picomax 中 rkipc 的main.c文件分析

main函数

int main(int argc, char **argv) {//wait_key_event 这个进程的pidpthread_t key_chk;LOG_DEBUG("main begin\n");//luckfox-pico/project/app/rkipc/rkipc/common/common.c中//显示版本rkipc_version_dump();//设置信号signal(SIGINT, sig_proc);signal(SIGTERM, sig_proc);//从命令中提取参数rkipc_get_opt(argc, argv);LOG_INFO("rkipc_ini_path_ is %s, rkipc_iq_file_path_ is %s, rkipc_log_level ""is %d\n",rkipc_ini_path_, rkipc_iq_file_path_, rkipc_log_level);// init// 各种初始化rk_param_init(rkipc_ini_path_);rk_network_init(NULL);rk_system_init();if (rk_param_get_int("video.source:enable_npu", 0))rkipc_rockiva_init();if (rk_param_get_int("video.source:enable_aiq", 1)) {rk_isp_init(0, rkipc_iq_file_path_);if (rk_param_get_int("isp:init_form_ini", 1))rk_isp_set_from_ini(0);}RK_MPI_SYS_Init();rk_video_init();if (rk_param_get_int("audio.0:enable", 0))rkipc_audio_init();rkipc_server_init();rk_storage_init();//开线程 监视键盘输入pthread_create(&key_chk, NULL, wait_key_event, NULL);//死循环while (g_main_run_) {usleep(1000 * 1000);}// deinitpthread_join(key_chk, NULL);rk_storage_deinit();rkipc_server_deinit();rk_system_deinit();rk_video_deinit();if (rk_param_get_int("video.source:enable_aiq", 1))rk_isp_deinit(0);if (rk_param_get_int("audio.0:enable", 0))rkipc_audio_deinit();RK_MPI_SYS_Exit();if (rk_param_get_int("video.source:enable_npu", 0))rkipc_rockiva_deinit();rk_network_deinit();rk_param_deinit();return 0;
}

wait_key_event函数

一般情况下rkipc都是后台运行不用注意键盘输入

static void *wait_key_event(void *arg) {//打开键盘事件int key_fd;key_fd = open("/dev/input/event0", O_RDONLY);if (key_fd < 0) {LOG_ERROR("can't open /dev/input/event0\n");return NULL;}fd_set rfds;int nfds = key_fd + 1;struct timeval timeout;struct input_event key_event;//死循环while (g_main_run_) {//使用select监视键盘变化// The rfds collection must be emptied every time,// otherwise the descriptor changes cannot be detectedtimeout.tv_sec = 1;FD_ZERO(&rfds);FD_SET(key_fd, &rfds);select(nfds, &rfds, NULL, NULL, &timeout);// wait for the key event to occurif (FD_ISSET(key_fd, &rfds)) {read(key_fd, &key_event, sizeof(key_event));LOG_INFO("[timeval:sec:%d,usec:%d,type:%d,code:%d,value:%d]\n", key_event.time.tv_sec,key_event.time.tv_usec, key_event.type, key_event.code, key_event.value);if ((key_event.code == KEY_VOLUMEDOWN) && key_event.value) {LOG_INFO("get KEY_VOLUMEDOWN\n");rkipc_ao_init();FILE *fp = fopen("/oem/usr/share/speaker_test.wav", "rb");int size = AO_FREAD_SIZE;char *tmp_data;tmp_data = malloc(AO_FREAD_SIZE);while (size > 0) {memset((void *)tmp_data, 0, AO_FREAD_SIZE);size = fread(tmp_data, 1, AO_FREAD_SIZE, fp);rkipc_ao_write(tmp_data, AO_FREAD_SIZE);}rkipc_ao_write(tmp_data, 0);free(tmp_data);fclose(fp);rkipc_ao_deinit();}if ((key_event.code == KEY_VOLUMEUP) && key_event.value) {LOG_INFO("get KEY_VOLUMEUP\n");}}}if (key_fd) {close(key_fd);key_fd = 0;}LOG_DEBUG("wait key event out\n");return NULL;
}