Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdemultimedia@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 240 insertions, 0 deletions

diff --git a/mpg123_artsplugin/mpg123/decode_4to1.c b/mpg123_artsplugin/mpg123/decode_4to1.c
new file mode 100644
index 00000000..00f6b038
--- /dev/null
+++ b/mpg123_artsplugin/mpg123/decode_4to1.c
@@ -0,0 +1,240 @@
+/*
+ * Mpeg Layer-1,2,3 audio decoder
+ * ------------------------------
+ * copyright (c) 1995,1996,1997 by Michael Hipp, All rights reserved.
+ * See also 'README'
+ * version for slower machines .. decodes only every fourth sample
+ * dunno why it sounds THIS annoying (maybe we should adapt the window?)
+ * absolutely not optimized for this operation
+ */
+
+#include <stdlib.h>
+#include <math.h>
+#include <string.h>
+
+#include "mpg123.h"
+
+#define WRITE_SAMPLE(samples,sum,clip) \
+  if( (sum) > 32767.0) { *(samples) = 0x7fff; (clip)++; } \
+  else if( (sum) < -32768.0) { *(samples) = -0x8000; (clip)++; } \
+  else { *(samples) = sum; }
+
+int synth_4to1_8bit(real *bandPtr,int channel,unsigned char *samples,int *pnt)
+{
+  short samples_tmp[16];
+  short *tmp1 = samples_tmp + channel;
+  int i,ret;
+  int pnt1 = 0;
+
+  ret = synth_4to1(bandPtr,channel,(unsigned char *) samples_tmp,&pnt1);
+  samples += channel + *pnt;
+
+  for(i=0;i<8;i++) {
+    *samples = conv16to8[*tmp1>>AUSHIFT];
+    samples += 2;
+    tmp1 += 2;
+  }
+  *pnt += 16;
+
+  return ret;
+}
+
+int synth_4to1_8bit_mono(real *bandPtr,unsigned char *samples,int *pnt)
+{
+  short samples_tmp[16];
+  short *tmp1 = samples_tmp;
+  int i,ret;
+  int pnt1 = 0;
+
+  ret = synth_4to1(bandPtr,0,(unsigned char *) samples_tmp,&pnt1);
+  samples += *pnt;
+
+  for(i=0;i<8;i++) {
+    *samples++ = conv16to8[*tmp1>>AUSHIFT];
+    tmp1 += 2;
+  }
+  *pnt += 8;
+
+  return ret;
+}
+
+
+int synth_4to1_8bit_mono2stereo(real *bandPtr,unsigned char *samples,int *pnt)
+{
+  short samples_tmp[16];
+  short *tmp1 = samples_tmp;
+  int i,ret;
+  int pnt1 = 0;
+
+  ret = synth_4to1(bandPtr,0,(unsigned char *) samples_tmp,&pnt1);
+  samples += *pnt;
+
+  for(i=0;i<8;i++) {
+    *samples++ = conv16to8[*tmp1>>AUSHIFT];
+    *samples++ = conv16to8[*tmp1>>AUSHIFT];
+    tmp1 += 2;
+  }
+  *pnt += 16;
+
+  return ret;
+}
+
+int synth_4to1_mono(real *bandPtr,unsigned char *samples,int *pnt)
+{
+  short samples_tmp[16];
+  short *tmp1 = samples_tmp;
+  int i,ret;
+  int pnt1 = 0;
+
+  ret = synth_4to1(bandPtr,0,(unsigned char *) samples_tmp,&pnt1);
+  samples += *pnt;
+
+  for(i=0;i<8;i++) {
+    *( (short *)samples) = *tmp1;
+    samples += 2;
+    tmp1 += 2;
+  }
+  *pnt += 16;
+
+  return ret;
+}
+
+int synth_4to1_mono2stereo(real *bandPtr,unsigned char *samples,int *pnt)
+{
+  int i,ret;
+
+  ret = synth_4to1(bandPtr,0,samples,pnt);
+  samples = samples + *pnt - 32;
+
+  for(i=0;i<8;i++) {
+    ((short *)samples)[1] = ((short *)samples)[0];
+    samples+=4;
+  }
+
+  return ret;
+}
+
+int synth_4to1(real *bandPtr,int channel,unsigned char *out,int *pnt)
+{
+  static real buffs[2][2][0x110];
+  static const int step = 2;
+  static int bo = 1;
+  short *samples = (short *) (out + *pnt);
+
+  real *b0,(*buf)[0x110];
+  int clip = 0; 
+  int bo1;
+
+#ifndef NO_EQUALIZER
+  if(param.enable_equalizer)
+    do_equalizer(bandPtr,channel);
+#endif
+
+  if(!channel) {
+    bo--;
+    bo &= 0xf;
+    buf = buffs[0];
+  }
+  else {
+    samples++;
+    buf = buffs[1];
+  }
+
+  if(bo & 0x1) {
+    b0 = buf[0];
+    bo1 = bo;
+    dct64(buf[1]+((bo+1)&0xf),buf[0]+bo,bandPtr);
+  }
+  else {
+    b0 = buf[1];
+    bo1 = bo+1;
+    dct64(buf[0]+bo,buf[1]+bo+1,bandPtr);
+  }
+
+  {
+    register int j;
+    real *window = decwin + 16 - bo1;
+
+    for (j=4;j;j--,b0+=0x30,window+=0x70)
+    {
+      real sum;
+      sum  = *window++ * *b0++;
+      sum -= *window++ * *b0++;
+      sum += *window++ * *b0++;
+      sum -= *window++ * *b0++;
+      sum += *window++ * *b0++;
+      sum -= *window++ * *b0++;
+      sum += *window++ * *b0++;
+      sum -= *window++ * *b0++;
+      sum += *window++ * *b0++;
+      sum -= *window++ * *b0++;
+      sum += *window++ * *b0++;
+      sum -= *window++ * *b0++;
+      sum += *window++ * *b0++;
+      sum -= *window++ * *b0++;
+      sum += *window++ * *b0++;
+      sum -= *window++ * *b0++;
+
+      WRITE_SAMPLE(samples,sum,clip); samples += step;
+#if 0
+      WRITE_SAMPLE(samples,sum,clip); samples += step;
+      WRITE_SAMPLE(samples,sum,clip); samples += step;
+      WRITE_SAMPLE(samples,sum,clip); samples += step;
+#endif
+    }
+
+    {
+      real sum;
+      sum  = window[0x0] * b0[0x0];
+      sum += window[0x2] * b0[0x2];
+      sum += window[0x4] * b0[0x4];
+      sum += window[0x6] * b0[0x6];
+      sum += window[0x8] * b0[0x8];
+      sum += window[0xA] * b0[0xA];
+      sum += window[0xC] * b0[0xC];
+      sum += window[0xE] * b0[0xE];
+      WRITE_SAMPLE(samples,sum,clip); samples += step;
+#if 0
+      WRITE_SAMPLE(samples,sum,clip); samples += step;
+      WRITE_SAMPLE(samples,sum,clip); samples += step;
+      WRITE_SAMPLE(samples,sum,clip); samples += step;
+#endif
+      b0-=0x40,window-=0x80;
+    }
+    window += bo1<<1;
+
+    for (j=3;j;j--,b0-=0x50,window-=0x70)
+    {
+      real sum;
+      sum = -*(--window) * *b0++;
+      sum -= *(--window) * *b0++;
+      sum -= *(--window) * *b0++;
+      sum -= *(--window) * *b0++;
+      sum -= *(--window) * *b0++;
+      sum -= *(--window) * *b0++;
+      sum -= *(--window) * *b0++;
+      sum -= *(--window) * *b0++;
+      sum -= *(--window) * *b0++;
+      sum -= *(--window) * *b0++;
+      sum -= *(--window) * *b0++;
+      sum -= *(--window) * *b0++;
+      sum -= *(--window) * *b0++;
+      sum -= *(--window) * *b0++;
+      sum -= *(--window) * *b0++;
+      sum -= *(--window) * *b0++;
+
+      WRITE_SAMPLE(samples,sum,clip); samples += step;
+#if 0
+      WRITE_SAMPLE(samples,sum,clip); samples += step;
+      WRITE_SAMPLE(samples,sum,clip); samples += step;
+      WRITE_SAMPLE(samples,sum,clip); samples += step;
+#endif
+    }
+  }
+  
+  *pnt += 32;
+
+  return clip;
+}
+
+