smackerdemuxer: check some values before instead of just after malloc()

[ffmpeg] / libavformat / ac3dec.c

diff --git a/libavformat/ac3dec.c b/libavformat/ac3dec.c
index fcf99363ee65efee328723c5897d9e59f1458f83..f1421dc05886b317e6cf8656009e648388f6f87f 100644 (file)
--- a/libavformat/ac3dec.c
+++ b/libavformat/ac3dec.c
@@ -40,8 +40,10 @@ static int ac3_eac3_probe(AVProbeData *p, enum CodecID expected_codec_id)
         buf2 = buf;
 
         for(frames = 0; buf2 < end; frames++) {
+            if(!memcmp(buf2, "\x1\x10\0\0\0\0\0\0", 8))
+                buf2+=16;
             init_get_bits(&gbc, buf2, 54);
-            if(ff_ac3_parse_header(&gbc, &hdr) < 0)
+            if(avpriv_ac3_parse_header(&gbc, &hdr) < 0)
                 break;
             if(buf2 + hdr.frame_size > end ||
                av_crc(av_crc_get_table(AV_CRC_16_ANSI), 0, buf2 + 2, hdr.frame_size - 2))
@@ -58,7 +60,7 @@ static int ac3_eac3_probe(AVProbeData *p, enum CodecID expected_codec_id)
     // keep this in sync with mp3 probe, both need to avoid
     // issues with MPEG-files!
     if   (first_frames>=4) return AVPROBE_SCORE_MAX/2+1;
-    else if(max_frames>500)return AVPROBE_SCORE_MAX/2;
+    else if(max_frames>200)return AVPROBE_SCORE_MAX/2;
     else if(max_frames>=4) return AVPROBE_SCORE_MAX/4;
     else if(max_frames>=1) return 1;
     else                   return 0;
@@ -71,12 +73,11 @@ static int ac3_probe(AVProbeData *p)
 }
 
 AVInputFormat ff_ac3_demuxer = {
-    "ac3",
-    NULL_IF_CONFIG_SMALL("raw AC-3"),
-    0,
-    ac3_probe,
-    ff_raw_audio_read_header,
-    ff_raw_read_partial_packet,
+    .name           = "ac3",
+    .long_name      = NULL_IF_CONFIG_SMALL("raw AC-3"),
+    .read_probe     = ac3_probe,
+    .read_header    = ff_raw_audio_read_header,
+    .read_packet    = ff_raw_read_partial_packet,
     .flags= AVFMT_GENERIC_INDEX,
     .extensions = "ac3",
     .value = CODEC_ID_AC3,
@@ -90,12 +91,11 @@ static int eac3_probe(AVProbeData *p)
 }
 
 AVInputFormat ff_eac3_demuxer = {
-    "eac3",
-    NULL_IF_CONFIG_SMALL("raw E-AC-3"),
-    0,
-    eac3_probe,
-    ff_raw_audio_read_header,
-    ff_raw_read_partial_packet,
+    .name           = "eac3",
+    .long_name      = NULL_IF_CONFIG_SMALL("raw E-AC-3"),
+    .read_probe     = eac3_probe,
+    .read_header    = ff_raw_audio_read_header,
+    .read_packet    = ff_raw_read_partial_packet,
     .flags= AVFMT_GENERIC_INDEX,
     .extensions = "eac3",
     .value = CODEC_ID_EAC3,