From d09677714e32411a91a721ce41c522507ba38cb7 Mon Sep 17 00:00:00 2001 From: schodet Date: Fri, 6 Aug 2004 18:28:27 +0000 Subject: Ajout de Video4Linux::wait() --- 2004/i/nono/src/video4linux/video4linux.cc | 23 +++++++++++++++++++++++ 2004/i/nono/src/video4linux/video4linux.h | 2 ++ 2 files changed, 25 insertions(+) (limited to '2004/i') diff --git a/2004/i/nono/src/video4linux/video4linux.cc b/2004/i/nono/src/video4linux/video4linux.cc index 7781b79..ca0a92a 100644 --- a/2004/i/nono/src/video4linux/video4linux.cc +++ b/2004/i/nono/src/video4linux/video4linux.cc @@ -31,6 +31,7 @@ #include #include #include //XXX +#include /// Constructeur. Video4Linux::Video4Linux (const char *dev, ColorSpace colorSpace, int @@ -117,6 +118,28 @@ Video4Linux::calibrate (void) std::cout << "ok" << std::endl; } +/// Attend qu'une image soit disponible, retourne true si oui. +bool +Video4Linux::wait (int timeout/*-1*/) +{ + fd_set fds; + int r; + FD_ZERO (&fds); + FD_SET (fd_, &fds); + if (timeout != -1) + { + timeval to; + to.tv_sec = timeout / 1000; + to.tv_usec = timeout % 1000 * 1000; + r = select (FD_SETSIZE, &fds, 0, 0, &to); + } + else + { + r = select (FD_SETSIZE, &fds, 0, 0, 0); + } + return r == 1; +} + /// Ouvre le périphérique. void Video4Linux::open (const char *dev) diff --git a/2004/i/nono/src/video4linux/video4linux.h b/2004/i/nono/src/video4linux/video4linux.h index 43539ca..75f2ed9 100644 --- a/2004/i/nono/src/video4linux/video4linux.h +++ b/2004/i/nono/src/video4linux/video4linux.h @@ -56,6 +56,8 @@ class Video4Linux : public ImageLoader int read (void *buf, int size) const; /// Calibre la caméra. void calibrate (void); + /// Attend qu'une image soit disponible, retourne true si oui. + bool wait (int timeout = -1); protected: /// Ouvre le périphérique. void open (const char *dev); -- cgit v1.2.3