| 1 | /* |
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| 2 | Copyright 2018 Google Inc. All Rights Reserved. |
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| 3 | |
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| 4 | Licensed under the Apache License, Version 2.0 (the "License"); |
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| 5 | you may not use this file except in compliance with the License. |
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| 6 | You may obtain a copy of the License at |
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| 7 | |
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| 8 | http://www.apache.org/licenses/LICENSE-2.0 |
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| 9 | |
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| 10 | Unless required by applicable law or agreed to in writing, software |
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| 11 | distributed under the License is distributed on an "AS-IS" BASIS, |
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| 12 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 13 | See the License for the specific language governing permissions and |
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| 14 | limitations under the License. |
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| 15 | */ |
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| 16 | |
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| 17 | #ifndef RESONANCE_AUDIO_GRAPH_BUFFERED_SOURCE_NODE_H_ |
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| 18 | #define RESONANCE_AUDIO_GRAPH_BUFFERED_SOURCE_NODE_H_ |
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| 19 | |
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| 20 | #include "base/audio_buffer.h" |
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| 21 | #include "base/constants_and_types.h" |
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| 22 | #include "node/source_node.h" |
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| 23 | |
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| 24 | namespace vraudio { |
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| 25 | |
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| 26 | // Node that sets the |AudioBuffer| of a source. This class is *not* |
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| 27 | // thread-safe and calls to this class must be synchronized with the graph |
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| 28 | // processing. |
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| 29 | class BufferedSourceNode : public SourceNode { |
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| 30 | public: |
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| 31 | // Constructor. |
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| 32 | // |
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| 33 | // @param source_id Source id. |
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| 34 | // @param num_channel Number of channels in output buffers. |
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| 35 | BufferedSourceNode(SourceId source_id, size_t num_channels, |
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| 36 | size_t frames_per_buffer); |
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| 37 | |
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| 38 | // Returns a mutable pointer to the internal |AudioBuffer| and sets a flag to |
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| 39 | // process the buffer in the next graph processing iteration. Calls to this |
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| 40 | // method must be synchronized with the audio graph processing. |
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| 41 | // |
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| 42 | // @return Mutable audio buffer pointer. |
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| 43 | AudioBuffer* GetMutableAudioBufferAndSetNewBufferFlag(); |
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| 44 | |
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| 45 | protected: |
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| 46 | // Implements SourceNode. |
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| 47 | const AudioBuffer* AudioProcess() override; |
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| 48 | |
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| 49 | // Source id. |
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| 50 | const SourceId source_id_; |
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| 51 | |
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| 52 | // Input audio buffer. |
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| 53 | AudioBuffer input_audio_buffer_; |
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| 54 | |
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| 55 | // Flag indicating if an new audio buffer has been set via |
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| 56 | // |GetMutableAudioBufferAndSetNewBufferFlag|. |
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| 57 | bool new_buffer_flag_; |
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| 58 | }; |
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| 59 | |
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| 60 | } // namespace vraudio |
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| 61 | |
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| 62 | #endif // RESONANCE_AUDIO_GRAPH_BUFFERED_SOURCE_NODE_H_ |
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| 63 | |
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