dxva2_vc1: set PQUANT as described by the 2010 spec update

[ffmpeg] / libavformat / ipmovie.c

diff --git a/libavformat/ipmovie.c b/libavformat/ipmovie.c
index 57664f153954dc1ff7eb3178391d574583012b4d..4a766ef3bac6a5d51851bea3f1e4ace66b5eba5b 100644 (file)
--- a/libavformat/ipmovie.c
+++ b/libavformat/ipmovie.c
@@ -339,7 +339,7 @@ static int process_ipmovie_chunk(IPMVEContext *s, AVIOContext *pb,
 
         case OPCODE_INIT_AUDIO_BUFFERS:
             av_dlog(NULL, "initialize audio buffers\n");
-            if ((opcode_version > 1) || (opcode_size > 10)) {
+            if (opcode_version > 1 || opcode_size > 10 || opcode_size < 6) {
                 av_dlog(NULL, "bad init_audio_buffers opcode\n");
                 chunk_type = CHUNK_BAD;
                 break;
@@ -451,8 +451,8 @@ static int process_ipmovie_chunk(IPMVEContext *s, AVIOContext *pb,
             av_dlog(NULL, "set palette\n");
             /* check for the logical maximum palette size
              * (3 * 256 + 4 bytes) */
-            if (opcode_size > 0x304) {
-                av_dlog(NULL, "demux_ipmovie: set_palette opcode too large\n");
+            if (opcode_size > 0x304 || opcode_size < 4) {
+                av_dlog(NULL, "demux_ipmovie: set_palette opcode with invalid size\n");
                 chunk_type = CHUNK_BAD;
                 break;
             }
@@ -465,7 +465,8 @@ static int process_ipmovie_chunk(IPMVEContext *s, AVIOContext *pb,
             first_color = AV_RL16(&scratch[0]);
             last_color = first_color + AV_RL16(&scratch[2]) - 1;
             /* sanity check (since they are 16 bit values) */
-            if ((first_color > 0xFF) || (last_color > 0xFF)) {
+            if (   (first_color > 0xFF) || (last_color > 0xFF)
+                || (last_color - first_color + 1)*3 + 4 > opcode_size) {
                 av_dlog(NULL, "demux_ipmovie: set_palette indexes out of range (%d -> %d)\n",
                     first_color, last_color);
                 chunk_type = CHUNK_BAD;