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/***
Olive - Non-Linear Video Editor
Copyright (C) 2019 Olive Team
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
***/
#ifndef SAMPLEBUFFER_H
#define SAMPLEBUFFER_H
#include <memory>
#include "render/audioparams.h"
OLIVE_NAMESPACE_ENTER
class SampleBuffer;
using SampleBufferPtr = std::shared_ptr<SampleBuffer>;
/**
* @brief A buffer of audio samples
*
* Audio samples in this structure are always stored in PLANAR (separated by channel). This is done to simplify audio
* rendering code. This replaces the old system of using QByteArrays (containing packed audio) and while SampleBuffer
* replaces many of those in the rendering/processing side of things, QByteArrays are currently still in use for
* playback, including reading to and from the cache.
*/
class SampleBuffer
{
public:
SampleBuffer();
virtual ~SampleBuffer();
static SampleBufferPtr Create();
static SampleBufferPtr CreateAllocated(const AudioParams& audio_params, int samples_per_channel);
static SampleBufferPtr CreateFromPackedData(const AudioParams& audio_params, const QByteArray& bytes);
DISABLE_COPY_MOVE(SampleBuffer)
const AudioParams& audio_params() const;
void set_audio_params(const AudioParams& params);
const int &sample_count() const;
void set_sample_count(const int &sample_count);
float** data();
const float** const_data() const;
float* channel_data(int channel);
bool is_allocated() const;
void allocate();
void destroy();
void reverse();
void speed(double speed);
void transform_volume(float f);
void transform_volume_for_channel(int channel, float volume);
void transform_volume_for_sample(int sample_index, float volume);
void transform_volume_for_sample_on_channel(int sample_index, int channel, float volume);
void fill(const float& f);
void fill(const float& f, int start_sample, int end_sample);
void set(const float** data, int sample_offset, int sample_length);
void set(const float** data, int sample_length);
QByteArray toPackedData() const;
private:
static void allocate_sample_buffer(float*** data, int nb_channels, int nb_samples);
static void destroy_sample_buffer(float*** data, int nb_channels);
AudioParams audio_params_;
int sample_count_per_channel_;
float** data_;
};
OLIVE_NAMESPACE_EXIT
Q_DECLARE_METATYPE(OLIVE_NAMESPACE::SampleBufferPtr)
#endif // SAMPLEBUFFER_H
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