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56 lines
1.7 KiB
C++
56 lines
1.7 KiB
C++
//
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// AudioMixer.h
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// assignment-client/src/audio
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//
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// Created by Stephen Birarda on 8/22/13.
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// Copyright 2013 High Fidelity, Inc.
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//
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// Distributed under the Apache License, Version 2.0.
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// See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
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//
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#ifndef hifi_AudioMixer_h
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#define hifi_AudioMixer_h
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#include <AudioRingBuffer.h>
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#include <ThreadedAssignment.h>
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class PositionalAudioRingBuffer;
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class AvatarAudioRingBuffer;
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const int SAMPLE_PHASE_DELAY_AT_90 = 20;
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/// Handles assignments of type AudioMixer - mixing streams of audio and re-distributing to various clients.
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class AudioMixer : public ThreadedAssignment {
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Q_OBJECT
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public:
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AudioMixer(const QByteArray& packet);
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public slots:
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/// threaded run of assignment
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void run();
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void readPendingDatagrams();
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void sendStatsPacket();
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private:
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/// adds one buffer to the mix for a listening node
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void addBufferToMixForListeningNodeWithBuffer(PositionalAudioRingBuffer* bufferToAdd,
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AvatarAudioRingBuffer* listeningNodeBuffer);
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/// prepares and sends a mix to one Node
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void prepareMixForListeningNode(Node* node);
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// client samples capacity is larger than what will be sent to optimize mixing
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// we are MMX adding 4 samples at a time so we need client samples to have an extra 4
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int16_t _clientSamples[NETWORK_BUFFER_LENGTH_SAMPLES_STEREO + (SAMPLE_PHASE_DELAY_AT_90 * 2)];
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float _trailingSleepRatio;
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float _minAudibilityThreshold;
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float _performanceThrottlingRatio;
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int _numStatFrames;
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int _sumListeners;
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int _sumMixes;
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};
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#endif // hifi_AudioMixer_h
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