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76 lines
3.1 KiB
76 lines
3.1 KiB
/*
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**
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** Copyright 2017, 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 INCLUDING_FROM_AUDIOFLINGER_H
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#error This header file should only be included from AudioFlinger.h
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#endif
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// playback track
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class MmapTrack : public TrackBase {
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public:
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MmapTrack(ThreadBase *thread,
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const audio_attributes_t& attr,
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uint32_t sampleRate,
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audio_format_t format,
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audio_channel_mask_t channelMask,
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audio_session_t sessionId,
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bool isOut,
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const android::content::AttributionSourceState& attributionSource,
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pid_t creatorPid,
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audio_port_handle_t portId = AUDIO_PORT_HANDLE_NONE);
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virtual ~MmapTrack();
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// TrackBase virtual
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virtual status_t initCheck() const;
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virtual status_t start(AudioSystem::sync_event_t event,
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audio_session_t triggerSession);
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virtual void stop();
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virtual bool isFastTrack() const { return false; }
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bool isDirect() const override { return true; }
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void appendDumpHeader(String8& result);
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void appendDump(String8& result, bool active);
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// protected by MMapThread::mLock
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void setSilenced_l(bool silenced) { mSilenced = silenced;
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mSilencedNotified = false;}
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// protected by MMapThread::mLock
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bool isSilenced_l() const { return mSilenced; }
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// protected by MMapThread::mLock
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bool getAndSetSilencedNotified_l() { bool silencedNotified = mSilencedNotified;
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mSilencedNotified = true;
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return silencedNotified; }
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private:
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friend class MmapThread;
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DISALLOW_COPY_AND_ASSIGN(MmapTrack);
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// AudioBufferProvider interface
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virtual status_t getNextBuffer(AudioBufferProvider::Buffer* buffer);
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// releaseBuffer() not overridden
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// ExtendedAudioBufferProvider interface
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virtual size_t framesReady() const;
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virtual int64_t framesReleased() const;
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virtual void onTimestamp(const ExtendedTimestamp ×tamp);
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pid_t mPid;
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bool mSilenced; // protected by MMapThread::mLock
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bool mSilencedNotified; // protected by MMapThread::mLock
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}; // end of Track
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