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spark: make cVideo::openDevice ignorem ultiple calls

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This commit is contained in:
Stefan Seyfried
2012-02-25 13:12:56 +01:00
parent 703c416e83
commit 26d7f46280
1 changed files with 6 additions and 0 deletions
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6
libspark/video.cpp
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@@ -140,6 +140,7 @@ cVideo::cVideo(int, void *, void *)
//outputformat = VID_OUTFMT_RGBC_SVIDEO;
scartvoltage = -1;
video_standby = 0;
fd = -1;
}
cVideo::~cVideo(void)
@@ -151,6 +152,10 @@ cVideo::~cVideo(void)
void cVideo::openDevice(void)
{
lt_debug("%s\n", __func__);
/* todo: this fd checking is racy, should be protected by a lock */
if (fd != -1) /* already open */
return;
if ((fd = open(VIDEO_DEVICE, O_RDWR)) < 0)
lt_info("%s cannot open %s: %m\n", __FUNCTION__, VIDEO_DEVICE);
fcntl(fd, F_SETFD, FD_CLOEXEC);
@@ -159,6 +164,7 @@ void cVideo::openDevice(void)
void cVideo::closeDevice(void)
{
lt_debug("%s\n", __func__);
if (fd >= 0)
close(fd);
fd = -1;