BlinkenLib

@@ -263,6 +263,8 @@ int main(int argCnt, char **args)

            "     reverse movie\n"

            "  -ct <begin> <end>\n"

            "     cut movie to time span from begin (in ms) till end (in ms)\n"

+           "  -dur <duration>\n"

+           "     adapt duration (in ms) of movie\n"

            "  -d <first> <count>\n"

            "     delete frames\n"

            "  -t <width>x<height>-<channels>/<colors> <test_mode> <duration>\n"

@@ -523,6 +525,22 @@ int main(int argCnt, char **args)

       } else

         printf("missing begin time for \"-ct\"\n");

     }

+    // adapt duration of movie

+    else if (strcmp(args[i], "-dur") == 0) {

+      if (i + 1 < argCnt) {

+        unsigned int duration;

+        i++;

+        if (sscanf(args[i], "%u", &duration) != 1)

+          printf("invalid duration \"%s\"\n", args[i]);

+        else if (pMovie == NULL)

+          printf("no movie loaded to adapt duration of\n");

+        else {

+          BlinkenMovieAdaptDuration(pMovie, duration);

+          printf("duration adapted to %u ms\n", duration);

+        }

+      } else

+        printf("missing new duration for movie for \"-dur\"\n");

+    }

     // delete frames

     else if (strcmp(args[i], "-d") == 0) {

       if (i + 2 < argCnt) {

@@ -540,8 +540,8 @@ void BlinkenMovieCutTime(stBlinkenMovie *pMovie,

   int frameCnt;

   stBlinkenFrame **ppNewFrames;

-  // do nothing if empty movie

-  if (pMovie->frameCnt < 1)

+  // do nothing if no movie or empty movie

+  if (pMovie == NULL || pMovie->frameCnt < 1)

     return;

   // get movie duration

@@ -626,6 +626,44 @@ void BlinkenMovieCutTime(stBlinkenMovie *pMovie,

   }

 }

+void BlinkenMovieAdaptDuration(stBlinkenMovie *pMovie,

+                               int duration /* in ms */)

+{

+  int old_duration, old_curtime, curtime;

+  int i, old_dur, dur, old_end, end;

+

+  // do nothing if no movie, empty movie or invalid duration

+  if (pMovie == NULL || pMovie->frameCnt < 1 || duration <= 0)

+    return;

+

+  // get movie duration

+  old_duration = 0;

+  for (i = 0; i < pMovie->frameCnt; i++)

+    old_duration += BlinkenFrameGetDuration(pMovie->ppFrames[i]);

+

+  // adapt duration of frames

+  old_curtime = 0;

+  curtime = 0;

+  for (i = 0; i < pMovie->frameCnt; i++) {

+    // get old end time of current frame

+    old_dur = BlinkenFrameGetDuration(pMovie->ppFrames[i]);

+    old_end = old_curtime + old_dur;

+    // compute new end time and new duration

+    end = (int)((double)old_end / (double)old_duration * (double)duration

+                + 0.5);

+    dur = end - curtime;

+    if (dur < BlinkenDurationMin)

+      dur = BlinkenDurationMin;

+    if (dur > BlinkenDurationMax)

+      dur = BlinkenDurationMax;

+    // update frame duration

+    BlinkenFrameSetDuration(pMovie->ppFrames[i], dur);

+    // advance time

+    old_curtime += old_dur;

+    curtime += dur;

+  }

+}

+

 void BlinkenMovieResize(stBlinkenMovie *pMovie, int height, int width,

                         int channels, int maxval)

 {

@@ -62,6 +62,8 @@ int BlinkenMovieConcat(stBlinkenMovie *pMovie,

 void BlinkenMovieReverse(stBlinkenMovie *pMovie);

 void BlinkenMovieCutTime(stBlinkenMovie *pMovie,

                          int begin /* in ms */, int end /* in ms */);

+void BlinkenMovieAdaptDuration(stBlinkenMovie *pMovie,

+                               int duration /* in ms */);

 void BlinkenMovieResize(stBlinkenMovie *pMovie, int height, int width,

                         int channels, int maxval);