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Mjpg-streamer source code analysis

and connects this Single Input-plugin with many output-plugins, and almost all the work is handed over to these plug-ins. PluginsInput-pluginsLike other common input-plugin, these plug-ins copy JPEG images to the globally accessible memory, and then send signals to the waiting process (tell him: I'm coming! ). Input_testpicture.so This module has already been added to the image compilation process (just like its name: test), which means you can perform testing without a camera (If your compilat

Windows blue screen code table

disable the installed driver or software. 0x000000c2: bad_pool_caller◆ Error analysis: a process or driver at the kernel layer tries to operate in the memory by mistake. It is usually a driver orSoftware with bugs. ◇ Solution: Please refer to the general solution-related items described above for troubleshooting. 0x000000ceriver_unloaded_without_cancelling_pending_operations◆ Error Analysis: usually caused by problematic drivers or system services.◇ Solution: Please refer to the general solutio

Operating system process description

HTML documents for sites and other categories. Em_exec.exeProcess file: em_exec or em_exec.exeProcess name: Logitech mouse settingsDescription: This is the process of the Logitech mouseware status bar icon. It is used to control the mouse properties and view the mouseware help. Excel.exeProcess file: Excel or excel.exeProcess name: Microsoft ExcelDescription: Microsoft Excel is a workbook program included

Wireless Network Camera Linux under the camera driver support situation __linux

and user space tool patches. Most mass-storage devices, such as USB drives, follow the USB specification, so they can be manipulated with a single drive. Similarly, UVC compatible peripherals require only one universal driver.USB cameras can generally be divided into UVC cameras and NON-UVC cameras. Recommended purchase UVC cameras. UVC is an open standard with a well maintained drive, which is part of the kernel code. After inserting the camera, you can work without having to compile or instal

Application of Variable parameters in macro definition in C Language

macro: You need to load the Log Module in the android. mk file and add the DEBUG option: LOCAL_LDLIBS: =-llog # Add the Log Module LOCAL_CFLAGS + =-DDEBUG NDKTest. cpp #include #include #define LOG_TAG "HelloNDK"#ifdef DEBUG#define LOGI(...) __android_log_print(ANDROID_LOG_INFO, LOG_TAG, __VA_ARGS__)#define LOGD(...) __android_log_print(ANDROID_LOG_DEBUG, LOG_TAG, __VA_ARGS__)#define LOGE(...) __android_log_print(ANDROID_LOG_ERROR, LOG_TAG,

Two consecutive fread errors and fread return values

I am writing a code today. I want to read a buffer frame into a file. Because there are two different implementations of neon and opencl, I need to read the file twice. The Code is as follows: 1 FILE *file; 2 int i = 0; 3 INTER_BLOCK_SIZE_GPU_RS *block_size; 4 file = fopen(name, "rb"); 5 if (file == NULL) { 6 LOGE("Can‘t open file: %s\n", name); 7 return ; 8 } 9 // LOGI("file open OK:%s",name);10 #if USE_OCL11

Android implements sleep wake-up based on standard Linux (3)

(const char * const paths []) { Int I; For (I = 0; I Int FD = open (paths [I], o_rdwr ); If (FD Fprintf (stderr, "Fatal error opening/" % S/"/N", paths [I]); G_error = errno; Return-1; } G_fds [I] = FD; } G_error = 0; Return 0; } Staticinline void initialize_fds (void) { If (g_initialized = 0 ){ If (open_file_descriptors (new_paths) Open_file_descriptors (old_paths ); On_state = "Wake "; Off_state = "standby "; } G_initialized = 1; } } Int acquire_wake_lock (INT lock, const char * ID) { I

Android platform read/write i2c Device Development Note 1

) {LogE ("IIC stub HAL: failed to open/dev/i2c-1 -- % S. ", strerror (errno); free (Dev); Return-efault;} else {Logi (" IIC stub HAL: Open/dev/i2c-1 successfully. "); iic_data.nmsgs = 2; iic_data.msgs = (struct i2c_msg *) malloc (iic_data.nmsgs * sizeof (struct i2c_msg); If (! Iic_data.msgs) {LogE ("malloc error"); close (Dev-> FD); exit (1) ;}ioctl (Dev-> FD, i2c_timeout, 2 ); // set the timeout value IOCTL (Dev-> FD, i2c_retries, 1); // set the numb

Android Hal Analysis Report

; Led_off (Dev, led_c608 );Led_off (Dev, led_c609 );Success:Return 0;} (2.4) Fill in the specific API operation codeInt led_on (struct led_control_device_t * Dev, int32_t led){Int FD;Logi ("led stub: Set % d on.", LED );FD = Dev-> FD;Switch (LED ){Case led_c608:IOCTL (FD, 1, LED );Break;Case led_c609:IOCTL (FD, 1, LED );Break;Default:Return-1;}Return 0;} Int led_off (struct led_control_device_t * Dev, int32_t led){Int FD;

Android keyboard/touch panel Analysis

)); New_devices = (device_t **) realloc (mdevices, sizeof (mdevices [0]) * (mfdcount + 1 )); Allocate space for new_mfds and MFDs to save the FD. MFDs [mfdcount]. FD = FD for each event (X; MFDs [mfdcount]. Events = Pollin; Put FD in the MFDs array. // see if this is a keyboard, and classify it. Uint8_t key_bitmask [(key_max + 1)/8]; Memset (key_bitmask, 0, sizeof (key_bitmask )); Logv ("getting keys ..."); If (IOCTL (FD, eviocgbit (ev_key, sizeof (key_bitmask), key_bitmask)> = 0 ){ //

Android JNI socket

In fact, this title is meaningless. But I want to write it here if I want to check a lot of information. The socket programming of Android-JNI is to call socket programming of underlying Linux. The Android platform generally only needs to care about the client code, as shown below: (copy from the far-sighted embedded Linux application development materials, there is no good example at hand) /* Client. C */# include Then, you can change the sample of Android-ndk to JNI. The following method ca

JNI Output Log Information

1, modify the ANDROID.MKIf the resulting library file is a ". So file", add the following in Android.mk:local_ldlibs:=-l$ (sysroot)/usr/lib-llogIf the generated library file is ". A file", add the following in Android.mk:Local_ldlibs:=-llog2 referencing a log header file in a. C or. cpp fileAdd the following content:// introduction of log header file #include // log Tag #define tag "hello_load"// define info #define LOGI (...) __android_log_ Pr

Questions about retrieving PHP return values

PHP return value retrieval lt; form nbsp; action = "comment01.php" nbsp; method = 'post' gt; lt; p nbsp; align = "center" gt; lt; textarea nbsp; name = "retrieving txt PHP return values $ Yjj = key ($ _ GET ); $ Logi = file ("./data/list.txt", FILE_IGNORE_NEW_LINES ); Foreach ($ Logi as $ Key => $ Val ){ List ($ num, $ title) = explode ("|", $ Val ); If ($ title = $ yjj) { $ Comment = $ _ POST ['

PHP buttons return values

The problem of returning values of multiple buttons in PHP reads the name in the txt text cyclically, and adds a button after each name. The trouble is how to set the return value of the button, how can I match the names and buttons one by one? lt; input nbsp; type = "submit" nbsp; value = "" nbsp; name = '' nbsp;/ gt; PHP multiple button return values Cyclically read the name in the txt text, and add a button after each name. The trouble is how to set the button return value and how to matc

Image Gaussian blur application-involving the use of libjpeg, NDK operations on Surfaceview, image obfuscation, source code

circleInput two image template blur function//round blur picture int circlefuzzydouble (unsigned char * * img, unsigned char * * imgtmp, int width,int height, int comp onent, int x0, int y0, int r) {logi ("Circlefuzzy");//Gaussian kernel matrix double * * kernel;double sigma = 10.0;int ksize; Gaussiansmooth2d (Sigma, kernel, ksize); Logi ("Get Gaussian Matrix");//3 handler int powr2 = R * r;//pending area

Zygote Startup Process of android Core Mechanism

scheduling group is reset to default by the caller// Once this method returns after the transaction is complete.AndroidSetThreadSchedulingGroup (mMyThreadId,ANDROID_TGROUP_BG_NONINTERACT );}}// LOGI (">>>> TRANSACT from pid % d uid % d \ n", mCallingPid, mCallingUid );Parcel reply;IF_LOG_TRANSACTIONS (){TextOutput: Bundle _ B (alog );Alog }If (tr.tar get. ptr ){Sp Const status_t error = B-> transact (tr. code, buffer, reply, 0 );If (error } Else {Co

Explanation of Android Vibrator System

"enable echo"10000"enable 10000enable Run cat enable to view the remaining number of current vibration time: #catenable catenable 0 Ii. Hardware Abstraction Layer Android encapsulates calls to the underlying driver and becomes the hardware abstraction layer. /Hardware/libhardware_legacy/vibrator. c intvibrator_on(inttimeout_ms) { /*constanton,uptomaximumallowedtime*/ returnsendit(timeout_ms); } intvibrator_off() { returnsendit(0); } Iii. JNI framework l

Android heavyweight development-Research on Improving android startup speed

archive doesn' t* Have any files in it, the end-of-central-directory signature* (KEOCDSignature ).*/Val = get4LE (basePtr );If (val = kEOCDSignature ){LOGI (Found Zip archive, but it looks empty );Goto bail;} Else if (val! = Klhsignature ){LOGV (Not a Zip archive (found 0x % 08x), val );Goto bail;}/** Find the EOCD. We'll find it immediately unless they have a file* Comment.*/Ptr = basePtr + length-kEOCDLen;While (ptr> = basePtr ){If (* ptr = (kEOCDS

Questions about the return value of multiple buttons in PHP

PHP Multiple button return value problem Loop read the TXT text on the name, and a button after each name, the trouble is how to set the button return value, how to name and button one by one corresponding The value is set to be the same, but the return value of the name of how to set, with the previous variable assignment as if not AH. ------Solution--------------------Which means you just need to know 2.------Solution--------------------YYY in the yyy, right?Then your code should be writ

AndroidStudio2.0 Build NDK Environment & successfully compile and use

are machine generated * /#include / * Header for class com_qbao_ticket_mainactivity * /#ifndef _included_com_qbao_ticket_mainactivity#define _included_com_qbao_ticket_mainactivity#ifdef __cplusplusextern"C"{#endif/* * class:com_qbao_ticket_mainactivity * Method:add * Signature: () V */JniexportvoidJnicallJava_com_qbao_ticket_mainactivity_printhelloworld (jnienv *, jobject);#ifdef __cplusplus}#endif#endif. cpp file Codes#include #include #include "com_qbao_ticket_MainActivity.h"#define LOG_TAG "

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