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-rw-r--r--src/cam/main.cpp60
1 files changed, 30 insertions, 30 deletions
diff --git a/src/cam/main.cpp b/src/cam/main.cpp
index 380c14e0..a3f19d0f 100644
--- a/src/cam/main.cpp
+++ b/src/cam/main.cpp
@@ -5,6 +5,7 @@
* main.cpp - cam - The libcamera swiss army knife
*/
+#include <atomic>
#include <iomanip>
#include <iostream>
#include <signal.h>
@@ -48,6 +49,7 @@ private:
std::unique_ptr<CameraManager> cm_;
+ std::atomic_uint loopUsers_;
EventLoop loop_;
};
@@ -164,14 +166,15 @@ void CamApp::cameraRemoved(std::shared_ptr<Camera> cam)
void CamApp::captureDone()
{
- EventLoop::instance()->exit(0);
+ if (--loopUsers_ == 0)
+ EventLoop::instance()->exit(0);
}
int CamApp::run()
{
- std::unique_ptr<CameraSession> session;
int ret;
+ /* 1. List all cameras. */
if (options_.isSet(OptList)) {
std::cout << "Available cameras:" << std::endl;
@@ -182,6 +185,9 @@ int CamApp::run()
}
}
+ /* 2. Create the camera session. */
+ std::unique_ptr<CameraSession> session;
+
if (options_.isSet(OptCamera)) {
session = std::make_unique<CameraSession>(cm_.get(), options_);
if (!session->isValid()) {
@@ -195,36 +201,25 @@ int CamApp::run()
session->captureDone.connect(this, &CamApp::captureDone);
}
- if (options_.isSet(OptListControls)) {
+ /* 3. Print camera information. */
+ if (options_.isSet(OptListControls) ||
+ options_.isSet(OptListProperties) ||
+ options_.isSet(OptInfo)) {
if (!session) {
- std::cout << "Cannot list controls without a camera"
+ std::cout << "Cannot print camera information without a camera"
<< std::endl;
return -EINVAL;
}
- session->listControls();
- }
-
- if (options_.isSet(OptListProperties)) {
- if (!session) {
- std::cout << "Cannot list properties without a camera"
- << std::endl;
- return -EINVAL;
- }
-
- session->listProperties();
- }
-
- if (options_.isSet(OptInfo)) {
- if (!session) {
- std::cout << "Cannot print stream information without a camera"
- << std::endl;
- return -EINVAL;
- }
-
- session->infoConfiguration();
+ if (options_.isSet(OptListControls))
+ session->listControls();
+ if (options_.isSet(OptListProperties))
+ session->listProperties();
+ if (options_.isSet(OptInfo))
+ session->infoConfiguration();
}
+ /* 4. Start capture. */
if (options_.isSet(OptCapture)) {
if (!session) {
std::cout << "Can't capture without a camera" << std::endl;
@@ -237,12 +232,10 @@ int CamApp::run()
return ret;
}
- loop_.exec();
-
- session->stop();
- return 0;
+ loopUsers_++;
}
+ /* 5. Enable hotplug monitoring. */
if (options_.isSet(OptMonitor)) {
std::cout << "Monitoring new hotplug and unplug events" << std::endl;
std::cout << "Press Ctrl-C to interrupt" << std::endl;
@@ -250,9 +243,16 @@ int CamApp::run()
cm_->cameraAdded.connect(this, &CamApp::cameraAdded);
cm_->cameraRemoved.connect(this, &CamApp::cameraRemoved);
- loop_.exec();
+ loopUsers_++;
}
+ if (loopUsers_)
+ loop_.exec();
+
+ /* 6. Stop capture. */
+ if (options_.isSet(OptCapture))
+ session->stop();
+
return 0;
}