blob: eb640bb17e37eee1b666859afa4f91617beb2e2e [file] [log] [blame]
/*
**
** Copyright 2017, 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 INCLUDING_FROM_AUDIOFLINGER_H
#error This header file should only be included from AudioFlinger.h
#endif
// playback track
class MmapTrack : public TrackBase {
public:
MmapTrack(ThreadBase *thread,
const audio_attributes_t& attr,
uint32_t sampleRate,
audio_format_t format,
audio_channel_mask_t channelMask,
audio_session_t sessionId,
bool isOut,
const android::content::AttributionSourceState& attributionSource,
pid_t creatorPid,
audio_port_handle_t portId = AUDIO_PORT_HANDLE_NONE);
virtual ~MmapTrack();
// TrackBase virtual
virtual status_t initCheck() const;
virtual status_t start(AudioSystem::sync_event_t event,
audio_session_t triggerSession);
virtual void stop();
virtual bool isFastTrack() const { return false; }
bool isDirect() const override { return true; }
void appendDumpHeader(String8& result);
void appendDump(String8& result, bool active);
// protected by MMapThread::mLock
void setSilenced_l(bool silenced) { mSilenced = silenced;
mSilencedNotified = false;}
// protected by MMapThread::mLock
bool isSilenced_l() const { return mSilenced; }
// protected by MMapThread::mLock
bool getAndSetSilencedNotified_l() { bool silencedNotified = mSilencedNotified;
mSilencedNotified = true;
return silencedNotified; }
private:
friend class MmapThread;
DISALLOW_COPY_AND_ASSIGN(MmapTrack);
// AudioBufferProvider interface
virtual status_t getNextBuffer(AudioBufferProvider::Buffer* buffer);
// releaseBuffer() not overridden
// ExtendedAudioBufferProvider interface
virtual size_t framesReady() const;
virtual int64_t framesReleased() const;
virtual void onTimestamp(const ExtendedTimestamp &timestamp);
pid_t mPid;
bool mSilenced; // protected by MMapThread::mLock
bool mSilencedNotified; // protected by MMapThread::mLock
}; // end of Track