From 439e4ed408c21bd65711d279bd5251cef7e83440 Mon Sep 17 00:00:00 2001 From: Ravi Kumar Alamanda Date: Fri, 3 Apr 2015 12:13:21 -0700 Subject: audiopolicy: use deep buffer output by default for music streams Default disabled. This is enabled by adb shell setprop audio.deep_buffer.media 1 Applications that use AudioTrack java interface for audio rendering defaults to primary output as flags indicated as FLAG_NONE. If the primary output is low latency output, it results higher power consumption than deep-buffer path if used. Make the deep buffer output as default option for music streams if flags are not specified. It may also be used for testing audio glitches from heavy CPU or DRM which may cause issues with the FastMixer. Bug: 21198655 Bug: 21785618 Change-Id: I909c296ddcf4484b9a877ef1c0230ea58537e06a --- services/audiopolicy/managerdefault/AudioPolicyManager.cpp | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'services/audiopolicy') diff --git a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp index 0adaac9..6befb8d 100644 --- a/services/audiopolicy/managerdefault/AudioPolicyManager.cpp +++ b/services/audiopolicy/managerdefault/AudioPolicyManager.cpp @@ -789,6 +789,11 @@ audio_io_handle_t AudioPolicyManager::getOutputForDevice( // only allow deep buffering for music stream type if (stream != AUDIO_STREAM_MUSIC) { flags = (audio_output_flags_t)(flags &~AUDIO_OUTPUT_FLAG_DEEP_BUFFER); + } else if (/* stream == AUDIO_STREAM_MUSIC && */ + flags == AUDIO_OUTPUT_FLAG_NONE && + property_get_bool("audio.deep_buffer.media", false /* default_value */)) { + // use DEEP_BUFFER as default output for music stream type + flags = (audio_output_flags_t)AUDIO_OUTPUT_FLAG_DEEP_BUFFER; } if (stream == AUDIO_STREAM_TTS) { flags = AUDIO_OUTPUT_FLAG_TTS; -- cgit v1.1