115 lines
3.1 KiB
C++
115 lines
3.1 KiB
C++
/***
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Olive - Non-Linear Video Editor
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Copyright (C) 2022 Olive Team
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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***/
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#ifndef SAMPLEBUFFER_H
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#define SAMPLEBUFFER_H
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#include <memory>
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#include "render/audioparams.h"
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namespace olive {
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/**
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* @brief A buffer of audio samples
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*
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* Audio samples in this structure are always stored in PLANAR (separated by channel). This is done to simplify audio
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* rendering code. This replaces the old system of using QByteArrays (containing packed audio) and while SampleBuffer
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* replaces many of those in the rendering/processing side of things, QByteArrays are currently still in use for
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* playback, including reading to and from the cache.
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*/
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class SampleBuffer
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{
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public:
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SampleBuffer();
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SampleBuffer(const AudioParams& audio_params, const rational& length);
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SampleBuffer(const AudioParams& audio_params, size_t samples_per_channel);
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const AudioParams& audio_params() const;
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void set_audio_params(const AudioParams& params);
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const size_t &sample_count() const { return sample_count_per_channel_; }
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void set_sample_count(const size_t &sample_count);
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void set_sample_count(const rational &length)
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{
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set_sample_count(audio_params_.time_to_samples(length));
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}
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float* data(int channel)
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{
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return data_[channel].data();
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}
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const float* data(int channel) const
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{
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return data_.at(channel).data();
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}
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std::vector<float *> to_raw_ptrs()
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{
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std::vector<float *> r(data_.size());
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for (size_t i=0; i<r.size(); i++) {
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r[i] = data_[i].data();
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}
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return r;
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}
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int channel_count() const { return data_.size(); }
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bool is_allocated() const { return !data_.empty(); }
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void allocate();
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void destroy();
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void reverse();
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void speed(double speed);
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void transform_volume(float f);
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void transform_volume_for_channel(int channel, float volume);
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void transform_volume_for_sample(size_t sample_index, float volume);
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void transform_volume_for_sample_on_channel(size_t sample_index, int channel, float volume);
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void clamp();
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void silence();
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void silence(size_t start_sample, size_t end_sample);
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void silence_bytes(size_t start_byte, size_t end_byte);
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void set(int channel, const float* data, size_t sample_offset, size_t sample_length);
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void set(int channel, const float* data, size_t sample_length)
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{
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set(channel, data, 0, sample_length);
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}
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private:
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void clamp_channel(int channel);
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AudioParams audio_params_;
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size_t sample_count_per_channel_;
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std::vector< std::vector<float> > data_;
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};
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}
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Q_DECLARE_METATYPE(olive::SampleBuffer)
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#endif // SAMPLEBUFFER_H
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