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Code Issues Releases Wiki Activity

Improve framerate counting

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The FPS counter was called only on new frames, so it could not print
values regularly, especially when there are very few FPS (when the
device surface does not change).

To the extreme, it was never able to display 0 fps.

Add a separate thread to print framerate every second.
This commit is contained in:
Romain Vimont
2019-06-07 16:55:19 +02:00
parent d104d3bda9
commit e2a272bf99
6 changed files with 207 additions and 52 deletions
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21
app/src/input_manager.c
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@@ -172,16 +172,19 @@ set_screen_power_mode(struct controller *controller,
}
static void
switch_fps_counter_state(struct video_buffer *vb) {
mutex_lock(vb->mutex);
if (vb->fps_counter.started) {
switch_fps_counter_state(struct fps_counter *fps_counter) {
// the started state can only be written from the current thread, so there
// is no ToCToU issue
if (fps_counter_is_started(fps_counter)) {
fps_counter_stop(fps_counter);
LOGI("FPS counter stopped");
fps_counter_stop(&vb->fps_counter);
} else {
LOGI("FPS counter started");
fps_counter_start(&vb->fps_counter);
if (fps_counter_start(fps_counter)) {
LOGI("FPS counter started");
} else {
LOGE("FPS counter starting failed");
}
}
mutex_unlock(vb->mutex);
}
static void
@@ -339,7 +342,9 @@ input_manager_process_key(struct input_manager *input_manager,
return;
case SDLK_i:
if (ctrl && !meta && !shift && !repeat && down) {
switch_fps_counter_state(input_manager->video_buffer);
struct fps_counter *fps_counter =
input_manager->video_buffer->fps_counter;
switch_fps_counter_state(fps_counter);
}
return;
case SDLK_n: