3 * Copyright (c) 2001 Fabrice Bellard.
4 * Copyright (c) 2003 Michel Bardiaux for the av_log API
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
28 #include "mpegvideo.h"
31 void *av_mallocz(unsigned int size)
35 ptr = av_malloc(size);
42 char *av_strdup(const char *s)
55 * realloc which does nothing if the block is large enough
57 void *av_fast_realloc(void *ptr, unsigned int *size, unsigned int min_size)
62 *size= min_size + 10*1024;
64 return av_realloc(ptr, *size);
68 /* allocation of static arrays - do not use for normal allocation */
69 static unsigned int last_static = 0;
70 static char*** array_static = NULL;
71 static const unsigned int grow_static = 64; // ^2
72 void *__av_mallocz_static(void** location, unsigned int size)
74 unsigned int l = (last_static + grow_static) & ~(grow_static - 1);
75 void *ptr = av_mallocz(size);
82 array_static = av_realloc(array_static, l);
83 array_static[last_static++] = (char**) location;
88 /* free all static arrays and reset pointers to 0 */
89 void av_free_static(void)
94 for (i = 0; i < last_static; i++)
96 av_free(*array_static[i]);
97 *array_static[i] = NULL;
99 av_free(array_static);
105 /* cannot call it directly because of 'void **' casting is not automatic */
106 void __av_freep(void **ptr)
112 /* encoder management */
113 AVCodec *first_avcodec;
115 void register_avcodec(AVCodec *format)
119 while (*p != NULL) p = &(*p)->next;
124 typedef struct InternalBuffer{
131 #define INTERNAL_BUFFER_SIZE 32
133 #define ALIGN(x, a) (((x)+(a)-1)&~((a)-1))
135 void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
140 case PIX_FMT_YUV420P:
142 case PIX_FMT_YUV422P:
143 case PIX_FMT_YUV444P:
145 case PIX_FMT_YUVJ420P:
146 case PIX_FMT_YUVJ422P:
147 case PIX_FMT_YUVJ444P:
148 w_align= 16; //FIXME check for non mpeg style codecs and use less alignment
151 case PIX_FMT_YUV411P:
155 case PIX_FMT_YUV410P:
156 if(s->codec_id == CODEC_ID_SVQ1){
167 *width = ALIGN(*width , w_align);
168 *height= ALIGN(*height, h_align);
171 int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
178 assert(pic->data[0]==NULL);
179 assert(INTERNAL_BUFFER_SIZE > s->internal_buffer_count);
181 if(s->internal_buffer==NULL){
182 s->internal_buffer= av_mallocz(INTERNAL_BUFFER_SIZE*sizeof(InternalBuffer));
185 s->internal_buffer= av_fast_realloc(
187 &s->internal_buffer_size,
188 sizeof(InternalBuffer)*FFMAX(99, s->internal_buffer_count+1)/*FIXME*/
192 buf= &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
193 picture_number= &(((InternalBuffer*)s->internal_buffer)[INTERNAL_BUFFER_SIZE-1]).last_pic_num; //FIXME ugly hack
197 pic->age= *picture_number - buf->last_pic_num;
198 buf->last_pic_num= *picture_number;
200 int h_chroma_shift, v_chroma_shift;
201 int s_align, pixel_size;
203 avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
222 avcodec_align_dimensions(s, &w, &h);
223 #if defined(ARCH_POWERPC) || defined(HAVE_MMI) //FIXME some cleaner check
229 if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
234 buf->last_pic_num= -256*256*256*64;
237 const int h_shift= i==0 ? 0 : h_chroma_shift;
238 const int v_shift= i==0 ? 0 : v_chroma_shift;
240 buf->linesize[i]= ALIGN(pixel_size*w>>h_shift, s_align);
242 buf->base[i]= av_mallocz((buf->linesize[i]*h>>v_shift)+16); //FIXME 16
243 if(buf->base[i]==NULL) return -1;
244 memset(buf->base[i], 128, buf->linesize[i]*h>>v_shift);
246 if(s->flags&CODEC_FLAG_EMU_EDGE)
247 buf->data[i] = buf->base[i];
249 buf->data[i] = buf->base[i] + ALIGN((buf->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift), s_align);
251 pic->age= 256*256*256*64;
253 pic->type= FF_BUFFER_TYPE_INTERNAL;
256 pic->base[i]= buf->base[i];
257 pic->data[i]= buf->data[i];
258 pic->linesize[i]= buf->linesize[i];
260 s->internal_buffer_count++;
265 void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
267 InternalBuffer *buf, *last, temp;
269 assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
270 assert(s->internal_buffer_count);
272 buf = NULL; /* avoids warning */
273 for(i=0; i<s->internal_buffer_count; i++){ //just 3-5 checks so is not worth to optimize
274 buf= &((InternalBuffer*)s->internal_buffer)[i];
275 if(buf->data[0] == pic->data[0])
278 assert(i < s->internal_buffer_count);
279 s->internal_buffer_count--;
280 last = &((InternalBuffer*)s->internal_buffer)[s->internal_buffer_count];
288 // pic->base[i]=NULL;
290 //printf("R%X\n", pic->opaque);
293 enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, enum PixelFormat * fmt){
297 void avcodec_get_context_defaults(AVCodecContext *s){
298 s->bit_rate= 800*1000;
299 s->bit_rate_tolerance= s->bit_rate*10;
304 s->rc_eq= "tex^qComp";
307 s->b_quant_factor=1.25;
308 s->b_quant_offset=1.25;
309 s->i_quant_factor=-0.8;
310 s->i_quant_offset=0.0;
311 s->error_concealment= 3;
312 s->error_resilience= 1;
313 s->workaround_bugs= FF_BUG_AUTODETECT;
314 s->frame_rate_base= 1;
317 s->me_method= ME_EPZS;
318 s->get_buffer= avcodec_default_get_buffer;
319 s->release_buffer= avcodec_default_release_buffer;
320 s->get_format= avcodec_default_get_format;
321 s->me_subpel_quality=8;
322 s->lmin= FF_QP2LAMBDA * s->qmin;
323 s->lmax= FF_QP2LAMBDA * s->qmax;
324 s->sample_aspect_ratio= (AVRational){0,1};
326 s->intra_quant_bias= FF_DEFAULT_QUANT_BIAS;
327 s->inter_quant_bias= FF_DEFAULT_QUANT_BIAS;
332 * allocates a AVCodecContext and set it to defaults.
333 * this can be deallocated by simply calling free()
335 AVCodecContext *avcodec_alloc_context(void){
336 AVCodecContext *avctx= av_mallocz(sizeof(AVCodecContext));
338 if(avctx==NULL) return NULL;
340 avcodec_get_context_defaults(avctx);
346 * allocates a AVPFrame and set it to defaults.
347 * this can be deallocated by simply calling free()
349 AVFrame *avcodec_alloc_frame(void){
350 AVFrame *pic= av_mallocz(sizeof(AVFrame));
355 int avcodec_open(AVCodecContext *avctx, AVCodec *codec)
362 avctx->codec = codec;
363 avctx->codec_id = codec->id;
364 avctx->frame_number = 0;
365 if (codec->priv_data_size > 0) {
366 avctx->priv_data = av_mallocz(codec->priv_data_size);
367 if (!avctx->priv_data)
370 avctx->priv_data = NULL;
372 ret = avctx->codec->init(avctx);
374 av_freep(&avctx->priv_data);
380 int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size,
381 const short *samples)
385 ret = avctx->codec->encode(avctx, buf, buf_size, (void *)samples);
386 avctx->frame_number++;
390 int avcodec_encode_video(AVCodecContext *avctx, uint8_t *buf, int buf_size,
395 ret = avctx->codec->encode(avctx, buf, buf_size, (void *)pict);
397 emms_c(); //needed to avoid a emms_c() call before every return;
399 avctx->frame_number++;
405 * @param buf bitstream buffer, must be FF_INPUT_BUFFER_PADDING_SIZE larger then the actual read bytes
406 * because some optimized bitstream readers read 32 or 64 bit at once and could read over the end
407 * @param buf_size the size of the buffer in bytes
408 * @param got_picture_ptr zero if no frame could be decompressed, Otherwise, it is non zero
409 * @return -1 if error, otherwise return the number of
412 int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
413 int *got_picture_ptr,
414 uint8_t *buf, int buf_size)
418 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
421 emms_c(); //needed to avoid a emms_c() call before every return;
423 if (*got_picture_ptr)
424 avctx->frame_number++;
428 /* decode an audio frame. return -1 if error, otherwise return the
429 *number of bytes used. If no frame could be decompressed,
430 *frame_size_ptr is zero. Otherwise, it is the decompressed frame
432 int avcodec_decode_audio(AVCodecContext *avctx, int16_t *samples,
434 uint8_t *buf, int buf_size)
438 ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
440 avctx->frame_number++;
444 int avcodec_close(AVCodecContext *avctx)
446 if (avctx->codec->close)
447 avctx->codec->close(avctx);
448 av_freep(&avctx->priv_data);
453 AVCodec *avcodec_find_encoder(enum CodecID id)
458 if (p->encode != NULL && p->id == id)
465 AVCodec *avcodec_find_encoder_by_name(const char *name)
470 if (p->encode != NULL && strcmp(name,p->name) == 0)
477 AVCodec *avcodec_find_decoder(enum CodecID id)
482 if (p->decode != NULL && p->id == id)
489 AVCodec *avcodec_find_decoder_by_name(const char *name)
494 if (p->decode != NULL && strcmp(name,p->name) == 0)
501 AVCodec *avcodec_find(enum CodecID id)
513 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
515 const char *codec_name;
518 char channels_str[100];
522 p = avcodec_find_encoder(enc->codec_id);
524 p = avcodec_find_decoder(enc->codec_id);
527 codec_name = p->name;
528 if (!encode && enc->codec_id == CODEC_ID_MP3) {
529 if (enc->sub_id == 2)
531 else if (enc->sub_id == 1)
534 } else if (enc->codec_id == CODEC_ID_MPEG2TS) {
535 /* fake mpeg2 transport stream codec (currently not
537 codec_name = "mpeg2ts";
538 } else if (enc->codec_name[0] != '\0') {
539 codec_name = enc->codec_name;
541 /* output avi tags */
542 if (enc->codec_type == CODEC_TYPE_VIDEO) {
543 snprintf(buf1, sizeof(buf1), "%c%c%c%c",
544 enc->codec_tag & 0xff,
545 (enc->codec_tag >> 8) & 0xff,
546 (enc->codec_tag >> 16) & 0xff,
547 (enc->codec_tag >> 24) & 0xff);
549 snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
554 switch(enc->codec_type) {
555 case CODEC_TYPE_VIDEO:
556 snprintf(buf, buf_size,
558 codec_name, enc->mb_decision ? " (hq)" : "");
559 if (enc->codec_id == CODEC_ID_RAWVIDEO) {
560 snprintf(buf + strlen(buf), buf_size - strlen(buf),
562 avcodec_get_pix_fmt_name(enc->pix_fmt));
565 snprintf(buf + strlen(buf), buf_size - strlen(buf),
566 ", %dx%d, %0.2f fps",
567 enc->width, enc->height,
568 (float)enc->frame_rate / enc->frame_rate_base);
571 snprintf(buf + strlen(buf), buf_size - strlen(buf),
572 ", q=%d-%d", enc->qmin, enc->qmax);
574 bitrate = enc->bit_rate;
576 case CODEC_TYPE_AUDIO:
577 snprintf(buf, buf_size,
580 switch (enc->channels) {
582 strcpy(channels_str, "mono");
585 strcpy(channels_str, "stereo");
588 strcpy(channels_str, "5:1");
591 sprintf(channels_str, "%d channels", enc->channels);
594 if (enc->sample_rate) {
595 snprintf(buf + strlen(buf), buf_size - strlen(buf),
601 /* for PCM codecs, compute bitrate directly */
602 switch(enc->codec_id) {
603 case CODEC_ID_PCM_S16LE:
604 case CODEC_ID_PCM_S16BE:
605 case CODEC_ID_PCM_U16LE:
606 case CODEC_ID_PCM_U16BE:
607 bitrate = enc->sample_rate * enc->channels * 16;
609 case CODEC_ID_PCM_S8:
610 case CODEC_ID_PCM_U8:
611 case CODEC_ID_PCM_ALAW:
612 case CODEC_ID_PCM_MULAW:
613 bitrate = enc->sample_rate * enc->channels * 8;
616 bitrate = enc->bit_rate;
620 case CODEC_TYPE_DATA:
621 snprintf(buf, buf_size, "Data: %s", codec_name);
622 bitrate = enc->bit_rate;
628 if (enc->flags & CODEC_FLAG_PASS1)
629 snprintf(buf + strlen(buf), buf_size - strlen(buf),
631 if (enc->flags & CODEC_FLAG_PASS2)
632 snprintf(buf + strlen(buf), buf_size - strlen(buf),
636 snprintf(buf + strlen(buf), buf_size - strlen(buf),
637 ", %d kb/s", bitrate / 1000);
641 unsigned avcodec_version( void )
643 return LIBAVCODEC_VERSION_INT;
646 unsigned avcodec_build( void )
648 return LIBAVCODEC_BUILD;
651 /* must be called before any other functions */
652 void avcodec_init(void)
654 static int inited = 0;
660 dsputil_static_init();
664 * Flush buffers, should be called when seeking or when swicthing to a different stream.
666 void avcodec_flush_buffers(AVCodecContext *avctx)
668 if(avctx->codec->flush)
669 avctx->codec->flush(avctx);
672 void avcodec_default_free_buffers(AVCodecContext *s){
675 if(s->internal_buffer==NULL) return;
677 for(i=0; i<INTERNAL_BUFFER_SIZE; i++){
678 InternalBuffer *buf= &((InternalBuffer*)s->internal_buffer)[i];
680 av_freep(&buf->base[j]);
684 av_freep(&s->internal_buffer);
686 s->internal_buffer_count=0;
689 char av_get_pict_type_char(int pict_type){
691 case I_TYPE: return 'I';
692 case P_TYPE: return 'P';
693 case B_TYPE: return 'B';
694 case S_TYPE: return 'S';
695 case SI_TYPE:return 'i';
696 case SP_TYPE:return 'p';
701 int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max){
717 gcd = ff_gcd(nom, den);
721 if(nom > max || den > max){
722 AVRational a0={0,1}, a1={1,0};
726 int64_t x= nom / den;
727 int64_t a2n= x*a1.num + a0.num;
728 int64_t a2d= x*a1.den + a0.den;
730 if(a2n > max || a2d > max) break;
735 a1= (AVRational){a2n, a2d};
737 x= nom; nom=den; den=x;
743 assert(ff_gcd(nom, den) == 1);
753 int64_t av_rescale(int64_t a, int b, int c){
758 if(a<0) return -av_rescale(-a, b, c);
761 if(h==0) return a*b/c;
769 return ((h/c)<<32) + l/c;
774 #ifdef AV_LOG_TRAP_PRINTF
779 static int av_log_level = AV_LOG_DEBUG;
781 static void av_log_default_callback(AVCodecContext* avctx, int level, const char* fmt, va_list vl)
783 static int print_prefix=1;
785 if(level>av_log_level)
787 if(avctx && print_prefix)
788 fprintf(stderr, "[%s @ %p]", avctx->codec->name, avctx);
790 print_prefix= (int)strstr(fmt, "\n");
792 vfprintf(stderr, fmt, vl);
795 static void (*av_log_callback)(AVCodecContext*, int, const char*, va_list) = av_log_default_callback;
797 void av_log(AVCodecContext* avctx, int level, const char *fmt, ...)
801 av_vlog(avctx, level, fmt, vl);
805 void av_vlog(AVCodecContext* avctx, int level, const char *fmt, va_list vl)
807 av_log_callback(avctx, level, fmt, vl);
810 int av_log_get_level(void)
815 void av_log_set_level(int level)
817 av_log_level = level;
820 void av_log_set_callback(void (*callback)(AVCodecContext*, int, const char*, va_list))
822 av_log_callback = callback;