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Code Issues Releases Activity

clip input motion vectors

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be somewhat more tollerant on invalid input
return INT_MAX instead of -1 for unuseable mv/mb types as that ensures nicely that they arent used
initalize limits earlier for b frames
a few more asserts to check for out of picture vectors

Originally committed as revision 3213 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2004-06-10 22:56:43 +00:00
parent c60d6ad4bc
commit ae1dbde1cf
2 changed files with 27 additions and 3 deletions
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26
libavcodec/motion_est.c
View File

@ -980,6 +980,16 @@ static int interlaced_search(MpegEncContext *s, int ref_index,
}
}
static void clip_input_mv(MpegEncContext * s, int16_t *mv, int interlaced){
int ymax= s->me.ymax>>interlaced;
int ymin= s->me.ymin>>interlaced;
if(mv[0] < s->me.xmin) mv[0] = s->me.xmin;
if(mv[0] > s->me.xmax) mv[0] = s->me.xmax;
if(mv[1] < ymin) mv[1] = ymin;
if(mv[1] > ymax) mv[1] = ymax;
}
static inline int check_input_motion(MpegEncContext * s, int mb_x, int mb_y, int p_type){
MotionEstContext * const c= &s->me;
Picture *p= s->current_picture_ptr;
@ -994,9 +1004,18 @@ static inline int check_input_motion(MpegEncContext * s, int mb_x, int mb_y, int
me_cmp_func cmpf= s->dsp.sse[0];
me_cmp_func chroma_cmpf= s->dsp.sse[1];
assert(p_type==0 || !USES_LIST(mb_type, 1));
if(p_type && USES_LIST(mb_type, 1)){
av_log(c->avctx, AV_LOG_ERROR, "backward motion vector in P frame\n");
return INT_MAX;
}
assert(IS_INTRA(mb_type) || USES_LIST(mb_type,0) || USES_LIST(mb_type,1));
for(i=0; i<4; i++){
int xy= s->block_index[i];
clip_input_mv(s, p->motion_val[0][xy], !!IS_INTERLACED(mb_type));
clip_input_mv(s, p->motion_val[1][xy], !!IS_INTERLACED(mb_type));
}
if(IS_INTERLACED(mb_type)){
int xy2= xy + s->b8_stride;
s->mb_type[mb_xy]=CANDIDATE_MB_TYPE_INTRA;
@ -1005,7 +1024,7 @@ static inline int check_input_motion(MpegEncContext * s, int mb_x, int mb_y, int
if(!(s->flags & CODEC_FLAG_INTERLACED_ME)){
av_log(c->avctx, AV_LOG_ERROR, "Interlaced macroblock selected but interlaced motion estimation disabled\n");
return -1;
return INT_MAX;
}
if(USES_LIST(mb_type, 0)){
@ -1066,7 +1085,7 @@ static inline int check_input_motion(MpegEncContext * s, int mb_x, int mb_y, int
}else if(IS_8X8(mb_type)){
if(!(s->flags & CODEC_FLAG_4MV)){
av_log(c->avctx, AV_LOG_ERROR, "4MV macroblock selected but 4MV encoding disabled\n");
return -1;
return INT_MAX;
}
cmpf= s->dsp.sse[1];
chroma_cmpf= s->dsp.sse[1];
@ -1723,6 +1742,7 @@ void ff_estimate_b_frame_motion(MpegEncContext * s,
const int xy = mb_y*s->mb_stride + mb_x;
init_ref(c, s->new_picture.data, s->last_picture.data, s->next_picture.data, 16*mb_x, 16*mb_y, 2);
get_limits(s, 16*mb_x, 16*mb_y);
c->skip=0;
if(c->avctx->me_threshold){

4
libavcodec/motion_est_template.c
View File

@ -487,6 +487,10 @@ static int qpel_motion_search(MpegEncContext * s,
{\
const int key= ((y)<<ME_MAP_MV_BITS) + (x) + map_generation;\
const int index= (((y)<<ME_MAP_SHIFT) + (x))&(ME_MAP_SIZE-1);\
assert((x) >= xmin);\
assert((x) <= xmax);\
assert((y) >= ymin);\
assert((y) <= ymax);\
/*printf("check_mv %d %d\n", x, y);*/\
if(map[index]!=key){\
d= cmp(s, x, y, 0, 0, size, h, ref_index, src_index, cmpf, chroma_cmpf, flags);\