mirror of
https://github.com/hajimehoshi/ebiten.git
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65 lines
2.0 KiB
C++
Vendored
65 lines
2.0 KiB
C++
Vendored
/*
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* Copyright 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef OBOE_SAMPLE_RATE_CONVERTER_H
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#define OBOE_SAMPLE_RATE_CONVERTER_H
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#include <unistd.h>
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#include <sys/types.h>
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#include "oboe_flowgraph_FlowGraphNode_android.h"
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#include "oboe_flowgraph_resampler_MultiChannelResampler_android.h"
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namespace FLOWGRAPH_OUTER_NAMESPACE {
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namespace flowgraph {
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class SampleRateConverter : public FlowGraphFilter {
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public:
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explicit SampleRateConverter(int32_t channelCount, resampler::MultiChannelResampler &mResampler);
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virtual ~SampleRateConverter() = default;
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int32_t onProcess(int32_t numFrames) override;
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const char *getName() override {
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return "SampleRateConverter";
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}
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void reset() override;
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private:
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// Return true if there is a sample available.
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bool isInputAvailable();
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// This assumes data is available. Only call after calling isInputAvailable().
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const float *getNextInputFrame();
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resampler::MultiChannelResampler &mResampler;
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int32_t mInputCursor = 0; // offset into the input port buffer
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int32_t mNumValidInputFrames = 0; // number of valid frames currently in the input port buffer
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// We need our own callCount for upstream calls because calls occur at a different rate.
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// This means we cannot have cyclic graphs or merges that contain an SRC.
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int64_t mInputCallCount = 0;
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};
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} /* namespace flowgraph */
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} /* namespace FLOWGRAPH_OUTER_NAMESPACE */
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#endif //OBOE_SAMPLE_RATE_CONVERTER_H
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