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/*
* 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 ANDROID_MEDIAPLAYERINTERFACE_H
#define ANDROID_MEDIAPLAYERINTERFACE_H
#ifdef __cplusplus
#include <sys/types.h>
#include <utils/Errors.h>
#include <utils/KeyedVector.h>
#include <utils/String8.h>
#include <utils/RefBase.h>
#include <media/mediaplayer.h>
#include <media/AudioSystem.h>
#include <media/Metadata.h>
namespace android {
class Parcel;
class Surface;
class ISurfaceTexture;
template<typename T> class SortedVector;
enum player_type {
PV_PLAYER = 1,
SONIVOX_PLAYER = 2,
STAGEFRIGHT_PLAYER = 3,
NU_PLAYER = 4,
// Test players are available only in the 'test' and 'eng' builds.
// The shared library with the test player is passed passed as an
// argument to the 'test:' url in the setDataSource call.
TEST_PLAYER = 5,
};
#define DEFAULT_AUDIOSINK_BUFFERCOUNT 4
#define DEFAULT_AUDIOSINK_BUFFERSIZE 1200
#define DEFAULT_AUDIOSINK_SAMPLERATE 44100
// callback mechanism for passing messages to MediaPlayer object
typedef void (*notify_callback_f)(void* cookie,
int msg, int ext1, int ext2, const Parcel *obj);
// abstract base class - use MediaPlayerInterface
class MediaPlayerBase : public RefBase
{
public:
// AudioSink: abstraction layer for audio output
class AudioSink : public RefBase {
public:
// Callback returns the number of bytes actually written to the buffer.
typedef size_t (*AudioCallback)(
AudioSink *audioSink, void *buffer, size_t size, void *cookie);
virtual ~AudioSink() {}
virtual bool ready() const = 0; // audio output is open and ready
virtual bool realtime() const = 0; // audio output is real-time output
virtual ssize_t bufferSize() const = 0;
virtual ssize_t frameCount() const = 0;
virtual ssize_t channelCount() const = 0;
virtual ssize_t frameSize() const = 0;
virtual uint32_t latency() const = 0;
virtual float msecsPerFrame() const = 0;
virtual status_t getPosition(uint32_t *position) = 0;
virtual int getSessionId() = 0;
// If no callback is specified, use the "write" API below to submit
// audio data.
virtual status_t open(
uint32_t sampleRate, int channelCount,
audio_format_t format=AUDIO_FORMAT_PCM_16_BIT,
int bufferCount=DEFAULT_AUDIOSINK_BUFFERCOUNT,
AudioCallback cb = NULL,
void *cookie = NULL) = 0;
virtual void start() = 0;
virtual ssize_t write(const void* buffer, size_t size) = 0;
virtual void stop() = 0;
virtual void flush() = 0;
virtual void pause() = 0;
virtual void close() = 0;
};
MediaPlayerBase() : mCookie(0), mNotify(0) {}
virtual ~MediaPlayerBase() {}
virtual status_t initCheck() = 0;
virtual bool hardwareOutput() = 0;
virtual status_t setUID(uid_t uid) {
return INVALID_OPERATION;
}
virtual status_t setDataSource(
const char *url,
const KeyedVector<String8, String8> *headers = NULL) = 0;
virtual status_t setDataSource(int fd, int64_t offset, int64_t length) = 0;
virtual status_t setDataSource(const sp<IStreamSource> &source) {
return INVALID_OPERATION;
}
// pass the buffered ISurfaceTexture to the media player service
virtual status_t setVideoSurfaceTexture(
const sp<ISurfaceTexture>& surfaceTexture) = 0;
virtual status_t prepare() = 0;
virtual status_t prepareAsync() = 0;
virtual status_t start() = 0;
virtual status_t stop() = 0;
virtual status_t pause() = 0;
virtual bool isPlaying() = 0;
virtual status_t seekTo(int msec) = 0;
virtual status_t getCurrentPosition(int *msec) = 0;
virtual status_t getDuration(int *msec) = 0;
virtual status_t reset() = 0;
virtual status_t setLooping(int loop) = 0;
virtual player_type playerType() = 0;
virtual status_t setParameter(int key, const Parcel &request) = 0;
virtual status_t getParameter(int key, Parcel *reply) = 0;
// Invoke a generic method on the player by using opaque parcels
// for the request and reply.
//
// @param request Parcel that is positioned at the start of the
// data sent by the java layer.
// @param[out] reply Parcel to hold the reply data. Cannot be null.
// @return OK if the call was successful.
virtual status_t invoke(const Parcel& request, Parcel *reply) = 0;
// The Client in the MetadataPlayerService calls this method on
// the native player to retrieve all or a subset of metadata.
//
// @param ids SortedList of metadata ID to be fetch. If empty, all
// the known metadata should be returned.
// @param[inout] records Parcel where the player appends its metadata.
// @return OK if the call was successful.
virtual status_t getMetadata(const media::Metadata::Filter& ids,
Parcel *records) {
return INVALID_OPERATION;
};
void setNotifyCallback(
void* cookie, notify_callback_f notifyFunc) {
Mutex::Autolock autoLock(mNotifyLock);
mCookie = cookie; mNotify = notifyFunc;
}
void sendEvent(int msg, int ext1=0, int ext2=0,
const Parcel *obj=NULL) {
Mutex::Autolock autoLock(mNotifyLock);
if (mNotify) mNotify(mCookie, msg, ext1, ext2, obj);
}
virtual status_t dump(int fd, const Vector<String16> &args) const {
return INVALID_OPERATION;
}
private:
friend class MediaPlayerService;
Mutex mNotifyLock;
void* mCookie;
notify_callback_f mNotify;
};
// Implement this class for media players that use the AudioFlinger software mixer
class MediaPlayerInterface : public MediaPlayerBase
{
public:
virtual ~MediaPlayerInterface() { }
virtual bool hardwareOutput() { return false; }
virtual void setAudioSink(const sp<AudioSink>& audioSink) { mAudioSink = audioSink; }
protected:
sp<AudioSink> mAudioSink;
};
// Implement this class for media players that output audio directly to hardware
class MediaPlayerHWInterface : public MediaPlayerBase
{
public:
virtual ~MediaPlayerHWInterface() {}
virtual bool hardwareOutput() { return true; }
virtual status_t setVolume(float leftVolume, float rightVolume) = 0;
virtual status_t setAudioStreamType(int streamType) = 0;
};
}; // namespace android
#endif // __cplusplus
#endif // ANDROID_MEDIAPLAYERINTERFACE_H
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