gstreamer/gst-libs/gst/gl/gstgldisplay.h

/*
 * GStreamer
 * Copyright (C) 2008 Julien Isorce <julien.isorce@gmail.com>
 * Copyright (C) 2008 Filippo Argiolas <filippo.argiolas@gmail.com>
 *
 * 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., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#ifndef __GST_GL_H__
#define __GST_GL_H__

#include <GL/glew.h>
#include <gstfreeglut.h>

#include <gst/gst.h>
#include <gst/video/video.h>

#include "gstglshader.h"

#define GST_TYPE_GL_DISPLAY			\
  (gst_gl_display_get_type())
#define GST_GL_DISPLAY(obj)						\
  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_GL_DISPLAY,GstGLDisplay))
#define GST_GL_DISPLAY_CLASS(klass)					\
  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_GL_DISPLAY,GstGLDisplayClass))
#define GST_IS_GL_DISPLAY(obj)					\
  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_GL_DISPLAY))
#define GST_IS_GL_DISPLAY_CLASS(klass)				\
  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_GL_DISPLAY))

typedef struct _GstGLDisplay GstGLDisplay;
typedef struct _GstGLDisplayClass GstGLDisplayClass;

//Color space conversion method
typedef enum {
  GST_GL_DISPLAY_CONVERSION_GLSL,   //ARB_fragment_shade
  GST_GL_DISPLAY_CONVERSION_MATRIX, //ARB_imaging
  GST_GL_DISPLAY_CONVERSION_MESA,   //MESA_ycbcr_texture
} GstGLDisplayConversion;


//Projection type
typedef enum {
  GST_GL_DISPLAY_PROJECTION_ORTHO2D,
  GST_GL_DISPLAY_PROJECTION_PERSPECIVE
} GstGLDisplayProjection;


//Message type
typedef enum {
  GST_GL_DISPLAY_ACTION_CREATE_CONTEXT,
  GST_GL_DISPLAY_ACTION_DESTROY_CONTEXT,
  GST_GL_DISPLAY_ACTION_CHANGE_CONTEXT,
  GST_GL_DISPLAY_ACTION_VISIBLE_CONTEXT,
  GST_GL_DISPLAY_ACTION_RESIZE_CONTEXT,
  GST_GL_DISPLAY_ACTION_REDISPLAY_CONTEXT,
  GST_GL_DISPLAY_ACTION_GENERIC,
  GST_GL_DISPLAY_ACTION_GEN_TEXTURE,
  GST_GL_DISPLAY_ACTION_DEL_TEXTURE,
  GST_GL_DISPLAY_ACTION_INIT_UPLOAD,
  GST_GL_DISPLAY_ACTION_DO_UPLOAD,
  GST_GL_DISPLAY_ACTION_INIT_DOWNLOAD,
  GST_GL_DISPLAY_ACTION_DO_DOWNLOAD,
  GST_GL_DISPLAY_ACTION_GEN_FBO,
  GST_GL_DISPLAY_ACTION_USE_FBO,
  GST_GL_DISPLAY_ACTION_DEL_FBO,
  GST_GL_DISPLAY_ACTION_GEN_SHADER,
  GST_GL_DISPLAY_ACTION_DEL_SHADER

} GstGLDisplayAction;


//Message to communicate with the gl thread
typedef struct _GstGLDisplayMsg {
  GstGLDisplayAction action;
  gint glutWinId;
  GstGLDisplay* display;
} GstGLDisplayMsg;


//Texture pool elements
typedef struct _GstGLDisplayTex {
  GLuint texture;
} GstGLDisplayTex;


//Client callbacks
typedef void (* CRCB) ( GLuint, GLuint );
typedef gboolean (* CDCB) ( GLuint, GLuint, GLuint);

typedef void (* GstGLDisplayThreadFunc) (GstGLDisplay *display, gpointer data);

//opengl scene callback
typedef void (* GLCB) ( gint, gint, guint, gpointer stuff);

struct _GstGLDisplay {
  GObject object;

  //thread safe
  GMutex* mutex;

  //gl context
  gint glutWinId;
  gulong winId;
  GString* title;
  gint win_xpos;
  gint win_ypos;
  gboolean visible;
  gboolean isAlive;
  GData* texture_pool;

  //conditions
  GCond* cond_create_context;
  GCond* cond_destroy_context;
  GCond* cond_change_context;
  GCond* cond_generic;
  GCond* cond_gen_texture;
  GCond* cond_del_texture;
  GCond* cond_init_upload;
  GCond* cond_do_upload;
  GCond* cond_init_download;
  GCond* cond_do_download;
  GCond* cond_gen_fbo;
  GCond* cond_use_fbo;
  GCond* cond_del_fbo;
  GCond* cond_gen_shader;
  GCond* cond_del_shader;

  //generic gl code
  GstGLDisplayThreadFunc generic_callback;
  gpointer data;

  //action redisplay
  GLuint redisplay_texture;
  GLuint redisplay_texture_width;
  GLuint redisplay_texture_height;

  //action resize
  gint resize_width;
  gint resize_height;

  //action gen and del texture
  GLuint gen_texture;
  GLuint gen_texture_width;
  GLuint gen_texture_height;
  GLuint del_texture;
  GLuint del_texture_width;
  GLuint del_texture_height;

  //client callbacks
  CRCB clientReshapeCallback;
  CDCB clientDrawCallback;

  //upload
  GLuint upload_fbo;
  GLuint upload_depth_buffer;
  GLuint upload_outtex;
  GLuint upload_intex;
  GLuint upload_intex_u;
  GLuint upload_intex_v;
  GLuint upload_width;
  GLuint upload_height;
  GstVideoFormat upload_video_format;
  GstGLDisplayConversion colorspace_conversion;
  gint upload_data_width;
  gint upload_data_height;
  gpointer upload_data;

  //filter gen fbo
  GLuint gen_fbo_width;
  GLuint gen_fbo_height;
  GLuint generated_fbo;
  GLuint generated_depth_buffer;

  //filter use fbo
  GLuint use_fbo;
  GLuint use_depth_buffer;
  GLuint use_fbo_texture;
  GLuint use_fbo_width;
  GLuint use_fbo_height;
  GLCB use_fbo_scene_cb;
  gdouble use_fbo_proj_param1;
  gdouble use_fbo_proj_param2;
  gdouble use_fbo_proj_param3;
  gdouble use_fbo_proj_param4;
  GstGLDisplayProjection use_fbo_projection;
  gpointer* use_fbo_stuff;
  GLuint input_texture_width;
  GLuint input_texture_height;
  GLuint input_texture;

  //filter del fbo
  GLuint del_fbo;
  GLuint del_depth_buffer;

  //download
  GLuint download_fbo;
  GLuint download_depth_buffer;
  GLuint download_texture;
  GLuint download_texture_u;
  GLuint download_texture_v;
  gint download_width;
  gint download_height;
  GstVideoFormat download_video_format;
  gpointer download_data;
  GLenum multipleRT[3];
  GLuint ouput_texture;
  GLuint ouput_texture_width;
  GLuint ouput_texture_height;

  //action gen and del shader
  const gchar* gen_text_shader;
  GstGLShader* gen_shader;
  GstGLShader* del_shader;

  //fragement shader upload
  gchar* text_shader_upload_YUY2_UYVY;
  GstGLShader* shader_upload_YUY2;
  GstGLShader* shader_upload_UYVY;

  gchar* text_shader_upload_I420_YV12;
  GstGLShader* shader_upload_I420_YV12;

  gchar* text_shader_upload_AYUV;
  GstGLShader* shader_upload_AYUV;

  //fragement shader download
  gchar* text_shader_download_YUY2_UYVY;
  GstGLShader* shader_download_YUY2;
  GstGLShader* shader_download_UYVY;

  gchar* text_shader_download_I420_YV12;
  GstGLShader* shader_download_I420_YV12;

  gchar* text_shader_download_AYUV;
  GstGLShader* shader_download_AYUV;
};


struct _GstGLDisplayClass {
  GObjectClass object_class;
};

GType gst_gl_display_get_type (void);


//------------------------------------------------------------
//-------------------- Public declarations ------------------
//------------------------------------------------------------
GstGLDisplay* gst_gl_display_new (void);

void gst_gl_display_create_context (GstGLDisplay* display,
                                    GLint x, GLint y,
                                    GLint width, GLint height,
                                    gulong winId,
                                    gboolean visible);
void gst_gl_display_set_visible_context (GstGLDisplay* display, gboolean visible);
void gst_gl_display_resize_context (GstGLDisplay* display, gint width, gint height);
gboolean gst_gl_display_redisplay (GstGLDisplay* display, GLuint texture, gint width, gint height);

void gst_gl_display_thread_add (GstGLDisplay *display,
				GstGLDisplayThreadFunc func, gpointer data);

void gst_gl_display_gen_texture (GstGLDisplay* display, GLuint* pTexture, GLint width, GLint height);
void gst_gl_display_del_texture (GstGLDisplay* display, GLuint texture, GLint width, GLint height);

void gst_gl_display_init_upload (GstGLDisplay* display, GstVideoFormat video_format,
                                 guint gl_width, guint gl_height,
                                 gint video_width, gint video_height);
gboolean gst_gl_display_do_upload (GstGLDisplay* display, GLuint texture,
                                   gint data_width, gint data_height,
                                   gpointer data);
void gst_gl_display_init_download (GstGLDisplay* display, GstVideoFormat video_format,
                                   gint width, gint height);
gboolean gst_gl_display_do_download (GstGLDisplay* display, GLuint texture,
                                     gint width, gint height,
                                     gpointer data);

void gst_gl_display_gen_fbo (GstGLDisplay* display, gint width, gint height,
                             GLuint* fbo, GLuint* depthbuffer);
gboolean gst_gl_display_use_fbo (GstGLDisplay* display, gint texture_fbo_width, gint texture_fbo_height,
                                 GLuint fbo, GLuint depth_buffer, GLuint texture_fbo, GLCB cb,
                                 gint input_texture_width, gint input_texture_height, GLuint input_texture,
                                 gdouble proj_param1, gdouble proj_param2,
                                 gdouble proj_param3, gdouble proj_param4,
                                 GstGLDisplayProjection projection, gpointer* stuff);
void gst_gl_display_del_fbo (GstGLDisplay* display, GLuint fbo,
                             GLuint depth_buffer);

void gst_gl_display_gen_shader (GstGLDisplay* display, const gchar* textShader, GstGLShader** shader);
void gst_gl_display_del_shader (GstGLDisplay* display, GstGLShader* shader);

void gst_gl_display_set_window_id (GstGLDisplay* display, gulong winId);
void gst_gl_display_set_client_reshape_callback (GstGLDisplay* display, CRCB cb);
void gst_gl_display_set_client_draw_callback (GstGLDisplay* display, CDCB cb);

#endif