diff options
author | Glenn Kasten <gkasten@google.com> | 2012-10-30 10:36:00 -0700 |
---|---|---|
committer | Android (Google) Code Review <android-gerrit@google.com> | 2012-10-30 10:36:00 -0700 |
commit | 0eac0714e9fbd6e43b1fd13a38131800b2a81377 (patch) | |
tree | 7b9efe8dc4926a401c0dc64248096a54b97fe20c | |
parent | db3a20ea484514f7f23d4ef3c30fe4780ab940d2 (diff) | |
parent | 599fabc596687efa4b71b8f3ebbb957c7cae0c72 (diff) | |
download | frameworks_av-0eac0714e9fbd6e43b1fd13a38131800b2a81377.zip frameworks_av-0eac0714e9fbd6e43b1fd13a38131800b2a81377.tar.gz frameworks_av-0eac0714e9fbd6e43b1fd13a38131800b2a81377.tar.bz2 |
Merge "Document AudioMixer hard-coded limits"
-rw-r--r-- | services/audioflinger/AudioMixer.cpp | 6 | ||||
-rw-r--r-- | services/audioflinger/AudioMixer.h | 7 |
2 files changed, 13 insertions, 0 deletions
diff --git a/services/audioflinger/AudioMixer.cpp b/services/audioflinger/AudioMixer.cpp index e652d14..a4ed445 100644 --- a/services/audioflinger/AudioMixer.cpp +++ b/services/audioflinger/AudioMixer.cpp @@ -106,6 +106,12 @@ AudioMixer::AudioMixer(size_t frameCount, uint32_t sampleRate, uint32_t maxNumTr ALOG_ASSERT(maxNumTracks <= MAX_NUM_TRACKS, "maxNumTracks %u > MAX_NUM_TRACKS %u", maxNumTracks, MAX_NUM_TRACKS); + // AudioMixer is not yet capable of more than 32 active track inputs + ALOG_ASSERT(32 >= MAX_NUM_TRACKS, "bad MAX_NUM_TRACKS %d", MAX_NUM_TRACKS); + + // AudioMixer is not yet capable of multi-channel output beyond stereo + ALOG_ASSERT(2 == MAX_NUM_CHANNELS, "bad MAX_NUM_CHANNELS %d", MAX_NUM_CHANNELS); + LocalClock lc; pthread_once(&sOnceControl, &sInitRoutine); diff --git a/services/audioflinger/AudioMixer.h b/services/audioflinger/AudioMixer.h index dc468ff..e60a298 100644 --- a/services/audioflinger/AudioMixer.h +++ b/services/audioflinger/AudioMixer.h @@ -41,8 +41,15 @@ public: /*virtual*/ ~AudioMixer(); // non-virtual saves a v-table, restore if sub-classed + + // This mixer has a hard-coded upper limit of 32 active track inputs. + // Adding support for > 32 tracks would require more than simply changing this value. static const uint32_t MAX_NUM_TRACKS = 32; // maximum number of channels supported by the mixer + + // This mixer has a hard-coded upper limit of 2 channels for output. + // There is support for > 2 channel tracks down-mixed to 2 channel output via a down-mix effect. + // Adding support for > 2 channel output would require more than simply changing this value. static const uint32_t MAX_NUM_CHANNELS = 2; // maximum number of channels supported for the content static const uint32_t MAX_NUM_CHANNELS_TO_DOWNMIX = 8; |