te.rar_DirectShow

// // Copyright (c) Microsoft Corporation. All rights reserved. // // // Use of this sample source code is subject to the terms of the Microsoft // license agreement under which you licensed this sample source code. If // you did not accept the terms of the license agreement, you are not // authorized to use this sample source code. For the terms of the license, // please see the license agreement between you and Microsoft or, if applicable, // see the LICENSE.RTF on your install media or the root of your tools installation. // THE SAMPLE SOURCE CODE IS PROVIDED "AS IS", WITH NO WARRANTIES. // //========================================================================= // // THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY // KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE // IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR // PURPOSE. // // //========================================================================= #include <windows.h> #include <mmsystem.h> #include <streams.h> #include <commctrl.h> #include <commdlg.h> #include "playwnd.h" #pragma comment (lib,"Strmiids.lib") #pragma comment (lib,"ole32.lib") // // Global data // HWND ghApp=0, ghCB=0; HINSTANCE ghInst; TCHAR g_szFileName[MAX_PATH]={0}; PLAYSTATE g_psCurrent=psSTOPPED; BOOL g_bAudioOnly=FALSE; LONG g_lVolume=VOLUME_FULL; // Collection of interfaces IGraphBuilder *pGB = NULL; IMediaControl *pMC = NULL; IMediaEventEx *pME = NULL; IVideoWindow *pVW = NULL; IBasicAudio *pBA=NULL; IBasicVideo *pBV = NULL; IMediaSeeking *pMS = NULL; HRESULT PlayMovieInWindow(LPCTSTR szFile) { WCHAR wFile[MAX_PATH]; HRESULT hr; RETAILMSG(1, (TEXT("Playing media %s...\r\n"), szFile)); // Clear open dialog remnants before the slow-running RenderFile() UpdateWindow(ghApp); if(FAILED(StringCchCopy(wFile, MAX_PATH, szFile))) return E_FAIL; // Get the interface for DirectShow's GraphBuilder JIF(CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER, IID_IGraphBuilder, (void **)&pGB)); if(SUCCEEDED(hr)) { // Have the graph construct its the appropriate graph automatically JIF(pGB->RenderFile(wFile, NULL)); // QueryInterface for DirectShow interfaces JIF(pGB->QueryInterface(IID_IMediaControl, (void **)&pMC)); JIF(pGB->QueryInterface(IID_IMediaEventEx, (void **)&pME)); JIF(pGB->QueryInterface(IID_IMediaSeeking, (void **)&pMS)); // Query for video interfaces, which may not be relevant for audio files JIF(pGB->QueryInterface(IID_IVideoWindow, (void **)&pVW)); JIF(pGB->QueryInterface(IID_IBasicVideo, (void **)&pBV)); // Query for audio interfaces, which may not be relevant for video-only files JIF(pGB->QueryInterface(IID_IBasicAudio, (void **)&pBA)); // Is this an audio-only file (no video component)? CheckVisibility(); if (!g_bAudioOnly) { JIF(pVW->put_Owner((OAHWND)ghApp)); JIF(pVW->put_WindowStyle(WS_CHILD | WS_CLIPSIBLINGS | WS_CLIPCHILDREN)); } // Have the graph signal event via window callbacks for performance JIF(pME->SetNotifyWindow((OAHWND)ghApp, WM_GRAPHNOTIFY, 0)); if (g_bAudioOnly) { JIF(InitAudioWindow()); } else { JIF(InitVideoWindow()); } // Let's get ready to rumble! ShowWindow(ghApp, SW_SHOWNORMAL); UpdateWindow(ghApp); SetForegroundWindow(ghApp); SetFocus(ghApp); UpdateMainTitle(); // Run the graph to play the media file JIF(pMC->Run()); g_psCurrent=psRUNNING; SetFocus(ghApp); } return hr; } HRESULT InitVideoWindow(void) { LONG lHeight, lWidth; HRESULT hr = S_OK; RECT rect; JIF(pBV->GetVideoSize(&lWidth, &lHeight)); // RETAILMSG(1, (TEXT(" Video size: %d x %d\r\n"), lWidth, lHeight)); SetWindowPos(ghApp, NULL, 0, 0, lWidth, lHeight, SWP_NOMOVE | SWP_NOOWNERZORDER); int nTitleHeight = GetSystemMetrics(SM_CYCAPTION); int nBorderWidth = GetSystemMetrics(SM_CXBORDER); int nBorderHeight = GetSystemMetrics(SM_CYBORDER); // Account for size of title bar and borders for exact match // of window client area to default video size SetWindowPos(ghApp, NULL, 0, 0, lWidth + 2*nBorderWidth, lHeight + nTitleHeight + 2*nBorderHeight, SWP_NOMOVE | SWP_NOOWNERZORDER); GetClientRect(ghApp, &rect); JIF(pVW->SetWindowPosition(rect.left, rect.top, rect.right, rect.bottom)); return hr; } HRESULT InitAudioWindow(void) { SetWindowPos(ghApp, NULL, 0, 0, DEFAULT_AUDIO_WIDTH, DEFAULT_AUDIO_HEIGHT, SWP_NOMOVE | SWP_NOOWNERZORDER); CommandBar_DrawMenuBar(ghCB, 0); // Do something different for audio-only files PaintAudioWindow(); return S_OK; } void PaintAudioWindow(void) { PAINTSTRUCT ps; HDC hdc; RECT rect; HBRUSH hBrush; hdc = BeginPaint(ghApp, &ps); GetClientRect(ghApp, &rect); // Show white if playing an audio file, gray if not if (pMC) hBrush = (HBRUSH) GetStockObject(WHITE_BRUSH); else hBrush = (HBRUSH) GetStockObject(LTGRAY_BRUSH); FillRect(hdc, &rect, hBrush); EndPaint(ghApp, &ps); } void CheckVisibility(void) { long lVisible; HRESULT hr; g_bAudioOnly = FALSE; if (!pVW) { g_bAudioOnly = TRUE; RETAILMSG(1, (TEXT("No VideoWindow interface. Assuming audio/MIDI file or unsupported video codec.\r\n"))); return; } if (!pBV) { g_bAudioOnly = TRUE; RETAILMSG(1, (TEXT("No BasicVideo interface. Assuming audio/MIDI file or unsupported video codec.\r\n"))); return; } hr = pVW->get_Visible(&lVisible); if (FAILED(hr)) { // If this is an audio-only clip, get_Visible() won't work. // // Also, if this video is encoded with an unsupported codec, // we won't see any video, although the audio will work if it is // of a supported format. // if (hr == E_NOINTERFACE) { g_bAudioOnly = TRUE; RETAILMSG(1, (TEXT("Video window not visible. Assuming audio/MIDI file or unsupported video codec.\r\n"))); } else { RETAILMSG(1, (TEXT("Failed(%08lx) in pVW->get_Visible()!\r\n"), hr)); } return; } } void PauseClip(void) { if (!pMC) return; // Play/pause if((g_psCurrent == psPAUSED) || (g_psCurrent == psSTOPPED)) { pMC->Run(); g_psCurrent = psRUNNING; } else { pMC->Pause(); g_psCurrent = psPAUSED; } UpdateMainTitle(); } void StopClip(void) { if ((!pMC) || (!pMS)) return; // Stop and reset postion to beginning if((g_psCurrent == psPAUSED) || (g_psCurrent == psRUNNING)) { LONGLONG pos = 0; pMC->Stop(); g_psCurrent = psSTOPPED; pMS->SetPositions(&pos, AM_SEEKING_AbsolutePositioning , NULL, AM_SEEKING_NoPositioning); // Display the first frame to indicate the reset condition pMC->Pause(); } UpdateMainTitle(); } void OpenClip() { HRESULT hr; // If no filename specified by command line, show open dlg if(g_szFileName[0] == L'\0') { TCHAR szFilename[MAX_PATH]; UpdateMainTitle(); // If no filename was specified on the command line, then our video // window has not been created or made visible. Make our mai