e7155e6bde
The problem is that when the A2DP headset is disconnected, there is a transition period during which the A2DP sink pumps data at a very high pace. This makes that: 1 the audio flinger mixer thread spins and starves binder threads thus delaying the completion of the A2DP output stream shutdown 2 we read the audio http audio stream faster than normal and we reach the end of stream for audio while video is still playing if the streamed file is small enough. The fix consists in detecting abnormal short write intervals and sleep to restore a normal write pace. Change-Id: Iab127882494ab0e26266371dc0ce5c2ff6fa476e
139 lines
5.0 KiB
C++
139 lines
5.0 KiB
C++
/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef A2DP_AUDIO_HARDWARE_H
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#define A2DP_AUDIO_HARDWARE_H
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#include <stdint.h>
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#include <sys/types.h>
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#include <utils/threads.h>
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#include <hardware_legacy/AudioHardwareBase.h>
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namespace android {
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class A2dpAudioInterface : public AudioHardwareBase
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{
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class A2dpAudioStreamOut;
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public:
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A2dpAudioInterface(AudioHardwareInterface* hw);
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virtual ~A2dpAudioInterface();
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virtual status_t initCheck();
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virtual status_t setVoiceVolume(float volume);
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virtual status_t setMasterVolume(float volume);
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virtual status_t setMode(int mode);
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// mic mute
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virtual status_t setMicMute(bool state);
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virtual status_t getMicMute(bool* state);
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virtual status_t setParameters(const String8& keyValuePairs);
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virtual String8 getParameters(const String8& keys);
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virtual size_t getInputBufferSize(uint32_t sampleRate, int format, int channelCount);
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// create I/O streams
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virtual AudioStreamOut* openOutputStream(
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uint32_t devices,
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int *format=0,
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uint32_t *channels=0,
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uint32_t *sampleRate=0,
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status_t *status=0);
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virtual void closeOutputStream(AudioStreamOut* out);
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virtual AudioStreamIn* openInputStream(
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uint32_t devices,
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int *format,
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uint32_t *channels,
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uint32_t *sampleRate,
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status_t *status,
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AudioSystem::audio_in_acoustics acoustics);
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virtual void closeInputStream(AudioStreamIn* in);
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// static AudioHardwareInterface* createA2dpInterface();
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protected:
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virtual status_t dump(int fd, const Vector<String16>& args);
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private:
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class A2dpAudioStreamOut : public AudioStreamOut {
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public:
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A2dpAudioStreamOut();
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virtual ~A2dpAudioStreamOut();
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status_t set(uint32_t device,
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int *pFormat,
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uint32_t *pChannels,
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uint32_t *pRate);
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virtual uint32_t sampleRate() const { return 44100; }
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// SBC codec wants a multiple of 512
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virtual size_t bufferSize() const { return 512 * 20; }
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virtual uint32_t channels() const { return AudioSystem::CHANNEL_OUT_STEREO; }
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virtual int format() const { return AudioSystem::PCM_16_BIT; }
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virtual uint32_t latency() const { return ((1000*bufferSize())/frameSize())/sampleRate() + 200; }
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virtual status_t setVolume(float left, float right) { return INVALID_OPERATION; }
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virtual ssize_t write(const void* buffer, size_t bytes);
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status_t standby();
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virtual status_t dump(int fd, const Vector<String16>& args);
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virtual status_t setParameters(const String8& keyValuePairs);
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virtual String8 getParameters(const String8& keys);
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virtual status_t getRenderPosition(uint32_t *dspFrames);
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private:
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friend class A2dpAudioInterface;
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status_t init();
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status_t close();
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status_t close_l();
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status_t setAddress(const char* address);
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status_t setBluetoothEnabled(bool enabled);
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status_t setSuspended(bool onOff);
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status_t standby_l();
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private:
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int mFd;
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bool mStandby;
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int mStartCount;
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int mRetryCount;
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char mA2dpAddress[20];
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void* mData;
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Mutex mLock;
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bool mBluetoothEnabled;
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uint32_t mDevice;
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bool mClosing;
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bool mSuspended;
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nsecs_t mLastWriteTime;
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uint32_t mBufferDurationUs;
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};
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friend class A2dpAudioStreamOut;
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A2dpAudioStreamOut* mOutput;
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AudioHardwareInterface *mHardwareInterface;
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char mA2dpAddress[20];
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bool mBluetoothEnabled;
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bool mSuspended;
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};
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// ----------------------------------------------------------------------------
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}; // namespace android
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#endif // A2DP_AUDIO_HARDWARE_H
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