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** Copyright 2008, 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
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** See the License for the specific language governing permissions and
** limitations under the License.
#include <arpa/inet.h>
#include <utils/threads.h>
#include <utils/Errors.h>
#include <utils/KeyedVector.h>
#include <utils/String8.h>
#include <utils/Vector.h>
#include <media/MediaPlayerInterface.h>
#include <media/Metadata.h>
#include <media/stagefright/foundation/ABase.h>
#include <system/audio.h>
namespace android {
struct AudioPlaybackRate;
class AudioTrack;
struct AVSyncSettings;
class DeathNotifier;
class IDataSource;
class IMediaRecorder;
class IMediaMetadataRetriever;
class IRemoteDisplay;
class IRemoteDisplayClient;
class MediaRecorderClient;
class Antagonizer {
Antagonizer(const sp<MediaPlayerBase::Listener> &listener);
void start() { mActive = true; }
void stop() { mActive = false; }
void kill();
static const int interval;
static int callbackThread(void* cookie);
Mutex mLock;
Condition mCondition;
bool mExit;
bool mActive;
sp<MediaPlayerBase::Listener> mListener;
class MediaPlayerService : public BnMediaPlayerService
class Client;
class AudioOutput : public MediaPlayerBase::AudioSink
class CallbackData;
audio_session_t sessionId,
uid_t uid,
int pid,
const audio_attributes_t * attr,
const sp<AudioSystem::AudioDeviceCallback>& deviceCallback);
virtual ~AudioOutput();
virtual bool ready() const { return mTrack != 0; }
virtual ssize_t bufferSize() const;
virtual ssize_t frameCount() const;
virtual ssize_t channelCount() const;
virtual ssize_t frameSize() const;
virtual uint32_t latency() const;
virtual float msecsPerFrame() const;
virtual status_t getPosition(uint32_t *position) const;
virtual status_t getTimestamp(AudioTimestamp &ts) const;
virtual int64_t getPlayedOutDurationUs(int64_t nowUs) const;
virtual status_t getFramesWritten(uint32_t *frameswritten) const;
virtual audio_session_t getSessionId() const;
virtual uint32_t getSampleRate() const;
virtual int64_t getBufferDurationInUs() const;
virtual status_t open(
uint32_t sampleRate, int channelCount, audio_channel_mask_t channelMask,
audio_format_t format, int bufferCount,
AudioCallback cb, void *cookie,
audio_output_flags_t flags = AUDIO_OUTPUT_FLAG_NONE,
const audio_offload_info_t *offloadInfo = NULL,
bool doNotReconnect = false,
uint32_t suggestedFrameCount = 0);
virtual status_t start();
virtual ssize_t write(const void* buffer, size_t size, bool blocking = true);
virtual void stop();
virtual void flush();
virtual void pause();
virtual void close();
void setAudioStreamType(audio_stream_type_t streamType);
virtual audio_stream_type_t getAudioStreamType() const { return mStreamType; }
void setAudioAttributes(const audio_attributes_t * attributes);
void setVolume(float left, float right);
virtual status_t setPlaybackRate(const AudioPlaybackRate& rate);
virtual status_t getPlaybackRate(AudioPlaybackRate* rate /* nonnull */);
status_t setAuxEffectSendLevel(float level);
status_t attachAuxEffect(int effectId);
virtual status_t dump(int fd, const Vector<String16>& args) const;
static bool isOnEmulator();
static int getMinBufferCount();
void setNextOutput(const sp<AudioOutput>& nextOutput);
void switchToNextOutput();
virtual bool needsTrailingPadding() { return mNextOutput == NULL; }
virtual status_t setParameters(const String8& keyValuePairs);
virtual String8 getParameters(const String8& keys);
virtual media::VolumeShaper::Status applyVolumeShaper(
const sp<media::VolumeShaper::Configuration>& configuration,
const sp<media::VolumeShaper::Operation>& operation) override;
virtual sp<media::VolumeShaper::State> getVolumeShaperState(int id) override;
// AudioRouting
virtual status_t setOutputDevice(audio_port_handle_t deviceId);
virtual status_t getRoutedDeviceId(audio_port_handle_t* deviceId);
virtual status_t enableAudioDeviceCallback(bool enabled);
static void setMinBufferCount();
static void CallbackWrapper(
int event, void *me, void *info);
void deleteRecycledTrack_l();
void close_l();
status_t updateTrack();
sp<AudioTrack> mTrack;
sp<AudioTrack> mRecycledTrack;
sp<AudioOutput> mNextOutput;
AudioCallback mCallback;
void * mCallbackCookie;
CallbackData * mCallbackData;
audio_stream_type_t mStreamType;
audio_attributes_t * mAttributes;
float mLeftVolume;
float mRightVolume;
AudioPlaybackRate mPlaybackRate;
uint32_t mSampleRateHz; // sample rate of the content, as set in open()
float mMsecsPerFrame;
size_t mFrameSize;
audio_session_t mSessionId;
uid_t mUid;
int mPid;
float mSendLevel;
int mAuxEffectId;
audio_output_flags_t mFlags;
sp<media::VolumeHandler> mVolumeHandler;
audio_port_handle_t mSelectedDeviceId;
audio_port_handle_t mRoutedDeviceId;
bool mDeviceCallbackEnabled;
wp<AudioSystem::AudioDeviceCallback> mDeviceCallback;
mutable Mutex mLock;
// static variables below not protected by mutex
static bool mIsOnEmulator;
static int mMinBufferCount; // 12 for emulator; otherwise 4
// CallbackData is what is passed to the AudioTrack as the "user" data.
// We need to be able to target this to a different Output on the fly,
// so we can't use the Output itself for this.
class CallbackData {
friend AudioOutput;
explicit CallbackData(AudioOutput *cookie) {
mData = cookie;
mSwitching = false;
AudioOutput * getOutput() const { return mData; }
void setOutput(AudioOutput* newcookie) { mData = newcookie; }
// lock/unlock are used by the callback before accessing the payload of this object
void lock() const { mLock.lock(); }
void unlock() const { mLock.unlock(); }
// tryBeginTrackSwitch/endTrackSwitch are used when the CallbackData is handed over
// to the next sink.
// tryBeginTrackSwitch() returns true only if it obtains the lock.
bool tryBeginTrackSwitch() {
LOG_ALWAYS_FATAL_IF(mSwitching, "tryBeginTrackSwitch() already called");
if (mLock.tryLock() != OK) {
return false;
mSwitching = true;
return true;
void endTrackSwitch() {
if (mSwitching) {
mSwitching = false;
AudioOutput * mData;
mutable Mutex mLock; // a recursive mutex might make this unnecessary.
bool mSwitching;
}; // AudioOutput
static void instantiate();
// IMediaPlayerService interface
virtual sp<IMediaRecorder> createMediaRecorder(const String16 &opPackageName);
void removeMediaRecorderClient(const wp<MediaRecorderClient>& client);
virtual sp<IMediaMetadataRetriever> createMetadataRetriever();
virtual sp<IMediaPlayer> create(const sp<IMediaPlayerClient>& client,
audio_session_t audioSessionId);
virtual sp<IMediaCodecList> getCodecList() const;
virtual sp<IRemoteDisplay> listenForRemoteDisplay(const String16 &opPackageName,
const sp<IRemoteDisplayClient>& client, const String8& iface);
virtual status_t dump(int fd, const Vector<String16>& args);
void removeClient(const wp<Client>& client);
bool hasClient(wp<Client> client);
enum {
AUDIO_PROCESS_DEATH = 3, // currently no need to track this
// Collect info of the codec usage from media player and media recorder
virtual void addBatteryData(uint32_t params);
// API for the Battery app to pull the data of codecs usage
virtual status_t pullBatteryData(Parcel* reply);
struct BatteryTracker {
// Collect info of the codec usage from media player and media recorder
void addBatteryData(uint32_t params);
// API for the Battery app to pull the data of codecs usage
status_t pullBatteryData(Parcel* reply);
// For battery usage tracking purpose
struct BatteryUsageInfo {
// how many streams are being played by one UID
int refCount;
// a temp variable to store the duration(ms) of audio codecs
// when we start a audio codec, we minus the system time from audioLastTime
// when we pause it, we add the system time back to the audioLastTime
// so after the pause, audioLastTime = pause time - start time
// if multiple audio streams are played (or recorded), then audioLastTime
// = the total playing time of all the streams
int32_t audioLastTime;
// when all the audio streams are being paused, we assign audioLastTime to
// this variable, so this value could be provided to the battery app
// in the next pullBatteryData call
int32_t audioTotalTime;
int32_t videoLastTime;
int32_t videoTotalTime;
KeyedVector<int, BatteryUsageInfo> mBatteryData;
enum {
struct BatteryAudioFlingerUsageInfo {
int refCount; // how many audio streams are being played
int deviceOn[NUM_AUDIO_DEVICES]; // whether the device is currently used
int32_t lastTime[NUM_AUDIO_DEVICES]; // in ms
// totalTime[]: total time of audio output devices usage
int32_t totalTime[NUM_AUDIO_DEVICES]; // in ms
// This varialble is used to record the usage of audio output device
// for battery app
BatteryAudioFlingerUsageInfo mBatteryAudio;
mutable Mutex mLock;
BatteryTracker mBatteryTracker;
class Client : public BnMediaPlayer {
// IMediaPlayer interface
virtual void disconnect();
virtual status_t setVideoSurfaceTexture(
const sp<IGraphicBufferProducer>& bufferProducer);
virtual status_t setBufferingSettings(const BufferingSettings& buffering) override;
virtual status_t getBufferingSettings(
BufferingSettings* buffering /* nonnull */) override;
virtual status_t prepareAsync();
virtual status_t start();
virtual status_t stop();
virtual status_t pause();
virtual status_t isPlaying(bool* state);
virtual status_t setPlaybackSettings(const AudioPlaybackRate& rate);
virtual status_t getPlaybackSettings(AudioPlaybackRate* rate /* nonnull */);
virtual status_t setSyncSettings(const AVSyncSettings& rate, float videoFpsHint);
virtual status_t getSyncSettings(AVSyncSettings* rate /* nonnull */,
float* videoFps /* nonnull */);
virtual status_t seekTo(
int msec,
MediaPlayerSeekMode mode = MediaPlayerSeekMode::SEEK_PREVIOUS_SYNC);
virtual status_t getCurrentPosition(int* msec);
virtual status_t getDuration(int* msec);
virtual status_t reset();
virtual status_t notifyAt(int64_t mediaTimeUs);
virtual status_t setAudioStreamType(audio_stream_type_t type);
virtual status_t setLooping(int loop);
virtual status_t setVolume(float leftVolume, float rightVolume);
virtual status_t invoke(const Parcel& request, Parcel *reply);
virtual status_t setMetadataFilter(const Parcel& filter);
virtual status_t getMetadata(bool update_only,
bool apply_filter,
Parcel *reply);
virtual status_t setAuxEffectSendLevel(float level);
virtual status_t attachAuxEffect(int effectId);
virtual status_t setParameter(int key, const Parcel &request);
virtual status_t getParameter(int key, Parcel *reply);
virtual status_t setRetransmitEndpoint(const struct sockaddr_in* endpoint);
virtual status_t getRetransmitEndpoint(struct sockaddr_in* endpoint);
virtual status_t setNextPlayer(const sp<IMediaPlayer>& player);
virtual media::VolumeShaper::Status applyVolumeShaper(
const sp<media::VolumeShaper::Configuration>& configuration,
const sp<media::VolumeShaper::Operation>& operation) override;
virtual sp<media::VolumeShaper::State> getVolumeShaperState(int id) override;
sp<MediaPlayerBase> createPlayer(player_type playerType);
virtual status_t setDataSource(
const sp<IMediaHTTPService> &httpService,
const char *url,
const KeyedVector<String8, String8> *headers);
virtual status_t setDataSource(int fd, int64_t offset, int64_t length);
virtual status_t setDataSource(const sp<IStreamSource> &source);
virtual status_t setDataSource(const sp<IDataSource> &source);
sp<MediaPlayerBase> setDataSource_pre(player_type playerType);
status_t setDataSource_post(const sp<MediaPlayerBase>& p,
status_t status);
void notify(int msg, int ext1, int ext2, const Parcel *obj);
pid_t pid() const { return mPid; }
virtual status_t dump(int fd, const Vector<String16>& args);
audio_session_t getAudioSessionId() { return mAudioSessionId; }
// Modular DRM
virtual status_t prepareDrm(const uint8_t uuid[16], const Vector<uint8_t>& drmSessionId);
virtual status_t releaseDrm();
// AudioRouting
virtual status_t setOutputDevice(audio_port_handle_t deviceId);
virtual status_t getRoutedDeviceId(audio_port_handle_t* deviceId);
virtual status_t enableAudioDeviceCallback(bool enabled);
class AudioDeviceUpdatedNotifier: public AudioSystem::AudioDeviceCallback
AudioDeviceUpdatedNotifier(const sp<MediaPlayerBase>& listener) {
mListener = listener;
~AudioDeviceUpdatedNotifier() {}
virtual void onAudioDeviceUpdate(audio_io_handle_t audioIo,
audio_port_handle_t deviceId);
wp<MediaPlayerBase> mListener;
friend class MediaPlayerService;
Client( const sp<MediaPlayerService>& service,
pid_t pid,
int32_t connId,
const sp<IMediaPlayerClient>& client,
audio_session_t audioSessionId,
uid_t uid);
virtual ~Client();
void deletePlayer();
sp<MediaPlayerBase> getPlayer() const { Mutex::Autolock lock(mLock); return mPlayer; }
// @param type Of the metadata to be tested.
// @return true if the metadata should be dropped according to
// the filters.
bool shouldDropMetadata(media::Metadata::Type type) const;
// Add a new element to the set of metadata updated. Noop if
// the element exists already.
// @param type Of the metadata to be recorded.
void addNewMetadataUpdate(media::Metadata::Type type);
// Disconnect from the currently connected ANativeWindow.
void disconnectNativeWindow_l();
status_t setAudioAttributes_l(const Parcel &request);
class Listener : public MediaPlayerBase::Listener {
Listener(const wp<Client> &client) : mClient(client) {}
virtual ~Listener() {}
virtual void notify(int msg, int ext1, int ext2, const Parcel *obj) {
sp<Client> client = mClient.promote();
if (client != NULL) {
client->notify(msg, ext1, ext2, obj);
wp<Client> mClient;
mutable Mutex mLock;
sp<MediaPlayerBase> mPlayer;
sp<MediaPlayerService> mService;
sp<IMediaPlayerClient> mClient;
sp<AudioOutput> mAudioOutput;
pid_t mPid;
status_t mStatus;
bool mLoop;
int32_t mConnId;
audio_session_t mAudioSessionId;
audio_attributes_t * mAudioAttributes;
uid_t mUid;
sp<ANativeWindow> mConnectedWindow;
sp<IBinder> mConnectedWindowBinder;
struct sockaddr_in mRetransmitEndpoint;
bool mRetransmitEndpointValid;
sp<Client> mNextClient;
sp<MediaPlayerBase::Listener> mListener;
// Metadata filters.
media::Metadata::Filter mMetadataAllow; // protected by mLock
media::Metadata::Filter mMetadataDrop; // protected by mLock
// Metadata updated. For each MEDIA_INFO_METADATA_UPDATE
// notification we try to update mMetadataUpdated which is a
// set: no duplicate.
// getMetadata clears this set.
media::Metadata::Filter mMetadataUpdated; // protected by mLock
std::vector<DeathNotifier> mDeathNotifiers;
sp<AudioDeviceUpdatedNotifier> mAudioDeviceUpdatedListener;
Antagonizer* mAntagonizer;
}; // Client
// ----------------------------------------------------------------------------
virtual ~MediaPlayerService();
mutable Mutex mLock;
SortedVector< wp<Client> > mClients;
SortedVector< wp<MediaRecorderClient> > mMediaRecorderClients;
int32_t mNextConnId;
// ----------------------------------------------------------------------------
}; // namespace android