3 * Copyright (c) 2001 Fabrice Bellard.
4 * Copyright (c) 2003 Michel Bardiaux for the av_log API
5 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
7 * This library 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 of the License, or (at your option) any later version.
12 * This library 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 this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 #include "mpegvideo.h"
34 const uint8_t ff_sqrt_tab[128]={
35 0, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5,
36 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
37 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
38 9, 9, 9, 9,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,11,11,11,11,11,11,11
41 const uint8_t ff_log2_tab[256]={
42 0,0,1,1,2,2,2,2,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
43 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
44 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
45 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
46 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
47 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
48 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
49 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7
52 const uint8_t ff_reverse[256]={
53 0x00,0x80,0x40,0xC0,0x20,0xA0,0x60,0xE0,0x10,0x90,0x50,0xD0,0x30,0xB0,0x70,0xF0,
54 0x08,0x88,0x48,0xC8,0x28,0xA8,0x68,0xE8,0x18,0x98,0x58,0xD8,0x38,0xB8,0x78,0xF8,
55 0x04,0x84,0x44,0xC4,0x24,0xA4,0x64,0xE4,0x14,0x94,0x54,0xD4,0x34,0xB4,0x74,0xF4,
56 0x0C,0x8C,0x4C,0xCC,0x2C,0xAC,0x6C,0xEC,0x1C,0x9C,0x5C,0xDC,0x3C,0xBC,0x7C,0xFC,
57 0x02,0x82,0x42,0xC2,0x22,0xA2,0x62,0xE2,0x12,0x92,0x52,0xD2,0x32,0xB2,0x72,0xF2,
58 0x0A,0x8A,0x4A,0xCA,0x2A,0xAA,0x6A,0xEA,0x1A,0x9A,0x5A,0xDA,0x3A,0xBA,0x7A,0xFA,
59 0x06,0x86,0x46,0xC6,0x26,0xA6,0x66,0xE6,0x16,0x96,0x56,0xD6,0x36,0xB6,0x76,0xF6,
60 0x0E,0x8E,0x4E,0xCE,0x2E,0xAE,0x6E,0xEE,0x1E,0x9E,0x5E,0xDE,0x3E,0xBE,0x7E,0xFE,
61 0x01,0x81,0x41,0xC1,0x21,0xA1,0x61,0xE1,0x11,0x91,0x51,0xD1,0x31,0xB1,0x71,0xF1,
62 0x09,0x89,0x49,0xC9,0x29,0xA9,0x69,0xE9,0x19,0x99,0x59,0xD9,0x39,0xB9,0x79,0xF9,
63 0x05,0x85,0x45,0xC5,0x25,0xA5,0x65,0xE5,0x15,0x95,0x55,0xD5,0x35,0xB5,0x75,0xF5,
64 0x0D,0x8D,0x4D,0xCD,0x2D,0xAD,0x6D,0xED,0x1D,0x9D,0x5D,0xDD,0x3D,0xBD,0x7D,0xFD,
65 0x03,0x83,0x43,0xC3,0x23,0xA3,0x63,0xE3,0x13,0x93,0x53,0xD3,0x33,0xB3,0x73,0xF3,
66 0x0B,0x8B,0x4B,0xCB,0x2B,0xAB,0x6B,0xEB,0x1B,0x9B,0x5B,0xDB,0x3B,0xBB,0x7B,0xFB,
67 0x07,0x87,0x47,0xC7,0x27,0xA7,0x67,0xE7,0x17,0x97,0x57,0xD7,0x37,0xB7,0x77,0xF7,
68 0x0F,0x8F,0x4F,0xCF,0x2F,0xAF,0x6F,0xEF,0x1F,0x9F,0x5F,0xDF,0x3F,0xBF,0x7F,0xFF,
71 void avcodec_default_free_buffers(AVCodecContext *s);
73 void *av_mallocz(unsigned int size)
77 ptr = av_malloc(size);
84 char *av_strdup(const char *s)
97 * realloc which does nothing if the block is large enough
99 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
104 *size= FFMAX(17*min_size/16 + 32, min_size);
106 return av_realloc(ptr, *size);
110 static unsigned int last_static = 0;
111 static unsigned int allocated_static = 0;
112 static void** array_static = NULL;
115 * allocation of static arrays - do not use for normal allocation.
117 void *av_mallocz_static(unsigned int size)
119 void *ptr = av_mallocz(size);
122 array_static =av_fast_realloc(array_static, &allocated_static, sizeof(void*)*(last_static+1));
125 array_static[last_static++] = ptr;
132 * same as above, but does realloc
135 void *av_realloc_static(void *ptr, unsigned int size)
139 return av_mallocz_static(size);
140 /* Look for the old ptr */
141 for(i = 0; i < last_static; i++) {
142 if(array_static[i] == ptr) {
143 array_static[i] = av_realloc(array_static[i], size);
144 return array_static[i];
152 * free all static arrays and reset pointers to 0.
154 void av_free_static(void)
157 av_freep(&array_static[--last_static]);
159 av_freep(&array_static);
163 * Frees memory and sets the pointer to NULL.
164 * @param arg pointer to the pointer which should be freed
166 void av_freep(void *arg)
168 void **ptr= (void**)arg;
173 /* encoder management */
174 AVCodec *first_avcodec = NULL;
176 void register_avcodec(AVCodec *format)
180 while (*p != NULL) p = &(*p)->next;
185 void avcodec_set_dimensions(AVCodecContext *s, int width, int height){
186 s->coded_width = width;
187 s->coded_height= height;
188 s->width = -((-width )>>s->lowres);
189 s->height= -((-height)>>s->lowres);
192 typedef struct InternalBuffer{
199 #define INTERNAL_BUFFER_SIZE 32
201 #define ALIGN(x, a) (((x)+(a)-1)&~((a)-1))
203 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
208 case PIX_FMT_YUV420P:
210 case PIX_FMT_UYVY422:
211 case PIX_FMT_YUV422P:
212 case PIX_FMT_YUV444P:
214 case PIX_FMT_YUVJ420P:
215 case PIX_FMT_YUVJ422P:
216 case PIX_FMT_YUVJ444P:
217 w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
220 case PIX_FMT_YUV411P:
221 case PIX_FMT_UYVY411:
225 case PIX_FMT_YUV410P:
226 if(s->codec_id == CODEC_ID_SVQ1){
231 if(s->codec_id == CODEC_ID_RPZA){
236 if(s->codec_id == CODEC_ID_SMC){
242 if((s->codec_id == CODEC_ID_MSZH) || (s->codec_id == CODEC_ID_ZLIB)){
253 *width = ALIGN(*width , w_align);
254 *height= ALIGN(*height, h_align);
257 int avcodec_check_dimensions(void *av_log_ctx, unsigned int w, unsigned int h){
258 if((int)w>0 && (int)h>0 && (w+128)*(uint64_t)(h+128) < INT_MAX/4)
261 av_log(av_log_ctx, AV_LOG_ERROR, "picture size invalid (%ux%u)\n", w, h);
265 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
272 assert(pic->data[0]==NULL);
273 assert(INTERNAL_BUFFER_SIZE > s->internal_buffer_count);
275 if(avcodec_check_dimensions(s,w,h))
278 if(s->internal_buffer==NULL){
279 s->internal_buffer= av_mallocz(INTERNAL_BUFFER_SIZE*sizeof(InternalBuffer));
282 s->internal_buffer= av_fast_realloc(
284 &s->internal_buffer_size,
285 sizeof(InternalBuffer)*FFMAX(99, s->internal_buffer_count+1)/*FIXME*/
289 buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
290 picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE-1]).last_pic_num; //FIXME ugly hack
294 pic->age= *picture_number - buf->last_pic_num;
295 buf->last_pic_num= *picture_number;
297 int h_chroma_shift, v_chroma_shift;
300 avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
306 case PIX_FMT_UYVY422:
320 avcodec_align_dimensions(s, &w, &h);
322 if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
327 buf->last_pic_num= -256*256*256*64;
330 const int h_shift= i==0 ? 0 : h_chroma_shift;
331 const int v_shift= i==0 ? 0 : v_chroma_shift;
333 //FIXME next ensures that linesize= 2^x uvlinesize, thats needed because some MC code assumes it
334 buf->linesize[i]= ALIGN(pixel_size*w>>h_shift, STRIDE_ALIGN<<(h_chroma_shift-h_shift));
336 buf->base[i]= av_malloc((buf->linesize[i]*h>>v_shift)+16); //FIXME 16
337 if(buf->base[i]==NULL) return -1;
338 memset(buf->base[i], 128, buf->linesize[i]*h>>v_shift);
340 if(s->flags&CODEC_FLAG_EMU_EDGE)
341 buf->data[i] = buf->base[i];
343 buf->data[i] = buf->base[i] + ALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), STRIDE_ALIGN);
345 pic->age= 256*256*256*64;
347 pic->type= FF_BUFFER_TYPE_INTERNAL;
350 pic->base[i]= buf->base[i];
351 pic->data[i]= buf->data[i];
352 pic->linesize[i]= buf->linesize[i];
354 s->internal_buffer_count++;
359 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
361 InternalBuffer *buf, *last, temp;
363 assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
364 assert(s->internal_buffer_count);
366 buf = NULL; /* avoids warning */
367 for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
368 buf= &((InternalBuffer*)s->internal_buffer)[i];
369 if(buf->data[0] == pic->data[0])
372 assert(i < s->internal_buffer_count);
373 s->internal_buffer_count--;
374 last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
382 // pic->base[i]=NULL;
384 //printf("R%X\n", pic->opaque);
387 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
391 /* If no picture return a new buffer */
392 if(pic->data[0] == NULL) {
393 /* We will copy from buffer, so must be readable */
394 pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
395 return s->get_buffer(s, pic);
398 /* If internal buffer type return the same buffer */
399 if(pic->type == FF_BUFFER_TYPE_INTERNAL)
403 * Not internal type and reget_buffer not overridden, emulate cr buffer
406 for(i = 0; i < 4; i++)
407 pic->data[i] = pic->base[i] = NULL;
409 /* Allocate new frame */
410 if (s->get_buffer(s, pic))
412 /* Copy image data from old buffer to new buffer */
413 img_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
415 s->release_buffer(s, &temp_pic); // Release old frame
419 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count){
422 for(i=0; i<count; i++){
423 int r= func(c, arg[i]);
429 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt){
433 static const char* context_to_name(void* ptr) {
434 AVCodecContext *avc= ptr;
436 if(avc && avc->codec && avc->codec->name)
437 return avc->codec->name;
442 static AVClass av_codec_context_class = { "AVCodecContext", context_to_name };
444 void avcodec_get_context_defaults(AVCodecContext *s){
445 memset(s, 0, sizeof(AVCodecContext));
447 s->av_class= &av_codec_context_class;
448 s->bit_rate= 800*1000;
449 s->bit_rate_tolerance= s->bit_rate*10;
452 s->mb_lmin= FF_QP2LAMBDA * 2;
453 s->mb_lmax= FF_QP2LAMBDA * 31;
454 s->rc_eq= "tex^qComp";
457 s->b_quant_factor=1.25;
458 s->b_quant_offset=1.25;
459 s->i_quant_factor=-0.8;
460 s->i_quant_offset=0.0;
461 s->error_concealment= 3;
462 s->error_resilience= 1;
463 s->workaround_bugs= FF_BUG_AUTODETECT;
464 s->time_base= (AVRational){0,1};
466 s->me_method= ME_EPZS;
467 s->get_buffer= avcodec_default_get_buffer;
468 s->release_buffer= avcodec_default_release_buffer;
469 s->get_format= avcodec_default_get_format;
470 s->execute= avcodec_default_execute;
472 s->me_subpel_quality=8;
473 s->lmin= FF_QP2LAMBDA * s->qmin;
474 s->lmax= FF_QP2LAMBDA * s->qmax;
475 s->sample_aspect_ratio= (AVRational){0,1};
476 s->ildct_cmp= FF_CMP_VSAD;
477 s->profile= FF_PROFILE_UNKNOWN;
478 s->level= FF_LEVEL_UNKNOWN;
479 s->me_penalty_compensation= 256;
480 s->pix_fmt= PIX_FMT_NONE;
482 s->intra_quant_bias= FF_DEFAULT_QUANT_BIAS;
483 s->inter_quant_bias= FF_DEFAULT_QUANT_BIAS;
485 s->reget_buffer= avcodec_default_reget_buffer;
489 * allocates a AVCodecContext and set it to defaults.
490 * this can be deallocated by simply calling free()
492 AVCodecContext *avcodec_alloc_context(void){
493 AVCodecContext *avctx= av_malloc(sizeof(AVCodecContext));
495 if(avctx==NULL) return NULL;
497 avcodec_get_context_defaults(avctx);
502 void avcodec_get_frame_defaults(AVFrame *pic){
503 memset(pic, 0, sizeof(AVFrame));
505 pic->pts= AV_NOPTS_VALUE;
510 * allocates a AVPFrame and set it to defaults.
511 * this can be deallocated by simply calling free()
513 AVFrame *avcodec_alloc_frame(void){
514 AVFrame *pic= av_malloc(sizeof(AVFrame));
516 if(pic==NULL) return NULL;
518 avcodec_get_frame_defaults(pic);
523 int avcodec_open(AVCodecContext *avctx, AVCodec *codec)
530 avctx->codec = codec;
531 avctx->codec_id = codec->id;
532 avctx->frame_number = 0;
533 if (codec->priv_data_size > 0) {
534 avctx->priv_data = av_mallocz(codec->priv_data_size);
535 if (!avctx->priv_data)
538 avctx->priv_data = NULL;
541 if(avctx->coded_width && avctx->coded_height)
542 avcodec_set_dimensions(avctx, avctx->coded_width, avctx->coded_height);
543 else if(avctx->width && avctx->height)
544 avcodec_set_dimensions(avctx, avctx->width, avctx->height);
546 if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height)){
547 av_freep(&avctx->priv_data);
551 ret = avctx->codec->init(avctx);
553 av_freep(&avctx->priv_data);
559 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
560 const short *samples)
562 if(buf_size < FF_MIN_BUFFER_SIZE && 0){
563 av_log(avctx, AV_LOG_ERROR, "buffer smaller then minimum size\n");
566 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
567 int ret = avctx->codec->encode(avctx, buf, buf_size, (void *)samples);
568 avctx->frame_number++;
574 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
577 if(buf_size < FF_MIN_BUFFER_SIZE){
578 av_log(avctx, AV_LOG_ERROR, "buffer smaller then minimum size\n");
581 if(avcodec_check_dimensions(avctx,avctx->width,avctx->height))
583 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
584 int ret = avctx->codec->encode(avctx, buf, buf_size, (void *)pict);
585 avctx->frame_number++;
586 emms_c(); //needed to avoid a emms_c() call before every return;
595 * @param buf bitstream buffer, must be FF_INPUT_BUFFER_PADDING_SIZE larger then the actual read bytes
596 * because some optimized bitstream readers read 32 or 64 bit at once and could read over the end
597 * @param buf_size the size of the buffer in bytes
598 * @param got_picture_ptr zero if no frame could be decompressed, Otherwise, it is non zero
599 * @return -1 if error, otherwise return the number of
602 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
603 int *got_picture_ptr,
604 uint8_t *buf, int buf_size)
609 if((avctx->coded_width||avctx->coded_height) && avcodec_check_dimensions(avctx,avctx->coded_width,avctx->coded_height))
611 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || buf_size){
612 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
615 emms_c(); //needed to avoid a emms_c() call before every return;
617 if (*got_picture_ptr)
618 avctx->frame_number++;
625 /* decode an audio frame. return -1 if error, otherwise return the
626 *number of bytes used. If no frame could be decompressed,
627 *frame_size_ptr is zero. Otherwise, it is the decompressed frame
629 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
631 uint8_t *buf, int buf_size)
636 ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
638 avctx->frame_number++;
642 int avcodec_close(AVCodecContext *avctx)
644 if (avctx->codec->close)
645 avctx->codec->close(avctx);
646 avcodec_default_free_buffers(avctx);
647 av_freep(&avctx->priv_data);
652 AVCodec *avcodec_find_encoder(enum CodecID id)
657 if (p->encode != NULL && p->id == id)
664 AVCodec *avcodec_find_encoder_by_name(const char *name)
669 if (p->encode != NULL && strcmp(name,p->name) == 0)
676 AVCodec *avcodec_find_decoder(enum CodecID id)
681 if (p->decode != NULL && p->id == id)
688 AVCodec *avcodec_find_decoder_by_name(const char *name)
693 if (p->decode != NULL && strcmp(name,p->name) == 0)
700 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
702 const char *codec_name;
705 char channels_str[100];
709 p = avcodec_find_encoder(enc->codec_id);
711 p = avcodec_find_decoder(enc->codec_id);
714 codec_name = p->name;
715 if (!encode && enc->codec_id == CODEC_ID_MP3) {
716 if (enc->sub_id == 2)
718 else if (enc->sub_id == 1)
721 } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
722 /* fake mpeg2 transport stream codec (currently not
724 codec_name = "mpeg2ts";
725 } else if (enc->codec_name[0] != '\0') {
726 codec_name = enc->codec_name;
728 /* output avi tags */
729 if (enc->codec_type == CODEC_TYPE_VIDEO) {
730 snprintf(buf1, sizeof(buf1), "%c%c%c%c",
731 enc->codec_tag & 0xff,
732 (enc->codec_tag >> 8) & 0xff,
733 (enc->codec_tag >> 16) & 0xff,
734 (enc->codec_tag >> 24) & 0xff);
736 snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
741 switch(enc->codec_type) {
742 case CODEC_TYPE_VIDEO:
743 snprintf(buf, buf_size,
745 codec_name, enc->mb_decision ? " (hq)" : "");
746 if (enc->pix_fmt != PIX_FMT_NONE) {
747 snprintf(buf + strlen(buf), buf_size - strlen(buf),
749 avcodec_get_pix_fmt_name(enc->pix_fmt));
752 snprintf(buf + strlen(buf), buf_size - strlen(buf),
753 ", %dx%d, %0.2f fps",
754 enc->width, enc->height,
755 1/av_q2d(enc->time_base));
758 snprintf(buf + strlen(buf), buf_size - strlen(buf),
759 ", q=%d-%d", enc->qmin, enc->qmax);
761 bitrate = enc->bit_rate;
763 case CODEC_TYPE_AUDIO:
764 snprintf(buf, buf_size,
767 switch (enc->channels) {
769 strcpy(channels_str, "mono");
772 strcpy(channels_str, "stereo");
775 strcpy(channels_str, "5:1");
778 snprintf(channels_str, sizeof(channels_str), "%d channels", enc->channels);
781 if (enc->sample_rate) {
782 snprintf(buf + strlen(buf), buf_size - strlen(buf),
788 /* for PCM codecs, compute bitrate directly */
789 switch(enc->codec_id) {
790 case CODEC_ID_PCM_S16LE:
791 case CODEC_ID_PCM_S16BE:
792 case CODEC_ID_PCM_U16LE:
793 case CODEC_ID_PCM_U16BE:
794 bitrate = enc->sample_rate * enc->channels * 16;
796 case CODEC_ID_PCM_S8:
797 case CODEC_ID_PCM_U8:
798 case CODEC_ID_PCM_ALAW:
799 case CODEC_ID_PCM_MULAW:
800 bitrate = enc->sample_rate * enc->channels * 8;
803 bitrate = enc->bit_rate;
807 case CODEC_TYPE_DATA:
808 snprintf(buf, buf_size, "Data: %s", codec_name);
809 bitrate = enc->bit_rate;
812 snprintf(buf, buf_size, "Invalid Codec type %d", enc->codec_type);
816 if (enc->flags & CODEC_FLAG_PASS1)
817 snprintf(buf + strlen(buf), buf_size - strlen(buf),
819 if (enc->flags & CODEC_FLAG_PASS2)
820 snprintf(buf + strlen(buf), buf_size - strlen(buf),
824 snprintf(buf + strlen(buf), buf_size - strlen(buf),
825 ", %d kb/s", bitrate / 1000);
829 unsigned avcodec_version( void )
831 return LIBAVCODEC_VERSION_INT;
834 unsigned avcodec_build( void )
836 return LIBAVCODEC_BUILD;
839 /* must be called before any other functions */
840 void avcodec_init(void)
842 static int inited = 0;
848 dsputil_static_init();
852 * Flush buffers, should be called when seeking or when swicthing to a different stream.
854 void avcodec_flush_buffers(AVCodecContext *avctx)
856 if(avctx->codec->flush)
857 avctx->codec->flush(avctx);
860 void avcodec_default_free_buffers(AVCodecContext *s){
863 if(s->internal_buffer==NULL) return;
865 for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
866 InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
868 av_freep(&buf->base[j]);
872 av_freep(&s->internal_buffer);
874 s->internal_buffer_count=0;
877 char av_get_pict_type_char(int pict_type){
879 case I_TYPE: return 'I';
880 case P_TYPE: return 'P';
881 case B_TYPE: return 'B';
882 case S_TYPE: return 'S';
883 case SI_TYPE:return 'i';
884 case SP_TYPE:return 'p';
889 int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max){
890 AVRational a0={0,1}, a1={1,0};
891 int sign= (nom<0) ^ (den<0);
892 int64_t gcd= ff_gcd(ABS(nom), ABS(den));
896 if(nom<=max && den<=max){
897 a1= (AVRational){nom, den};
902 int64_t x = nom / den;
903 int64_t next_den= nom - den*x;
904 int64_t a2n= x*a1.num + a0.num;
905 int64_t a2d= x*a1.den + a0.den;
907 if(a2n > max || a2d > max) break;
910 a1= (AVRational){a2n, a2d};
914 assert(ff_gcd(a1.num, a1.den) == 1);
916 *dst_nom = sign ? -a1.num : a1.num;
922 int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding rnd){
927 assert(rnd >=0 && rnd<=5 && rnd!=4);
929 if(a<0 && a != INT64_MIN) return -av_rescale_rnd(-a, b, c, rnd ^ ((rnd>>1)&1));
931 if(rnd==AV_ROUND_NEAR_INF) r= c/2;
932 else if(rnd&1) r= c-1;
934 if(b<=INT_MAX && c<=INT_MAX){
936 return (a * b + r)/c;
938 return a/c*b + (a%c*b + r)/c;
941 ai= av_mul_i(av_int2i(a), av_int2i(b));
942 ai= av_add_i(ai, av_int2i(r));
944 return av_i2int(av_div_i(ai, av_int2i(c)));
947 int64_t av_rescale(int64_t a, int64_t b, int64_t c){
948 return av_rescale_rnd(a, b, c, AV_ROUND_NEAR_INF);
951 int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq){
952 int64_t b= bq.num * (int64_t)cq.den;
953 int64_t c= cq.num * (int64_t)bq.den;
954 return av_rescale_rnd(a, b, c, AV_ROUND_NEAR_INF);
957 int64_t ff_gcd(int64_t a, int64_t b){
958 if(b) return ff_gcd(b, a%b);
964 static int av_log_level = AV_LOG_DEBUG;
966 static void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
968 static int print_prefix=1;
969 AVClass* avc= ptr ? *(AVClass**)ptr : NULL;
970 if(level>av_log_level)
973 if(print_prefix && avc) {
974 fprintf(stderr, "[%s @ %p]", avc->item_name(ptr), avc);
976 #define fprintf please_use_av_log
978 print_prefix= strstr(fmt, "\n") != NULL;
980 vfprintf(stderr, fmt, vl);
983 static void (*av_log_callback)(void*, int, const char*, va_list) = av_log_default_callback;
985 void av_log(void* avcl, int level, const char *fmt, ...)
989 av_vlog(avcl, level, fmt, vl);
993 void av_vlog(void* avcl, int level, const char *fmt, va_list vl)
995 av_log_callback(avcl, level, fmt, vl);
998 int av_log_get_level(void)
1000 return av_log_level;
1003 void av_log_set_level(int level)
1005 av_log_level = level;
1008 void av_log_set_callback(void (*callback)(void*, int, const char*, va_list))
1010 av_log_callback = callback;
1013 #if !defined(HAVE_THREADS)
1014 int avcodec_thread_init(AVCodecContext *s, int thread_count){