/*
???DVR?a?Digital?video?Recorder?for?Linux.
???
???Copyright?（C）?2001-2007?Pierre?Hebert?

???This?program?is?free?software;?you?can?redistribute?it?and/or
???modify?it?under?the?terms?of?the?GNU?Library?General?Public?License?as
???published?by?the?Free?Software?Foundation;?either?version?2?of?the
???License?or?（at?your?option）?any?later?version.

???This?program?is?distributed?in?the?hope?that?it?will?be?useful
???but?WITHOUT?ANY?WARRANTY;?without?even?the?implied?warranty?of
???MERCHANTABILITY?or?FITNESS?FOR?A?PARTICULAR?PURPOSE.??See?the?GNU
???Library?General?Public?License?for?more?details.

???You?should?have?received?a?copy?of?the?GNU?Library?General?Public
???License?along?with?this?program;?if?not?write?to?the
???Free?Software?Foundation?Inc.?59?Temple?Place?-?Suite?330
???Boston?MA?02111-1307?USA.

?*/

#include?
#include?
#include?
#include?
#include?
#include?
#include?

#include?“device_selection.h“

DeviceSelection::DeviceSelection（QWidget?*parent?const?char?*name）?:?UIDeviceSelection（parent?name）?{}

DeviceSelection::~DeviceSelection（）?{}

int?DeviceSelection::exec（）?{
??QDir?d（“/sys/class/video4linux“）;
??if（d.exists（））?{
????d.setFilter（QDir::Dirs）;

????QStringList?list=d.entryList（“video*“）;

????//?look?for?all?dir?entries?in?/sys/class/video4linux
????for（QStringList::Iterator?it=list.begin（）;?it!=list.end（）;?++it）?{
??????QString?filename=d.path（）+“/“+（*it）+“/dev“;
??????FILE?*f=fopen（filename?“r“）;
??????if（f）?{
????????int?major?minor;
????????QString?device_name?device_filename;

????????if（fscanf（f?“%d:%d“?&major?&minor）==2）?{
??????????fclose（f）;

??????????//?look?for?a?device?file?with?the?specified?major/minor?numbers
??????????device_filename=findVideoDevices（“/dev“?makedev（major?minor））;

??????????//?a?device?file?has?been?found?find?its?name
??????????if（device_filename!=““）?{
????????????filename=d.path（）+“/“+（*it）+“/name“;
????????????f=fopen（filename?“r“）;
????????????if（f）?{
??????????????char?tmp[200];
??????????????int?len=fread（tmp?1?sizeof（tmp）?f）;
??????????????tmp[len-1]=‘\0‘;?//?-1?->?remove?trailing?\n
??????????????device_name=tmp;
????????????}?else?{
??????????????device_name=QString（tr（“Unnamed?device?\““））+device_filename+“\““;
????????????}
??????????}?else?{
????????????fprintf（stderr?tr（“A?video?device?is?reported?in?/sys?（%s）?but?not?matching?file?was?found?in?/dev\n“）?filename.latin1（））;
??????????}

??????????qcb_device->insertItem（device_name）;
??????????devices_list.push_back（DeviceDesc（device_name?device_filename））;
????????}?else?{
??????????fclose（f）;
????????}
??????}
????}
??}

??if（qcb_device->count（）==0）?{
????qcb_device->insertItem（tr（““））;
????qcb_device->setEnabled（false）;
????qpb_list->setEnabled（false）;
??}

??return?UIDeviceSelection::exec（）;
}

/*?Find?the?first?char?device?file?name?matching?rdev?*/
QString?DeviceSelection::fin