lingling2012

Encoding Video

Installing

Install FFmpeg with homebrew. You'll need to install it with a couple flags for webm and the AAC audio codec.

brew install ffmpeg --with-libvpx --with-libvorbis --with-fdk-aac --with-opus

lingling2012

#import <Foundation/Foundation.h>
#import <objc/objc-runtime.h>

static const void *myMsgSend(id receiver, const char *name) {
	SEL selector = sel_registerName(name);
	IMP methodIMP = class_getMethodImplementation(object_getClass(receiver), selector);
	return methodIMP(receiver, selector);
}

void RunMyMsgSend() {

lingling2012

#import <Foundation/Foundation.h>
#import <objc/objc-runtime.h>

void PrintObjectMethods () {	
	unsigned int count = 0;
	Method *methods = class_copyMethodList([NSObject class], &count);
	for (unsigned int i = 0; i < count; i++) {
		SEL sel = method_getName(methods[i]);
		const char *name = sel_getName(sel);
		printf("%s\n", name);

lingling2012

#import <Foundation/Foundation.h>
#import <objc/objc-runtime.h>

@interface Person : NSObject 
@property (copy) NSString *givenName;
@property (copy) NSString *surname;
@end

@interface Person ()
@property (strong) NSMutableDictionary *properties;

lingling2012

/**
 * 左旋转字符串
 */
#include <stdio.h>

/**
 * 方案一
 */
void left_shit_one(char *s, int n) {
	char t = s[0];

lingling2012

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <pthread.h>

void *thread_func(void *arg);

int main(void) {
    int rs;
    pthread_t thd;

lingling2012

#include <stdio.h>

int checkEndian(void) {
    union {
        int i;
        char ch;
    }c;
    c.i = 1;
    return (c.ch == 1);
}

lingling2012

/* find index of first s1[i] that matches any s2[]. */
size_t czf_strcspn(const char *s1, const char *s2) {
    const char *sc1, *sc2;
    for (sc1 = s1; *sc1 != '\0'; ++sc1) {
        for (sc2 = s2; *sc2 != '\0'; ++sc2) {
            if (*sc1 == *sc2)
                return (sc1 - s1);
        }
    }
    return (sc1 - s1); // terminating nulls match.