From 63cbb090702a73b5cce656f990152fc9fb2a5e57 Mon Sep 17 00:00:00 2001
From: Brian Matherly <pez4brian@yahoo.com>
Date: Wed, 18 Jan 2012 21:45:07 -0600
Subject: [PATCH] Add use of av_lockmgr_register in addition to the existing
 mutex for avformat services.

---
 src/modules/avformat/factory.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/src/modules/avformat/factory.c b/src/modules/avformat/factory.c
index e7fbb6c0..800261b8 100644
--- a/src/modules/avformat/factory.c
+++ b/src/modules/avformat/factory.c
@@ -69,6 +69,31 @@ void av_free( void *ptr )
 }
 #endif
 
+static int avformat_lockmgr(void **mutex, enum AVLockOp op)
+{
+   pthread_mutex_t** pmutex = (pthread_mutex_t**) mutex;
+
+   switch (op)
+   {
+   case AV_LOCK_CREATE:
+      *pmutex = (pthread_mutex_t*) malloc(sizeof(pthread_mutex_t));
+       pthread_mutex_init(*pmutex, NULL);
+       break;
+   case AV_LOCK_OBTAIN:
+       pthread_mutex_lock(*pmutex);
+       break;
+   case AV_LOCK_RELEASE:
+       pthread_mutex_unlock(*pmutex);
+       break;
+   case AV_LOCK_DESTROY:
+       pthread_mutex_destroy(*pmutex);
+       free(*pmutex);
+       break;
+   }
+
+   return 0;
+}
+
 void avformat_destroy( void *ignore )
 {
 	// Clean up
@@ -97,6 +122,7 @@ static void avformat_init( )
 	{
 		avformat_initialised = 1;
 		pthread_mutex_init( &avformat_mutex, NULL );
+		av_lockmgr_register( &avformat_lockmgr );
 		av_register_all( );
 #ifdef AVDEVICE
 		avdevice_register_all();
-- 
2.39.2