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Diffstat (limited to 'src/3rdparty/resonance-audio/resonance_audio/graph/gain_mixer_node.h')
-rw-r--r-- | src/3rdparty/resonance-audio/resonance_audio/graph/gain_mixer_node.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/src/3rdparty/resonance-audio/resonance_audio/graph/gain_mixer_node.h b/src/3rdparty/resonance-audio/resonance_audio/graph/gain_mixer_node.h new file mode 100644 index 000000000..df569ccdd --- /dev/null +++ b/src/3rdparty/resonance-audio/resonance_audio/graph/gain_mixer_node.h @@ -0,0 +1,68 @@ +/* +Copyright 2018 Google Inc. All Rights Reserved. + +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 RESONANCE_AUDIO_GRAPH_GAIN_MIXER_NODE_H_ +#define RESONANCE_AUDIO_GRAPH_GAIN_MIXER_NODE_H_ + +#include "base/audio_buffer.h" +#include "base/source_parameters.h" +#include "dsp/gain_mixer.h" +#include "graph/system_settings.h" +#include "node/processing_node.h" + +namespace vraudio { + +// Node that accepts multiple input buffers, calculates and applies a gain +// value to each buffer based upon the given |AttenuationType| and then mixes +// the results together. +class GainMixerNode : public ProcessingNode { + public: + // Constructs |GainMixerNode| with given gain calculation method. + // + // @param attenuation_type Gain attenuation type to be used. + // @param system_settings Global system settings. + // @param num_channels Number of channels. + GainMixerNode(const AttenuationType& attenuation_type, + const SystemSettings& system_settings, size_t num_channels); + + // Mute the mixer node by skipping the audio processing and outputting nullptr + // buffers. + void SetMute(bool mute_enabled); + + // Node implementation. + bool CleanUp() final; + + protected: + // Implements ProcessingNode. + const AudioBuffer* AudioProcess(const NodeInput& input) override; + + private: + // Flag indicating the mute status. + bool mute_enabled_; + + // Gain attenuation type. + const AttenuationType attenuation_type_; + + // Gain mixer. + GainMixer gain_mixer_; + + // Global system settings. + const SystemSettings& system_settings_; +}; + +} // namespace vraudio + +#endif // RESONANCE_AUDIO_GRAPH_GAIN_MIXER_NODE_H_ |