scrcpy/app/src/fps_counter.h

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#ifndef FPSCOUNTER_H
#define FPSCOUNTER_H
#include "common.h"
#include <stdatomic.h>
#include <stdbool.h>
#include <stdint.h>
#include <SDL2/SDL_mutex.h>
#include <SDL2/SDL_thread.h>
struct fps_counter {
SDL_Thread *thread;
SDL_mutex *mutex;
SDL_cond *state_cond;
// atomic so that we can check without locking the mutex
// if the FPS counter is disabled, we don't want to lock unnecessarily
atomic_bool started;
// the following fields are protected by the mutex
bool interrupted;
unsigned nr_rendered;
unsigned nr_skipped;
uint32_t next_timestamp;
};
bool
fps_counter_init(struct fps_counter *counter);
void
fps_counter_destroy(struct fps_counter *counter);
bool
fps_counter_start(struct fps_counter *counter);
void
fps_counter_stop(struct fps_counter *counter);
bool
fps_counter_is_started(struct fps_counter *counter);
// request to stop the thread (on quit)
// must be called before fps_counter_join()
void
fps_counter_interrupt(struct fps_counter *counter);
void
fps_counter_join(struct fps_counter *counter);
void
fps_counter_add_rendered_frame(struct fps_counter *counter);
void
fps_counter_add_skipped_frame(struct fps_counter *counter);
#endif