diff options
Diffstat (limited to 'src/util.c')
| -rw-r--r-- | src/util.c | 22 |
1 files changed, 22 insertions, 0 deletions
@@ -81,6 +81,28 @@ frame_mix(struct video_frame *frame_a, struct video_frame *frame_b) } } +double +frame_diff(struct video_frame *frame_a, struct video_frame *frame_b) +{ + double average = 0; + uint8_t *row_a = frame_a->data, *col_a = NULL; + uint8_t *row_b = frame_b->data, *col_b = NULL; + + for (int y = 0; y < frame_a->height; ++y) { + col_a = row_a; + col_b = row_b; + for (int x = 0; x < frame_a->width; ++x) { + average += abs(*col_a - *col_b); + col_a++; + col_b++; + } + row_a += frame_a->stride; + row_b += frame_b->stride; + } + + return average / (frame_a->width * frame_a->height); +} + /* print time in format: "hh:mm:ss.xxx" */ void print_time(int64_t msec) { |