webmmux/dllentry.cc

// Copyright (c) 2010 The WebM project authors. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the LICENSE file in the root of the source
// tree. An additional intellectual property rights grant can be found
// in the file PATENTS.  All contributing project authors may
// be found in the AUTHORS file in the root of the source tree.

#include <strmif.h>
#include "cfactory.h"
#include "comreg.h"
#include "webmtypes.h"
#include "webmmuxidl.h"
#include "vorbistypes.h"
#include "graphutil.h"
#include <cassert>
#include <comdef.h>
#include <uuids.h>

static ULONG s_cLock;

namespace WebmMuxLib
{
    extern HMODULE s_hModule = 0;

    HRESULT CreateInstance(
            IClassFactory*,
            IUnknown*,
            const IID&,
            void**);

}  //end namespace WebmMuxLib


static CFactory s_factory(&s_cLock, &WebmMuxLib::CreateInstance);


BOOL APIENTRY DllMain(
    HINSTANCE hModule,
    DWORD  dwReason,
    LPVOID)
{
    switch (dwReason)
    {
        case DLL_PROCESS_ATTACH:
        {
            WebmMuxLib::s_hModule = hModule;
            break;
        }
        case DLL_THREAD_ATTACH:
        case DLL_THREAD_DETACH:
        case DLL_PROCESS_DETACH:
        default:
            break;
    }

    return TRUE;
}



STDAPI DllCanUnloadNow()
{
    return s_cLock ? S_FALSE : S_OK;
}


STDAPI DllGetClassObject(
    const CLSID& clsid,
    const IID& iid,
    void** ppv)
{
    if (clsid == CLSID_WebmMux)
        return s_factory.QueryInterface(iid, ppv);

    return CLASS_E_CLASSNOTAVAILABLE;
}


STDAPI DllUnregisterServer()
{
    const GraphUtil::IFilterMapper2Ptr pMapper(CLSID_FilterMapper2);
    assert(bool(pMapper));

    HRESULT hr = pMapper->UnregisterFilter(
                    &CLSID_LegacyAmFilterCategory,
                    0,
                    CLSID_WebmMux);

    //assert(SUCCEEDED(hr));

    hr = ComReg::UnRegisterCoclass(CLSID_WebmMux);

    return SUCCEEDED(hr) ? S_OK : S_FALSE;
}


STDAPI DllRegisterServer()
{
    std::wstring filename_;

    HRESULT hr = ComReg::ComRegGetModuleFileName(
                    WebmMuxLib::s_hModule,
                    filename_);
    assert(SUCCEEDED(hr));
    assert(!filename_.empty());

    const wchar_t* const filename = filename_.c_str();

#if _DEBUG
    const wchar_t friendlyname[] = L"WebM Muxer Filter (Debug)";
#else
    const wchar_t friendlyname[] = L"WebM Muxer Filter";
#endif

    hr = DllUnregisterServer();
    assert(SUCCEEDED(hr));

    hr = ComReg::RegisterCoclass(
            CLSID_WebmMux,
            friendlyname,
            filename,
            L"Webm.Muxer",
            L"Webm.Muxer.1",
            false,          //not insertable
            false,          //not a control
            ComReg::kBoth,  //DShow filters must support "both"
            GUID_NULL,      //typelib
            0,              //no version specified
            0);             //no toolbox bitmap

    //hr = ComReg::RegisterTypeLibResource(filename, 0);
    //assert(SUCCEEDED(hr));

    const GraphUtil::IFilterMapper2Ptr pMapper(CLSID_FilterMapper2);
    assert(bool(pMapper));

    REGFILTERPINS pins[3];

    //video inpin

    REGFILTERPINS& inpin_v = pins[0];

    inpin_v.strName = 0;              //obsolete
    inpin_v.bRendered = TRUE;  //TODO: correct value?
    inpin_v.bOutput = FALSE;
    inpin_v.bZero = FALSE;
    inpin_v.bMany = FALSE;
    inpin_v.clsConnectsToFilter = 0;  //obsolete
    inpin_v.strConnectsToPin = 0;     //obsolete

    enum { kVideoTypes = 2 };

    const REGPINTYPES inpintypes_v[kVideoTypes] =
    {
        { &MEDIATYPE_Video, &WebmTypes::MEDIASUBTYPE_VP80 },
        { &MEDIATYPE_Video, &WebmTypes::MEDIASUBTYPE_VP90 }
    };

    inpin_v.nMediaTypes = kVideoTypes;
    inpin_v.lpMediaType = inpintypes_v;

    //audio inpin

    REGFILTERPINS& inpin_a = pins[1];

    inpin_a.strName = 0;
    inpin_a.bRendered = TRUE;  //TODO: correct value?
    inpin_a.bOutput = FALSE;
    inpin_a.bZero = FALSE;
    inpin_a.bMany = FALSE;
    inpin_a.clsConnectsToFilter = 0;
    inpin_a.strConnectsToPin = 0;

    enum { kAudioTypes = 2 };

    const REGPINTYPES inpintypes_a[kAudioTypes] =
    {
        //matroska.org:
        { &MEDIATYPE_Audio, &VorbisTypes::MEDIASUBTYPE_Vorbis2 },

        //xiph.org:
        { &MEDIATYPE_Audio, &VorbisTypes::MEDIASUBTYPE_Vorbis }
    };

    inpin_a.nMediaTypes = kAudioTypes;
    inpin_a.lpMediaType = inpintypes_a;

    //stream outpin

    REGFILTERPINS& outpin = pins[2];

    outpin.strName = 0;              //obsolete
    outpin.bRendered = FALSE;
    outpin.bOutput = TRUE;
    outpin.bZero = FALSE;
    outpin.bMany = FALSE;
    outpin.clsConnectsToFilter = 0;  //obsolete
    outpin.strConnectsToPin = 0;     //obsolete

    enum { kOutpinTypes = 1 };

    const REGPINTYPES outpin_types[kOutpinTypes] =
    {
        { &MEDIATYPE_Stream, &WebmTypes::MEDIASUBTYPE_WEBM }
    };

    outpin.nMediaTypes = kOutpinTypes;
    outpin.lpMediaType = outpin_types;

    //pin setup complete

    REGFILTER2 filter;

    filter.dwVersion = 1;
    filter.dwMerit = MERIT_DO_NOT_USE;
    filter.cPins = 3;
    filter.rgPins = pins;

    hr = pMapper->RegisterFilter(
            CLSID_WebmMux,
            friendlyname,
            0,
            &CLSID_LegacyAmFilterCategory,
            0,
            &filter);

    return hr;
}