106 lines
3.5 KiB
C++
106 lines
3.5 KiB
C++
//=============================================================================
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// MuseScore
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// Music Composition & Notation
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//
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// Copyright (C) 2002-2006 Werner Schweer
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License version 2
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// as published by the Free Software Foundation and appearing in
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// the file LICENCE.GPL
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//=============================================================================
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#include "dsp.h"
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Dsp* dsp;
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#ifdef __i386__
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//---------------------------------------------------------
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// DspSSE86
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//---------------------------------------------------------
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extern "C" {
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extern float x86_sse_compute_peak(float*, unsigned, float);
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extern void x86_sse_apply_gain_to_buffer(float*, unsigned, float);
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extern void x86_sse_mix_buffers_with_gain(float*, float*, unsigned, float);
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extern void x86_sse_mix_buffers_no_gain(float*, float*, unsigned);
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};
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class DspSSE86 : public Dsp {
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public:
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DspSSE86() {}
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virtual ~DspSSE86() {}
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virtual float peak(float* buf, unsigned n, float current) {
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if ( ((intptr_t)buf % 16) != 0) {
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qDebug("peak(): buffer unaligned! (%p)\n", buf);
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return Dsp::peak(buf, n, current);
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}
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return x86_sse_compute_peak(buf, n, current);
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}
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virtual void applyGainToBuffer(float* buf, unsigned n, float gain) {
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if ( ((intptr_t)buf % 16) != 0) {
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qDebug("applyGainToBuffer(): buffer unaligned! (%p)\n", buf);
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Dsp::applyGainToBuffer(buf, n, gain);
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}
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else
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x86_sse_apply_gain_to_buffer(buf, n, gain);
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}
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virtual void mixWithGain(float* dst, float* src, unsigned n, float gain) {
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if ( ((intptr_t)dst & 15) != 0)
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qDebug("mixWithGainain(): dst unaligned! (%p)\n", dst);
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if (((intptr_t)dst & 15) != ((intptr_t)src & 15) ) {
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qDebug("mixWithGain(): dst & src don't have the same alignment!\n");
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Dsp::mixWithGain(dst, src,n, gain);
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}
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else
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x86_sse_mix_buffers_with_gain(dst, src, n, gain);
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}
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virtual void mix(float* dst, float* src, unsigned n) {
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if ( ((intptr_t)dst & 15) != 0)
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qDebug("mix_buffers_no_gain(): dst unaligned! %p\n", dst);
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if ( ((intptr_t)dst & 15) != ((intptr_t)src & 15) ) {
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qDebug("mix_buffers_no_gain(): dst & src don't have the same alignment!\n");
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Dsp::mix(dst, src, n);
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}
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else
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x86_sse_mix_buffers_no_gain(dst, src, n);
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}
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};
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#endif
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//---------------------------------------------------------
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// initDsp
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//---------------------------------------------------------
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void initDsp()
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{
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#if defined(__i386__) && defined(USE_SSE)
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unsigned long useSSE = 0;
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#ifdef __x86_64__
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useSSE = 1 << 25; // we know the platform has SSE
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#else
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asm (
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"mov $1, %%eax\n"
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"pushl %%ebx\n"
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"cpuid\n"
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"movl %%edx, %0\n"
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"popl %%ebx\n"
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: "=r" (useSSE)
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:
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: "%eax", "%ecx", "%edx", "memory");
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#endif
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useSSE &= (1 << 25); // bit 25 = SSE support
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if (useSSE) {
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qDebug("Using SSE optimized routines\n");
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dsp = new DspSSE86();
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return;
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}
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// fall through to not hardware optimized routines
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#endif
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dsp = new Dsp();
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}
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