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/**
* @file
* @brief Header file for AudioResampler class
* @author Jonathan Thomas <jonathan@openshot.org>
*
* @ref License
*/
/* LICENSE
*
* Copyright (c) 2008-2019 OpenShot Studios, LLC
* <http://www.openshotstudios.com/>. This file is part of
* OpenShot Library (libopenshot), an open-source project dedicated to
* delivering high quality video editing and animation solutions to the
* world. For more information visit <http://www.openshot.org/>.
*
* OpenShot Library (libopenshot) is free software: you can redistribute it
* and/or modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* OpenShot Library (libopenshot) is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with OpenShot Library. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef OPENSHOT_RESAMPLER_H
#define OPENSHOT_RESAMPLER_H
#include "AudioBufferSource.h"
#include "Exceptions.h"
#include "JuceHeader.h"
namespace openshot {
/**
* @brief This class is used to resample audio data for many sequential frames.
*
* It maintains some data from the last call to GetResampledBuffer(), so there
* are no pops and clicks between frames.
*/
class AudioResampler {
private:
juce::AudioSampleBuffer *buffer;
juce::AudioSampleBuffer *resampled_buffer;
openshot::AudioBufferSource *buffer_source;
juce::ResamplingAudioSource *resample_source;
juce::AudioSourceChannelInfo resample_callback_buffer;
int num_of_samples;
int new_num_of_samples;
double dest_ratio;
double source_ratio;
bool isPrepared;
public:
/// Default constructor
AudioResampler();
/// Destructor
~AudioResampler();
/// @brief Sets the audio buffer and key settings
/// @param new_buffer The buffer of audio samples needing to be resampled
/// @param sample_rate The original sample rate of the buffered samples
/// @param new_sample_rate The requested sample rate you need
void SetBuffer(juce::AudioSampleBuffer *new_buffer, double sample_rate, double new_sample_rate);
/// @brief Sets the audio buffer and key settings
/// @param new_buffer The buffer of audio samples needing to be resampled
/// @param ratio The multiplier that needs to be applied to the sample rate (this is how resampling happens)
void SetBuffer(juce::AudioSampleBuffer *new_buffer, double ratio);
/// Get the resampled audio buffer
juce::AudioSampleBuffer* GetResampledBuffer();
};
}
#endif
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