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 the VideoLAN team
   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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <vlc_common.h>
  33 #include <vlc_vout.h>
  34
  35 #ifndef _MSC_VER
  36     /* Work-around a bug in w32api-2.5 */
  37 #   define QACONTAINERFLAGS QACONTAINERFLAGS_ANOTHERSOMETHINGELSE
  38 #endif
  39
  40 #include "common.h"
  41
  42
  43
  44 // Helper function to associate a crossbar pin name with the type.
  45 static const char * GetPhysicalPinName(long lType)
  46 {
  47     switch (lType)
  48     {
  49     case PhysConn_Video_Tuner:            return "Video Tuner";
  50     case PhysConn_Video_Composite:        return "Video Composite";
  51     case PhysConn_Video_SVideo:           return "S-Video";
  52     case PhysConn_Video_RGB:              return "Video RGB";
  53     case PhysConn_Video_YRYBY:            return "Video YRYBY";
  54     case PhysConn_Video_SerialDigital:    return "Video Serial Digital";
  55     case PhysConn_Video_ParallelDigital:  return "Video Parallel Digital";
  56     case PhysConn_Video_SCSI:             return "Video SCSI";
  57     case PhysConn_Video_AUX:              return "Video AUX";
  58     case PhysConn_Video_1394:             return "Video 1394";
  59     case PhysConn_Video_USB:              return "Video USB";
  60     case PhysConn_Video_VideoDecoder:     return "Video Decoder";
  61     case PhysConn_Video_VideoEncoder:     return "Video Encoder";
  62
  63     case PhysConn_Audio_Tuner:            return "Audio Tuner";
  64     case PhysConn_Audio_Line:             return "Audio Line";
  65     case PhysConn_Audio_Mic:              return "Audio Microphone";
  66     case PhysConn_Audio_AESDigital:       return "Audio AES/EBU Digital";
  67     case PhysConn_Audio_SPDIFDigital:     return "Audio S/PDIF";
  68     case PhysConn_Audio_SCSI:             return "Audio SCSI";
  69     case PhysConn_Audio_AUX:              return "Audio AUX";
  70     case PhysConn_Audio_1394:             return "Audio 1394";
  71     case PhysConn_Audio_USB:              return "Audio USB";
  72     case PhysConn_Audio_AudioDecoder:     return "Audio Decoder";
  73
  74     default:                              return "Unknown Type";
  75     }
  76 }
  77 /*****************************************************************************
  78  * DeleteCrossbarRoutes
  79  *****************************************************************************/
  80 void DeleteCrossbarRoutes( access_sys_t *p_sys )
  81 {
  82     /* Remove crossbar filters from graph */
  83     for( int i = 0; i < p_sys->i_crossbar_route_depth; i++ )
  84     {
  85         p_sys->crossbar_routes[i].pXbar->Release();
  86     }
  87     p_sys->i_crossbar_route_depth = 0;
  88 }
  89
  90 /*****************************************************************************
  91  * RouteCrossbars (Does not AddRef the returned *Pin)
  92  *****************************************************************************/
  93 static HRESULT GetCrossbarIPinAtIndex( IAMCrossbar *pXbar, LONG PinIndex,
  94                                        BOOL IsInputPin, IPin ** ppPin )
  95 {
  96     LONG         cntInPins, cntOutPins;
  97     IPin        *pP = NULL;
  98     IBaseFilter *pFilter = NULL;
  99     IEnumPins   *pins = NULL;
 100     ULONG        n;
 101
 102     if( !pXbar || !ppPin ) return E_POINTER;
 103
 104     *ppPin = 0;
 105
 106     if( S_OK != pXbar->get_PinCounts(&cntOutPins, &cntInPins) ) return E_FAIL;
 107
 108     LONG TrueIndex = IsInputPin ? PinIndex : PinIndex + cntInPins;
 109
 110     if( pXbar->QueryInterface(IID_IBaseFilter, (void **)&pFilter) == S_OK )
 111     {
 112         if( SUCCEEDED(pFilter->EnumPins(&pins)) )
 113         {
 114             LONG i = 0;
 115             while( pins->Next(1, &pP, &n) == S_OK )
 116             {
 117                 pP->Release();
 118                 if( i == TrueIndex )
 119                 {
 120                     *ppPin = pP;
 121                     break;
 122                 }
 123                 i++;
 124             }
 125             pins->Release();
 126         }
 127         pFilter->Release();
 128     }
 129
 130     return *ppPin ? S_OK : E_FAIL;
 131 }
 132
 133 /*****************************************************************************
 134  * GetCrossbarIndexFromIPin: Find corresponding index of an IPin on a crossbar
 135  *****************************************************************************/
 136 static HRESULT GetCrossbarIndexFromIPin( IAMCrossbar * pXbar, LONG * PinIndex,
 137                                          BOOL IsInputPin, IPin * pPin )
 138 {
 139     LONG         cntInPins, cntOutPins;
 140     IPin        *pP = NULL;
 141     IBaseFilter *pFilter = NULL;
 142     IEnumPins   *pins = NULL;
 143     ULONG        n;
 144     BOOL         fOK = FALSE;
 145
 146     if(!pXbar || !PinIndex || !pPin )
 147         return E_POINTER;
 148
 149     if( S_OK != pXbar->get_PinCounts(&cntOutPins, &cntInPins) )
 150         return E_FAIL;
 151
 152     if( pXbar->QueryInterface(IID_IBaseFilter, (void **)&pFilter) == S_OK )
 153     {
 154         if( SUCCEEDED(pFilter->EnumPins(&pins)) )
 155         {
 156             LONG i=0;
 157
 158             while( pins->Next(1, &pP, &n) == S_OK )
 159             {
 160                 pP->Release();
 161                 if( pPin == pP )
 162                 {
 163                     *PinIndex = IsInputPin ? i : i - cntInPins;
 164                     fOK = TRUE;
 165                     break;
 166                 }
 167                 i++;
 168             }
 169             pins->Release();
 170         }
 171         pFilter->Release();
 172     }
 173
 174     return fOK ? S_OK : E_FAIL;
 175 }
 176
 177 /*****************************************************************************
 178  * FindCrossbarRoutes
 179  *****************************************************************************/
 180 HRESULT FindCrossbarRoutes( vlc_object_t *p_this, access_sys_t *p_sys,
 181                             IPin *p_input_pin, LONG physicalType, int depth )
 182 {
 183     HRESULT result = S_FALSE;
 184
 185     IPin *p_output_pin;
 186     if( FAILED(p_input_pin->ConnectedTo(&p_output_pin)) ) return S_FALSE;
 187
 188     // It is connected, so now find out if the filter supports IAMCrossbar
 189     PIN_INFO pinInfo;
 190     if( FAILED(p_output_pin->QueryPinInfo(&pinInfo)) ||
 191         PINDIR_OUTPUT != pinInfo.dir )
 192     {
 193         p_output_pin->Release ();
 194         return S_FALSE;
 195     }
 196
 197     IAMCrossbar *pXbar = NULL;
 198     if( FAILED(pinInfo.pFilter->QueryInterface(IID_IAMCrossbar,
 199                                                (void **)&pXbar)) )
 200     {
 201         pinInfo.pFilter->Release();
 202         p_output_pin->Release ();
 203         return S_FALSE;
 204     }
 205
 206     LONG inputPinCount, outputPinCount;
 207     if( FAILED(pXbar->get_PinCounts(&outputPinCount, &inputPinCount)) )
 208     {
 209         pXbar->Release();
 210         pinInfo.pFilter->Release();
 211         p_output_pin->Release ();
 212         return S_FALSE;
 213     }
 214
 215     LONG inputPinIndexRelated, outputPinIndexRelated;
 216     LONG inputPinPhysicalType = 0, outputPinPhysicalType;
 217     LONG inputPinIndex = 0, outputPinIndex;
 218     if( FAILED(GetCrossbarIndexFromIPin( pXbar, &outputPinIndex,
 219                                          FALSE, p_output_pin )) ||
 220         FAILED(pXbar->get_CrossbarPinInfo( FALSE, outputPinIndex,
 221                                            &outputPinIndexRelated,
 222                                            &outputPinPhysicalType )) )
 223     {
 224         pXbar->Release();
 225         pinInfo.pFilter->Release();
 226         p_output_pin->Release ();
 227         return S_FALSE;
 228     }
 229
 230     /*
 231     ** if physical type is 0, then use default/existing route to physical connector
 232     */
 233     if( physicalType == 0 )
 234     {
 235         /* use following as default connector type if we fail to find an existing route */
 236         physicalType = PhysConn_Video_Tuner;
 237         if( SUCCEEDED(pXbar->get_IsRoutedTo(outputPinIndex, &inputPinIndex)) )
 238         {
 239
 240             if( SUCCEEDED( pXbar->get_CrossbarPinInfo( TRUE,  inputPinIndex,
 241                            &inputPinIndexRelated, &inputPinPhysicalType )) )
 242             {
 243                 // remember connector type
 244                 physicalType = inputPinPhysicalType;
 245
 246                 msg_Dbg( p_this, "found existing route for output %ld (type %s) to input %ld (type %s)",
 247                          outputPinIndex, GetPhysicalPinName( outputPinPhysicalType ),
 248                          inputPinIndex, GetPhysicalPinName( inputPinPhysicalType ) );
 249
 250                 // fall through to for loop, note 'inputPinIndex' is set to the pin we are looking for
 251                 // hence, loop iteration should not wind back
 252
 253             }
 254         }
 255         else {
 256             // reset to first pin for complete loop iteration
 257             inputPinIndex = 0;
 258         }
 259     }
 260
 261     //
 262     // for all input pins
 263     //
 264     for( /* inputPinIndex has been set */ ; (S_OK != result) && (inputPinIndex < inputPinCount); ++inputPinIndex )
 265     {
 266         if( FAILED(pXbar->get_CrossbarPinInfo( TRUE,  inputPinIndex,
 267             &inputPinIndexRelated, &inputPinPhysicalType )) ) continue;
 268
 269         // Is this pin matching required connector physical type?
 270         if( inputPinPhysicalType != physicalType ) continue;
 271
 272         // Can we route it?
 273         if( FAILED(pXbar->CanRoute(outputPinIndex, inputPinIndex)) ) continue;
 274
 275
 276         IPin *pPin;
 277         if( FAILED(GetCrossbarIPinAtIndex( pXbar, inputPinIndex,
 278                                            TRUE, &pPin)) ) continue;
 279
 280         result = FindCrossbarRoutes( p_this, p_sys, pPin,
 281                                      physicalType, depth+1 );
 282
 283         if( S_OK == result || (S_FALSE == result &&
 284             physicalType == inputPinPhysicalType &&
 285             (p_sys->i_crossbar_route_depth = depth+1) < MAX_CROSSBAR_DEPTH) )
 286         {
 287             // hold on crossbar, will be released when graph is destroyed
 288             pXbar->AddRef();
 289
 290             // remember crossbar route
 291             p_sys->crossbar_routes[depth].pXbar = pXbar;
 292             p_sys->crossbar_routes[depth].VideoInputIndex = inputPinIndex;
 293             p_sys->crossbar_routes[depth].VideoOutputIndex = outputPinIndex;
 294             p_sys->crossbar_routes[depth].AudioInputIndex = inputPinIndexRelated;
 295             p_sys->crossbar_routes[depth].AudioOutputIndex = outputPinIndexRelated;
 296
 297             msg_Dbg( p_this, "crossbar at depth %d, found route for "
 298                      "output %ld (type %s) to input %ld (type %s)", depth,
 299                      outputPinIndex, GetPhysicalPinName( outputPinPhysicalType ),
 300                      inputPinIndex, GetPhysicalPinName( inputPinPhysicalType ) );
 301
 302             result = S_OK;
 303         }
 304     }
 305
 306     pXbar->Release();
 307     pinInfo.pFilter->Release();
 308     p_output_pin->Release ();
 309
 310     return result;
 311 }