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/*
* Copyright 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_SAMPLE_RATE_CONVERTER_H
#define OBOE_SAMPLE_RATE_CONVERTER_H
#include <unistd.h>
#include <sys/types.h>
#include "FlowGraphNode.h"
#include "resampler/MultiChannelResampler.h"
namespace FLOWGRAPH_OUTER_NAMESPACE {
namespace flowgraph {
class SampleRateConverter : public FlowGraphFilter {
public:
explicit SampleRateConverter(int32_t channelCount, resampler::MultiChannelResampler &mResampler);
virtual ~SampleRateConverter() = default;
int32_t onProcess(int32_t numFrames) override;
const char *getName() override {
return "SampleRateConverter";
}
private:
// Return true if there is a sample available.
bool isInputAvailable();
// This assumes data is available. Only call after calling isInputAvailable().
const float *getNextInputFrame();
resampler::MultiChannelResampler &mResampler;
int32_t mInputCursor = 0;
int32_t mNumValidInputFrames = 0;
int64_t mInputFramePosition = 0; // monotonic counter of input frames used for pullData
};
} /* namespace flowgraph */
} /* namespace oboe */
#endif //OBOE_SAMPLE_RATE_CONVERTER_H
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