extern?“C“{

#ifdef?__cplusplus
?#define?__STDC_CONSTANT_MACROS
?#ifdef?_STDINT_H
??#undef?_STDINT_H
?#endif
?#?include?
#endif

}

#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
#include?
extern?“C“?{
#	include?
#	include?
}
#include?“capture.h“

static?const?int?BUFFS_REQUEST?=?4;

struct?Buffer
{
	void?*start;
	size_t?length;
};
typedef?struct?Buffer?Buffer;

struct?Ctx
{
	int?vid;
	int?width?height;	//?輸出圖像大小
	struct?SwsContext?*sws;	//?用于轉(zhuǎn)換
	int?rows;	//?用于?sws_scale（）
	int?bytesperrow;?//?用于cp到?pic_src
	AVPicture?pic_src?pic_target;	//?用于?sws_scale
	Buffer?bufs[BUFFS_REQUEST];		//?用于?mmap
????????PixelFormat?fmt;
};
typedef?struct?Ctx?Ctx;

int?capture_get_output_ptr?（void?*c?unsigned?char***ptr?int?**ls）
{
????Ctx?*ctx?=?（Ctx*）c;
????*ptr?=?ctx->pic_target.data;
????*ls?=?ctx->pic_target.linesize;
????return?1;
}

/*
	函數(shù)功能:?打開視頻設(shè)備并完成設(shè)置和內(nèi)存映射
	參考資料:?http://www.embedu.org/Column/Column320.htm
*/
void?*capture_open?（const?char?*dev_name?int?t_width?int?t_height?PixelFormat?tarfmt）
{
	int?id?=?open（dev_name?O_RDWR）;//打開視頻設(shè)備?/dev/videoX
	if?（id?
	Ctx?*ctx?=?new?Ctx;
	ctx->vid?=?id;

	//?to?query?caps
	v4l2_capability?caps;
	ioctl（id?VIDIOC_QUERYCAP?&caps）;

	//測(cè)試是否支持捕獲接口?The?device?supports?the?Video?Capture?interface.
	if?（caps.capabilities?&?V4L2_CAP_VIDEO_CAPTURE）?
	{

		//測(cè)試是否支持讀寫??The?device?supports?the?read（）?and/or?write（）?I/O?methods.
		if?（caps.capabilities?&?V4L2_CAP_READWRITE）?
		{
			//?TODO:?...
		}

		//測(cè)試是否支持流接口?The?device?supports?the?streaming?I/O?method.
		if?（caps.capabilities?&?V4L2_CAP_STREAMING）?
		{
			//?檢查是否支持?MMAP?還是?USERPTR
			v4l2_requestbuffers?bufs;
			memset（&bufs?0?sizeof（bufs））;
			bufs.count?=?BUFFS_REQUEST;//The?number?of?buffers?requested?or?granted.?This?field?is?only?used?when?memory?is?set?to?V4L2_MEMORY_MMAP.
			bufs.type?=?V4L2_BUF_TYPE_VIDEO_CAPTURE;//Type?of?the?stream?or?buffers?this?is?the?same?as?the?struct?v4l2_format?type?field.?See?Table?3-2?for?valid?values.
			bufs.memory?=?V4L2_MEMORY_MMAP;
			
			//向驅(qū)動(dòng)申請(qǐng)幀緩存?開啟內(nèi)存映射或用戶指針I(yè)/O
			if?（ioctl（id?VIDIOC_REQBUFS?&bufs）?			{
				fprintf（stderr?“%s:?don‘t?support?MEMORY_MMAP?mode!\n“?__func__）;
				close（id）;
				delete?ctx;
				return?0;
			}

			fprintf（stderr?“%s:?using?MEMORY_MMAP?mode?buf?cnt=%d\n“?__func__?bufs.count）;

			//?mmap
			for?（int?i?=?0;?i?			{
				v4l2_buffer?buf;
				memset（&buf?0?sizeof（buf））;
				buf.index=i;
				buf.type?=?bufs.type;
				buf.memory?=?bufs.memory;
				//獲取到對(duì)應(yīng)index的緩存信息，此處主要利用length信息及offset信息來完成后面的mmap操作。
				if?（ioctl（id?VIDIOC_QUERYBUF?&buf）?				{
					fprintf（stderr?“%s:?VIDIOC_QUERYBUF?ERR\n“?__func__）;
					close（id）;
					delete?ctx;
					return?0;
				}

				?//轉(zhuǎn)換成相對(duì)地址
				ctx->bufs[i].length?=?buf.length;
				ctx->bufs[i

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

????.......????????84??2012-07-10?10:04??v4l2_x264_rtmp\run.txt

????.......?????13353??2015-02-04?15:36??v4l2_x264_rtmp\vencoder.cpp

????.......???????109??2011-07-14?11:54??v4l2_x264_rtmp\README

????.......??????1027??2011-07-14?11:54??v4l2_x264_rtmp\sender.cpp

????.......??????1106??2015-02-04?15:30??v4l2_x264_rtmp\Makefile

????.......???????234??2012-07-10?15:34??v4l2_x264_rtmp\types.h

????.......???????664??2015-02-04?15:33??v4l2_x264_rtmp\vencoder.h

????.......???????412??2011-07-14?11:54??v4l2_x264_rtmp\sender.h

????.......???????393??2012-07-10?11:26??v4l2_x264_rtmp\capture.h

?????文件??????11713??2015-02-04?15:35??v4l2_x264_rtmp\rtmper.cpp

?????文件??????50220??2015-02-04?15:38??v4l2_x264_rtmp\si\liveX264.PS

?????文件????????408??2015-02-04?15:38??v4l2_x264_rtmp\si\liveX264.IMD

?????文件???????2696??2015-02-04?15:38??v4l2_x264_rtmp\si\liveX264.PR

?????文件???????8192??2015-02-04?15:38??v4l2_x264_rtmp\si\liveX264.IMB

?????文件??????12241??2015-02-04?15:38??v4l2_x264_rtmp\si\liveX264.WK3

?????文件??????14680??2015-02-04?15:38??v4l2_x264_rtmp\si\liveX264.PRI

?????文件????????448??2015-02-04?15:38??v4l2_x264_rtmp\si\liveX264.IAD

?????文件??????12288??2015-02-04?15:38??v4l2_x264_rtmp\si\liveX264.IAB

?????文件??????????0??2015-02-04?15:38??v4l2_x264_rtmp\si\liveX264.PFI

?????文件????????776??2015-02-04?15:38??v4l2_x264_rtmp\si\liveX264.PO

????.......??????7949??2012-07-10?21:11??v4l2_x264_rtmp\capture.cpp

?????目錄??????????0??2015-02-04?15:38??v4l2_x264_rtmp\si

?????目錄??????????0??2015-02-04?15:37??v4l2_x264_rtmp

-----------?---------??----------?-----??----

???????????????138993????????????????????23