video: Add color-matrix handling to caps

gst-libs/gst/video/video.c

@@ -249,6 +249,41 @@ gst_video_format_parse_caps_interlaced (GstCaps * caps, gboolean * interlaced)
   return TRUE;
 }
 
+/**
+ * gst_video_parse_caps_color_matrix:
+ * @caps: the fixed #GstCaps to parse
+ *
+ * Extracts the color matrix used by the caps.  Possible values are
+ * "sdtv" for the standard definition color matrix (as specified in
+ * Rec. ITU-R BT.470-6) or "hdtv" for the high definition color
+ * matrix (as specified in Rec. ITU-R BT.709)
+ *
+ * Since: 0.10.29
+ *
+ * Returns: TRUE if @caps was parsed correctly.
+ */
+const char *
+gst_video_parse_caps_color_matrix (GstCaps * caps)
+{
+  GstStructure *structure;
+  const char *s;
+
+  if (!gst_caps_is_fixed (caps))
+    return NULL;
+
+  structure = gst_caps_get_structure (caps, 0);
+
+  s = gst_structure_get_string (structure, "color-matrix");
+  if (s)
+    return s;
+
+  if (gst_structure_has_name (structure, "video/x-raw-yuv")) {
+    return "sdtv";
+  }
+
+  return NULL;
+}
+
 /**
  * gst_video_format_parse_caps:
  * @caps: the #GstCaps to parse

gst-libs/gst/video/video.h

@@ -291,6 +291,7 @@ gboolean gst_video_parse_caps_framerate (GstCaps *caps,
     int *fps_n, int *fps_d);
 gboolean gst_video_parse_caps_pixel_aspect_ratio (GstCaps *caps,
     int *par_n, int *par_d);
+const char *gst_video_parse_caps_color_matrix (GstCaps * caps);
 GstCaps * gst_video_format_new_caps (GstVideoFormat format,
     int width, int height, int framerate_n, int framerate_d,
     int par_n, int par_d);