彻底改版2.0
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feiyangqingyun
167
video/playvlc/vlc/vlc2/include/plugins/vlc_vout.h
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167
video/playvlc/vlc/vlc2/include/plugins/vlc_vout.h
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/*****************************************************************************
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* vlc_vout.h: common video definitions
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*****************************************************************************
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* Copyright (C) 1999 - 2008 VLC authors and VideoLAN
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* $Id: b39e49b564e8367df07a2a85ee8bddfac6b548c4 $
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*
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* Authors: Vincent Seguin <seguin@via.ecp.fr>
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* Samuel Hocevar <sam@via.ecp.fr>
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* Olivier Aubert <oaubert 47 videolan d07 org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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#ifndef VLC_VOUT_H_
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#define VLC_VOUT_H_ 1
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/**
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* \file
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* This file defines common video output structures and functions in vlc
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*/
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#include <vlc_picture.h>
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#include <vlc_filter.h>
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#include <vlc_subpicture.h>
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/*****************************************************************************
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* Prototypes
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*****************************************************************************/
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/**
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* \defgroup video_output Video Output
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* This module describes the programming interface for video output threads.
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* It includes functions allowing to open a new thread, send pictures to a
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* thread, and destroy a previously opened video output thread.
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* @{
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*/
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/**
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* Vout configuration
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*/
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typedef struct {
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vout_thread_t *vout;
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vlc_object_t *input;
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bool change_fmt;
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const video_format_t *fmt;
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unsigned dpb_size;
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} vout_configuration_t;
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/**
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* Video output thread private structure
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*/
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typedef struct vout_thread_sys_t vout_thread_sys_t;
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/**
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* Video output thread descriptor
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*
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* Any independent video output device, such as an X11 window or a GGI device,
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* is represented by a video output thread, and described using the following
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* structure.
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*/
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struct vout_thread_t {
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VLC_COMMON_MEMBERS
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/* Private vout_thread data */
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vout_thread_sys_t *p;
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};
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/* Alignment flags */
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#define VOUT_ALIGN_LEFT 0x0001
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#define VOUT_ALIGN_RIGHT 0x0002
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#define VOUT_ALIGN_HMASK 0x0003
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#define VOUT_ALIGN_TOP 0x0004
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#define VOUT_ALIGN_BOTTOM 0x0008
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#define VOUT_ALIGN_VMASK 0x000C
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/*****************************************************************************
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* Prototypes
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*****************************************************************************/
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/**
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* Returns a suitable vout or release the given one.
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*
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* If cfg->fmt is non NULL and valid, a vout will be returned, reusing cfg->vout
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* is possible, otherwise it returns NULL.
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* If cfg->vout is not used, it will be closed and released.
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*
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* You can release the returned value either by vout_Request or vout_Close()
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* followed by a vlc_object_release() or shorter vout_CloseAndRelease()
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*
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* \param object a vlc object
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* \param cfg the video configuration requested.
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* \return a vout
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*/
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VLC_API vout_thread_t * vout_Request( vlc_object_t *object, const vout_configuration_t *cfg );
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#define vout_Request(a,b) vout_Request(VLC_OBJECT(a),b)
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/**
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* This function will close a vout created by vout_Request.
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* The associated vout module is closed.
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* Note: It is not released yet, you'll have to call vlc_object_release()
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* or use the convenient vout_CloseAndRelease().
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*
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* \param p_vout the vout to close
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*/
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VLC_API void vout_Close( vout_thread_t *p_vout );
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/**
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* This function will close a vout created by vout_Create
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* and then release it.
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*
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* \param p_vout the vout to close and release
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*/
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static inline void vout_CloseAndRelease( vout_thread_t *p_vout )
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{
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vout_Close( p_vout );
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vlc_object_release( p_vout );
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}
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/**
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* This function will handle a snapshot request.
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*
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* pp_image, pp_picture and p_fmt can be NULL otherwise they will be
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* set with returned value in case of success.
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*
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* pp_image will hold an encoded picture in psz_format format.
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*
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* i_timeout specifies the time the function will wait for a snapshot to be
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* available.
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*
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*/
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VLC_API int vout_GetSnapshot( vout_thread_t *p_vout,
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block_t **pp_image, picture_t **pp_picture,
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video_format_t *p_fmt,
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const char *psz_format, mtime_t i_timeout );
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VLC_API void vout_ChangeAspectRatio( vout_thread_t *p_vout,
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unsigned int i_num, unsigned int i_den );
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/* */
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VLC_API picture_t * vout_GetPicture( vout_thread_t * );
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VLC_API void vout_PutPicture( vout_thread_t *, picture_t * );
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VLC_API void vout_HoldPicture( vout_thread_t *, picture_t * );
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VLC_API void vout_ReleasePicture( vout_thread_t *, picture_t * );
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/* */
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VLC_API void vout_PutSubpicture( vout_thread_t *, subpicture_t * );
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VLC_API int vout_RegisterSubpictureChannel( vout_thread_t * );
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VLC_API void vout_FlushSubpictureChannel( vout_thread_t *, int );
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VLC_API void vout_EnableFilter( vout_thread_t *, const char *,bool , bool );
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/**@}*/
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#endif /* _VLC_VIDEO_H */
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