[shotdetect] 07/11: Added 1006-label_xaxis_with_timecode.patch.

[Giulio Paci]

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giuliopaci-guest pushed a commit to branch master
in repository shotdetect.

commit 06749b47c7cd55c7a37502cea99ff7b139ca09d9
Author: Giulio Paci <giuliopaci at gmail.com>
Date:   Sat Aug 10 16:13:00 2013 +0200

    Added 1006-label_xaxis_with_timecode.patch.
---
 .../patches/1006-label_xaxis_with_timecode.patch   |   69 ++++++++++++++++++++
 1 file changed, 69 insertions(+)

diff --git a/debian/patches/1006-label_xaxis_with_timecode.patch b/debian/patches/1006-label_xaxis_with_timecode.patch
new file mode 100644
index 0000000..69bc466
--- /dev/null
+++ b/debian/patches/1006-label_xaxis_with_timecode.patch
@@ -0,0 +1,69 @@
+Description: label x-axis with timecode
+ - Change grid-ticks to 10-second steps
+ - Display video timecode on x-axis
+Author: Peter B. <pb at das-werkstatt.com>
+Forwarded: no
+Last-Update: 2013-08-10
+--- a/src/graph.cpp
++++ b/src/graph.cpp
+@@ -166,6 +166,13 @@
+ 
+ void graph::draw_canvas (gdImagePtr im, string title)
+ {
++  int fps = 25; // TODO: read this from video
++  int tick_length;
++  bool is_second, is_minute, is_hour;
++  int hour, minute, second, frame;
++  char time[10];
++  int frames;
++
+   gdImageString (im, gdFontGetLarge (), im->sx / 2 - (title.size () * gdFontGetLarge ()->w / 2), 10, (unsigned char *) title.c_str (), grid_color);
+   
+   //  Y-axis
+@@ -181,10 +188,42 @@
+   // X-axis
+   gdImageLine (im, xoffset, xaxis_offset, xsize - xoffset, xaxis_offset, grid_color);
+ 
+-  for (int i = xoffset; i < xsize - xoffset; i++) {
+-    if (!(i % grid_size)) {
+-	    gdImageLine (im, i, xaxis_offset - 2, i, xaxis_offset + 2, grid_color);
+-	  }
++  for (int x = xoffset; x < xsize - xoffset; x++) {
++    // Calculate video position information:
++    frames = x - xoffset + 1;
++    frame = (frames % fps);
++    is_second = !frame;
++    is_minute = false;
++    is_hour = false;
++
++    tick_length = 2;
++    if (is_second) {
++      second = (frames / fps) % 60;
++      minute = (frames / fps / 60) % 60;
++      hour = (int)(frames / fps / 60 / 60);
++
++      is_minute = !second;
++      is_hour = !minute;
++
++      // Do something special every 10th second:
++      if (!(second % 10)) {
++        tick_length = 10;
++
++        // Write video position as grid label:
++        //printf("%d:%02d:%02d.%02d\n", hour, minute, second, frame);
++        sprintf(time, "%d:%02d:%02d.%02d", hour, minute, second, frame);
++
++        gdImageString (im,
++          gdFontGetLarge(),
++          x - (strlen(time) * gdFontGetLarge()->w / 2),
++          xaxis_offset + 8,
++          (unsigned char *) time,
++          grid_color
++        );
++      }
++
++	  gdImageLine (im, x, xaxis_offset - 1, x, xaxis_offset + tick_length, grid_color);
++    }
+   }
+ }
+ 

-- 
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