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#include "chresampler.h"
#include <config.h>
#include <hugin.hpp>
#include <stdio.h>
#ifdef WITH_RESAMPLER
#if defined(USE_ZITA)
#include <zita-resampler/resampler.h>
#elif defined(USE_SRC)
#include <samplerate.h>
#else
#error "No resampler selected"
#endif
class CHResampler::Prv {
public:
#if defined(USE_ZITA)
Resampler zita;
#elif defined(USE_SRC)
SRC_STATE *state;
SRC_DATA data;
#endif
};
CHResampler::CHResampler()
{
input_fs = 44100;
output_fs = 44100;
prv = new Prv();
#if defined(SRC)
prv->state = NULL;
#endif
}
void CHResampler::setup(double input_fs, double output_fs)
{
int nchan = 1;
this->input_fs = input_fs;
this->output_fs = output_fs;
#if defined(USE_ZITA)
DEBUG(resampler, "Using zita-resampler (%d -> %d)", (int)input_fs, (int)output_fs);
int hlen = 72;
prv->zita.setup(input_fs, output_fs, nchan, hlen);
#elif defined(USE_SRC)
DEBUG(resampler, "Using libsamplerate (%d -> %d)", (int)input_fs, (int)output_fs);
int err;
prv->state = src_new(SRC_SINC_BEST_QUALITY, nchan, &err);
(void)err;
src_set_ratio(prv->state, output_fs / input_fs);
prv->data.src_ratio = output_fs / input_fs;
prv->data.end_of_input = 0;
#endif
}
CHResampler::~CHResampler()
{
#if defined(USE_ZITA)
#elif defined(USE_SRC)
if(prv->state) src_delete(prv->state);
#endif
delete prv;
}
void CHResampler::setInputSamples(float *samples, size_t count)
{
#if defined(USE_ZITA)
prv->zita.inp_data = samples;
prv->zita.inp_count = count;
#elif defined(USE_SRC)
prv->data.data_in = samples;
prv->data.input_frames = count;
#endif
}
void CHResampler::setOutputSamples(float *samples, size_t count)
{
#if defined(USE_ZITA)
prv->zita.out_data = samples;
prv->zita.out_count = count;
#elif defined(USE_SRC)
prv->data.data_out = samples;
prv->data.output_frames = count;
#endif
}
void CHResampler::process()
{
#if defined(USE_ZITA)
prv->zita.process();
#elif defined(USE_SRC)
src_process(prv->state, &prv->data);
prv->data.output_frames -= prv->data.output_frames_gen;
prv->data.data_out += prv->data.output_frames_gen;
prv->data.input_frames -= prv->data.input_frames_used;
prv->data.data_in += prv->data.input_frames_used;
#endif
}
size_t CHResampler::getInputSampleCount()
{
#if defined(USE_ZITA)
return prv->zita.inp_count;
#elif defined(USE_SRC)
return prv->data.input_frames;
#endif
}
size_t CHResampler::getOutputSampleCount()
{
#if defined(USE_ZITA)
return prv->zita.out_count;
#elif defined(USE_SRC)
return prv->data.output_frames;
#endif
}
double CHResampler::ratio()
{
return input_fs / output_fs;
}
#else
CHResampler::CHResampler() {}
CHResampler::~CHResampler() {}
void CHResampler::setup(double, double) {}
void CHResampler::setInputSamples(float *, size_t) {}
void CHResampler::setOutputSamples(float *, size_t) {}
void CHResampler::process() {}
size_t CHResampler::getInputSampleCount() { return 0; }
size_t CHResampler::getOutputSampleCount() { return 0; }
double CHResampler::ratio() { return 1; }
#endif
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