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/*
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_BUFFERED_SOURCE_NODE_H_
#define RESONANCE_AUDIO_GRAPH_BUFFERED_SOURCE_NODE_H_
#include "base/audio_buffer.h"
#include "base/constants_and_types.h"
#include "node/source_node.h"
namespace vraudio {
// Node that sets the |AudioBuffer| of a source. This class is *not*
// thread-safe and calls to this class must be synchronized with the graph
// processing.
class BufferedSourceNode : public SourceNode {
public:
// Constructor.
//
// @param source_id Source id.
// @param num_channel Number of channels in output buffers.
BufferedSourceNode(SourceId source_id, size_t num_channels,
size_t frames_per_buffer);
// Returns a mutable pointer to the internal |AudioBuffer| and sets a flag to
// process the buffer in the next graph processing iteration. Calls to this
// method must be synchronized with the audio graph processing.
//
// @return Mutable audio buffer pointer.
AudioBuffer* GetMutableAudioBufferAndSetNewBufferFlag();
protected:
// Implements SourceNode.
const AudioBuffer* AudioProcess() override;
// Source id.
const SourceId source_id_;
// Input audio buffer.
AudioBuffer input_audio_buffer_;
// Flag indicating if an new audio buffer has been set via
// |GetMutableAudioBufferAndSetNewBufferFlag|.
bool new_buffer_flag_;
};
} // namespace vraudio
#endif // RESONANCE_AUDIO_GRAPH_BUFFERED_SOURCE_NODE_H_
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