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H264 decoder & demuxer

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Originally committed as revision 1732 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer
2003-04-04 14:42:28 +00:00
parent 6aafe463e5
commit 0da71265d8
13 changed files with 5904 additions and 16 deletions
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42
libavcodec/mpegvideo.c
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@@ -227,7 +227,9 @@ int DCT_common_init(MpegEncContext *s)
* The pixels are allocated/set by calling get_buffer() if shared=0
*/
static int alloc_picture(MpegEncContext *s, Picture *pic, int shared){
const int big_mb_num= (s->mb_width+1)*(s->mb_height+1);
int i;
if(shared){
assert(pic->data[0]);
assert(pic->type == 0 || pic->type == FF_BUFFER_TYPE_SHARED);
@@ -268,9 +270,17 @@ static int alloc_picture(MpegEncContext *s, Picture *pic, int shared){
CHECKED_ALLOCZ(pic->mbskip_table , s->mb_num * sizeof(uint8_t)+1) //the +1 is for the slice end check
CHECKED_ALLOCZ(pic->qscale_table , s->mb_num * sizeof(uint8_t))
if(s->out_format == FMT_H264){
CHECKED_ALLOCZ(pic->mb_type_base , big_mb_num * sizeof(uint16_t))
pic->mb_type= pic->mb_type_base + s->mb_width+2;
for(i=0; i<2; i++){
CHECKED_ALLOCZ(pic->motion_val[i], 2 * 16 * s->mb_num * sizeof(uint16_t))
CHECKED_ALLOCZ(pic->ref_index[i] , 4 * s->mb_num * sizeof(uint8_t))
}
}
pic->qstride= s->mb_width;
}
//it might be nicer if the application would keep track of these but it would require a API change
memmove(s->prev_pict_types+1, s->prev_pict_types, PREV_PICT_TYPES_BUFFER_SIZE-1);
s->prev_pict_types[0]= s->pict_type;
@@ -298,7 +308,13 @@ static void free_picture(MpegEncContext *s, Picture *pic){
av_freep(&pic->mb_cmp_score);
av_freep(&pic->mbskip_table);
av_freep(&pic->qscale_table);
av_freep(&pic->mb_type_base);
pic->mb_type= NULL;
for(i=0; i<2; i++){
av_freep(&pic->motion_val[i]);
av_freep(&pic->ref_index[i]);
}
if(pic->type == FF_BUFFER_TYPE_INTERNAL){
for(i=0; i<4; i++){
av_freep(&pic->base[i]);
@@ -855,7 +871,7 @@ static int find_unused_picture(MpegEncContext *s, int shared){
}
}else{
for(i=0; i<MAX_PICTURE_COUNT; i++){
if(s->picture[i].data[0]==NULL && s->picture[i].type!=0) break;
if(s->picture[i].data[0]==NULL && s->picture[i].type!=0) break; //FIXME
}
for(i=0; i<MAX_PICTURE_COUNT; i++){
if(s->picture[i].data[0]==NULL) break;
@@ -873,7 +889,9 @@ int MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx)
AVFrame *pic;
s->mb_skiped = 0;
assert(s->last_picture_ptr==NULL || s->out_format != FMT_H264);
/* mark&release old frames */
if (s->pict_type != B_TYPE && s->last_picture_ptr) {
avctx->release_buffer(avctx, (AVFrame*)s->last_picture_ptr);
@@ -895,7 +913,7 @@ alloc:
i= find_unused_picture(s, 0);
pic= (AVFrame*)&s->picture[i];
pic->reference= s->pict_type != B_TYPE;
pic->reference= s->pict_type != B_TYPE ? 3 : 0;
if(s->current_picture_ptr)
pic->coded_picture_number= s->current_picture_ptr->coded_picture_number+1;
@@ -905,11 +923,12 @@ alloc:
s->current_picture_ptr= &s->picture[i];
}
s->current_picture= *s->current_picture_ptr;
if(s->out_format != FMT_H264){
if (s->pict_type != B_TYPE) {
s->last_picture_ptr= s->next_picture_ptr;
s->next_picture_ptr= s->current_picture_ptr;
}
s->current_picture= *s->current_picture_ptr;
if(s->last_picture_ptr) s->last_picture= *s->last_picture_ptr;
if(s->next_picture_ptr) s->next_picture= *s->next_picture_ptr;
if(s->new_picture_ptr ) s->new_picture = *s->new_picture_ptr;
@@ -931,6 +950,7 @@ alloc:
assert(s->pict_type != B_TYPE); //these should have been dropped if we dont have a reference
goto alloc;
}
}
s->hurry_up= s->avctx->hurry_up;
s->error_resilience= avctx->error_resilience;
@@ -1059,7 +1079,7 @@ static int load_input_picture(MpegEncContext *s, AVFrame *pic_arg){
i= find_unused_picture(s, 1);
pic= (AVFrame*)&s->picture[i];
pic->reference= 1;
pic->reference= 3;
for(i=0; i<4; i++){
pic->data[i]= pic_arg->data[i];
@@ -1070,7 +1090,7 @@ static int load_input_picture(MpegEncContext *s, AVFrame *pic_arg){
i= find_unused_picture(s, 0);
pic= (AVFrame*)&s->picture[i];
pic->reference= 1;
pic->reference= 3;
alloc_picture(s, (Picture*)pic, 0);
for(i=0; i<4; i++){
@@ -1215,7 +1235,7 @@ static void select_input_picture(MpegEncContext *s){
}
if(s->reordered_input_picture[0]){
s->reordered_input_picture[0]->reference= s->reordered_input_picture[0]->pict_type!=B_TYPE;
s->reordered_input_picture[0]->reference= s->reordered_input_picture[0]->pict_type!=B_TYPE ? 3 : 0;
s->new_picture= *s->reordered_input_picture[0];
@@ -3944,6 +3964,8 @@ char ff_get_pict_type_char(int pict_type){
case P_TYPE: return 'P';
case B_TYPE: return 'B';
case S_TYPE: return 'S';
case SI_TYPE:return 'i';
case SP_TYPE:return 'p';
default: return '?';
}
}