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00020 #ifndef __JackResampler__
00021 #define __JackResampler__
00022
00023 #include "ringbuffer.h"
00024 #include "types.h"
00025 #include "JackError.h"
00026
00027 namespace Jack
00028 {
00029
00030 #define DEFAULT_RB_SIZE 32768
00031 #define DEFAULT_ADAPTATIVE_SIZE 2048
00032
00033 inline float Range(float min, float max, float val)
00034 {
00035 return (val < min) ? min : ((val > max) ? max : val);
00036 }
00037
00042 class JackResampler
00043 {
00044
00045 protected:
00046
00047 jack_ringbuffer_t* fRingBuffer;
00048 double fRatio;
00049 unsigned int fRingBufferSize;
00050
00051 public:
00052
00053 JackResampler();
00054 virtual ~JackResampler();
00055
00056 virtual void Reset(unsigned int new_size);
00057
00058 virtual unsigned int ReadResample(jack_default_audio_sample_t* buffer, unsigned int frames);
00059 virtual unsigned int WriteResample(jack_default_audio_sample_t* buffer, unsigned int frames);
00060
00061 virtual unsigned int Read(jack_default_audio_sample_t* buffer, unsigned int frames);
00062 virtual unsigned int Write(jack_default_audio_sample_t* buffer, unsigned int frames);
00063
00064 virtual unsigned int ReadSpace();
00065 virtual unsigned int WriteSpace();
00066
00067 unsigned int GetError()
00068 {
00069 return (jack_ringbuffer_read_space(fRingBuffer) / sizeof(float)) - (fRingBufferSize / 2);
00070 }
00071
00072 void SetRatio(double ratio)
00073 {
00074 fRatio = Range(0.25, 4.0, ratio);
00075 }
00076
00077 double GetRatio()
00078 {
00079 return fRatio;
00080 }
00081
00082 };
00083 }
00084
00085 #endif