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 static 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;
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_YUV422P:
145 case PIX_FMT_YUV444P:
147 case PIX_FMT_YUVJ420P:
148 case PIX_FMT_YUVJ422P:
149 case PIX_FMT_YUVJ444P:
150 w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
153 case PIX_FMT_YUV411P:
157 case PIX_FMT_YUV410P:
158 if(s->codec_id == CODEC_ID_SVQ1){
169 *width = ALIGN(*width , w_align);
170 *height= ALIGN(*height, h_align);
173 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
180 assert(pic->data[0]==NULL);
181 assert(INTERNAL_BUFFER_SIZE > s->internal_buffer_count);
183 if(s->internal_buffer==NULL){
184 s->internal_buffer= av_mallocz(INTERNAL_BUFFER_SIZE*sizeof(InternalBuffer));
187 s->internal_buffer= av_fast_realloc(
189 &s->internal_buffer_size,
190 sizeof(InternalBuffer)*FFMAX(99, s->internal_buffer_count+1)/*FIXME*/
194 buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
195 picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE-1]).last_pic_num; //FIXME ugly hack
199 pic->age= *picture_number - buf->last_pic_num;
200 buf->last_pic_num= *picture_number;
202 int h_chroma_shift, v_chroma_shift;
203 int s_align, pixel_size;
205 avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
224 avcodec_align_dimensions(s, &w, &h);
225 #if defined(ARCH_POWERPC) || defined(HAVE_MMI) //FIXME some cleaner check
231 if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
236 buf->last_pic_num= -256*256*256*64;
239 const int h_shift= i==0 ? 0 : h_chroma_shift;
240 const int v_shift= i==0 ? 0 : v_chroma_shift;
242 //FIXME next ensures that linesize= 2^x uvlinesize, thats needed because some MC code assumes it
243 buf->linesize[i]= ALIGN(pixel_size*w>>h_shift, s_align<<(h_chroma_shift-h_shift));
245 buf->base[i]= av_mallocz((buf->linesize[i]*h>>v_shift)+16); //FIXME 16
246 if(buf->base[i]==NULL) return -1;
247 memset(buf->base[i], 128, buf->linesize[i]*h>>v_shift);
249 if(s->flags&CODEC_FLAG_EMU_EDGE)
250 buf->data[i] = buf->base[i];
252 buf->data[i] = buf->base[i] + ALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), s_align);
254 pic->age= 256*256*256*64;
256 pic->type= FF_BUFFER_TYPE_INTERNAL;
259 pic->base[i]= buf->base[i];
260 pic->data[i]= buf->data[i];
261 pic->linesize[i]= buf->linesize[i];
263 s->internal_buffer_count++;
268 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
270 InternalBuffer *buf, *last, temp;
272 assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
273 assert(s->internal_buffer_count);
275 buf = NULL; /* avoids warning */
276 for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
277 buf= &((InternalBuffer*)s->internal_buffer)[i];
278 if(buf->data[0] == pic->data[0])
281 assert(i < s->internal_buffer_count);
282 s->internal_buffer_count--;
283 last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
291 // pic->base[i]=NULL;
293 //printf("R%X\n", pic->opaque);
296 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
300 /* If no picture return a new buffer */
301 if(pic->data[0] == NULL) {
302 /* We will copy from buffer, so must be readable */
303 pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
304 return s->get_buffer(s, pic);
307 /* If internal buffer type return the same buffer */
308 if(pic->type == FF_BUFFER_TYPE_INTERNAL)
312 * Not internal type and reget_buffer not overridden, emulate cr buffer
315 for(i = 0; i < 4; i++)
316 pic->data[i] = pic->base[i] = NULL;
318 /* Allocate new frame */
319 if (s->get_buffer(s, pic))
321 /* Copy image data from old buffer to new buffer */
322 img_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
324 s->release_buffer(s, &temp_pic); // Release old frame
328 int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void **arg, int *ret, int count){
331 for(i=0; i<count; i++){
332 int r= func(c, arg[i]);
338 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat * fmt){
342 static const char* context_to_name(void* ptr) {
343 AVCodecContext *avc= ptr;
345 if(avc && avc->codec && avc->codec->name)
346 return avc->codec->name;
351 static AVClass av_codec_context_class = { "AVCodecContext", context_to_name };
353 void avcodec_get_context_defaults(AVCodecContext *s){
354 memset(s, 0, sizeof(AVCodecContext));
356 s->av_class= &av_codec_context_class;
357 s->bit_rate= 800*1000;
358 s->bit_rate_tolerance= s->bit_rate*10;
363 s->rc_eq= "tex^qComp";
366 s->b_quant_factor=1.25;
367 s->b_quant_offset=1.25;
368 s->i_quant_factor=-0.8;
369 s->i_quant_offset=0.0;
370 s->error_concealment= 3;
371 s->error_resilience= 1;
372 s->workaround_bugs= FF_BUG_AUTODETECT;
373 s->frame_rate_base= 1;
376 s->me_method= ME_EPZS;
377 s->get_buffer= avcodec_default_get_buffer;
378 s->release_buffer= avcodec_default_release_buffer;
379 s->get_format= avcodec_default_get_format;
380 s->execute= avcodec_default_execute;
382 s->me_subpel_quality=8;
383 s->lmin= FF_QP2LAMBDA * s->qmin;
384 s->lmax= FF_QP2LAMBDA * s->qmax;
385 s->sample_aspect_ratio= (AVRational){0,1};
386 s->ildct_cmp= FF_CMP_VSAD;
388 s->intra_quant_bias= FF_DEFAULT_QUANT_BIAS;
389 s->inter_quant_bias= FF_DEFAULT_QUANT_BIAS;
391 s->reget_buffer= avcodec_default_reget_buffer;
395 * allocates a AVCodecContext and set it to defaults.
396 * this can be deallocated by simply calling free()
398 AVCodecContext *avcodec_alloc_context(void){
399 AVCodecContext *avctx= av_malloc(sizeof(AVCodecContext));
401 if(avctx==NULL) return NULL;
403 avcodec_get_context_defaults(avctx);
408 void avcodec_get_frame_defaults(AVFrame *pic){
409 memset(pic, 0, sizeof(AVFrame));
411 pic->pts= AV_NOPTS_VALUE;
415 * allocates a AVPFrame and set it to defaults.
416 * this can be deallocated by simply calling free()
418 AVFrame *avcodec_alloc_frame(void){
419 AVFrame *pic= av_malloc(sizeof(AVFrame));
421 if(pic==NULL) return NULL;
423 avcodec_get_frame_defaults(pic);
428 int avcodec_open(AVCodecContext *avctx, AVCodec *codec)
435 avctx->codec = codec;
436 avctx->codec_id = codec->id;
437 avctx->frame_number = 0;
438 if (codec->priv_data_size > 0) {
439 avctx->priv_data = av_mallocz(codec->priv_data_size);
440 if (!avctx->priv_data)
443 avctx->priv_data = NULL;
445 ret = avctx->codec->init(avctx);
447 av_freep(&avctx->priv_data);
453 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
454 const short *samples)
458 ret = avctx->codec->encode(avctx, buf, buf_size, (void *)samples);
459 avctx->frame_number++;
463 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
468 ret = avctx->codec->encode(avctx, buf, buf_size, (void *)pict);
470 emms_c(); //needed to avoid a emms_c() call before every return;
472 avctx->frame_number++;
478 * @param buf bitstream buffer, must be FF_INPUT_BUFFER_PADDING_SIZE larger then the actual read bytes
479 * because some optimized bitstream readers read 32 or 64 bit at once and could read over the end
480 * @param buf_size the size of the buffer in bytes
481 * @param got_picture_ptr zero if no frame could be decompressed, Otherwise, it is non zero
482 * @return -1 if error, otherwise return the number of
485 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
486 int *got_picture_ptr,
487 uint8_t *buf, int buf_size)
491 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
494 emms_c(); //needed to avoid a emms_c() call before every return;
496 if (*got_picture_ptr)
497 avctx->frame_number++;
501 /* decode an audio frame. return -1 if error, otherwise return the
502 *number of bytes used. If no frame could be decompressed,
503 *frame_size_ptr is zero. Otherwise, it is the decompressed frame
505 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
507 uint8_t *buf, int buf_size)
511 ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
513 avctx->frame_number++;
517 int avcodec_close(AVCodecContext *avctx)
519 if (avctx->codec->close)
520 avctx->codec->close(avctx);
521 avcodec_default_free_buffers(avctx);
522 av_freep(&avctx->priv_data);
527 AVCodec *avcodec_find_encoder(enum CodecID id)
532 if (p->encode != NULL && p->id == id)
539 AVCodec *avcodec_find_encoder_by_name(const char *name)
544 if (p->encode != NULL && strcmp(name,p->name) == 0)
551 AVCodec *avcodec_find_decoder(enum CodecID id)
556 if (p->decode != NULL && p->id == id)
563 AVCodec *avcodec_find_decoder_by_name(const char *name)
568 if (p->decode != NULL && strcmp(name,p->name) == 0)
575 AVCodec *avcodec_find(enum CodecID id)
587 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
589 const char *codec_name;
592 char channels_str[100];
596 p = avcodec_find_encoder(enc->codec_id);
598 p = avcodec_find_decoder(enc->codec_id);
601 codec_name = p->name;
602 if (!encode && enc->codec_id == CODEC_ID_MP3) {
603 if (enc->sub_id == 2)
605 else if (enc->sub_id == 1)
608 } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
609 /* fake mpeg2 transport stream codec (currently not
611 codec_name = "mpeg2ts";
612 } else if (enc->codec_name[0] != '\0') {
613 codec_name = enc->codec_name;
615 /* output avi tags */
616 if (enc->codec_type == CODEC_TYPE_VIDEO) {
617 snprintf(buf1, sizeof(buf1), "%c%c%c%c",
618 enc->codec_tag & 0xff,
619 (enc->codec_tag >> 8) & 0xff,
620 (enc->codec_tag >> 16) & 0xff,
621 (enc->codec_tag >> 24) & 0xff);
623 snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
628 switch(enc->codec_type) {
629 case CODEC_TYPE_VIDEO:
630 snprintf(buf, buf_size,
632 codec_name, enc->mb_decision ? " (hq)" : "");
633 if (enc->codec_id == CODEC_ID_RAWVIDEO) {
634 snprintf(buf + strlen(buf), buf_size - strlen(buf),
636 avcodec_get_pix_fmt_name(enc->pix_fmt));
639 snprintf(buf + strlen(buf), buf_size - strlen(buf),
640 ", %dx%d, %0.2f fps",
641 enc->width, enc->height,
642 (float)enc->frame_rate / enc->frame_rate_base);
645 snprintf(buf + strlen(buf), buf_size - strlen(buf),
646 ", q=%d-%d", enc->qmin, enc->qmax);
648 bitrate = enc->bit_rate;
650 case CODEC_TYPE_AUDIO:
651 snprintf(buf, buf_size,
654 switch (enc->channels) {
656 strcpy(channels_str, "mono");
659 strcpy(channels_str, "stereo");
662 strcpy(channels_str, "5:1");
665 sprintf(channels_str, "%d channels", enc->channels);
668 if (enc->sample_rate) {
669 snprintf(buf + strlen(buf), buf_size - strlen(buf),
675 /* for PCM codecs, compute bitrate directly */
676 switch(enc->codec_id) {
677 case CODEC_ID_PCM_S16LE:
678 case CODEC_ID_PCM_S16BE:
679 case CODEC_ID_PCM_U16LE:
680 case CODEC_ID_PCM_U16BE:
681 bitrate = enc->sample_rate * enc->channels * 16;
683 case CODEC_ID_PCM_S8:
684 case CODEC_ID_PCM_U8:
685 case CODEC_ID_PCM_ALAW:
686 case CODEC_ID_PCM_MULAW:
687 bitrate = enc->sample_rate * enc->channels * 8;
690 bitrate = enc->bit_rate;
694 case CODEC_TYPE_DATA:
695 snprintf(buf, buf_size, "Data: %s", codec_name);
696 bitrate = enc->bit_rate;
702 if (enc->flags & CODEC_FLAG_PASS1)
703 snprintf(buf + strlen(buf), buf_size - strlen(buf),
705 if (enc->flags & CODEC_FLAG_PASS2)
706 snprintf(buf + strlen(buf), buf_size - strlen(buf),
710 snprintf(buf + strlen(buf), buf_size - strlen(buf),
711 ", %d kb/s", bitrate / 1000);
715 unsigned avcodec_version( void )
717 return LIBAVCODEC_VERSION_INT;
720 unsigned avcodec_build( void )
722 return LIBAVCODEC_BUILD;
725 /* must be called before any other functions */
726 void avcodec_init(void)
728 static int inited = 0;
734 dsputil_static_init();
738 * Flush buffers, should be called when seeking or when swicthing to a different stream.
740 void avcodec_flush_buffers(AVCodecContext *avctx)
742 if(avctx->codec->flush)
743 avctx->codec->flush(avctx);
746 static void avcodec_default_free_buffers(AVCodecContext *s){
749 if(s->internal_buffer==NULL) return;
751 for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
752 InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
754 av_freep(&buf->base[j]);
758 av_freep(&s->internal_buffer);
760 s->internal_buffer_count=0;
763 char av_get_pict_type_char(int pict_type){
765 case I_TYPE: return 'I';
766 case P_TYPE: return 'P';
767 case B_TYPE: return 'B';
768 case S_TYPE: return 'S';
769 case SI_TYPE:return 'i';
770 case SP_TYPE:return 'p';
775 int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max){
782 return av_reduce(dst_nom, dst_den, -nom, -den, max);
787 gcd = ff_gcd(nom, den);
791 if(nom > max || den > max){
792 AVRational a0={0,1}, a1={1,0};
796 int64_t x= nom / den;
797 int64_t a2n= x*a1.num + a0.num;
798 int64_t a2d= x*a1.den + a0.den;
800 if(a2n > max || a2d > max) break;
805 a1= (AVRational){a2n, a2d};
807 x= nom; nom=den; den=x;
813 assert(ff_gcd(nom, den) == 1);
815 *dst_nom = sign ? -nom : nom;
821 int64_t av_rescale(int64_t a, int64_t b, int64_t c){
826 if(a<0) return -av_rescale(-a, b, c);
828 if(b<=INT_MAX && c<=INT_MAX){
830 return (a * b + c/2)/c;
832 return a/c*b + (a%c*b + c/2)/c;
835 ai= av_mul_i(av_int2i(a), av_int2i(b));
837 ai= av_add_i(ai, av_shr_i(ci,1));
839 return av_i2int(av_div_i(ai, ci));
844 static int av_log_level = AV_LOG_DEBUG;
846 static void av_log_default_callback(void* ptr, int level, const char* fmt, va_list vl)
848 static int print_prefix=1;
849 AVClass* avc= ptr ? *(AVClass**)ptr : NULL;
850 if(level>av_log_level)
853 if(print_prefix && avc) {
854 fprintf(stderr, "[%s @ %p]", avc->item_name(ptr), avc);
856 #define fprintf please_use_av_log
858 print_prefix= strstr(fmt, "\n") != NULL;
860 vfprintf(stderr, fmt, vl);
863 static void (*av_log_callback)(void*, int, const char*, va_list) = av_log_default_callback;
865 void av_log(void* avcl, int level, const char *fmt, ...)
869 av_vlog(avcl, level, fmt, vl);
873 void av_vlog(void* avcl, int level, const char *fmt, va_list vl)
875 av_log_callback(avcl, level, fmt, vl);
878 int av_log_get_level(void)
883 void av_log_set_level(int level)
885 av_log_level = level;
888 void av_log_set_callback(void (*callback)(void*, int, const char*, va_list))
890 av_log_callback = callback;
893 #if !defined(HAVE_PTHREADS) && !defined(HAVE_W32THREADS)
894 int avcodec_thread_init(AVCodecContext *s, int thread_count){