[vlc-devel] [PATCH 11/15] video_filter:deinterlace: assume the field duration from the output framerate

[Steve Lhomme]

If we don't have the field/frame history
---
 modules/video_filter/deinterlace/common.c | 6 ++++--
 modules/video_filter/deinterlace/common.h | 5 +++--
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/modules/video_filter/deinterlace/common.c b/modules/video_filter/deinterlace/common.c
index ec558d0ded..a1b68dc869 100644
--- a/modules/video_filter/deinterlace/common.c
+++ b/modules/video_filter/deinterlace/common.c
@@ -52,7 +52,7 @@ void FlushDeinterlacing(struct deinterlace_ctx *p_context)
 }
 
 mtime_t GetFieldDuration(const struct deinterlace_ctx *p_context,
-                         const picture_t *p_pic )
+                         const video_format_t *fmt, const picture_t *p_pic )
 {
     mtime_t i_field_dur = 0;
 
@@ -74,6 +74,8 @@ mtime_t GetFieldDuration(const struct deinterlace_ctx *p_context,
         /* One field took this long. */
         i_field_dur = (p_pic->date - p_context->meta[i].pi_date) / i_fields_total;
     }
+    else if (fmt->i_frame_rate_base)
+        i_field_dur = CLOCK_FREQ * fmt->i_frame_rate_base / fmt->i_frame_rate;
 
     /* Note that we default to field duration 0 if it could not be
        determined. This behaves the same as the old code - leaving the
@@ -276,7 +278,7 @@ picture_t *DoDeinterlacing( filter_t *p_filter,
 
         if( p_context->b_double_rate )
         {
-            mtime_t i_field_dur = GetFieldDuration( p_context, p_pic );
+            mtime_t i_field_dur = GetFieldDuration( p_context, &p_filter->fmt_out.video, p_pic );
             /* Processing all actually allocated output frames. */
             for( int i = 1; i < i_double_rate_alloc_end; ++i )
             {
diff --git a/modules/video_filter/deinterlace/common.h b/modules/video_filter/deinterlace/common.h
index 4f28d361e0..a8e3de430a 100644
--- a/modules/video_filter/deinterlace/common.h
+++ b/modules/video_filter/deinterlace/common.h
@@ -90,12 +90,13 @@ struct deinterlace_ctx
 #define DEINTERLACE_DST_SIZE 3
 
 /**
- * @brief Get the field duration based on the previous fields
+ * @brief Get the field duration based on the previous fields or the frame rate
+ * @param fmt output format of the deinterlacer with the frame rate
  * @param p_pic the picture which field we want the duration
  * @return the duration of the field or 0 if there's no known framerate
  */
 mtime_t GetFieldDuration( const struct deinterlace_ctx *,
-                          const picture_t *p_pic );
+                          const video_format_t *fmt, const picture_t *p_pic );
 
 /**
  * @brief Get the output video_format_t configured for the deinterlacer
-- 
2.12.1