diff options
| author | Kostya Shishkov <kostya.shishkov@gmail.com> | 2006-11-26 04:52:36 +0000 |
|---|---|---|
| committer | Kostya Shishkov <kostya.shishkov@gmail.com> | 2006-11-26 04:52:36 +0000 |
| commit | 25e9c7efa597b8a4bfdbd68283adb59e86ffad89 (patch) | |
| tree | ff3a562b4c2530b61faaca980fbf97f73ef3bd45 /libavcodec | |
| parent | 167de74f103aee6cd41c3d87a53d15e3614910e3 (diff) | |
Use halfpq in coefficient scaling
Originally committed as revision 7168 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/vc1.c | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/libavcodec/vc1.c b/libavcodec/vc1.c index 94a1f112ea..1d991df16c 100644 --- a/libavcodec/vc1.c +++ b/libavcodec/vc1.c @@ -2843,8 +2843,8 @@ static int vc1_decode_i_block_adv(VC1Context *v, DCTELEM block[64], int n, int c if(use_pred) { /* scale predictors if needed*/ if(q2 && q1!=q2) { - q1 = q1 * 2 - 1; - q2 = q2 * 2 - 1; + q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1; + q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1; if(dc_pred_dir) { //left for(k = 1; k < 8; k++) @@ -2886,8 +2886,8 @@ static int vc1_decode_i_block_adv(VC1Context *v, DCTELEM block[64], int n, int c if(use_pred) { memcpy(ac_val2, ac_val, 8 * 2); if(q2 && q1!=q2) { - q1 = q1 * 2 - 1; - q2 = q2 * 2 - 1; + q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1; + q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1; for(k = 1; k < 8; k++) ac_val2[k] = (ac_val2[k] * q2 * vc1_dqscale[q1 - 1] + 0x20000) >> 18; } @@ -2896,8 +2896,8 @@ static int vc1_decode_i_block_adv(VC1Context *v, DCTELEM block[64], int n, int c if(use_pred) { memcpy(ac_val2 + 8, ac_val + 8, 8 * 2); if(q2 && q1!=q2) { - q1 = q1 * 2 - 1; - q2 = q2 * 2 - 1; + q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1; + q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1; for(k = 1; k < 8; k++) ac_val2[k + 8] = (ac_val2[k + 8] * q2 * vc1_dqscale[q1 - 1] + 0x20000) >> 18; } @@ -3042,8 +3042,8 @@ static int vc1_decode_intra_block(VC1Context *v, DCTELEM block[64], int n, int c if(use_pred) { /* scale predictors if needed*/ if(q2 && q1!=q2) { - q1 = q1 * 2 - 1; - q2 = q2 * 2 - 1; + q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1; + q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1; if(dc_pred_dir) { //left for(k = 1; k < 8; k++) @@ -3085,8 +3085,8 @@ static int vc1_decode_intra_block(VC1Context *v, DCTELEM block[64], int n, int c if(use_pred) { memcpy(ac_val2, ac_val, 8 * 2); if(q2 && q1!=q2) { - q1 = q1 * 2 - 1; - q2 = q2 * 2 - 1; + q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1; + q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1; for(k = 1; k < 8; k++) ac_val2[k] = (ac_val2[k] * q2 * vc1_dqscale[q1 - 1] + 0x20000) >> 18; } @@ -3095,8 +3095,8 @@ static int vc1_decode_intra_block(VC1Context *v, DCTELEM block[64], int n, int c if(use_pred) { memcpy(ac_val2 + 8, ac_val + 8, 8 * 2); if(q2 && q1!=q2) { - q1 = q1 * 2 - 1; - q2 = q2 * 2 - 1; + q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1; + q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1; for(k = 1; k < 8; k++) ac_val2[k + 8] = (ac_val2[k + 8] * q2 * vc1_dqscale[q1 - 1] + 0x20000) >> 18; } |