视频播放时遇到的问题
我之前配置了一下DierctX SDK ,然后终于可以播放视频了。但是有一个问题是,我想让视频在原窗口播放,可以它总是新建一个窗口播放。苦恼~~~ 特来发帖,寻得前辈相助。不胜感激!
代码如下:
#include <windows.h>
#include <dshow.h>
#include <stdio.h>
#pragma comment(lib,"Strmiids.lib")
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
int WINAPI WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nShowCmd)
{
static TCHAR lpszAppName[] = TEXT("HelloWin");
HWND hwnd;
MSG msg;
WNDCLASS wc;
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc = WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
wc.lpszMenuName = NULL;
wc.lpszClassName = lpszAppName;
// 注册窗口类
if (!RegisterClass(&wc))
{
MessageBox(NULL, TEXT("This program requires Windows NT!"),
lpszAppName, MB_ICONERROR);
return 0;
}
// 创建应用程序主窗口
hwnd = CreateWindow(lpszAppName,
TEXT("The Hello Program"),
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
NULL,
NULL,
hInstance,
NULL);
// 显示窗口
ShowWindow(hwnd, nShowCmd);
UpdateWindow(hwnd);
/**************************************
播放视频
*********************************************/
IGraphBuilder *pGraph = NULL;
IMediaControl *pControl = NULL;
IMediaEvent *pEvent = NULL;
//初始化COM
HRESULT hr = CoInitialize(NULL);
if (FAILED(hr)) {
printf("ERROR - Could not initialize COM library");
//return;
}
//创建过滤图表管理器并查询接口
hr = CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER, IID_IGraphBuilder, (void**)&pGraph);
if (FAILED(hr)) {
printf("ERROR - Could not create the Filter Graph Manager.");
// return;
}
hr = pGraph->QueryInterface(IID_IMediaControl, (void**)&pControl);
hr = pGraph->QueryInterface(IID_IMediaEvent, (void**)&pEvent);
//建立图表。注意在此需要改变你系统上的一个文件
hr = pGraph->RenderFile(L"F:\\我的游戏实训--保卫宝岛\\资源文件\\sendstringplay\\playmovie\\mpeg\\mpeg1.avi", NULL);
if (SUCCEEDED(hr)) {
//Run the graph.
hr = pControl->Run();
if (SUCCEEDED(hr)) {
//Wait for completion.
long evCode;
pEvent->WaitForCompletion(INFINITE, &evCode);
//注意:不要在项目中使用“无限”,因为会被无限地阻拦
}
}
pControl->Release();
pEvent->Release();
pGraph->Release();
CoUninitialize();
// 消息循环
while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
//
// 窗口过程函数
//
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
HDC hdc;
PAINTSTRUCT ps;
RECT rect;
switch (message)
{
case WM_CREATE:
return 0;
case WM_PAINT:
hdc = BeginPaint(hwnd, &ps);
GetClientRect(hwnd, &rect);
DrawText(hdc, TEXT("Hello World!"), -1, &rect,
DT_SINGLELINE | DT_CENTER | DT_VCENTER);
EndPaint(hwnd, &ps);
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}