Remove some unnecessary using statements.

[dcpomatic.git] / src / lib / content.cc

diff --git a/src/lib/content.cc b/src/lib/content.cc
index 49ab944be54c79c3d478469ad09762a9555768fe..064bae553a4511cd7c2c52d07312e486b0f47b7c 100644 (file)
--- a/src/lib/content.cc
+++ b/src/lib/content.cc
@@ -48,8 +48,6 @@
 using std::cout;
 using std::list;
 using std::make_shared;
-using std::max;
-using std::pair;
 using std::shared_ptr;
 using std::string;
 using std::vector;
@@ -255,6 +253,8 @@ Content::set_position (shared_ptr<const Film> film, DCPTime p, bool force_emit)
 void
 Content::set_trim_start (ContentTime t)
 {
+       DCPOMATIC_ASSERT (t.get() >= 0);
+
        /* video and audio content can modify its start trim */
 
        if (video) {
@@ -278,6 +278,8 @@ Content::set_trim_start (ContentTime t)
 void
 Content::set_trim_end (ContentTime t)
 {
+       DCPOMATIC_ASSERT (t.get() >= 0);
+
        ContentChangeSignaller cc (this, ContentProperty::TRIM_END);
 
        {