| /* |
| * Copyright (C) 2019 The Android Open Source Project |
| * |
| * 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 OBOE_OBOE_FLOW_GRAPH_H |
| #define OBOE_OBOE_FLOW_GRAPH_H |
| |
| #include <memory> |
| #include <stdint.h> |
| #include <sys/types.h> |
| |
| #include <flowgraph/MonoToMultiConverter.h> |
| #include <flowgraph/SampleRateConverter.h> |
| #include <oboe/Definitions.h> |
| #include "AudioSourceCaller.h" |
| #include "FixedBlockWriter.h" |
| |
| namespace oboe { |
| |
| class AudioStream; |
| class AudioSourceCaller; |
| |
| /** |
| * Convert PCM channels, format and sample rate for optimal latency. |
| */ |
| class DataConversionFlowGraph : public FixedBlockProcessor { |
| public: |
| |
| DataConversionFlowGraph() |
| : mBlockWriter(*this) {} |
| |
| void setSource(const void *buffer, int32_t numFrames); |
| |
| /** Connect several modules together to convert from source to sink. |
| * This should only be called once for each instance. |
| * |
| * @param sourceFormat |
| * @param sourceChannelCount |
| * @param sinkFormat |
| * @param sinkChannelCount |
| * @return |
| */ |
| oboe::Result configure(oboe::AudioStream *sourceStream, oboe::AudioStream *sinkStream); |
| |
| int32_t read(void *buffer, int32_t numFrames, int64_t timeoutNanos); |
| |
| int32_t write(void *buffer, int32_t numFrames); |
| |
| int32_t onProcessFixedBlock(uint8_t *buffer, int32_t numBytes) override; |
| |
| DataCallbackResult getDataCallbackResult() { |
| return mCallbackResult; |
| } |
| |
| private: |
| std::unique_ptr<flowgraph::FlowGraphSourceBuffered> mSource; |
| std::unique_ptr<AudioSourceCaller> mSourceCaller; |
| std::unique_ptr<flowgraph::MonoToMultiConverter> mChannelConverter; |
| std::unique_ptr<resampler::MultiChannelResampler> mResampler; |
| std::unique_ptr<flowgraph::SampleRateConverter> mRateConverter; |
| std::unique_ptr<flowgraph::FlowGraphSink> mSink; |
| |
| FixedBlockWriter mBlockWriter; |
| DataCallbackResult mCallbackResult = DataCallbackResult::Continue; |
| AudioStream *mFilterStream = nullptr; |
| std::unique_ptr<uint8_t[]> mAppBuffer; |
| |
| int64_t mFramePosition = 0; |
| }; |
| |
| } |
| #endif //OBOE_OBOE_FLOW_GRAPH_H |