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reduce crackling in CDDA mode

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This commit is contained in:
nehalmistry 2002-12-11 07:07:59 +00:00
parent addf074288
commit 9b51f08f82
1 changed files with 7 additions and 9 deletions

16
src/sound/cdda.cpp
View file

@ -37,7 +37,7 @@
#include <stdlib.h>
#include <stdio.h>
global struct cdrom_read_audio readdata;
local struct cdrom_read_audio readdata;
local void *bufstart;
/*----------------------------------------------------------------------------
@ -50,32 +50,30 @@ local int CDRead(Sample *sample, void *buf, int len)
static int count = 0;
int end = (int)bufstart + 2352 * 28;
++count;
readdata.addr.lba = CDtocentry[CDTrack].cdte_addr.lba + pos / 2352;
readdata.addr_format = CDROM_LBA;
readdata.nframes = 14;
if (count == 5) {
++count;
pos += len;
if (count == (end - (int)bufstart) / len / 2 + 1) {
readdata.buf = bufstart;
ioctl(CDDrive, CDROMREADAUDIO, &readdata);
} else if (count == 1) {
readdata.buf = bufstart + 2352 * 14;
ioctl(CDDrive, CDROMREADAUDIO, &readdata);
}
pos += len;
sample->User += len;
if ((int)sample->User + len <= end) {
memcpy(buf, sample->User, len);
sample->User += len;
} else {
count = 0;
memcpy(buf, sample->User, end - (int)sample->User);
memcpy(buf + (end - (int)sample->User), bufstart,
len - (end - (int)sample->User));
// sample->User = bufstart + len - (end - (int)sample->User);
sample->User = bufstart + (end - (int)sample->User);
sample->User = bufstart + len - (end - (int)sample->User);
}
return len;