sdl camera

Drawing circles is a very important requirement in the operation of computer graphics. The ordinary circle algorithm requires a large number of floating-point numbers to participate in the operation, and it is well known that the operation speed of floating-point numbers is much lower than shaping number. And the final screen of the pixels mapped to the coordinates are shaping, it is not possible to be a continuous line, so the floating-point arithmetic is actually a waste. The Bresenham algorit

When qemu/KVM is started in full-screen mode, the "cocould not open SDL display" error is reported, and then the KVM Virtual Machine exits. The reason is that the resolution of the KVM virtual machine is relatively high. High resolution refers to: (> = 1280x1024x16) The solution is to add the following parameters when starting KVM: Qemu/lkvm startup options: '-VGAType' ' STD' Standard VGA Card with bochs VBE extensions. if your g

Digital oscilloscope GUI base on SDL. 1. soure code: /* Bring up a window and play with it */ 2. Run on x86: 3. How to Use SDL APIs: 1). sdl_init (sdl_init_video ). Initialize the video devices such as framebuffer, direactfb, X11 or OpenGL etc. 2). Set the video device. Sdl_surface * screen, * window; Screen = sdl_setvideomode (W, H, 32, sdl_swsurface ); 3). Draw some graphic data on the backbuffe

/* Compile command: Arm-linux-gcc-o show2642 264showyuv2.c-i/usr/local/ffmpeg_arm/include/-l/usr/local/ffmpeg_arm/lib/- lswresample-lavformat-lavutil-lavcodec-lswscale-lx264 libsdl.a*/#include "stdio.h" #include "stdlib.h" #include "Lib Avformat/avformat.h "#include" libavdevice/avdevice.h "#include" libswresample/swresample.h "#include" libavutil/ Opt.h "#include" libavutil/channel_layout.h "#include" libavutil/parseutils.h "#include" libavutil/samplefmt.h "# Include "Libavutil/fifo.h" #include

I always wanted to write something like a player, but I lacked the knowledge of decoding audio files, so I was too lazy to learn it. After all, I was eager to write a decent software, and it took too much time to write a decoder by myself, in addition, it cannot be ensured that most of the cases can be handled, and there will inevitably be bugs. Fortunately, SDL once again provides the extended library sdl_mixer, which itself has too few supported for

Write by nine days Yan Ling (jtianling) -- blog.csdn.net/vagrxie Discuss newsgroups and documents Same paragraphProgramIn SDL with OpenGL, it is correct when glfw is used and Windows API is used to add OpenGL.As follows:Glbegin (gl_quads );Gltexcoord2f (0.0, 0.0); glvertex3f (-1.0,-1.0, 0.0 );Gltexcoord2f (1.0, 0.0); glvertex3f (1.0,-1.0, 0.0 );Gltexcoord2f (1.0, 1.0); glvertex3f (1.0, 1.0, 0.0 );Gltexcoord2f (0.0, 1.0); glvertex3f (-1.0, 1.0, 0.0

Lesson01.cpp Copy Code code as follows: /*this source code copyrighted by Lazy Foo ' Productions (2004-2013) And May is redistributed without written permission.*/ Include SDL functions and datatypes#include "sdl/sdl.h" int main (int argc, char* args[]){The imagessdl_surface* Hello = NULL;sdl_surface* screen = NULL; Start SDLSdl_init (sdl_init_everything); Set up screenScreen = Sdl_s

In the "SDL point, line, plane, and image loading" article, you are using SDL to display JPEG failures, and now you have a solution.Key functions:Sdl_rwops.h: extern DECLSPEC Sdl_rwops * sdlcall sdl_rwfromfile (const char *file, const char *mode); extern DECLSPEC void Sdlcall sdl_freerw (sdl_rwops *area); Sdl_image.h: extern DECLSPEC Sdl_surface * sdlcall img_loadjpg_rw (sdl_rwops *src); View the img_jpg

The question in the online by many netizens questions, you have given a variety of answers. I have also encountered this problem in the SDL multimedia library. After a good burst of exploration, we finally found the answer. Under normal circumstances, after compiling the SDL header files and libraries, simply point the header file to the correct location with the library file path. Then add the header files

These two days to do a video analysis software needs to use the SDL display images and text, the stage results are summarized:SDL itself does not have the functionality of the actual text, it needs to use its extension library Sdl_ttf:Http://www.libsdl.org/projects/SDL_ttf/docs/SDL_ttf.htmlGossip less, see Code (Engineering Environment: VS2005):#include "stdafx.h" #pragma comment (lib, "SDL.lib") #pragma comment (lib, "Sdl2_image.lib") #pragma comment

Environment: OS: Windows IDE: V. S. 2008 FFmpeg: http://www.bairuitech.com/html/ruanjianxiazai/20080613/98.html SDL:SDL-devel-1.2.15-VC.zip (Visual C ++) http://www.libsdl.org/download-1.2.php Flowchart: Source code file: // Mytestall. cpp: defines the entry point of the console application. // # Include "stdafx. H "extern" C "{# include" libavformat/avformat. H "# include" libavcodec/avcodec. H "# include" libswscale/swscale. H "# include" SDL. H

1. Set the audio parameters and the corresponding callback function. When the sound device requires data, SDL automatically calls this callback function to fill the struct. typedef struct SDL_AudioSpec {int freq;/** 2. Enable the sound Device SDL_OpenAudio(wanted_spec, spec) 3. Start Playing SDL_PauseAudio(0); 4. decode the audio stream in the callback function and copy the decoded buffer to the stream. Void audio_callback (void * userdata, uint8

Games are primarily interactive games. What is the difference between games without interaction and movies... So we have to deal with many related events, press or open the keyboard, move the mouse, and click .... Events are used to drive the game. SDL provides convenient functions to process events in the program. Events are defined as the combined sdl_event for multiple events, the following function retrieves the first event in the event queue: Int

Project Address:Https://github.com/jthmath/StringPlayerFrost String VideoThis is one of my open source projects. The goal is to become a sound and video player. But now only the function of playing audio is realized.The development environment is Windows 8.1 64-bit,vs2013 with Update4.The Open Source Library used: ffmpeg,sdl.Right-click on the window, a menu will pop up, select "Open File", then select an audio file to play.At present the function is also very primitive, has not realized the pau

In the previous chapter I briefly introduced our first SDL applet to implement a small palette function, focusing on how to draw your own patterns on sdl_surface, In this chapter I focus on the sdl_surface of the text on the display of the analysis. Let our screen also have its own text tag ... Of course.. You can also make your own notepad .... Of course.. Want to write, one of the necessary is to have a font, you can download nfs-share.tar.gz the

Use the FFMPEG library for video encoding and decoding, and Use SDL to play videos. For more information about the code, see the code of dranger. extern "C" {#include "libavformat/avformat.h" #include "libswscale/swscale.h" }#include

Download here: http://www.ferzkopp.net/joomla/content/view/19/14/ The name is SDL_gfx, and here is its API document http://www.ferzkopp.net/Software/SDL_gfx-2.0/Docs/html/index.html Of course, if you only need scaling, you can also write a simple function to scale the image without other features. Here is Complete scaling code is provided here: Uint32 ReadPixel(SDL_Surface *surface, int x, int y){ int bpp = surface->format->BytesPerPixel; /* Here p is the address to the pixel we want to

Keywords:Camif parameter of the android camera CMM ModulePlatform information:Kernel:LinuxSystem:Android Platform:S5pv310 (Samsung exynos 4210) Author: xubin341719 (You are welcome to reprint it. Please note the author) Android camera (1): CMM introduction to the camera Module Android camera (II):

First, the camera working principleIn the previous article we talked about the composition of the camera module, working principle, as a kind of understanding. Let's analyze how the camera works from the register angle. How to read the camera spec (use key parameters for driver tuning, take GT2005 as an example).The sp

Luvcview Camera program to cortex A8 installation transplant 1.Overview 1.1. purpose of writing In order to facilitate everyone to understand Luvcview installation use, special writing this document to provide you with reference learning. 2. Summary of Experience 2.1. SDL Multimedia Library 2.1.1. Luvcview run relies on the SDL multimedia library, down