various: allow users to override the start and end index of image sequences

Also includes various fixes to footage property setting/signalling.

app/project/item/footage/imagestream.cpp

@@ -91,11 +91,13 @@ bool ImageStream::premultiplied_alpha() const
 void ImageStream::set_premultiplied_alpha(bool e)
 {
   premultiplied_alpha_ = e;
+
+  emit ParametersChanged();
 }
 
-const QString &ImageStream::colorspace() const
+const QString &ImageStream::colorspace(bool default_if_empty) const
 {
-  if (colorspace_.isEmpty()) {
+  if (colorspace_.isEmpty() && default_if_empty) {
     return footage()->project()->default_input_colorspace();
   } else {
     return colorspace_;
@@ -106,7 +108,7 @@ void ImageStream::set_colorspace(const QString &color)
 {
   colorspace_ = color;
 
-  emit ColorSpaceChanged();
+  emit ParametersChanged();
 }
 
 void ImageStream::ColorConfigChanged()
@@ -123,13 +125,13 @@ void ImageStream::ColorConfigChanged()
   }
 
   // Either way, the color calculation has likely changed so we signal here
-  emit ColorSpaceChanged();
+  emit ParametersChanged();
 }
 
 void ImageStream::DefaultColorSpaceChanged()
 {
   // If no colorspace is set, this stream uses the default color space and it's just changed
   if (colorspace_.isEmpty()) {
-    emit ColorSpaceChanged();
+    emit ParametersChanged();
   }
 }

app/project/item/footage/imagestream.h

@@ -43,12 +43,9 @@ public:
   bool premultiplied_alpha() const;
   void set_premultiplied_alpha(bool e);
 
-  const QString& colorspace() const;
+  const QString& colorspace(bool default_if_empty = true) const;
   void set_colorspace(const QString& color);
 
-signals:
-  void ColorSpaceChanged();
-
 protected:
   virtual void FootageSetEvent(Footage*) override;
 

app/project/item/footage/stream.cpp

@@ -107,6 +107,8 @@ const int64_t &Stream::duration() const
 void Stream::set_duration(const int64_t &duration)
 {
   duration_ = duration;
+
+  emit ParametersChanged();
 }
 
 bool Stream::enabled() const

app/project/item/footage/stream.h

@@ -115,6 +115,8 @@ protected:
 signals:
   void IndexChanged();
 
+  void ParametersChanged();
+
 private:
   Footage* footage_;
 

app/project/item/footage/videostream.cpp

@@ -27,7 +27,8 @@
 const int64_t VideoStream::kEndTimestamp = AV_NOPTS_VALUE;
 
 VideoStream::VideoStream() :
-  start_time_(0)
+  start_time_(0),
+  is_image_sequence_(false)
 {
   set_type(kVideo);
 }
@@ -57,6 +58,17 @@ const int64_t &VideoStream::start_time() const
 void VideoStream::set_start_time(const int64_t &start_time)
 {
   start_time_ = start_time;
+  emit ParametersChanged();
+}
+
+bool VideoStream::is_image_sequence() const
+{
+  return is_image_sequence_;
+}
+
+void VideoStream::set_image_sequence(bool e)
+{
+  is_image_sequence_ = e;
 }
 
 int64_t VideoStream::get_closest_timestamp_in_frame_index(const rational &time)

app/project/item/footage/videostream.h

@@ -25,6 +25,7 @@
 
 class VideoStream : public ImageStream
 {
+  Q_OBJECT
 public:
   VideoStream();
 
@@ -43,6 +44,9 @@ public:
   const int64_t& start_time() const;
   void set_start_time(const int64_t& start_time);
 
+  bool is_image_sequence() const;
+  void set_image_sequence(bool e);
+
   int64_t get_closest_timestamp_in_frame_index(const rational& time);
   int64_t get_closest_timestamp_in_frame_index(int64_t timestamp);
   void clear_frame_index();
@@ -62,6 +66,8 @@ private:
 
   QMutex index_access_lock_;
 
+  bool is_image_sequence_;
+
 };
 
 using VideoStreamPtr = std::shared_ptr<VideoStream>;