git.sesse.net Git - vlc/blob - modules/access/dshow/crossbar.cpp

   1 /*****************************************************************************
   2  * crossbar.c : DirectShow access module for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2002 VideoLAN
   5  * $Id$
   6  *
   7  * Author: Damien Fouilleul <damien dot fouilleul at laposte dot net>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #include <stdlib.h>
  28 #include <stdio.h>
  29 #include <string.h>
  30
  31 #include <vlc/vlc.h>
  32 #include <vlc/input.h>
  33 #include <vlc/vout.h>
  34
  35 #ifndef _MSC_VER
  36     /* Work-around a bug in w32api-2.5 */
  37 #   define QACONTAINERFLAGS QACONTAINERFLAGS_SOMETHINGELSE
  38 #endif
  39
  40 #include "common.h"
  41
  42 /*****************************************************************************
  43  * DeleteCrossbarRoutes
  44  *****************************************************************************/
  45 void DeleteCrossbarRoutes( access_sys_t *p_sys )
  46 {
  47     /* Remove crossbar filters from graph */
  48     for( int i = 0; i < p_sys->i_crossbar_route_depth; i++ )
  49     {
  50         p_sys->crossbar_routes[i].pXbar->Release();
  51     }
  52     p_sys->i_crossbar_route_depth = 0;
  53 }
  54
  55 /*****************************************************************************
  56  * RouteCrossbars (Does not AddRef the returned *Pin)
  57  *****************************************************************************/
  58 static HRESULT GetCrossbarIPinAtIndex( IAMCrossbar *pXbar, LONG PinIndex,
  59                                        BOOL IsInputPin, IPin ** ppPin )
  60 {
  61     LONG         cntInPins, cntOutPins;
  62     IPin        *pP = 0;
  63     IBaseFilter *pFilter = NULL;
  64     IEnumPins   *pins=0;
  65     ULONG        n;
  66
  67     if( !pXbar || !ppPin ) return E_POINTER;
  68
  69     *ppPin = 0;
  70
  71     if( S_OK != pXbar->get_PinCounts(&cntOutPins, &cntInPins) ) return E_FAIL;
  72
  73     LONG TrueIndex = IsInputPin ? PinIndex : PinIndex + cntInPins;
  74
  75     if( pXbar->QueryInterface(IID_IBaseFilter, (void **)&pFilter) == S_OK )
  76     {
  77         if( SUCCEEDED(pFilter->EnumPins(&pins)) )
  78         {
  79             LONG i = 0;
  80             while( pins->Next(1, &pP, &n) == S_OK )
  81             {
  82                 pP->Release();
  83                 if( i == TrueIndex )
  84                 {
  85                     *ppPin = pP;
  86                     break;
  87                 }
  88                 i++;
  89             }
  90             pins->Release();
  91         }
  92         pFilter->Release();
  93     }
  94
  95     return *ppPin ? S_OK : E_FAIL;
  96 }
  97
  98 /*****************************************************************************
  99  * GetCrossbarIndexFromIPin: Find corresponding index of an IPin on a crossbar
 100  *****************************************************************************/
 101 static HRESULT GetCrossbarIndexFromIPin( IAMCrossbar * pXbar, LONG * PinIndex,
 102                                          BOOL IsInputPin, IPin * pPin )
 103 {
 104     LONG         cntInPins, cntOutPins;
 105     IPin        *pP = 0;
 106     IBaseFilter *pFilter = NULL;
 107     IEnumPins   *pins = 0;
 108     ULONG        n;
 109     BOOL         fOK = FALSE;
 110
 111     if(!pXbar || !PinIndex || !pPin )
 112         return E_POINTER;
 113
 114     if( S_OK != pXbar->get_PinCounts(&cntOutPins, &cntInPins) )
 115         return E_FAIL;
 116
 117     if( pXbar->QueryInterface(IID_IBaseFilter, (void **)&pFilter) == S_OK )
 118     {
 119         if( SUCCEEDED(pFilter->EnumPins(&pins)) )
 120         {
 121             LONG i=0;
 122
 123             while( pins->Next(1, &pP, &n) == S_OK )
 124             {
 125                 pP->Release();
 126                 if( pPin == pP )
 127                 {
 128                     *PinIndex = IsInputPin ? i : i - cntInPins;
 129                     fOK = TRUE;
 130                     break;
 131                 }
 132                 i++;
 133             }
 134             pins->Release();
 135         }
 136         pFilter->Release();
 137     }
 138
 139     return fOK ? S_OK : E_FAIL;
 140 }
 141
 142 /*****************************************************************************
 143  * FindCrossbarRoutes
 144  *****************************************************************************/
 145 HRESULT FindCrossbarRoutes( vlc_object_t *p_this, access_sys_t *p_sys,
 146                             IPin *p_input_pin, LONG physicalType, int depth )
 147 {
 148     HRESULT result = S_FALSE;
 149
 150     IPin *p_output_pin;
 151     if( FAILED(p_input_pin->ConnectedTo(&p_output_pin)) ) return S_FALSE;
 152
 153     // It is connected, so now find out if the filter supports IAMCrossbar
 154     PIN_INFO pinInfo;
 155     if( FAILED(p_output_pin->QueryPinInfo(&pinInfo)) ||
 156         PINDIR_OUTPUT != pinInfo.dir )
 157     {
 158         p_output_pin->Release ();
 159         return S_FALSE;
 160     }
 161
 162     IAMCrossbar *pXbar=0;
 163     if( FAILED(pinInfo.pFilter->QueryInterface(IID_IAMCrossbar,
 164                                                (void **)&pXbar)) )
 165     {
 166         pinInfo.pFilter->Release();
 167         p_output_pin->Release ();
 168         return S_FALSE;
 169     }
 170
 171     LONG inputPinCount, outputPinCount;
 172     if( FAILED(pXbar->get_PinCounts(&outputPinCount, &inputPinCount)) )
 173     {
 174         pXbar->Release();
 175         pinInfo.pFilter->Release();
 176         p_output_pin->Release ();
 177         return S_FALSE;
 178     }
 179
 180     LONG inputPinIndexRelated, outputPinIndexRelated;
 181     LONG inputPinPhysicalType, outputPinPhysicalType;
 182     LONG inputPinIndex, outputPinIndex;
 183     if( FAILED(GetCrossbarIndexFromIPin( pXbar, &outputPinIndex,
 184                                          FALSE, p_output_pin )) ||
 185         FAILED(pXbar->get_CrossbarPinInfo( FALSE, outputPinIndex,
 186                                            &outputPinIndexRelated,
 187                                            &outputPinPhysicalType )) )
 188     {
 189         pXbar->Release();
 190         pinInfo.pFilter->Release();
 191         p_output_pin->Release ();
 192         return S_FALSE;
 193     }
 194
 195     //
 196     // for all input pins
 197     //
 198     for( inputPinIndex = 0; S_OK != result && inputPinIndex < inputPinCount;
 199          inputPinIndex++ )
 200     {
 201         if( FAILED(pXbar->get_CrossbarPinInfo( TRUE,  inputPinIndex,
 202                 &inputPinIndexRelated, &inputPinPhysicalType )) ) continue;
 203
 204         // Is the pin a video pin?
 205         if( inputPinPhysicalType != physicalType ) continue;
 206
 207         // Can we route it?
 208         if( FAILED(pXbar->CanRoute(outputPinIndex, inputPinIndex)) ) continue;
 209
 210         IPin *pPin;
 211         if( FAILED(GetCrossbarIPinAtIndex( pXbar, inputPinIndex,
 212                                            TRUE, &pPin)) ) continue;
 213
 214         result = FindCrossbarRoutes( p_this, p_sys, pPin,
 215                                      physicalType, depth+1 );
 216
 217         if( S_OK == result || (S_FALSE == result &&
 218             physicalType == inputPinPhysicalType &&
 219             (p_sys->i_crossbar_route_depth = depth+1) < MAX_CROSSBAR_DEPTH) )
 220         {
 221             // hold on crossbar
 222             pXbar->AddRef();
 223
 224             // remember crossbar route
 225             p_sys->crossbar_routes[depth].pXbar = pXbar;
 226             p_sys->crossbar_routes[depth].VideoInputIndex = inputPinIndex;
 227             p_sys->crossbar_routes[depth].VideoOutputIndex = outputPinIndex;
 228             p_sys->crossbar_routes[depth].AudioInputIndex = inputPinIndexRelated;
 229             p_sys->crossbar_routes[depth].AudioOutputIndex = outputPinIndexRelated;
 230
 231             msg_Dbg( p_this, "Crossbar at depth %d, Found Route For "
 232                      "ouput %ld (type %ld) to input %ld (type %ld)", depth,
 233                      outputPinIndex, outputPinPhysicalType, inputPinIndex,
 234                      inputPinPhysicalType );
 235
 236             result = S_OK;
 237         }
 238     }
 239
 240     pXbar->Release();
 241     pinInfo.pFilter->Release();
 242     p_output_pin->Release ();
 243
 244     return result;
 245 }