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/*
* Copyright 2018 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.
*/
#include "Player.h"
#include "utils/logging.h"
void Player::renderAudio(float *targetData, int32_t numFrames){
const AudioProperties properties = mSource->getProperties();
if (mIsPlaying){
int64_t framesToRenderFromData = numFrames;
int64_t totalSourceFrames = mSource->getSize() / properties.channelCount;
const float *data = mSource->getData();
// Check whether we're about to reach the end of the recording
if (!mIsLooping && mReadFrameIndex + numFrames >= totalSourceFrames){
framesToRenderFromData = totalSourceFrames - mReadFrameIndex;
mIsPlaying = false;
}
for (int i = 0; i < framesToRenderFromData; ++i) {
for (int j = 0; j < properties.channelCount; ++j) {
targetData[(i*properties.channelCount)+j] = data[(mReadFrameIndex*properties.channelCount)+j];
}
// Increment and handle wraparound
if (++mReadFrameIndex >= totalSourceFrames) mReadFrameIndex = 0;
}
if (framesToRenderFromData < numFrames){
// fill the rest of the buffer with silence
renderSilence(&targetData[framesToRenderFromData], numFrames * properties.channelCount);
}
} else {
renderSilence(targetData, numFrames * properties.channelCount);
}
}
void Player::renderSilence(float *start, int32_t numSamples){
for (int i = 0; i < numSamples; ++i) {
start[i] = 0;
}
}
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