网络MPEG4视频传输(基于Xvid库)Demo

最新推荐文章于 2024-06-20 09:55:49 发布

转载最新推荐文章于 2024-06-20 09:55:49 发布 · 1.5k 阅读

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#网络 #integer #byte #forms #colors #filter

本文介绍了一个基于TCP协议的音视频传输系统实现，包括服务器端接收和客户端发送两大部分。服务器端利用Xvid解码器对收到的数据进行解码并显示，客户端则通过DirectShow捕获视频并使用Xvid编码器进行实时压缩，再通过网络发送。

//*****************************************服务器接收代码******************************************* unit Unit1; interface uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, ExtCtrls, StdCtrls, IdBaseComponent, IdComponent, IdTCPServer, DSPack,lib_xvid; type TForm1 = class(TForm) idtcpsrvr1: TIdTCPServer; btn1: TButton; img1: TImage; mmo1: TMemo; btn2: TButton; lbl1: TLabel; tmr1: TTimer; procedure btn1Click(Sender: TObject); procedure idtcpsrvr1Connect(AThread: TIdPeerThread); procedure idtcpsrvr1Execute(AThread: TIdPeerThread); procedure FormCreate(Sender: TObject); procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean); procedure btn2Click(Sender: TObject); procedure tmr1Timer(Sender: TObject); procedure idtcpsrvr1Disconnect(AThread: TIdPeerThread); private { Private declarations } xvid_Version:Integer; xvid_gbl: xvid_gbl_init_t; xVid_decode : xvid_dec_create_t; xvid_decFrame: xvid_dec_frame_t; public { Public declarations } end; type TimgSendBuf = packed record ImgSize:Word; Buffer:array [0..352*288*3] of Byte; end; var Form1: TForm1; imgSendBuf:TimgSendBuf; FrameImg:array [0..352*288*3 ] of Byte; FrameCount : LongWord = 0; FrameBytes : LongWord = 0; PerFrame : LongWord= 0; PerFrameBytes : LongWord =0; implementation {$R *.dfm} procedure TForm1.btn1Click(Sender: TObject); begin idtcpsrvr1.DefaultPort := 9001; idtcpsrvr1.Active := True; mmo1.Lines.Add('服务启动！'); end; procedure TForm1.idtcpsrvr1Connect(AThread: TIdPeerThread); begin mmo1.Lines.Add('有客户端连接！'); end; procedure TForm1.idtcpsrvr1Execute(AThread: TIdPeerThread); var SpBmp:TBitmap; Ret:Integer; BIInfo: TBitmapInfo; BitmapHandle: HBitmap; DIBPtr: Pointer; DIBSize: LongInt; begin try SpBmp := TBitmap.Create; AThread.Connection.ReadBuffer(imgSendBuf.ImgSize,2); AThread.Connection.ReadBuffer(imgSendBuf.Buffer,imgSendBuf.ImgSize); //初始化解码数据帧结构 xvid_decFrame.version := xvid_Version; xvid_decFrame.general := 0; xvid_decFrame.bitstream := @imgSendBuf.Buffer[0]; //输入解压的位流 xvid_decFrame.length := imgSendBuf.ImgSize; //输入位流长度 xvid_decFrame.output.csp := XVID_CSP_BGR; //色彩空间 xvid_decFrame.output.plane[0] := @FrameImg[0]; //解压后输出的缓冲区 xvid_decFrame.output.stride[0] := 320 * 3; //每行字节数 ret := xvid_decore(xVid_decode.handle , XVID_DEC_DECODE, @xvid_decFrame, nil); //mmo1.Lines.Add('Img:'+ IntToStr(imgSendBuf.ImgSize) + ' Ret=:' + IntToStr(Ret)); //从视频缓冲区中取得当前位图 BIInfo.bmiHeader.biSize := 40; // SizeOf(TBitmapInfoHeader); BIInfo.bmiHeader.biWidth := 320; BIInfo.bmiHeader.biHeight := 240; BIInfo.bmiHeader.biPlanes := 1; BIInfo.bmiHeader.biBitCount := 24; BIInfo.bmiHeader.biCompression := 0; BIInfo.bmiHeader.biSizeImage := 320 * 240 * 3; BIInfo.bmiHeader.biXPelsPerMeter := 0; BIInfo.bmiHeader.biYPelsPerMeter := 0; BIInfo.bmiHeader.biClrUsed := 0; BIInfo.bmiHeader.biClrImportant := 0; BitmapHandle := CreateDIBSection(0, BIInfo,DIB_RGB_COLORS, DIBPtr, 0, 0); Move(FrameImg, DIBPtr^, BIInfo.bmiHeader.biSizeImage ); SpBmp.Handle := BitmapHandle; Img1.Canvas.Lock; Img1.Canvas.Draw(0,0,SpBmp); Img1.Canvas.Unlock; Inc(FrameCount); //接收的帧 FrameBytes := FrameBytes + imgSendBuf.ImgSize + 2; //接收的字节 finally DeleteObject(BitmapHandle); SpBmp.Free; end; end; procedure TForm1.FormCreate(Sender: TObject); begin //XVID库初始化操作 xvid_Version :=XVID_MAKE_VERSION(1,1,0); xvid_gbl.version := xvid_Version; //Version:1.1.0 xvid_gbl.cpu_flags := Word(XVID_CPU_FORCE or XVID_CPU_ASM);//0:自动检查CPU，XVID_CPU_FORCE or XVID_CPU_ASM：强制使用ASM汇编优化 xvid_gbl.debug := 0; //调试级别 //初始化编解码 xvid_global(nil, XVID_GBL_INIT, @xvid_gbl, nil); xVid_decode.version := xvid_Version; xVid_decode.width := 320; xVid_decode.height := 240; //创建解码器 xvid_decore(nil,XVID_DEC_CREATE,@xVid_decode, nil); end; procedure TForm1.FormCloseQuery(Sender: TObject; var CanClose: Boolean); begin if Assigned(xVid_decode.handle) then xvid_decore(xVid_decode.handle,XVID_DEC_DESTROY,@xvid_decode,nil); end; procedure TForm1.btn2Click(Sender: TObject); begin idtcpsrvr1.Active := False; end; procedure TForm1.tmr1Timer(Sender: TObject); begin PerFrame := FrameCount - PerFrame; PerFrameBytes := (FrameBytes - PerFrameBytes) div 1024; lbl1.Caption := '当前流量：' + IntToStr(PerFrame) + '帧/秒' + IntToStr(PerFrameBytes) + 'k/秒'; PerFrameBytes := FrameBytes; PerFrame := FrameCount; end; procedure TForm1.idtcpsrvr1Disconnect(AThread: TIdPeerThread); begin mmo1.Lines.Add('客户端断开连接！'); end; end. //*****************************************客户端发送视频部分************************************************* unit main; interface uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, DSUtil, StdCtrls, DSPack, DirectShow9, Menus, ExtCtrls,lib_xvid, IdBaseComponent, IdComponent, IdTCPServer,IdGlobal, IdTCPConnection, IdTCPClient, IdThreadMgr, IdThreadMgrDefault, IdAntiFreezeBase, IdAntiFreeze; type TVideoForm = class(TForm) FilterGraph: TFilterGraph; VideoWindow: TVideoWindow; MainMenu1: TMainMenu; Devices: TMenuItem; Filter: TFilter; Image: TImage; SampleGrabber: TSampleGrabber; SnapShot: TButton; CallBack: TCheckBox; mmo1: TMemo; lbl1: TLabel; idtcpclnt1: TIdTCPClient; btn1: TButton; procedure FormCreate(Sender: TObject); procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean); procedure SnapShotClick(Sender: TObject); procedure SampleGrabberBuffer(sender: TObject; SampleTime: Double; pBuffer: Pointer; BufferLen: Integer); private // XVID ENCODER xvid_gbl: xvid_gbl_init_t; xvid_enc : xvid_enc_create_t; xvid_encFrame: xvid_enc_frame_t; xvid_encStats: xvid_enc_stats_t; public procedure OnSelectDevice(sender: TObject); end; type TimgSendBuf = packed record ImgSize:Word; Buffer:array [0..352*288*3] of Byte; end; var VideoForm: TVideoForm; SysDev: TSysDevEnum; FrameBuf:array [0..352*288*3 ] of Byte; FrameImg:array [0..352*288*3 ] of Byte; FrameSequece : LongWord= 0; xvid_Version:Integer; FrameByteCount : LongWord = 0; CurFrame: LongWord = 0; Sending:BOOL=False; imgSendBuf:TimgSendBuf; implementation {$R *.dfm} procedure TVideoForm.FormCreate(Sender: TObject); var i: integer; Device: TMenuItem; begin xvid_Version :=XVID_MAKE_VERSION(1,1,0); SysDev:= TSysDevEnum.Create(CLSID_VideoInputDeviceCategory); if SysDev.CountFilters > 0 then for i := 0 to SysDev.CountFilters - 1 do begin Device := TMenuItem.Create(Devices); Device.Caption := SysDev.Filters[i].FriendlyName; Device.Tag := i; Device.OnClick := OnSelectDevice; Devices.Add(Device); end; end; procedure TVideoForm.OnSelectDevice(sender: TObject); begin Self.DoubleBuffered := True; FilterGraph.ClearGraph; FilterGraph.Active := false; Filter.BaseFilter.Moniker := SysDev.GetMoniker(TMenuItem(Sender).tag); FilterGraph.Active := true; with FilterGraph as ICaptureGraphBuilder2 do begin RenderStream(@PIN_CATEGORY_PREVIEW, nil, Filter as IBaseFilter, SampleGrabber as IBaseFilter, VideoWindow as IbaseFilter); end; try //XVID库初始化操作 xvid_gbl.version := xvid_Version; //Version:1.1.0 xvid_gbl.cpu_flags := Word(XVID_CPU_FORCE or XVID_CPU_ASM);//0:自动检查CPU，XVID_CPU_FORCE or XVID_CPU_ASM：强制使用ASM汇编优化 xvid_gbl.debug := 0; //调试级别 //初始化编解码 xvid_global(nil, XVID_GBL_INIT, @xvid_gbl, nil); // XVID编码器初始化 xvid_enc.version := xvid_Version; //编码器参数 xvid_enc.global := XVID_GLOBAL_PACKED; //全局标志 xvid_enc.width := 320; //压缩视频宽度 xvid_enc.height := 240; //压缩视频高度 xvid_enc.fbase := 3; //基本帧率/每秒 = fbase * 10 = 30 xvid_enc.fincr := 1; //帧率增长步长，0：可变步长，>1实际增长步长 xvid_enc.profile := XVID_PROFILE_AS_L4; //压缩级别，MPEG4-ASP最高压缩级别 xvid_enc.max_key_interval := 0; //最大关键帧间隔 xvid_enc.frame_drop_ratio := 0; //丢帧率；0~100 xvid_enc.max_bframes := 0; //是否采用B帧，一般采用I，P帧，如果1=PB帧 xvid_enc.bquant_offset := 0; xvid_enc.bquant_ratio := 0; //创建编码器 xvid_encore(nil, XVID_ENC_CREATE, @xvid_enc, nil); //初始化压缩数据帧结构 xvid_encFrame.version := xvid_Version; // --- VOL FLAGS xvid_encFrame.vol_flags := 0;//XVID_VOL_MPEGQUANT OR XVID_VOL_QUARTERPEL OR XVID_VOL_GMC; // --- VOP FLAGS xvid_encFrame.vop_flags := 0;//XVID_VOP_HALFPEL or XVID_VOP_INTER4V; xvid_encFrame.motion := 0;//XVID_ME_ADVANCEDDIAMOND16 or XVID_ME_HALFPELREFINE16 or //XVID_ME_ADVANCEDDIAMOND8 or XVID_ME_HALFPELREFINE8; //运动估计 xvid_encFrame.quant := 4; //质量控制=量化参数，0~31，数值越小质量越高和码率成反比 xvid_encFrame.coding_type := XVID_TYPE_AUTO; //XVID_TYPE_AUTO=让编码器自动决定，I帧编码是关键帧，P帧编码是帧内预测 except Exit; end; FilterGraph.Play; end; procedure TVideoForm.FormCloseQuery(Sender: TObject; var CanClose: Boolean); begin CallBack.Checked := False; SysDev.Free; FilterGraph.ClearGraph; FilterGraph.Active := false; //关闭编解码器 if Assigned(xvid_enc.handle) then xvid_encore(xvid_enc.handle,XVID_ENC_DESTROY, @xvid_enc, nil); end; procedure TVideoForm.SnapShotClick(Sender: TObject); begin idtcpclnt1.Disconnect; idtcpclnt1.Host:='127.0.0.1'; idtcpclnt1.Port:=9001; idtcpclnt1.Connect; end; procedure TVideoForm.SampleGrabberBuffer(sender: TObject; SampleTime: Double; pBuffer: Pointer; BufferLen: Integer); var SpBmp:TBitmap; Ret:Integer; begin if CallBack.Checked then begin try xvid_encFrame.bitstream := @FrameBuf[0]; xvid_encFrame.input.csp := XVID_CSP_BGR; //输入是rgb位图 xvid_encFrame.input.plane[0] := pBuffer; //RGB位图数据，每个像素有3个字节,(R,G,B) xvid_encFrame.input.stride[0] := 320 * 3; //每行字节数 //开始压缩 //Ret := xvid_encore(xvid_enc.handle, XVID_ENC_ENCODE, @xvid_encFrame,@xvid_encStats); //返回编码之后的字节 Ret := xvid_encore(xvid_enc.handle, XVID_ENC_ENCODE, @xvid_encFrame,nil); //返回编码之后的字节 //网络发送 if idtcpclnt1.Connected then begin imgSendBuf.ImgSize := Ret; Move(FrameBuf,imgSendBuf.Buffer,Ret); idtcpclnt1.WriteBuffer(imgSendBuf,Ret+2,True); end; except end; end; end; end.