vout.c
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上传日期:2009-03-27
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- /*****************************************************************************
- * vout_dummy.c: Dummy video output display method for testing purposes
- *****************************************************************************
- * Copyright (C) 2000, 2001 VideoLAN
- * $Id: vout.c 8568 2004-08-29 12:40:33Z gbazin $
- *
- * Authors: Samuel Hocevar <sam@zoy.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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
- *****************************************************************************/
- /*****************************************************************************
- * Preamble
- *****************************************************************************/
- #include <stdlib.h> /* free() */
- #include <string.h> /* strerror() */
- #include <vlc/vlc.h>
- #include <vlc/vout.h>
- #define DUMMY_WIDTH 16
- #define DUMMY_HEIGHT 16
- #define DUMMY_MAX_DIRECTBUFFERS 10
- /*****************************************************************************
- * Local prototypes
- *****************************************************************************/
- static int Init ( vout_thread_t * );
- static void End ( vout_thread_t * );
- static int Manage ( vout_thread_t * );
- static void Render ( vout_thread_t *, picture_t * );
- static void Display ( vout_thread_t *, picture_t * );
- static void SetPalette ( vout_thread_t *, uint16_t *, uint16_t *, uint16_t * );
- /*****************************************************************************
- * OpenVideo: activates dummy video thread output method
- *****************************************************************************
- * This function initializes a dummy vout method.
- *****************************************************************************/
- int E_(OpenVideo) ( vlc_object_t *p_this )
- {
- vout_thread_t * p_vout = (vout_thread_t *)p_this;
- p_vout->pf_init = Init;
- p_vout->pf_end = End;
- p_vout->pf_manage = Manage;
- p_vout->pf_render = Render;
- p_vout->pf_display = Display;
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * Init: initialize dummy video thread output method
- *****************************************************************************/
- static int Init( vout_thread_t *p_vout )
- {
- int i_index, i_chroma;
- char *psz_chroma;
- picture_t *p_pic;
- vlc_bool_t b_chroma = 0;
- psz_chroma = config_GetPsz( p_vout, "dummy-chroma" );
- if( psz_chroma )
- {
- if( strlen( psz_chroma ) >= 4 )
- {
- i_chroma = VLC_FOURCC( psz_chroma[0], psz_chroma[1],
- psz_chroma[2], psz_chroma[3] );
- b_chroma = 1;
- }
- free( psz_chroma );
- }
- I_OUTPUTPICTURES = 0;
- /* Initialize the output structure */
- if( b_chroma )
- {
- msg_Dbg( p_vout, "forcing chroma 0x%.8x (%4.4s)",
- i_chroma, (char*)&i_chroma );
- p_vout->output.i_chroma = i_chroma;
- if ( i_chroma == VLC_FOURCC( 'R', 'G', 'B', '2' ) )
- {
- p_vout->output.pf_setpalette = SetPalette;
- }
- p_vout->output.i_width = p_vout->render.i_width;
- p_vout->output.i_height = p_vout->render.i_height;
- p_vout->output.i_aspect = p_vout->render.i_aspect;
- }
- else
- {
- /* Use same chroma as input */
- p_vout->output.i_chroma = p_vout->render.i_chroma;
- p_vout->output.i_rmask = p_vout->render.i_rmask;
- p_vout->output.i_gmask = p_vout->render.i_gmask;
- p_vout->output.i_bmask = p_vout->render.i_bmask;
- p_vout->output.i_width = p_vout->render.i_width;
- p_vout->output.i_height = p_vout->render.i_height;
- p_vout->output.i_aspect = p_vout->render.i_aspect;
- }
- /* Try to initialize DUMMY_MAX_DIRECTBUFFERS direct buffers */
- while( I_OUTPUTPICTURES < DUMMY_MAX_DIRECTBUFFERS )
- {
- p_pic = NULL;
- /* Find an empty picture slot */
- for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
- {
- if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
- {
- p_pic = p_vout->p_picture + i_index;
- break;
- }
- }
- /* Allocate the picture */
- if( p_pic == NULL )
- {
- break;
- }
- vout_AllocatePicture( VLC_OBJECT(p_vout), p_pic, p_vout->output.i_chroma,
- p_vout->output.i_width, p_vout->output.i_height,
- p_vout->output.i_aspect );
- if( p_pic->i_planes == 0 )
- {
- break;
- }
- p_pic->i_status = DESTROYED_PICTURE;
- p_pic->i_type = DIRECT_PICTURE;
- PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
- I_OUTPUTPICTURES++;
- }
- return( 0 );
- }
- /*****************************************************************************
- * End: terminate dummy video thread output method
- *****************************************************************************/
- static void End( vout_thread_t *p_vout )
- {
- int i_index;
- /* Free the fake output buffers we allocated */
- for( i_index = I_OUTPUTPICTURES ; i_index ; )
- {
- i_index--;
- free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
- }
- }
- /*****************************************************************************
- * Manage: handle dummy 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 )
- {
- return( 0 );
- }
- /*****************************************************************************
- * Render: render previously calculated output
- *****************************************************************************/
- static void Render( vout_thread_t *p_vout, picture_t *p_pic )
- {
- /* No need to do anything, the fake direct buffers stay as they are */
- }
- /*****************************************************************************
- * Display: displays previously rendered output
- *****************************************************************************/
- static void Display( vout_thread_t *p_vout, picture_t *p_pic )
- {
- /* No need to do anything, the fake direct buffers stay as they are */
- }
- /*****************************************************************************
- * SetPalette: set the palette for the picture
- *****************************************************************************/
- static void SetPalette ( vout_thread_t *p_vout,
- uint16_t *red, uint16_t *green, uint16_t *blue )
- {
- /* No need to do anything, the fake direct buffers stay as they are */
- }