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