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 void avcodec_default_free_buffers(AVCodecContext *s);
36 void *av_mallocz(unsigned int size)
40 ptr = av_malloc(size);
47 char *av_strdup(const char *s)
60 * realloc which does nothing if the block is large enough
62 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
67 *size= 17*min_size/16 + 32;
69 return av_realloc(ptr, *size);
73 static unsigned int last_static = 0;
74 static unsigned int allocated_static = 0;
75 static void** array_static = NULL;
78 * allocation of static arrays - do not use for normal allocation.
80 void *av_mallocz_static(unsigned int size)
82 void *ptr = av_mallocz(size);
85 array_static =av_fast_realloc(array_static, &allocated_static, sizeof(void*)*(last_static+1));
86 array_static[last_static++] = ptr;
93 * free all static arrays and reset pointers to 0.
95 void av_free_static(void)
98 av_freep(&array_static[--last_static]);
100 av_freep(&array_static);
104 * Frees memory and sets the pointer to NULL.
105 * @param arg pointer to the pointer which should be freed
107 void av_freep(void *arg)
109 void **ptr= (void**)arg;
114 /* encoder management */
115 AVCodec *first_avcodec = NULL;
117 void register_avcodec(AVCodec *format)
121 while (*p != NULL) p = &(*p)->next;
126 typedef struct InternalBuffer{
133 #define INTERNAL_BUFFER_SIZE 32
135 #define ALIGN(x, a) (((x)+(a)-1)&~((a)-1))
137 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
142 case PIX_FMT_YUV420P:
144 case PIX_FMT_UYVY422:
145 case PIX_FMT_YUV422P:
146 case PIX_FMT_YUV444P:
148 case PIX_FMT_YUVJ420P:
149 case PIX_FMT_YUVJ422P:
150 case PIX_FMT_YUVJ444P:
151 w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
154 case PIX_FMT_YUV411P:
158 case PIX_FMT_YUV410P:
159 if(s->codec_id == CODEC_ID_SVQ1){
164 if(s->codec_id == CODEC_ID_RPZA){
169 if(s->codec_id == CODEC_ID_SMC){
180 *width = ALIGN(*width , w_align);
181 *height= ALIGN(*height, h_align);
184 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
191 assert(pic->data[0]==NULL);
192 assert(INTERNAL_BUFFER_SIZE > s->internal_buffer_count);
194 if(s->internal_buffer==NULL){
195 s->internal_buffer= av_mallocz(INTERNAL_BUFFER_SIZE*sizeof(InternalBuffer));
198 s->internal_buffer= av_fast_realloc(
200 &s->internal_buffer_size,
201 sizeof(InternalBuffer)*FFMAX(99, s->internal_buffer_count+1)/*FIXME*/
205 buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
206 picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE-1]).last_pic_num; //FIXME ugly hack
210 pic->age= *picture_number - buf->last_pic_num;
211 buf->last_pic_num= *picture_number;
213 int h_chroma_shift, v_chroma_shift;
214 int s_align, pixel_size;
216 avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
222 case PIX_FMT_UYVY422:
236 avcodec_align_dimensions(s, &w, &h);
237 #if defined(ARCH_POWERPC) || defined(HAVE_MMI) //FIXME some cleaner check
243 if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
248 buf->last_pic_num= -256*256*256*64;
251 const int h_shift= i==0 ? 0 : h_chroma_shift;
252 const int v_shift= i==0 ? 0 : v_chroma_shift;
254 //FIXME next ensures that linesize= 2^x uvlinesize, thats needed because some MC code assumes it
255 buf->linesize[i]= ALIGN(pixel_size*w>>h_shift, s_align<<(h_chroma_shift-h_shift));
257 buf->base[i]= av_mallocz((buf->linesize[i]*h>>v_shift)+16); //FIXME 16
258 if(buf->base[i]==NULL) return -1;
259 memset(buf->base[i], 128, buf->linesize[i]*h>>v_shift);
261 if(s->flags&CODEC_FLAG_EMU_EDGE)
262 buf->data[i] = buf->base[i];
264 buf->data[i] = buf->base[i] + ALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), s_align);
266 pic->age= 256*256*256*64;
268 pic->type= FF_BUFFER_TYPE_INTERNAL;
271 pic->base[i]= buf->base[i];
272 pic->data[i]= buf->data[i];
273 pic->linesize[i]= buf->linesize[i];
275 s->internal_buffer_count++;
280 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
282 InternalBuffer *buf, *last, temp;
284 assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
285 assert(s->internal_buffer_count);
287 buf = NULL; /* avoids warning */
288 for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
289 buf= &((InternalBuffer*)s->internal_buffer)[i];
290 if(buf->data[0] == pic->data[0])
293 assert(i < s->internal_buffer_count);
294 s->internal_buffer_count--;
295 last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
303 // pic->base[i]=NULL;
305 //printf("R%X\n", pic->opaque);
308 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
312 /* If no picture return a new buffer */
313 if(pic->data[0] == NULL) {
314 /* We will copy from buffer, so must be readable */
315 pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
316 return s->get_buffer(s, pic);
319 /* If internal buffer type return the same buffer */
320 if(pic->type == FF_BUFFER_TYPE_INTERNAL)
324 * Not internal type and reget_buffer not overridden, emulate cr buffer
327 for(i = 0; i < 4; i++)
328 pic->data[i] = pic->base[i] = NULL;
330 /* Allocate new frame */
331 if (s->get_buffer(s, pic))
333 /* Copy image data from old buffer to new buffer */
334 img_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
336 s->release_buffer(s, &temp_pic); // Release old frame
340 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count){
343 for(i=0; i<count; i++){
344 int r= func(c, arg[i]);
350 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt){
354 static const char* context_to_name(void* ptr) {
355 AVCodecContext *avc= ptr;
357 if(avc && avc->codec && avc->codec->name)
358 return avc->codec->name;
363 static AVClass av_codec_context_class = { "AVCodecContext", context_to_name };
365 void avcodec_get_context_defaults(AVCodecContext *s){
366 memset(s, 0, sizeof(AVCodecContext));
368 s->av_class= &av_codec_context_class;
369 s->bit_rate= 800*1000;
370 s->bit_rate_tolerance= s->bit_rate*10;
375 s->rc_eq= "tex^qComp";
378 s->b_quant_factor=1.25;
379 s->b_quant_offset=1.25;
380 s->i_quant_factor=-0.8;
381 s->i_quant_offset=0.0;
382 s->error_concealment= 3;
383 s->error_resilience= 1;
384 s->workaround_bugs= FF_BUG_AUTODETECT;
385 s->frame_rate_base= 1;
388 s->me_method= ME_EPZS;
389 s->get_buffer= avcodec_default_get_buffer;
390 s->release_buffer= avcodec_default_release_buffer;
391 s->get_format= avcodec_default_get_format;
392 s->execute= avcodec_default_execute;
394 s->me_subpel_quality=8;
395 s->lmin= FF_QP2LAMBDA * s->qmin;
396 s->lmax= FF_QP2LAMBDA * s->qmax;
397 s->sample_aspect_ratio= (AVRational){0,1};
398 s->ildct_cmp= FF_CMP_VSAD;
399 s->profile= FF_PROFILE_UNKNOWN;
400 s->level= FF_LEVEL_UNKNOWN;
402 s->intra_quant_bias= FF_DEFAULT_QUANT_BIAS;
403 s->inter_quant_bias= FF_DEFAULT_QUANT_BIAS;
405 s->reget_buffer= avcodec_default_reget_buffer;
409 * allocates a AVCodecContext and set it to defaults.
410 * this can be deallocated by simply calling free()
412 AVCodecContext *avcodec_alloc_context(void){
413 AVCodecContext *avctx= av_malloc(sizeof(AVCodecContext));
415 if(avctx==NULL) return NULL;
417 avcodec_get_context_defaults(avctx);
422 void avcodec_get_frame_defaults(AVFrame *pic){
423 memset(pic, 0, sizeof(AVFrame));
425 pic->pts= AV_NOPTS_VALUE;
429 * allocates a AVPFrame and set it to defaults.
430 * this can be deallocated by simply calling free()
432 AVFrame *avcodec_alloc_frame(void){
433 AVFrame *pic= av_malloc(sizeof(AVFrame));
435 if(pic==NULL) return NULL;
437 avcodec_get_frame_defaults(pic);
442 int avcodec_open(AVCodecContext *avctx, AVCodec *codec)
449 avctx->codec = codec;
450 avctx->codec_id = codec->id;
451 avctx->frame_number = 0;
452 if (codec->priv_data_size > 0) {
453 avctx->priv_data = av_mallocz(codec->priv_data_size);
454 if (!avctx->priv_data)
457 avctx->priv_data = NULL;
459 ret = avctx->codec->init(avctx);
461 av_freep(&avctx->priv_data);
467 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
468 const short *samples)
470 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || samples){
471 int ret = avctx->codec->encode(avctx, buf, buf_size, (void *)samples);
472 avctx->frame_number++;
478 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
481 if((avctx->codec->capabilities & CODEC_CAP_DELAY) || pict){
482 int ret = avctx->codec->encode(avctx, buf, buf_size, (void *)pict);
483 avctx->frame_number++;
484 emms_c(); //needed to avoid a emms_c() call before every return;
493 * @param buf bitstream buffer, must be FF_INPUT_BUFFER_PADDING_SIZE larger then the actual read bytes
494 * because some optimized bitstream readers read 32 or 64 bit at once and could read over the end
495 * @param buf_size the size of the buffer in bytes
496 * @param got_picture_ptr zero if no frame could be decompressed, Otherwise, it is non zero
497 * @return -1 if error, otherwise return the number of
500 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
501 int *got_picture_ptr,
502 uint8_t *buf, int buf_size)
507 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
510 emms_c(); //needed to avoid a emms_c() call before every return;
512 if (*got_picture_ptr)
513 avctx->frame_number++;
517 /* decode an audio frame. return -1 if error, otherwise return the
518 *number of bytes used. If no frame could be decompressed,
519 *frame_size_ptr is zero. Otherwise, it is the decompressed frame
521 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
523 uint8_t *buf, int buf_size)
528 ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
530 avctx->frame_number++;
534 int avcodec_close(AVCodecContext *avctx)
536 if (avctx->codec->close)
537 avctx->codec->close(avctx);
538 avcodec_default_free_buffers(avctx);
539 av_freep(&avctx->priv_data);
544 AVCodec *avcodec_find_encoder(enum CodecID id)
549 if (p->encode != NULL && p->id == id)
556 AVCodec *avcodec_find_encoder_by_name(const char *name)
561 if (p->encode != NULL && strcmp(name,p->name) == 0)
568 AVCodec *avcodec_find_decoder(enum CodecID id)
573 if (p->decode != NULL && p->id == id)
580 AVCodec *avcodec_find_decoder_by_name(const char *name)
585 if (p->decode != NULL && strcmp(name,p->name) == 0)
592 static AVCodec *avcodec_find(enum CodecID id)
604 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
606 const char *codec_name;
609 char channels_str[100];
613 p = avcodec_find_encoder(enc->codec_id);
615 p = avcodec_find_decoder(enc->codec_id);
618 codec_name = p->name;
619 if (!encode && enc->codec_id == CODEC_ID_MP3) {
620 if (enc->sub_id == 2)
622 else if (enc->sub_id == 1)
625 } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
626 /* fake mpeg2 transport stream codec (currently not
628 codec_name = "mpeg2ts";
629 } else if (enc->codec_name[0] != '\0') {
630 codec_name = enc->codec_name;
632 /* output avi tags */
633 if (enc->codec_type == CODEC_TYPE_VIDEO) {
634 snprintf(buf1, sizeof(buf1), "%c%c%c%c",
635 enc->codec_tag & 0xff,
636 (enc->codec_tag >> 8) & 0xff,
637 (enc->codec_tag >> 16) & 0xff,
638 (enc->codec_tag >> 24) & 0xff);
640 snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
645 switch(enc->codec_type) {
646 case CODEC_TYPE_VIDEO:
647 snprintf(buf, buf_size,
649 codec_name, enc->mb_decision ? " (hq)" : "");
650 if (enc->codec_id == CODEC_ID_RAWVIDEO) {
651 snprintf(buf + strlen(buf), buf_size - strlen(buf),
653 avcodec_get_pix_fmt_name(enc->pix_fmt));
656 snprintf(buf + strlen(buf), buf_size - strlen(buf),
657 ", %dx%d, %0.2f fps",
658 enc->width, enc->height,
659 (float)enc->frame_rate / enc->frame_rate_base);
662 snprintf(buf + strlen(buf), buf_size - strlen(buf),
663 ", q=%d-%d", enc->qmin, enc->qmax);
665 bitrate = enc->bit_rate;
667 case CODEC_TYPE_AUDIO:
668 snprintf(buf, buf_size,
671 switch (enc->channels) {
673 strcpy(channels_str, "mono");
676 strcpy(channels_str, "stereo");
679 strcpy(channels_str, "5:1");
682 sprintf(channels_str, "%d channels", enc->channels);
685 if (enc->sample_rate) {
686 snprintf(buf + strlen(buf), buf_size - strlen(buf),
692 /* for PCM codecs, compute bitrate directly */
693 switch(enc->codec_id) {
694 case CODEC_ID_PCM_S16LE:
695 case CODEC_ID_PCM_S16BE:
696 case CODEC_ID_PCM_U16LE:
697 case CODEC_ID_PCM_U16BE:
698 bitrate = enc->sample_rate * enc->channels * 16;
700 case CODEC_ID_PCM_S8:
701 case CODEC_ID_PCM_U8:
702 case CODEC_ID_PCM_ALAW:
703 case CODEC_ID_PCM_MULAW:
704 bitrate = enc->sample_rate * enc->channels * 8;
707 bitrate = enc->bit_rate;
711 case CODEC_TYPE_DATA:
712 snprintf(buf, buf_size, "Data: %s", codec_name);
713 bitrate = enc->bit_rate;
719 if (enc->flags & CODEC_FLAG_PASS1)
720 snprintf(buf + strlen(buf), buf_size - strlen(buf),
722 if (enc->flags & CODEC_FLAG_PASS2)
723 snprintf(buf + strlen(buf), buf_size - strlen(buf),
727 snprintf(buf + strlen(buf), buf_size - strlen(buf),
728 ", %d kb/s", bitrate / 1000);
732 unsigned avcodec_version( void )
734 return LIBAVCODEC_VERSION_INT;
737 unsigned avcodec_build( void )
739 return LIBAVCODEC_BUILD;
742 /* must be called before any other functions */
743 void avcodec_init(void)
745 static int inited = 0;
751 dsputil_static_init();
755 * Flush buffers, should be called when seeking or when swicthing to a different stream.
757 void avcodec_flush_buffers(AVCodecContext *avctx)
759 if(avctx->codec->flush)
760 avctx->codec->flush(avctx);
763 void avcodec_default_free_buffers(AVCodecContext *s){
766 if(s->internal_buffer==NULL) return;
768 for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
769 InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
771 av_freep(&buf->base[j]);
775 av_freep(&s->internal_buffer);
777 s->internal_buffer_count=0;
780 char av_get_pict_type_char(int pict_type){
782 case I_TYPE: return 'I';
783 case P_TYPE: return 'P';
784 case B_TYPE: return 'B';
785 case S_TYPE: return 'S';
786 case SI_TYPE:return 'i';
787 case SP_TYPE:return 'p';
792 int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max){
793 AVRational a0={0,1}, a1={1,0};
794 int sign= (nom<0) ^ (den<0);
795 int64_t gcd= ff_gcd(ABS(nom), ABS(den));
799 if(nom<=max && den<=max){
800 a1= (AVRational){nom, den};
805 int64_t x = nom / den;
806 int64_t next_den= nom - den*x;
807 int64_t a2n= x*a1.num + a0.num;
808 int64_t a2d= x*a1.den + a0.den;
810 if(a2n > max || a2d > max) break;
813 a1= (AVRational){a2n, a2d};
817 assert(ff_gcd(a1.num, a1.den) == 1);
819 *dst_nom = sign ? -a1.num : a1.num;
825 int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding rnd){
830 assert(rnd >=0 && rnd<=5 && rnd!=4);
832 if(a<0) return -av_rescale_rnd(-a, b, c, rnd ^ ((rnd>>1)&1));
834 if(rnd==AV_ROUND_NEAR_INF) r= c/2;
835 else if(rnd&1) r= c-1;
837 if(b<=INT_MAX && c<=INT_MAX){
839 return (a * b + r)/c;
841 return a/c*b + (a%c*b + r)/c;
844 ai= av_mul_i(av_int2i(a), av_int2i(b));
845 ai= av_add_i(ai, av_int2i(r));
847 return av_i2int(av_div_i(ai, av_int2i(c)));
850 int64_t av_rescale(int64_t a, int64_t b, int64_t c){
851 return av_rescale_rnd(a, b, c, AV_ROUND_NEAR_INF);
856 static int av_log_level = AV_LOG_DEBUG;
858 static void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
860 static int print_prefix=1;
861 AVClass* avc= ptr ? *(AVClass**)ptr : NULL;
862 if(level>av_log_level)
865 if(print_prefix && avc) {
866 fprintf(stderr, "[%s @ %p]", avc->item_name(ptr), avc);
868 #define fprintf please_use_av_log
870 print_prefix= strstr(fmt, "\n") != NULL;
872 vfprintf(stderr, fmt, vl);
875 static void (*av_log_callback)(void*, int, const char*, va_list) = av_log_default_callback;
877 void av_log(void* avcl, int level, const char *fmt, ...)
881 av_vlog(avcl, level, fmt, vl);
885 void av_vlog(void* avcl, int level, const char *fmt, va_list vl)
887 av_log_callback(avcl, level, fmt, vl);
890 int av_log_get_level(void)
895 void av_log_set_level(int level)
897 av_log_level = level;
900 void av_log_set_callback(void (*callback)(void*, int, const char*, va_list))
902 av_log_callback = callback;
905 #if !defined(HAVE_PTHREADS) && !defined(HAVE_W32THREADS)
906 int avcodec_thread_init(AVCodecContext *s, int thread_count){