66 lines
2.4 KiB
C
66 lines
2.4 KiB
C
// ge_fps.c
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#include "ge_fps.h"
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// 初始化FPS控制器
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void ge_fps_init(ge_fps_controller_t* fps_ctrl, ge_u32_t target_fps,
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ge_fps_get_us_func_t get_us, ge_fps_sleep_us_func_t sleep_us) {
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fps_ctrl->target_fps = target_fps;
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fps_ctrl->frame_duration = 1000 / target_fps;
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fps_ctrl->last_frame_time = get_us();
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fps_ctrl->frame_time = 0;
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fps_ctrl->sleep_time = 0;
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fps_ctrl->frame_count = 0;
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fps_ctrl->fps = 0;
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fps_ctrl->last_fps_time = fps_ctrl->last_frame_time;
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fps_ctrl->call_get_us = get_us;
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fps_ctrl->call_sleep_us = sleep_us;
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}
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// 帧开始
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void ge_fps_begin_frame(ge_fps_controller_t* fps_ctrl) {
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fps_ctrl->last_frame_time = fps_ctrl->call_get_us();
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}
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// 帧结束
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void ge_fps_end_frame(ge_fps_controller_t* fps_ctrl) {
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ge_u32_t current_time = fps_ctrl->call_get_us();
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fps_ctrl->frame_time = current_time - fps_ctrl->last_frame_time;
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// 帧率自适应算法
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if (fps_ctrl->frame_time < fps_ctrl->frame_duration) {
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ge_u32_t sleep_time = fps_ctrl->frame_duration - fps_ctrl->frame_time;
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// 动态调整休眠精度
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if (sleep_time > 2000) { // >2ms使用Sleep
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fps_ctrl->call_sleep_us(sleep_time - 1000); // 提前1ms唤醒
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current_time = fps_ctrl->call_get_us();
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// 剩余时间忙等待
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while ((current_time - fps_ctrl->last_frame_time) < fps_ctrl->frame_duration) {
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current_time = fps_ctrl->call_get_us();
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}
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} else {
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// 短时间直接忙等待
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while ((fps_ctrl->call_get_us() - fps_ctrl->last_frame_time) < fps_ctrl->frame_duration);
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}
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}
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// 更新FPS计数（同原逻辑）
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fps_ctrl->frame_count++;
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if (current_time - fps_ctrl->last_fps_time >= 1000000) {
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fps_ctrl->fps = fps_ctrl->frame_count;
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fps_ctrl->frame_count = 0;
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fps_ctrl->last_fps_time = current_time;
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// 动态调整目标帧时间（±5%容差）
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// ge_u32_t avg_frame_time = 1000000 / fps_ctrl->fps;
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// if (avg_frame_time > fps_ctrl->frame_duration * 1.05f) {
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// fps_ctrl->frame_duration = avg_frame_time;
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// } else if (avg_frame_time < fps_ctrl->frame_duration * 0.95f) {
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// fps_ctrl->frame_duration = GE_MAX(
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// fps_ctrl->target_fps * 1000,
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// avg_frame_time
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// );
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// }
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}
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} |