/**
?*?最簡單的基于FFmpeg的AVDevice例子（屏幕錄制）
?*?Simplest?FFmpeg?Device?（Screen?Capture）
?*
?*?雷霄驊?Lei?Xiaohua
?*?leixiaohua1020@126.com
?*?中國傳媒大學/數字電視技術
?*?Communication?University?of?China?/?Digital?TV?Technology
?*?http://blog.csdn.net/leixiaohua1020
?*
?*?本程序實現了屏幕錄制功能。可以錄制并播放桌面數據。是基于FFmpeg
?*?的libavdevice類庫最簡單的例子。通過該例子，可以學習FFmpeg中
?*?libavdevice類庫的使用方法。
?*?本程序在Windows下可以使用2種方式錄制屏幕：
?*??1.gdigrab:?Win32下的基于GDI的屏幕錄制設備。
?*?????????????抓取桌面的時候，輸入URL為“desktop”。
?*??2.dshow:?使用Directshow。注意需要安裝額外的軟件screen-capture-recorder
?*?在Linux下則可以使用x11grab錄制屏幕。
?*
?*?This?software?capture?screen?of?computer.?It‘s?the?simplest?example
?*?about?usage?of?FFmpeg‘s?libavdevice?Library.?
?*?It‘s?suiltable?for?the?beginner?of?FFmpeg.
?*?This?software?support?2?methods?to?capture?screen?in?Microsoft?Windows:
?*??1.gdigrab:?Win32?GDI-based?screen?capture?device.
?*?????????????Input?URL?in?avformat_open_input（）?is?“desktop“.
?*??2.dshow:?Use?Directshow.?Need?to?install?screen-capture-recorder.
?*?It?use?x11grab?to?capture?screen?in?Linux.
?*/


#include?

#define?__STDC_CONSTANT_MACROS

#ifdef?_WIN32
//Windows
extern?“C“
{
#include?“libavcodec/avcodec.h“
#include?“libavformat/avformat.h“
#include?“libswscale/swscale.h“
#include?“libavdevice/avdevice.h“
#include?“SDL/SDL.h“
};
#else
//Linux...
#ifdef?__cplusplus
extern?“C“
{
#endif
#include?
#include?
#include?
#include?
#include?
#ifdef?__cplusplus
};
#endif
#endif

//Output?YUV420P?
#define?OUTPUT_YUV420P?0
//‘1‘?Use?Dshow?
//‘0‘?Use?GDIgrab
#define?USE_DSHOW?0

//Refresh?Event
#define?SFM_REFRESH_EVENT??（SDL_USEREVENT?+?1）

int?thread_exit=0;

int?sfp_refresh_thread（void?*opaque）
{
	while?（thread_exit==0）?{
		SDL_Event?event;
		event.type?=?SFM_REFRESH_EVENT;
		SDL_PushEvent（&event）;
		SDL_Delay（40）;
	}
	return?0;
}

//Show?Dshow?Device
void?show_dshow_device（）{
????AVFormatContext?*pFormatCtx?=?avformat_alloc_context（）;
????AVDictionary*?options?=?NULL;
????av_dict_set（&options“list_devices““true“0）;
????AVInputFormat?*iformat?=?av_find_input_format（“dshow“）;
????printf（“========Device?Info=============\n“）;
????avformat_open_input（&pFormatCtx“video=dummy“iformat&options）;
????printf（“================================\n“）;
}

//Show?AVFoundation?Device
void?show_avfoundation_device（）{
????AVFormatContext?*pFormatCtx?=?avformat_alloc_context（）;
????AVDictionary*?options?=?NULL;
????av_dict_set（&options“list_devices““true“0）;
????AVInputFormat?*iformat?=?av_find_input_format（“avfoundation“）;
????printf（“==AVFoundation?Device?Info===\n“）;
????avformat_open_input（&pFormatCtx““iformat&options）;
????printf（“=============================\n“）;
}



int?main（int?argc?char*?argv[]）
{

	AVFormatContext	*pFormatCtx;
	int				i?videoindex;
	AVCodecContext	*pCodecCtx;
	AVCodec			*pCodec;
	
	av_register_al

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件??????????29??2015-02-12?17:39??.gitignore
?????文件?????????514??2015-02-12?17:39??ReadMe.txt
?????文件????????1439??2015-02-12?17:39??simplest_ffmpeg_device.sln
?????文件???????35328??2015-02-12?17:39??simplest_ffmpeg_device.suo
?????目錄???????????0??2015-02-12?17:39??simplest_ffmpeg_grabdesktop\
?????文件??????????67??2015-02-12?17:39??simplest_ffmpeg_grabdesktop\.gitignore
?????文件????????1259??2015-02-12?17:39??simplest_ffmpeg_grabdesktop\ReadMe.txt
?????文件??????303616??2015-02-12?17:39??simplest_ffmpeg_grabdesktop\SDL.dll
?????文件????18936320??2015-02-12?17:39??simplest_ffmpeg_grabdesktop\avcodec-55.dll
?????文件?????1340928??2015-02-12?17:39??simplest_ffmpeg_grabdesktop\avdevice-55.dll
?????文件?????2034688??2015-02-12?17:39??simplest_ffmpeg_grabdesktop\avfilter-4.dll
?????文件?????5342720??2015-02-12?17:39??simplest_ffmpeg_grabdesktop\avformat-55.dll
?????文件??????418304??2015-02-12?17:39??simplest_ffmpeg_grabdesktop\avutil-52.dll
?????文件?????????700??2015-02-12?17:39??simplest_ffmpeg_grabdesktop\compile_cl.bat
?????文件?????????496??2015-02-12?17:39??simplest_ffmpeg_grabdesktop\compile_gcc.sh
?????文件?????????513??2015-02-12?17:39??simplest_ffmpeg_grabdesktop\compile_gcc_mac.sh
?????文件?????????529??2015-02-12?17:39??simplest_ffmpeg_grabdesktop\compile_mingw.sh
?????目錄???????????0??2015-02-12?17:39??simplest_ffmpeg_grabdesktop\include\
?????目錄???????????0??2015-02-12?17:39??simplest_ffmpeg_grabdesktop\include\SDL\
?????文件????????3233??2015-02-12?17:39??simplest_ffmpeg_grabdesktop\include\SDL\SDL.h
?????文件????????1933??2015-02-12?17:39??simplest_ffmpeg_grabdesktop\include\SDL\SDL_active.h
?????文件???????11215??2015-02-12?17:39??simplest_ffmpeg_grabdesktop\include\SDL\SDL_audio.h
?????文件?????????986??2015-02-12?17:39??simplest_ffmpeg_grabdesktop\include\SDL\SDL_byteorder.h
?????文件????????6048??2015-02-12?17:39??simplest_ffmpeg_grabdesktop\include\SDL\SDL_cdrom.h
?????文件????????1474??2015-02-12?17:39??simplest_ffmpeg_grabdesktop\include\SDL\SDL_config.h
?????文件????????2803??2015-02-12?17:39??simplest_ffmpeg_grabdesktop\include\SDL\SDL_config_dreamcast.h
?????文件????????2801??2015-02-12?17:39??simplest_ffmpeg_grabdesktop\include\SDL\SDL_config_macos.h
?????文件????????4193??2015-02-12?17:39??simplest_ffmpeg_grabdesktop\include\SDL\SDL_config_macosx.h
?????文件????????1982??2015-02-12?17:39??simplest_ffmpeg_grabdesktop\include\SDL\SDL_config_minimal.h
?????文件????????2979??2015-02-12?17:39??simplest_ffmpeg_grabdesktop\include\SDL\SDL_config_nds.h
?????文件????????3635??2015-02-12?17:39??simplest_ffmpeg_grabdesktop\include\SDL\SDL_config_os2.h
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