int dumbfork(void) { int addr, envid, r; extern u_char end[]; // Allocate a new child environment. // The kernel will initialize it with a copy of our register state, // so that the child will appear to have called sys_env_alloc() too - // except that in the child, this "fake" call to sys_env_alloc() // will return 0 instead of the envid of the child. envid = sys_env_alloc(); if (envid < 0) panic("sys_env_fork: %e", envid); if (envid == 0) { // We're the child. // The copied value of the global variable 'env' // is no longer valid (it refers to the parent!). // Fix it and return 0. env = &envs[ENVX(sys_getenvid())]; return 0; } // We're the parent. // Eagerly copy our entire address space into the child. // This is NOT what you should do in your fork implementation. for (addr=UTEXT; addr<(u_int)end; addr+=BY2PG) duppage(envid, addr); // Also copy the stack we are currently running on. duppage(envid, ROUNDDOWN((u_int)&addr, BY2PG)); // Start the child environment running // (at the point above where the register state was copied). if ((r=sys_set_status(envid, ENV_RUNNABLE)) < 0) panic("sys_set_status: %e", r); return envid; }
/* ------------------------------------------------------------ */ int main() { list_audio_devices(alcGetString(NULL, ALC_DEVICE_SPECIFIER)); /* BBBIOlib init*/ iolib_init(); iolib_setdir(8,11, BBBIO_DIR_IN); /* Button */ iolib_setdir(8,12, BBBIO_DIR_OUT); /* LED */ // sys_info.capability = SYS_CAPABILITY_VIDEO_Tx | SYS_CAPABILITY_VIDEO_Rx | SYS_CAPABILITY_AUDIO_Tx | SYS_CAPABILITY_AUDIO_Rx; // sys_info.capability = SYS_CAPABILITY_VIDEO_Tx | SYS_CAPABILITY_AUDIO_Tx; sys_info.capability =SYS_CAPABILITY_AUDIO_Rx | SYS_CAPABILITY_VIDEO_Rx; // sys_info.capability = SYS_CAPABILITY_VIDEO_Tx; sys_info.status = SYS_STATUS_INIT; sys_info.cam.width = 320; sys_info.cam.height = 240; // sys_info.cam.pixel_fmt = V4L2_PIX_FMT_YUV420; sys_info.cam.pixel_fmt = V4L2_PIX_FMT_YUYV; /* alloc RGB565 buffer for frame buffer data store */ RGB565_buffer = (unsigned char *)malloc(sys_info.cam.width * sys_info.cam.height *2); /* step Codec register */ avcodec_register_all(); av_register_all(); video_encoder_init(sys_info.cam.width, sys_info.cam.height, sys_info.cam.pixel_fmt); video_decoder_init(sys_info.cam.width, sys_info.cam.height, sys_info.cam.pixel_fmt); printf("Codec init finish\n"); /* step Frame buffer initial*/ if(FB_init() == 0) { fprintf(stderr, "Frame Buffer init error\n"); } FB_clear(var_info.xres, var_info.yres); sys_set_status(SYS_STATUS_IDLE); /* Create Video thread */ if(sys_info.capability & SYS_CAPABILITY_VIDEO_Rx) pthread_create(&Video_Rx_thread, NULL, Video_Rx_loop, NULL); if(sys_info.capability & SYS_CAPABILITY_VIDEO_Tx) pthread_create(&Video_Tx_thread, NULL, Video_Tx_loop, NULL); /* Create Audio thread*/ if(sys_info.capability & SYS_CAPABILITY_AUDIO_Rx) pthread_create(&Audio_Rx_thread, NULL, Audio_Rx_loop, NULL); if(sys_info.capability & SYS_CAPABILITY_AUDIO_Tx) pthread_create(&Audio_Tx_thread, NULL, Audio_Tx_loop, NULL); /* Signale SIGINT */ signal(SIGINT, SIGINT_release); /* Main loop */ while(sys_get_status() != SYS_STATUS_RELEASE) { /* Button on */ if (is_high(8,11)) { sys_set_status(SYS_STATUS_WORK); pin_high(8, 12); /* LED on*/ } else { // FB_clear(var_info.xres, var_info.yres); // sys_set_status(SYS_STATUS_IDLE); sys_set_status(SYS_STATUS_WORK); pin_low(8, 12); /* LED off */ } //usleep(100000); sleep(1); } pin_low(8, 12); /* LED off */ /* ******************************************************* * Main thread for SIP server communication and HW process * * * *******************************************************/ /* release */ if(sys_info.capability & SYS_CAPABILITY_VIDEO_Tx) pthread_join(Video_Tx_thread,NULL); if(sys_info.capability & SYS_CAPABILITY_VIDEO_Rx) pthread_join(Video_Rx_thread,NULL); if(sys_info.capability & SYS_CAPABILITY_AUDIO_Tx) pthread_join(Audio_Tx_thread,NULL); if(sys_info.capability & SYS_CAPABILITY_AUDIO_Rx) pthread_join(Audio_Rx_thread,NULL); munmap(FB_ptr, FB_scerrn_size); close(FB); free(RGB565_buffer); video_encoder_release(); video_decoder_release(); printf("finish\n"); return 0; }
/* ------------------------------------------------------------ */ void SIGINT_release(int arg) { sys_set_status(SYS_STATUS_RELEASE); printf("System Relase ... \n"); }