10l fix
[libav.git] / libavcodec / utils.c
CommitLineData
de6d9b64
FB
1/*
2 * utils for libavcodec
ff4ec49e 3 * Copyright (c) 2001 Fabrice Bellard.
de6d9b64 4 *
ff4ec49e
FB
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
de6d9b64 9 *
ff4ec49e 10 * This library is distributed in the hope that it will be useful,
de6d9b64 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
ff4ec49e
FB
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
de6d9b64 14 *
ff4ec49e
FB
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
de6d9b64 18 */
de6d9b64 19#include "avcodec.h"
3123dd79 20#include "dsputil.h"
1c2a8c7f 21#include "mpegvideo.h"
de6d9b64 22
18f77016 23void *av_mallocz(unsigned int size)
3123dd79
FB
24{
25 void *ptr;
26 ptr = av_malloc(size);
27 if (!ptr)
28 return NULL;
29 memset(ptr, 0, size);
30 return ptr;
31}
32
4d7a0a05
FB
33/* cannot call it directly because of 'void **' casting is not automatic */
34void __av_freep(void **ptr)
35{
36 av_free(*ptr);
37 *ptr = NULL;
38}
39
de6d9b64
FB
40/* encoder management */
41AVCodec *first_avcodec;
42
43void register_avcodec(AVCodec *format)
44{
45 AVCodec **p;
46 p = &first_avcodec;
47 while (*p != NULL) p = &(*p)->next;
48 *p = format;
49 format->next = NULL;
50}
51
a949d72e 52void avcodec_get_context_defaults(AVCodecContext *s){
e8b62df6
MN
53 s->bit_rate= 800*1000;
54 s->bit_rate_tolerance= s->bit_rate*10;
a949d72e
MN
55 s->qmin= 2;
56 s->qmax= 31;
57 s->rc_eq= "tex^qComp";
58 s->qcompress= 0.5;
e8b62df6
MN
59 s->max_qdiff= 3;
60 s->b_quant_factor=1.25;
61 s->b_quant_offset=1.25;
b3a391e8 62 s->i_quant_factor=-0.8;
e8b62df6 63 s->i_quant_offset=0.0;
4d2858de 64 s->error_concealment= 3;
8d0e42ca 65 s->error_resilience= 1;
4d2858de 66 s->workaround_bugs= FF_BUG_AUTODETECT;
8d0e42ca
MN
67 s->frame_rate = 25 * FRAME_RATE_BASE;
68 s->gop_size= 50;
69 s->me_method= ME_EPZS;
a949d72e
MN
70}
71
72/**
73 * allocates a AVCodecContext and set it to defaults.
74 * this can be deallocated by simply calling free()
75 */
7ffbb60e 76AVCodecContext *avcodec_alloc_context(void){
a949d72e
MN
77 AVCodecContext *avctx= av_mallocz(sizeof(AVCodecContext));
78
79 if(avctx==NULL) return NULL;
80
81 avcodec_get_context_defaults(avctx);
82
83 return avctx;
84}
85
de6d9b64
FB
86int avcodec_open(AVCodecContext *avctx, AVCodec *codec)
87{
88 int ret;
89
90 avctx->codec = codec;
91 avctx->frame_number = 0;
0edf8a7a
PG
92 if (codec->priv_data_size > 0) {
93 avctx->priv_data = av_mallocz(codec->priv_data_size);
94 if (!avctx->priv_data)
95 return -ENOMEM;
96 } else {
97 avctx->priv_data = NULL;
98 }
de6d9b64
FB
99 ret = avctx->codec->init(avctx);
100 if (ret < 0) {
3123dd79 101 av_freep(&avctx->priv_data);
de6d9b64
FB
102 return ret;
103 }
104 return 0;
105}
106
107int avcodec_encode_audio(AVCodecContext *avctx, UINT8 *buf, int buf_size,
108 const short *samples)
109{
110 int ret;
111
112 ret = avctx->codec->encode(avctx, buf, buf_size, (void *)samples);
113 avctx->frame_number++;
114 return ret;
115}
116
117int avcodec_encode_video(AVCodecContext *avctx, UINT8 *buf, int buf_size,
118 const AVPicture *pict)
119{
120 int ret;
121
122 ret = avctx->codec->encode(avctx, buf, buf_size, (void *)pict);
6bb925f4
MN
123
124 emms_c(); //needed to avoid a emms_c() call before every return;
125
de6d9b64
FB
126 avctx->frame_number++;
127 return ret;
128}
129
130/* decode a frame. return -1 if error, otherwise return the number of
131 bytes used. If no frame could be decompressed, *got_picture_ptr is
132 zero. Otherwise, it is non zero */
133int avcodec_decode_video(AVCodecContext *avctx, AVPicture *picture,
134 int *got_picture_ptr,
135 UINT8 *buf, int buf_size)
136{
137 int ret;
138
139 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
140 buf, buf_size);
6bb925f4
MN
141
142 emms_c(); //needed to avoid a emms_c() call before every return;
143
1cb0edb4
J
144 if (*got_picture_ptr)
145 avctx->frame_number++;
de6d9b64
FB
146 return ret;
147}
148
149/* decode an audio frame. return -1 if error, otherwise return the
150 *number of bytes used. If no frame could be decompressed,
151 *frame_size_ptr is zero. Otherwise, it is the decompressed frame
152 *size in BYTES. */
153int avcodec_decode_audio(AVCodecContext *avctx, INT16 *samples,
154 int *frame_size_ptr,
155 UINT8 *buf, int buf_size)
156{
157 int ret;
158
159 ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
160 buf, buf_size);
161 avctx->frame_number++;
162 return ret;
163}
164
165int avcodec_close(AVCodecContext *avctx)
166{
167 if (avctx->codec->close)
168 avctx->codec->close(avctx);
3123dd79 169 av_freep(&avctx->priv_data);
de6d9b64
FB
170 avctx->codec = NULL;
171 return 0;
172}
173
174AVCodec *avcodec_find_encoder(enum CodecID id)
175{
176 AVCodec *p;
177 p = first_avcodec;
178 while (p) {
179 if (p->encode != NULL && p->id == id)
180 return p;
181 p = p->next;
182 }
183 return NULL;
184}
185
98f3b098
A
186AVCodec *avcodec_find_encoder_by_name(const char *name)
187{
188 AVCodec *p;
189 p = first_avcodec;
190 while (p) {
191 if (p->encode != NULL && strcmp(name,p->name) == 0)
192 return p;
193 p = p->next;
194 }
195 return NULL;
196}
197
de6d9b64
FB
198AVCodec *avcodec_find_decoder(enum CodecID id)
199{
200 AVCodec *p;
201 p = first_avcodec;
202 while (p) {
203 if (p->decode != NULL && p->id == id)
204 return p;
205 p = p->next;
206 }
207 return NULL;
208}
209
210AVCodec *avcodec_find_decoder_by_name(const char *name)
211{
212 AVCodec *p;
213 p = first_avcodec;
214 while (p) {
215 if (p->decode != NULL && strcmp(name,p->name) == 0)
216 return p;
217 p = p->next;
218 }
219 return NULL;
220}
221
222AVCodec *avcodec_find(enum CodecID id)
223{
224 AVCodec *p;
225 p = first_avcodec;
226 while (p) {
227 if (p->id == id)
228 return p;
229 p = p->next;
230 }
231 return NULL;
232}
233
cf087595
FB
234const char *pix_fmt_str[] = {
235 "yuv420p",
236 "yuv422",
237 "rgb24",
238 "bgr24",
239 "yuv422p",
240 "yuv444p",
b71472eb
PG
241 "rgba32",
242 "bgra32",
a5e88058
FB
243 "yuv410p",
244 "yuv411p",
cf087595 245};
a5e88058 246
de6d9b64
FB
247void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
248{
249 const char *codec_name;
250 AVCodec *p;
251 char buf1[32];
623563c0 252 char channels_str[100];
a96b68b7 253 int bitrate;
de6d9b64
FB
254
255 if (encode)
256 p = avcodec_find_encoder(enc->codec_id);
257 else
258 p = avcodec_find_decoder(enc->codec_id);
259
260 if (p) {
261 codec_name = p->name;
262 } else if (enc->codec_name[0] != '\0') {
263 codec_name = enc->codec_name;
264 } else {
265 /* output avi tags */
266 if (enc->codec_type == CODEC_TYPE_VIDEO) {
267 snprintf(buf1, sizeof(buf1), "%c%c%c%c",
268 enc->codec_tag & 0xff,
269 (enc->codec_tag >> 8) & 0xff,
270 (enc->codec_tag >> 16) & 0xff,
271 (enc->codec_tag >> 24) & 0xff);
272 } else {
273 snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
274 }
275 codec_name = buf1;
276 }
277
278 switch(enc->codec_type) {
279 case CODEC_TYPE_VIDEO:
280 snprintf(buf, buf_size,
281 "Video: %s%s",
282 codec_name, enc->flags & CODEC_FLAG_HQ ? " (hq)" : "");
cf087595
FB
283 if (enc->codec_id == CODEC_ID_RAWVIDEO) {
284 snprintf(buf + strlen(buf), buf_size - strlen(buf),
285 ", %s",
286 pix_fmt_str[enc->pix_fmt]);
287 }
de6d9b64
FB
288 if (enc->width) {
289 snprintf(buf + strlen(buf), buf_size - strlen(buf),
290 ", %dx%d, %0.2f fps",
291 enc->width, enc->height,
292 (float)enc->frame_rate / FRAME_RATE_BASE);
293 }
4bfad535
FB
294 if (encode) {
295 snprintf(buf + strlen(buf), buf_size - strlen(buf),
296 ", q=%d-%d", enc->qmin, enc->qmax);
297 }
a96b68b7 298 bitrate = enc->bit_rate;
de6d9b64
FB
299 break;
300 case CODEC_TYPE_AUDIO:
301 snprintf(buf, buf_size,
302 "Audio: %s",
303 codec_name);
e0d2714a
J
304 switch (enc->channels) {
305 case 1:
623563c0 306 strcpy(channels_str, "mono");
e0d2714a
J
307 break;
308 case 2:
623563c0 309 strcpy(channels_str, "stereo");
e0d2714a
J
310 break;
311 case 6:
623563c0 312 strcpy(channels_str, "5:1");
e0d2714a
J
313 break;
314 default:
315 sprintf(channels_str, "%d channels", enc->channels);
316 break;
317 }
de6d9b64
FB
318 if (enc->sample_rate) {
319 snprintf(buf + strlen(buf), buf_size - strlen(buf),
320 ", %d Hz, %s",
321 enc->sample_rate,
e0d2714a 322 channels_str);
de6d9b64 323 }
e0d2714a 324
a96b68b7
FB
325 /* for PCM codecs, compute bitrate directly */
326 switch(enc->codec_id) {
327 case CODEC_ID_PCM_S16LE:
328 case CODEC_ID_PCM_S16BE:
329 case CODEC_ID_PCM_U16LE:
330 case CODEC_ID_PCM_U16BE:
a190b7e9 331 bitrate = enc->sample_rate * enc->channels * 16;
a96b68b7
FB
332 break;
333 case CODEC_ID_PCM_S8:
334 case CODEC_ID_PCM_U8:
335 case CODEC_ID_PCM_ALAW:
336 case CODEC_ID_PCM_MULAW:
a190b7e9 337 bitrate = enc->sample_rate * enc->channels * 8;
a96b68b7
FB
338 break;
339 default:
340 bitrate = enc->bit_rate;
341 break;
342 }
de6d9b64
FB
343 break;
344 default:
b71472eb 345 av_abort();
de6d9b64 346 }
4bfad535
FB
347 if (encode) {
348 if (enc->flags & CODEC_FLAG_PASS1)
349 snprintf(buf + strlen(buf), buf_size - strlen(buf),
350 ", pass 1");
351 if (enc->flags & CODEC_FLAG_PASS2)
352 snprintf(buf + strlen(buf), buf_size - strlen(buf),
353 ", pass 2");
354 }
a96b68b7 355 if (bitrate != 0) {
de6d9b64 356 snprintf(buf + strlen(buf), buf_size - strlen(buf),
a96b68b7 357 ", %d kb/s", bitrate / 1000);
de6d9b64
FB
358 }
359}
360
cf087595
FB
361/* Picture field are filled with 'ptr' addresses */
362void avpicture_fill(AVPicture *picture, UINT8 *ptr,
363 int pix_fmt, int width, int height)
364{
365 int size;
366
367 size = width * height;
368 switch(pix_fmt) {
369 case PIX_FMT_YUV420P:
370 picture->data[0] = ptr;
371 picture->data[1] = picture->data[0] + size;
372 picture->data[2] = picture->data[1] + size / 4;
373 picture->linesize[0] = width;
374 picture->linesize[1] = width / 2;
375 picture->linesize[2] = width / 2;
376 break;
377 case PIX_FMT_YUV422P:
378 picture->data[0] = ptr;
379 picture->data[1] = picture->data[0] + size;
380 picture->data[2] = picture->data[1] + size / 2;
381 picture->linesize[0] = width;
382 picture->linesize[1] = width / 2;
383 picture->linesize[2] = width / 2;
384 break;
385 case PIX_FMT_YUV444P:
386 picture->data[0] = ptr;
387 picture->data[1] = picture->data[0] + size;
388 picture->data[2] = picture->data[1] + size;
389 picture->linesize[0] = width;
390 picture->linesize[1] = width;
391 picture->linesize[2] = width;
392 break;
393 case PIX_FMT_RGB24:
394 case PIX_FMT_BGR24:
395 picture->data[0] = ptr;
396 picture->data[1] = NULL;
397 picture->data[2] = NULL;
398 picture->linesize[0] = width * 3;
399 break;
b71472eb
PG
400 case PIX_FMT_RGBA32:
401 case PIX_FMT_BGRA32:
402 picture->data[0] = ptr;
403 picture->data[1] = NULL;
404 picture->data[2] = NULL;
405 picture->linesize[0] = width * 4;
406 break;
cf087595
FB
407 case PIX_FMT_YUV422:
408 picture->data[0] = ptr;
409 picture->data[1] = NULL;
410 picture->data[2] = NULL;
411 picture->linesize[0] = width * 2;
412 break;
413 default:
414 picture->data[0] = NULL;
415 picture->data[1] = NULL;
416 picture->data[2] = NULL;
417 break;
418 }
419}
420
421int avpicture_get_size(int pix_fmt, int width, int height)
422{
423 int size;
424
425 size = width * height;
426 switch(pix_fmt) {
427 case PIX_FMT_YUV420P:
428 size = (size * 3) / 2;
429 break;
430 case PIX_FMT_YUV422P:
431 size = (size * 2);
432 break;
433 case PIX_FMT_YUV444P:
434 size = (size * 3);
435 break;
436 case PIX_FMT_RGB24:
437 case PIX_FMT_BGR24:
438 size = (size * 3);
439 break;
b71472eb
PG
440 case PIX_FMT_RGBA32:
441 case PIX_FMT_BGRA32:
442 size = (size * 4);
443 break;
cf087595
FB
444 case PIX_FMT_YUV422:
445 size = (size * 2);
446 break;
447 default:
448 size = -1;
449 break;
450 }
451 return size;
452}
453
156e5023
NK
454unsigned avcodec_version( void )
455{
456 return LIBAVCODEC_VERSION_INT;
457}
cf087595 458
8bceb6af
NK
459unsigned avcodec_build( void )
460{
461 return LIBAVCODEC_BUILD;
462}
463
de6d9b64
FB
464/* must be called before any other functions */
465void avcodec_init(void)
466{
0344cd0a
AB
467 static int inited = 0;
468
469 if (inited != 0)
470 return;
471 inited = 1;
472
c6af86c2 473 //dsputil_init();
de6d9b64
FB
474}
475
1c2a8c7f
MN
476/* this should be called after seeking and before trying to decode the next frame */
477void avcodec_flush_buffers(AVCodecContext *avctx)
478{
479 MpegEncContext *s = avctx->priv_data;
480 s->num_available_buffers=0;
481}
482
483
cd4af68a 484static int raw_encode_init(AVCodecContext *s)
de6d9b64
FB
485{
486 return 0;
487}
488
cd4af68a
ZK
489static int raw_decode_frame(AVCodecContext *avctx,
490 void *data, int *data_size,
491 UINT8 *buf, int buf_size)
de6d9b64
FB
492{
493 return -1;
494}
495
cd4af68a
ZK
496static int raw_encode_frame(AVCodecContext *avctx,
497 unsigned char *frame, int buf_size, void *data)
de6d9b64
FB
498{
499 return -1;
500}
501
de6d9b64
FB
502AVCodec rawvideo_codec = {
503 "rawvideo",
504 CODEC_TYPE_VIDEO,
505 CODEC_ID_RAWVIDEO,
506 0,
cd4af68a
ZK
507 raw_encode_init,
508 raw_encode_frame,
de6d9b64 509 NULL,
cd4af68a 510 raw_decode_frame,
de6d9b64 511};