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Viewing changes to noatun/noatun/library/noatunarts/StereoVolumeControl_impl.cpp

  • Committer: Bazaar Package Importer
  • Author(s): Martin Schulze
  • Date: 2003-01-22 15:00:51 UTC
  • Revision ID: james.westby@ubuntu.com-20030122150051-uihwkdoxf15mi1tn
Tags: upstream-2.2.2
Import upstream version 2.2.2

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noatun/noatun/library/noatunarts/StereoVolumeControl_impl.cpp
 
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#ifdef HAVE_CONFIG_H
 
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#include <config.h>
 
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#endif
 
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#include <artsflow.h>
 
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#include <stdsynthmodule.h>
 
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#include <flowsystem.h>
 
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#include "noatunarts.h"
 
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using namespace Arts;
 
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namespace Noatun
 
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{
 
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class StereoVolumeControl_impl : virtual public StereoVolumeControl_skel,
 
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                                 virtual public StdSynthModule
 
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{
 
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        float mPercent;
 
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public:
 
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        StereoVolumeControl_impl() : mPercent(1.0)
 
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        { }
 
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        /*attribute float scaleFactor;*/
 
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        void percent(float p) { mPercent=p; }
 
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        float percent() { return mPercent; }
 
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        void calculateBlock(unsigned long samples)
 
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        {
 
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                float *left=inleft;
 
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                float *right=inright;
 
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                float *oleft=outleft;
 
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                float *oright=outright;
 
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                register float p=mPercent;
 
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                float *end=left+samples;
 
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                while (left<end)
 
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                {
 
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                        *oleft=*left * p;
 
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                        *oright=*right * p;
 
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                        ++left;
 
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                        ++right;
 
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                        ++oleft;
 
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                        ++oright;
 
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                }
 
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        }
 
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};
 
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class StereoVolumeControlSSE_impl : virtual public Noatun::StereoVolumeControlSSE_skel,
 
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                                    virtual public StdSynthModule
 
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{
 
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        float mPercent;
 
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public:
 
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        StereoVolumeControlSSE_impl() : mPercent(1.0)
 
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        { }
 
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        /*attribute float scaleFactor;*/
 
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        void percent(float p) { mPercent=p; }
 
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        float percent() { return mPercent; }
 
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        void calculateBlock(unsigned long samples)
 
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        {
 
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#ifdef HAVE_X86_SSE
 
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                float *left=inleft;
 
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                float *right=inright;
 
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                float *oleft=outleft;
 
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                float *oright=outright;
 
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                // need to copy the data members to locals to get enough
 
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                // spare registers (malte)
 
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                long p = (long)(mPercent*100.0);
 
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                __asm__ __volatile__(
 
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                        "pushl $100                       \n"
 
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                        "fildl (%%esp)                    \n"
 
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                        "fildl %5                         \n"
 
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                        "fdivp                            \n" // percent / 100.0
 
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                        "fstps (%%esp)                    \n"
 
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                        "movss (%%esp), %%xmm1            \n"
 
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                        "shufps $0x00, %%xmm1, %%xmm1     \n" // percentage in all of xmm1
 
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                        "addl $4, %%esp                   \n"
 
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                        "pushl %4                         \n" // save sample count
 
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                        "shrl $2, %4                      \n"
 
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                        "jz .l2                           \n" // samples < 4
 
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                        "xorl %%ecx, %%ecx                \n"
 
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                        ".l1:                             \n"
 
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                        // left
 
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                        "movups (%0, %%ecx, 8), %%xmm0    \n"
 
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                        "mulps %%xmm1, %%xmm0             \n"
 
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                        "movl %2, %%eax                   \n"
 
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                        "movups %%xmm0, (%%eax, %%ecx, 8) \n"
 
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                        // right
 
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                        "movups (%1, %%ecx, 8), %%xmm0    \n"
 
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                        "mulps %%xmm1, %%xmm0             \n"
 
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                        "movl %3, %%eax                   \n"
 
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                        "movups %%xmm0, (%%eax, %%ecx, 8) \n"
 
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                        "incl %%ecx                       \n"
 
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                        "incl %%ecx                       \n"
 
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                        "decl %4                          \n"
 
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                        "jnz .l1                          \n"
 
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                        ".l2:                             \n"
 
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                        "popl %4                          \n" // restore sample count
 
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                        "andl $3, %4                      \n"
 
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                        "jz .l4                           \n"
 
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                        // calculate remaining samples for samples % 4 != 0
 
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                        "shll $1, %%ecx                   \n"
 
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                        ".l3:                             \n"
 
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                        "movss (%0, %%ecx, 4), %%xmm0     \n" // load left
 
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                        "movss (%1, %%ecx, 4), %%xmm2     \n" // load right
 
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                        "shufps $0x00, %%xmm2, %%xmm0     \n" // both channels in xmm0
 
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                        "mulps %%xmm1, %%xmm0             \n"
 
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                        "movl %2, %%eax                   \n"
 
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                        "movss %%xmm0, (%%eax, %%ecx, 4)  \n" // store left
 
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                        "shufps $0x02, %%xmm0, %%xmm0     \n"
 
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                        "movl %3, %%eax                   \n"
 
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                        "movss %%xmm0, (%%eax, %%ecx, 4)  \n" // store right
 
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                        "incl %%ecx                       \n"   
 
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                        "decl %4                          \n"
 
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                        "jnz .l3                          \n"
 
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                        ".l4:                             \n"
 
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                        "emms                             \n"
 
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                        :
 
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                        : "r" (left),     // %0
 
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                          "r" (right),    // %1
 
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                          "m" (oleft),    // %2
 
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                          "m" (oright),   // %3
 
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                          "r" (samples),  // %4
 
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                          "m" (p)         // %5
 
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                        : "eax", "ecx"
 
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                );
 
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#endif
 
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        }
 
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};
 
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REGISTER_IMPLEMENTATION(StereoVolumeControlSSE_impl);
 
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REGISTER_IMPLEMENTATION(StereoVolumeControl_impl);
 
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};
 
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