Merge commit '2c1d84499bfe06d75e9160b824eeffd9f5587337' into release/0.10

* commit '2c1d84499bfe06d75e9160b824eeffd9f5587337':
  lagarith: pad RGB buffer by 1 byte.
  truemotion1: check the header size
  shorten: pad the internal bitstream buffer
  samplefmt: avoid integer overflow in av_samples_get_buffer_size()
  h264: Fix a typo from the previous commit
  h264: Lower bound check for slice offsets
  rpza: limit the number of blocks to the total remaining blocks in the frame

Conflicts:
	libavcodec/lagarith.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 20 insertions, 17 deletions

diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index 9a0b07f0b0..877b0a3a7b 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -3231,8 +3231,8 @@ static int decode_slice_header(H264Context *h, H264Context *h0){
     }
 
     h->deblocking_filter = 1;
-    h->slice_alpha_c0_offset = 52;
-    h->slice_beta_offset = 52;
+    h->slice_alpha_c0_offset = 0;
+    h->slice_beta_offset = 0;
     if( h->pps.deblocking_filter_parameters_present ) {
         tmp= get_ue_golomb_31(&s->gb);
         if(tmp > 2){
@@ -3243,12 +3243,16 @@ static int decode_slice_header(H264Context *h, H264Context *h0){
         if(h->deblocking_filter < 2)
             h->deblocking_filter^= 1; // 1<->0
 
-        if( h->deblocking_filter ) {
-            h->slice_alpha_c0_offset += get_se_golomb(&s->gb) << 1;
-            h->slice_beta_offset     += get_se_golomb(&s->gb) << 1;
-            if(   h->slice_alpha_c0_offset > 104U
-               || h->slice_beta_offset     > 104U){
-                av_log(s->avctx, AV_LOG_ERROR, "deblocking filter parameters %d %d out of range\n", h->slice_alpha_c0_offset, h->slice_beta_offset);
+        if (h->deblocking_filter) {
+            h->slice_alpha_c0_offset = get_se_golomb(&s->gb) * 2;
+            h->slice_beta_offset     = get_se_golomb(&s->gb) * 2;
+            if (h->slice_alpha_c0_offset >  12 ||
+                h->slice_alpha_c0_offset < -12 ||
+                h->slice_beta_offset >  12     ||
+                h->slice_beta_offset < -12) {
+                av_log(s->avctx, AV_LOG_ERROR,
+                       "deblocking filter parameters %d %d out of range\n",
+                       h->slice_alpha_c0_offset, h->slice_beta_offset);
                 return -1;
             }
         }
@@ -3277,14 +3281,12 @@ static int decode_slice_header(H264Context *h, H264Context *h0){
             }
         }
     }
-    h->qp_thresh = 15 + 52 - FFMIN(h->slice_alpha_c0_offset, h->slice_beta_offset)
-                 - FFMAX3(0, h->pps.chroma_qp_index_offset[0], h->pps.chroma_qp_index_offset[1])
-                 + 6 * (h->sps.bit_depth_luma - 8);
-
-#if 0 //FMO
-    if( h->pps.num_slice_groups > 1  && h->pps.mb_slice_group_map_type >= 3 && h->pps.mb_slice_group_map_type <= 5)
-        slice_group_change_cycle= get_bits(&s->gb, ?);
-#endif
+    h->qp_thresh = 15 -
+                   FFMIN(h->slice_alpha_c0_offset, h->slice_beta_offset) -
+                   FFMAX3(0,
+                          h->pps.chroma_qp_index_offset[0],
+                          h->pps.chroma_qp_index_offset[1]) +
+                   6 * (h->sps.bit_depth_luma - 8);
 
     h0->last_slice_type = slice_type;
     h->slice_num = ++h0->current_slice;
@@ -3345,7 +3347,8 @@ static int decode_slice_header(H264Context *h, H264Context *h0){
                s->current_picture_ptr->field_poc[0], s->current_picture_ptr->field_poc[1],
                h->ref_count[0], h->ref_count[1],
                s->qscale,
-               h->deblocking_filter, h->slice_alpha_c0_offset/2-26, h->slice_beta_offset/2-26,
+               h->deblocking_filter,
+               h->slice_alpha_c0_offset, h->slice_beta_offset,
                h->use_weight,
                h->use_weight==1 && h->use_weight_chroma ? "c" : "",
                h->slice_type == AV_PICTURE_TYPE_B ? (h->direct_spatial_mv_pred ? "SPAT" : "TEMP") : ""