68 lines
1.6 KiB
C++
68 lines
1.6 KiB
C++
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#include "convolver.h"
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#include <sndfile.h>
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#include "FFTConvolver.h"
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#include "Utilities.h"
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extern "C" {
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#include "../common.h"
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}
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static fftconvolver::FFTConvolver convolver_l;
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static fftconvolver::FFTConvolver convolver_r;
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void convolver_init(const char* filename, int max_length)
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{
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SF_INFO info;
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assert(filename);
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SNDFILE* file = sf_open(filename, SFM_READ, &info);
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assert(file);
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if (info.samplerate != 44100)
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die("Impulse file \"%s\" sample rate is %d Hz. Only 44100 Hz is supported", filename, info.samplerate);
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if (info.channels != 1 && info.channels != 2)
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die("Impulse file \"%s\" contains %d channels. Only 1 or 2 is supported.", filename, info.channels);
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const size_t size = info.frames > max_length ? max_length : info.frames;
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float buffer[size*info.channels];
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size_t l = sf_readf_float(file, buffer, size);
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assert(l == size);
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if (info.channels == 1) {
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convolver_l.init(352, buffer, size);
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convolver_r.init(352, buffer, size);
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} else {
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// deinterleave
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float buffer_l[size];
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float buffer_r[size];
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unsigned int i;
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for (i=0; i<size; ++i)
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{
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buffer_l[i] = buffer[2*i+0];
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buffer_r[i] = buffer[2*i+1];
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}
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convolver_l.init(352, buffer_l, size);
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convolver_r.init(352, buffer_r, size);
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}
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debug(1, "IR initialized from \"%s\" with %d channels and %d samples", filename, info.channels, size);
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sf_close(file);
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}
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void convolver_process_l(float* data, int length)
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{
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convolver_l.process(data, data, length);
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}
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void convolver_process_r(float* data, int length)
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{
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convolver_r.process(data, data, length);
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}
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