+/*
+ Copyright (C) 1999-2010 Paul Davis
+
+ 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.
+
+*/
+
#include <math.h>
#include <samplerate.h>
+#include "ardour/libardour_visibility.h"
#include "ardour/types.h"
#ifndef __interpolation_h__
namespace ARDOUR {
-class Interpolation {
- protected:
- double _speed, _target_speed;
-
- // the idea is that when the speed is not 1.0, we have to
- // interpolate between samples and then we have to store where we thought we were.
- // rather than being at sample N or N+1, we were at N+0.8792922
- std::vector<double> phase;
-
-
- public:
- Interpolation () { _speed = 1.0; _target_speed = 1.0; }
- ~Interpolation () { phase.clear(); }
-
- void set_speed (double new_speed) { _speed = new_speed; _target_speed = new_speed; }
- void set_target_speed (double new_speed) { _target_speed = new_speed; }
-
- double target_speed() const { return _target_speed; }
- double speed() const { return _speed; }
-
- void add_channel_to (int /*input_buffer_size*/, int /*output_buffer_size*/) { phase.push_back (0.0); }
- void remove_channel_from () { phase.pop_back (); }
-
- void reset () {
- for (size_t i = 0; i < phase.size(); i++) {
- phase[i] = 0.0;
- }
- }
+class LIBARDOUR_API Interpolation {
+protected:
+ double _speed;
+ double _target_speed;
+
+ // the idea is that when the speed is not 1.0, we have to
+ // interpolate between samples and then we have to store where we thought we were.
+ // rather than being at sample N or N+1, we were at N+0.8792922
+ std::vector<double> phase;
+
+public:
+ Interpolation () { _speed = 1.0; _target_speed = 1.0; }
+ ~Interpolation () { phase.clear(); }
+
+ void set_speed (double new_speed) { _speed = new_speed; _target_speed = new_speed; }
+ void set_target_speed (double new_speed) { _target_speed = new_speed; }
+
+ double target_speed() const { return _target_speed; }
+ double speed() const { return _speed; }
+
+ void add_channel_to (int /*input_buffer_size*/, int /*output_buffer_size*/) { phase.push_back (0.0); }
+ void remove_channel_from () { phase.pop_back (); }
+
+ void reset () {
+ for (size_t i = 0; i < phase.size(); i++) {
+ phase[i] = 0.0;
+ }
+ }
};
-class LinearInterpolation : public Interpolation {
- protected:
-
- public:
- nframes_t interpolate (int channel, nframes_t nframes, Sample* input, Sample* output);
+class LIBARDOUR_API LinearInterpolation : public Interpolation {
+public:
+ samplecnt_t interpolate (int channel, samplecnt_t nframes, Sample* input, Sample* output);
};
-class CubicInterpolation : public Interpolation {
- protected:
- // shamelessly ripped from Steve Harris' swh-plugins (ladspa-util.h)
- static inline float cube_interp(const float fr, const float inm1, const float
- in, const float inp1, const float inp2)
- {
- return in + 0.5f * fr * (inp1 - inm1 +
- fr * (4.0f * inp1 + 2.0f * inm1 - 5.0f * in - inp2 +
- fr * (3.0f * (in - inp1) - inm1 + inp2)));
- }
-
- public:
- nframes_t interpolate (int channel, nframes_t nframes, Sample* input, Sample* output);
+class LIBARDOUR_API CubicInterpolation : public Interpolation {
+public:
+ samplecnt_t interpolate (int channel, samplecnt_t nframes, Sample* input, Sample* output);
};
-
+
+class BufferSet;
+
+class LIBARDOUR_API CubicMidiInterpolation : public Interpolation {
+public:
+ samplecnt_t distance (samplecnt_t nframes, bool roll = true);
+};
+
} // namespace ARDOUR
#endif