65b65459e6
First drop of audio framework modifications for audio effects support. - AudioTrack/AudioRecord: Added support for auxiliary effects in AudioTrack Added support for audio sessions Fixed left right channel inversion in setVolume() - IAudioFlinger: Added interface methods for effect enumeraiton and instantiation Added support for audio sessions. - IAudioTrack: Added method to attach auxiliary effect. - AudioFlinger Created new classes to control effect engines in effect library and manage effect connections to tracks or output mix: EffectModule: wrapper object controlling the effect engine implementation in the effect library. There is one EffectModule per instance of an effect in a given audio session EffectChain: group of effects associated to one audio session. There is one EffectChain per audio session. EffectChain for session 0 is for output mix effects, other chains are attached to audio tracks with same session ID. Each chain contains a variable number of EffectModules EffectHandle: implements the IEffect interface. There is one EffectHandle object for each application controlling (or using) an effect module. THe EffectModule maintians a list of EffectHandles. Added support for effect modules and effect chains creation in PlaybackThread. modified mixer thread loop to allow track volume control by effect modules and call effect processing. -AudioMixer Each track now specifies its output buffer used by mixer for accumulation Modified mixer process functions to process tracks by groups of tracks with same buffer Modified track process functions to support accumulation to auxiliary channel Change-Id: I26d5f7c9e070a89bdd383e1a659f8b7ca150379c
90 lines
2.7 KiB
C++
90 lines
2.7 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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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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/* 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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*/
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virtual status_t start() = 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 be processed, unless flush() is called.
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*/
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virtual void stop() = 0;
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/* flush a stopped track. All pending buffers are discarded.
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* This function has no effect if the track is not stoped.
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*/
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virtual void flush() = 0;
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/* mute or unmutes this track.
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* While mutted, 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 be processed, unless 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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/* get this tracks control block */
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virtual sp<IMemory> getCblk() const = 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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