filter.cpp

video linux conference

/*****************************************************************************
 * filter.c : DirectShow access module for vlc
 *****************************************************************************
 * Copyright (C) 2002 VideoLAN
 * $Id: filter.cpp 10183 2005-03-07 16:33:56Z gbazin $
 *
 * Author: Gildas Bazin <[e-mail]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include <vlc/vlc.h>
#include <vlc/input.h>
#include <vlc/vout.h>

#ifndef _MSC_VER
    /* Work-around a bug in w32api-2.5 */
#   define QACONTAINERFLAGS QACONTAINERFLAGS_SOMETHINGELSE
#endif

#include "common.h"
#include "filter.h"

#define DEBUG_DSHOW 1

#define FILTER_NAME  L"VideoLAN Capture Filter"
#define PIN_NAME     L"Capture"

/*****************************************************************************
 * DirectShow GUIDs.
 * Easier to define them hear as mingw doesn't provide them all.
 *****************************************************************************/
const GUID CLSID_SystemDeviceEnum = {0x62be5d10, 0x60eb, 0x11d0, {0xbd, 0x3b, 0x00, 0xa0, 0xc9, 0x11, 0xce, 0x86}};
const GUID CLSID_VideoInputDeviceCategory = {0x860BB310,0x5D01,0x11d0,{0xBD,0x3B,0x00,0xA0,0xC9,0x11,0xCE,0x86}};
const GUID CLSID_AudioInputDeviceCategory = {0x33d9a762, 0x90c8, 0x11d0, {0xbd, 0x43, 0x00, 0xa0, 0xc9, 0x11, 0xce, 0x86}};
//const GUID IID_IPropertyBag = {0x55272A00, 0x42CB, 0x11CE, {0x81, 0x35, 0x00, 0xAA, 0x00, 0x4B, 0xB8, 0x51}};
extern const GUID IID_IPropertyBag;
const GUID IID_ICreateDevEnum = {0x29840822, 0x5b84, 0x11d0, {0xbd, 0x3b, 0x00, 0xa0, 0xc9, 0x11, 0xce, 0x86}};
const GUID IID_IFilterGraph = {0x56a8689f, 0x0ad4, 0x11ce, {0xb0, 0x3a, 0x00, 0x20, 0xaf, 0x0b, 0xa7, 0x70}};
const GUID IID_IMediaControl = {0x56a868b1, 0x0ad4, 0x11ce, {0xb0, 0x3a, 0x00, 0x20, 0xaf, 0x0b, 0xa7, 0x70}};
const GUID CLSID_FilterGraph = {0xe436ebb3, 0x524f, 0x11ce, {0x9f, 0x53, 0x00, 0x20, 0xaf, 0x0b, 0xa7, 0x70}};

//const GUID IID_IUnknown = {0x00000000, 0x0000, 0x0000, {0xc0,0x00, 0x00,0x00,0x00,0x00,0x00,0x46}};
extern const GUID IID_IUnknown;
//const GUID IID_IPersist = {0x0000010c, 0x0000, 0x0000, {0xc0,0x00, 0x00,0x00,0x00,0x00,0x00,0x46}};
extern const GUID IID_IPersist;
const GUID IID_IMediaFilter = {0x56a86899, 0x0ad4, 0x11ce, {0xb0,0x3a, 0x00,0x20,0xaf,0x0b,0xa7,0x70}};
const GUID IID_IBaseFilter = {0x56a86895, 0x0ad4, 0x11ce, {0xb0, 0x3a, 0x00, 0x20, 0xaf, 0x0b, 0xa7, 0x70}};
const GUID IID_IPin = {0x56a86891, 0x0ad4, 0x11ce, {0xb0,0x3a, 0x00,0x20,0xaf,0x0b,0xa7,0x70}};
const GUID IID_IMemInputPin = {0x56a8689d, 0x0ad4, 0x11ce, {0xb0,0x3a, 0x00,0x20,0xaf,0x0b,0xa7,0x70}};
extern const GUID IID_IMemInputPin;

const GUID IID_IEnumPins = {0x56a86892, 0x0ad4, 0x11ce, {0xb0,0x3a, 0x00,0x20,0xaf,0x0b,0xa7,0x70}};
const GUID IID_IEnumMediaTypes = {0x89c31040, 0x846b, 0x11ce, {0x97,0xd3, 0x00,0xaa,0x00,0x55,0x59,0x5a}};

const GUID IID_IAMBufferNegotiation = {0x56ed71a0, 0xaf5f, 0x11d0, {0xb3, 0xf0, 0x00, 0xaa, 0x00, 0x37, 0x61, 0xc5}};

//const GUID IID_ISpecifyPropertyPages = {0xb196b28b, 0xbab4, 0x101a, {0xb6, 0x9c, 0x00, 0xaa, 0x00, 0x34, 0x1d, 0x07}};
extern const GUID IID_ISpecifyPropertyPages;

const GUID IID_IQualityControl = {0x56a868a5, 0x0ad4, 0x11ce, {0xb, 0x3a, 0x00, 0x20, 0xaf, 0x0b, 0xa7, 0x70}};

const GUID CLSID_CaptureGraphBuilder2 = {0xBF87B6E1, 0x8C27, 0x11d0, {0xB3, 0xF0, 0x0, 0xAA, 0x00, 0x37, 0x61, 0xC5}};

const GUID IID_IGraphBuilder = {0x56a868a9, 0x0ad4, 0x11ce, {0xb0, 0x3a, 0x00, 0x20, 0xaf, 0x0b, 0xa7, 0x70}};

const GUID IID_ICaptureGraphBuilder2 = {0x93E5A4E0, 0x2D50, 0x11d2, {0xAB, 0xFA, 0x00, 0xA0, 0xC9, 0xC6, 0xE3, 0x8D}};

const GUID IID_IAMTVAudio = {0x83EC1C30, 0x23D1, 0x11d1, {0x99, 0xE6, 0x00, 0xA0, 0xC9, 0x56, 0x02, 0x66}};
const GUID IID_IAMStreamConfig = {0xC6E13340, 0x30AC, 0x11d0, {0xA1, 0x8C, 0x00, 0xA0, 0xC9, 0x11, 0x89, 0x56}};
const GUID IID_IAMCrossbar = {0xC6E13380, 0x30AC, 0x11d0, {0xA1, 0x8C, 0x00, 0xA0, 0xC9, 0x11, 0x89, 0x56}};
const GUID IID_IAMTVTuner = {0x211A8766, 0x03AC, 0x11d1, {0x8D, 0x13, 0x00, 0xAA, 0x00, 0xBD, 0x83, 0x39}};

const GUID IID_IKsPropertySet = {0x31EFAC30, 0x515C, 0x11d0, {0xA9, 0xAA, 0x00, 0xAA, 0x00, 0x61, 0xBE, 0x93}};

/* Video Format */

const GUID FORMAT_VideoInfo  = {0x05589f80, 0xc356, 0x11ce, {0xbf, 0x01, 0x00, 0xaa, 0x00, 0x55, 0x59, 0x5a}};
/*
 * MEDIATYPEs and MEDIASUBTYPEs
 */
const GUID MEDIATYPE_Video = {0x73646976, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}};
const GUID MEDIATYPE_Interleaved = {0x73766169, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}};
const GUID MEDIATYPE_Stream = {0xe436eb83, 0x524f, 0x11ce, {0x9f, 0x53, 0x00, 0x20, 0xaf, 0x0b, 0xa7, 0x70}};
const GUID MEDIASUBTYPE_PREVIEW_VIDEO = {0x2859e1da, 0xb81f, 0x4fbd, {0x94, 0x3b, 0xe2, 0x37, 0x24, 0xa1, 0xab, 0xb3}};

/* Packed RGB formats */
const GUID MEDIASUBTYPE_RGB1 = {0xe436eb78, 0x524f, 0x11ce, {0x9f, 0x53, 0x00, 0x20, 0xaf, 0x0b, 0xa7, 0x70}};
const GUID MEDIASUBTYPE_RGB4 = {0xe436eb79, 0x524f, 0x11ce, {0x9f, 0x53, 0x00, 0x20, 0xaf, 0x0b, 0xa7, 0x70}};
const GUID MEDIASUBTYPE_RGB8 = {0xe436eb7a, 0x524f, 0x11ce, {0x9f, 0x53, 0x00, 0x20, 0xaf, 0x0b, 0xa7, 0x70}};
const GUID MEDIASUBTYPE_RGB565 = {0xe436eb7b, 0x524f, 0x11ce, {0x9f, 0x53, 0x00, 0x20, 0xaf, 0x0b, 0xa7, 0x70}};
const GUID MEDIASUBTYPE_RGB555 = {0xe436eb7c, 0x524f, 0x11ce, {0x9f, 0x53, 0x00, 0x20, 0xaf, 0x0b, 0xa7, 0x70}};
const GUID MEDIASUBTYPE_RGB24 = {0xe436eb7d, 0x524f, 0x11ce, {0x9f, 0x53, 0x00, 0x20, 0xaf, 0x0b, 0xa7, 0x70}};
const GUID MEDIASUBTYPE_RGB32 = {0xe436eb7e, 0x524f, 0x11ce, {0x9f, 0x53, 0x00, 0x20, 0xaf, 0x0b, 0xa7, 0x70}};
const GUID MEDIASUBTYPE_ARGB32 = {0x773c9ac0, 0x3274, 0x11d0, {0xb7, 0x24, 0x0, 0xaa, 0x0, 0x6c, 0x1a, 0x1}};

/* Packed YUV formats */
const GUID MEDIASUBTYPE_YUYV = {0x56595559, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}};
const GUID MEDIASUBTYPE_Y411 = {0x31313459, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}};
const GUID MEDIASUBTYPE_Y211 = {0x31313259, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}};
const GUID MEDIASUBTYPE_YUY2 = {0x32595559, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}};
const GUID MEDIASUBTYPE_YVYU = {0x55595659, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}};
const GUID MEDIASUBTYPE_UYVY = {0x59565955, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}};

/* Planar YUV formats */
const GUID MEDIASUBTYPE_YVU9 = {0x39555659, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}};
const GUID MEDIASUBTYPE_YV12 = {0x32315659, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}};
const GUID MEDIASUBTYPE_IYUV = {0x56555949, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}}; /* identical to YV12 */
const GUID MEDIASUBTYPE_Y41P = {0x50313459, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}};
const GUID MEDIASUBTYPE_I420 = {0x30323449, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}};

const GUID MEDIATYPE_Audio = {0x73647561, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}};
const GUID FORMAT_WaveFormatEx = {0x05589f81, 0xc356, 0x11ce, {0xbf, 0x01, 0x00, 0xaa, 0x00, 0x55, 0x59, 0x5a}};
const GUID MEDIASUBTYPE_PCM = {0x00000001, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}};
const GUID MEDIASUBTYPE_IEEE_FLOAT = {0x00000003, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}};

/* DV formats */
const GUID MEDIASUBTYPE_dvsd = {0x64737664, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}};
const GUID MEDIASUBTYPE_dvhd = {0x64687664, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}};
const GUID MEDIASUBTYPE_dvsl = {0x6c737664, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}};

/* MPEG2 formats */
const GUID MEDIASUBTYPE_MPEG2_VIDEO = {0xe06d8026, 0xdb46, 0x11cf, {0xb4, 0xd1, 0x00, 0x80, 0x5f, 0x6c, 0xbb, 0xea}};
const GUID MEDIASUBTYPE_MPEG2_PROGRAM = {0xe06d8022, 0xdb46, 0x11cf, {0xb4, 0xd1, 0x00, 0x80, 0x5f, 0x6c, 0xbb, 0xea}};
const GUID MEDIASUBTYPE_MPEG2_TRANSPORT = {0xe06d8023, 0xdb46, 0x11cf, {0xb4, 0xd1, 0x00, 0x80, 0x5f, 0x6c, 0xbb, 0xea}};
const GUID FORMAT_MPEG2Video = {0xe06d80e3, 0xdb46, 0x11cf, {0xb4, 0xd1, 0x00, 0x80, 0x5f, 0x6c, 0xbb, 0xea}};

/* Analog Video */
const GUID FORMAT_AnalogVideo = {0x482dde0, 0x7817, 0x11cf, {0x8a, 0x3, 0x0, 0xaa, 0x0, 0x6e, 0xcb, 0x65}};

const GUID MEDIATYPE_AnalogVideo = {0x482dde1, 0x7817, 0x11cf, {0x8a, 0x3, 0x0, 0xab, 0x0, 0x6e, 0xcb, 0x65}};

const GUID MEDIASUBTYPE_AnalogVideo_NTSC_M = {0x482dde2, 0x7817, 0x11cf, {0x8a, 0x3, 0x0, 0xaa, 0x0, 0x6e, 0xcb, 0x65}};
const GUID MEDIASUBTYPE_AnalogVideo_PAL_B = {0x482dde5, 0x7817, 0x11cf, {0x8a, 0x3, 0x0, 0xaa, 0x0, 0x6e, 0xcb, 0x65}};
const GUID MEDIASUBTYPE_AnalogVideo_PAL_D = {0x482dde6, 0x7817, 0x11cf, {0x8a, 0x3, 0x0, 0xaa, 0x0, 0x6e, 0xcb, 0x65}};
const GUID MEDIASUBTYPE_AnalogVideo_PAL_G = {0x482dde7, 0x7817, 0x11cf, {0x8a, 0x3, 0x0, 0xaa, 0x0, 0x6e, 0xcb, 0x65}};
const GUID MEDIASUBTYPE_AnalogVideo_PAL_H = {0x482dde8, 0x7817, 0x11cf, {0x8a, 0x3, 0x0, 0xaa, 0x0, 0x6e, 0xcb, 0x65}};
const GUID MEDIASUBTYPE_AnalogVideo_PAL_I = {0x482dde9, 0x7817, 0x11cf, {0x8a, 0x3, 0x0, 0xaa, 0x0, 0x6e, 0xcb, 0x65}};
const GUID MEDIASUBTYPE_AnalogVideo_PAL_M = {0x482ddea, 0x7817, 0x11cf, {0x8a, 0x3, 0x0, 0xaa, 0x0, 0x6e, 0xcb, 0x65}};
const GUID MEDIASUBTYPE_AnalogVideo_PAL_N = {0x482ddeb, 0x7817, 0x11cf, {0x8a, 0x3, 0x0, 0xaa, 0x0, 0x6e, 0xcb, 0x65}};
const GUID MEDIASUBTYPE_AnalogVideo_PAL_N_COMBO = {0x482ddec, 0x7817, 0x11cf, {0x8a, 0x3, 0x0, 0xaa, 0x0, 0x6e, 0xcb, 0x65}};
const GUID MEDIASUBTYPE_AnalogVideo_SECAM_B = {0x482ddf0, 0x7817, 0x11cf, {0x8a, 0x3, 0x0, 0xaa, 0x0, 0x6e, 0xcb, 0x65}};
const GUID MEDIASUBTYPE_AnalogVideo_SECAM_D = {0x482ddf1, 0x7817, 0x11cf, {0x8a, 0x3, 0x0, 0xaa, 0x0, 0x6e, 0xcb, 0x65}};
const GUID MEDIASUBTYPE_AnalogVideo_SECAM_G = {0x482ddf2, 0x7817, 0x11cf, {0x8a, 0x3, 0x0, 0xaa, 0x0, 0x6e, 0xcb, 0x65}};
const GUID MEDIASUBTYPE_AnalogVideo_SECAM_H = {0x482ddf3, 0x7817, 0x11cf, {0x8a, 0x3, 0x0, 0xaa, 0x0, 0x6e, 0xcb, 0x65}};
const GUID MEDIASUBTYPE_AnalogVideo_SECAM_K = {0x482ddf4, 0x7817, 0x11cf, {0x8a, 0x3, 0x0, 0xaa, 0x0, 0x6e, 0xcb, 0x65}};
const GUID MEDIASUBTYPE_AnalogVideo_SECAM_K1 = {0x482ddf5, 0x7817, 0x11cf, {0x8a, 0x3, 0x0, 0xaa, 0x0, 0x6e, 0xcb, 0x65}};
const GUID MEDIASUBTYPE_AnalogVideo_SECAM_L = {0x482ddf6, 0x7817, 0x11cf, {0x8a, 0x3, 0x0, 0xaa, 0x0, 0x6e, 0xcb, 0x65}};

const GUID AMPROPSETID_Pin= {0x9b00f101, 0x1567, 0x11d1, {0xb3, 0xf1, 0x0, 0xaa, 0x0, 0x37, 0x61, 0xc5}};
const GUID PIN_CATEGORY_ANALOGVIDEOIN= {0xfb6c4283, 0x0353, 0x11d1, {0x90, 0x5f, 0x00, 0x00, 0xc0, 0xcc, 0x16, 0xba}};
const GUID PIN_CATEGORY_CAPTURE= {0xfb6c4281, 0x0353, 0x11d1, {0x90, 0x5f, 0x0, 0x0, 0xc0, 0xcc, 0x16, 0xba}};
const GUID LOOK_UPSTREAM_ONLY= {0xac798be0, 0x98e3, 0x11d1, {0xb3, 0xf1, 0x0, 0xaa, 0x0, 0x37, 0x61, 0xc}};

//const GUID GUID_NULL = {0x0000, 0x0000, 0x0000, {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}};
extern const GUID GUID_NULL;

void WINAPI FreeMediaType( AM_MEDIA_TYPE& mt )
{
    if( mt.cbFormat != 0 )
    {
        CoTaskMemFree( (PVOID)mt.pbFormat );
        mt.cbFormat = 0;
        mt.pbFormat = NULL;
    }
    if( mt.pUnk != NULL )
    {
        mt.pUnk->Release();
        mt.pUnk = NULL;
    }
}

HRESULT WINAPI CopyMediaType( AM_MEDIA_TYPE *pmtTarget,
                              const AM_MEDIA_TYPE *pmtSource )
{
    *pmtTarget = *pmtSource;

    if( !pmtSource || !pmtTarget ) return S_FALSE;

    if( pmtSource->cbFormat && pmtSource->pbFormat )
    {
        pmtTarget->pbFormat = (PBYTE)CoTaskMemAlloc( pmtSource->cbFormat );
        if( pmtTarget->pbFormat == NULL )
        {
            pmtTarget->cbFormat = 0;
            return E_OUTOFMEMORY;
        }
        else
        {
            CopyMemory( (PVOID)pmtTarget->pbFormat, (PVOID)pmtSource->pbFormat,
                        pmtTarget->cbFormat );
        }
    }
    if( pmtTarget->pUnk != NULL )
    {
        pmtTarget->pUnk->AddRef();
    }

    return S_OK;
}

int GetFourCCFromMediaType( const AM_MEDIA_TYPE &media_type )
{
    int i_fourcc = 0;

    if( media_type.majortype == MEDIATYPE_Video )
    {
        /* currently only support this type of video info format */
        if( 1 /* media_type.formattype == FORMAT_VideoInfo */ )
        {
            /* Packed RGB formats */
            if( media_type.subtype == MEDIASUBTYPE_RGB1 )
               i_fourcc = VLC_FOURCC( 'R', 'G', 'B', '1' );
            else if( media_type.subtype == MEDIASUBTYPE_RGB4 )
               i_fourcc = VLC_FOURCC( 'R', 'G', 'B', '4' );
            else if( media_type.subtype == MEDIASUBTYPE_RGB8 )
               i_fourcc = VLC_FOURCC( 'R', 'G', 'B', '8' );
            else if( media_type.subtype == MEDIASUBTYPE_RGB555 )
               i_fourcc = VLC_FOURCC( 'R', 'V', '1', '5' );
            else if( media_type.subtype == MEDIASUBTYPE_RGB565 )
               i_fourcc = VLC_FOURCC( 'R', 'V', '1', '6' );
            else if( media_type.subtype == MEDIASUBTYPE_RGB24 )
               i_fourcc = VLC_FOURCC( 'R', 'V', '2', '4' );
            else if( media_type.subtype == MEDIASUBTYPE_RGB32 )
               i_fourcc = VLC_FOURCC( 'R', 'V', '3', '2' );
            else if( media_type.subtype == MEDIASUBTYPE_ARGB32 )
               i_fourcc = VLC_FOURCC( 'R', 'G', 'B', 'A' );

            /* Planar YUV formats */
            else if( media_type.subtype == MEDIASUBTYPE_I420 )
               i_fourcc = VLC_FOURCC( 'I', '4', '2', '0' );
            else if( media_type.subtype == MEDIASUBTYPE_Y41P )
               i_fourcc = VLC_FOURCC( 'I', '4', '1', '1' );
            else if( media_type.subtype == MEDIASUBTYPE_YV12 )
               i_fourcc = VLC_FOURCC( 'Y', 'V', '1', '2' );
            else if( media_type.subtype == MEDIASUBTYPE_IYUV )
               i_fourcc = VLC_FOURCC( 'Y', 'V', '1', '2' );
            else if( media_type.subtype == MEDIASUBTYPE_YVU9 )
               i_fourcc = VLC_FOURCC( 'Y', 'V', 'U', '9' );

            /* Packed YUV formats */
            else if( media_type.subtype == MEDIASUBTYPE_YVYU )
               i_fourcc = VLC_FOURCC( 'Y', 'V', 'Y', 'U' );
            else if( media_type.subtype == MEDIASUBTYPE_YUYV )
               i_fourcc = VLC_FOURCC( 'Y', 'U', 'Y', '2' );
            else if( media_type.subtype == MEDIASUBTYPE_Y411 )
               i_fourcc = VLC_FOURCC( 'I', '4', '1', 'N' );
            else if( media_type.subtype == MEDIASUBTYPE_Y211 )
               i_fourcc = VLC_FOURCC( 'Y', '2', '1', '1' );
            else if( media_type.subtype == MEDIASUBTYPE_YUY2 )
               i_fourcc = VLC_FOURCC( 'Y', 'U', 'Y', '2' );
            else if( media_type.subtype == MEDIASUBTYPE_UYVY )
               i_fourcc = VLC_FOURCC( 'U', 'Y', 'V', 'Y' );

            /* MPEG2 video elementary stream */
            else if( media_type.subtype == MEDIASUBTYPE_MPEG2_VIDEO )
               i_fourcc = VLC_FOURCC( 'm', 'p', '2', 'v' );

            /* DV formats */
            else if( media_type.subtype == MEDIASUBTYPE_dvsl )
               i_fourcc = VLC_FOURCC( 'd', 'v', 's', 'l' );
            else if( media_type.subtype == MEDIASUBTYPE_dvsd )
               i_fourcc = VLC_FOURCC( 'd', 'v', 's', 'd' );
            else if( media_type.subtype == MEDIASUBTYPE_dvhd )
               i_fourcc = VLC_FOURCC( 'd', 'v', 'h', 'd' );
        }
    }
    else if( media_type.majortype == MEDIATYPE_Audio )
    {
        /* currently only support this type of audio info format */
        if( media_type.formattype == FORMAT_WaveFormatEx )
        {
            if( media_type.subtype == MEDIASUBTYPE_PCM )
                i_fourcc = VLC_FOURCC( 'a', 'r', 'a', 'w' );
            else if( media_type.subtype == MEDIASUBTYPE_IEEE_FLOAT )
                i_fourcc = VLC_FOURCC( 'f', 'l', '3', '2' );
        }
    }
    else if( media_type.majortype == MEDIATYPE_Stream )
    {
        if( media_type.subtype == MEDIASUBTYPE_MPEG2_PROGRAM )
            i_fourcc = VLC_FOURCC( 'm', 'p', '2', 'p' );
        else if( media_type.subtype == MEDIASUBTYPE_MPEG2_TRANSPORT )
            i_fourcc = VLC_FOURCC( 'm', 'p', '2', 't' );
    }

    return i_fourcc;
}

/****************************************************************************
 * Implementation of our dummy directshow filter pin class
 ****************************************************************************/

CapturePin::CapturePin( vlc_object_t *_p_input, access_sys_t *_p_sys,
                        CaptureFilter *_p_filter,
                        AM_MEDIA_TYPE *mt, size_t mt_count )
  : p_input( _p_input ), p_sys( _p_sys ), p_filter( _p_filter ),
    p_connected_pin( NULL ),  media_types(mt), media_type_count(mt_count),
    i_ref( 1 )
{
    cx_media_type.majortype = mt[0].majortype;
    cx_media_type.subtype   = GUID_NULL;
    cx_media_type.pbFormat  = NULL;
    cx_media_type.cbFormat  = 0;
    cx_media_type.pUnk      = NULL;
}

CapturePin::~CapturePin()
{
#ifdef DEBUG_DSHOW
    msg_Dbg( p_input, "CapturePin::~CapturePin" );
#endif
    for( size_t c=0; c<media_type_count; c++ )
    {
        FreeMediaType(media_types[c]);
    }
    FreeMediaType(cx_media_type);
}

HRESULT CapturePin::CustomGetSample( VLCMediaSample *vlc_sample )
{
#if 0 //def DEBUG_DSHOW
    msg_Dbg( p_input, "CapturePin::CustomGetSample" );
#endif

    vlc_mutex_lock( &p_sys->lock );
    if( samples_queue.size() )
    {
        *vlc_sample = samples_queue.back();
        samples_queue.pop_back();
        vlc_mutex_unlock( &p_sys->lock );
        return S_OK;
    }
    vlc_mutex_unlock( &p_sys->lock );
    return S_FALSE;
}

AM_MEDIA_TYPE &CapturePin::CustomGetMediaType()
{
    return cx_media_type;
}

/* IUnknown methods */
STDMETHODIMP CapturePin::QueryInterface(REFIID riid, void **ppv)
{
#ifdef DEBUG_DSHOW_L1
    msg_Dbg( p_input, "CapturePin::QueryInterface" );
#endif

    if( riid == IID_IUnknown ||
        riid == IID_IPin )
    {
        AddRef();
        *ppv = (IPin *)this;
        return NOERROR;
    }
    if( riid == IID_IMemInputPin )
    {
        AddRef();
        *ppv = (IMemInputPin *)this;
        return NOERROR;
    }
    else
    {
#ifdef DEBUG_DSHOW_L1
        msg_Dbg( p_input, "CapturePin::QueryInterface() failed for: "
                 "%04X-%02X-%02X-%02X%02X%02X%02X%02X%02X%02X%02X",
                 (int)riid.Data1, (int)riid.Data2, (int)riid.Data3,
                 static_cast<int>(riid.Data4[0]), (int)riid.Data4[1],
                 (int)riid.Data4[2], (int)riid.Data4[3],
                 (int)riid.Data4[4], (int)riid.Data4[5],
                 (int)riid.Data4[6], (int)riid.Data4[7] );
#endif
        *ppv = NULL;
        return E_NOINTERFACE;
    }
}

STDMETHODIMP_(ULONG) CapturePin::AddRef()
{
#ifdef DEBUG_DSHOW_L1
    msg_Dbg( p_input, "CapturePin::AddRef (ref: %i)", i_ref );
#endif

    return i_ref++;
};
STDMETHODIMP_(ULONG) CapturePin::Release()
{
#ifdef DEBUG_DSHOW_L1
    msg_Dbg( p_input, "CapturePin::Release (ref: %i)", i_ref );
#endif

    if( !InterlockedDecrement(&i_ref) ) delete this;

    return 0;
};

/* IPin methods */
STDMETHODIMP CapturePin::Connect( IPin * pReceivePin,
                                  const AM_MEDIA_TYPE *pmt )
{
    if( State_Running == p_filter->state )
    {
        msg_Dbg( p_input, "CapturePin::Connect [not stopped]" );
        return VFW_E_NOT_STOPPED;