crop.c

VLC Player Source Code

                     ( p_vout->output.i_width - p_vout->p_sys->i_width ) / 2;
            p_vout->p_sys->i_y =
                     ( p_vout->output.i_height - p_vout->p_sys->i_height ) / 2;
        }

        /* Check for validity */
        if( p_vout->p_sys->i_x + p_vout->p_sys->i_width
                                                   > p_vout->output.i_width )
        {
            p_vout->p_sys->i_x = 0;
            if( p_vout->p_sys->i_width > p_vout->output.i_width )
            {
                p_vout->p_sys->i_width = p_vout->output.i_width;
            }
        }

        if( p_vout->p_sys->i_y + p_vout->p_sys->i_height
                                                   > p_vout->output.i_height )
        {
            p_vout->p_sys->i_y = 0;
            if( p_vout->p_sys->i_height > p_vout->output.i_height )
            {
                p_vout->p_sys->i_height = p_vout->output.i_height;
            }
        }

        free( psz_var );
    }
    else
#ifdef BEST_AUTOCROP
    if (p_vout->p_sys->i_ratio)
    {
        p_vout->p_sys->i_aspect    =  p_vout->p_sys->i_ratio * 432;
        p_vout->p_sys->i_width  = p_vout->fmt_out.i_visible_width;
        p_vout->p_sys->i_height = p_vout->output.i_aspect
                                * p_vout->output.i_height / p_vout->p_sys->i_aspect
                                * p_vout->p_sys->i_width / p_vout->output.i_width;
        p_vout->p_sys->i_height += p_vout->p_sys->i_height % 2;
        p_vout->p_sys->i_x = p_vout->fmt_out.i_x_offset;
        p_vout->p_sys->i_y = (p_vout->output.i_height - p_vout->p_sys->i_height) / 2;
    }
    else
#endif
    {
        p_vout->p_sys->i_width  = p_vout->fmt_out.i_visible_width;
        p_vout->p_sys->i_height = p_vout->fmt_out.i_visible_height;
        p_vout->p_sys->i_x = p_vout->fmt_out.i_x_offset;
        p_vout->p_sys->i_y = p_vout->fmt_out.i_y_offset;
    }

    /* Pheeew. Parsing done. */
    msg_Dbg( p_vout, "cropping at %ix%i+%i+%i, %sautocropping",
                     p_vout->p_sys->i_width, p_vout->p_sys->i_height,
                     p_vout->p_sys->i_x, p_vout->p_sys->i_y,
                     p_vout->p_sys->b_autocrop ? "" : "not " );
    /* Set current output image properties */
    p_vout->p_sys->i_aspect = p_vout->fmt_out.i_aspect
           * p_vout->fmt_out.i_visible_height / p_vout->p_sys->i_height
           * p_vout->p_sys->i_width / p_vout->fmt_out.i_visible_width;

#ifdef BEST_AUTOCROP
    msg_Info( p_vout, "ratio %d",  p_vout->p_sys->i_aspect / 432);
#endif
    fmt.i_width = fmt.i_visible_width = p_vout->p_sys->i_width;
    fmt.i_height = fmt.i_visible_height = p_vout->p_sys->i_height;
    fmt.i_x_offset = fmt.i_y_offset = 0;
    fmt.i_chroma = p_vout->render.i_chroma;
    fmt.i_aspect = p_vout->p_sys->i_aspect;
    fmt.i_sar_num = p_vout->p_sys->i_aspect * fmt.i_height / fmt.i_width;
    fmt.i_sar_den = VOUT_ASPECT_FACTOR;

    /* Try to open the real video output */
    p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
    if( p_vout->p_sys->p_vout == NULL )
    {
        msg_Err( p_vout, "failed to create vout" );
        intf_UserFatal( p_vout, false, _("Cropping failed"),
                        _("VLC could not open the video output module.") );
        return VLC_EGENERIC;
    }

#ifdef BEST_AUTOCROP
    var_AddCallback( p_vout, "ratio-crop", FilterCallback, NULL );
#endif

    ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );

    ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );

    ADD_PARENT_CALLBACKS( SendEventsToChild );

    return VLC_SUCCESS;
}

/*****************************************************************************
 * End: terminate Crop video thread output method
 *****************************************************************************/
static void End( vout_thread_t *p_vout )
{
    int i_index;

    DEL_PARENT_CALLBACKS( SendEventsToChild );
    if( p_vout->p_sys->p_vout )
        DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );

    /* Free the fake output buffers we allocated */
    for( i_index = I_OUTPUTPICTURES ; i_index ; )
    {
        i_index--;
        free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
    }

    if( p_vout->p_sys->p_vout )
        vout_CloseAndRelease( p_vout->p_sys->p_vout );
}

/*****************************************************************************
 * Destroy: destroy Crop video thread output method
 *****************************************************************************
 * Terminate an output method created by CropCreateOutputMethod
 *****************************************************************************/
static void Destroy( vlc_object_t *p_this )
{
    vout_thread_t *p_vout = (vout_thread_t *)p_this;

    free( p_vout->p_sys );
}

/*****************************************************************************
 * Manage: handle Crop events
 *****************************************************************************
 * This function should be called regularly by video output thread. It manages
 * console events. It returns a non null value on error.
 *****************************************************************************/
static int Manage( vout_thread_t *p_vout )
{
    video_format_t fmt;

    if( !p_vout->p_sys->b_changed )
    {
        return VLC_SUCCESS;
    }

    memset( &fmt, 0, sizeof(video_format_t) );

#ifdef BEST_AUTOCROP
    msg_Dbg( p_vout, "cropping at %ix%i+%i+%i, %sautocropping",
                     p_vout->p_sys->i_width, p_vout->p_sys->i_height,
                     p_vout->p_sys->i_x, p_vout->p_sys->i_y,
                     p_vout->p_sys->b_autocrop ? "" : "not " );

    msg_Info( p_vout, "ratio %d",  p_vout->p_sys->i_aspect / 432);
#endif

    if( p_vout->p_sys->p_vout )
    {
        DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
        vout_CloseAndRelease( p_vout->p_sys->p_vout );
    }

    fmt.i_width = fmt.i_visible_width = p_vout->p_sys->i_width;
    fmt.i_height = fmt.i_visible_height = p_vout->p_sys->i_height;
    fmt.i_x_offset = fmt.i_y_offset = 0;
    fmt.i_chroma = p_vout->render.i_chroma;
    fmt.i_aspect = p_vout->p_sys->i_aspect;
    fmt.i_sar_num = p_vout->p_sys->i_aspect * fmt.i_height / fmt.i_width;
    fmt.i_sar_den = VOUT_ASPECT_FACTOR;

    p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
    if( p_vout->p_sys->p_vout == NULL )
    {
        msg_Err( p_vout, "failed to create vout" );
        intf_UserFatal( p_vout, false, _("Cropping failed"),
                        _("VLC could not open the video output module.") );
        return VLC_EGENERIC;
    }
    ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );

    p_vout->p_sys->b_changed = false;
    p_vout->p_sys->i_lastchange = 0;

    return VLC_SUCCESS;
}

/*****************************************************************************
 * Render: display previously rendered output
 *****************************************************************************
 * This function sends the currently rendered image to Crop image, waits
 * until it is displayed and switches the two rendering buffers, preparing next
 * frame.
 *****************************************************************************/
static void Render( vout_thread_t *p_vout, picture_t *p_pic )
{
    picture_t *p_outpic = NULL;
    int i_plane;

    if( p_vout->p_sys->b_changed )
    {
        return;
    }

    while( ( p_outpic =
                 vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 )
           ) == NULL )
    {
        if( !vlc_object_alive (p_vout) || p_vout->b_error )
        {
            vout_DestroyPicture( p_vout->p_sys->p_vout, p_outpic );
            return;
        }

        msleep( VOUT_OUTMEM_SLEEP );
    }

    vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
    vout_LinkPicture( p_vout->p_sys->p_vout, p_outpic );

    for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
    {
        uint8_t *p_in, *p_out, *p_out_end;
        int i_in_pitch = p_pic->p[i_plane].i_pitch;
        const int i_out_pitch = p_outpic->p[i_plane].i_pitch;
        const int i_copy_pitch = p_outpic->p[i_plane].i_visible_pitch;

        p_in = p_pic->p[i_plane].p_pixels
                /* Skip the right amount of lines */
                + i_in_pitch * ( p_pic->p[i_plane].i_visible_lines *
                                 p_vout->p_sys->i_y / p_vout->output.i_height )
                /* Skip the right amount of columns */
                + i_in_pitch * p_vout->p_sys->i_x / p_vout->output.i_width;

        p_out = p_outpic->p[i_plane].p_pixels;
        p_out_end = p_out + i_out_pitch * p_outpic->p[i_plane].i_visible_lines;

        while( p_out < p_out_end )
        {
            vlc_memcpy( p_out, p_in, i_copy_pitch );
            p_in += i_in_pitch;
            p_out += i_out_pitch;
        }
    }

    vout_UnlinkPicture( p_vout->p_sys->p_vout, p_outpic );
    vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );

    /* The source image may still be in the cache ... parse it! */
    if( p_vout->p_sys->b_autocrop )
    {
        UpdateStats( p_vout, p_pic );
    }
}

#ifdef BEST_AUTOCROP
static bool NonBlackLine(uint8_t *p_in, int i_line, int i_pitch,
                               int i_visible_pitch, int i_lines,
                               int i_lumThreshold, int i_skipCountPercent,
                               int i_nonBlackPixel, int i_chroma)
{
    const int i_col = i_line * i_pitch / i_lines;
    int i_index, i_count = 0;
    int i_skipCount = 0;

    switch(i_chroma)
    {
    // planar YUV
        case VLC_FOURCC('I','4','4','4'):
        case VLC_FOURCC('I','4','2','2'):
        case VLC_FOURCC('I','4','2','0'):
        case VLC_FOURCC('Y','V','1','2'):
        case VLC_FOURCC('I','Y','U','V'):
        case VLC_FOURCC('I','4','1','1'):
        case VLC_FOURCC('I','4','1','0'):
        case VLC_FOURCC('Y','V','U','9'):
        case VLC_FOURCC('Y','U','V','A'):
            i_skipCount = (i_pitch * i_skipCountPercent) / 100;
            for (i_index = i_col/2 + i_skipCount/2;
                 i_index <= i_visible_pitch/2 + i_col/2 - i_skipCount/2;
                 i_index++)
            {
                 i_count += (p_in[i_index] > i_lumThreshold);
            if (i_count > i_nonBlackPixel) break;
            }
            break;
    // packed RGB
        case VLC_FOURCC('R','G','B','2'):    // packed by 1
            i_skipCount = (i_pitch * i_skipCountPercent) / 100;
            for (i_index = i_col/2 + i_skipCount/2;
                 i_index <= i_visible_pitch/2 + i_col/2 - i_skipCount/2;
                 i_index++)
            {
                 i_count += (p_in[i_index] > i_lumThreshold);
            if (i_count > i_nonBlackPixel) break;
            }
            break;
        case VLC_FOURCC('R','V','1','5'):    // packed by 2
        case VLC_FOURCC('R','V','1','6'):    // packed by 2
            i_skipCount = (i_pitch * i_skipCountPercent) / 100;
            for (i_index = i_col/2 + i_skipCount/2 -
                                (i_col/2 + i_skipCount/2) % 2;
                 i_index <= i_visible_pitch/2 + i_col/2 - i_skipCount/2;
                 i_index+=2)