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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_IAUDIOTRACK_H
#define ANDROID_IAUDIOTRACK_H
#include <stdint.h>
#include <sys/types.h>
#include <utils/RefBase.h>
#include <utils/Errors.h>
#include <binder/IInterface.h>
#include <binder/IMemory.h>
namespace android {
// ----------------------------------------------------------------------------
class IAudioTrack : public IInterface
{
public:
DECLARE_META_INTERFACE(AudioTrack);
/* Get this track's control block */
virtual sp<IMemory> getCblk() const = 0;
/* After it's created the track is not active. Call start() to
* make it active. If set, the callback will start being called.
* tid identifies the client callback thread, or 0 if not needed.
*/
virtual status_t start(pid_t tid) = 0;
/* Stop a track. If set, the callback will cease being called and
* obtainBuffer will return an error. Buffers that are already released
* will continue to be processed, unless/until flush() is called.
*/
virtual void stop() = 0;
/* Flush a stopped or paused track. All pending/released buffers are discarded.
* This function has no effect if the track is not stopped or paused.
*/
virtual void flush() = 0;
/* Mute or unmute this track.
* While muted, the callback, if set, is still called.
*/
virtual void mute(bool) = 0;
/* Pause a track. If set, the callback will cease being called and
* obtainBuffer will return an error. Buffers that are already released
* will continue to be processed, unless/until flush() is called.
*/
virtual void pause() = 0;
/* Attach track auxiliary output to specified effect. Use effectId = 0
* to detach track from effect.
*/
virtual status_t attachAuxEffect(int effectId) = 0;
};
// ----------------------------------------------------------------------------
class BnAudioTrack : public BnInterface<IAudioTrack>
{
public:
virtual status_t onTransact( uint32_t code,
const Parcel& data,
Parcel* reply,
uint32_t flags = 0);
};
// ----------------------------------------------------------------------------
}; // namespace android
#endif // ANDROID_IAUDIOTRACK_H
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