From 4ba90392bca096104d86d858a0dc87956bfe0794 Mon Sep 17 00:00:00 2001
From: Carl Eugen Hoyos <cehoyos@ag.or.at>
Date: Sun, 1 Dec 2013 12:02:21 +0100
Subject: [PATCH] Support AC-3 in Sega Dreamcast Sofdec files.

Fixes ticket #3184
---
 libavformat/mpeg.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/libavformat/mpeg.c b/libavformat/mpeg.c
index 1ea58d5ed5..90434a1437 100644
--- a/libavformat/mpeg.c
+++ b/libavformat/mpeg.c
@@ -521,7 +521,13 @@ static int mpegps_read_packet(AVFormatContext *s,
         codec_id = AV_CODEC_ID_DVD_NAV;
     } else if (startcode >= 0x1c0 && startcode <= 0x1df) {
         type = AVMEDIA_TYPE_AUDIO;
-        codec_id = m->sofdec > 0 ? AV_CODEC_ID_ADPCM_ADX : AV_CODEC_ID_MP2;
+        if (m->sofdec > 0) {
+            codec_id = AV_CODEC_ID_ADPCM_ADX;
+            // Auto-detect AC-3
+            request_probe = 50;
+        } else {
+            codec_id = AV_CODEC_ID_MP2;
+        }
     } else if (startcode >= 0x80 && startcode <= 0x87) {
         type = AVMEDIA_TYPE_AUDIO;
         codec_id = AV_CODEC_ID_AC3;