commit 6f7e097ee5a495b224dc64edc64e8fc36eb9ee44
author Eric Laurent <elaurent@google.com> Mon Aug 10 08:15:12 2009 -0700
committer Eric Laurent <elaurent@google.com> Mon Aug 10 08:15:12 2009 -0700
tree ef14a7e3142edbc5765d37d90df2b1d73c49b628
parent 36093d4e5f6a77902fb9498453537ef6ef73e025

Limit AudioFlinger mixer track sampling rate.

When changing the audio output stream sampling rate with setParameters() make sure that all tracks have a sampling rate less or equal to 2 times the new output sampling rate.

libs/audioflinger/AudioFlinger.cpp

diff --git a/libs/audioflinger/AudioFlinger.cpp b/libs/audioflinger/AudioFlinger.cpp
index d019097..2e947d6 100644
--- a/libs/audioflinger/AudioFlinger.cpp
+++ b/libs/audioflinger/AudioFlinger.cpp
@@ -1512,6 +1512,10 @@
                     int name = getTrackName_l();
                     if (name < 0) break;
                     mTracks[i]->mName = name;
+                    // limit track sample rate to 2 x new output sample rate
+                    if (mTracks[i]->mCblk->sampleRate > 2 * sampleRate()) {
+                        mTracks[i]->mCblk->sampleRate = 2 * sampleRate();
+                    }
                 }
                 sendConfigEvent_l(AudioSystem::OUTPUT_CONFIG_CHANGED);
             }