diff options
Diffstat (limited to 'include/media/SoundPool.h')
| -rw-r--r-- | include/media/SoundPool.h | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/include/media/SoundPool.h b/include/media/SoundPool.h new file mode 100644 index 0000000..002b045 --- /dev/null +++ b/include/media/SoundPool.h @@ -0,0 +1,238 @@ +/* + * Copyright (C) 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 SOUNDPOOL_H_ +#define SOUNDPOOL_H_ + +#include <utils/threads.h> +#include <utils/List.h> +#include <utils/Vector.h> +#include <utils/KeyedVector.h> +#include <media/AudioTrack.h> + +namespace android { + +static const int IDLE_PRIORITY = -1; + +// forward declarations +class SoundEvent; +class SoundPoolThread; +class SoundPool; + +// for queued events +class SoundPoolEvent { +public: + SoundPoolEvent(int msg, int arg1=0, int arg2=0) : + mMsg(msg), mArg1(arg1), mArg2(arg2) {} + int mMsg; + int mArg1; + int mArg2; + enum MessageType { INVALID, SAMPLE_LOADED }; +}; + +// callback function prototype +typedef void SoundPoolCallback(SoundPoolEvent event, SoundPool* soundPool, void* user); + +// tracks samples used by application +class Sample : public RefBase { +public: + enum sample_state { UNLOADED, LOADING, READY, UNLOADING }; + Sample(int sampleID, const char* url); + Sample(int sampleID, int fd, int64_t offset, int64_t length); + ~Sample(); + int sampleID() { return mSampleID; } + int numChannels() { return mNumChannels; } + int sampleRate() { return mSampleRate; } + audio_format_t format() { return mFormat; } + size_t size() { return mSize; } + int state() { return mState; } + uint8_t* data() { return static_cast<uint8_t*>(mData->pointer()); } + status_t doLoad(); + void startLoad() { mState = LOADING; } + sp<IMemory> getIMemory() { return mData; } + + // hack + void init(int numChannels, int sampleRate, audio_format_t format, size_t size, sp<IMemory> data ) { + mNumChannels = numChannels; mSampleRate = sampleRate; mFormat = format; mSize = size; mData = data; } + +private: + void init(); + + size_t mSize; + volatile int32_t mRefCount; + uint16_t mSampleID; + uint16_t mSampleRate; + uint8_t mState : 3; + uint8_t mNumChannels : 2; + audio_format_t mFormat; + int mFd; + int64_t mOffset; + int64_t mLength; + char* mUrl; + sp<IMemory> mData; +}; + +// stores pending events for stolen channels +class SoundEvent +{ +public: + SoundEvent() : mChannelID(0), mLeftVolume(0), mRightVolume(0), + mPriority(IDLE_PRIORITY), mLoop(0), mRate(0) {} + void set(const sp<Sample>& sample, int channelID, float leftVolume, + float rightVolume, int priority, int loop, float rate); + sp<Sample> sample() { return mSample; } + int channelID() { return mChannelID; } + float leftVolume() { return mLeftVolume; } + float rightVolume() { return mRightVolume; } + int priority() { return mPriority; } + int loop() { return mLoop; } + float rate() { return mRate; } + void clear() { mChannelID = 0; mSample.clear(); } + +protected: + sp<Sample> mSample; + int mChannelID; + float mLeftVolume; + float mRightVolume; + int mPriority; + int mLoop; + float mRate; +}; + +// for channels aka AudioTracks +class SoundChannel : public SoundEvent { +public: + enum state { IDLE, RESUMING, STOPPING, PAUSED, PLAYING }; + SoundChannel() : mAudioTrack(NULL), mState(IDLE), mNumChannels(1), + mPos(0), mToggle(0), mAutoPaused(false) {} + ~SoundChannel(); + void init(SoundPool* soundPool); + void play(const sp<Sample>& sample, int channelID, float leftVolume, float rightVolume, + int priority, int loop, float rate); + void setVolume_l(float leftVolume, float rightVolume); + void setVolume(float leftVolume, float rightVolume); + void stop_l(); + void stop(); + void pause(); + void autoPause(); + void resume(); + void autoResume(); + void setRate(float rate); + int state() { return mState; } + void setPriority(int priority) { mPriority = priority; } + void setLoop(int loop); + int numChannels() { return mNumChannels; } + void clearNextEvent() { mNextEvent.clear(); } + void nextEvent(); + int nextChannelID() { return mNextEvent.channelID(); } + void dump(); + +private: + static void callback(int event, void* user, void *info); + void process(int event, void *info, unsigned long toggle); + bool doStop_l(); + + SoundPool* mSoundPool; + AudioTrack* mAudioTrack; + SoundEvent mNextEvent; + Mutex mLock; + int mState; + int mNumChannels; + int mPos; + int mAudioBufferSize; + unsigned long mToggle; + bool mAutoPaused; +}; + +// application object for managing a pool of sounds +class SoundPool { + friend class SoundPoolThread; + friend class SoundChannel; +public: + SoundPool(int maxChannels, audio_stream_type_t streamType, int srcQuality); + ~SoundPool(); + int load(const char* url, int priority); + int load(int fd, int64_t offset, int64_t length, int priority); + bool unload(int sampleID); + int play(int sampleID, float leftVolume, float rightVolume, int priority, + int loop, float rate); + void pause(int channelID); + void autoPause(); + void resume(int channelID); + void autoResume(); + void stop(int channelID); + void setVolume(int channelID, float leftVolume, float rightVolume); + void setPriority(int channelID, int priority); + void setLoop(int channelID, int loop); + void setRate(int channelID, float rate); + audio_stream_type_t streamType() const { return mStreamType; } + int srcQuality() const { return mSrcQuality; } + + // called from SoundPoolThread + void sampleLoaded(int sampleID); + + // called from AudioTrack thread + void done_l(SoundChannel* channel); + + // callback function + void setCallback(SoundPoolCallback* callback, void* user); + void* getUserData() { return mUserData; } + +private: + SoundPool() {} // no default constructor + bool startThreads(); + void doLoad(sp<Sample>& sample); + sp<Sample> findSample(int sampleID) { return mSamples.valueFor(sampleID); } + SoundChannel* findChannel (int channelID); + SoundChannel* findNextChannel (int channelID); + SoundChannel* allocateChannel_l(int priority); + void moveToFront_l(SoundChannel* channel); + void notify(SoundPoolEvent event); + void dump(); + + // restart thread + void addToRestartList(SoundChannel* channel); + void addToStopList(SoundChannel* channel); + static int beginThread(void* arg); + int run(); + void quit(); + + Mutex mLock; + Mutex mRestartLock; + Condition mCondition; + SoundPoolThread* mDecodeThread; + SoundChannel* mChannelPool; + List<SoundChannel*> mChannels; + List<SoundChannel*> mRestart; + List<SoundChannel*> mStop; + DefaultKeyedVector< int, sp<Sample> > mSamples; + int mMaxChannels; + audio_stream_type_t mStreamType; + int mSrcQuality; + int mAllocated; + int mNextSampleID; + int mNextChannelID; + bool mQuit; + + // callback + Mutex mCallbackLock; + SoundPoolCallback* mCallback; + void* mUserData; +}; + +} // end namespace android + +#endif /*SOUNDPOOL_H_*/ |