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/*

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 * DirectShow capture interface

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 * Copyright (c) 2010 Ramiro Polla

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 *

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 * This file is part of FFmpeg.

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 *

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 * FFmpeg is free software; you can redistribute it and/or

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 * modify it under the terms of the GNU Lesser General Public

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 * License as published by the Free Software Foundation; either

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 * version 2.1 of the License, or (at your option) any later version.

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 *

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 * FFmpeg is distributed in the hope that it will be useful,

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 * but WITHOUT ANY WARRANTY; without even the implied warranty of

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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

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 * Lesser General Public License for more details.

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 *

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 * You should have received a copy of the GNU Lesser General Public

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 * License along with FFmpeg; if not, write to the Free Software

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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

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 */

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#include "dshow_capture.h"

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DECLARE_QUERYINTERFACE(libAVEnumPins,

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    { {&IID_IUnknown,0}, {&IID_IEnumPins,0} })

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DECLARE_ADDREF(libAVEnumPins)

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DECLARE_RELEASE(libAVEnumPins)

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long WINAPI

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libAVEnumPins_Next(libAVEnumPins *this, unsigned long n, IPin **pins,

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                   unsigned long *fetched)

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{

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    int count = 0;

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    dshowdebug("libAVEnumPins_Next(%p)\n", this);

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    if (!pins)

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        return E_POINTER;

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    if (!this->pos && n == 1) {

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        libAVPin_AddRef(this->pin);

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        *pins = (IPin *) this->pin;

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        count = 1;

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        this->pos = 1;

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    }

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    if (fetched)

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        *fetched = count;

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    if (!count)

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        return S_FALSE;

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    return S_OK;

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}

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long WINAPI

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libAVEnumPins_Skip(libAVEnumPins *this, unsigned long n)

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{

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    dshowdebug("libAVEnumPins_Skip(%p)\n", this);

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    if (n) /* Any skip will always fall outside of the only valid pin. */

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        return S_FALSE;

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    return S_OK;

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}

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long WINAPI

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libAVEnumPins_Reset(libAVEnumPins *this)

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{

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    dshowdebug("libAVEnumPins_Reset(%p)\n", this);

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    this->pos = 0;

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    return S_OK;

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}

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long WINAPI

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libAVEnumPins_Clone(libAVEnumPins *this, libAVEnumPins **pins)

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{

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    libAVEnumPins *new;

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    dshowdebug("libAVEnumPins_Clone(%p)\n", this);

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    if (!pins)

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        return E_POINTER;

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    new = libAVEnumPins_Create(this->pin, this->filter);

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    if (!new)

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        return E_OUTOFMEMORY;

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    new->pos = this->pos;

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    *pins = new;

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    return S_OK;

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}

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static int

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libAVEnumPins_Setup(libAVEnumPins *this, libAVPin *pin, libAVFilter *filter)

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{

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    IEnumPinsVtbl *vtbl = this->vtbl;

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    SETVTBL(vtbl, libAVEnumPins, QueryInterface);

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    SETVTBL(vtbl, libAVEnumPins, AddRef);

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    SETVTBL(vtbl, libAVEnumPins, Release);

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    SETVTBL(vtbl, libAVEnumPins, Next);

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    SETVTBL(vtbl, libAVEnumPins, Skip);

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    SETVTBL(vtbl, libAVEnumPins, Reset);

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    SETVTBL(vtbl, libAVEnumPins, Clone);

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    this->pin = pin;

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    this->filter = filter;

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    libAVFilter_AddRef(this->filter);

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    return 1;

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}

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static int

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libAVEnumPins_Cleanup(libAVEnumPins *this)

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{

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    libAVFilter_Release(this->filter);

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    return 1;

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}

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DECLARE_CREATE(libAVEnumPins, libAVEnumPins_Setup(this, pin, filter),

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               libAVPin *pin, libAVFilter *filter)

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DECLARE_DESTROY(libAVEnumPins, libAVEnumPins_Cleanup)

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