Merge remote-tracking branch 'qatar/master'

* qatar/master:
  indeo4: Check the inherited quant_mat

Conflicts:
	libavcodec/indeo4.c

See: 884efd4eMerged-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/indeo4.c

@@ -284,7 +284,6 @@ static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band,
 {
     int plane, band_num, indx, transform_id, scan_indx;
     int i;
-    int quant_mat;
 
     plane    = get_bits(&ctx->gb, 2);
     band_num = get_bits(&ctx->gb, 4);
@@ -383,17 +382,18 @@ static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band,
             band->scan = scan_index_to_tab[scan_indx];
             band->scan_size = band->blk_size;
 
-            quant_mat = get_bits(&ctx->gb, 5);
-            if (quant_mat == 31) {
-                av_log(avctx, AV_LOG_ERROR, "Custom quant matrix encountered!\n");
-                return AVERROR_INVALIDDATA;
-            }
-            if (quant_mat >= FF_ARRAY_ELEMS(quant_index_to_tab)) {
-                avpriv_request_sample(avctx, "Quantization matrix %d",
-                                      quant_mat);
+            band->quant_mat = get_bits(&ctx->gb, 5);
+            if (band->quant_mat >= FF_ARRAY_ELEMS(quant_index_to_tab)) {
+
+                if (band->quant_mat == 31)
+                    av_log(avctx, AV_LOG_ERROR,
+                           "Custom quant matrix encountered!\n");
+                else
+                    avpriv_request_sample(avctx, "Quantization matrix %d",
+                                          band->quant_mat);
+                band->quant_mat = -1;
                 return AVERROR_INVALIDDATA;
             }
-            band->quant_mat = quant_mat;
         } else {
             if (old_blk_size != band->blk_size) {
                 av_log(avctx, AV_LOG_ERROR,
@@ -401,6 +401,10 @@ static int decode_band_hdr(IVI45DecContext *ctx, IVIBandDesc *band,
                        "inherited\n");
                 return AVERROR_INVALIDDATA;
             }
+            if (band->quant_mat < 0) {
+                av_log(avctx, AV_LOG_ERROR, "Invalid quant_mat inherited\n");
+                return AVERROR_INVALIDDATA;
+            }
         }
         if (quant_index_to_tab[band->quant_mat] > 4 && band->blk_size == 4) {
             av_log(avctx, AV_LOG_ERROR, "Invalid quant matrix for 4x4 block encountered!\n");