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[client] corrected polling logic

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Calculating the pollDelay for the next frame is impossible as the
frame rate is determined by the host application's capture API and
may wildly vary.
This commit is contained in:
Geoffrey McRae 2017-12-11 10:09:05 +11:00
parent ce278d17a7
commit 9f790ff51d
1 changed files with 5 additions and 15 deletions
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20
client/main.c
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@ -144,8 +144,6 @@ int renderThread(void * unused)
{ {
bool error = false; bool error = false;
struct KVMFRHeader header; struct KVMFRHeader header;
int pollDelay = 0;
int lateCount = 0;
volatile uint64_t * dataPos = &state.shm->dataPos; volatile uint64_t * dataPos = &state.shm->dataPos;
while(state.running) while(state.running)
@ -153,22 +151,14 @@ int renderThread(void * unused)
// if the next frame isn't aready available // if the next frame isn't aready available
if (header.dataPos == *dataPos) if (header.dataPos == *dataPos)
{ {
// wait for a frame
const uint64_t pollStart = microtime();
if (pollDelay > 0)
usleep(pollDelay);
if (header.dataPos != *dataPos)
++lateCount;
// poll until we have a new frame, or we time out // poll until we have a new frame, or we time out
while(header.dataPos == *dataPos && state.running) { while(header.dataPos == *dataPos && state.running) {
if (microtime() - pollStart > 100) const struct timespec s = {
break; .tv_sec = 0,
.tv_nsec = 1000
};
nanosleep(&s, NULL);
} }
// update the delay
pollDelay = microtime() - pollStart - 100;
} }
// we must take a copy of the header, both to let the guest advance and to // we must take a copy of the header, both to let the guest advance and to