sdl.c

uclinux 下的vlc播放器源代码

    i_flags |= p_vout->b_fullscreen ? SDL_FULLSCREEN : SDL_RESIZABLE;

    i_bpp = SDL_VideoModeOK( p_vout->p_sys->i_width, p_vout->p_sys->i_height,
                             SDL_DEFAULT_BPP, i_flags );
    if( i_bpp == 0 )
    {
        msg_Err( p_vout, "no video mode available" );
        return VLC_EGENERIC;
    }

    p_vout->p_sys->p_display = SDL_SetVideoMode( p_vout->p_sys->i_width,
                                                 p_vout->p_sys->i_height,
                                                 i_bpp, i_flags );

    if( p_vout->p_sys->p_display == NULL )
    {
        msg_Err( p_vout, "cannot set video mode" );
        return VLC_EGENERIC;
    }

    SDL_LockSurface( p_vout->p_sys->p_display );

    /* Choose the chroma we will try first. */
    switch( p_vout->render.i_chroma )
    {
        case VLC_FOURCC('Y','U','Y','2'):
        case VLC_FOURCC('Y','U','N','V'):
            p_vout->output.i_chroma = VLC_FOURCC('Y','U','Y','2');
            i_sdl_chroma = SDL_YUY2_OVERLAY;
            break;
        case VLC_FOURCC('U','Y','V','Y'):
        case VLC_FOURCC('U','Y','N','V'):
        case VLC_FOURCC('Y','4','2','2'):
            p_vout->output.i_chroma = VLC_FOURCC('U','Y','V','Y');
            i_sdl_chroma = SDL_UYVY_OVERLAY;
            break;
        case VLC_FOURCC('Y','V','Y','U'):
            p_vout->output.i_chroma = VLC_FOURCC('Y','V','Y','U');
            i_sdl_chroma = SDL_YVYU_OVERLAY;
            break;
        case VLC_FOURCC('Y','V','1','2'):
        case VLC_FOURCC('I','4','2','0'):
        case VLC_FOURCC('I','Y','U','V'):
        default:
            p_vout->output.i_chroma = VLC_FOURCC('Y','V','1','2');
            i_sdl_chroma = SDL_YV12_OVERLAY;
            break;
    }

    p_vout->p_sys->p_overlay =
        SDL_CreateYUVOverlay( 32, 32, i_sdl_chroma, p_vout->p_sys->p_display );
    /* FIXME: if the first overlay we find is software, don't stop,
     * because we may find a hardware one later ... */

    /* If this best choice failed, fall back to other chromas */
    if( p_vout->p_sys->p_overlay == NULL )
    {
        p_vout->output.i_chroma = VLC_FOURCC('I','Y','U','V');
        p_vout->p_sys->p_overlay =
            SDL_CreateYUVOverlay( 32, 32, SDL_IYUV_OVERLAY,
                                  p_vout->p_sys->p_display );
    }

    if( p_vout->p_sys->p_overlay == NULL )
    {
        p_vout->output.i_chroma = VLC_FOURCC('Y','V','1','2');
        p_vout->p_sys->p_overlay =
            SDL_CreateYUVOverlay( 32, 32, SDL_YV12_OVERLAY,
                                  p_vout->p_sys->p_display );
    }

    if( p_vout->p_sys->p_overlay == NULL )
    {
        p_vout->output.i_chroma = VLC_FOURCC('Y','U','Y','2');
        p_vout->p_sys->p_overlay =
            SDL_CreateYUVOverlay( 32, 32, SDL_YUY2_OVERLAY,
                                  p_vout->p_sys->p_display );
    }

    if( p_vout->p_sys->p_overlay == NULL )
    {
        msg_Warn( p_vout, "no SDL overlay for 0x%.8x (%4.4s)",
                  p_vout->render.i_chroma, (char*)&p_vout->render.i_chroma );

        switch( p_vout->p_sys->p_display->format->BitsPerPixel )
        {
            case 8:
                p_vout->output.i_chroma = VLC_FOURCC('R','G','B','2');
                p_vout->output.pf_setpalette = SetPalette;
                break;
            case 15:
                p_vout->output.i_chroma = VLC_FOURCC('R','V','1','5');
                break;
            case 16:
                p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6');
                break;
            case 24:
                p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4');
                break;
            case 32:
                p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2');
                break;
            default:
                msg_Err( p_vout, "unknown screen depth %i",
                         p_vout->p_sys->p_display->format->BitsPerPixel );
                SDL_UnlockSurface( p_vout->p_sys->p_display );
                SDL_FreeSurface( p_vout->p_sys->p_display );
                return VLC_EGENERIC;
        }

        p_vout->output.i_rmask = p_vout->p_sys->p_display->format->Rmask;
        p_vout->output.i_gmask = p_vout->p_sys->p_display->format->Gmask;
        p_vout->output.i_bmask = p_vout->p_sys->p_display->format->Bmask;

        SDL_WM_SetCaption( VOUT_TITLE " (software RGB SDL output)",
                           VOUT_TITLE " (software RGB SDL output)" );
    }
    else
    {
        if( p_vout->p_sys->p_overlay->hw_overlay )
        {
            SDL_WM_SetCaption( VOUT_TITLE " (hardware YUV SDL output)",
                               VOUT_TITLE " (hardware YUV SDL output)" );
        }
        else
        {
            SDL_WM_SetCaption( VOUT_TITLE " (software YUV SDL output)",
                               VOUT_TITLE " (software YUV SDL output)" );
        }
    }

    SDL_EventState( SDL_KEYUP, SDL_IGNORE );               /* ignore keys up */

    return VLC_SUCCESS;
}

/*****************************************************************************
 * CloseDisplay: close and reset SDL device
 *****************************************************************************
 * This function returns all resources allocated by OpenDisplay and restore
 * the original state of the device.
 *****************************************************************************/
static void CloseDisplay( vout_thread_t *p_vout )
{
    SDL_FreeYUVOverlay( p_vout->p_sys->p_overlay );
    SDL_UnlockSurface ( p_vout->p_sys->p_display );
    SDL_FreeSurface( p_vout->p_sys->p_display );
}

/*****************************************************************************
 * NewPicture: allocate a picture
 *****************************************************************************
 * Returns 0 on success, -1 otherwise
 *****************************************************************************/
static int NewPicture( vout_thread_t *p_vout, picture_t *p_pic )
{
    int i_width  = p_vout->output.i_width;
    int i_height = p_vout->output.i_height;

    if( p_vout->p_sys->p_overlay == NULL )
    {
        /* RGB picture */
        if( p_vout->p_sys->i_surfaces )
        {
            /* We already allocated this surface, return */
            return VLC_EGENERIC;
        }

        p_pic->p_sys = malloc( sizeof( picture_sys_t ) );

        if( p_pic->p_sys == NULL )
        {
            return VLC_ENOMEM;
        }

        switch( p_vout->p_sys->p_display->format->BitsPerPixel )
        {
            case 8:
                p_pic->p->i_pixel_pitch = 1;
                break;
            case 15:
            case 16:
                p_pic->p->i_pixel_pitch = 2;
                break;
            case 24:
            case 32:
                p_pic->p->i_pixel_pitch = 4;
                break;
            default:
                return VLC_EGENERIC;
        }

        p_pic->p->p_pixels = p_vout->p_sys->p_display->pixels;
        p_pic->p->i_lines = p_vout->p_sys->p_display->h;
        p_pic->p->i_visible_lines = p_vout->p_sys->p_display->h;
        p_pic->p->i_pitch = p_vout->p_sys->p_display->pitch;
        p_pic->p->i_visible_pitch =
            p_pic->p->i_pixel_pitch * p_vout->p_sys->p_display->w;

        p_vout->p_sys->i_surfaces++;

        p_pic->i_planes = 1;
    }
    else
    {
        p_pic->p_sys = malloc( sizeof( picture_sys_t ) );

        if( p_pic->p_sys == NULL )
        {
            return VLC_ENOMEM;
        }

        p_pic->p_sys->p_overlay =
            SDL_CreateYUVOverlay( i_width, i_height,
                                  p_vout->output.i_chroma,
                                  p_vout->p_sys->p_display );

        if( p_pic->p_sys->p_overlay == NULL )
        {
            free( p_pic->p_sys );
            return VLC_EGENERIC;
        }

        SDL_LockYUVOverlay( p_pic->p_sys->p_overlay );

        p_pic->Y_PIXELS = p_pic->p_sys->p_overlay->pixels[0];
        p_pic->p[Y_PLANE].i_lines = p_pic->p_sys->p_overlay->h;
        p_pic->p[Y_PLANE].i_visible_lines = p_pic->p_sys->p_overlay->h;
        p_pic->p[Y_PLANE].i_pitch = p_pic->p_sys->p_overlay->pitches[0];

        switch( p_vout->output.i_chroma )
        {
        case SDL_YV12_OVERLAY:
            p_pic->p[Y_PLANE].i_pixel_pitch = 1;
            p_pic->p[Y_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w;

            p_pic->U_PIXELS = p_pic->p_sys->p_overlay->pixels[2];
            p_pic->p[U_PLANE].i_lines = p_pic->p_sys->p_overlay->h / 2;
            p_pic->p[U_PLANE].i_visible_lines = p_pic->p_sys->p_overlay->h / 2;
            p_pic->p[U_PLANE].i_pitch = p_pic->p_sys->p_overlay->pitches[2];
            p_pic->p[U_PLANE].i_pixel_pitch = 1;
            p_pic->p[U_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w / 2;

            p_pic->V_PIXELS = p_pic->p_sys->p_overlay->pixels[1];
            p_pic->p[V_PLANE].i_lines = p_pic->p_sys->p_overlay->h / 2;
            p_pic->p[V_PLANE].i_visible_lines = p_pic->p_sys->p_overlay->h / 2;
            p_pic->p[V_PLANE].i_pitch = p_pic->p_sys->p_overlay->pitches[1];
            p_pic->p[V_PLANE].i_pixel_pitch = 1;
            p_pic->p[V_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w / 2;

            p_pic->i_planes = 3;
            break;

        case SDL_IYUV_OVERLAY:
            p_pic->p[Y_PLANE].i_pixel_pitch = 1;
            p_pic->p[Y_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w;

            p_pic->U_PIXELS = p_pic->p_sys->p_overlay->pixels[1];
            p_pic->p[U_PLANE].i_lines = p_pic->p_sys->p_overlay->h / 2;
            p_pic->p[U_PLANE].i_visible_lines = p_pic->p_sys->p_overlay->h / 2;
            p_pic->p[U_PLANE].i_pitch = p_pic->p_sys->p_overlay->pitches[1];
            p_pic->p[U_PLANE].i_pixel_pitch = 1;
            p_pic->p[U_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w / 2;

            p_pic->V_PIXELS = p_pic->p_sys->p_overlay->pixels[2];
            p_pic->p[V_PLANE].i_lines = p_pic->p_sys->p_overlay->h / 2;
            p_pic->p[V_PLANE].i_visible_lines = p_pic->p_sys->p_overlay->h / 2;
            p_pic->p[V_PLANE].i_pitch = p_pic->p_sys->p_overlay->pitches[2];
            p_pic->p[V_PLANE].i_pixel_pitch = 1;
            p_pic->p[V_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w / 2;

            p_pic->i_planes = 3;
            break;

        default:
            p_pic->p[Y_PLANE].i_pixel_pitch = 2;
            p_pic->p[U_PLANE].i_visible_pitch = p_pic->p_sys->p_overlay->w * 2;

            p_pic->i_planes = 1;
            break;
        }
    }

    return VLC_SUCCESS;
}

/*****************************************************************************
 * SetPalette: sets an 8 bpp palette
 *****************************************************************************/
static void SetPalette( vout_thread_t *p_vout,
                        uint16_t *red, uint16_t *green, uint16_t *blue )
{
    SDL_Color colors[256];
    int i;

    /* Fill colors with color information */
    for( i = 0; i < 256; i++ )
    {
        colors[ i ].r = red[ i ] >> 8;
        colors[ i ].g = green[ i ] >> 8;
        colors[ i ].b = blue[ i ] >> 8;
    }

    /* Set palette */
    if( SDL_SetColors( p_vout->p_sys->p_display, colors, 0, 256 ) == 0 )
    {
        msg_Err( p_vout, "failed to set palette" );
    }
}