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"
32 void *av_mallocz(unsigned int size)
36 ptr = av_malloc(size);
43 char *av_strdup(const char *s)
56 * realloc which does nothing if the block is large enough
58 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
63 *size= min_size + 10*1024;
65 return av_realloc(ptr, *size);
69 /* allocation of static arrays - do not use for normal allocation */
70 static unsigned int last_static = 0;
71 static char*** array_static = NULL;
72 static const unsigned int grow_static = 64; // ^2
73 void *__av_mallocz_static(void** location, unsigned int size)
75 unsigned int l = (last_static + grow_static) & ~(grow_static - 1);
76 void *ptr = av_mallocz(size);
83 array_static = av_realloc(array_static, l);
84 array_static[last_static++] = (char**) location;
89 /* free all static arrays and reset pointers to 0 */
90 void av_free_static(void)
95 for (i = 0; i < last_static; i++)
97 av_free(*array_static[i]);
98 *array_static[i] = NULL;
100 av_free(array_static);
106 /* cannot call it directly because of 'void **' casting is not automatic */
107 void __av_freep(void **ptr)
113 /* encoder management */
114 AVCodec *first_avcodec;
116 void register_avcodec(AVCodec *format)
120 while (*p != NULL) p = &(*p)->next;
125 typedef struct InternalBuffer{
132 #define INTERNAL_BUFFER_SIZE 32
134 #define ALIGN(x, a) (((x)+(a)-1)&~((a)-1))
136 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
141 case PIX_FMT_YUV420P:
143 case PIX_FMT_YUV422P:
144 case PIX_FMT_YUV444P:
146 case PIX_FMT_YUVJ420P:
147 case PIX_FMT_YUVJ422P:
148 case PIX_FMT_YUVJ444P:
149 w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
152 case PIX_FMT_YUV411P:
156 case PIX_FMT_YUV410P:
157 if(s->codec_id == CODEC_ID_SVQ1){
168 *width = ALIGN(*width , w_align);
169 *height= ALIGN(*height, h_align);
172 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
179 assert(pic->data[0]==NULL);
180 assert(INTERNAL_BUFFER_SIZE > s->internal_buffer_count);
182 if(s->internal_buffer==NULL){
183 s->internal_buffer= av_mallocz(INTERNAL_BUFFER_SIZE*sizeof(InternalBuffer));
186 s->internal_buffer= av_fast_realloc(
188 &s->internal_buffer_size,
189 sizeof(InternalBuffer)*FFMAX(99, s->internal_buffer_count+1)/*FIXME*/
193 buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
194 picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE-1]).last_pic_num; //FIXME ugly hack
198 pic->age= *picture_number - buf->last_pic_num;
199 buf->last_pic_num= *picture_number;
201 int h_chroma_shift, v_chroma_shift;
202 int s_align, pixel_size;
204 avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
223 avcodec_align_dimensions(s, &w, &h);
224 #if defined(ARCH_POWERPC) || defined(HAVE_MMI) //FIXME some cleaner check
230 if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
235 buf->last_pic_num= -256*256*256*64;
238 const int h_shift= i==0 ? 0 : h_chroma_shift;
239 const int v_shift= i==0 ? 0 : v_chroma_shift;
241 //FIXME next ensures that linesize= 2^x uvlinesize, thats needed because some MC code assumes it
242 buf->linesize[i]= ALIGN(pixel_size*w>>h_shift, s_align<<(h_chroma_shift-h_shift));
244 buf->base[i]= av_mallocz((buf->linesize[i]*h>>v_shift)+16); //FIXME 16
245 if(buf->base[i]==NULL) return -1;
246 memset(buf->base[i], 128, buf->linesize[i]*h>>v_shift);
248 if(s->flags&CODEC_FLAG_EMU_EDGE)
249 buf->data[i] = buf->base[i];
251 buf->data[i] = buf->base[i] + ALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), s_align);
253 pic->age= 256*256*256*64;
255 pic->type= FF_BUFFER_TYPE_INTERNAL;
258 pic->base[i]= buf->base[i];
259 pic->data[i]= buf->data[i];
260 pic->linesize[i]= buf->linesize[i];
262 s->internal_buffer_count++;
267 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
269 InternalBuffer *buf, *last, temp;
271 assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
272 assert(s->internal_buffer_count);
274 buf = NULL; /* avoids warning */
275 for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
276 buf= &((InternalBuffer*)s->internal_buffer)[i];
277 if(buf->data[0] == pic->data[0])
280 assert(i < s->internal_buffer_count);
281 s->internal_buffer_count--;
282 last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
290 // pic->base[i]=NULL;
292 //printf("R%X\n", pic->opaque);
295 int avcodec_default_reget_buffer(AVCodecContext *s, AVFrame *pic){
299 /* If no picture return a new buffer */
300 if(pic->data[0] == NULL) {
301 /* We will copy from buffer, so must be readable */
302 pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;
303 return s->get_buffer(s, pic);
306 /* If internal buffer type return the same buffer */
307 if(pic->type == FF_BUFFER_TYPE_INTERNAL)
311 * Not internal type and reget_buffer not overridden, emulate cr buffer
314 for(i = 0; i < 4; i++)
315 pic->data[i] = pic->base[i] = NULL;
317 /* Allocate new frame */
318 if (s->get_buffer(s, pic))
320 /* Copy image data from old buffer to new buffer */
321 img_copy((AVPicture*)pic, (AVPicture*)&temp_pic, s->pix_fmt, s->width,
323 s->release_buffer(s, &temp_pic); // Release old frame
327 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, enum PixelFormat * fmt){
331 void avcodec_get_context_defaults(AVCodecContext *s){
332 s->bit_rate= 800*1000;
333 s->bit_rate_tolerance= s->bit_rate*10;
338 s->rc_eq= "tex^qComp";
341 s->b_quant_factor=1.25;
342 s->b_quant_offset=1.25;
343 s->i_quant_factor=-0.8;
344 s->i_quant_offset=0.0;
345 s->error_concealment= 3;
346 s->error_resilience= 1;
347 s->workaround_bugs= FF_BUG_AUTODETECT;
348 s->frame_rate_base= 1;
351 s->me_method= ME_EPZS;
352 s->get_buffer= avcodec_default_get_buffer;
353 s->release_buffer= avcodec_default_release_buffer;
354 s->get_format= avcodec_default_get_format;
355 s->me_subpel_quality=8;
356 s->lmin= FF_QP2LAMBDA * s->qmin;
357 s->lmax= FF_QP2LAMBDA * s->qmax;
358 s->sample_aspect_ratio= (AVRational){0,1};
359 s->ildct_cmp= FF_CMP_VSAD;
361 s->intra_quant_bias= FF_DEFAULT_QUANT_BIAS;
362 s->inter_quant_bias= FF_DEFAULT_QUANT_BIAS;
364 s->reget_buffer= avcodec_default_reget_buffer;
368 * allocates a AVCodecContext and set it to defaults.
369 * this can be deallocated by simply calling free()
371 AVCodecContext *avcodec_alloc_context(void){
372 AVCodecContext *avctx= av_mallocz(sizeof(AVCodecContext));
374 if(avctx==NULL) return NULL;
376 avcodec_get_context_defaults(avctx);
382 * allocates a AVPFrame and set it to defaults.
383 * this can be deallocated by simply calling free()
385 AVFrame *avcodec_alloc_frame(void){
386 AVFrame *pic= av_mallocz(sizeof(AVFrame));
391 int avcodec_open(AVCodecContext *avctx, AVCodec *codec)
398 avctx->codec = codec;
399 avctx->codec_id = codec->id;
400 avctx->frame_number = 0;
401 if (codec->priv_data_size > 0) {
402 avctx->priv_data = av_mallocz(codec->priv_data_size);
403 if (!avctx->priv_data)
406 avctx->priv_data = NULL;
408 ret = avctx->codec->init(avctx);
410 av_freep(&avctx->priv_data);
416 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
417 const short *samples)
421 ret = avctx->codec->encode(avctx, buf, buf_size, (void *)samples);
422 avctx->frame_number++;
426 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
431 ret = avctx->codec->encode(avctx, buf, buf_size, (void *)pict);
433 emms_c(); //needed to avoid a emms_c() call before every return;
435 avctx->frame_number++;
441 * @param buf bitstream buffer, must be FF_INPUT_BUFFER_PADDING_SIZE larger then the actual read bytes
442 * because some optimized bitstream readers read 32 or 64 bit at once and could read over the end
443 * @param buf_size the size of the buffer in bytes
444 * @param got_picture_ptr zero if no frame could be decompressed, Otherwise, it is non zero
445 * @return -1 if error, otherwise return the number of
448 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
449 int *got_picture_ptr,
450 uint8_t *buf, int buf_size)
454 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
457 emms_c(); //needed to avoid a emms_c() call before every return;
459 if (*got_picture_ptr)
460 avctx->frame_number++;
464 /* decode an audio frame. return -1 if error, otherwise return the
465 *number of bytes used. If no frame could be decompressed,
466 *frame_size_ptr is zero. Otherwise, it is the decompressed frame
468 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
470 uint8_t *buf, int buf_size)
474 ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
476 avctx->frame_number++;
480 int avcodec_close(AVCodecContext *avctx)
482 if (avctx->codec->close)
483 avctx->codec->close(avctx);
484 av_freep(&avctx->priv_data);
489 AVCodec *avcodec_find_encoder(enum CodecID id)
494 if (p->encode != NULL && p->id == id)
501 AVCodec *avcodec_find_encoder_by_name(const char *name)
506 if (p->encode != NULL && strcmp(name,p->name) == 0)
513 AVCodec *avcodec_find_decoder(enum CodecID id)
518 if (p->decode != NULL && p->id == id)
525 AVCodec *avcodec_find_decoder_by_name(const char *name)
530 if (p->decode != NULL && strcmp(name,p->name) == 0)
537 AVCodec *avcodec_find(enum CodecID id)
549 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
551 const char *codec_name;
554 char channels_str[100];
558 p = avcodec_find_encoder(enc->codec_id);
560 p = avcodec_find_decoder(enc->codec_id);
563 codec_name = p->name;
564 if (!encode && enc->codec_id == CODEC_ID_MP3) {
565 if (enc->sub_id == 2)
567 else if (enc->sub_id == 1)
570 } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
571 /* fake mpeg2 transport stream codec (currently not
573 codec_name = "mpeg2ts";
574 } else if (enc->codec_name[0] != '\0') {
575 codec_name = enc->codec_name;
577 /* output avi tags */
578 if (enc->codec_type == CODEC_TYPE_VIDEO) {
579 snprintf(buf1, sizeof(buf1), "%c%c%c%c",
580 enc->codec_tag & 0xff,
581 (enc->codec_tag >> 8) & 0xff,
582 (enc->codec_tag >> 16) & 0xff,
583 (enc->codec_tag >> 24) & 0xff);
585 snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
590 switch(enc->codec_type) {
591 case CODEC_TYPE_VIDEO:
592 snprintf(buf, buf_size,
594 codec_name, enc->mb_decision ? " (hq)" : "");
595 if (enc->codec_id == CODEC_ID_RAWVIDEO) {
596 snprintf(buf + strlen(buf), buf_size - strlen(buf),
598 avcodec_get_pix_fmt_name(enc->pix_fmt));
601 snprintf(buf + strlen(buf), buf_size - strlen(buf),
602 ", %dx%d, %0.2f fps",
603 enc->width, enc->height,
604 (float)enc->frame_rate / enc->frame_rate_base);
607 snprintf(buf + strlen(buf), buf_size - strlen(buf),
608 ", q=%d-%d", enc->qmin, enc->qmax);
610 bitrate = enc->bit_rate;
612 case CODEC_TYPE_AUDIO:
613 snprintf(buf, buf_size,
616 switch (enc->channels) {
618 strcpy(channels_str, "mono");
621 strcpy(channels_str, "stereo");
624 strcpy(channels_str, "5:1");
627 sprintf(channels_str, "%d channels", enc->channels);
630 if (enc->sample_rate) {
631 snprintf(buf + strlen(buf), buf_size - strlen(buf),
637 /* for PCM codecs, compute bitrate directly */
638 switch(enc->codec_id) {
639 case CODEC_ID_PCM_S16LE:
640 case CODEC_ID_PCM_S16BE:
641 case CODEC_ID_PCM_U16LE:
642 case CODEC_ID_PCM_U16BE:
643 bitrate = enc->sample_rate * enc->channels * 16;
645 case CODEC_ID_PCM_S8:
646 case CODEC_ID_PCM_U8:
647 case CODEC_ID_PCM_ALAW:
648 case CODEC_ID_PCM_MULAW:
649 bitrate = enc->sample_rate * enc->channels * 8;
652 bitrate = enc->bit_rate;
656 case CODEC_TYPE_DATA:
657 snprintf(buf, buf_size, "Data: %s", codec_name);
658 bitrate = enc->bit_rate;
664 if (enc->flags & CODEC_FLAG_PASS1)
665 snprintf(buf + strlen(buf), buf_size - strlen(buf),
667 if (enc->flags & CODEC_FLAG_PASS2)
668 snprintf(buf + strlen(buf), buf_size - strlen(buf),
672 snprintf(buf + strlen(buf), buf_size - strlen(buf),
673 ", %d kb/s", bitrate / 1000);
677 unsigned avcodec_version( void )
679 return LIBAVCODEC_VERSION_INT;
682 unsigned avcodec_build( void )
684 return LIBAVCODEC_BUILD;
687 /* must be called before any other functions */
688 void avcodec_init(void)
690 static int inited = 0;
696 dsputil_static_init();
700 * Flush buffers, should be called when seeking or when swicthing to a different stream.
702 void avcodec_flush_buffers(AVCodecContext *avctx)
704 if(avctx->codec->flush)
705 avctx->codec->flush(avctx);
708 void avcodec_default_free_buffers(AVCodecContext *s){
711 if(s->internal_buffer==NULL) return;
713 for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
714 InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
716 av_freep(&buf->base[j]);
720 av_freep(&s->internal_buffer);
722 s->internal_buffer_count=0;
725 char av_get_pict_type_char(int pict_type){
727 case I_TYPE: return 'I';
728 case P_TYPE: return 'P';
729 case B_TYPE: return 'B';
730 case S_TYPE: return 'S';
731 case SI_TYPE:return 'i';
732 case SP_TYPE:return 'p';
737 int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max){
753 gcd = ff_gcd(nom, den);
757 if(nom > max || den > max){
758 AVRational a0={0,1}, a1={1,0};
762 int64_t x= nom / den;
763 int64_t a2n= x*a1.num + a0.num;
764 int64_t a2d= x*a1.den + a0.den;
766 if(a2n > max || a2d > max) break;
771 a1= (AVRational){a2n, a2d};
773 x= nom; nom=den; den=x;
779 assert(ff_gcd(nom, den) == 1);
789 int64_t av_rescale(int64_t a, int b, int c){
794 if(a<0) return -av_rescale(-a, b, c);
797 if(h==0) return a*b/c;
805 return ((h/c)<<32) + l/c;
810 #ifdef AV_LOG_TRAP_PRINTF
815 static int av_log_level = AV_LOG_DEBUG;
817 static void av_log_default_callback(AVCodecContext* avctx, int level, const char* fmt, va_list vl)
819 static int print_prefix=1;
821 if(level>av_log_level)
823 if(avctx && print_prefix)
824 fprintf(stderr, "[%s @ %p]", avctx->codec ? avctx->codec->name : "?", avctx);
826 print_prefix= strstr(fmt, "\n") != NULL;
828 vfprintf(stderr, fmt, vl);
831 static void (*av_log_callback)(AVCodecContext*, int, const char*, va_list) = av_log_default_callback;
833 void av_log(AVCodecContext* avctx, int level, const char *fmt, ...)
837 av_vlog(avctx, level, fmt, vl);
841 void av_vlog(AVCodecContext* avctx, int level, const char *fmt, va_list vl)
843 av_log_callback(avctx, level, fmt, vl);
846 int av_log_get_level(void)
851 void av_log_set_level(int level)
853 av_log_level = level;
856 void av_log_set_callback(void (*callback)(AVCodecContext*, int, const char*, va_list))
858 av_log_callback = callback;