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https://git.ffmpeg.org/ffmpeg.git
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688 lines
18 KiB
C
688 lines
18 KiB
C
/*
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* utils for libavcodec
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* Copyright (c) 2001 Fabrice Bellard.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "avcodec.h"
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#include "dsputil.h"
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#include "mpegvideo.h"
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void *av_mallocz(unsigned int size)
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{
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void *ptr;
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if(size == 0) fprintf(stderr, "Warning, allocating 0 bytes\n");
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ptr = av_malloc(size);
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if (!ptr)
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return NULL;
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memset(ptr, 0, size);
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return ptr;
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}
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/* allocation of static arrays - do not use for normal allocation */
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static unsigned int last_static = 0;
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static char*** array_static = NULL;
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static const unsigned int grow_static = 64; // ^2
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void *__av_mallocz_static(void** location, unsigned int size)
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{
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int l = (last_static + grow_static) & ~(grow_static - 1);
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void *ptr = av_mallocz(size);
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if (!ptr)
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return NULL;
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if (location)
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{
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if (l > last_static)
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array_static = realloc(array_static, l);
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array_static[last_static++] = (char**) location;
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*location = ptr;
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}
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return ptr;
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}
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/* free all static arrays and reset pointers to 0 */
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void av_free_static()
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{
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if (array_static)
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{
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unsigned i;
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for (i = 0; i < last_static; i++)
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{
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free(*array_static[i]);
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*array_static[i] = NULL;
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}
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free(array_static);
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array_static = 0;
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}
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last_static = 0;
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}
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/* cannot call it directly because of 'void **' casting is not automatic */
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void __av_freep(void **ptr)
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{
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av_free(*ptr);
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*ptr = NULL;
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}
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/* encoder management */
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AVCodec *first_avcodec;
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void register_avcodec(AVCodec *format)
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{
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AVCodec **p;
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p = &first_avcodec;
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while (*p != NULL) p = &(*p)->next;
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*p = format;
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format->next = NULL;
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}
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typedef struct DefaultPicOpaque{
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int last_pic_num;
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uint8_t *data[4];
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}DefaultPicOpaque;
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int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic){
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int i;
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const int width = s->width;
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const int height= s->height;
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DefaultPicOpaque *opaque;
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assert(pic->data[0]==NULL);
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assert(pic->type==0 || pic->type==FF_TYPE_INTERNAL);
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if(pic->opaque){
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opaque= (DefaultPicOpaque *)pic->opaque;
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for(i=0; i<3; i++)
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pic->data[i]= opaque->data[i];
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// printf("get_buffer %X coded_pic_num:%d last:%d\n", pic->opaque, pic->coded_picture_number, opaque->last_pic_num);
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pic->age= pic->coded_picture_number - opaque->last_pic_num;
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opaque->last_pic_num= pic->coded_picture_number;
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//printf("age: %d %d %d\n", pic->age, c->picture_number, pic->coded_picture_number);
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}else{
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int align, h_chroma_shift, v_chroma_shift;
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int w, h, pixel_size;
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avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
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switch(s->pix_fmt){
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case PIX_FMT_YUV422:
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pixel_size=2;
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break;
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case PIX_FMT_RGB24:
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case PIX_FMT_BGR24:
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pixel_size=3;
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break;
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case PIX_FMT_RGBA32:
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pixel_size=4;
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break;
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default:
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pixel_size=1;
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}
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if(s->codec_id==CODEC_ID_SVQ1) align=63;
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else align=15;
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w= (width +align)&~align;
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h= (height+align)&~align;
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if(!(s->flags&CODEC_FLAG_EMU_EDGE)){
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w+= EDGE_WIDTH*2;
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h+= EDGE_WIDTH*2;
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}
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opaque= av_mallocz(sizeof(DefaultPicOpaque));
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if(opaque==NULL) return -1;
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pic->opaque= opaque;
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opaque->last_pic_num= -256*256*256*64;
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for(i=0; i<3; i++){
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int h_shift= i==0 ? 0 : h_chroma_shift;
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int v_shift= i==0 ? 0 : v_chroma_shift;
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pic->linesize[i]= pixel_size*w>>h_shift;
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pic->base[i]= av_mallocz((pic->linesize[i]*h>>v_shift)+16); //FIXME 16
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if(pic->base[i]==NULL) return -1;
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memset(pic->base[i], 128, pic->linesize[i]*h>>v_shift);
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if(s->flags&CODEC_FLAG_EMU_EDGE)
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pic->data[i] = pic->base[i] + 16; //FIXME 16
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else
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pic->data[i] = pic->base[i] + (pic->linesize[i]*EDGE_WIDTH>>v_shift) + (EDGE_WIDTH>>h_shift) + 16; //FIXME 16
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opaque->data[i]= pic->data[i];
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}
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pic->age= 256*256*256*64;
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pic->type= FF_BUFFER_TYPE_INTERNAL;
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}
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return 0;
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}
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void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic){
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int i;
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assert(pic->type==FF_BUFFER_TYPE_INTERNAL);
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for(i=0; i<3; i++)
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pic->data[i]=NULL;
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//printf("R%X\n", pic->opaque);
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}
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void avcodec_get_context_defaults(AVCodecContext *s){
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s->bit_rate= 800*1000;
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s->bit_rate_tolerance= s->bit_rate*10;
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s->qmin= 2;
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s->qmax= 31;
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s->mb_qmin= 2;
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s->mb_qmax= 31;
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s->rc_eq= "tex^qComp";
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s->qcompress= 0.5;
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s->max_qdiff= 3;
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s->b_quant_factor=1.25;
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s->b_quant_offset=1.25;
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s->i_quant_factor=-0.8;
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s->i_quant_offset=0.0;
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s->error_concealment= 3;
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s->error_resilience= 1;
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s->workaround_bugs= FF_BUG_AUTODETECT;
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s->frame_rate = 25 * FRAME_RATE_BASE;
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s->gop_size= 50;
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s->me_method= ME_EPZS;
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s->get_buffer= avcodec_default_get_buffer;
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s->release_buffer= avcodec_default_release_buffer;
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s->me_subpel_quality=8;
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}
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/**
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* allocates a AVCodecContext and set it to defaults.
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* this can be deallocated by simply calling free()
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*/
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AVCodecContext *avcodec_alloc_context(void){
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AVCodecContext *avctx= av_mallocz(sizeof(AVCodecContext));
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if(avctx==NULL) return NULL;
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avcodec_get_context_defaults(avctx);
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return avctx;
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}
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/**
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* allocates a AVPFrame and set it to defaults.
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* this can be deallocated by simply calling free()
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*/
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AVFrame *avcodec_alloc_frame(void){
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AVFrame *pic= av_mallocz(sizeof(AVFrame));
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return pic;
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}
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int avcodec_open(AVCodecContext *avctx, AVCodec *codec)
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{
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int ret;
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avctx->codec = codec;
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avctx->codec_id = codec->id;
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avctx->frame_number = 0;
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if (codec->priv_data_size > 0) {
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avctx->priv_data = av_mallocz(codec->priv_data_size);
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if (!avctx->priv_data)
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return -ENOMEM;
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} else {
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avctx->priv_data = NULL;
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}
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ret = avctx->codec->init(avctx);
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if (ret < 0) {
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av_freep(&avctx->priv_data);
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return ret;
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}
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return 0;
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}
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int avcodec_encode_audio(AVCodecContext *avctx, UINT8 *buf, int buf_size,
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const short *samples)
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{
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int ret;
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ret = avctx->codec->encode(avctx, buf, buf_size, (void *)samples);
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avctx->frame_number++;
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return ret;
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}
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int avcodec_encode_video(AVCodecContext *avctx, UINT8 *buf, int buf_size,
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const AVFrame *pict)
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{
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int ret;
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ret = avctx->codec->encode(avctx, buf, buf_size, (void *)pict);
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emms_c(); //needed to avoid a emms_c() call before every return;
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avctx->frame_number++;
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return ret;
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}
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/* decode a frame. return -1 if error, otherwise return the number of
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bytes used. If no frame could be decompressed, *got_picture_ptr is
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zero. Otherwise, it is non zero */
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int avcodec_decode_video(AVCodecContext *avctx, AVFrame *picture,
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int *got_picture_ptr,
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UINT8 *buf, int buf_size)
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{
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int ret;
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ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
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buf, buf_size);
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emms_c(); //needed to avoid a emms_c() call before every return;
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if (*got_picture_ptr)
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avctx->frame_number++;
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return ret;
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}
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/* decode an audio frame. return -1 if error, otherwise return the
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*number of bytes used. If no frame could be decompressed,
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*frame_size_ptr is zero. Otherwise, it is the decompressed frame
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*size in BYTES. */
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int avcodec_decode_audio(AVCodecContext *avctx, INT16 *samples,
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int *frame_size_ptr,
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UINT8 *buf, int buf_size)
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{
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int ret;
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ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
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buf, buf_size);
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avctx->frame_number++;
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return ret;
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}
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int avcodec_close(AVCodecContext *avctx)
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{
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if (avctx->codec->close)
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avctx->codec->close(avctx);
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av_freep(&avctx->priv_data);
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avctx->codec = NULL;
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return 0;
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}
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AVCodec *avcodec_find_encoder(enum CodecID id)
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{
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AVCodec *p;
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p = first_avcodec;
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while (p) {
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if (p->encode != NULL && p->id == id)
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return p;
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p = p->next;
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}
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return NULL;
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}
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AVCodec *avcodec_find_encoder_by_name(const char *name)
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{
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AVCodec *p;
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p = first_avcodec;
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while (p) {
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if (p->encode != NULL && strcmp(name,p->name) == 0)
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return p;
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p = p->next;
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}
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return NULL;
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}
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AVCodec *avcodec_find_decoder(enum CodecID id)
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{
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AVCodec *p;
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p = first_avcodec;
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while (p) {
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if (p->decode != NULL && p->id == id)
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return p;
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p = p->next;
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}
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return NULL;
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}
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AVCodec *avcodec_find_decoder_by_name(const char *name)
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{
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AVCodec *p;
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p = first_avcodec;
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while (p) {
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if (p->decode != NULL && strcmp(name,p->name) == 0)
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return p;
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p = p->next;
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}
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return NULL;
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}
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AVCodec *avcodec_find(enum CodecID id)
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{
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AVCodec *p;
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p = first_avcodec;
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while (p) {
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if (p->id == id)
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return p;
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p = p->next;
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}
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return NULL;
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}
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const char *pix_fmt_str[] = {
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"yuv420p",
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"yuv422",
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"rgb24",
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"bgr24",
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"yuv422p",
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"yuv444p",
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"rgba32",
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"bgra32",
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"yuv410p",
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"yuv411p",
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};
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void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
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{
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const char *codec_name;
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AVCodec *p;
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char buf1[32];
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char channels_str[100];
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int bitrate;
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if (encode)
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p = avcodec_find_encoder(enc->codec_id);
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else
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p = avcodec_find_decoder(enc->codec_id);
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if (p) {
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codec_name = p->name;
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} else if (enc->codec_name[0] != '\0') {
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codec_name = enc->codec_name;
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} else {
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/* output avi tags */
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if (enc->codec_type == CODEC_TYPE_VIDEO) {
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snprintf(buf1, sizeof(buf1), "%c%c%c%c",
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enc->codec_tag & 0xff,
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(enc->codec_tag >> 8) & 0xff,
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(enc->codec_tag >> 16) & 0xff,
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(enc->codec_tag >> 24) & 0xff);
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} else {
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snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
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}
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codec_name = buf1;
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}
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switch(enc->codec_type) {
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case CODEC_TYPE_VIDEO:
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snprintf(buf, buf_size,
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"Video: %s%s",
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codec_name, enc->flags & CODEC_FLAG_HQ ? " (hq)" : "");
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if (enc->codec_id == CODEC_ID_RAWVIDEO) {
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snprintf(buf + strlen(buf), buf_size - strlen(buf),
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", %s",
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avcodec_get_pix_fmt_name(enc->pix_fmt));
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}
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if (enc->width) {
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snprintf(buf + strlen(buf), buf_size - strlen(buf),
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", %dx%d, %0.2f fps",
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enc->width, enc->height,
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(float)enc->frame_rate / FRAME_RATE_BASE);
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}
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if (encode) {
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snprintf(buf + strlen(buf), buf_size - strlen(buf),
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", q=%d-%d", enc->qmin, enc->qmax);
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}
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bitrate = enc->bit_rate;
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break;
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case CODEC_TYPE_AUDIO:
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snprintf(buf, buf_size,
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"Audio: %s",
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codec_name);
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switch (enc->channels) {
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case 1:
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strcpy(channels_str, "mono");
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break;
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case 2:
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strcpy(channels_str, "stereo");
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break;
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case 6:
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strcpy(channels_str, "5:1");
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break;
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default:
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sprintf(channels_str, "%d channels", enc->channels);
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break;
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}
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if (enc->sample_rate) {
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snprintf(buf + strlen(buf), buf_size - strlen(buf),
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", %d Hz, %s",
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enc->sample_rate,
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channels_str);
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}
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/* for PCM codecs, compute bitrate directly */
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switch(enc->codec_id) {
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case CODEC_ID_PCM_S16LE:
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case CODEC_ID_PCM_S16BE:
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case CODEC_ID_PCM_U16LE:
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case CODEC_ID_PCM_U16BE:
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bitrate = enc->sample_rate * enc->channels * 16;
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break;
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case CODEC_ID_PCM_S8:
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case CODEC_ID_PCM_U8:
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case CODEC_ID_PCM_ALAW:
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case CODEC_ID_PCM_MULAW:
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bitrate = enc->sample_rate * enc->channels * 8;
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break;
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default:
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bitrate = enc->bit_rate;
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break;
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}
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break;
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default:
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av_abort();
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}
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if (encode) {
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if (enc->flags & CODEC_FLAG_PASS1)
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snprintf(buf + strlen(buf), buf_size - strlen(buf),
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", pass 1");
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if (enc->flags & CODEC_FLAG_PASS2)
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snprintf(buf + strlen(buf), buf_size - strlen(buf),
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", pass 2");
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}
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if (bitrate != 0) {
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snprintf(buf + strlen(buf), buf_size - strlen(buf),
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", %d kb/s", bitrate / 1000);
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}
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}
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/* Picture field are filled with 'ptr' addresses */
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void avpicture_fill(AVPicture *picture, UINT8 *ptr,
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int pix_fmt, int width, int height)
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{
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int size;
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size = width * height;
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switch(pix_fmt) {
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case PIX_FMT_YUV420P:
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picture->data[0] = ptr;
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picture->data[1] = picture->data[0] + size;
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picture->data[2] = picture->data[1] + size / 4;
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picture->linesize[0] = width;
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picture->linesize[1] = width / 2;
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picture->linesize[2] = width / 2;
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break;
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case PIX_FMT_YUV422P:
|
|
picture->data[0] = ptr;
|
|
picture->data[1] = picture->data[0] + size;
|
|
picture->data[2] = picture->data[1] + size / 2;
|
|
picture->linesize[0] = width;
|
|
picture->linesize[1] = width / 2;
|
|
picture->linesize[2] = width / 2;
|
|
break;
|
|
case PIX_FMT_YUV444P:
|
|
picture->data[0] = ptr;
|
|
picture->data[1] = picture->data[0] + size;
|
|
picture->data[2] = picture->data[1] + size;
|
|
picture->linesize[0] = width;
|
|
picture->linesize[1] = width;
|
|
picture->linesize[2] = width;
|
|
break;
|
|
case PIX_FMT_RGB24:
|
|
case PIX_FMT_BGR24:
|
|
picture->data[0] = ptr;
|
|
picture->data[1] = NULL;
|
|
picture->data[2] = NULL;
|
|
picture->linesize[0] = width * 3;
|
|
break;
|
|
case PIX_FMT_RGBA32:
|
|
picture->data[0] = ptr;
|
|
picture->data[1] = NULL;
|
|
picture->data[2] = NULL;
|
|
picture->linesize[0] = width * 4;
|
|
break;
|
|
case PIX_FMT_YUV422:
|
|
picture->data[0] = ptr;
|
|
picture->data[1] = NULL;
|
|
picture->data[2] = NULL;
|
|
picture->linesize[0] = width * 2;
|
|
break;
|
|
default:
|
|
picture->data[0] = NULL;
|
|
picture->data[1] = NULL;
|
|
picture->data[2] = NULL;
|
|
break;
|
|
}
|
|
}
|
|
|
|
int avpicture_get_size(int pix_fmt, int width, int height)
|
|
{
|
|
int size;
|
|
|
|
size = width * height;
|
|
switch(pix_fmt) {
|
|
case PIX_FMT_YUV420P:
|
|
size = (size * 3) / 2;
|
|
break;
|
|
case PIX_FMT_YUV422P:
|
|
size = (size * 2);
|
|
break;
|
|
case PIX_FMT_YUV444P:
|
|
size = (size * 3);
|
|
break;
|
|
case PIX_FMT_RGB24:
|
|
case PIX_FMT_BGR24:
|
|
size = (size * 3);
|
|
break;
|
|
case PIX_FMT_RGBA32:
|
|
size = (size * 4);
|
|
break;
|
|
case PIX_FMT_YUV422:
|
|
size = (size * 2);
|
|
break;
|
|
default:
|
|
size = -1;
|
|
break;
|
|
}
|
|
return size;
|
|
}
|
|
|
|
unsigned avcodec_version( void )
|
|
{
|
|
return LIBAVCODEC_VERSION_INT;
|
|
}
|
|
|
|
unsigned avcodec_build( void )
|
|
{
|
|
return LIBAVCODEC_BUILD;
|
|
}
|
|
|
|
/* must be called before any other functions */
|
|
void avcodec_init(void)
|
|
{
|
|
static int inited = 0;
|
|
|
|
if (inited != 0)
|
|
return;
|
|
inited = 1;
|
|
|
|
//dsputil_init();
|
|
}
|
|
|
|
/* this can be called after seeking and before trying to decode the next keyframe */
|
|
void avcodec_flush_buffers(AVCodecContext *avctx)
|
|
{
|
|
int i;
|
|
MpegEncContext *s = avctx->priv_data;
|
|
|
|
switch(avctx->codec_id){
|
|
case CODEC_ID_MPEG1VIDEO:
|
|
case CODEC_ID_H263:
|
|
case CODEC_ID_RV10:
|
|
case CODEC_ID_MJPEG:
|
|
case CODEC_ID_MJPEGB:
|
|
case CODEC_ID_MPEG4:
|
|
case CODEC_ID_MSMPEG4V1:
|
|
case CODEC_ID_MSMPEG4V2:
|
|
case CODEC_ID_MSMPEG4V3:
|
|
case CODEC_ID_WMV1:
|
|
case CODEC_ID_WMV2:
|
|
case CODEC_ID_H263P:
|
|
case CODEC_ID_H263I:
|
|
case CODEC_ID_SVQ1:
|
|
for(i=0; i<MAX_PICTURE_COUNT; i++){
|
|
if(s->picture[i].data[0] && ( s->picture[i].type == FF_BUFFER_TYPE_INTERNAL
|
|
|| s->picture[i].type == FF_BUFFER_TYPE_USER))
|
|
avctx->release_buffer(avctx, (AVFrame*)&s->picture[i]);
|
|
}
|
|
s->last_picture.data[0] = s->next_picture.data[0] = NULL;
|
|
break;
|
|
default:
|
|
//FIXME
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int raw_encode_init(AVCodecContext *s)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int raw_decode_frame(AVCodecContext *avctx,
|
|
void *data, int *data_size,
|
|
UINT8 *buf, int buf_size)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
static int raw_encode_frame(AVCodecContext *avctx,
|
|
unsigned char *frame, int buf_size, void *data)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
AVCodec rawvideo_codec = {
|
|
"rawvideo",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_RAWVIDEO,
|
|
0,
|
|
raw_encode_init,
|
|
raw_encode_frame,
|
|
NULL,
|
|
raw_decode_frame,
|
|
};
|