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hdmi cec reduce cpu load

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Origin commit data
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Branch: master
Commit: 91641b364f
Author: TangoCash <eric@loxat.de>
Date: 2020-06-20 (Sat, 20 Jun 2020)


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No further description and justification available within origin commit message!

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This commit was generated by Migit
This commit is contained in:
TangoCash
2020-06-20 08:38:15 +02:00
committed by vanhofen
parent 69b736f33f
commit 2e5f1c5ca5
1 changed files with 21 additions and 13 deletions
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34
libarmbox/hdmi_cec.cpp
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@@ -20,7 +20,7 @@
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/poll.h>
#include <sys/epoll.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
@@ -28,6 +28,7 @@
#include <errno.h>
#include <ctype.h>
#include <array>
#include <cstring>
#include <cstdio>
#include <cstdlib>
@@ -43,6 +44,9 @@
#define GREEN "\x1B[32m"
#define NORMAL "\x1B[0m"
#define EPOLL_WAIT_TIMEOUT (1000)
#define EPOLL_MAX_EVENTS (1)
#define hal_debug(args...) _hal_debug(HAL_DEBUG_INIT, this, args)
#define hal_info(args...) _hal_info(HAL_DEBUG_INIT, this, args)
#define hal_debug_c(args...) _hal_debug(HAL_DEBUG_INIT, NULL, args)
@@ -557,6 +561,7 @@ bool hdmi_cec::Start()
return false;
running = true;
OpenThreads::Thread::setSchedulePriority(THREAD_PRIORITY_MIN);
return (OpenThreads::Thread::start() == 0);
}
@@ -581,27 +586,30 @@ bool hdmi_cec::Stop()
void hdmi_cec::run()
{
OpenThreads::Thread::setCancelModeAsynchronous();
struct pollfd pfd;
int n;
int epollfd = epoll_create1(0);
struct epoll_event event;
event.data.fd = hdmiFd;
event.events = EPOLLIN;
pfd.fd = hdmiFd;
pfd.events = (POLLIN | POLLPRI);
epoll_ctl(epollfd, EPOLL_CTL_ADD, hdmiFd, &event);
std::array<struct epoll_event, EPOLL_MAX_EVENTS> events;
while (running)
{
if (poll(&pfd, 1, 0) > 0)
Receive(pfd.revents);
n = epoll_wait(epollfd, events.data(), EPOLL_MAX_EVENTS, EPOLL_WAIT_TIMEOUT);
for (int i = 0; i < n; ++i)
{
if (events[i].events & EPOLLIN)
Receive(events[i].events);
}
}
}
void hdmi_cec::Receive(int what)
{
if (what & POLLPRI)
{
GetCECAddressInfo();
}
if (what & POLLIN)
if (what & EPOLLIN)
{
bool hasdata = false;