From 0a0465887db91fe96bc4a5641cc76354a8ddeaa6 Mon Sep 17 00:00:00 2001
From: Good Guy <good1.2guy@gmail.com>
Date: Sun, 27 Sep 2015 12:48:25 -0600
Subject: [PATCH] fix segv in formattools for record format ffmpeg

---
 cinelerra-5.0/cinelerra/assetedit.C   | 16 ++++++++++------
 cinelerra-5.0/cinelerra/assetedit.h   |  1 +
 cinelerra-5.0/cinelerra/formattools.C |  3 ++-
 cinelerra-5.0/guicast/thread.h        |  2 +-
 4 files changed, 14 insertions(+), 8 deletions(-)

diff --git a/cinelerra-5.0/cinelerra/assetedit.C b/cinelerra-5.0/cinelerra/assetedit.C
index c7ef9f24..5422d97e 100644
--- a/cinelerra-5.0/cinelerra/assetedit.C
+++ b/cinelerra-5.0/cinelerra/assetedit.C
@@ -796,9 +796,14 @@ DetailAssetThread::DetailAssetThread(MWindow *mwindow)
 }
 
 DetailAssetThread::~DetailAssetThread()
+{
+	stop();
+}
+
+void DetailAssetThread::stop()
 {
 	if( Thread::running() ) {
-		dwindow->lock_window("DetailAssetThread::~DetailAssetThread");
+		dwindow->lock_window("DetailAssetThread::stop");
 		dwindow->set_done(1);
 		dwindow->unlock_window();
 		Thread::join();
@@ -831,11 +836,10 @@ void DetailAssetWindow::create_objects()
 
 void DetailAssetThread::start(Asset *asset)
 {
-	if( !Thread::running() ) {
-		delete dwindow;
-		dwindow = new DetailAssetWindow(mwindow, asset);
-		Thread::start();
-	}
+	stop();
+	delete dwindow;
+	dwindow = new DetailAssetWindow(mwindow, asset);
+	Thread::start();
 }
 
 void DetailAssetThread::run()
diff --git a/cinelerra-5.0/cinelerra/assetedit.h b/cinelerra-5.0/cinelerra/assetedit.h
index 06f72e79..32199f06 100644
--- a/cinelerra-5.0/cinelerra/assetedit.h
+++ b/cinelerra-5.0/cinelerra/assetedit.h
@@ -222,6 +222,7 @@ public:
 	~DetailAssetThread();
 
 	void start(Asset *asset);
+	void stop();
 	void run();
 };
 
diff --git a/cinelerra-5.0/cinelerra/formattools.C b/cinelerra-5.0/cinelerra/formattools.C
index f90958e0..f277fde2 100644
--- a/cinelerra-5.0/cinelerra/formattools.C
+++ b/cinelerra-5.0/cinelerra/formattools.C
@@ -349,6 +349,7 @@ void FormatTools::update_driver(int driver)
 			break;
 	}
 	close_format_windows();
+	update_format();
 }
 
 void FormatTools::update_format()
@@ -392,7 +393,7 @@ void FormatTools::update_extension()
 	const char *extension = File::get_tag(asset->format);
 // split multiple extensions
 	ArrayList<const char*> extensions;
-	int len = strlen(extension);
+	int len = !extension ? -1 : strlen(extension);
 	const char *extension_ptr = extension;
 	for(int i = 0; i <= len; i++)
 	{
diff --git a/cinelerra-5.0/guicast/thread.h b/cinelerra-5.0/guicast/thread.h
index 1eb86959..1afeecb0 100644
--- a/cinelerra-5.0/guicast/thread.h
+++ b/cinelerra-5.0/guicast/thread.h
@@ -38,7 +38,6 @@ static inline int gettid() { return syscall(SYS_gettid, 0, 0, 0); }
 class Thread
 {
 	static void* entrypoint(void *parameters);
-	bool exists() { return tid != ((pthread_t)-1); }
 
 protected:
 	virtual void run() = 0;
@@ -54,6 +53,7 @@ public:
 	int enable_cancel();
 	int disable_cancel();
 	int get_cancel_enabled();
+	bool exists() { return tid != ((pthread_t)-1); }
 	bool running() { return exists() && !finished; }
 
 	int get_synchronous();
-- 
2.26.2