michael@0: /*
michael@0:  * Copyright (C) 2007 The Android Open Source Project
michael@0:  *
michael@0:  * Licensed under the Apache License, Version 2.0 (the "License");
michael@0:  * you may not use this file except in compliance with the License.
michael@0:  * You may obtain a copy of the License at
michael@0:  *
michael@0:  *      http://www.apache.org/licenses/LICENSE-2.0
michael@0:  *
michael@0:  * Unless required by applicable law or agreed to in writing, software
michael@0:  * distributed under the License is distributed on an "AS IS" BASIS,
michael@0:  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
michael@0:  * See the License for the specific language governing permissions and
michael@0:  * limitations under the License.
michael@0:  */
michael@0: 
michael@0: #ifndef ANDROID_IAUDIOTRACK_H
michael@0: #define ANDROID_IAUDIOTRACK_H
michael@0: 
michael@0: #include <stdint.h>
michael@0: #include <sys/types.h>
michael@0: 
michael@0: #include <utils/RefBase.h>
michael@0: #include <utils/Errors.h>
michael@0: #include <binder/IInterface.h>
michael@0: #include <binder/IMemory.h>
michael@0: 
michael@0: 
michael@0: namespace android {
michael@0: 
michael@0: // ----------------------------------------------------------------------------
michael@0: 
michael@0: class IAudioTrack : public IInterface
michael@0: {
michael@0: public: 
michael@0:     DECLARE_META_INTERFACE(AudioTrack);
michael@0: 
michael@0:     /* After it's created the track is not active. Call start() to
michael@0:      * make it active. If set, the callback will start being called.
michael@0:      */
michael@0:     virtual status_t    start() = 0;
michael@0: 
michael@0:     /* Stop a track. If set, the callback will cease being called and
michael@0:      * obtainBuffer will return an error. Buffers that are already released 
michael@0:      * will be processed, unless flush() is called.
michael@0:      */
michael@0:     virtual void        stop() = 0;
michael@0: 
michael@0:     /* flush a stopped track. All pending buffers are discarded.
michael@0:      * This function has no effect if the track is not stoped.
michael@0:      */
michael@0:     virtual void        flush() = 0;
michael@0: 
michael@0:     /* mute or unmutes this track.
michael@0:      * While mutted, the callback, if set, is still called.
michael@0:      */
michael@0:     virtual void        mute(bool) = 0;
michael@0:     
michael@0:     /* Pause a track. If set, the callback will cease being called and
michael@0:      * obtainBuffer will return an error. Buffers that are already released 
michael@0:      * will be processed, unless flush() is called.
michael@0:      */
michael@0:     virtual void        pause() = 0;
michael@0: 
michael@0:     /* Attach track auxiliary output to specified effect. Use effectId = 0
michael@0:      * to detach track from effect.
michael@0:      */
michael@0:     virtual status_t    attachAuxEffect(int effectId) = 0;
michael@0: 
michael@0:     /* get this tracks control block */
michael@0:     virtual sp<IMemory> getCblk() const = 0;    
michael@0: };
michael@0: 
michael@0: // ----------------------------------------------------------------------------
michael@0: 
michael@0: class BnAudioTrack : public BnInterface<IAudioTrack>
michael@0: {
michael@0: public:
michael@0:     virtual status_t    onTransact( uint32_t code,
michael@0:                                     const Parcel& data,
michael@0:                                     Parcel* reply,
michael@0:                                     uint32_t flags = 0);
michael@0: };
michael@0: 
michael@0: // ----------------------------------------------------------------------------
michael@0: 
michael@0: }; // namespace android
michael@0: 
michael@0: #endif // ANDROID_IAUDIOTRACK_H