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
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 = (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 int16_t *samples_int16_t;
88 int32_t *samples_int32_t;
89 int64_t *samples_int64_t;
90 uint16_t *samples_uint16_t;
91 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 == SAMPLE_FMT_S32)
232 avctx->bits_per_raw_sample = av_get_bits_per_sample(avctx->codec->id);
238 * Read PCM samples macro
239 * @param type Datatype 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(type, endian, src, dst, n, shift, offset) \
248 dst_##type = (type*)dst; \
250 register type v = bytestream_get_##endian(&src); \
251 *dst_##type++ = (v - offset) << shift; \
253 dst = (short*)dst_##type;
255 static int pcm_decode_frame(AVCodecContext *avctx,
256 void *data, int *data_size,
259 const uint8_t *buf = avpkt->data;
260 int buf_size = avpkt->size;
261 PCMDecode *s = avctx->priv_data;
262 int sample_size, c, n;
264 const uint8_t *src, *src8, *src2[MAX_CHANNELS];
266 int16_t *dst_int16_t;
267 int32_t *dst_int32_t;
268 int64_t *dst_int64_t;
269 uint16_t *dst_uint16_t;
270 uint32_t *dst_uint32_t;
275 if (avctx->sample_fmt!=avctx->codec->sample_fmts[0]) {
276 av_log(avctx, AV_LOG_ERROR, "invalid sample_fmt\n");
280 if(avctx->channels <= 0 || avctx->channels > MAX_CHANNELS){
281 av_log(avctx, AV_LOG_ERROR, "PCM channels out of bounds\n");
285 sample_size = av_get_bits_per_sample(avctx->codec_id)/8;
287 /* av_get_bits_per_sample returns 0 for CODEC_ID_PCM_DVD */
288 if (CODEC_ID_PCM_DVD == avctx->codec_id)
289 /* 2 samples are interleaved per block in PCM_DVD */
290 sample_size = avctx->bits_per_coded_sample * 2 / 8;
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 buf_size= FFMIN(buf_size, *data_size/2);
305 n = buf_size/sample_size;
307 switch(avctx->codec->id) {
308 case CODEC_ID_PCM_U32LE:
309 DECODE(uint32_t, le32, src, samples, n, 0, 0x80000000)
311 case CODEC_ID_PCM_U32BE:
312 DECODE(uint32_t, be32, src, samples, n, 0, 0x80000000)
314 case CODEC_ID_PCM_S24LE:
315 DECODE(int32_t, le24, src, samples, n, 8, 0)
317 case CODEC_ID_PCM_S24BE:
318 DECODE(int32_t, be24, src, samples, n, 8, 0)
320 case CODEC_ID_PCM_U24LE:
321 DECODE(uint32_t, le24, src, samples, n, 8, 0x800000)
323 case CODEC_ID_PCM_U24BE:
324 DECODE(uint32_t, be24, src, samples, n, 8, 0x800000)
326 case CODEC_ID_PCM_S24DAUD:
328 uint32_t v = bytestream_get_be24(&src);
329 v >>= 4; // sync flags are here
330 *samples++ = av_reverse[(v >> 8) & 0xff] +
331 (av_reverse[v & 0xff] << 8);
334 case CODEC_ID_PCM_S16LE_PLANAR:
335 n /= avctx->channels;
336 for(c=0;c<avctx->channels;c++)
337 src2[c] = &src[c*n*2];
339 for(c=0;c<avctx->channels;c++)
340 *samples++ = bytestream_get_le16(&src2[c]);
341 src = src2[avctx->channels-1];
343 case CODEC_ID_PCM_U16LE:
344 DECODE(uint16_t, le16, src, samples, n, 0, 0x8000)
346 case CODEC_ID_PCM_U16BE:
347 DECODE(uint16_t, be16, src, samples, n, 0, 0x8000)
349 case CODEC_ID_PCM_S8:
350 dstu8= (uint8_t*)samples;
352 *dstu8++ = *src++ + 128;
354 samples= (short*)dstu8;
357 case CODEC_ID_PCM_F64LE:
358 DECODE(int64_t, le64, src, samples, n, 0, 0)
360 case CODEC_ID_PCM_S32LE:
361 case CODEC_ID_PCM_F32LE:
362 DECODE(int32_t, le32, src, samples, n, 0, 0)
364 case CODEC_ID_PCM_S16LE:
365 DECODE(int16_t, le16, src, samples, n, 0, 0)
367 case CODEC_ID_PCM_F64BE:
368 case CODEC_ID_PCM_F32BE:
369 case CODEC_ID_PCM_S32BE:
370 case CODEC_ID_PCM_S16BE:
372 case CODEC_ID_PCM_F64BE:
373 DECODE(int64_t, be64, src, samples, n, 0, 0)
375 case CODEC_ID_PCM_F32BE:
376 case CODEC_ID_PCM_S32BE:
377 DECODE(int32_t, be32, src, samples, n, 0, 0)
379 case CODEC_ID_PCM_S16BE:
380 DECODE(int16_t, be16, src, samples, n, 0, 0)
382 case CODEC_ID_PCM_F64LE:
383 case CODEC_ID_PCM_F32LE:
384 case CODEC_ID_PCM_S32LE:
385 case CODEC_ID_PCM_S16LE:
386 #endif /* HAVE_BIGENDIAN */
387 case CODEC_ID_PCM_U8:
388 memcpy(samples, src, n*sample_size);
389 src += n*sample_size;
390 samples = (short*)((uint8_t*)data + n*sample_size);
392 case CODEC_ID_PCM_ZORK:
400 case CODEC_ID_PCM_ALAW:
401 case CODEC_ID_PCM_MULAW:
403 *samples++ = s->table[*src++];
406 case CODEC_ID_PCM_DVD:
408 n /= avctx->channels;
409 switch (avctx->bits_per_coded_sample) {
415 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8 &0xf0) << 8);
416 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++ &0x0f) << 12);
426 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);
427 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);
433 av_log(avctx, AV_LOG_ERROR, "PCM DVD unsupported sample depth\n");
437 samples = (short *) dst_int32_t;
442 *data_size = (uint8_t *)samples - (uint8_t *)data;
447 #define PCM_ENCODER(id_,sample_fmt_,name_,long_name_) \
448 AVCodec name_ ## _encoder = { \
450 .type = AVMEDIA_TYPE_AUDIO, \
452 .init = pcm_encode_init, \
453 .encode = pcm_encode_frame, \
454 .close = pcm_encode_close, \
455 .sample_fmts = (const enum SampleFormat[]){sample_fmt_,SAMPLE_FMT_NONE}, \
456 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
459 #define PCM_ENCODER(id,sample_fmt_,name,long_name_)
463 #define PCM_DECODER(id_,sample_fmt_,name_,long_name_) \
464 AVCodec name_ ## _decoder = { \
466 .type = AVMEDIA_TYPE_AUDIO, \
468 .priv_data_size = sizeof(PCMDecode), \
469 .init = pcm_decode_init, \
470 .decode = pcm_decode_frame, \
471 .sample_fmts = (const enum SampleFormat[]){sample_fmt_,SAMPLE_FMT_NONE}, \
472 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
475 #define PCM_DECODER(id,sample_fmt_,name,long_name_)
478 #define PCM_CODEC(id, sample_fmt_, name, long_name_) \
479 PCM_ENCODER(id,sample_fmt_,name,long_name_) PCM_DECODER(id,sample_fmt_,name,long_name_)
481 /* Note: Do not forget to add new entries to the Makefile as well. */
482 PCM_CODEC (CODEC_ID_PCM_ALAW, SAMPLE_FMT_S16, pcm_alaw, "PCM A-law");
483 PCM_CODEC (CODEC_ID_PCM_DVD, SAMPLE_FMT_S32, pcm_dvd, "PCM signed 20|24-bit big-endian");
484 PCM_CODEC (CODEC_ID_PCM_F32BE, SAMPLE_FMT_FLT, pcm_f32be, "PCM 32-bit floating point big-endian");
485 PCM_CODEC (CODEC_ID_PCM_F32LE, SAMPLE_FMT_FLT, pcm_f32le, "PCM 32-bit floating point little-endian");
486 PCM_CODEC (CODEC_ID_PCM_F64BE, SAMPLE_FMT_DBL, pcm_f64be, "PCM 64-bit floating point big-endian");
487 PCM_CODEC (CODEC_ID_PCM_F64LE, SAMPLE_FMT_DBL, pcm_f64le, "PCM 64-bit floating point little-endian");
488 PCM_CODEC (CODEC_ID_PCM_MULAW, SAMPLE_FMT_S16, pcm_mulaw, "PCM mu-law");
489 PCM_CODEC (CODEC_ID_PCM_S8, SAMPLE_FMT_U8, pcm_s8, "PCM signed 8-bit");
490 PCM_CODEC (CODEC_ID_PCM_S16BE, SAMPLE_FMT_S16, pcm_s16be, "PCM signed 16-bit big-endian");
491 PCM_CODEC (CODEC_ID_PCM_S16LE, SAMPLE_FMT_S16, pcm_s16le, "PCM signed 16-bit little-endian");
492 PCM_DECODER(CODEC_ID_PCM_S16LE_PLANAR, SAMPLE_FMT_S16, pcm_s16le_planar, "PCM 16-bit little-endian planar");
493 PCM_CODEC (CODEC_ID_PCM_S24BE, SAMPLE_FMT_S32, pcm_s24be, "PCM signed 24-bit big-endian");
494 PCM_CODEC (CODEC_ID_PCM_S24DAUD, SAMPLE_FMT_S16, pcm_s24daud, "PCM D-Cinema audio signed 24-bit");
495 PCM_CODEC (CODEC_ID_PCM_S24LE, SAMPLE_FMT_S32, pcm_s24le, "PCM signed 24-bit little-endian");
496 PCM_CODEC (CODEC_ID_PCM_S32BE, SAMPLE_FMT_S32, pcm_s32be, "PCM signed 32-bit big-endian");
497 PCM_CODEC (CODEC_ID_PCM_S32LE, SAMPLE_FMT_S32, pcm_s32le, "PCM signed 32-bit little-endian");
498 PCM_CODEC (CODEC_ID_PCM_U8, SAMPLE_FMT_U8, pcm_u8, "PCM unsigned 8-bit");
499 PCM_CODEC (CODEC_ID_PCM_U16BE, SAMPLE_FMT_S16, pcm_u16be, "PCM unsigned 16-bit big-endian");
500 PCM_CODEC (CODEC_ID_PCM_U16LE, SAMPLE_FMT_S16, pcm_u16le, "PCM unsigned 16-bit little-endian");
501 PCM_CODEC (CODEC_ID_PCM_U24BE, SAMPLE_FMT_S32, pcm_u24be, "PCM unsigned 24-bit big-endian");
502 PCM_CODEC (CODEC_ID_PCM_U24LE, SAMPLE_FMT_S32, pcm_u24le, "PCM unsigned 24-bit little-endian");
503 PCM_CODEC (CODEC_ID_PCM_U32BE, SAMPLE_FMT_S32, pcm_u32be, "PCM unsigned 32-bit big-endian");
504 PCM_CODEC (CODEC_ID_PCM_U32LE, SAMPLE_FMT_S32, pcm_u32le, "PCM unsigned 32-bit little-endian");
505 PCM_CODEC (CODEC_ID_PCM_ZORK, SAMPLE_FMT_S16, pcm_zork, "PCM Zork");