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64 lines
1.7 KiB
64 lines
1.7 KiB
/*
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* Copyright 2021 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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#include <cstdlib>
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#include "BlipAudioSource.h"
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BlipAudioSource::BlipAudioSource()
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: mNumPendingPulseFrames(0),
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mRequestCount(0),
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mAcknowledgeCount(0)
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{
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float* waveTbl = new float[DEFAULT_WAVETABLE_LENGTH];
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WaveTableSource::genSinWave(waveTbl, DEFAULT_WAVETABLE_LENGTH);
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WaveTableSource::setWaveTable(waveTbl, DEFAULT_WAVETABLE_LENGTH);
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}
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void BlipAudioSource::trigger() {
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mRequestCount++;
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}
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int BlipAudioSource::pull(float* buffer, int numFrames, int numChans) {
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if (mRequestCount.load() > mAcknowledgeCount.load()) {
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mAcknowledgeCount++;
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mNumPendingPulseFrames = NUM_PULSE_FRAMES;
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}
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if (mNumPendingPulseFrames <= 0) {
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memset(buffer, 0, numFrames * numChans * sizeof(float));
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} else {
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WaveTableSource::pull(buffer, numFrames, numChans);
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mNumPendingPulseFrames -= numFrames;
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}
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return numFrames;
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}
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//
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// JNI
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//
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#include <jni.h>
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extern "C" {
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JNIEXPORT jlong JNICALL
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Java_com_android_cts_verifier_audio_sources_BlipAudioSourceProvider_allocNativeSource(
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JNIEnv *env, jobject thiz) {
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return (jlong)new BlipAudioSource;
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}
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} // extern "C"
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