From 83d07313647bc2bf98030825a44532205ca84936 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?M=C3=A5ns=20Rullg=C3=A5rd?= <mans@mansr.com>
Date: Mon, 3 Jul 2006 21:40:01 +0000
Subject: [PATCH] attempt to detect Chinese AVS video

Originally committed as revision 5604 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavformat/mpeg.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/libavformat/mpeg.c b/libavformat/mpeg.c
index eca8bff511..e5f76bdc0d 100644
--- a/libavformat/mpeg.c
+++ b/libavformat/mpeg.c
@@ -1605,8 +1605,15 @@ static int mpegps_read_packet(AVFormatContext *s,
             goto skip;
         }
     } else if (startcode >= 0x1e0 && startcode <= 0x1ef) {
+        static const unsigned char avs_seqh[4] = { 0, 0, 1, 0xb0 };
+        unsigned char buf[8];
+        get_buffer(&s->pb, buf, 8);
+        url_fseek(&s->pb, -8, SEEK_CUR);
+        if(!memcmp(buf, avs_seqh, 4) && (buf[6] != 0 || buf[7] != 1))
+            codec_id = CODEC_ID_CAVS;
+        else
+            codec_id = CODEC_ID_MPEG2VIDEO;
         type = CODEC_TYPE_VIDEO;
-        codec_id = CODEC_ID_MPEG2VIDEO;
     } else if (startcode >= 0x1c0 && startcode <= 0x1df) {
         type = CODEC_TYPE_AUDIO;
         codec_id = CODEC_ID_MP2;