From b2e56e08c90a89c5566a1a391fec7c3136d49e3c Mon Sep 17 00:00:00 2001
From: Janne Grunau <janne-libav@jannau.net>
Date: Sun, 23 Oct 2011 00:31:16 +0200
Subject: [PATCH] resample: reject unhandled conversions

audio_resample can not reduce the number of channels
---
 libavcodec/resample.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/libavcodec/resample.c b/libavcodec/resample.c
index fce6272e78..ba8ce8910c 100644
--- a/libavcodec/resample.c
+++ b/libavcodec/resample.c
@@ -162,9 +162,10 @@ ReSampleContext *av_audio_resample_init(int output_channels, int input_channels,
                MAX_CHANNELS);
         return NULL;
     }
-    if (output_channels > 2 &&
-        !(output_channels == 6 && input_channels == 2) &&
-        output_channels != input_channels) {
+    if (output_channels != input_channels &&
+        (input_channels  > 2 ||
+         output_channels > 2 &&
+         !(output_channels == 6 && input_channels == 2))) {
         av_log(NULL, AV_LOG_ERROR,
                "Resampling output channel count must be 1 or 2 for mono input; 1, 2 or 6 for stereo input; or N for N channel input.\n");
         return NULL;