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Very basic example code for playing a video using DirectShow in C++.
#include <windows.h>
#include <Dshow.h>
#include <iostream>
using namespace std;
// Macro to report success or failure, and return on failure (lazy shorthand... bad habit! :-)
#define REPORT_OUTCOME(hr) if (FAILED(hr)) { cout << "failed" << endl; return false; } cout << "success" << endl;
// Data
IGraphBuilder *pGraph = 0; // Filter graph manager
IMediaControl *pControl = 0; // Media control interface
IMediaEvent *pEvent = 0; // Media event interface
// Function prototypes
bool init();
void run();
void clearup();
// Functions
int main()
{
cout << "DirectShow Video Player" << endl;
cout << "-----------------------" << endl << endl;
// Attempt to initialise everything
if (init())
{
// Run the app
run();
// Perform the clearup
clearup();
}
cout << endl << endl << "Finished." << endl;
system("pause");
return 0;
}
bool init()
{
// Attempt to initialise the COM
cout << "Initialising COM... ";
HRESULT hr = CoInitialize(NULL);
REPORT_OUTCOME(hr);
// Create the filter graph manager
cout << "Creating filter graph manager... ";
hr = CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER, IID_IGraphBuilder, (void **)&pGraph);
REPORT_OUTCOME(hr);
// Get addition interfaces for it
cout << "Getting media control interface... ";
hr = pGraph->QueryInterface(IID_IMediaControl, (void **)&pControl);
REPORT_OUTCOME(hr);
cout << "Getting media event interface... ";
hr = pGraph->QueryInterface(IID_IMediaEvent, (void **)&pEvent);
REPORT_OUTCOME(hr);
// Attempt to build the graph for file playback
cout << "Building graph for file playback... ";
hr = pGraph->RenderFile(L"INSERT YOUR VIDEO PATH/FILE HERE", NULL);
REPORT_OUTCOME(hr);
return true;
}
void run()
{
// Attempt to start playing the file
cout << endl << "Starting playback... ";
HRESULT hr = pControl->Run();
if (SUCCEEDED(hr))
{
cout << "running" << endl;
// Block this thread until the video has finish playback
//long evCode = 0;
//pEvent->WaitForCompletion(INFINITE, &evCode);
// Wait for user to press a key to stop
system("pause");
cout << endl << "Playback stopped" << endl << endl;
} else {
cout << "failed" << endl;
}
}
void clearup()
{
// Release our interfaces
cout << "Releasing media control interface... " << endl;
pControl->Release();
cout << "Releasing media event interface... " << endl;
pEvent->Release();
cout << "Releasing filter graph manager... " << endl;
pGraph->Release();
// Shutdown COM
cout << "Shutting down COM... " << endl;
CoUninitialize();
}
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