diff options
Diffstat (limited to 'vp8/decoder')
| -rw-r--r-- | vp8/decoder/decodframe.c | 54 |
1 files changed, 20 insertions, 34 deletions
diff --git a/vp8/decoder/decodframe.c b/vp8/decoder/decodframe.c index 94f5d13ea..a46b0de34 100644 --- a/vp8/decoder/decodframe.c +++ b/vp8/decoder/decodframe.c @@ -1158,9 +1158,27 @@ int vp8_decode_frame(VP8D_COMP *pbi) { xd->update_mb_segmentation_map = (unsigned char)vp8_read_bit(bc); // If so what method will be used. - if (xd->update_mb_segmentation_map) - pc->temporal_update = (unsigned char)vp8_read_bit(bc); + if (xd->update_mb_segmentation_map) { + // Which macro block level features are enabled + + // Read the probs used to decode the segment id for each macro + // block. + for (i = 0; i < MB_FEATURE_TREE_PROBS; i++) { + xd->mb_segment_tree_probs[i] = vp8_read_bit(bc) ? + (vp8_prob)vp8_read_literal(bc, 8) : 255; + } + // Read the prediction probs needed to decode the segment id + pc->temporal_update = (unsigned char)vp8_read_bit(bc); + for (i = 0; i < PREDICTION_PROBS; i++) { + if (pc->temporal_update) { + pc->segment_pred_probs[i] = vp8_read_bit(bc) ? + (vp8_prob)vp8_read_literal(bc, 8) : 255; + } else { + pc->segment_pred_probs[i] = 255; + } + } + } // Is the segment data being updated xd->update_mb_segmentation_data = (unsigned char)vp8_read_bit(bc); @@ -1225,38 +1243,6 @@ int vp8_decode_frame(VP8D_COMP *pbi) { } } } - - if (xd->update_mb_segmentation_map) { - // Which macro block level features are enabled - vpx_memset(xd->mb_segment_tree_probs, 255, - sizeof(xd->mb_segment_tree_probs)); - vpx_memset(pc->segment_pred_probs, 255, - sizeof(pc->segment_pred_probs)); - - // Read the probs used to decode the segment id for each macro - // block. - for (i = 0; i < MB_FEATURE_TREE_PROBS; i++) { - // If not explicitly set value is defaulted to 255 by - // memset above - if (vp8_read_bit(bc)) - xd->mb_segment_tree_probs[i] = - (vp8_prob)vp8_read_literal(bc, 8); - } - - // If predictive coding of segment map is enabled read the - // prediction probabilities. - if (pc->temporal_update) { - // Read the prediction probs needed to decode the segment id - // when predictive coding enabled - for (i = 0; i < PREDICTION_PROBS; i++) { - // If not explicitly set value is defaulted to 255 by - // memset above - if (vp8_read_bit(bc)) - pc->segment_pred_probs[i] = - (vp8_prob)vp8_read_literal(bc, 8); - } - } - } } // Read common prediction model status flag probability updates for the |