/*****************************************************************************
 * vlc_video.h: common video definitions
 *****************************************************************************
 * Copyright (C) 1999 - 2008 the VideoLAN team
 * $Id: e739d93611b9fa43335963ba4735d2a6a0126fb3 $
 *
 * Authors: Vincent Seguin <seguin@via.ecp.fr>
 *          Samuel Hocevar <sam@via.ecp.fr>
 *          Olivier Aubert <oaubert 47 videolan d07 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 *****************************************************************************/

#ifndef VLC_VOUT_H_
#define VLC_VOUT_H_ 1

/**
 * \file
 * This file defines common video output structures and functions in vlc
 */

#include <vlc_picture.h>
#include <vlc_filter.h>
#include <vlc_subpicture.h>

/**
 * Video picture heap, either render (to store pictures used
 * by the decoder) or output (to store pictures displayed by the vout plugin)
 */
struct picture_heap_t
{
    int i_pictures;                                   /**< current heap size */

    /* \name Picture static properties
     * Those properties are fixed at initialization and should NOT be modified
     * @{
     */
    unsigned int i_width;                                 /**< picture width */
    unsigned int i_height;                               /**< picture height */
    vlc_fourcc_t i_chroma;                               /**< picture chroma */
    unsigned int i_aspect;                                 /**< aspect ratio */
    /**@}*/

    /* Real pictures */
    picture_t*      pp_picture[VOUT_MAX_PICTURES];             /**< pictures */
    int             i_last_used_pic;              /**< last used pic in heap */
    bool            b_allow_modify_pics;

    /* Stuff used for truecolor RGB planes */
    uint32_t i_rmask; int i_rrshift, i_lrshift;
    uint32_t i_gmask; int i_rgshift, i_lgshift;
    uint32_t i_bmask; int i_rbshift, i_lbshift;

    /** Stuff used for palettized RGB planes */
    void (* pf_setpalette) ( vout_thread_t *, uint16_t *, uint16_t *, uint16_t * );
};

/*****************************************************************************
 * Prototypes
 *****************************************************************************/

/**
 * Initialise different fields of a picture_t and allocates the picture buffer.
 * \param p_this a vlc object
 * \param p_pic pointer to the picture structure.
 * \param i_chroma the wanted chroma for the picture.
 * \param i_width the wanted width for the picture.
 * \param i_height the wanted height for the picture.
 * \param i_aspect the wanted aspect ratio for the picture.
 */
VLC_EXPORT( int, vout_AllocatePicture,( vlc_object_t *p_this, picture_t *p_pic, uint32_t i_chroma, int i_width, int i_height, int i_sar_num, int i_sar_den ) );
#define vout_AllocatePicture(a,b,c,d,e,f,g) \
        vout_AllocatePicture(VLC_OBJECT(a),b,c,d,e,f,g)

/**
 * \defgroup video_output Video Output
 * This module describes the programming interface for video output threads.
 * It includes functions allowing to open a new thread, send pictures to a
 * thread, and destroy a previously opened video output thread.
 * @{
 */

/**
 * Video ouput thread private structure
 */
typedef struct vout_thread_sys_t vout_thread_sys_t;

/**
 * Video output thread descriptor
 *
 * Any independent video output device, such as an X11 window or a GGI device,
 * is represented by a video output thread, and described using the following
 * structure.
 */
struct vout_thread_t
{
    VLC_COMMON_MEMBERS
    bool                b_error;

    /** \name Thread properties and locks */
    /**@{*/
    vlc_mutex_t         picture_lock;                 /**< picture heap lock */
    vlc_mutex_t         change_lock;                 /**< thread change lock */
    vout_sys_t *        p_sys;                     /**< system output method */
    /**@}*/

    /** \name Current display properties */
    /**@{*/
    uint16_t            i_changes;          /**< changes made to the thread.
                                                      \see \ref vout_changes */
    unsigned            b_fullscreen:1;       /**< toogle fullscreen display */
    unsigned            b_autoscale:1;      /**< auto scaling picture or not */
    unsigned            b_on_top:1; /**< stay always on top of other windows */
    int                 i_zoom;               /**< scaling factor if no auto */
    unsigned int        i_window_width;              /**< video window width */
    unsigned int        i_window_height;            /**< video window height */
    unsigned int        i_alignment;          /**< video alignment in window */

    /**@}*/

    /** \name Plugin used and shortcuts to access its capabilities */
    /**@{*/
    module_t *   p_module;
    int       ( *pf_init )       ( vout_thread_t * );
    void      ( *pf_end )        ( vout_thread_t * );
    int       ( *pf_manage )     ( vout_thread_t * );
    void      ( *pf_render )     ( vout_thread_t *, picture_t * );
    void      ( *pf_display )    ( vout_thread_t *, picture_t * );
    void      ( *pf_swap )       ( vout_thread_t * );         /* OpenGL only */
    int       ( *pf_lock )       ( vout_thread_t * );         /* OpenGL only */
    void      ( *pf_unlock )     ( vout_thread_t * );         /* OpenGL only */
    int       ( *pf_control )    ( vout_thread_t *, int, va_list );
    /**@}*/

    /** \name Video heap and translation tables */
    /**@{*/
    int                 i_heap_size;                          /**< heap size */
    picture_heap_t      render;                       /**< rendered pictures */
    picture_heap_t      output;                          /**< direct buffers */

    video_format_t      fmt_render;      /* render format (from the decoder) */
    video_format_t      fmt_in;            /* input (modified render) format */
    video_format_t      fmt_out;     /* output format (for the video output) */
    /**@}*/

    /* Picture heap */
    picture_t           p_picture[2*VOUT_MAX_PICTURES+1];      /**< pictures */

    /* Subpicture unit */
    spu_t          *p_spu;

    /* Video output configuration */
    config_chain_t *p_cfg;

    /* Private vout_thread data */
    vout_thread_sys_t *p;
};

#define I_OUTPUTPICTURES p_vout->output.i_pictures
#define PP_OUTPUTPICTURE p_vout->output.pp_picture
#define I_RENDERPICTURES p_vout->render.i_pictures
#define PP_RENDERPICTURE p_vout->render.pp_picture

/** \defgroup vout_changes Flags for changes
 * These flags are set in the vout_thread_t::i_changes field when another
 * thread changed a variable
 * @{
 */
/** b_info changed */
#define VOUT_INFO_CHANGE        0x0001
/** b_interface changed */
#define VOUT_INTF_CHANGE        0x0004
/** b_autoscale changed */
#define VOUT_SCALE_CHANGE       0x0008
/** b_on_top changed */
#define VOUT_ON_TOP_CHANGE	0x0010
/** b_cursor changed */
#define VOUT_CURSOR_CHANGE      0x0020
/** b_fullscreen changed */
#define VOUT_FULLSCREEN_CHANGE  0x0040
/** i_zoom changed */
#define VOUT_ZOOM_CHANGE        0x0080
/** size changed */
#define VOUT_SIZE_CHANGE        0x0200
/** depth changed */
#define VOUT_DEPTH_CHANGE       0x0400
/** change chroma tables */
#define VOUT_CHROMA_CHANGE      0x0800
/** cropping parameters changed */
#define VOUT_CROP_CHANGE        0x1000
/** aspect ratio changed */
#define VOUT_ASPECT_CHANGE      0x2000
/** change/recreate picture buffers */
#define VOUT_PICTURE_BUFFERS_CHANGE 0x4000
/**@}*/

/* Alignment flags */
#define VOUT_ALIGN_LEFT         0x0001
#define VOUT_ALIGN_RIGHT        0x0002
#define VOUT_ALIGN_HMASK        0x0003
#define VOUT_ALIGN_TOP          0x0004
#define VOUT_ALIGN_BOTTOM       0x0008
#define VOUT_ALIGN_VMASK        0x000C

#define MAX_JITTER_SAMPLES      20

/* scaling factor (applied to i_zoom in vout_thread_t) */
#define ZOOM_FP_FACTOR          1000

/*****************************************************************************
 * Prototypes
 *****************************************************************************/

/**
 * This function will
 *  - returns a suitable vout (if requested by a non NULL p_fmt)
 *  - recycles an old vout (if given) by either destroying it or by saving it
 *  for latter usage.
 *
 * The purpose of this function is to avoid unnecessary creation/destruction of
 * vout (and to allow optional vout reusing).
 *
 * You can call vout_Request on a vout created by vout_Create or by a previous
 * call to vout_Request.
 * You can release the returned value either by vout_Request or vout_Close()
 * followed by a vlc_object_release() or shorter vout_CloseAndRelease()
 *
 * \param p_this a vlc object
 * \param p_vout a vout candidate
 * \param p_fmt the video format requested or NULL
 * \return a vout if p_fmt is non NULL and the request is successfull, NULL
 * otherwise
 */
VLC_EXPORT( vout_thread_t *, vout_Request, ( vlc_object_t *p_this, vout_thread_t *p_vout, video_format_t *p_fmt ) );
#define vout_Request(a,b,c) vout_Request(VLC_OBJECT(a),b,c)

/**
 * This function will create a suitable vout for a given p_fmt. It will never
 * reuse an already existing unused vout.
 *
 * You have to call either vout_Close or vout_Request on the returned value
 * \param p_this a vlc object to which the returned vout will be attached
 * \param p_fmt the video format requested
 * \return a vout if the request is successfull, NULL otherwise
 */
VLC_EXPORT( vout_thread_t *, vout_Create, ( vlc_object_t *p_this, video_format_t *p_fmt ) );
#define vout_Create(a,b) vout_Create(VLC_OBJECT(a),b)

/**
 * This function will close a vout created by vout_Create or vout_Request.
 * The associated vout module is closed.
 * Note: It is not released yet, you'll have to call vlc_object_release()
 * or use the convenient vout_CloseAndRelease().
 *
 * \param p_vout the vout to close
 */
VLC_EXPORT( void,            vout_Close,        ( vout_thread_t *p_vout ) );

/**
 * This function will close a vout created by vout_Create
 * and then release it.
 *
 * \param p_vout the vout to close and release
 */
static inline void vout_CloseAndRelease( vout_thread_t *p_vout )
{
    vout_Close( p_vout );
    vlc_object_release( p_vout );
}

/**
 * This function will handle a snapshot request.
 *
 * pp_image, pp_picture and p_fmt can be NULL otherwise they will be
 * set with returned value in case of success.
 *
 * pp_image will hold an encoded picture in psz_format format.
 *
 * i_timeout specifies the time the function will wait for a snapshot to be
 * available.
 *
 */
VLC_EXPORT( int, vout_GetSnapshot, ( vout_thread_t *p_vout,
                                     block_t **pp_image, picture_t **pp_picture,
                                     video_format_t *p_fmt,
                                     const char *psz_format, mtime_t i_timeout ) );

/* */
VLC_EXPORT( int,             vout_ChromaCmp,      ( uint32_t, uint32_t ) );

VLC_EXPORT( picture_t *,     vout_CreatePicture,  ( vout_thread_t *, bool, bool, unsigned int ) );
VLC_EXPORT( void,            vout_DestroyPicture, ( vout_thread_t *, picture_t * ) );
VLC_EXPORT( void,            vout_DisplayPicture, ( vout_thread_t *, picture_t * ) );
VLC_EXPORT( void,            vout_LinkPicture,    ( vout_thread_t *, picture_t * ) );
VLC_EXPORT( void,            vout_UnlinkPicture,  ( vout_thread_t *, picture_t * ) );
VLC_EXPORT( void,            vout_PlacePicture,   ( const vout_thread_t *, unsigned int, unsigned int, unsigned int *, unsigned int *, unsigned int *, unsigned int * ) );

/**
 * Return the spu_t object associated to a vout_thread_t.
 *
 * The return object is valid only as long as the vout is. You must not
 * release the spu_t object returned.
 * It cannot return NULL so no need to check.
 */
VLC_EXPORT( spu_t *, vout_GetSpu, ( vout_thread_t * ) );

void vout_IntfInit( vout_thread_t * );
VLC_EXPORT( void, vout_EnableFilter, ( vout_thread_t *, const char *,bool , bool  ) );


static inline int vout_vaControl( vout_thread_t *p_vout, int i_query,
                                  va_list args )
{
    if( p_vout->pf_control )
        return p_vout->pf_control( p_vout, i_query, args );
    else
        return VLC_EGENERIC;
}

static inline int vout_Control( vout_thread_t *p_vout, int i_query, ... )
{
    va_list args;
    int i_result;

    va_start( args, i_query );
    i_result = vout_vaControl( p_vout, i_query, args );
    va_end( args );
    return i_result;
}

enum output_query_e
{
    VOUT_SET_STAY_ON_TOP=1, /* arg1= bool       res=    */
    VOUT_SET_VIEWPORT,      /* arg1= view rect, arg2=clip rect, res= */
    VOUT_REDRAW_RECT,       /* arg1= area rect, res= */
};

/**@}*/

#endif /* _VLC_VIDEO_H */