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