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(submit/cleanup-xv-dispatch) Xext: xv: ProcXvQueryAdaptors() use local stack buffer 

Simplify sending by collecting in a local scoped buffer, so only one
WriteToClient() call is needed. This also makes further simplifications
by upcoming patches easier.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
This commit is contained in:
Enrico Weigelt, metux IT consult 2024-07-17 18:15:58 +02:00
parent 10510cd528
commit 014954c3f7
1 changed files with 26 additions and 16 deletions
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42
Xext/xvdisp.c
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@ -179,9 +179,7 @@ ProcXvQueryAdaptors(ClientPtr client)
static int
ProcXvQueryEncodings(ClientPtr client)
{
xvEncodingInfo einfo;
int totalSize;
int nameSize;
XvPortPtr pPort;
int ne;
XvEncodingPtr pe;
@ -201,6 +199,11 @@ ProcXvQueryEncodings(ClientPtr client)
pe++;
}
char buf[totalSize];
memset(buf, 0, sizeof(buf));
char *walk = buf;
xvQueryEncodingsReply rep = {
.type = X_Reply,
.sequenceNumber = client->sequence,
@ -219,26 +222,33 @@ ProcXvQueryEncodings(ClientPtr client)
ne = pPort->pAdaptor->nEncodings;
pe = pPort->pAdaptor->pEncodings;
while (ne--) {
einfo.encoding = pe->id;
einfo.name_size = nameSize = strlen(pe->name);
einfo.width = pe->width;
einfo.height = pe->height;
einfo.rate.numerator = pe->rate.numerator;
einfo.rate.denominator = pe->rate.denominator;
int nameSize;
xvEncodingInfo *einfo = (xvEncodingInfo*)walk;
einfo->encoding = pe->id;
einfo->name_size = nameSize = strlen(pe->name);
einfo->width = pe->width;
einfo->height = pe->height;
einfo->rate.numerator = pe->rate.numerator;
einfo->rate.denominator = pe->rate.denominator;
if (client->swapped) {
swapl(&einfo.encoding);
swaps(&einfo.name_size);
swaps(&einfo.width);
swaps(&einfo.height);
swapl(&einfo.rate.numerator);
swapl(&einfo.rate.denominator);
swapl(&einfo->encoding);
swaps(&einfo->name_size);
swaps(&einfo->width);
swaps(&einfo->height);
swapl(&einfo->rate.numerator);
swapl(&einfo->rate.denominator);
}
WriteToClient(client, sizeof(einfo), &einfo);
WriteToClient(client, nameSize, pe->name);
walk += sizeof(xvEncodingInfo);
memcpy(walk, pe->name, nameSize);
walk += pad_to_int32(nameSize);
pe++;
}
WriteToClient(client, sizeof(buf), buf);
return Success;
}