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98 lines
3.9 KiB
98 lines
3.9 KiB
/*
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* Copyright (C) 2012 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_AUDIO_FAST_MIXER_STATE_H
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#define ANDROID_AUDIO_FAST_MIXER_STATE_H
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#include <audio_utils/minifloat.h>
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#include <system/audio.h>
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#include <media/AudioMixer.h>
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#include <media/ExtendedAudioBufferProvider.h>
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#include <media/nbaio/NBAIO.h>
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#include <media/nblog/NBLog.h>
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#include <vibrator/ExternalVibrationUtils.h>
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#include "FastThreadState.h"
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namespace android {
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struct FastMixerDumpState;
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class VolumeProvider {
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public:
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// The provider implementation is responsible for validating that the return value is in range.
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virtual gain_minifloat_packed_t getVolumeLR() = 0;
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protected:
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VolumeProvider() { }
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virtual ~VolumeProvider() { }
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};
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// Represents the state of a fast track
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struct FastTrack {
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FastTrack();
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/*virtual*/ ~FastTrack();
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ExtendedAudioBufferProvider* mBufferProvider; // must be NULL if inactive, or non-NULL if active
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VolumeProvider* mVolumeProvider; // optional; if NULL then full-scale
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audio_channel_mask_t mChannelMask; // AUDIO_CHANNEL_OUT_MONO or AUDIO_CHANNEL_OUT_STEREO
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audio_format_t mFormat; // track format
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int mGeneration; // increment when any field is assigned
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bool mHapticPlaybackEnabled = false; // haptic playback is enabled or not
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os::HapticScale mHapticIntensity = os::HapticScale::MUTE; // intensity of haptic data
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};
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// Represents a single state of the fast mixer
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struct FastMixerState : FastThreadState {
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FastMixerState();
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/*virtual*/ ~FastMixerState();
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// These are the minimum, maximum, and default values for maximum number of fast tracks
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static const unsigned kMinFastTracks = 2;
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static const unsigned kMaxFastTracks = 32;
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static const unsigned kDefaultFastTracks = 8;
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static unsigned sMaxFastTracks; // Configured maximum number of fast tracks
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static pthread_once_t sMaxFastTracksOnce; // Protects initializer for sMaxFastTracks
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// all pointer fields use raw pointers; objects are owned and ref-counted by the normal mixer
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FastTrack mFastTracks[kMaxFastTracks];
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int mFastTracksGen; // increment when any mFastTracks[i].mGeneration is incremented
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unsigned mTrackMask; // bit i is set if and only if mFastTracks[i] is active
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NBAIO_Sink* mOutputSink; // HAL output device, must already be negotiated
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int mOutputSinkGen; // increment when mOutputSink is assigned
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size_t mFrameCount; // number of frames per fast mix buffer
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audio_channel_mask_t mSinkChannelMask; // If not AUDIO_CHANNEL_NONE, specifies sink channel
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// mask when it cannot be directly calculated from
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// channel count
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// Extends FastThreadState::Command
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static const Command
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// The following commands also process configuration changes, and can be "or"ed:
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MIX = 0x8, // mix tracks
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WRITE = 0x10, // write to output sink
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MIX_WRITE = 0x18; // mix tracks and write to output sink
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// never returns NULL; asserts if command is invalid
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static const char *commandToString(Command command);
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// initialize sMaxFastTracks
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static void sMaxFastTracksInit();
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}; // struct FastMixerState
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} // namespace android
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#endif // ANDROID_AUDIO_FAST_MIXER_STATE_H
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