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/*
Copyright (C) 2008 Paul Davis
Author: Sakari Bergen
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __ardour_export_utilities_h__
#define __ardour_export_utilities_h__
#include <samplerate.h>
#include "ardour/graph.h"
#include "ardour/types.h"
#include "ardour/ardour.h"
#include "ardour/export_format_base.h"
#include "ardour/runtime_functions.h"
namespace ARDOUR
{
/* Processors */
/* Sample rate converter */
class SampleRateConverter : public GraphSinkVertex<float, float>
{
public:
SampleRateConverter (uint32_t channels, nframes_t in_rate, nframes_t out_rate, int quality);
~SampleRateConverter ();
protected:
nframes_t process (float * data, nframes_t frames);
private:
bool active;
uint32_t channels;
nframes_t leftover_frames;
nframes_t max_leftover_frames;
nframes_t frames_in;
nframes_t frames_out;
float * data_in;
float * leftover_data;
float * data_out;
nframes_t data_out_size;
SRC_DATA src_data;
SRC_STATE* src_state;
};
/* Sample format converter */
template <typename TOut>
class SampleFormatConverter : public GraphSinkVertex<float, TOut>
{
public:
SampleFormatConverter (uint32_t channels, ExportFormatBase::DitherType type = ExportFormatBase::D_None, int data_width_ = 0);
~SampleFormatConverter ();
void set_clip_floats (bool yn) { clip_floats = yn; }
protected:
nframes_t process (float * data, nframes_t frames);
private:
uint32_t channels;
int data_width;
GDither dither;
nframes_t data_out_size;
TOut * data_out;
bool clip_floats;
};
/* Peak reader */
class PeakReader : public GraphSinkVertex<float, float>
{
public:
PeakReader (uint32_t channels) : channels (channels), peak (0) {}
~PeakReader () {}
float get_peak () { return peak; }
protected:
nframes_t process (float * data, nframes_t frames)
{
peak = compute_peak (data, channels * frames, peak);
return piped_to->write (data, frames);
}
private:
uint32_t channels;
float peak;
};
/* Normalizer */
class Normalizer : public GraphSinkVertex<float, float>
{
public:
Normalizer (uint32_t channels, float target_dB);
~Normalizer ();
void set_peak (float peak);
protected:
nframes_t process (float * data, nframes_t frames);
private:
uint32_t channels;
bool enabled;
gain_t target;
gain_t gain;
};
/* Other */
class NullSink : public GraphSink<float>
{
public:
nframes_t write (float * data, nframes_t frames) { return frames; }
};
} // namespace ARDOUR
#endif /* __ardour_export_utilities_h__ */
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