text: /*
   * DirectShow capture interface
   * Copyright (c) 2010 Ramiro Polla
   *
   * This file is part of FFmpeg.
   *
   * FFmpeg is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * FFmpeg is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with FFmpeg; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
   */
  
  #include "dshow_capture.h"
  
  DECLARE_QUERYINTERFACE(libAVEnumPins,
      { {&IID_IUnknown,0}, {&IID_IEnumPins,0} })
  DECLARE_ADDREF(libAVEnumPins)
  DECLARE_RELEASE(libAVEnumPins)
  
  long WINAPI
  libAVEnumPins_Next(libAVEnumPins *this, unsigned long n, IPin **pins,
                     unsigned long *fetched)
  {
      int count = 0;
      dshowdebug("libAVEnumPins_Next(%p)\n", this);
      if (!pins)
          return E_POINTER;
      if (!this->pos && n == 1) {
          libAVPin_AddRef(this->pin);
          *pins = (IPin *) this->pin;
          count = 1;
          this->pos = 1;
      }
      if (fetched)
          *fetched = count;
      if (!count)
          return S_FALSE;
      return S_OK;
  }
  long WINAPI
  libAVEnumPins_Skip(libAVEnumPins *this, unsigned long n)
  {
      dshowdebug("libAVEnumPins_Skip(%p)\n", this);
      if (n) /* Any skip will always fall outside of the only valid pin. */
          return S_FALSE;
      return S_OK;
  }
  long WINAPI
  libAVEnumPins_Reset(libAVEnumPins *this)
  {
      dshowdebug("libAVEnumPins_Reset(%p)\n", this);
      this->pos = 0;
      return S_OK;
  }
  long WINAPI
  libAVEnumPins_Clone(libAVEnumPins *this, libAVEnumPins **pins)
  {
      libAVEnumPins *new;
      dshowdebug("libAVEnumPins_Clone(%p)\n", this);
      if (!pins)
          return E_POINTER;
      new = libAVEnumPins_Create(this->pin, this->filter);
      if (!new)
          return E_OUTOFMEMORY;
      new->pos = this->pos;
      *pins = new;
      return S_OK;
  }
  
  static int
  libAVEnumPins_Setup(libAVEnumPins *this, libAVPin *pin, libAVFilter *filter)
  {
      IEnumPinsVtbl *vtbl = this->vtbl;
      SETVTBL(vtbl, libAVEnumPins, QueryInterface);
      SETVTBL(vtbl, libAVEnumPins, AddRef);
      SETVTBL(vtbl, libAVEnumPins, Release);
      SETVTBL(vtbl, libAVEnumPins, Next);
      SETVTBL(vtbl, libAVEnumPins, Skip);
      SETVTBL(vtbl, libAVEnumPins, Reset);
      SETVTBL(vtbl, libAVEnumPins, Clone);
  
      this->pin = pin;
      this->filter = filter;
      libAVFilter_AddRef(this->filter);
  
      return 1;
  }
  static int
  libAVEnumPins_Cleanup(libAVEnumPins *this)
  {
      libAVFilter_Release(this->filter);
      return 1;
  }
  DECLARE_CREATE(libAVEnumPins, libAVEnumPins_Setup(this, pin, filter),
                 libAVPin *pin, libAVFilter *filter)
  DECLARE_DESTROY(libAVEnumPins, libAVEnumPins_Cleanup)
  