM_ENCODER(id_,sample_fmt_,name_,long_name_) \
463 AVCodec ff_ ## name_ ## _encoder = { \
465 .type = AVMEDIA_TYPE_AUDIO, \
467 .init = pcm_encode_init, \
468 .encode = pcm_encode_frame, \
469 .close = pcm_encode_close, \
470 .sample_fmts = (const enum AVSampleFormat[]){sample_fmt_,AV_SAMPLE_FMT_NONE}, \
471 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
474 #define PCM_ENCODER(id,sample_fmt_,name,long_name_)
478 #define PCM_DECODER(id_,sample_fmt_,name_,long_name_) \
479 AVCodec ff_ ## name_ ## _decoder = { \
481 .type = AVMEDIA_TYPE_AUDIO, \
483 .priv_data_size = sizeof(PCMDecode), \
484 .init = pcm_decode_init, \
485 .decode = pcm_decode_frame, \
486 .sample_fmts = (const enum AVSampleFormat[]){sample_fmt_,AV_SAMPLE_FMT_NONE}, \
487 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
490 #define PCM_DECODER(id,sample_fmt_,name,long_name_)
493 #define PCM_CODEC(id, sample_fmt_, name, long_name_) \
494 PCM_ENCODER(id,sample_fmt_,name,long_name_); PCM_DECODER(id,sample_fmt_,name,long_name_)
496 /* Note: Do not forget to add new entries to the Makefile as well. */
497 PCM_CODEC (CODEC_ID_PCM_ALAW, AV_SAMPLE_FMT_S16, pcm_alaw, "PCM A-law");
498 PCM_DECODER(CODEC_ID_PCM_DVD, AV_SAMPLE_FMT_S32, pcm_dvd, "PCM signed 20|24-bit big-endian");
499 PCM_CODEC (CODEC_ID_PCM_F32BE, AV_SAMPLE_FMT_FLT, pcm_f32be, "PCM 32-bit floating point big-endian");
500 PCM_CODEC (CODEC_ID_PCM_F32LE, AV_SAMPLE_FMT_FLT, pcm_f32le, "PCM 32-bit floating point little-endian");
501 PCM_CODEC (CODEC_ID_PCM_F64BE, AV_SAMPLE_FMT_DBL, pcm_f64be, "PCM 64-bit floating point big-endian");
502 PCM_CODEC (CODEC_ID_PCM_F64LE, AV_SAMPLE_FMT_DBL, pcm_f64le, "PCM 64-bit floating point little-endian");
503 PCM_DECODER(CODEC_ID_PCM_LXF, AV_SAMPLE_FMT_S32, pcm_lxf, "PCM signed 20-bit little-endian planar");
504 PCM_CODEC (CODEC_ID_PCM_MULAW, AV_SAMPLE_FMT_S16, pcm_mulaw, "PCM mu-law");
505 PCM_CODEC (CODEC_ID_PCM_S8, AV_SAMPLE_FMT_U8, pcm_s8, "PCM signed 8-bit");
506 PCM_CODEC (CODEC_ID_PCM_S16BE, AV_SAMPLE_FMT_S16, pcm_s16be, "PCM signed 16-bit big-endian");
507 PCM_CODEC (CODEC_ID_PCM_S16LE, AV_SAMPLE_FMT_S16, pcm_s16le, "PCM signed 16-bit little-endian");
508 PCM_DECODER(CODEC_ID_PCM_S16LE_PLANAR, AV_SAMPLE_FMT_S16, pcm_s16le_planar, "PCM 16-bit little-endian planar");
509 PCM_CODEC (CODEC_ID_PCM_S24BE, AV_SAMPLE_FMT_S32, pcm_s24be, "PCM signed 24-bit big-endian");
510 PCM_CODEC (CODEC_ID_PCM_S24DAUD, AV_SAMPLE_FMT_S16, pcm_s24daud, "PCM D-Cinema audio signed 24-bit");
511 PCM_CODEC (CODEC_ID_PCM_S24LE, AV_SAMPLE_FMT_S32, pcm_s24le, "PCM signed 24-bit little-endian");
512 PCM_CODEC (CODEC_ID_PCM_S32BE, AV_SAMPLE_FMT_S32, pcm_s32be, "PCM signed 32-bit big-endian");
513 PCM_CODEC (CODEC_ID_PCM_S32LE, AV_SAMPLE_FMT_S32, pcm_s32le, "PCM signed 32-bit little-endian");
514 PCM_CODEC (CODEC_ID_PCM_U8, AV_SAMPLE_FMT_U8, pcm_u8, "PCM unsigned 8-bit");
515 PCM_CODEC (CODEC_ID_PCM_U16BE, AV_SAMPLE_FMT_S16, pcm_u16be, "PCM unsigned 16-bit big-endian");
516 PCM_CODEC (CODEC_ID_PCM_U16LE, AV_SAMPLE_FMT_S16, pcm_u16le, "PCM unsigned 16-bit little-endian");
517 PCM_CODEC (CODEC_ID_PCM_U24BE, AV_SAMPLE_FMT_S32, pcm_u24be, "PCM unsigned 24-bit big-endian");
518 PCM_CODEC (CODEC_ID_PCM_U24LE, AV_SAMPLE_FMT_S32, pcm_u24le, "PCM unsigned 24-bit little-endian");
519 PCM_CODEC (CODEC_ID_PCM_U32BE, AV_SAMPLE_FMT_S32, pcm_u32be, "PCM unsigned 32-bit big-endian");
520 PCM_CODEC (CODEC_ID_PCM_U32LE, AV_SAMPLE_FMT_S32, pcm_u32le, "PCM unsigned 32-bit little-endian");
521 PCM_CODEC (CODEC_ID_PCM_ZORK, AV_SAMPLE_FMT_S16, pcm_zork, "PCM Zork");