Camera tracking: expose progress and status from camera solver into interface

Reporting progress isn't really accurate, but trying to make it more linear
can lead to spending more effort on it than having benefit. Also, changing
status in the information line helps to understand that blender isn't hang
up and solving is till working nicely.

Main changes in code:
- libmv_solveReconstruction now accepts additional parameters:

  * progress_update_callback - a function which is getting called
    from solver algorithm to report progress back to Blender.
  * callback_customdata - a user-defined context which is passing
    to progress_update_callback so progress can be updated in needed
    blender-side data structures.

  This parameters are optional.

- Added structure MovieTrackingStats which is placed in MovieTracking
  structure. It's supposed to be used for displaying information about
  different operations (currently it's only camera solver, but can be
  easily used for something else in the future) in clip editor.
  This statistics structure is getting allocated for time operator is
  working and not saving into .blend file.

- Clip Editor now displays statistics stored in MovieTrackingStats structure
  like it's done for rendering.

1 files changed, 7 insertions, 0 deletions

diff --git a/source/blender/makesdna/DNA_tracking_types.h b/source/blender/makesdna/DNA_tracking_types.h
index cbac3721ac3..88173e6cac3 100644
--- a/source/blender/makesdna/DNA_tracking_types.h
+++ b/source/blender/makesdna/DNA_tracking_types.h
@@ -165,6 +165,11 @@ typedef struct MovieTrackingReconstruction {
 	struct MovieReconstructedCamera *cameras;	/* reconstructed cameras */
 } MovieTrackingReconstruction;
 
+typedef struct MovieTrackingStats {
+	float progress;
+	char message[256];
+} MovieTrackingStats;
+
 typedef struct MovieTracking {
 	MovieTrackingSettings settings;	/* different tracking-related settings */
 	char pad2[4];
@@ -174,6 +179,8 @@ typedef struct MovieTracking {
 	MovieTrackingReconstruction reconstruction;	/* reconstruction data */
 	MovieTrackingStabilization stabilization;	/* stabilization data */
 	MovieTrackingTrack *act_track;		/* active track */
+
+	MovieTrackingStats *stats;		/* statistics displaying in clip editor */
 } MovieTracking;
 
 /* MovieTrackingCamera->units */