commit 389cfdbb9a92a438a0d7710321c2964c7ad55eca
author Andy Hung <hunga@google.com> Thu Aug 07 17:49:53 2014 -0700
committer Andy Hung <hunga@google.com> Fri Aug 08 09:59:02 2014 -0700
tree 7ef80332e73a04ccc3221bb0f75dc1a7932234ac
parent 92ce4715315bddd158c7d4028556632f0547e3b9

Fix effect and mono sink handling.

Do not permit mixing to mono sink in AudioFlinger.
Allow effects on mono sink if not Mixer thread (e.g. Record).

Bug: 16863095
Change-Id: I8b232fc1fb3f07bf017020c5d4f9ace644dec6d8

services/audioflinger/AudioFlinger.h

diff --git a/services/audioflinger/AudioFlinger.h b/services/audioflinger/AudioFlinger.h
index 31c5a1a..83e4ae1 100644
--- a/services/audioflinger/AudioFlinger.h
+++ b/services/audioflinger/AudioFlinger.h
@@ -340,7 +340,8 @@
             uint32_t channelCount = FCC_2; // stereo is default
             if (kEnableExtendedChannels) {
                 channelCount = audio_channel_count_from_out_mask(channelMask);
-                if (channelCount > AudioMixer::MAX_NUM_CHANNELS) {
+                if (channelCount < FCC_2 // mono is not supported at this time
+                        || channelCount > AudioMixer::MAX_NUM_CHANNELS) {
                     return false;
                 }
             }