d8cf2960d0
Bring in changes to audio flinger made to support timed audio tracks and HW master volume control. Change-Id: Ide52d48809bdbed13acf35fd59b24637e35064ae Signed-off-by: John Grossman <johngro@google.com>
109 lines
3.8 KiB
C++
109 lines
3.8 KiB
C++
/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_IAUDIOTRACK_H
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#define ANDROID_IAUDIOTRACK_H
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#include <stdint.h>
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#include <sys/types.h>
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#include <utils/RefBase.h>
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#include <utils/Errors.h>
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#include <binder/IInterface.h>
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#include <binder/IMemory.h>
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#include <utils/LinearTransform.h>
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namespace android {
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// ----------------------------------------------------------------------------
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class IAudioTrack : public IInterface
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{
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public:
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DECLARE_META_INTERFACE(AudioTrack);
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/* Get this track's control block */
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virtual sp<IMemory> getCblk() const = 0;
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/* After it's created the track is not active. Call start() to
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* make it active. If set, the callback will start being called.
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* tid identifies the client callback thread, or 0 if not needed.
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*/
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virtual status_t start(pid_t tid) = 0;
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/* Stop a track. If set, the callback will cease being called and
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* obtainBuffer will return an error. Buffers that are already released
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* will continue to be processed, unless/until flush() is called.
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*/
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virtual void stop() = 0;
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/* Flush a stopped or paused track. All pending/released buffers are discarded.
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* This function has no effect if the track is not stopped or paused.
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*/
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virtual void flush() = 0;
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/* Mute or unmute this track.
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* While muted, the callback, if set, is still called.
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*/
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virtual void mute(bool) = 0;
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/* Pause a track. If set, the callback will cease being called and
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* obtainBuffer will return an error. Buffers that are already released
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* will continue to be processed, unless/until flush() is called.
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*/
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virtual void pause() = 0;
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/* Attach track auxiliary output to specified effect. Use effectId = 0
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* to detach track from effect.
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*/
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virtual status_t attachAuxEffect(int effectId) = 0;
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/* Allocate a shared memory buffer suitable for holding timed audio
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samples */
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virtual status_t allocateTimedBuffer(size_t size,
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sp<IMemory>* buffer) = 0;
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/* Queue a buffer obtained via allocateTimedBuffer for playback at the given
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timestamp */
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virtual status_t queueTimedBuffer(const sp<IMemory>& buffer,
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int64_t pts) = 0;
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/* Define the linear transform that will be applied to the timestamps
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given to queueTimedBuffer (which are expressed in media time).
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Target specifies whether this transform converts media time to local time
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or Tungsten time. The values for target are defined in AudioTrack.h */
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virtual status_t setMediaTimeTransform(const LinearTransform& xform,
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int target) = 0;
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};
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// ----------------------------------------------------------------------------
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class BnAudioTrack : public BnInterface<IAudioTrack>
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{
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public:
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virtual status_t onTransact( uint32_t code,
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const Parcel& data,
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Parcel* reply,
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uint32_t flags = 0);
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};
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// ----------------------------------------------------------------------------
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}; // namespace android
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#endif // ANDROID_IAUDIOTRACK_H
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