From 97b5d0d5b5ef766eb5dd680d05a5d199662d4ae0 Mon Sep 17 00:00:00 2001 From: Glenn Kasten Date: Fri, 23 Mar 2012 18:54:19 -0700 Subject: Fast mixer Change-Id: I61552f83507e08e4c706076b9fb15362869e6265 --- services/audioflinger/FastMixer.h | 72 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 services/audioflinger/FastMixer.h (limited to 'services/audioflinger/FastMixer.h') diff --git a/services/audioflinger/FastMixer.h b/services/audioflinger/FastMixer.h new file mode 100644 index 0000000..b24f2eb --- /dev/null +++ b/services/audioflinger/FastMixer.h @@ -0,0 +1,72 @@ +/* + * Copyright (C) 2012 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef ANDROID_AUDIO_FAST_MIXER_H +#define ANDROID_AUDIO_FAST_MIXER_H + +#include +extern "C" { +#include "../private/bionic_futex.h" +} +#include "StateQueue.h" +#include "FastMixerState.h" + +namespace android { + +typedef StateQueue FastMixerStateQueue; + +class FastMixer : public Thread { + +public: + FastMixer() : Thread(false /*canCallJava*/) { } + virtual ~FastMixer() { } + + FastMixerStateQueue* sq() { return &mSQ; } + +private: + virtual bool threadLoop(); + FastMixerStateQueue mSQ; + +}; // class FastMixer + +// The FastMixerDumpState keeps a cache of FastMixer statistics that can be logged by dumpsys. +// Since used non-atomically, only POD types are permitted, and the contents can't be trusted. +// It has a different lifetime than the FastMixer, and so it can't be a member of FastMixer. +struct FastMixerDumpState { + FastMixerDumpState(); + /*virtual*/ ~FastMixerDumpState(); + + void dump(int fd); + + FastMixerState::Command mCommand; // current command + uint32_t mWriteSequence; // incremented before and after each write() + uint32_t mFramesWritten; // total number of frames written successfully + uint32_t mNumTracks; // total number of active fast tracks + uint32_t mWriteErrors; // total number of write() errors + uint32_t mUnderruns; // total number of underruns + uint32_t mOverruns; // total number of overruns +#ifdef FAST_MIXER_STATISTICS + // cycle times in seconds + float mMean; + float mMinimum; + float mMaximum; + float mStddev; +#endif +}; + +} // namespace android + +#endif // ANDROID_AUDIO_FAST_MIXER_H -- cgit v1.1