mirror of
https://github.com/xemu-project/xemu.git
synced 2024-11-30 06:50:57 +00:00
facd0e9773
If a voice recording equipment is opened for a long time(several days) in windows guest, rate->ipos will overflow and rate->opos will never have a chance to change. It will result to a infinite loop. Signed-off-by: Peng Hao <peng.hao2@zte.com.cn> Signed-off-by: Wang Yechao <wang.yechao255@zte.com.cn> Message-id: 1500128061-20849-1-git-send-email-peng.hao2@zte.com.cn Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
118 lines
3.4 KiB
C
118 lines
3.4 KiB
C
/*
|
|
* QEMU Mixing engine
|
|
*
|
|
* Copyright (c) 2004-2005 Vassili Karpov (malc)
|
|
* Copyright (c) 1998 Fabrice Bellard
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
/*
|
|
* Processed signed long samples from ibuf to obuf.
|
|
* Return number of samples processed.
|
|
*/
|
|
void NAME (void *opaque, struct st_sample *ibuf, struct st_sample *obuf,
|
|
int *isamp, int *osamp)
|
|
{
|
|
struct rate *rate = opaque;
|
|
struct st_sample *istart, *iend;
|
|
struct st_sample *ostart, *oend;
|
|
struct st_sample ilast, icur, out;
|
|
#ifdef FLOAT_MIXENG
|
|
mixeng_real t;
|
|
#else
|
|
int64_t t;
|
|
#endif
|
|
|
|
ilast = rate->ilast;
|
|
|
|
istart = ibuf;
|
|
iend = ibuf + *isamp;
|
|
|
|
ostart = obuf;
|
|
oend = obuf + *osamp;
|
|
|
|
if (rate->opos_inc == (1ULL + UINT_MAX)) {
|
|
int i, n = *isamp > *osamp ? *osamp : *isamp;
|
|
for (i = 0; i < n; i++) {
|
|
OP (obuf[i].l, ibuf[i].l);
|
|
OP (obuf[i].r, ibuf[i].r);
|
|
}
|
|
*isamp = n;
|
|
*osamp = n;
|
|
return;
|
|
}
|
|
|
|
while (obuf < oend) {
|
|
|
|
/* Safety catch to make sure we have input samples. */
|
|
if (ibuf >= iend) {
|
|
break;
|
|
}
|
|
|
|
/* read as many input samples so that ipos > opos */
|
|
|
|
while (rate->ipos <= (rate->opos >> 32)) {
|
|
ilast = *ibuf++;
|
|
rate->ipos++;
|
|
|
|
/* if ipos overflow, there is a infinite loop */
|
|
if (rate->ipos == 0xffffffff) {
|
|
rate->ipos = 1;
|
|
rate->opos = rate->opos & 0xffffffff;
|
|
}
|
|
/* See if we finished the input buffer yet */
|
|
if (ibuf >= iend) {
|
|
goto the_end;
|
|
}
|
|
}
|
|
|
|
icur = *ibuf;
|
|
|
|
/* interpolate */
|
|
#ifdef FLOAT_MIXENG
|
|
#ifdef RECIPROCAL
|
|
t = (rate->opos & UINT_MAX) * (1.f / UINT_MAX);
|
|
#else
|
|
t = (rate->opos & UINT_MAX) / (mixeng_real) UINT_MAX;
|
|
#endif
|
|
out.l = (ilast.l * (1.0 - t)) + icur.l * t;
|
|
out.r = (ilast.r * (1.0 - t)) + icur.r * t;
|
|
#else
|
|
t = rate->opos & 0xffffffff;
|
|
out.l = (ilast.l * ((int64_t) UINT_MAX - t) + icur.l * t) >> 32;
|
|
out.r = (ilast.r * ((int64_t) UINT_MAX - t) + icur.r * t) >> 32;
|
|
#endif
|
|
|
|
/* output sample & increment position */
|
|
OP (obuf->l, out.l);
|
|
OP (obuf->r, out.r);
|
|
obuf += 1;
|
|
rate->opos += rate->opos_inc;
|
|
}
|
|
|
|
the_end:
|
|
*isamp = ibuf - istart;
|
|
*osamp = obuf - ostart;
|
|
rate->ilast = ilast;
|
|
}
|
|
|
|
#undef NAME
|
|
#undef OP
|