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/*
Copyright 2018 Google Inc. All Rights Reserved.
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 "base/audio_buffer.h"
namespace vraudio {
AudioBuffer::AudioBuffer() : num_frames_(0), source_id_(kInvalidSourceId) {}
AudioBuffer::AudioBuffer(size_t num_channels, size_t num_frames)
: num_frames_(num_frames), source_id_(kInvalidSourceId) {
InitChannelViews(num_channels);
}
// Copy assignment from AudioBuffer.
AudioBuffer& AudioBuffer::operator=(const AudioBuffer& other) {
if (this != &other) {
num_frames_ = other.num_frames_;
source_id_ = other.source_id_;
InitChannelViews(other.num_channels());
for (size_t i = 0; i < num_channels(); ++i) {
channel_views_[i] = other.channel_views_[i];
}
}
return *this;
}
AudioBuffer::AudioBuffer(AudioBuffer&& other) {
num_frames_ = other.num_frames_;
other.num_frames_ = 0;
data_ = std::move(other.data_);
data_size_ = other.data_size_;
other.data_size_ = 0;
channel_views_ = std::move(other.channel_views_);
source_id_ = other.source_id_;
other.source_id_ = kInvalidSourceId;
}
void AudioBuffer::InitChannelViews(size_t num_channels) {
const size_t num_frames_to_next_channel = FindNextAlignedArrayIndex(
num_frames_, sizeof(float), kMemoryAlignmentBytes);
data_size_ = num_channels * num_frames_to_next_channel;
data_.resize(data_size_);
channel_views_.clear();
channel_views_.reserve(num_channels);
float* itr = data_.data();
for (size_t i = 0; i < num_channels; ++i) {
ChannelView new_channel_view(itr, num_frames_);
channel_views_.push_back(new_channel_view);
itr += num_frames_to_next_channel;
}
}
} // namespace vraudio
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