h->slice_type= old_slice_type;
s->mb_x= 0;
s->mb_y= end_mb_y - FRAME_MBAFF;
+ h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
+ h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
}
static int decode_slice(struct AVCodecContext *avctx, void *arg){
if( cbp_b == 2 ) ctx += 2;
return 1 + get_cabac_noinline( &h->cabac, &h->cabac_state[77 + ctx] );
}
-static int decode_cabac_mb_dqp( H264Context *h) {
- int ctx= h->last_qscale_diff != 0;
- int val = 0;
-
- while( get_cabac_noinline( &h->cabac, &h->cabac_state[60 + ctx] ) ) {
- ctx= 2+(ctx>>1);
- val++;
- if(val > 102) //prevent infinite loop
- return INT_MIN;
- }
- if( val&0x01 )
- return (val + 1)>>1 ;
- else
- return -((val + 1)>>1);
-}
static int decode_cabac_p_mb_sub_type( H264Context *h ) {
if( get_cabac( &h->cabac, &h->cabac_state[21] ) )
return 0; /* 8x8 */
if( cbp || IS_INTRA16x16( mb_type ) ) {
const uint8_t *scan, *scan8x8, *dc_scan;
const uint32_t *qmul;
- int dqp;
if(IS_INTERLACED(mb_type)){
scan8x8= s->qscale ? h->field_scan8x8 : h->field_scan8x8_q0;
dc_scan= luma_dc_zigzag_scan;
}
- h->last_qscale_diff = dqp = decode_cabac_mb_dqp( h );
- if( dqp == INT_MIN ){
- av_log(h->s.avctx, AV_LOG_ERROR, "cabac decode of qscale diff failed at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
- s->qscale += dqp;
+ // decode_cabac_mb_dqp
+ if(get_cabac_noinline( &h->cabac, &h->cabac_state[60 + (h->last_qscale_diff != 0)])){
+ int val = 1;
+ int ctx= 2;
+
+ while( get_cabac_noinline( &h->cabac, &h->cabac_state[60 + ctx] ) ) {
+ ctx= 3;
+ val++;
+ if(val > 102){ //prevent infinite loop
+ av_log(h->s.avctx, AV_LOG_ERROR, "cabac decode of qscale diff failed at %d %d\n", s->mb_x, s->mb_y);
+ return -1;
+ }
+ }
+
+ if( val&0x01 )
+ val= (val + 1)>>1 ;
+ else
+ val= -((val + 1)>>1);
+ h->last_qscale_diff = val;
+ s->qscale += val;
if(((unsigned)s->qscale) > 51){
if(s->qscale<0) s->qscale+= 52;
else s->qscale-= 52;
}
h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
+ }else
+ h->last_qscale_diff=0;
if( IS_INTRA16x16( mb_type ) ) {
int i;