dshow.cpp

/*****************************************************************************
 * dshow.cpp : DirectShow access and access_demux module for vlc
 *****************************************************************************
 * Copyright (C) 2002-2004, 2006, 2008, 2010 the VideoLAN team
 * $Id$
 *
 * Author: Gildas Bazin <gbazin@videolan.org>
 *         Damien Fouilleul <damienf@videolan.org>
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#define CFG_PREFIX "dshow-"
#include <inttypes.h>
#include <list>
#include <string>
#include <assert.h>
#include <stdexcept>

#define VLC_MODULE_LICENSE VLC_LICENSE_GPL_2_PLUS
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_access.h>
#include <vlc_demux.h>

#include <vlc_dialog.h>      /* vlc_dialog_display_error */
#include <vlc_charset.h>     /* FromWide */

#include <initguid.h>
#include "vlc_dshow.h"

#include "access.h"
#include "filter.h"

#include "../src/win32/mta_holder.h"

#define INSTANCEDATA_OF_PROPERTY_PTR(x) ((PKSPROPERTY((x))) + 1)
#define INSTANCEDATA_OF_PROPERTY_SIZE(x) (sizeof((x)) - sizeof(KSPROPERTY))

/*****************************************************************************
 * Access: local prototypes
 *****************************************************************************/
static block_t *ReadCompressed( access_t *, bool * );
static int AccessControl ( access_t *, int, va_list );

static int Demux       ( demux_t * );
static int DemuxControl( demux_t *, int, va_list );

static int OpenDevice( vlc_object_t *, access_sys_t *, std::string, bool );
static ComPtr<IBaseFilter> FindCaptureDevice( vlc_object_t *, std::string *,
                                       std::list<std::string> *, bool );
static size_t EnumDeviceCaps( vlc_object_t *, IBaseFilter *,
                              int, int, int, int, int, int,
                              AM_MEDIA_TYPE *mt, size_t, bool );
static bool ConnectFilters( vlc_object_t *, access_sys_t *,
                            IBaseFilter *, CaptureFilter * );
static int FindDevices( vlc_object_t *, const char *, char ***, char *** );

static void ShowPropertyPage( IUnknown * );
static void ShowDeviceProperties( vlc_object_t *, ICaptureGraphBuilder2 *,
                                  IBaseFilter *, bool );
static void ShowTunerProperties( vlc_object_t *, ICaptureGraphBuilder2 *,
                                 IBaseFilter *, bool );
static void ConfigTuner( vlc_object_t *, ICaptureGraphBuilder2 *,
                         IBaseFilter * );

/*****************************************************************************
 * Module descriptor
 *****************************************************************************/
static const int pi_tuner_input[] = { 0, 1, 2 };
static const char *const ppsz_tuner_input_text[] =
    {N_("Default"), N_("Cable"), N_("Antenna")};

static const int pi_amtuner_mode[]  = { AMTUNER_MODE_DEFAULT,
                                        AMTUNER_MODE_TV,
                                        AMTUNER_MODE_FM_RADIO,
                                        AMTUNER_MODE_AM_RADIO,
                                        AMTUNER_MODE_DSS };
static const char *const ppsz_amtuner_mode_text[] = { N_("Default"),
                                          N_("TV"),
                                          N_("FM radio"),
                                          N_("AM radio"),
                                          N_("DSS") };

static const int i_standards_list[] =
    {
        KS_AnalogVideo_None,
        KS_AnalogVideo_NTSC_M, KS_AnalogVideo_NTSC_M_J, KS_AnalogVideo_NTSC_433,
        KS_AnalogVideo_PAL_B, KS_AnalogVideo_PAL_D, KS_AnalogVideo_PAL_G,
        KS_AnalogVideo_PAL_H, KS_AnalogVideo_PAL_I, KS_AnalogVideo_PAL_M,
        KS_AnalogVideo_PAL_N, KS_AnalogVideo_PAL_60,
        KS_AnalogVideo_SECAM_B, KS_AnalogVideo_SECAM_D, KS_AnalogVideo_SECAM_G,
        KS_AnalogVideo_SECAM_H, KS_AnalogVideo_SECAM_K, KS_AnalogVideo_SECAM_K1,
        KS_AnalogVideo_SECAM_L, KS_AnalogVideo_SECAM_L1,
        KS_AnalogVideo_PAL_N_COMBO
    };
static const char *const ppsz_standards_list_text[] =
    {
        N_("Default"),
        "NTSC_M", "NTSC_M_J", "NTSC_443",
        "PAL_B", "PAL_D", "PAL_G",
        "PAL_H", "PAL_I", "PAL_M",
        "PAL_N", "PAL_60",
        "SECAM_B", "SECAM_D", "SECAM_G",
        "SECAM_H", "SECAM_K", "SECAM_K1",
        "SECAM_L", "SECAM_L1",
        "PAL_N_COMBO"
    };

#define VDEV_TEXT N_("Video device name")
#define VDEV_LONGTEXT N_( \
    "Name of the video device that will be used by the " \
    "DirectShow plugin. If you don't specify anything, the default device " \
    "will be used.")
#define ADEV_TEXT N_("Audio device name")
#define ADEV_LONGTEXT N_( \
    "Name of the audio device that will be used by the " \
    "DirectShow plugin. If you don't specify anything, the default device " \
    "will be used. ")
#define SIZE_TEXT N_("Video size")
#define SIZE_LONGTEXT N_( \
    "Size of the video that will be displayed by the " \
    "DirectShow plugin. If you don't specify anything the default size for " \
    "your device will be used. You can specify a standard size (cif, d1, ...) or <width>x<height>.")
#define ASPECT_TEXT N_("Picture aspect-ratio n:m")
#define ASPECT_LONGTEXT N_("Define input picture aspect-ratio to use. Default is 4:3" )
#define CHROMA_TEXT N_("Video input chroma format")
#define CHROMA_LONGTEXT N_( \
    "Force the DirectShow video input to use a specific chroma format " \
    "(eg. I420 (default), RV24, etc.)")
#define FPS_TEXT N_("Video input frame rate")
#define FPS_LONGTEXT N_( \
    "Force the DirectShow video input to use a specific frame rate " \
    "(eg. 0 means default, 25, 29.97, 50, 59.94, etc.)")
#define CONFIG_TEXT N_("Device properties")
#define CONFIG_LONGTEXT N_( \
    "Show the properties dialog of the selected device before starting the " \
    "stream.")
#define TUNER_TEXT N_("Tuner properties")
#define TUNER_LONGTEXT N_( \
    "Show the tuner properties [channel selection] page." )
#define CHANNEL_TEXT N_("Tuner TV Channel")
#define CHANNEL_LONGTEXT N_( \
    "Set the TV channel the tuner will set to " \
    "(0 means default)." )
#define TVFREQ_TEXT N_("Tuner Frequency")
#define TVFREQ_LONGTEXT N_(  "This overrides the channel. Measured in Hz." )
#define STANDARD_TEXT N_( "Video standard" )
#define COUNTRY_TEXT N_("Tuner country code")
#define COUNTRY_LONGTEXT N_( \
    "Set the tuner country code that establishes the current " \
    "channel-to-frequency mapping (0 means default)." )
#define TUNER_INPUT_TEXT N_("Tuner input type")
#define TUNER_INPUT_LONGTEXT N_( \
    "Select the tuner input type (Cable/Antenna)." )
#define VIDEO_IN_TEXT N_("Video input pin")
#define VIDEO_IN_LONGTEXT N_( \
  "Select the video input source, such as composite, s-video, " \
  "or tuner. Since these settings are hardware-specific, you should find good " \
  "settings in the \"Device config\" area, and use those numbers here. -1 " \
  "means that settings will not be changed.")
#define AUDIO_IN_TEXT N_("Audio input pin")
#define AUDIO_IN_LONGTEXT N_( \
  "Select the audio input source. See the \"video input\" option." )
#define VIDEO_OUT_TEXT N_("Video output pin")
#define VIDEO_OUT_LONGTEXT N_( \
  "Select the video output type. See the \"video input\" option." )
#define AUDIO_OUT_TEXT N_("Audio output pin")
#define AUDIO_OUT_LONGTEXT N_( \
  "Select the audio output type. See the \"video input\" option." )

#define AMTUNER_MODE_TEXT N_("AM Tuner mode")
#define AMTUNER_MODE_LONGTEXT N_( \
    "AM Tuner mode. Can be one of Default (0), TV (1), " \
     "AM Radio (2), FM Radio (3) or DSS (4).")

#define AUDIO_CHANNELS_TEXT N_("Number of audio channels")
#define AUDIO_CHANNELS_LONGTEXT N_( \
    "Select audio input format with the given number of audio channels (if non 0)" )

#define AUDIO_SAMPLERATE_TEXT N_("Audio sample rate")
#define AUDIO_SAMPLERATE_LONGTEXT N_( \
    "Select audio input format with the given sample rate (if non 0)" )

#define AUDIO_BITSPERSAMPLE_TEXT N_("Audio bits per sample")
#define AUDIO_BITSPERSAMPLE_LONGTEXT N_( \
    "Select audio input format with the given bits/sample (if non 0)" )

static int  CommonOpen ( vlc_object_t *, access_sys_t *, bool );
static void CommonClose( vlc_object_t *, access_sys_t * );

static int  AccessOpen ( vlc_object_t * );
static void AccessClose( vlc_object_t * );

static int  DemuxOpen  ( vlc_object_t * );
static void DemuxClose ( vlc_object_t * );

vlc_module_begin ()
    set_shortname( N_("DirectShow") )
    set_description( N_("DirectShow input") )
    set_category( CAT_INPUT )
    set_subcategory( SUBCAT_INPUT_ACCESS )

    add_string( CFG_PREFIX "vdev", NULL, VDEV_TEXT, VDEV_LONGTEXT, false)
        change_string_cb( FindDevices )

    add_string( CFG_PREFIX "adev", NULL, ADEV_TEXT, ADEV_LONGTEXT, false)
        change_string_cb( FindDevices )

    add_string( CFG_PREFIX "size", NULL, SIZE_TEXT, SIZE_LONGTEXT, false)
        change_safe()

    add_string( CFG_PREFIX "aspect-ratio", "4:3", ASPECT_TEXT, ASPECT_LONGTEXT, false)
        change_safe()

    add_string( CFG_PREFIX "chroma", NULL, CHROMA_TEXT, CHROMA_LONGTEXT, true )
        change_safe()

    add_float( CFG_PREFIX "fps", 0.0f, FPS_TEXT, FPS_LONGTEXT, true )
        change_safe()

    add_bool( CFG_PREFIX "config", false, CONFIG_TEXT, CONFIG_LONGTEXT, true )

    add_bool( CFG_PREFIX "tuner", false, TUNER_TEXT, TUNER_LONGTEXT, true )

    add_integer( CFG_PREFIX "tuner-channel", 0, CHANNEL_TEXT, CHANNEL_LONGTEXT,
                true )
        change_safe()

    add_integer( CFG_PREFIX "tuner-frequency", 0, TVFREQ_TEXT, TVFREQ_LONGTEXT,
                true )
        change_safe()

    add_integer( CFG_PREFIX "tuner-country", 0, COUNTRY_TEXT, COUNTRY_LONGTEXT,
                true )

    add_integer( CFG_PREFIX "tuner-standard", 0, STANDARD_TEXT, STANDARD_TEXT,
                false )
        change_integer_list( i_standards_list, ppsz_standards_list_text )
        change_safe()

    add_integer( CFG_PREFIX "tuner-input", 0, TUNER_INPUT_TEXT,
                 TUNER_INPUT_LONGTEXT, true )
        change_integer_list( pi_tuner_input, ppsz_tuner_input_text )
        change_safe()

    add_integer( CFG_PREFIX "video-input",  -1, VIDEO_IN_TEXT,
                 VIDEO_IN_LONGTEXT, true )
        change_safe()

    add_integer( CFG_PREFIX "video-output", -1, VIDEO_OUT_TEXT,
                 VIDEO_OUT_LONGTEXT, true )

    add_integer( CFG_PREFIX "audio-input",  -1, AUDIO_IN_TEXT,
                 AUDIO_IN_LONGTEXT, true )
        change_safe()

    add_integer( CFG_PREFIX "audio-output", -1, AUDIO_OUT_TEXT,
                 AUDIO_OUT_LONGTEXT, true )

    add_integer( CFG_PREFIX "amtuner-mode", AMTUNER_MODE_TV,
                AMTUNER_MODE_TEXT, AMTUNER_MODE_LONGTEXT, false)
        change_integer_list( pi_amtuner_mode, ppsz_amtuner_mode_text )
        change_safe()

    add_integer( CFG_PREFIX "audio-channels", 0, AUDIO_CHANNELS_TEXT,
                 AUDIO_CHANNELS_LONGTEXT, true )
    add_integer( CFG_PREFIX "audio-samplerate", 0, AUDIO_SAMPLERATE_TEXT,
                 AUDIO_SAMPLERATE_LONGTEXT, true )
    add_integer( CFG_PREFIX "audio-bitspersample", 0, AUDIO_BITSPERSAMPLE_TEXT,
                 AUDIO_BITSPERSAMPLE_LONGTEXT, true )

    add_shortcut( "dshow" )
    set_capability( "access_demux", 0 )
    set_callbacks( DemuxOpen, DemuxClose )

    add_submodule ()
    set_description( N_("DirectShow input") )
    add_shortcut( "dshow" )
    set_capability( "access", 0 )
    set_callbacks( AccessOpen, AccessClose )

vlc_module_end ()

struct ComContext
{
    ComContext( int mode )
    {
        if( FAILED( CoInitializeEx( NULL, mode ) ) )
            throw std::runtime_error( "CoInitializeEx failed" );
    }
    ~ComContext()
    {
        CoUninitialize();
    }
};

/*****************************************************************************
 * DirectShow elementary stream descriptor
 *****************************************************************************/
struct dshow_stream_t
{
    std::string           devicename;
    ComPtr<IBaseFilter>   p_device_filter;
    ComPtr<CaptureFilter> p_capture_filter;
    AM_MEDIA_TYPE   mt;

    union
    {
      VIDEOINFOHEADER video;
      WAVEFORMATEX    audio;

    } header;

    int             i_fourcc;
    es_out_id_t     *p_es;

    bool      b_pts;

    std::deque<VLCMediaSample> samples_queue;
};

/*****************************************************************************
 * DirectShow utility functions
 *****************************************************************************/
static void CreateDirectShowGraph( access_sys_t *p_sys )
{
    p_sys->i_crossbar_route_depth = 0;

    /* Create directshow filter graph */
    if( SUCCEEDED( CoCreateInstance( CLSID_FilterGraph, 0, CLSCTX_INPROC,
                       (REFIID)IID_IFilterGraph, (void**)p_sys->p_graph.GetAddressOf() ) ) )
    {
        /* Create directshow capture graph builder if available */
        if( SUCCEEDED( CoCreateInstance( CLSID_CaptureGraphBuilder2, 0,
                         CLSCTX_INPROC, (REFIID)IID_ICaptureGraphBuilder2,
                         (void**)p_sys->p_capture_graph_builder2.GetAddressOf() ) ) )
        {
            p_sys->p_capture_graph_builder2->
                SetFiltergraph((IGraphBuilder *)p_sys->p_graph.Get() );
        }

        p_sys->p_graph->QueryInterface( IID_IMediaControl,
                                        (void**)p_sys->p_control.GetAddressOf() );
    }
}

static void DeleteDirectShowGraph( vlc_object_t *p_this, access_sys_t *p_sys )
{
    DeleteCrossbarRoutes( p_sys );

    /* Remove filters from graph */
    msg_Dbg( p_this, "DeleteDirectShowGraph: Removing filters" );
    std::vector<dshow_stream_t*>::iterator it = p_sys->pp_streams.begin();
    std::vector<dshow_stream_t*>::iterator end = p_sys->pp_streams.end();
    for( ; it != end; ++it )
    {
        /* RemoveFilter does an undocumented Release()
         * but does not set item to NULL */
        msg_Dbg( p_this, "DeleteDirectShowGraph: Removing capture filter" );
        p_sys->p_graph->RemoveFilter( (*it)->p_capture_filter.Get() );
        (*it)->p_capture_filter.Reset();

        msg_Dbg( p_this, "DeleteDirectShowGraph: Removing device filter" );
        p_sys->p_graph->RemoveFilter( (*it)->p_device_filter.Get() );
        (*it)->p_device_filter.Reset();
    }

    /* Release directshow objects */
    p_sys->p_control.Reset();
    p_sys->p_capture_graph_builder2.Reset();
    p_sys->p_graph.Reset();
}

/*****************************************************************************
 * CommonOpen: open direct show device
 *****************************************************************************/
static int CommonOpen( vlc_object_t *p_this, access_sys_t *p_sys,
                       bool b_access_demux )
{
    char *psz_val;

    /* Get/parse options and open device(s) */
    std::string vdevname, adevname;
    int i_width = 0, i_height = 0;
    vlc_fourcc_t i_chroma = 0;
    bool b_use_audio = true;
    bool b_use_video = true;

    var_Create( p_this,  CFG_PREFIX "config", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
    var_Create( p_this,  CFG_PREFIX "tuner", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
    psz_val = var_CreateGetString( p_this, CFG_PREFIX "vdev" );
    if( psz_val )
    {
        msg_Dbg( p_this, "dshow-vdev: %s", psz_val ) ;
        /* skip none device */
        if ( strncasecmp( psz_val, "none", 4 ) != 0 )
            vdevname = std::string( psz_val );
        else
            b_use_video = false ;
    }
    free( psz_val );

    psz_val = var_CreateGetString( p_this, CFG_PREFIX "adev" );
    if( psz_val )
    {
        msg_Dbg( p_this, "dshow-adev: %s", psz_val ) ;
        /* skip none device */
        if ( strncasecmp( psz_val, "none", 4 ) != 0 )
            adevname = std::string( psz_val );
        else
            b_use_audio = false ;
    }
    free( psz_val );

    /* DShow Size */
    static struct {
        const char *psz_size;
        int  i_width;
        int  i_height;
    } size_table[] =
    { { "subqcif", 128, 96  },
      {    "qsif", 160, 120 },
      {    "qcif", 176, 144 },
      {     "sif", 320, 240 },
      {     "cif", 352, 288 },
      {      "d1", 640, 480 },
      { 0, 0, 0 },
    };

    psz_val = var_CreateGetString( p_this, CFG_PREFIX "size" );
    if( !EMPTY_STR(psz_val) )
    {
        int i;
        for( i = 0; size_table[i].psz_size; i++ )
        {
            if( !strcmp( psz_val, size_table[i].psz_size ) )
            {
                i_width = size_table[i].i_width;
                i_height = size_table[i].i_height;
                break;
            }
        }
        if( !size_table[i].psz_size ) /* Try to parse "WidthxHeight" */
        {
            char *psz_parser;
            i_width = strtol( psz_val, &psz_parser, 0 );
            if( *psz_parser == 'x' || *psz_parser == 'X')
            {
                i_height = strtol( psz_parser + 1, &psz_parser, 0 );
            }
            msg_Dbg( p_this, "width x height %dx%d", i_width, i_height );
        }
    }
    free( psz_val );

    /* Chroma */
    psz_val = var_CreateGetString( p_this, CFG_PREFIX "chroma" );
    i_chroma = vlc_fourcc_GetCodecFromString( VIDEO_ES, psz_val );
    free( psz_val );

    var_Create( p_this, CFG_PREFIX "fps", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT );
    var_Create( p_this, CFG_PREFIX "tuner-channel",
                VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
    var_Create( p_this, CFG_PREFIX "tuner-frequency",
                VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
    var_Create( p_this, CFG_PREFIX "tuner-standard",
                VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
    var_Create( p_this, CFG_PREFIX "tuner-country",
                VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
    var_Create( p_this, CFG_PREFIX "tuner-input",
                VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );

    var_Create( p_this, CFG_PREFIX "amtuner-mode",
                VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );

    var_Create( p_this, CFG_PREFIX "video-input", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
    var_Create( p_this, CFG_PREFIX "audio-input", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
    var_Create( p_this, CFG_PREFIX "video-output", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
    var_Create( p_this, CFG_PREFIX "audio-output", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );


    /* Initialize some data */
    p_sys->i_width = i_width;
    p_sys->i_height = i_height;
    p_sys->i_chroma = i_chroma;

    /* Build directshow graph */
    CreateDirectShowGraph( p_sys );

    vlc_mutex_init( &p_sys->lock );
    vlc_cond_init( &p_sys->wait );

    if( !b_use_video && !b_use_audio )
    {
        vlc_dialog_display_error( p_this, _("Capture failed"),
                        _("No video or audio device selected.") );
        return VLC_EGENERIC ;
    }

    if( !b_use_video )
        msg_Dbg( p_this, "skipping video device" ) ;
    bool b_err_video = false ;

    if( b_use_video && OpenDevice( p_this, p_sys, vdevname, 0 ) != VLC_SUCCESS )
    {
        msg_Err( p_this, "can't open video device");
        b_err_video = true ;
    }

    if ( b_use_video && !b_err_video )
    {
        /* Check if we can handle the demuxing ourselves or need to spawn
         * a demuxer module */
        dshow_stream_t *p_stream = *(p_sys->pp_streams.rbegin());

        if( p_stream->mt.majortype == MEDIATYPE_Video )
        {
            if( /* Raw DV stream */
                p_stream->i_fourcc == VLC_CODEC_DV ||
                /* Raw MPEG video stream */
                p_stream->i_fourcc == VLC_CODEC_MPGV )
            {
                b_use_audio = false;

                if( b_access_demux )
                {
                    /* Let the access (only) take care of that */
                    return VLC_EGENERIC;
                }
            }
        }

        if( p_stream->mt.majortype == MEDIATYPE_Stream )
        {
            b_use_audio = false;

            if( b_access_demux )
            {
                /* Let the access (only) take care of that */
                return VLC_EGENERIC;
            }

            if( var_GetBool( p_this, CFG_PREFIX "tuner" ) )
            {
                /* FIXME: we do MEDIATYPE_Stream here so we don't do
                 * it twice. */
                ShowTunerProperties( p_this, p_sys->p_capture_graph_builder2.Get(),
                                     p_stream->p_device_filter.Get(), 0 );
            }
        }
    }

    if( !b_use_audio )
        msg_Dbg( p_this, "skipping audio device") ;

    bool b_err_audio = false ;

    if( b_use_audio && OpenDevice( p_this, p_sys, adevname, 1 ) != VLC_SUCCESS )
    {
        msg_Err( p_this, "can't open audio device");
        b_err_audio = true ;
    }

    if( ( b_use_video && b_err_video && b_use_audio && b_err_audio ) ||
        ( !b_use_video && b_use_audio && b_err_audio ) ||
        ( b_use_video && !b_use_audio && b_err_video ) )
    {
        msg_Err( p_this, "FATAL: could not open ANY device" ) ;
        vlc_dialog_display_error( p_this,  _("Capture failed"),
                        _("VLC cannot open ANY capture device. "
                          "Check the error log for details.") );
        return VLC_EGENERIC ;
    }

    for( int i = p_sys->i_crossbar_route_depth-1; i >= 0 ; --i )
    {
        int i_val = var_GetInteger( p_this, CFG_PREFIX "video-input" );
        if( i_val >= 0 )
            p_sys->crossbar_routes[i].VideoInputIndex = i_val;
        i_val = var_GetInteger( p_this, CFG_PREFIX "video-output" );
        if( i_val >= 0 )
            p_sys->crossbar_routes[i].VideoOutputIndex = i_val;
        i_val = var_GetInteger( p_this, CFG_PREFIX "audio-input" );
        if( i_val >= 0 )
            p_sys->crossbar_routes[i].AudioInputIndex = i_val;
        i_val = var_GetInteger( p_this, CFG_PREFIX "audio-output" );
        if( i_val >= 0 )
            p_sys->crossbar_routes[i].AudioOutputIndex = i_val;

        IAMCrossbar *pXbar = p_sys->crossbar_routes[i].pXbar.Get();
        LONG VideoInputIndex = p_sys->crossbar_routes[i].VideoInputIndex;
        LONG VideoOutputIndex = p_sys->crossbar_routes[i].VideoOutputIndex;
        LONG AudioInputIndex = p_sys->crossbar_routes[i].AudioInputIndex;
        LONG AudioOutputIndex = p_sys->crossbar_routes[i].AudioOutputIndex;

        if( SUCCEEDED(pXbar->Route(VideoOutputIndex, VideoInputIndex)) )
        {
            msg_Dbg( p_this, "crossbar at depth %d, routed video "
                     "output %ld to video input %ld", i, VideoOutputIndex,
                     VideoInputIndex );

            if( AudioOutputIndex != -1 && AudioInputIndex != -1 )
            {
                if( SUCCEEDED( pXbar->Route(AudioOutputIndex,
                                            AudioInputIndex)) )
                {
                    msg_Dbg(p_this, "crossbar at depth %d, routed audio "
                            "output %ld to audio input %ld", i,
                            AudioOutputIndex, AudioInputIndex );
                }
            }
        }
        else
            msg_Err( p_this, "crossbar at depth %d could not route video "
                     "output %ld to input %ld", i, VideoOutputIndex, VideoInputIndex );
    }

    /*
    ** Show properties pages from other filters in graph
    */
    if( var_GetBool( p_this, CFG_PREFIX "config" ) )
    {
        for( int i = p_sys->i_crossbar_route_depth-1; i >= 0 ; --i )
        {
            IAMCrossbar *pXbar = p_sys->crossbar_routes[i].pXbar.Get();
            ComPtr<IBaseFilter> p_XF;

            if( SUCCEEDED( pXbar->QueryInterface( IID_IBaseFilter,
                                                  (void**)p_XF.ReleaseAndGetAddressOf() ) ) )
            {
                ShowPropertyPage( p_XF.Get() );
            }
        }
    }

    /* Initialize some data */
    p_sys->i_current_stream = 0;

    if( p_sys->pp_streams.empty() ) return VLC_EGENERIC;

    if( vlc_mta_acquire( p_this ) == false )
    {
        msg_Err( p_this, "Failed to acquire MTA" );
        return VLC_EGENERIC;
    }

    return VLC_SUCCESS;
}

/*****************************************************************************
 * DemuxOpen: open direct show device as an access_demux module
 *****************************************************************************/
static int DemuxOpen( vlc_object_t *p_this )
{
    demux_t      *p_demux = (demux_t *)p_this;
    access_sys_t *p_sys;

    p_sys = (access_sys_t*)calloc( 1, sizeof( access_sys_t ) );
    if( !p_sys )
        return VLC_ENOMEM;
    p_demux->p_sys = (demux_sys_t *)p_sys;

    ComContext ctx( COINIT_MULTITHREADED );

    if( CommonOpen( p_this, p_sys, true ) != VLC_SUCCESS )
    {
        CommonClose( p_this, p_sys );
        return VLC_EGENERIC;
    }

    /* Everything is ready. Let's rock baby */
    msg_Dbg( p_this, "Playing...");
    if( FAILED( p_sys->p_control->Run() ) )
    {
        msg_Err( p_this, "Failed to run graph. Capture device may be in use." );
        CommonClose( p_this, p_sys );
        return VLC_EGENERIC;
    }

    p_demux->pf_demux   = Demux;
    p_demux->pf_control = DemuxControl;
    p_demux->info.i_title = 0;
    p_demux->info.i_seekpoint = 0;

    std::vector<dshow_stream_t*>::iterator it = p_sys->pp_streams.begin();
    std::vector<dshow_stream_t*>::iterator end = p_sys->pp_streams.end();
    for ( ; it != end; ++it )
    {
        dshow_stream_t *p_stream = *it;
        es_format_t fmt;

        if( p_stream->mt.majortype == MEDIATYPE_Video )
        {
            char *psz_aspect = var_CreateGetString( p_this, CFG_PREFIX "aspect-ratio" );
            char *psz_delim = !EMPTY_STR( psz_aspect ) ? strchr( psz_aspect, ':' ) : NULL;

            es_format_Init( &fmt, VIDEO_ES, p_stream->i_fourcc );

            fmt.video.i_width  = p_stream->header.video.bmiHeader.biWidth;
            fmt.video.i_height = p_stream->header.video.bmiHeader.biHeight;

            if( psz_delim )
            {
                fmt.video.i_sar_num = atoi( psz_aspect ) * fmt.video.i_height;
                fmt.video.i_sar_den = atoi( psz_delim + 1 ) * fmt.video.i_width;
            }
            else
            {
                fmt.video.i_sar_num = 4 * fmt.video.i_height;
                fmt.video.i_sar_den = 3 * fmt.video.i_width;
            }
            free( psz_aspect );

            if( !p_stream->header.video.bmiHeader.biCompression )
            {
                /* RGB DIB are coded from bottom to top */
                fmt.video.orientation = ORIENT_BOTTOM_LEFT;
            }

            /* Setup rgb mask for RGB formats */
            if( p_stream->i_fourcc == VLC_CODEC_RGB24 )
            {
                /* This is in RGB format
            http://msdn.microsoft.com/en-us/library/dd407253%28VS.85%29.aspx?ppud=4
                 */
                fmt.video.i_rmask = 0x00ff0000;
                fmt.video.i_gmask = 0x0000ff00;
                fmt.video.i_bmask = 0x000000ff;
            }

            if( p_stream->header.video.AvgTimePerFrame )
            {
                fmt.video.i_frame_rate = 10000000;
                fmt.video.i_frame_rate_base =
                    p_stream->header.video.AvgTimePerFrame;
            }
        }
        else if( p_stream->mt.majortype == MEDIATYPE_Audio )
        {
            es_format_Init( &fmt, AUDIO_ES, p_stream->i_fourcc );

            fmt.audio.i_channels = p_stream->header.audio.nChannels;
            fmt.audio.i_rate = p_stream->header.audio.nSamplesPerSec;
            fmt.audio.i_bitspersample = p_stream->header.audio.wBitsPerSample;
            fmt.audio.i_blockalign = fmt.audio.i_channels *
                fmt.audio.i_bitspersample / 8;
            fmt.i_bitrate = fmt.audio.i_channels * fmt.audio.i_rate *
                fmt.audio.i_bitspersample;
        }

        p_stream->p_es = es_out_Add( p_demux->out, &fmt );
    }

    p_sys->i_start = mdate();
    return VLC_SUCCESS;
}

/*****************************************************************************
 * AccessOpen: open direct show device as an access module
 *****************************************************************************/
static int AccessOpen( vlc_object_t *p_this )
{
    access_t     *p_access = (access_t*)p_this;
    access_sys_t *p_sys;

    p_access->p_sys = p_sys = (access_sys_t*)calloc( 1, sizeof( access_sys_t ) );