[Scummvm-cvs-logs] CVS: scummvm/sound mixer.cpp,1.24,1.25
Pawe? Ko?odziejski
aquadran at users.sourceforge.net
Sun May 19 13:39:02 CEST 2002
Update of /cvsroot/scummvm/scummvm/sound
In directory usw-pr-cvs1:/tmp/cvs-serv16582/sound
Modified Files:
mixer.cpp
Log Message:
The Dig: stereo samples and mixer
Index: mixer.cpp
===================================================================
RCS file: /cvsroot/scummvm/scummvm/sound/mixer.cpp,v
retrieving revision 1.24
retrieving revision 1.25
diff -u -d -r1.24 -r1.25
--- mixer.cpp 19 May 2002 15:20:18 -0000 1.24
+++ mixer.cpp 19 May 2002 20:38:53 -0000 1.25
@@ -249,7 +249,18 @@
warning("Mixing stereo signed 8 bit is not supported yet ");
}
static void mix_unsigned_stereo_8(int16 *data, uint len, byte **s_ptr, uint32 *fp_pos_ptr, int fp_speed, const int16 *vol_tab) {
- warning("Mixing stereo unsigned 8 bit is not supported yet ");
+ uint32 fp_pos = *fp_pos_ptr;
+ byte *s = *s_ptr;
+ do {
+ fp_pos += fp_speed;
+ *data++ += vol_tab[*s ^ 0x80];
+ *data++ += vol_tab[*(s + 1) ^ 0x80];
+ s += (fp_pos >> 16) << 1;
+ fp_pos &= 0x0000FFFF;
+ } while (--len);
+
+ *fp_pos_ptr = fp_pos;
+ *s_ptr = s;
}
static void mix_signed_mono_16(int16 *data, uint len, byte **s_ptr, uint32 *fp_pos_ptr, int fp_speed, const int16 *vol_tab) {
uint32 fp_pos = *fp_pos_ptr;
@@ -257,8 +268,8 @@
do {
fp_pos += fp_speed;
// FIXME: missing volume table
- *data++ += (*s << 8) + *(s + 1);
- *data++ += (*s << 8) + *(s + 1);
+ *data++ += ((*s << 8) | *(s + 1));
+ *data++ += ((*s << 8) | *(s + 1));
s += (fp_pos >> 16) << 1;
fp_pos &= 0x0000FFFF;
} while (--len);
@@ -270,7 +281,19 @@
warning("Mixing mono unsigned 16 bit is not supported yet ");
}
static void mix_signed_stereo_16(int16 *data, uint len, byte **s_ptr, uint32 *fp_pos_ptr, int fp_speed, const int16 *vol_tab) {
- warning("Mixing stereo signed 16 bit is not supported yet ");
+ uint32 fp_pos = *fp_pos_ptr;
+ byte *s = *s_ptr;
+ do {
+ fp_pos += fp_speed;
+ // FIXME: missing volume table
+ *data++ += ((*s << 8) | *(s + 1));
+ *data++ += ((*(s + 2) << 8) | *(s + 3));
+ s += (fp_pos >> 16) << 2;
+ fp_pos &= 0x0000FFFF;
+ } while (--len);
+
+ *fp_pos_ptr = fp_pos;
+ *s_ptr = s;
}
static void mix_unsigned_stereo_16(int16 *data, uint len, byte **s_ptr, uint32 *fp_pos_ptr, int fp_speed, const int16 *vol_tab) {
warning("Mixing stereo unsigned 16 bit is not supported yet ");
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