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/**
* Copyright 2013 JogAmp Community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of JogAmp Community.
*/
#include "ffmpeg_dshow.h"
#ifdef _WIN32
#include <stdio.h>
#include <string.h>
#include <dshow.h>
#include <tchar.h>
static HRESULT EnumerateDevices(REFGUID category, IEnumMoniker **ppEnum)
{
// Create the System Device Enumerator.
ICreateDevEnum *pDevEnum;
void *pv = NULL;
HRESULT hr = CoCreateInstance(&CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC_SERVER, &IID_ICreateDevEnum, (void**)&pDevEnum);
if (SUCCEEDED(hr)) {
// Create an enumerator for the category.
hr = pDevEnum->lpVtbl->CreateClassEnumerator(pDevEnum, category, ppEnum,0);
if (hr == S_FALSE)
{
hr = VFW_E_NOT_FOUND; // The category is empty. Treat as an error.
}
pDevEnum->lpVtbl->Release(pDevEnum);
}
return hr;
}
static void getBSTRChars(BSTR bstr, char *pDest, int destLen) {
#ifdef UNICODE
_sntprintf(pDest, destLen, _T("%s"), bstr);
#else
_sntprintf(pDest, destLen, _T("%S"), bstr);
#endif
}
static int GetDeviceInformation(IEnumMoniker *pEnum, int verbose, int devIdx,
char *pDescr, int descrSize,
char *pName, int nameSize,
char *pPath, int pathSize, int *pWaveID) {
IMoniker *pMoniker = NULL;
int i=0;
int res = devIdx >= 0 ? -1 : 0;
if( NULL != pDescr ) {
*pDescr=0;
}
if( NULL != pName ) {
*pName=0;
}
if( NULL != pPath ) {
*pPath=0;
}
if( NULL != pWaveID ) {
*pWaveID=0;
}
while (pEnum->lpVtbl->Next(pEnum, 1, &pMoniker, NULL) == S_OK) {
IPropertyBag *pPropBag;
HRESULT hr;
hr = pMoniker->lpVtbl->BindToStorage(pMoniker, 0, 0, &IID_IPropertyBag, (void**)&pPropBag);
if (FAILED(hr)) {
if( verbose ) {
fprintf(stderr, "DShowParser: Dev[%d]: bind failed ...\n", i);
}
pMoniker->lpVtbl->Release(pMoniker);
continue;
}
VARIANT var;
VariantInit(&var);
// Get description or friendly name.
hr = pPropBag->lpVtbl->Read(pPropBag, L"Description", &var, 0);
if (SUCCEEDED(hr)) {
if( i == devIdx && NULL != pDescr ) {
res = 0;
getBSTRChars(var.bstrVal, pDescr, descrSize);
}
if( verbose ) {
fprintf(stderr, "DShowParser: Dev[%d]: Descr %S\n", i, var.bstrVal);
}
VariantClear(&var);
} else if( verbose ) {
fprintf(stderr, "DShowParser: Dev[%d]: cannot read Descr..\n", i);
}
hr = pPropBag->lpVtbl->Read(pPropBag, L"FriendlyName", &var, 0);
if (SUCCEEDED(hr)) {
if( i == devIdx && NULL != pName ) {
res = 0;
getBSTRChars(var.bstrVal, pName, nameSize);
}
if( verbose ) {
fprintf(stderr, "DShowParser: Dev[%d]: Name %S\n", i, var.bstrVal);
}
VariantClear(&var);
} else if( verbose ) {
fprintf(stderr, "DShowParser: Dev[%d]: cannot read Name..\n", i);
}
hr = pPropBag->lpVtbl->Write(pPropBag, L"FriendlyName", &var);
// WaveInID applies only to audio capture devices.
hr = pPropBag->lpVtbl->Read(pPropBag, L"WaveInID", &var, 0);
if (SUCCEEDED(hr)) {
if( i == devIdx && NULL != pWaveID ) {
res = 0;
*pWaveID=(int)var.lVal;
}
if( verbose ) {
fprintf(stderr, "DShowParser: Dev[%d]: WaveInID %d\n", i, var.lVal);
}
VariantClear(&var);
}
hr = pPropBag->lpVtbl->Read(pPropBag, L"DevicePath", &var, 0);
if (SUCCEEDED(hr)) {
if( i == devIdx && NULL != pPath ) {
res = 0;
getBSTRChars(var.bstrVal, pPath, pathSize);
}
if( verbose ) {
fprintf(stderr, "DShowParser: Dev[%d]: Path %S\n", i, var.bstrVal);
}
VariantClear(&var);
}
pPropBag->lpVtbl->Release(pPropBag);
pMoniker->lpVtbl->Release(pMoniker);
if( devIdx >= 0 && i == devIdx ) {
break; // done!
}
i++;
}
return res;
}
int findDShowVideoDevice(char * dest, int destSize, int devIdx, int verbose) {
int res = -1;
HRESULT hr = CoInitializeEx(NULL, COINIT_MULTITHREADED);
if (SUCCEEDED(hr)) {
IEnumMoniker *pEnum;
hr = EnumerateDevices(&CLSID_VideoInputDeviceCategory, &pEnum);
if (SUCCEEDED(hr)) {
res = GetDeviceInformation(pEnum, verbose, devIdx, NULL /* pDescr */, 0, dest, destSize, NULL /* pPath */, 0, NULL /* pWaveID */);
pEnum->lpVtbl->Release(pEnum);
if( verbose ) {
fprintf(stderr, "DShowParser: Get VideoInputDevice: res %d, '%s'\n", res, dest);
}
} else if( verbose ) {
fprintf(stderr, "DShowParser: Get VideoInputDevice failed\n");
}
/**
hr = EnumerateDevices(&CLSID_AudioInputDeviceCategory, &pEnum);
if (SUCCEEDED(hr)) {
res = GetDeviceInformation(pEnum, verbose, devIdx, NULL, 0, NULL, 0, NULL, 0, NULL);
pEnum->lpVtbl->Release(pEnum);
} else if( verbose ) {
fprintf(stderr, "DShowParser: Get AudioInputDevice failed\n");
} */
CoUninitialize();
} else if( verbose ) {
fprintf(stderr, "DShowParser: CoInit failed\n");
}
return res;
}
#else
int findDShowVideoDevice(char * dest, int destSize, int devIdx, int verbose) {
return -1;
}
#endif
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