mirror of https://github.com/bsnes-emu/bsnes.git
51 lines
989 B
C++
Executable File
51 lines
989 B
C++
Executable File
#ifdef NALL_DSP_INTERNAL_HPP
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struct ResampleCubic : Resampler {
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inline void setFrequency();
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inline void clear();
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inline void sample();
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ResampleCubic(DSP &dsp) : Resampler(dsp) {}
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real fraction;
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real step;
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};
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void ResampleCubic::setFrequency() {
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fraction = 0.0;
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step = dsp.settings.frequency / frequency;
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}
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void ResampleCubic::clear() {
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fraction = 0.0;
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}
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void ResampleCubic::sample() {
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while(fraction <= 1.0) {
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real channel[dsp.settings.channels];
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for(unsigned n = 0; n < dsp.settings.channels; n++) {
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real a = dsp.buffer.read(n, -3);
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real b = dsp.buffer.read(n, -2);
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real c = dsp.buffer.read(n, -1);
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real d = dsp.buffer.read(n, -0);
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real mu = fraction;
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real A = d - c - a + b;
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real B = a - b - A;
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real C = c - a;
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real D = b;
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channel[n] = A * (mu * 3) + B * (mu * 2) + C * mu + D;
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}
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dsp.write(channel);
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fraction += step;
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}
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dsp.buffer.rdoffset++;
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fraction -= 1.0;
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}
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#endif
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