ResampleSfx clean up and a bug fix on resampled stereo

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@37 d7cf8633-e32d-0410-b094-e92efae38249

diff --git a/snd_mem.c b/snd_mem.c
index be03af6ae5a14fb4a961ea86001b50d8dd137271..ca7fb36b03fa627349d4ccfabf2a252a7477c08e 100644 (file)
--- a/snd_mem.c
+++ b/snd_mem.c
@@ -36,7 +36,7 @@ void ResampleSfx (sfx_t *sfx, int inrate, int inwidth, byte *data)
        int             srcsample;
        float   stepscale;
        int             i;
-       int             sample, samplefrac, fracstep;
+       int             samplefrac, fracstep;
        sfxcache_t      *sc;
        
        sc = Cache_Check (&sfx->cache);
@@ -96,46 +96,48 @@ void ResampleSfx (sfx_t *sfx, int inrate, int inwidth, byte *data)
                fracstep = stepscale*256;
                if (sc->stereo) // LordHavoc: stereo sound support
                {
-                       for (i=0 ; i<outcount ; i+=2)
+                       if (sc->width == 2)
                        {
-                               srcsample = samplefrac >> 8;
-                               samplefrac += fracstep;
-                               srcsample <<= 1;
-                               // left
-                               if (inwidth == 2)
-                                       sample = LittleShort ( ((short *)data)[srcsample] );
-                               else
-                                       sample = (int)( (unsigned char)(data[srcsample]) - 128) << 8;
-                               if (sc->width == 2)
-                                       ((short *)sc->data)[i] = sample;
-                               else
-                                       ((signed char *)sc->data)[i] = sample >> 8;
-                               // right
-                               srcsample++;
-                               if (inwidth == 2)
-                                       sample = LittleShort ( ((short *)data)[srcsample] );
-                               else
-                                       sample = (int)( (unsigned char)(data[srcsample]) - 128) << 8;
-                               if (sc->width == 2)
-                                       ((short *)sc->data)[i+1] = sample;
-                               else
-                                       ((signed char *)sc->data)[i+1] = sample >> 8;
+                               for (i=0 ; i<outcount*2 ;)
+                               {
+                                       srcsample = samplefrac >> 8;
+                                       samplefrac += fracstep;
+                                       srcsample <<= 1;
+                                       ((short *)sc->data)[i++] = LittleShort ( ((short *)data)[srcsample++] ); // left
+                                       ((short *)sc->data)[i++] = LittleShort ( ((short *)data)[srcsample  ] ); // right
+                               }
+                       }
+                       else
+                       {
+                               for (i=0 ; i<outcount*2 ;)
+                               {
+                                       srcsample = samplefrac >> 8;
+                                       samplefrac += fracstep;
+                                       srcsample <<= 1;
+                                       ((signed char *)sc->data)[i++] = ((int)( (unsigned char)(data[srcsample++]) - 128) << 8) >> 8; // left
+                                       ((signed char *)sc->data)[i++] = ((int)( (unsigned char)(data[srcsample  ]) - 128) << 8) >> 8; // right
+                               }
                        }
                }
                else
                {
-                       for (i=0 ; i<outcount ; i++)
+                       if (sc->width == 2)
+                       {
+                               for (i=0 ; i<outcount ; i++)
+                               {
+                                       srcsample = samplefrac >> 8;
+                                       samplefrac += fracstep;
+                                       ((short *)sc->data)[i] = LittleShort ( ((short *)data)[srcsample] );
+                               }
+                       }
+                       else
                        {
-                               srcsample = samplefrac >> 8;
-                               samplefrac += fracstep;
-                               if (inwidth == 2)
-                                       sample = LittleShort ( ((short *)data)[srcsample] );
-                               else
-                                       sample = (int)( (unsigned char)(data[srcsample]) - 128) << 8;
-                               if (sc->width == 2)
-                                       ((short *)sc->data)[i] = sample;
-                               else
-                                       ((signed char *)sc->data)[i] = sample >> 8;
+                               for (i=0 ; i<outcount ; i++)
+                               {
+                                       srcsample = samplefrac >> 8;
+                                       samplefrac += fracstep;
+                                       ((signed char *)sc->data)[i] = ((int)( (unsigned char)(data[srcsample]) - 128) << 8) >> 8;
+                               }
                        }
                }
        }