loader/dshow/graph.c

   1 /*
   2  * Implemention of FilterGraph. Based on allocator.c.
   3  * Copyright 2010 Steinar H. Gunderson
   4  *
   5  * This file is part of MPlayer.
   6  *
   7  * MPlayer is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * MPlayer is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Modified for use with MPlayer, detailed changelog at
  22  * http://svn.mplayerhq.hu/mplayer/trunk/
  23  */
  24
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27
  28 #include "config.h"
  29 #include "loader/com.h"
  30 #include "loader/dshow/graph.h"
  31 #include "loader/wine/winerror.h"
  32
  33 // How many FilterGraph objects exist.
  34 // Used for knowing when to register and unregister the class in COM.
  35 static int GraphKeeper = 0;
  36
  37 static long FilterGraph_CreateGraph(GUID* clsid, const GUID* iid, void** ppv)
  38 {
  39     IUnknown* p;
  40     int result;
  41     if (!ppv)
  42         return -1;
  43     *ppv = 0;
  44     if (memcmp(clsid, &CLSID_FilterGraph, sizeof(*clsid)))
  45         return -1;
  46
  47     p = (IUnknown*) FilterGraphCreate();
  48     result = p->vt->QueryInterface(p, iid, ppv);
  49     p->vt->Release(p);
  50
  51     return result;
  52 }
  53
  54 static void FilterGraph_Destroy(FilterGraph* This)
  55 {
  56     Debug printf("FilterGraph_Destroy(%p) called  (%d, %d)\n", This, This->refcount, GraphKeeper);
  57 #ifdef WIN32_LOADER
  58     if (--GraphKeeper == 0)
  59         UnregisterComClass(&CLSID_FilterGraph, FilterGraph_CreateGraph);
  60 #endif
  61     free(This->vt);
  62     free(This);
  63 }
  64
  65 HRESULT STDCALL FilterGraph_AddFilter(FilterGraph* This,
  66                                       IBaseFilter* pFilter,
  67                                       unsigned short* pName)
  68 {
  69     Debug printf("FilterGraph_AddFilter(%p) called\n", This);
  70     return E_NOTIMPL;
  71 }
  72
  73 HRESULT STDCALL FilterGraph_RemoveFilter(FilterGraph* This, IBaseFilter* pFilter)
  74 {
  75     Debug printf("FilterGraph_RemoveFilter(%p) called\n", This);
  76     return E_NOTIMPL;
  77 }
  78
  79 HRESULT STDCALL FilterGraph_EnumFilters(FilterGraph* This, IEnumFilters** ppEnum)
  80 {
  81     Debug printf("FilterGraph_EnumFilters(%p) called\n", This);
  82     return E_NOTIMPL;
  83 }
  84
  85 HRESULT STDCALL FilterGraph_FindFilterByName(FilterGraph* This,
  86                                              unsigned short* pName,
  87                                              IBaseFilter** ppFilter)
  88 {
  89     Debug printf("FilterGraph_FindFilterByName(%p) called\n", This);
  90     return E_NOTIMPL;
  91 }
  92
  93 HRESULT STDCALL FilterGraph_ConnectDirect(FilterGraph* This,
  94                                           IPin* ppinOut,
  95                                           IPin* ppinIn,
  96                                           const AM_MEDIA_TYPE* pmt)
  97 {
  98     Debug printf("FilterGraph_ConnectDirect(%p) called\n", This);
  99     return E_NOTIMPL;
 100 }
 101
 102 HRESULT STDCALL FilterGraph_Reconnect(FilterGraph* This, IPin* ppin)
 103 {
 104     Debug printf("FilterGraph_Reconnect(%p) called\n", This);
 105     return E_NOTIMPL;
 106 }
 107
 108 HRESULT STDCALL FilterGraph_Disconnect(FilterGraph* This, IPin* ppin)
 109 {
 110     Debug printf("FilterGraph_Disconnect(%p) called\n", This);
 111     return E_NOTIMPL;
 112 }
 113
 114 HRESULT STDCALL FilterGraph_SetDefaultSyncSource(FilterGraph* This)
 115 {
 116     Debug printf("FilterGraph_SetDefaultSyncSource(%p) called\n", This);
 117     return E_NOTIMPL;
 118 }
 119
 120 IMPLEMENT_IUNKNOWN(FilterGraph)
 121
 122 FilterGraph* FilterGraphCreate()
 123 {
 124     FilterGraph* This = calloc(1, sizeof(*This));
 125
 126     if (!This)
 127         return NULL;
 128
 129     Debug printf("FilterGraphCreate() called -> %p\n", This);
 130
 131     This->refcount = 1;
 132
 133     This->vt = calloc(1, sizeof(*This->vt));
 134
 135     if (!This->vt) {
 136         free(This);
 137         return NULL;
 138     }
 139
 140     This->vt->QueryInterface       = FilterGraph_QueryInterface;
 141     This->vt->AddRef               = FilterGraph_AddRef;
 142     This->vt->Release              = FilterGraph_Release;
 143
 144     This->vt->AddFilter            = FilterGraph_AddFilter;
 145     This->vt->RemoveFilter         = FilterGraph_RemoveFilter;
 146     This->vt->EnumFilters          = FilterGraph_EnumFilters;
 147     This->vt->FindFilterByName     = FilterGraph_FindFilterByName;
 148     This->vt->ConnectDirect        = FilterGraph_ConnectDirect;
 149     This->vt->Reconnect            = FilterGraph_Reconnect;
 150     This->vt->Disconnect           = FilterGraph_Disconnect;
 151     This->vt->SetDefaultSyncSource = FilterGraph_SetDefaultSyncSource;
 152
 153     This->interfaces[0] = IID_IUnknown;
 154     This->interfaces[1] = IID_IFilterGraph;
 155
 156 #ifdef WIN32_LOADER
 157     if (GraphKeeper++ == 0)
 158         RegisterComClass(&CLSID_FilterGraph, FilterGraph_CreateGraph);
 159 #endif
 160
 161     return This;
 162 }
 163