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0e49d35fa4
replicant-frameworks_native/libs/audioflinger/AudioFlinger.h
Eric Laurent 0e49d35fa4 Improvements for issue 2197683: English IME key-press latency is noticeably higher on passion than sholes 
This change goes with a kernel driver change that reduces the audio buffer size from 4800 bytes (~27ms) to 3072 bytes (~17ms).
- The AudioFlinger modifcations in change 0bca68cfff161abbc992fec82dc7c88079dd1a36 have been removed: the short sleep period was counter productive when the AudioTrack is using the call back thread as it causes to many preemptions.
- AudioFlinger mixer thread now detects long standby exit time and in this case anticipates start by writing 0s as soon as a track is enabled even if not ready for mixing.
- AudioTrack::start() is modified to start call back thread before starting the IAudioTrack so that thread startup time is masked by IAudioTrack start and mixer thread wakeup time.
2009-11-11 12:13:27 -08:00

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/* //device/include/server/AudioFlinger/AudioFlinger.h
**
** Copyright 2007, 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_FLINGER_H
#define ANDROID_AUDIO_FLINGER_H
#include <stdint.h>
#include <sys/types.h>
#include <media/IAudioFlinger.h>
#include <media/IAudioFlingerClient.h>
#include <media/IAudioTrack.h>
#include <media/IAudioRecord.h>
#include <media/AudioTrack.h>
#include <utils/Atomic.h>
#include <utils/Errors.h>
#include <utils/threads.h>
#include <binder/MemoryDealer.h>
#include <utils/SortedVector.h>
#include <utils/Vector.h>
#include <hardware_legacy/AudioHardwareInterface.h>
#include "AudioBufferProvider.h"
namespace android {
class audio_track_cblk_t;
class AudioMixer;
class AudioBuffer;
class AudioResampler;
// ----------------------------------------------------------------------------
#define LIKELY( exp ) (__builtin_expect( (exp) != 0, true ))
#define UNLIKELY( exp ) (__builtin_expect( (exp) != 0, false ))
// ----------------------------------------------------------------------------
static const nsecs_t kStandbyTimeInNsecs = seconds(3);
class AudioFlinger : public BnAudioFlinger, public IBinder::DeathRecipient
{
public:
static void instantiate();
virtual status_t dump(int fd, const Vector<String16>& args);
// IAudioFlinger interface
virtual sp<IAudioTrack> createTrack(
pid_t pid,
int streamType,
uint32_t sampleRate,
int format,
int channelCount,
int frameCount,
uint32_t flags,
const sp<IMemory>& sharedBuffer,
int output,
status_t *status);
virtual uint32_t sampleRate(int output) const;
virtual int channelCount(int output) const;
virtual int format(int output) const;
virtual size_t frameCount(int output) const;
virtual uint32_t latency(int output) const;
virtual status_t setMasterVolume(float value);
virtual status_t setMasterMute(bool muted);
virtual float masterVolume() const;
virtual bool masterMute() const;
virtual status_t setStreamVolume(int stream, float value, int output);
virtual status_t setStreamMute(int stream, bool muted);
virtual float streamVolume(int stream, int output) const;
virtual bool streamMute(int stream) const;
virtual status_t setMode(int mode);
virtual status_t setMicMute(bool state);
virtual bool getMicMute() const;
virtual bool isMusicActive() const;
virtual status_t setParameters(int ioHandle, const String8& keyValuePairs);
virtual String8 getParameters(int ioHandle, const String8& keys);
virtual void registerClient(const sp<IAudioFlingerClient>& client);
virtual size_t getInputBufferSize(uint32_t sampleRate, int format, int channelCount);
virtual int openOutput(uint32_t *pDevices,
uint32_t *pSamplingRate,
uint32_t *pFormat,
uint32_t *pChannels,
uint32_t *pLatencyMs,
uint32_t flags);
virtual int openDuplicateOutput(int output1, int output2);
virtual status_t closeOutput(int output);
virtual status_t suspendOutput(int output);
virtual status_t restoreOutput(int output);
virtual int openInput(uint32_t *pDevices,
uint32_t *pSamplingRate,
uint32_t *pFormat,
uint32_t *pChannels,
uint32_t acoustics);
virtual status_t closeInput(int input);
virtual status_t setStreamOutput(uint32_t stream, int output);
virtual status_t setVoiceVolume(float volume);
// IBinder::DeathRecipient
virtual void binderDied(const wp<IBinder>& who);
enum hardware_call_state {
AUDIO_HW_IDLE = 0,
AUDIO_HW_INIT,
AUDIO_HW_OUTPUT_OPEN,
AUDIO_HW_OUTPUT_CLOSE,
AUDIO_HW_INPUT_OPEN,
AUDIO_HW_INPUT_CLOSE,
AUDIO_HW_STANDBY,
AUDIO_HW_SET_MASTER_VOLUME,
AUDIO_HW_GET_ROUTING,
AUDIO_HW_SET_ROUTING,
AUDIO_HW_GET_MODE,
AUDIO_HW_SET_MODE,
AUDIO_HW_GET_MIC_MUTE,
AUDIO_HW_SET_MIC_MUTE,
AUDIO_SET_VOICE_VOLUME,
AUDIO_SET_PARAMETER,
};
// record interface
virtual sp<IAudioRecord> openRecord(
pid_t pid,
int input,
uint32_t sampleRate,
int format,
int channelCount,
int frameCount,
uint32_t flags,
status_t *status);
virtual status_t onTransact(
uint32_t code,
const Parcel& data,
Parcel* reply,
uint32_t flags);
private:
AudioFlinger();
virtual ~AudioFlinger();
// Internal dump utilites.
status_t dumpPermissionDenial(int fd, const Vector<String16>& args);
status_t dumpClients(int fd, const Vector<String16>& args);
status_t dumpInternals(int fd, const Vector<String16>& args);
// --- Client ---
class Client : public RefBase {
public:
Client(const sp<AudioFlinger>& audioFlinger, pid_t pid);
virtual ~Client();
const sp<MemoryDealer>& heap() const;
pid_t pid() const { return mPid; }
sp<AudioFlinger> audioFlinger() { return mAudioFlinger; }
private:
Client(const Client&);
Client& operator = (const Client&);
sp<AudioFlinger> mAudioFlinger;
sp<MemoryDealer> mMemoryDealer;
pid_t mPid;
};
class TrackHandle;
class RecordHandle;
class RecordThread;
class PlaybackThread;
class MixerThread;
class DirectOutputThread;
class Track;
class RecordTrack;
class ThreadBase : public Thread {
public:
ThreadBase (const sp<AudioFlinger>& audioFlinger);
virtual ~ThreadBase();
status_t dumpBase(int fd, const Vector<String16>& args);
// base for record and playback
class TrackBase : public AudioBufferProvider, public RefBase {
public:
enum track_state {
IDLE,
TERMINATED,
STOPPED,
RESUMING,
ACTIVE,
PAUSING,
PAUSED
};
enum track_flags {
STEPSERVER_FAILED = 0x01, // StepServer could not acquire cblk->lock mutex
SYSTEM_FLAGS_MASK = 0x0000ffffUL,
// The upper 16 bits are used for track-specific flags.
};
TrackBase(const wp<ThreadBase>& thread,
const sp<Client>& client,
uint32_t sampleRate,
int format,
int channelCount,
int frameCount,
uint32_t flags,
const sp<IMemory>& sharedBuffer);
~TrackBase();
virtual status_t start() = 0;
virtual void stop() = 0;
sp<IMemory> getCblk() const;
audio_track_cblk_t* cblk() const { return mCblk; }
protected:
friend class ThreadBase;
friend class RecordHandle;
friend class PlaybackThread;
friend class RecordThread;
friend class MixerThread;
friend class DirectOutputThread;
TrackBase(const TrackBase&);
TrackBase& operator = (const TrackBase&);
virtual status_t getNextBuffer(AudioBufferProvider::Buffer* buffer) = 0;
virtual void releaseBuffer(AudioBufferProvider::Buffer* buffer);
int format() const {
return mFormat;
}
int channelCount() const ;
int sampleRate() const;
void* getBuffer(uint32_t offset, uint32_t frames) const;
bool isStopped() const {
return mState == STOPPED;
}
bool isTerminated() const {
return mState == TERMINATED;
}
bool step();
void reset();
wp<ThreadBase> mThread;
sp<Client> mClient;
sp<IMemory> mCblkMemory;
audio_track_cblk_t* mCblk;
void* mBuffer;
void* mBufferEnd;
uint32_t mFrameCount;
// we don't really need a lock for these
int mState;
int mClientTid;
uint8_t mFormat;
uint32_t mFlags;
};
class ConfigEvent {
public:
ConfigEvent() : mEvent(0), mParam(0) {}
int mEvent;
int mParam;
};
uint32_t sampleRate() const;
int channelCount() const;
int format() const;
size_t frameCount() const;
void wakeUp() { mWaitWorkCV.broadcast(); }
void exit();
virtual bool checkForNewParameters_l() = 0;
virtual status_t setParameters(const String8& keyValuePairs);
virtual String8 getParameters(const String8& keys) = 0;
virtual void audioConfigChanged(int event, int param = 0) = 0;
void sendConfigEvent(int event, int param = 0);
void sendConfigEvent_l(int event, int param = 0);
void processConfigEvents();
mutable Mutex mLock;
protected:
friend class Track;
friend class TrackBase;
friend class PlaybackThread;
friend class MixerThread;
friend class DirectOutputThread;
friend class DuplicatingThread;
friend class RecordThread;
friend class RecordTrack;
Condition mWaitWorkCV;
sp<AudioFlinger> mAudioFlinger;
uint32_t mSampleRate;
size_t mFrameCount;
int mChannelCount;
int mFormat;
uint32_t mFrameSize;
Condition mParamCond;
Vector<String8> mNewParameters;
status_t mParamStatus;
Vector<ConfigEvent *> mConfigEvents;
bool mStandby;
};
// --- PlaybackThread ---
class PlaybackThread : public ThreadBase {
public:
enum type {
MIXER,
DIRECT,
DUPLICATING
};
enum mixer_state {
MIXER_IDLE,
MIXER_TRACKS_ENABLED,
MIXER_TRACKS_READY
};
// playback track
class Track : public TrackBase {
public:
Track( const wp<ThreadBase>& thread,
const sp<Client>& client,
int streamType,
uint32_t sampleRate,
int format,
int channelCount,
int frameCount,
const sp<IMemory>& sharedBuffer);
~Track();
void dump(char* buffer, size_t size);
virtual status_t start();
virtual void stop();
void pause();
void flush();
void destroy();
void mute(bool);
void setVolume(float left, float right);
int name() const {
return mName;
}
int type() const {
return mStreamType;
}
protected:
friend class ThreadBase;
friend class AudioFlinger;
friend class TrackHandle;
friend class PlaybackThread;
friend class MixerThread;
friend class DirectOutputThread;
Track(const Track&);
Track& operator = (const Track&);
virtual status_t getNextBuffer(AudioBufferProvider::Buffer* buffer);
bool isMuted() { return mMute; }
bool isPausing() const {
return mState == PAUSING;
}
bool isPaused() const {
return mState == PAUSED;
}
bool isReady() const;
void setPaused() { mState = PAUSED; }
void reset();
// we don't really need a lock for these
float mVolume[2];
volatile bool mMute;
// FILLED state is used for suppressing volume ramp at begin of playing
enum {FS_FILLING, FS_FILLED, FS_ACTIVE};
mutable uint8_t mFillingUpStatus;
int8_t mRetryCount;
sp<IMemory> mSharedBuffer;
bool mResetDone;
int mStreamType;
int mName;
}; // end of Track
// playback track
class OutputTrack : public Track {
public:
class Buffer: public AudioBufferProvider::Buffer {
public:
int16_t *mBuffer;
};
OutputTrack( const wp<ThreadBase>& thread,
uint32_t sampleRate,
int format,
int channelCount,
int frameCount);
~OutputTrack();
virtual status_t start();
virtual void stop();
bool write(int16_t* data, uint32_t frames);
bool bufferQueueEmpty() { return (mBufferQueue.size() == 0) ? true : false; }
bool isActive() { return mActive; }
wp<ThreadBase>& thread() { return mThread; }
private:
status_t obtainBuffer(AudioBufferProvider::Buffer* buffer, uint32_t waitTimeMs);
void clearBufferQueue();
// Maximum number of pending buffers allocated by OutputTrack::write()
static const uint8_t kMaxOverFlowBuffers = 3;
Vector < Buffer* > mBufferQueue;
AudioBufferProvider::Buffer mOutBuffer;
uint32_t mWaitTimeMs;
bool mActive;
}; // end of OutputTrack
PlaybackThread (const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output);
virtual ~PlaybackThread();
virtual status_t dump(int fd, const Vector<String16>& args);
// Thread virtuals
virtual status_t readyToRun();
virtual void onFirstRef();
virtual uint32_t latency() const;
virtual status_t setMasterVolume(float value);
virtual status_t setMasterMute(bool muted);
virtual float masterVolume() const;
virtual bool masterMute() const;
virtual status_t setStreamVolume(int stream, float value);
virtual status_t setStreamMute(int stream, bool muted);
virtual float streamVolume(int stream) const;
virtual bool streamMute(int stream) const;
bool isMusicActive() const;
sp<Track> createTrack_l(
const sp<AudioFlinger::Client>& client,
int streamType,
uint32_t sampleRate,
int format,
int channelCount,
int frameCount,
const sp<IMemory>& sharedBuffer,
status_t *status);
AudioStreamOut* getOutput() { return mOutput; }
virtual int type() const { return mType; }
void suspend() { mSuspended++; }
void restore() { if (mSuspended) mSuspended--; }
virtual String8 getParameters(const String8& keys);
virtual void audioConfigChanged(int event, int param = 0);
struct stream_type_t {
stream_type_t()
: volume(1.0f),
mute(false)
{
}
float volume;
bool mute;
};
protected:
int mType;
int16_t* mMixBuffer;
int mSuspended;
int mBytesWritten;
bool mMasterMute;
SortedVector< wp<Track> > mActiveTracks;
virtual int getTrackName_l() = 0;
virtual void deleteTrackName_l(int name) = 0;
virtual uint32_t activeSleepTimeUs() = 0;
virtual uint32_t idleSleepTimeUs() = 0;
private:
friend class AudioFlinger;
friend class OutputTrack;
friend class Track;
friend class TrackBase;
friend class MixerThread;
friend class DirectOutputThread;
friend class DuplicatingThread;
PlaybackThread(const Client&);
PlaybackThread& operator = (const PlaybackThread&);
status_t addTrack_l(const sp<Track>& track);
void destroyTrack_l(const sp<Track>& track);
void readOutputParameters();
virtual status_t dumpInternals(int fd, const Vector<String16>& args);
status_t dumpTracks(int fd, const Vector<String16>& args);
SortedVector< sp<Track> > mTracks;
// mStreamTypes[] uses 1 additionnal stream type internally for the OutputTrack used by DuplicatingThread
stream_type_t mStreamTypes[AudioSystem::NUM_STREAM_TYPES + 1];
AudioStreamOut* mOutput;
float mMasterVolume;
nsecs_t mLastWriteTime;
int mNumWrites;
int mNumDelayedWrites;
bool mInWrite;
};
class MixerThread : public PlaybackThread {
public:
MixerThread (const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output);
virtual ~MixerThread();
// Thread virtuals
virtual bool threadLoop();
void getTracks(SortedVector < sp<Track> >& tracks,
SortedVector < wp<Track> >& activeTracks,
int streamType);
void putTracks(SortedVector < sp<Track> >& tracks,
SortedVector < wp<Track> >& activeTracks);
virtual bool checkForNewParameters_l();
virtual status_t dumpInternals(int fd, const Vector<String16>& args);
protected:
uint32_t prepareTracks_l(const SortedVector< wp<Track> >& activeTracks, Vector< sp<Track> > *tracksToRemove);
virtual int getTrackName_l();
virtual void deleteTrackName_l(int name);
virtual uint32_t activeSleepTimeUs();
virtual uint32_t idleSleepTimeUs();
AudioMixer* mAudioMixer;
};
class DirectOutputThread : public PlaybackThread {
public:
DirectOutputThread (const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output);
~DirectOutputThread();
// Thread virtuals
virtual bool threadLoop();
virtual bool checkForNewParameters_l();
protected:
virtual int getTrackName_l();
virtual void deleteTrackName_l(int name);
virtual uint32_t activeSleepTimeUs();
virtual uint32_t idleSleepTimeUs();
private:
float mLeftVolume;
float mRightVolume;
};
class DuplicatingThread : public MixerThread {
public:
DuplicatingThread (const sp<AudioFlinger>& audioFlinger, MixerThread* mainThread);
~DuplicatingThread();
// Thread virtuals
virtual bool threadLoop();
void addOutputTrack(MixerThread* thread);
void removeOutputTrack(MixerThread* thread);
private:
SortedVector < sp<OutputTrack> > mOutputTracks;
};
PlaybackThread *checkPlaybackThread_l(int output) const;
MixerThread *checkMixerThread_l(int output) const;
RecordThread *checkRecordThread_l(int input) const;
float streamVolumeInternal(int stream) const { return mStreamTypes[stream].volume; }
void audioConfigChanged_l(int event, const sp<ThreadBase>& thread, void *param2);
friend class AudioBuffer;
class TrackHandle : public android::BnAudioTrack {
public:
TrackHandle(const sp<PlaybackThread::Track>& track);
virtual ~TrackHandle();
virtual status_t start();
virtual void stop();
virtual void flush();
virtual void mute(bool);
virtual void pause();
virtual void setVolume(float left, float right);
virtual sp<IMemory> getCblk() const;
virtual status_t onTransact(
uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags);
private:
sp<PlaybackThread::Track> mTrack;
};
friend class Client;
friend class PlaybackThread::Track;
void removeClient_l(pid_t pid);
// record thread
class RecordThread : public ThreadBase, public AudioBufferProvider
{
public:
// record track
class RecordTrack : public TrackBase {
public:
RecordTrack(const wp<ThreadBase>& thread,
const sp<Client>& client,
uint32_t sampleRate,
int format,
int channelCount,
int frameCount,
uint32_t flags);
~RecordTrack();
virtual status_t start();
virtual void stop();
bool overflow() { bool tmp = mOverflow; mOverflow = false; return tmp; }
bool setOverflow() { bool tmp = mOverflow; mOverflow = true; return tmp; }
void dump(char* buffer, size_t size);
private:
friend class AudioFlinger;
friend class RecordThread;
RecordTrack(const RecordTrack&);
RecordTrack& operator = (const RecordTrack&);
virtual status_t getNextBuffer(AudioBufferProvider::Buffer* buffer);
bool mOverflow;
};
RecordThread(const sp<AudioFlinger>& audioFlinger,
AudioStreamIn *input,
uint32_t sampleRate,
uint32_t channels);
~RecordThread();
virtual bool threadLoop();
virtual status_t readyToRun() { return NO_ERROR; }
virtual void onFirstRef();
status_t start(RecordTrack* recordTrack);
void stop(RecordTrack* recordTrack);
status_t dump(int fd, const Vector<String16>& args);
AudioStreamIn* getInput() { return mInput; }
virtual status_t getNextBuffer(AudioBufferProvider::Buffer* buffer);
virtual void releaseBuffer(AudioBufferProvider::Buffer* buffer);
virtual bool checkForNewParameters_l();
virtual String8 getParameters(const String8& keys);
virtual void audioConfigChanged(int event, int param = 0);
void readInputParameters();
private:
RecordThread();
AudioStreamIn *mInput;
sp<RecordTrack> mActiveTrack;
Condition mStartStopCond;
AudioResampler *mResampler;
int32_t *mRsmpOutBuffer;
int16_t *mRsmpInBuffer;
size_t mRsmpInIndex;
size_t mInputBytes;
int mReqChannelCount;
uint32_t mReqSampleRate;
};
class RecordHandle : public android::BnAudioRecord {
public:
RecordHandle(const sp<RecordThread::RecordTrack>& recordTrack);
virtual ~RecordHandle();
virtual status_t start();
virtual void stop();
virtual sp<IMemory> getCblk() const;
virtual status_t onTransact(
uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags);
private:
sp<RecordThread::RecordTrack> mRecordTrack;
};
friend class RecordThread;
friend class PlaybackThread;
mutable Mutex mLock;
DefaultKeyedVector< pid_t, wp<Client> > mClients;
mutable Mutex mHardwareLock;
AudioHardwareInterface* mAudioHardware;
mutable int mHardwareStatus;
DefaultKeyedVector< int, sp<PlaybackThread> > mPlaybackThreads;
PlaybackThread::stream_type_t mStreamTypes[AudioSystem::NUM_STREAM_TYPES];
float mMasterVolume;
bool mMasterMute;
DefaultKeyedVector< int, sp<RecordThread> > mRecordThreads;
SortedVector< sp<IBinder> > mNotificationClients;
int mNextThreadId;
};
// ----------------------------------------------------------------------------
}; // namespace android
#endif // ANDROID_AUDIO_FLINGER_H
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