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//=============================================================================
// AL
// Audio Utility Library
// $Id:$
//
// Copyright (C) 2002-2006 by Werner Schweer and others
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//=============================================================================
#include "dsp.h"
#include "config.h"
namespace AL {
Dsp* dsp;
#ifdef __i386__
//---------------------------------------------------------
// DspSSE86
//---------------------------------------------------------
extern "C" {
extern float x86_sse_compute_peak(float*, unsigned, float);
extern void x86_sse_apply_gain_to_buffer(float*, unsigned, float);
extern void x86_sse_mix_buffers_with_gain(float*, float*, unsigned, float);
extern void x86_sse_mix_buffers_no_gain(float*, float*, unsigned);
};
class DspSSE86 : public Dsp {
public:
DspSSE86() {}
virtual ~DspSSE86() {}
virtual float peak(float* buf, unsigned n, float current) {
if ( ((intptr_t)buf % 16) != 0) {
fprintf(stderr, "peak(): buffer unaligned! (%p)\n", buf);
return Dsp::peak(buf, n, current);
}
return x86_sse_compute_peak(buf, n, current);
}
virtual void applyGainToBuffer(float* buf, unsigned n, float gain) {
if ( ((intptr_t)buf % 16) != 0) {
fprintf(stderr, "applyGainToBuffer(): buffer unaligned! (%p)\n", buf);
Dsp::applyGainToBuffer(buf, n, gain);
}
else
x86_sse_apply_gain_to_buffer(buf, n, gain);
}
virtual void mixWithGain(float* dst, float* src, unsigned n, float gain) {
if ( ((intptr_t)dst & 15) != 0)
fprintf(stderr, "mixWithGainain(): dst unaligned! (%p)\n", dst);
if (((intptr_t)dst & 15) != ((intptr_t)src & 15) ) {
fprintf(stderr, "mixWithGain(): dst & src don't have the same alignment!\n");
Dsp::mixWithGain(dst, src,n, gain);
}
else
x86_sse_mix_buffers_with_gain(dst, src, n, gain);
}
virtual void mix(float* dst, float* src, unsigned n) {
if ( ((intptr_t)dst & 15) != 0)
fprintf(stderr, "mix_buffers_no_gain(): dst unaligned! %p\n", dst);
if ( ((intptr_t)dst & 15) != ((intptr_t)src & 15) ) {
fprintf(stderr, "mix_buffers_no_gain(): dst & src don't have the same alignment!\n");
Dsp::mix(dst, src, n);
}
else
x86_sse_mix_buffers_no_gain(dst, src, n);
}
};
#endif
//---------------------------------------------------------
// initDsp
//---------------------------------------------------------
void initDsp()
{
#if defined(__i386__) && defined(USE_SSE)
unsigned long useSSE = 0;
#ifdef __x86_64__
useSSE = 1 << 25; // we know the platform has SSE
#else
asm (
"mov $1, %%eax\n"
"pushl %%ebx\n"
"cpuid\n"
"movl %%edx, %0\n"
"popl %%ebx\n"
: "=r" (useSSE)
:
: "%eax", "%ecx", "%edx", "memory");
#endif
useSSE &= (1 << 25); // bit 25 = SSE support
if (useSSE) {
printf("Using SSE optimized routines\n");
dsp = new DspSSE86();
return;
}
// fall through to not hardware optimized routines
#endif
dsp = new Dsp();
}
}
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