diff options
Diffstat (limited to 'mpeglib/lib/splay/synth_Down.cpp')
-rw-r--r-- | mpeglib/lib/splay/synth_Down.cpp | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/mpeglib/lib/splay/synth_Down.cpp b/mpeglib/lib/splay/synth_Down.cpp new file mode 100644 index 00000000..fbe3887b --- /dev/null +++ b/mpeglib/lib/splay/synth_Down.cpp @@ -0,0 +1,231 @@ +/* + downsample implementation + Copyright (C) 2001 Martin Vogt + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU Library General Public License as published by + the Free Software Foundation. + + For more information look at the file COPYRIGHT in this package + + */ + + +#include "synthesis.h" +#include "dct64_down.cpp" + +#include <iostream> + +using namespace std; + + +void Synthesis::computebuffer_Down(REAL *fraction, + REAL buffer[2][CALCBUFFERSIZE]){ + REAL *out1,*out2; + + out1=buffer[currentcalcbuffer]+calcbufferoffset; + out2=buffer[currentcalcbuffer^1]+calcbufferoffset; + dct64_downsample(out1,out2,fraction); +} + + + +#define SAVE putraw(r); \ + dp+=16;vp+=15+(15-14) +#define OS r=*vp * *dp++ +#define XX vp+=15;r+=*vp * *dp++ +#define OP r+=*--vp * *dp++ + +inline void Synthesis::generatesingle_Down(void) +{ + int i; + register REAL r, *vp; + register const REAL *dp; + + i=32/2; + dp=filter; + vp=calcbuffer[LS][currentcalcbuffer]+calcbufferoffset; +// actual_v+actual_write_pos; + + switch (calcbufferoffset) + { + case 0:for(;i;i--,vp+=15){ + OS;XX;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP; + SAVE;}break; + case 1:for(;i;i--,vp+=15){ + OS;OP;XX;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP; + SAVE;}break; + case 2:for(;i;i--,vp+=15){ + OS;OP;OP;XX;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP; + SAVE;}break; + case 3:for(;i;i--,vp+=15){ + OS;OP;OP;OP;XX;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP; + SAVE;}break; + case 4:for(;i;i--,vp+=15){ + OS;OP;OP;OP;OP;XX;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP; + SAVE;}break; + case 5:for(;i;i--,vp+=15){ + OS;OP;OP;OP;OP;OP;XX;OP;OP;OP;OP;OP;OP;OP;OP;OP; + SAVE;}break; + case 6:for(;i;i--,vp+=15){ + OS;OP;OP;OP;OP;OP;OP;XX;OP;OP;OP;OP;OP;OP;OP;OP; + SAVE;}break; + case 7:for(;i;i--,vp+=15){ + OS;OP;OP;OP;OP;OP;OP;OP;XX;OP;OP;OP;OP;OP;OP;OP; + SAVE;}break; + case 8:for(;i;i--,vp+=15){ + OS;OP;OP;OP;OP;OP;OP;OP;OP;XX;OP;OP;OP;OP;OP;OP; + SAVE;}break; + case 9:for(;i;i--,vp+=15){ + OS;OP;OP;OP;OP;OP;OP;OP;OP;OP;XX;OP;OP;OP;OP;OP; + SAVE;}break; + case 10:for(;i;i--,vp+=15){ + OS;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;XX;OP;OP;OP;OP; + SAVE;}break; + case 11:for(;i;i--,vp+=15){ + OS;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;XX;OP;OP;OP; + SAVE;}break; + case 12:for(;i;i--,vp+=15){ + OS;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;XX;OP;OP; + SAVE;}break; + case 13:for(;i;i--,vp+=15){ + OS;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;XX;OP; + SAVE;}break; + case 14:for(;i;i--,vp+=15){ + OS;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;XX; + SAVE;}break; + case 15:for(;i;i--,vp+=31){ + OS;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP; + SAVE;}break; + } +} + +#undef OS +#undef XX +#undef OP +#undef SAVE + +#define SAVE \ + putraw(r1); \ + putraw(r2); \ + dp+=16;vp1+=15+(15-14);vp2+=15+(15-14) +#define OS r1=*vp1 * *dp; \ + r2=*vp2 * *dp++ +#define XX vp1+=15;r1+=*vp1 * *dp; \ + vp2+=15;r2+=*vp2 * *dp++ +#define OP r1+=*--vp1 * *dp; \ + r2+=*--vp2 * *dp++ + + +inline void Synthesis::generate_Down(void) +{ + int i; + REAL r1,r2; + register REAL *vp1,*vp2; + register const REAL *dp; + + dp=filter; + vp1=calcbuffer[LS][currentcalcbuffer]+calcbufferoffset; + vp2=calcbuffer[RS][currentcalcbuffer]+calcbufferoffset; +// actual_v+actual_write_pos; + + i=32/2; + switch (calcbufferoffset) + { + case 0:for(;i;i--,vp1+=15,vp2+=15){ + OS;XX;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP; + SAVE;}break; + case 1:for(;i;i--,vp1+=15,vp2+=15){ + OS;OP;XX;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP; + SAVE;}break; + case 2:for(;i;i--,vp1+=15,vp2+=15){ + OS;OP;OP;XX;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP; + SAVE;}break; + case 3:for(;i;i--,vp1+=15,vp2+=15){ + OS;OP;OP;OP;XX;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP; + SAVE;}break; + case 4:for(;i;i--,vp1+=15,vp2+=15){ + OS;OP;OP;OP;OP;XX;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP; + SAVE;}break; + case 5:for(;i;i--,vp1+=15,vp2+=15){ + OS;OP;OP;OP;OP;OP;XX;OP;OP;OP;OP;OP;OP;OP;OP;OP; + SAVE;}break; + case 6:for(;i;i--,vp1+=15,vp2+=15){ + OS;OP;OP;OP;OP;OP;OP;XX;OP;OP;OP;OP;OP;OP;OP;OP; + SAVE;}break; + case 7:for(;i;i--,vp1+=15,vp2+=15){ + OS;OP;OP;OP;OP;OP;OP;OP;XX;OP;OP;OP;OP;OP;OP;OP; + SAVE;}break; + case 8:for(;i;i--,vp1+=15,vp2+=15){ + OS;OP;OP;OP;OP;OP;OP;OP;OP;XX;OP;OP;OP;OP;OP;OP; + SAVE;}break; + case 9:for(;i;i--,vp1+=15,vp2+=15){ + OS;OP;OP;OP;OP;OP;OP;OP;OP;OP;XX;OP;OP;OP;OP;OP; + SAVE;}break; + case 10:for(;i;i--,vp1+=15,vp2+=15){ + OS;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;XX;OP;OP;OP;OP; + SAVE;}break; + case 11:for(;i;i--,vp1+=15,vp2+=15){ + OS;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;XX;OP;OP;OP; + SAVE;}break; + case 12:for(;i;i--,vp1+=15,vp2+=15){ + OS;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;XX;OP;OP; + SAVE;}break; + case 13:for(;i;i--,vp1+=15,vp2+=15){ + OS;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;XX;OP; + SAVE;}break; + case 14:for(;i;i--,vp1+=15,vp2+=15){ + OS;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;XX; + SAVE;}break; + case 15:for(;i;i--,vp1+=31,vp2+=31){ + OS;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP;OP; + SAVE;}break; + } +} + + + +void Synthesis::synth_Down(int lOutputStereo,REAL *fractionL,REAL *fractionR) { + switch(lOutputStereo) { + case true: + computebuffer_Down(fractionL,calcbuffer[LS]); + computebuffer_Down(fractionR,calcbuffer[RS]); + generate_Down(); + nextOffset(); + break; + case false: + computebuffer_Down(fractionL,calcbuffer[LS]); + generatesingle_Down(); + nextOffset(); + break; + default: + cout << "unknown lOutputStereo in Synthesis::synth_Std"<<endl; + exit(0); + } +} + + +void Synthesis::synthMP3_Down(int lOutputStereo, + REAL hout [2][SSLIMIT][SBLIMIT]) { + int ss; + switch(lOutputStereo) { + case true: + for(ss=0;ss<SSLIMIT;ss++) { + computebuffer_Down(hout[LS][ss],calcbuffer[LS]); + computebuffer_Down(hout[RS][ss],calcbuffer[RS]); + generate_Down(); + nextOffset(); + } + break; + case false: + for(ss=0;ss<SSLIMIT;ss++) { + computebuffer_Down(hout[LS][ss],calcbuffer[LS]); + generatesingle_Down(); + nextOffset(); + } + break; + default: + cout << "unknown lOutputStereo in Synthesis::synth_Std"<<endl; + exit(0); + } +} |