pano_gl.cpp File Reference

#include <cassert>
#include <chrono>
#include <condition_variable>
#include <mutex>
#include <queue>
#include "debug.h"
#include "host.h"
#include "keyboard_control.h"
#include "lib_common.h"
#include "messaging.h"
#include "module.h"
#include "video.h"
#include "video_display.h"
#include "video_display/splashscreen.h"
#include "opengl_utils.hpp"
#include "opengl_panorama.hpp"
#include "sdl_window.hpp"
#include "utils/profile_timer.hpp"

Include dependency graph for pano_gl.cpp:

Go to the source code of this file.

Classes
struct	state_vr

Macros
#define	MAX_BUFFER_SIZE   1
#define	MOD_NAME   "[pano gl] "

Functions
static void	display_panogl_done (void *state)
static bool	display_panogl_get_property (void *state, int property, void *val, size_t *len)
static struct video_frame *	display_panogl_getf (void *state)
static void *	display_panogl_init (struct module *parent, const char *fmt, unsigned int flags)
static void	display_panogl_probe (struct device_info **available_cards, int *count, void(**deleter)(void *))
static bool	display_panogl_putf (void *state, struct video_frame *frame, long long nonblock)
static bool	display_panogl_reconfigure (void *state, struct video_desc desc)
static void	display_panogl_run (void *state)
static void	draw (state_vr *s)
static void	handle_keyboard_event (state_vr *s, SDL_Event *event)
static void	handle_user_event (state_vr *s, SDL_Event *event)
static void	handle_window_event (state_vr *s, SDL_Event *event)
static void	redraw (state_vr *s, bool video_framerate_over_threshold=false, bool triggered_by_frame=false)
static Uint32	redraw_callback (Uint32 interval, void *param)
	REGISTER_MODULE (pano_gl, &display_panogl_info, LIBRARY_CLASS_VIDEO_DISPLAY, VIDEO_DISPLAY_ABI_VERSION)

Variables
static const struct video_display_info	display_panogl_info

Detailed Description

Author

Martin Piatka piatk.nosp@m.a@ce.nosp@m.snet..nosp@m.cz

Definition in file pano_gl.cpp.

Macro Definition Documentation

MAX_BUFFER_SIZE

#define MAX_BUFFER_SIZE   1

Definition at line 64 of file pano_gl.cpp.

Referenced by display_panogl_putf().

MOD_NAME

#define MOD_NAME   "[pano gl] "

Definition at line 65 of file pano_gl.cpp.

Function Documentation

display_panogl_done()

static void display_panogl_done ( void * state )

static

Definition at line 258 of file pano_gl.cpp.

                                             {
        state_vr *s = static_cast<state_vr *>(state);
 
        delete s;
}

References state.

display_panogl_get_property()

static bool display_panogl_get_property ( void * state, int property, void * val, size_t * len )

static

Definition at line 317 of file pano_gl.cpp.

                                                                                           {
        struct state_vr *s = static_cast<state_vr *>(state);
        enum interlacing_t supported_il_modes[] = {PROGRESSIVE};
        int rgb_shift[] = {0, 8, 16};
 
        switch (property) {
                case DISPLAY_PROPERTY_CODECS: {
                        auto codecs = s->scene.get_codecs();
                        size_t codecs_size = codecs.size() * sizeof(codec_t);
                        if(codecs_size <= *len) {
                                memcpy(val, codecs.data(), codecs_size);
                        } else {
                                return false;
                        }
 
                        *len = codecs_size;
                        break;
                }
                case DISPLAY_PROPERTY_RGB_SHIFT:
                        if(sizeof(rgb_shift) > *len) {
                                return false;
                        }
                        memcpy(val, rgb_shift, sizeof(rgb_shift));
                        *len = sizeof(rgb_shift);
                        break;
                case DISPLAY_PROPERTY_BUF_PITCH:
                        *(int *) val = PITCH_DEFAULT;
                        *len = sizeof(int);
                        break;
                case DISPLAY_PROPERTY_SUPPORTED_IL_MODES:
                        if(sizeof(supported_il_modes) <= *len) {
                                memcpy(val, supported_il_modes, sizeof(supported_il_modes));
                        } else {
                                return false;
                        }
                        *len = sizeof(supported_il_modes);
                        break;
                default:
                        return false;
        }
        return true;
}

References codecs, DISPLAY_PROPERTY_BUF_PITCH, DISPLAY_PROPERTY_CODECS, DISPLAY_PROPERTY_RGB_SHIFT, DISPLAY_PROPERTY_SUPPORTED_IL_MODES, PanoramaScene::get_codecs(), len, PITCH_DEFAULT, PROGRESSIVE, property, state_vr::scene, state, and val.

Here is the call graph for this function:

display_panogl_getf()

static struct video_frame * display_panogl_getf ( void * state )

static

Definition at line 264 of file pano_gl.cpp.

                                                             {
        struct state_vr *s = static_cast<state_vr *>(state);
 
        std::lock_guard<std::mutex> lock(s->lock);
 
        while (s->free_frame_queue.size() > 0) {
                struct video_frame *buffer = s->free_frame_queue.front();
                s->free_frame_queue.pop();
                if (video_desc_eq(video_desc_from_frame(buffer), s->current_desc)) {
                        return buffer;
                } else {
                        vf_free(buffer);
                }
        }
 
        return vf_alloc_desc_data(s->current_desc);
}

References state_vr::current_desc, state_vr::free_frame_queue, state_vr::lock, state, vf_alloc_desc_data(), vf_free(), video_desc_eq(), and video_desc_from_frame().

Here is the call graph for this function:

display_panogl_init()

static void * display_panogl_init ( struct module * parent, const char * fmt, unsigned int flags )

static

Definition at line 93 of file pano_gl.cpp.

                                                                                              {
        UNUSED(parent);
        UNUSED(fmt);
        UNUSED(flags);
        state_vr *s = new state_vr();
        s->sdl_frame_event = SDL_RegisterEvents(1);
        s->sdl_redraw_event = SDL_RegisterEvents(1);
 
        return s;
}

References flags, fmt, parent, state_vr::sdl_frame_event, state_vr::sdl_redraw_event, and UNUSED.

display_panogl_probe()

static void display_panogl_probe ( struct device_info ** available_cards, int * count, void(** deleter )(void *) )

static

Definition at line 360 of file pano_gl.cpp.

                                                                                                             {
        UNUSED(deleter);
        *count = 1;
        *available_cards = (struct device_info *) calloc(1, sizeof(struct device_info));
        strcpy((*available_cards)[0].dev, "");
        strcpy((*available_cards)[0].name, "Panorama Gl SW display");
        (*available_cards)[0].repeatable = true;
}

References count, deleter, device_info::dev, name, and UNUSED.

display_panogl_putf()

static bool display_panogl_putf ( void * state, struct video_frame * frame, long long nonblock )

static

Definition at line 282 of file pano_gl.cpp.

                                                                                            {
        PROFILE_FUNC;
        struct state_vr *s = static_cast<state_vr *>(state);
 
        if (nonblock == PUTF_DISCARD) {
                vf_free(frame);
                return true;
        }
 
        std::unique_lock<std::mutex> lk(s->lock);
        if (s->buffered_frames_count >= MAX_BUFFER_SIZE && nonblock != PUTF_BLOCKING
                        && frame != NULL) {
                vf_free(frame);
                printf("1 frame(s) dropped!\n");
                return false;
        }
        s->frame_consumed_cv.wait(lk, [s]{return s->buffered_frames_count < MAX_BUFFER_SIZE;});
        s->buffered_frames_count += 1;
        lk.unlock();
        SDL_Event event;
        event.type = s->sdl_frame_event;
        event.user.data1 = frame;
        PROFILE_DETAIL("push frame event");
        SDL_PushEvent(&event);
 
        return true;
}

References state_vr::buffered_frames_count, frame, state_vr::frame_consumed_cv, state_vr::lock, MAX_BUFFER_SIZE, nonblock, PROFILE_DETAIL, PROFILE_FUNC, PUTF_BLOCKING, PUTF_DISCARD, state_vr::sdl_frame_event, state, and vf_free().

Here is the call graph for this function:

display_panogl_reconfigure()

static bool display_panogl_reconfigure ( void * state, struct video_desc desc )

static

Definition at line 310 of file pano_gl.cpp.

                                                                            {
        state_vr *s = static_cast<state_vr *>(state);
 
        s->current_desc = desc;
        return true;
}

References state_vr::current_desc, desc, and state.

display_panogl_run()

static void display_panogl_run ( void * state )

static

Definition at line 216 of file pano_gl.cpp.

                                            {
        state_vr *s = static_cast<state_vr *>(state);
 
        draw(s);
 
        s->running = true;
        while(s->running){
                SDL_Event event;
                if (!SDL_WaitEvent(&event)) {
                        continue;
                }
 
                switch(event.type){
                        case SDL_MOUSEMOTION:
                                if(event.motion.state & SDL_BUTTON_LMASK){
                                        s->scene.rotate(event.motion.xrel / 8.f,
                                                        event.motion.yrel / 8.f);
 
                                        redraw(s);
                                }
                                break;
                        case SDL_MOUSEWHEEL:
                                s->scene.fov -= event.wheel.y;
                                redraw(s);
                                break;
                        case SDL_WINDOWEVENT:
                                handle_window_event(s, &event);
                                break;
                        case SDL_KEYDOWN:
                                handle_keyboard_event(s, &event);
                                break;
                        case SDL_QUIT:
                                exit_uv(0);
                                break;
                        default: 
                                if(event.type >= SDL_USEREVENT)
                                        handle_user_event(s, &event);
                                break;
                }
        }
}

References draw(), exit_uv(), PanoramaScene::fov, handle_keyboard_event(), handle_user_event(), handle_window_event(), redraw(), PanoramaScene::rotate(), state_vr::running, state_vr::scene, and state.

Here is the call graph for this function:

draw()

static void draw ( state_vr * s )

static

Definition at line 104 of file pano_gl.cpp.

                             {
        PROFILE_FUNC;
        auto now = std::chrono::steady_clock::now();
        s->last_frame = now;
 
        glClear(GL_COLOR_BUFFER_BIT);
        s->scene.render(s->window.width, s->window.height);
 
        SDL_GL_SwapWindow(s->window.sdl_window);
}

References Sdl_window::height, state_vr::last_frame, PROFILE_FUNC, PanoramaScene::render(), state_vr::scene, Sdl_window::sdl_window, Sdl_window::width, and state_vr::window.

Referenced by display_panogl_run(), handle_user_event(), and redraw().

Here is the call graph for this function:

handle_keyboard_event()

static void handle_keyboard_event ( state_vr * s, SDL_Event * event )

static

Definition at line 166 of file pano_gl.cpp.

                                                                {
        if(event->key.type == SDL_KEYDOWN){
                switch(event->key.keysym.sym){
                        case SDLK_f:
                                s->fs = !s->fs;
                                SDL_SetWindowFullscreen(s->window.sdl_window, s->fs ? SDL_WINDOW_FULLSCREEN_DESKTOP : 0);
                                redraw(s);
                                break;
                        case SDLK_q:
                                exit_uv(0);
                                break;
                        default:
                                break;
                }
        }
}

References exit_uv(), state_vr::fs, redraw(), Sdl_window::sdl_window, and state_vr::window.

Referenced by display_panogl_run().

Here is the call graph for this function:

handle_user_event()

static void handle_user_event ( state_vr * s, SDL_Event * event )

static

Definition at line 183 of file pano_gl.cpp.

                                                            {
        if(event->type == s->sdl_frame_event){
                std::unique_lock<std::mutex> lk(s->lock);
                s->buffered_frames_count -= 1;
                lk.unlock();
                s->frame_consumed_cv.notify_one();
 
                video_frame *frame = static_cast<video_frame *>(event->user.data1);
 
                if(frame){
                        s->scene.put_frame(frame);
 
                        lk.lock();
                        vf_recycle(frame);
                        s->free_frame_queue.push(frame);
                        lk.unlock();
                } else {
                        //poison
                        s->running = false;
                        return;
                }
                redraw(s, frame->fps >= s->threshold_fps, true);
        } else if(event->type == s->sdl_redraw_event){
                if(s->redraw_needed){
                        draw(s);
                        s->redraw_needed = false;
                } else {
                        SDL_RemoveTimer(s->redraw_timer);
                        s->redraw_timer = 0;
                }
        }
}

References state_vr::buffered_frames_count, draw(), video_frame::fps, frame, state_vr::frame_consumed_cv, state_vr::free_frame_queue, state_vr::lock, PanoramaScene::put_frame(), redraw(), state_vr::redraw_needed, state_vr::redraw_timer, state_vr::running, state_vr::scene, state_vr::sdl_frame_event, state_vr::sdl_redraw_event, state_vr::threshold_fps, and vf_recycle().

Referenced by display_panogl_run().

Here is the call graph for this function:

handle_window_event()

static void handle_window_event ( state_vr * s, SDL_Event * event )

static

Definition at line 157 of file pano_gl.cpp.

                                                              {
        if(event->window.event == SDL_WINDOWEVENT_RESIZED){
                glViewport(0, 0, event->window.data1, event->window.data2);
                s->window.width = event->window.data1;
                s->window.height = event->window.data2;
                redraw(s);
        }
}

References Sdl_window::height, redraw(), Sdl_window::width, and state_vr::window.

Referenced by display_panogl_run().

Here is the call graph for this function:

redraw()

static void redraw ( state_vr * s, bool video_framerate_over_threshold = false, bool triggered_by_frame = false )

static

Definition at line 124 of file pano_gl.cpp.

{
        if(video_framerate_over_threshold && triggered_by_frame){
                /* If video framerate is over the threshold we draw the
                 * incoming frames immediately. Since this draw already
                 * contains changes caused by interaction (e.g. moving the
                 * camera) we cancel the redraw timer
                 */
                if(s->redraw_timer){
                        SDL_RemoveTimer(s->redraw_timer);
                        s->redraw_timer = 0;
                        s->redraw_needed = false;
                }
                draw(s);
        } else {
                if(!s->redraw_timer){
                        /* Redrawing due to interaction is delayed, so that if
                         * a fresh video frame arrives very soon after the
                         * interaction it can be drawn together with the
                         * changes caused by interaction
                         */
                        s->redraw_timer = SDL_AddTimer(1000 / s->threshold_fps,
                                        redraw_callback, &s->sdl_redraw_event);
 
                        if(triggered_by_frame)
                                draw(s);
                }
                s->redraw_needed = !triggered_by_frame;
        }
}

References draw(), redraw_callback(), state_vr::redraw_needed, state_vr::redraw_timer, state_vr::sdl_redraw_event, and state_vr::threshold_fps.

Referenced by display_panogl_run(), handle_keyboard_event(), handle_user_event(), and handle_window_event().

Here is the call graph for this function:

redraw_callback()

static Uint32 redraw_callback ( Uint32 interval, void * param )

static

Definition at line 115 of file pano_gl.cpp.

                                                           {
        int event_id = *static_cast<int *>(param);
        SDL_Event event;
        event.type = event_id;
        SDL_PushEvent(&event);
 
        return interval;
}

References param.

Referenced by redraw().

REGISTER_MODULE()

REGISTER_MODULE	(	pano_gl	,
		&	display_panogl_info,
		LIBRARY_CLASS_VIDEO_DISPLAY	,
		VIDEO_DISPLAY_ABI_VERSION	)

Variable Documentation

display_panogl_info

const struct video_display_info display_panogl_info

static

Initial value:

= {
        display_panogl_probe,
        display_panogl_init,
        display_panogl_run,
        display_panogl_done,
        display_panogl_getf,
        display_panogl_putf,
        display_panogl_reconfigure,
        display_panogl_get_property,
        NULL,
        NULL,
        MOD_NAME,
}

Definition at line 369 of file pano_gl.cpp.

                                                             {
        display_panogl_probe,
        display_panogl_init,
        display_panogl_run,
        display_panogl_done,
        display_panogl_getf,
        display_panogl_putf,
        display_panogl_reconfigure,
        display_panogl_get_property,
        NULL,
        NULL,
        MOD_NAME,
};