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* This file is part of bino, a 3D video player.
* Copyright (C) 2010 Martin Lambers <>
* 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 3 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
* 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, see <>.
#include <vector>
#include <string>
#include <GL/glew.h>
#include "video_output.h"
/* See video_output.h for API documentation */
class video_output_opengl : public video_output
// Video properties (fixed during playback)
enum decoder::video_frame_format _src_format;
bool _src_is_mono;
int _src_width;
int _src_height;
float _src_aspect_ratio;
// Screen properties (fixed during playback)
int _screen_width;
int _screen_height;
float _screen_pixel_aspect_ratio;
// Video output mode (fixed during playback)
enum video_output::mode _mode;
// Video output properties (variable)
video_output_state _state;
int _win_width;
int _win_height;
/* We have two texture sets for input: one holding the current video frame
* for output, and one for preparing the next video frame. Each texture set
* has textures for the left and right view. */
int _active_tex_set; // 0 or 1
bool _have_valid_data[2]; // do we have valid data in the given texture set?
// Step 1: input of video data
GLuint _pbo; // pixel-buffer object for texture uploading
GLuint _yuv420p_y_tex[2][2];// for yuv420p format: y component
GLuint _yuv420p_u_tex[2][2];// for yuv420p format: u component
GLuint _yuv420p_v_tex[2][2];// for yuv420p format: v component
GLuint _bgra32_tex[2][2]; // for bgra32 format
// Step 2: color-correction
GLuint _color_prg; // color space transformation, color adjustment
GLuint _color_fbo; // framebuffer object to render into the sRGB texture
GLuint _srgb_tex[2]; // output: sRGB texture
// Step 3: rendering
GLuint _render_prg; // reads sRGB texture, renders according to _mode
GLuint _mask_tex; // for the masking modes even-odd-{rows,columns}, checkerboard
// Is the GL stuff initialized?
bool _initialized;
// XXX: Hack: work around broken SRGB texture implementations
bool _srgb_textures_are_broken;
// OpenGL Viewport for drawing the video frame
GLint _viewport[4];
/* In a sub-class that provides an OpenGL context, call the following
* initialization functions in the order in which they appear here.
* You must make sure that the OpenGL context provides GL 2.1 + FBOs. */
void set_mode(enum video_output::mode mode);
void set_source_info(int width, int height, float aspect_ratio, enum decoder::video_frame_format format, bool mono);
void set_screen_info(int width, int height, float pixel_aspect_ratio);
void compute_win_size(int width = -1, int height = -1);
void set_state(const video_output_state &_state);
void initialize();
// Swap the texture sets (one active, one for preparing the next video frame)
void swap_tex_set();
// Clear the video area
void clear();
// Display the current texture set. The first version of this function is used
// by Equalizer; simple windows will use the second version.
void display(bool toggle_swap_eyes, float x, float y, float w, float h, const int viewport[4]);
void display() { display(false, -1.0f, -1.0f, 2.0f, 2.0f, _viewport); }
// Call this when the GL window was resized:
void reshape(int w, int h);
// Access information
video_output_state &state()
return _state;
int screen_width() const
return _screen_width;
int screen_height() const
return _screen_height;
int win_width() const
return _win_width;
int win_height() const
return _win_height;
// Deinitialize.
void deinitialize();
// These functions must be implemented in a subclass and must
// return the position of the video area on the screen.
virtual int screen_pos_x() = 0;
virtual int screen_pos_y() = 0;
video_output_opengl(bool receive_notifications = true) throw ();
virtual ~video_output_opengl();
virtual bool supports_stereo() = 0;
virtual void open(
enum decoder::video_frame_format format, bool mono,
int src_width, int src_height, float src_aspect_ratio,
int mode, const video_output_state &state, unsigned int flags,
int win_width, int win_height) = 0;
virtual enum mode mode() const
return _mode;
virtual const video_output_state &state() const
return _state;
virtual void *prepare_start(int view, int plane);
virtual void prepare_finish(int view, int plane);
virtual void activate() = 0;
virtual void process_events() = 0;
virtual void close() = 0;
virtual void receive_notification(const notification &note) = 0;
std::vector<std::string> glew_versions();
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