2 Copyright (C) 2008 Grame
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #ifndef __JackResampler__
21 #define __JackResampler__
23 #include "ringbuffer.h"
29 #define DEFAULT_RB_SIZE 32768
30 #define DEFAULT_ADAPTATIVE_SIZE 2048
32 inline float Range(float min
, float max
, float val
)
34 return (val
< min
) ? min
: ((val
> max
) ? max
: val
);
38 \brief Base class for RingBuffer in frames.
46 jack_ringbuffer_t
* fRingBuffer
;
47 unsigned int fRingBufferSize
;
51 JackRingBuffer(int size
= DEFAULT_RB_SIZE
);
52 virtual ~JackRingBuffer();
54 virtual void Reset(unsigned int new_size
);
57 virtual unsigned int Read(jack_default_audio_sample_t
* buffer
, unsigned int frames
);
58 virtual unsigned int Write(jack_default_audio_sample_t
* buffer
, unsigned int frames
);
61 virtual unsigned int Read(void* buffer
, unsigned int bytes
);
62 virtual unsigned int Write(void* buffer
, unsigned int bytes
);
65 virtual unsigned int ReadSpace();
66 virtual unsigned int WriteSpace();
68 unsigned int GetError()
70 return (jack_ringbuffer_read_space(fRingBuffer
) / sizeof(float)) - (fRingBufferSize
/ 2);
76 \brief Base class for Resampler.
79 class JackResampler
: public JackRingBuffer
88 JackResampler():JackRingBuffer(),fRatio(1)
90 virtual ~JackResampler()
93 virtual unsigned int ReadResample(jack_default_audio_sample_t
* buffer
, unsigned int frames
);
94 virtual unsigned int WriteResample(jack_default_audio_sample_t
* buffer
, unsigned int frames
);
96 void SetRatio(double ratio
)
98 fRatio
= Range(0.25, 4.0, ratio
);