dshow.cpp

video linux conference

    p_sys->p_capture_graph_builder2 = NULL;
    p_sys->p_control = NULL;

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

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

    if( OpenDevice( p_this, p_sys, vdevname, 0 ) != VLC_SUCCESS )
    {
        msg_Err( p_this, "can't open video");
    }
    else
    {
        /* Check if we can handle the demuxing ourselves or need to spawn
         * a demuxer module */
        dshow_stream_t *p_stream = p_sys->pp_streams[p_sys->i_streams-1];

        if( p_stream->mt.majortype == MEDIATYPE_Video )
        {
            if( /* Raw DV stream */
                p_stream->i_fourcc == VLC_FOURCC('d','v','s','l') ||
                p_stream->i_fourcc == VLC_FOURCC('d','v','s','d') ||
                p_stream->i_fourcc == VLC_FOURCC('d','v','h','d') ||
                /* Raw MPEG video stream */
                p_stream->i_fourcc == VLC_FOURCC('m','p','2','v') )
            {
                b_audio = VLC_FALSE;

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

        if( p_stream->mt.majortype == MEDIATYPE_Stream )
        {
            b_audio = VLC_FALSE;

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

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

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

    for( i = p_sys->i_crossbar_route_depth-1; i >= 0 ; --i )
    {
        IAMCrossbar *pXbar = p_sys->crossbar_routes[i].pXbar;
        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 "
                     "ouput %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 "
                            "ouput %ld to audio input %ld", i,
                            AudioOutputIndex, AudioInputIndex );
                }
            }
        }
    }

    /*
    ** Show properties pages from other filters in graph
    */
    var_Get( p_this, "dshow-config", &val );
    if( val.b_bool )
    {
        for( i = p_sys->i_crossbar_route_depth-1; i >= 0 ; --i )
        {
            IAMCrossbar *pXbar = p_sys->crossbar_routes[i].pXbar;
            IBaseFilter *p_XF;

            if( SUCCEEDED( pXbar->QueryInterface( IID_IBaseFilter,
                                                  (void **)&p_XF ) ) )
            {
                ShowPropertyPage( p_XF );
                p_XF->Release();
            }
        }
    }

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

    if( !p_sys->i_streams ) 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;
    int i;

    p_sys = (access_sys_t *)malloc( sizeof( access_sys_t ) );
    memset( p_sys, 0, sizeof( access_sys_t ) );
    p_demux->p_sys = (demux_sys_t *)p_sys;

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

    /* Everything is ready. Let's rock baby */
    msg_Dbg( p_this, "Playing...");
    p_sys->p_control->Run();

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

    for( i = 0; i < p_sys->i_streams; i++ )
    {
        dshow_stream_t *p_stream = p_sys->pp_streams[i];
        es_format_t fmt;

        if( p_stream->mt.majortype == MEDIATYPE_Video )
        {
            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;
            fmt.video.i_aspect = 4 * VOUT_ASPECT_FACTOR / 3;

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

            /* Setup rgb mask for RGB formats */
            if( p_stream->i_fourcc == VLC_FOURCC('R','V','2','4') )
            {
                /* This is in BGR format */
                fmt.video.i_bmask = 0x00ff0000;
                fmt.video.i_gmask = 0x0000ff00;
                fmt.video.i_rmask = 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 );
    }

    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 *)malloc( sizeof( access_sys_t ) );
    memset( p_sys, 0, sizeof( access_sys_t ) );

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

    dshow_stream_t *p_stream = p_sys->pp_streams[0];

    /* Check if we need to force demuxers */
    if( !p_access->psz_demux || !*p_access->psz_demux )
    {
        if( p_stream->i_fourcc == VLC_FOURCC('d','v','s','l') ||
            p_stream->i_fourcc == VLC_FOURCC('d','v','s','d') ||
            p_stream->i_fourcc == VLC_FOURCC('d','v','h','d') )
        {
            p_access->psz_demux = strdup( "rawdv" );
        }
        else if( p_stream->i_fourcc == VLC_FOURCC('m','p','2','v') )
        {
            p_access->psz_demux = "mpgv";
        }
    }

    /* Setup Access */
    p_access->pf_read = NULL;
    p_access->pf_block = ReadCompressed;
    p_access->pf_control = AccessControl;
    p_access->pf_seek = NULL;
    p_access->info.i_update = 0;
    p_access->info.i_size = 0;
    p_access->info.i_pos = 0;
    p_access->info.b_eof = VLC_FALSE;
    p_access->info.i_title = 0;
    p_access->info.i_seekpoint = 0;
    p_access->p_sys = p_sys;

    /* Everything is ready. Let's rock baby */
    msg_Dbg( p_this, "Playing...");
    p_sys->p_control->Run();

    return VLC_SUCCESS;
}

/*****************************************************************************
 * CommonClose: close device
 *****************************************************************************/
static void CommonClose( vlc_object_t *p_this, access_sys_t *p_sys )
{
    msg_Dbg( p_this, "Releasing DirectShow");

    DeleteDirectShowGraph( p_sys );

    /* Uninitialize OLE/COM */
    CoUninitialize();

    for( int i = 0; i < p_sys->i_streams; i++ ) delete p_sys->pp_streams[i];
    if( p_sys->i_streams ) free( p_sys->pp_streams );

    vlc_mutex_destroy( &p_sys->lock );
    vlc_cond_destroy( &p_sys->wait );

    free( p_sys );
}

/*****************************************************************************
 * AccessClose: close device
 *****************************************************************************/
static void AccessClose( vlc_object_t *p_this )
{
    access_t     *p_access = (access_t *)p_this;
    access_sys_t *p_sys    = p_access->p_sys;

    /* Stop capturing stuff */
    p_sys->p_control->Stop();

    CommonClose( p_this, p_sys );
}

/*****************************************************************************
 * DemuxClose: close device
 *****************************************************************************/
static void DemuxClose( vlc_object_t *p_this )
{
    demux_t      *p_demux = (demux_t *)p_this;
    access_sys_t *p_sys   = (access_sys_t *)p_demux->p_sys;

    /* Stop capturing stuff */
    p_sys->p_control->Stop();

    CommonClose( p_this, p_sys );
}

/****************************************************************************
 * ConnectFilters
 ****************************************************************************/
static bool ConnectFilters( vlc_object_t *p_this, access_sys_t *p_sys,
                            IBaseFilter *p_filter,
                            CaptureFilter *p_capture_filter )
{
    CapturePin *p_input_pin = p_capture_filter->CustomGetPin();

    AM_MEDIA_TYPE mediaType = p_input_pin->CustomGetMediaType();

    if( p_sys->p_capture_graph_builder2 )
    {
        if( FAILED(p_sys->p_capture_graph_builder2->
                RenderStream( &PIN_CATEGORY_CAPTURE, &mediaType.majortype,
                              p_filter, 0, (IBaseFilter *)p_capture_filter )) )
        {
            return false;
        }

        // Sort out all the possible video inputs
        // The class needs to be given the capture filters ANALOGVIDEO input pin
        IEnumPins *pins = 0;
        if( ( mediaType.majortype == MEDIATYPE_Video ||
              mediaType.majortype == MEDIATYPE_Stream ) &&
            SUCCEEDED(p_filter->EnumPins(&pins)) )
        {
            IPin        *pP = 0;
            ULONG        n;
            PIN_INFO     pinInfo;
            BOOL         Found = FALSE;
            IKsPropertySet *pKs=0;
            GUID guid;
            DWORD dw;

            while( !Found && ( S_OK == pins->Next(1, &pP, &n) ) )
            {
                if( S_OK == pP->QueryPinInfo(&pinInfo) )
                {
                    // is this pin an ANALOGVIDEOIN input pin?
                    if( pinInfo.dir == PINDIR_INPUT &&
                        pP->QueryInterface( IID_IKsPropertySet,
                                            (void **)&pKs ) == S_OK )
                    {
                        if( pKs->Get( AMPROPSETID_Pin,
                                      AMPROPERTY_PIN_CATEGORY, NULL, 0,
                                      &guid, sizeof(GUID), &dw ) == S_OK )
                        {
                            if( guid == PIN_CATEGORY_ANALOGVIDEOIN )
                            {
                                // recursively search crossbar routes
                                FindCrossbarRoutes( p_this, p_sys, pP, 0 );