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support skiping of mb rows during decoding

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Originally committed as revision 3253 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2004-06-26 02:20:38 +00:00
parent 75293f05f9
commit 0dfd33c3f1
3 changed files with 24 additions and 4 deletions
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16
libavcodec/avcodec.h
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@ -17,7 +17,7 @@ extern "C" {
#define FFMPEG_VERSION_INT 0x000408
#define FFMPEG_VERSION "0.4.8"
#define LIBAVCODEC_BUILD 4716
#define LIBAVCODEC_BUILD 4717
#define LIBAVCODEC_VERSION_INT FFMPEG_VERSION_INT
#define LIBAVCODEC_VERSION FFMPEG_VERSION
@ -1605,6 +1605,20 @@ typedef struct AVCodecContext {
* - decoding: unused
*/
int nsse_weight;
/**
* number of macroblock rows at the top which are skiped.
* - encoding: unused
* - decoding: set by user
*/
int skip_top;
/**
* number of macroblock rows at the bottom which are skiped.
* - encoding: unused
* - decoding: set by user
*/
int skip_bottom;
} AVCodecContext;

7
libavcodec/error_resilience.c
View File

@ -652,7 +652,7 @@ void ff_er_add_slice(MpegEncContext *s, int startx, int starty, int endx, int en
s->error_status_table[start_xy] |= VP_START;
if(start_xy > 0 && s->avctx->thread_count <= 1){
if(start_xy > 0 && s->avctx->thread_count <= 1 && s->avctx->skip_top*s->mb_width < start_i){
int prev_status= s->error_status_table[ s->mb_index2xy[start_i - 1] ];
prev_status &= ~ VP_START;
@ -667,9 +667,10 @@ void ff_er_frame_end(MpegEncContext *s){
int threshold= 50;
int is_intra_likely;
if(!s->error_resilience || s->error_count==0) return;
if(!s->error_resilience || s->error_count==0 ||
s->error_count==3*s->mb_width*(s->avctx->skip_top + s->avctx->skip_bottom)) return;
av_log(s->avctx, AV_LOG_INFO, "concealing errors\n");
av_log(s->avctx, AV_LOG_INFO, "concealing %d errors\n", s->error_count);
if(s->current_picture.motion_val[0] == NULL){
int size = s->b8_stride * 2 * s->mb_height;

5
libavcodec/mpeg12.c
View File

@ -2869,6 +2869,11 @@ static int mpeg_decode_frame(AVCodecContext *avctx,
if(avctx->hurry_up>=5) break;
if (!s->mpeg_enc_ctx_allocated) break;
if(s2->codec_id == CODEC_ID_MPEG2VIDEO){
if(mb_y < avctx->skip_top || mb_y >= s2->mb_height - avctx->skip_bottom)
break;
}
if(s2->first_slice){
s2->first_slice=0;