check all svq3_get_ue_golomb() returns.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 979bea13003ef489d95d2538ac2fb1c26c6f103b)

4 files changed, 20 insertions, 17 deletions

diff --git a/libavcodec/dirac.c b/libavcodec/dirac.c
index af0d799acc..1582a5f8f2 100644
--- a/libavcodec/dirac.c
+++ b/libavcodec/dirac.c
@@ -120,7 +120,7 @@ static int parse_source_parameters(AVCodecContext *avctx, GetBitContext *gb,
     // chroma subsampling
     if (get_bits1(gb))
         source->chroma_format = svq3_get_ue_golomb(gb);
-    if (source->chroma_format > 2) {
+    if (source->chroma_format > 2U) {
         av_log(avctx, AV_LOG_ERROR, "Unknown chroma format %d\n",
                source->chroma_format);
         return -1;
@@ -128,14 +128,14 @@ static int parse_source_parameters(AVCodecContext *avctx, GetBitContext *gb,
 
     if (get_bits1(gb))
         source->interlaced = svq3_get_ue_golomb(gb);
-    if (source->interlaced > 1)
+    if (source->interlaced > 1U)
         return -1;
 
     // frame rate
     if (get_bits1(gb)) {
         source->frame_rate_index = svq3_get_ue_golomb(gb);
 
-        if (source->frame_rate_index > 10)
+        if (source->frame_rate_index > 10U)
             return -1;
 
         if (!source->frame_rate_index) {
@@ -156,7 +156,7 @@ static int parse_source_parameters(AVCodecContext *avctx, GetBitContext *gb,
     if (get_bits1(gb)) {
         source->aspect_ratio_index = svq3_get_ue_golomb(gb);
 
-        if (source->aspect_ratio_index > 6)
+        if (source->aspect_ratio_index > 6U)
             return -1;
 
         if (!source->aspect_ratio_index) {
@@ -179,7 +179,7 @@ static int parse_source_parameters(AVCodecContext *avctx, GetBitContext *gb,
     if (get_bits1(gb)) {
         source->pixel_range_index = svq3_get_ue_golomb(gb);
 
-        if (source->pixel_range_index > 4)
+        if (source->pixel_range_index > 4U)
             return -1;
 
         // This assumes either fullrange or MPEG levels only
@@ -207,7 +207,7 @@ static int parse_source_parameters(AVCodecContext *avctx, GetBitContext *gb,
     if (get_bits1(gb)) {
         idx = source->color_spec_index = svq3_get_ue_golomb(gb);
 
-        if (source->color_spec_index > 4)
+        if (source->color_spec_index > 4U)
             return -1;
 
         avctx->color_primaries = dirac_color_presets[idx].color_primaries;
@@ -217,7 +217,7 @@ static int parse_source_parameters(AVCodecContext *avctx, GetBitContext *gb,
         if (!source->color_spec_index) {
             if (get_bits1(gb)) {
                 idx = svq3_get_ue_golomb(gb);
-                if (idx < 3)
+                if (idx < 3U)
                     avctx->color_primaries = dirac_primaries[idx];
             }
 
@@ -259,7 +259,7 @@ int ff_dirac_parse_sequence_header(AVCodecContext *avctx, GetBitContext *gb,
     else if (version_major > 2)
         av_log(avctx, AV_LOG_WARNING, "Stream may have unhandled features\n");
 
-    if (video_format > 20)
+    if (video_format > 20U)
         return -1;
 
     // Fill in defaults for the source parameters.
diff --git a/libavcodec/rv30.c b/libavcodec/rv30.c
index 53d824a109..935866da9a 100644
--- a/libavcodec/rv30.c
+++ b/libavcodec/rv30.c
@@ -79,7 +79,7 @@ static int rv30_decode_intra_types(RV34DecContext *r, GetBitContext *gb, int8_t
     for(i = 0; i < 4; i++, dst += r->intra_types_stride - 4){
         for(j = 0; j < 4; j+= 2){
             int code = svq3_get_ue_golomb(gb) << 1;
-            if(code >= 81*2){
+            if(code >= 81U*2U){
                 av_log(r->s.avctx, AV_LOG_ERROR, "Incorrect intra prediction code\n");
                 return -1;
             }
@@ -108,7 +108,7 @@ static int rv30_decode_mb_info(RV34DecContext *r)
     GetBitContext *gb = &s->gb;
     int code = svq3_get_ue_golomb(gb);
 
-    if(code > 11){
+    if(code > 11U){
         av_log(s->avctx, AV_LOG_ERROR, "Incorrect MB type code\n");
         return -1;
     }
diff --git a/libavcodec/rv40.c b/libavcodec/rv40.c
index 54d786a3a6..842f01af02 100644
--- a/libavcodec/rv40.c
+++ b/libavcodec/rv40.c
@@ -231,8 +231,11 @@ static int rv40_decode_mb_info(RV34DecContext *r)
     int blocks[RV34_MB_TYPES] = {0};
     int count = 0;
 
-    if(!r->s.mb_skip_run)
+    if(!r->s.mb_skip_run) {
         r->s.mb_skip_run = svq3_get_ue_golomb(gb) + 1;
+        if(r->s.mb_skip_run > (unsigned)s->mb_num)
+            return -1;
+    }
 
     if(--r->s.mb_skip_run)
          return RV34_MB_SKIP;
diff --git a/libavcodec/svq3.c b/libavcodec/svq3.c
index 30cd0f102f..e5c18c59c2 100644
--- a/libavcodec/svq3.c
+++ b/libavcodec/svq3.c
@@ -221,7 +221,7 @@ static inline int svq3_decode_block(GetBitContext *gb, DCTELEM *block,
     for (limit = (16 >> intra); index < 16; index = limit, limit += 8) {
         for (; (vlc = svq3_get_ue_golomb(gb)) != 0; index++) {
 
-          if (vlc == INVALID_VLC)
+          if (vlc < 0)
               return -1;
 
           sign = (vlc & 0x1) - 1;
@@ -239,7 +239,7 @@ static inline int svq3_decode_block(GetBitContext *gb, DCTELEM *block,
                   level = ((vlc + 9) >> 2) - run;
               }
           } else {
-              if (vlc < 16) {
+              if (vlc < 16U) {
                   run   = svq3_dct_tables[intra][vlc].run;
                   level = svq3_dct_tables[intra][vlc].level;
               } else if (intra) {
@@ -569,7 +569,7 @@ static int svq3_decode_mb(SVQ3Context *svq3, unsigned int mb_type)
             for (i = 0; i < 16; i+=2) {
                 vlc = svq3_get_ue_golomb(&s->gb);
 
-                if (vlc >= 25){
+                if (vlc >= 25U){
                     av_log(h->s.avctx, AV_LOG_ERROR, "luma prediction:%d\n", vlc);
                     return -1;
                 }
@@ -641,7 +641,7 @@ static int svq3_decode_mb(SVQ3Context *svq3, unsigned int mb_type)
     }
 
     if (!IS_INTRA16x16(mb_type) && (!IS_SKIP(mb_type) || s->pict_type == AV_PICTURE_TYPE_B)) {
-        if ((vlc = svq3_get_ue_golomb(&s->gb)) >= 48){
+        if ((vlc = svq3_get_ue_golomb(&s->gb)) >= 48U){
             av_log(h->s.avctx, AV_LOG_ERROR, "cbp_vlc=%d\n", vlc);
             return -1;
         }
@@ -651,7 +651,7 @@ static int svq3_decode_mb(SVQ3Context *svq3, unsigned int mb_type)
     if (IS_INTRA16x16(mb_type) || (s->pict_type != AV_PICTURE_TYPE_I && s->adaptive_quant && cbp)) {
         s->qscale += svq3_get_se_golomb(&s->gb);
 
-        if (s->qscale > 31){
+        if (s->qscale > 31U){
             av_log(h->s.avctx, AV_LOG_ERROR, "qscale:%d\n", s->qscale);
             return -1;
         }
@@ -755,7 +755,7 @@ static int svq3_decode_slice_header(AVCodecContext *avctx)
         skip_bits_long(&s->gb, 0);
     }
 
-    if ((i = svq3_get_ue_golomb(&s->gb)) == INVALID_VLC || i >= 3){
+    if ((i = svq3_get_ue_golomb(&s->gb)) >= 3U){
         av_log(h->s.avctx, AV_LOG_ERROR, "illegal slice type %d \n", i);
         return -1;
     }