/* GStreamer

 * Copyright (C) <2005> Julien Moutte <julien@moutte.net>

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Library General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library 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

 * Library General Public License for more details.

 *

 * You should have received a copy of the GNU Library General Public

 * License along with this library; if not, write to the

 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,

 * Boston, MA 02110-1301, USA.

 */

#ifndef __GST_X_IMAGE_SINK_H__

#define __GST_X_IMAGE_SINK_H__

#include <gst/video/gstvideosink.h>

#ifdef HAVE_XSHM

#include <sys/types.h>

#include <sys/ipc.h>

#include <sys/shm.h>

#endif /* HAVE_XSHM */

#include <X11/Xlib.h>

#include <X11/Xutil.h>

#ifdef HAVE_XSHM

#include <X11/extensions/XShm.h>

#endif /* HAVE_XSHM */

#include <string.h>

#include <math.h>

/* Helper functions */

#include <gst/video/video.h>

G_BEGIN_DECLS

#define GST_TYPE_X_IMAGE_SINK \

  (gst_x_image_sink_get_type())

#define GST_X_IMAGE_SINK(obj) \

  (G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_X_IMAGE_SINK, GstXImageSink))

#define GST_X_IMAGE_SINK_CLASS(klass) \

  (G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_X_IMAGE_SINK, GstXImageSinkClass))

#define GST_IS_X_IMAGE_SINK(obj) \

  (G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_X_IMAGE_SINK))

#define GST_IS_X_IMAGE_SINK_CLASS(klass) \

  (G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_X_IMAGE_SINK))

typedef struct _GstXContext GstXContext;

typedef struct _GstXWindow GstXWindow;

typedef struct _GstXImageSink GstXImageSink;

typedef struct _GstXImageSinkClass GstXImageSinkClass;

#include "ximagepool.h"

/*

 * GstXContext:

 * @disp: the X11 Display of this context

 * @screen: the default Screen of Display @disp

 * @screen_num: the Screen number of @screen

 * @visual: the default Visual of Screen @screen

 * @root: the root Window of Display @disp

 * @white: the value of a white pixel on Screen @screen

 * @black: the value of a black pixel on Screen @screen

 * @depth: the color depth of Display @disp

 * @bpp: the number of bits per pixel on Display @disp

 * @endianness: the endianness of image bytes on Display @disp

 * @width: the width in pixels of Display @disp

 * @height: the height in pixels of Display @disp

 * @widthmm: the width in millimeters of Display @disp

 * @heightmm: the height in millimeters of Display @disp

 * @par: the pixel aspect ratio calculated from @width, @widthmm and @height, 

 * @heightmm ratio

 * @use_xshm: used to known wether of not XShm extension is usable or not even

 * if the Extension is present

 * @caps: the #GstCaps that Display @disp can accept

 *

 * Structure used to store various informations collected/calculated for a

 * Display.

 */

struct _GstXContext

{

  Display *disp;

  Screen *screen;

  gint screen_num;

  Visual *visual;

  Window root;

  gulong white, black;

  gint depth;

  gint bpp;

  gint width, height;

  gint widthmm, heightmm;

  GValue *par;                  /* calculated pixel aspect ratio */

  gboolean use_xshm;

  GstCaps *caps;

  GstCaps *last_caps;

};

/*

 * GstXWindow:

 * @win: the Window ID of this X11 window

 * @width: the width in pixels of Window @win

 * @height: the height in pixels of Window @win

 * @internal: used to remember if Window @win was created internally or passed

 * through the #GstVideoOverlay interface

 * @gc: the Graphical Context of Window @win

 *

 * Structure used to store informations about a Window.

 */

struct _GstXWindow

{

  Window win;

  gint width, height;

  gboolean internal;

  GC gc;

};

/**

 * GstXImageSink:

 * @display_name: the name of the Display we want to render to

 * @xcontext: our instance's #GstXContext

 * @xwindow: the #GstXWindow we are rendering to

 * @ximage: internal #GstXImage used to store incoming buffers and render when

 * not using the buffer_alloc optimization mechanism

 * @cur_image: a reference to the last #GstXImage that was put to @xwindow. It

 * is used when Expose events are received to redraw the latest video frame

 * @event_thread: a thread listening for events on @xwindow and handling them

 * @running: used to inform @event_thread if it should run/shutdown

 * @fps_n: the framerate fraction numerator

 * @fps_d: the framerate fraction denominator

 * @x_lock: used to protect X calls as we are not using the XLib in threaded

 * mode

 * @flow_lock: used to protect data flow routines from external calls such as

 * events from @event_thread or methods from the #GstVideoOverlay interface

 * @par: used to override calculated pixel aspect ratio from @xcontext

 * @pool_lock: used to protect the buffer pool

 * @buffer_pool: a list of #GstXImageBuffer that could be reused at next buffer

 * allocation call

 * @synchronous: used to store if XSynchronous should be used or not (for

 * debugging purpose only)

 * @keep_aspect: used to remember if reverse negotiation scaling should respect

 * aspect ratio

 * @handle_events: used to know if we should handle select XEvents or not

 *

 * The #GstXImageSink data structure.

 */

struct _GstXImageSink

{

  /* Our element stuff */

  GstVideoSink videosink;

  char *display_name;

  GstXContext *xcontext;

  GstXWindow *xwindow;

  GstBuffer *cur_image;

  GThread *event_thread;

  gboolean running;

  GstVideoInfo info;

  /* Framerate numerator and denominator */

  gint fps_n;

  gint fps_d;

  GMutex x_lock;

  GMutex flow_lock;

  /* object-set pixel aspect ratio */

  GValue *par;

  /* the buffer pool */

  GstBufferPool *pool;

  gboolean synchronous;

  gboolean keep_aspect;

  gboolean handle_events;

  gboolean handle_expose;

  gboolean draw_border;

  /* stream metadata */

  gchar *media_title;

};

struct _GstXImageSinkClass

{

  GstVideoSinkClass parent_class;

};

GType gst_x_image_sink_get_type (void);

G_END_DECLS

#endif /* __GST_X_IMAGE_SINK_H__ */