/*
  * 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(libAVEnumMediaTypes,
     { {&IID_IUnknown,0}, {&IID_IEnumPins,0} })
 DECLARE_ADDREF(libAVEnumMediaTypes)
 DECLARE_RELEASE(libAVEnumMediaTypes)
 
 long WINAPI
 libAVEnumMediaTypes_Next(libAVEnumMediaTypes *this, unsigned long n,
                          AM_MEDIA_TYPE **types, unsigned long *fetched)
 {
     int count = 0;
     dshowdebug("libAVEnumMediaTypes_Next(%p)\n", this);
     if (!types)
         return E_POINTER;
     if (!this->pos && n == 1) {
         if (!IsEqualGUID(&this->type.majortype, &GUID_NULL)) {
             AM_MEDIA_TYPE *type = av_malloc(sizeof(AM_MEDIA_TYPE));
             ff_copy_dshow_media_type(type, &this->type);
             *types = type;
             count = 1;
         }
         this->pos = 1;
     }
     if (fetched)
         *fetched = count;
     if (!count)
         return S_FALSE;
     return S_OK;
 }
 long WINAPI
 libAVEnumMediaTypes_Skip(libAVEnumMediaTypes *this, unsigned long n)
 {
     dshowdebug("libAVEnumMediaTypes_Skip(%p)\n", this);
     if (n) /* Any skip will always fall outside of the only valid type. */
         return S_FALSE;
     return S_OK;
 }
 long WINAPI
 libAVEnumMediaTypes_Reset(libAVEnumMediaTypes *this)
 {
     dshowdebug("libAVEnumMediaTypes_Reset(%p)\n", this);
     this->pos = 0;
     return S_OK;
 }
 long WINAPI
 libAVEnumMediaTypes_Clone(libAVEnumMediaTypes *this, libAVEnumMediaTypes **enums)
 {
     libAVEnumMediaTypes *new;
     dshowdebug("libAVEnumMediaTypes_Clone(%p)\n", this);
     if (!enums)
         return E_POINTER;
     new = libAVEnumMediaTypes_Create(&this->type);
     if (!new)
         return E_OUTOFMEMORY;
     new->pos = this->pos;
     *enums = new;
     return S_OK;
 }
 
 static int
 libAVEnumMediaTypes_Setup(libAVEnumMediaTypes *this, const AM_MEDIA_TYPE *type)
 {
     IEnumPinsVtbl *vtbl = this->vtbl;
     SETVTBL(vtbl, libAVEnumMediaTypes, QueryInterface);
     SETVTBL(vtbl, libAVEnumMediaTypes, AddRef);
     SETVTBL(vtbl, libAVEnumMediaTypes, Release);
     SETVTBL(vtbl, libAVEnumMediaTypes, Next);
     SETVTBL(vtbl, libAVEnumMediaTypes, Skip);
     SETVTBL(vtbl, libAVEnumMediaTypes, Reset);
     SETVTBL(vtbl, libAVEnumMediaTypes, Clone);
 
     if (!type) {
         this->type.majortype = GUID_NULL;
     } else {
         ff_copy_dshow_media_type(&this->type, type);
     }
 
     return 1;
 }
 DECLARE_CREATE(libAVEnumMediaTypes, libAVEnumMediaTypes_Setup(this, type), const AM_MEDIA_TYPE *type)
 DECLARE_DESTROY(libAVEnumMediaTypes, nothing)