diff options
Diffstat (limited to 'noatun/library/noatunarts/StereoVolumeControl_impl.cpp')
| -rw-r--r-- | noatun/library/noatunarts/StereoVolumeControl_impl.cpp | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/noatun/library/noatunarts/StereoVolumeControl_impl.cpp b/noatun/library/noatunarts/StereoVolumeControl_impl.cpp new file mode 100644 index 00000000..425704f6 --- /dev/null +++ b/noatun/library/noatunarts/StereoVolumeControl_impl.cpp @@ -0,0 +1,181 @@ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <artsflow.h> +#include <stdsynthmodule.h> +#include <flowsystem.h> +#include "noatunarts.h" + +using namespace Arts; + +namespace Noatun +{ + +class StereoVolumeControl_impl : virtual public StereoVolumeControl_skel, + virtual public StdSynthModule +{ + float mPercent; + float level; +public: + StereoVolumeControl_impl() : mPercent(1.0), level(0.0) + { } + + /*attribute float scaleFactor;*/ + void percent(float p) { mPercent=p; } + float percent() { return mPercent; } + + void calculateBlock(unsigned long samples) + { + register float *left=inleft; + register float *right=inright; + register float *oleft=outleft; + register float *oright=outright; + + level = *right + *left; + + register float p=mPercent; + + register float *end=left+samples; + + while (left<end) + { + *oleft=*left * p; + *oright=*right * p; + + ++left; + ++right; + ++oleft; + ++oright; + } + } + + AutoSuspendState autoSuspend() + { + return (level < 0.001) ? asSuspend : asNoSuspend; + } +}; + +class StereoVolumeControlSSE_impl : virtual public Noatun::StereoVolumeControlSSE_skel, + virtual public StdSynthModule +{ + float mPercent; + float level; + +public: + StereoVolumeControlSSE_impl() : mPercent(1.0), level(0.0) + { } + + /*attribute float scaleFactor;*/ + void percent(float p) { mPercent=p; } + float percent() { return mPercent; } + + void calculateBlock(unsigned long samples) + { +#ifdef HAVE_X86_SSE + float *left=inleft; + float *right=inright; + float *oleft=outleft; + float *oright=outright; + + level = *right + *left; + + // need to copy the data members to locals to get enough + // spare registers (malte) + + long p = (long)(mPercent*100.0); + __asm__ __volatile__( + "pushl $100 \n" + "fildl (%%esp) \n" +#if defined(__GNUC__) && (__GNUC__ == 3 && __GNUC_MINOR__ >= 2) + "addl $4, %%esp \n" +#endif + "fildl %5 \n" + "fdivp \n" // percent / 100.0 +#if defined(__GNUC__) && (__GNUC__ == 3 && __GNUC_MINOR__ >= 2) + "pushl $100 \n" +#endif + "fstps (%%esp) \n" + "movss (%%esp), %%xmm1 \n" + "shufps $0x00, %%xmm1, %%xmm1 \n" // percentage in all of xmm1 + "addl $4, %%esp \n" +#if defined(__GNUC__) && (__GNUC__ == 3 && __GNUC_MINOR__ >= 2) + "subl $4, %4 \n" + "jl .l2 \n" // samples < 4 +#else + "pushl %4 \n" // save sample count + "shrl $2, %4 \n" + "jz .l2 \n" // samples < 4 +#endif + "xorl %%ecx, %%ecx \n" + + ".l1: \n" + // left + "movups (%0, %%ecx, 8), %%xmm0 \n" + "mulps %%xmm1, %%xmm0 \n" + "movl %2, %%eax \n" + "movups %%xmm0, (%%eax, %%ecx, 8) \n" + // right + "movups (%1, %%ecx, 8), %%xmm0 \n" + "mulps %%xmm1, %%xmm0 \n" + "movl %3, %%eax \n" + "movups %%xmm0, (%%eax, %%ecx, 8) \n" + + "incl %%ecx \n" + "incl %%ecx \n" +#if defined(__GNUC__) && (__GNUC__ == 3 && __GNUC_MINOR__ >= 2) + "subl $4, %4 \n" + "jge .l1 \n" + ".l2: \n" + "addl $4, %4 \n" +#else + "decl %4 \n" + "jnz .l1 \n" + ".l2: \n" + "popl %4 \n" // restore sample count + "andl $3, %4 \n" +#endif + "jz .l4 \n" + + // calculate remaining samples for samples % 4 != 0 + "shll $1, %%ecx \n" + ".l3: \n" + "movss (%0, %%ecx, 4), %%xmm0 \n" // load left + "movss (%1, %%ecx, 4), %%xmm2 \n" // load right + "shufps $0x00, %%xmm2, %%xmm0 \n" // both channels in xmm0 + "mulps %%xmm1, %%xmm0 \n" + "movl %2, %%eax \n" + "movss %%xmm0, (%%eax, %%ecx, 4) \n" // store left + "shufps $0x02, %%xmm0, %%xmm0 \n" + "movl %3, %%eax \n" + "movss %%xmm0, (%%eax, %%ecx, 4) \n" // store right + "incl %%ecx \n" + "decl %4 \n" + "jnz .l3 \n" + + ".l4: \n" + "emms \n" + : + : "r" (left), // %0 + "r" (right), // %1 + "m" (oleft), // %2 + "m" (oright), // %3 + "r" (samples), // %4 + "m" (p) // %5 + : "eax", "ecx" + ); +#endif + } + + AutoSuspendState autoSuspend() + { + return (level < 0.001) ? asSuspend : asNoSuspend; + } +}; + +REGISTER_IMPLEMENTATION(StereoVolumeControlSSE_impl); +REGISTER_IMPLEMENTATION(StereoVolumeControl_impl); + +} + |