Add ff_ prefix to data symbols of encoders, decoders, hwaccel, parsers, bsf.
[libav.git] / libavcodec / pcm.c
1 /*
2 * PCM codecs
3 * Copyright (c) 2001 Fabrice Bellard
4 *
5 * This file is part of FFmpeg.
6 *
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.
11 *
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.
16 *
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
20 */
21
22 /**
23 * @file
24 * PCM codecs
25 */
26
27 #include "avcodec.h"
28 #include "libavutil/common.h" /* for av_reverse */
29 #include "bytestream.h"
30 #include "pcm_tablegen.h"
31
32 #define MAX_CHANNELS 64
33
34 static av_cold int pcm_encode_init(AVCodecContext *avctx)
35 {
36 avctx->frame_size = 1;
37 switch(avctx->codec->id) {
38 case CODEC_ID_PCM_ALAW:
39 pcm_alaw_tableinit();
40 break;
41 case CODEC_ID_PCM_MULAW:
42 pcm_ulaw_tableinit();
43 break;
44 default:
45 break;
46 }
47
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;
52
53 return 0;
54 }
55
56 static av_cold int pcm_encode_close(AVCodecContext *avctx)
57 {
58 av_freep(&avctx->coded_frame);
59
60 return 0;
61 }
62
63 /**
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
72 */
73 #define ENCODE(type, endian, src, dst, n, shift, offset) \
74 samples_##type = (type*)src; \
75 for(;n>0;n--) { \
76 register type v = (*samples_##type++ >> shift) + offset; \
77 bytestream_put_##endian(&dst, v); \
78 }
79
80 static int pcm_encode_frame(AVCodecContext *avctx,
81 unsigned char *frame, int buf_size, void *data)
82 {
83 int n, sample_size, v;
84 const short *samples;
85 unsigned char *dst;
86 const uint8_t *srcu8;
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;
92
93 sample_size = av_get_bits_per_sample(avctx->codec->id)/8;
94 n = buf_size / sample_size;
95 samples = data;
96 dst = frame;
97
98 if (avctx->sample_fmt!=avctx->codec->sample_fmts[0]) {
99 av_log(avctx, AV_LOG_ERROR, "invalid sample_fmt\n");
100 return -1;
101 }
102
103 switch(avctx->codec->id) {
104 case CODEC_ID_PCM_U32LE:
105 ENCODE(uint32_t, le32, samples, dst, n, 0, 0x80000000)
106 break;
107 case CODEC_ID_PCM_U32BE:
108 ENCODE(uint32_t, be32, samples, dst, n, 0, 0x80000000)
109 break;
110 case CODEC_ID_PCM_S24LE:
111 ENCODE(int32_t, le24, samples, dst, n, 8, 0)
112 break;
113 case CODEC_ID_PCM_S24BE:
114 ENCODE(int32_t, be24, samples, dst, n, 8, 0)
115 break;
116 case CODEC_ID_PCM_U24LE:
117 ENCODE(uint32_t, le24, samples, dst, n, 8, 0x800000)
118 break;
119 case CODEC_ID_PCM_U24BE:
120 ENCODE(uint32_t, be24, samples, dst, n, 8, 0x800000)
121 break;
122 case CODEC_ID_PCM_S24DAUD:
123 for(;n>0;n--) {
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);
128 samples++;
129 }
130 break;
131 case CODEC_ID_PCM_U16LE:
132 ENCODE(uint16_t, le16, samples, dst, n, 0, 0x8000)
133 break;
134 case CODEC_ID_PCM_U16BE:
135 ENCODE(uint16_t, be16, samples, dst, n, 0, 0x8000)
136 break;
137 case CODEC_ID_PCM_S8:
138 srcu8= data;
139 for(;n>0;n--) {
140 v = *srcu8++;
141 *dst++ = v - 128;
142 }
143 break;
144 #if HAVE_BIGENDIAN
145 case CODEC_ID_PCM_F64LE:
146 ENCODE(int64_t, le64, samples, dst, n, 0, 0)
147 break;
148 case CODEC_ID_PCM_S32LE:
149 case CODEC_ID_PCM_F32LE:
150 ENCODE(int32_t, le32, samples, dst, n, 0, 0)
151 break;
152 case CODEC_ID_PCM_S16LE:
153 ENCODE(int16_t, le16, samples, dst, n, 0, 0)
154 break;
155 case CODEC_ID_PCM_F64BE:
156 case CODEC_ID_PCM_F32BE:
157 case CODEC_ID_PCM_S32BE:
158 case CODEC_ID_PCM_S16BE:
159 #else
160 case CODEC_ID_PCM_F64BE:
161 ENCODE(int64_t, be64, samples, dst, n, 0, 0)
162 break;
163 case CODEC_ID_PCM_F32BE:
164 case CODEC_ID_PCM_S32BE:
165 ENCODE(int32_t, be32, samples, dst, n, 0, 0)
166 break;
167 case CODEC_ID_PCM_S16BE:
168 ENCODE(int16_t, be16, samples, dst, n, 0, 0)
169 break;
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;
178 break;
179 case CODEC_ID_PCM_ZORK:
180 for(;n>0;n--) {
181 v= *samples++ >> 8;
182 if(v<0) v = -v;
183 else v+= 128;
184 *dst++ = v;
185 }
186 break;
187 case CODEC_ID_PCM_ALAW:
188 for(;n>0;n--) {
189 v = *samples++;
190 *dst++ = linear_to_alaw[(v + 32768) >> 2];
191 }
192 break;
193 case CODEC_ID_PCM_MULAW:
194 for(;n>0;n--) {
195 v = *samples++;
196 *dst++ = linear_to_ulaw[(v + 32768) >> 2];
197 }
198 break;
199 default:
200 return -1;
201 }
202 //avctx->frame_size = (dst - frame) / (sample_size * avctx->channels);
203
204 return dst - frame;
205 }
206
207 typedef struct PCMDecode {
208 short table[256];
209 } PCMDecode;
210
211 static av_cold int pcm_decode_init(AVCodecContext * avctx)
212 {
213 PCMDecode *s = avctx->priv_data;
214 int i;
215
216 switch(avctx->codec->id) {
217 case CODEC_ID_PCM_ALAW:
218 for(i=0;i<256;i++)
219 s->table[i] = alaw2linear(i);
220 break;
221 case CODEC_ID_PCM_MULAW:
222 for(i=0;i<256;i++)
223 s->table[i] = ulaw2linear(i);
224 break;
225 default:
226 break;
227 }
228
229 avctx->sample_fmt = avctx->codec->sample_fmts[0];
230
231 if (avctx->sample_fmt == AV_SAMPLE_FMT_S32)
232 avctx->bits_per_raw_sample = av_get_bits_per_sample(avctx->codec->id);
233
234 return 0;
235 }
236
237 /**
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
246 */
247 #define DECODE(type, endian, src, dst, n, shift, offset) \
248 dst_##type = (type*)dst; \
249 for(;n>0;n--) { \
250 register type v = bytestream_get_##endian(&src); \
251 *dst_##type++ = (v - offset) << shift; \
252 } \
253 dst = (short*)dst_##type;
254
255 static int pcm_decode_frame(AVCodecContext *avctx,
256 void *data, int *data_size,
257 AVPacket *avpkt)
258 {
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, i;
263 short *samples;
264 const uint8_t *src, *src8, *src2[MAX_CHANNELS];
265 uint8_t *dstu8;
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;
271
272 samples = data;
273 src = buf;
274
275 if (avctx->sample_fmt!=avctx->codec->sample_fmts[0]) {
276 av_log(avctx, AV_LOG_ERROR, "invalid sample_fmt\n");
277 return -1;
278 }
279
280 if(avctx->channels <= 0 || avctx->channels > MAX_CHANNELS){
281 av_log(avctx, AV_LOG_ERROR, "PCM channels out of bounds\n");
282 return -1;
283 }
284
285 sample_size = av_get_bits_per_sample(avctx->codec_id)/8;
286
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;
291 else if (avctx->codec_id == CODEC_ID_PCM_LXF)
292 /* we process 40-bit blocks per channel for LXF */
293 sample_size = 5;
294
295 if (sample_size == 0) {
296 av_log(avctx, AV_LOG_ERROR, "Invalid sample_size\n");
297 return AVERROR(EINVAL);
298 }
299
300 n = avctx->channels * sample_size;
301
302 if(n && buf_size % n){
303 if (buf_size < n) {
304 av_log(avctx, AV_LOG_ERROR, "invalid PCM packet\n");
305 return -1;
306 }else
307 buf_size -= buf_size % n;
308 }
309
310 buf_size= FFMIN(buf_size, *data_size/2);
311 *data_size=0;
312
313 n = buf_size/sample_size;
314
315 switch(avctx->codec->id) {
316 case CODEC_ID_PCM_U32LE:
317 DECODE(uint32_t, le32, src, samples, n, 0, 0x80000000)
318 break;
319 case CODEC_ID_PCM_U32BE:
320 DECODE(uint32_t, be32, src, samples, n, 0, 0x80000000)
321 break;
322 case CODEC_ID_PCM_S24LE:
323 DECODE(int32_t, le24, src, samples, n, 8, 0)
324 break;
325 case CODEC_ID_PCM_S24BE:
326 DECODE(int32_t, be24, src, samples, n, 8, 0)
327 break;
328 case CODEC_ID_PCM_U24LE:
329 DECODE(uint32_t, le24, src, samples, n, 8, 0x800000)
330 break;
331 case CODEC_ID_PCM_U24BE:
332 DECODE(uint32_t, be24, src, samples, n, 8, 0x800000)
333 break;
334 case CODEC_ID_PCM_S24DAUD:
335 for(;n>0;n--) {
336 uint32_t v = bytestream_get_be24(&src);
337 v >>= 4; // sync flags are here
338 *samples++ = av_reverse[(v >> 8) & 0xff] +
339 (av_reverse[v & 0xff] << 8);
340 }
341 break;
342 case CODEC_ID_PCM_S16LE_PLANAR:
343 n /= avctx->channels;
344 for(c=0;c<avctx->channels;c++)
345 src2[c] = &src[c*n*2];
346 for(;n>0;n--)
347 for(c=0;c<avctx->channels;c++)
348 *samples++ = bytestream_get_le16(&src2[c]);
349 src = src2[avctx->channels-1];
350 break;
351 case CODEC_ID_PCM_U16LE:
352 DECODE(uint16_t, le16, src, samples, n, 0, 0x8000)
353 break;
354 case CODEC_ID_PCM_U16BE:
355 DECODE(uint16_t, be16, src, samples, n, 0, 0x8000)
356 break;
357 case CODEC_ID_PCM_S8:
358 dstu8= (uint8_t*)samples;
359 for(;n>0;n--) {
360 *dstu8++ = *src++ + 128;
361 }
362 samples= (short*)dstu8;
363 break;
364 #if HAVE_BIGENDIAN
365 case CODEC_ID_PCM_F64LE:
366 DECODE(int64_t, le64, src, samples, n, 0, 0)
367 break;
368 case CODEC_ID_PCM_S32LE:
369 case CODEC_ID_PCM_F32LE:
370 DECODE(int32_t, le32, src, samples, n, 0, 0)
371 break;
372 case CODEC_ID_PCM_S16LE:
373 DECODE(int16_t, le16, src, samples, n, 0, 0)
374 break;
375 case CODEC_ID_PCM_F64BE:
376 case CODEC_ID_PCM_F32BE:
377 case CODEC_ID_PCM_S32BE:
378 case CODEC_ID_PCM_S16BE:
379 #else
380 case CODEC_ID_PCM_F64BE:
381 DECODE(int64_t, be64, src, samples, n, 0, 0)
382 break;
383 case CODEC_ID_PCM_F32BE:
384 case CODEC_ID_PCM_S32BE:
385 DECODE(int32_t, be32, src, samples, n, 0, 0)
386 break;
387 case CODEC_ID_PCM_S16BE:
388 DECODE(int16_t, be16, src, samples, n, 0, 0)
389 break;
390 case CODEC_ID_PCM_F64LE:
391 case CODEC_ID_PCM_F32LE:
392 case CODEC_ID_PCM_S32LE:
393 case CODEC_ID_PCM_S16LE:
394 #endif /* HAVE_BIGENDIAN */
395 case CODEC_ID_PCM_U8:
396 memcpy(samples, src, n*sample_size);
397 src += n*sample_size;
398 samples = (short*)((uint8_t*)data + n*sample_size);
399 break;
400 case CODEC_ID_PCM_ZORK:
401 for(;n>0;n--) {
402 int x= *src++;
403 if(x&128) x-= 128;
404 else x = -x;
405 *samples++ = x << 8;
406 }
407 break;
408 case CODEC_ID_PCM_ALAW:
409 case CODEC_ID_PCM_MULAW:
410 for(;n>0;n--) {
411 *samples++ = s->table[*src++];
412 }
413 break;
414 case CODEC_ID_PCM_DVD:
415 dst_int32_t = data;
416 n /= avctx->channels;
417 switch (avctx->bits_per_coded_sample) {
418 case 20:
419 while (n--) {
420 c = avctx->channels;
421 src8 = src + 4*c;
422 while (c--) {
423 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8 &0xf0) << 8);
424 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++ &0x0f) << 12);
425 }
426 src = src8;
427 }
428 break;
429 case 24:
430 while (n--) {
431 c = avctx->channels;
432 src8 = src + 4*c;
433 while (c--) {
434 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);
435 *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);
436 }
437 src = src8;
438 }
439 break;
440 default:
441 av_log(avctx, AV_LOG_ERROR, "PCM DVD unsupported sample depth\n");
442 return -1;
443 break;
444 }
445 samples = (short *) dst_int32_t;
446 break;
447 case CODEC_ID_PCM_LXF:
448 dst_int32_t = data;
449 n /= avctx->channels;
450 //unpack and de-planerize
451 for (i = 0; i < n; i++) {
452 for (c = 0, src8 = src + i*5; c < avctx->channels; c++, src8 += n*5) {
453 //extract low 20 bits and expand to 32 bits
454 *dst_int32_t++ = (src8[2] << 28) | (src8[1] << 20) | (src8[0] << 12) |
455 ((src8[2] & 0xF) << 8) | src8[1];
456 }
457
458 for (c = 0, src8 = src + i*5; c < avctx->channels; c++, src8 += n*5) {
459 //extract high 20 bits and expand to 32 bits
460 *dst_int32_t++ = (src8[4] << 24) | (src8[3] << 16) |
461 ((src8[2] & 0xF0) << 8) | (src8[4] << 4) | (src8[3] >> 4);
462 }
463 }
464 src += n * avctx->channels * 5;
465 samples = (short *) dst_int32_t;
466 break;
467 default:
468 return -1;
469 }
470 *data_size = (uint8_t *)samples - (uint8_t *)data;
471 return src - buf;
472 }
473
474 #if CONFIG_ENCODERS
475 #define PCM_ENCODER(id_,sample_fmt_,name_,long_name_) \
476 AVCodec ff_ ## name_ ## _encoder = { \
477 .name = #name_, \
478 .type = AVMEDIA_TYPE_AUDIO, \
479 .id = id_, \
480 .init = pcm_encode_init, \
481 .encode = pcm_encode_frame, \
482 .close = pcm_encode_close, \
483 .sample_fmts = (const enum AVSampleFormat[]){sample_fmt_,AV_SAMPLE_FMT_NONE}, \
484 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
485 };
486 #else
487 #define PCM_ENCODER(id,sample_fmt_,name,long_name_)
488 #endif
489
490 #if CONFIG_DECODERS
491 #define PCM_DECODER(id_,sample_fmt_,name_,long_name_) \
492 AVCodec ff_ ## name_ ## _decoder = { \
493 .name = #name_, \
494 .type = AVMEDIA_TYPE_AUDIO, \
495 .id = id_, \
496 .priv_data_size = sizeof(PCMDecode), \
497 .init = pcm_decode_init, \
498 .decode = pcm_decode_frame, \
499 .sample_fmts = (const enum AVSampleFormat[]){sample_fmt_,AV_SAMPLE_FMT_NONE}, \
500 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
501 };
502 #else
503 #define PCM_DECODER(id,sample_fmt_,name,long_name_)
504 #endif
505
506 #define PCM_CODEC(id, sample_fmt_, name, long_name_) \
507 PCM_ENCODER(id,sample_fmt_,name,long_name_) PCM_DECODER(id,sample_fmt_,name,long_name_)
508
509 /* Note: Do not forget to add new entries to the Makefile as well. */
510 PCM_CODEC (CODEC_ID_PCM_ALAW, AV_SAMPLE_FMT_S16, pcm_alaw, "PCM A-law");
511 PCM_DECODER(CODEC_ID_PCM_DVD, AV_SAMPLE_FMT_S32, pcm_dvd, "PCM signed 20|24-bit big-endian");
512 PCM_CODEC (CODEC_ID_PCM_F32BE, AV_SAMPLE_FMT_FLT, pcm_f32be, "PCM 32-bit floating point big-endian");
513 PCM_CODEC (CODEC_ID_PCM_F32LE, AV_SAMPLE_FMT_FLT, pcm_f32le, "PCM 32-bit floating point little-endian");
514 PCM_CODEC (CODEC_ID_PCM_F64BE, AV_SAMPLE_FMT_DBL, pcm_f64be, "PCM 64-bit floating point big-endian");
515 PCM_CODEC (CODEC_ID_PCM_F64LE, AV_SAMPLE_FMT_DBL, pcm_f64le, "PCM 64-bit floating point little-endian");
516 PCM_DECODER(CODEC_ID_PCM_LXF, AV_SAMPLE_FMT_S32, pcm_lxf, "PCM signed 20-bit little-endian planar");
517 PCM_CODEC (CODEC_ID_PCM_MULAW, AV_SAMPLE_FMT_S16, pcm_mulaw, "PCM mu-law");
518 PCM_CODEC (CODEC_ID_PCM_S8, AV_SAMPLE_FMT_U8, pcm_s8, "PCM signed 8-bit");
519 PCM_CODEC (CODEC_ID_PCM_S16BE, AV_SAMPLE_FMT_S16, pcm_s16be, "PCM signed 16-bit big-endian");
520 PCM_CODEC (CODEC_ID_PCM_S16LE, AV_SAMPLE_FMT_S16, pcm_s16le, "PCM signed 16-bit little-endian");
521 PCM_DECODER(CODEC_ID_PCM_S16LE_PLANAR, AV_SAMPLE_FMT_S16, pcm_s16le_planar, "PCM 16-bit little-endian planar");
522 PCM_CODEC (CODEC_ID_PCM_S24BE, AV_SAMPLE_FMT_S32, pcm_s24be, "PCM signed 24-bit big-endian");
523 PCM_CODEC (CODEC_ID_PCM_S24DAUD, AV_SAMPLE_FMT_S16, pcm_s24daud, "PCM D-Cinema audio signed 24-bit");
524 PCM_CODEC (CODEC_ID_PCM_S24LE, AV_SAMPLE_FMT_S32, pcm_s24le, "PCM signed 24-bit little-endian");
525 PCM_CODEC (CODEC_ID_PCM_S32BE, AV_SAMPLE_FMT_S32, pcm_s32be, "PCM signed 32-bit big-endian");
526 PCM_CODEC (CODEC_ID_PCM_S32LE, AV_SAMPLE_FMT_S32, pcm_s32le, "PCM signed 32-bit little-endian");
527 PCM_CODEC (CODEC_ID_PCM_U8, AV_SAMPLE_FMT_U8, pcm_u8, "PCM unsigned 8-bit");
528 PCM_CODEC (CODEC_ID_PCM_U16BE, AV_SAMPLE_FMT_S16, pcm_u16be, "PCM unsigned 16-bit big-endian");
529 PCM_CODEC (CODEC_ID_PCM_U16LE, AV_SAMPLE_FMT_S16, pcm_u16le, "PCM unsigned 16-bit little-endian");
530 PCM_CODEC (CODEC_ID_PCM_U24BE, AV_SAMPLE_FMT_S32, pcm_u24be, "PCM unsigned 24-bit big-endian");
531 PCM_CODEC (CODEC_ID_PCM_U24LE, AV_SAMPLE_FMT_S32, pcm_u24le, "PCM unsigned 24-bit little-endian");
532 PCM_CODEC (CODEC_ID_PCM_U32BE, AV_SAMPLE_FMT_S32, pcm_u32be, "PCM unsigned 32-bit big-endian");
533 PCM_CODEC (CODEC_ID_PCM_U32LE, AV_SAMPLE_FMT_S32, pcm_u32le, "PCM unsigned 32-bit little-endian");
534 PCM_CODEC (CODEC_ID_PCM_ZORK, AV_SAMPLE_FMT_S16, pcm_zork, "PCM Zork");