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Dingoo SDK
The Dingoo SDK is a software development kit for the Dingoo A320 video game console and other compatible devices, such as the Gemei X760+ and Dingoo A330. History Dingoo SDK was originally developed by Ben Brewer (aka flatmush) and first released publicly as a set of source files containing wrappers implementing basic libc functionality along with samples on how to use them. The project grew with many people making contributions to the SDK and to the Dingoo scene in general until March 10, 2010 when the project was moved to googlecode and an official source tree was begun. Libraries Projects Several projects have been developed using the SDK: Licensing Dingoo SDK is released under the GNU LGPL, a permissive free software licence, and is free software Free software or libre software is computer software distributed under terms that allow users to run the software for any purpose as well as to study, change, and distribute it and any adapted versions. Free softwar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
C (programming Language)
C (''pronounced like the letter c'') is a General-purpose language, general-purpose computer programming language. It was created in the 1970s by Dennis Ritchie, and remains very widely used and influential. By design, C's features cleanly reflect the capabilities of the targeted CPUs. It has found lasting use in operating systems, device drivers, protocol stacks, though decreasingly for application software. C is commonly used on computer architectures that range from the largest supercomputers to the smallest microcontrollers and embedded systems. A successor to the programming language B (programming language), B, C was originally developed at Bell Labs by Ritchie between 1972 and 1973 to construct utilities running on Unix. It was applied to re-implementing the kernel of the Unix operating system. During the 1980s, C gradually gained popularity. It has become one of the measuring programming language popularity, most widely used programming languages, with C compilers avail ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Libstdc++ {{R from other capitalisation ...
#REDIRECT C++ Standard Library The C standard library or libc is the standard library for the C programming language, as specified in the ISO C standard.ISO/IEC (2018). '' ISO/IEC 9899:2018(E): Programming Languages - C §7'' Starting from the original ANSI C standard, it wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fixed-point Arithmetic
In computing, fixed-point is a method of representing fractional (non-integer) numbers by storing a fixed number of digits of their fractional part. Dollar amounts, for example, are often stored with exactly two fractional digits, representing the cents (1/100 of dollar). More generally, the term may refer to representing fractional values as integer multiples of some fixed small unit, e.g. a fractional amount of hours as an integer multiple of ten-minute intervals. Fixed-point number representation is often contrasted to the more complicated and computationally demanding floating-point representation. In the fixed-point representation, the fraction is often expressed in the same number base as the integer part, but using negative powers of the base ''b''. The most common variants are decimal (base 10) and binary (base 2). The latter is commonly known also as binary scaling. Thus, if ''n'' fraction digits are stored, the value will always be an integer multiple of ''b' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Libfixmath
libfixmath is a platform-independent fixed-point math library aimed at developers wanting to perform fast non-integer math on platforms lacking a (or with a low performance) FPU. It offers developers a similar interface to the standard math.h functions for use on Q16.16 fixed-point numbers. libfixmath has no external dependencies other than stdint.h and a compiler which supports 64-bit integer arithmetic (such as GCC). Conditional compilation options exist to remove the requirement for a 64-bit capable compiler as many compilers for microcontrollers and DSPs do not support 64-bit arithmetic. History libfixmath was developed by Ben Brewer and first released publicly as part of the Dingoo SDK. It has since been used to implement a software 3D graphics library called FGL. Q16.16 functions Other functions Performance For the most intensive function (atan2) benchmark results show the following results: Note: These results were calculated using fixtest with caching optim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Virtual Keyboard
A virtual keyboard is a software component that allows the Input device, input of characters without the need for physical keys. The interaction with the virtual Computer keyboard, keyboard happens mostly via a touchscreen interface, but can also take place in a different form in Virtual reality, virtual or augmented reality. Types On a desktop computer, a virtual keyboard might provide an alternative input mechanism for users with disability, disabilities who cannot use a conventional keyboard, or for bi- or multilingualism, multi-lingual users who switch frequently between different character sets or alphabets, which may be confusing over time. Although hardware keyboards are available with dual keyboard layouts (e.g. Cyrillic/Latin letters in various national layouts), the on-screen keyboard provides a handy substitute while working at different stations or on laptops, which seldom come with dual layouts. Virtual keyboards can be categorized by the following aspects: * Virtu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MOD (file Format)
MOD is a computer file format used primarily to represent music, and was the first module file format. MOD files use the “.MOD” file extension, except on the Amiga which doesn't rely on filename extensions; instead, it reads a file's header to determine filetype. A MOD file contains a set of ''instruments'' in the form of samples, a number of ''patterns'' indicating how and when the samples are to be played, and a list of what patterns to play in what order. History The first version of the format was created by Karsten Obarski for use in the Ultimate Soundtracker, tracker software released for the Amiga computer in 1987. The format has since been supported by hundreds of playback programs and dozens of other trackers. The original version of the MOD format featured four channels of simultaneous audio playback, corresponding to the capabilities of the original Amiga chipset, and up to 15 instruments. Later variations of the format have extended this to up to 32 chann ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dingoo A320
The Dingoo is a handheld gaming console that supports music and video playback and open game development. The system features an on-board radio and recording program. It is available to consumers in three colors: white, black, and pink. It was released in February 2009 and has since sold over 1 million units. Other versions of the console include Dingoo A330 and Dingoo A380. Dingoo focuses on games and media products, and is located in the Futian District, Shenzhen. Hardware Specifications A320 * Internal Storage 1/2/4GB flash * Additional Storage MiniSD/SDHC (MicroSD/SDHC with adapter) * Input D-Pad, 2 shoulder, 4 face, Start & Select buttons, Microphone. * Outputs Stereo Speakers, Headphone Jack & TV-out w/ included cable * I/O Mini-USB connector 2.0 * Video Playback RM, MP4, 3GP, AVI, ASF, MOV, FLV, MPEG * Audio Playback MP3, WMA, APE, FLAC, RA * Radio Digital FM Tuner * Recording Supports digital recording of voice (MP3 and WMA formats) and FM radio at 8 k ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Libmikmod
A music tracker (sometimes referred to as just tracker for short) is a type of music sequencer software for creating music. The music is represented as discrete musical notes positioned in several channels at discrete chronological positions on a vertical timeline. A music tracker's user interface is usually number based. Notes, parameter changes, effects and other commands are entered with the keyboard into a grid of fixed time slots as codes consisting of letters, numbers and hexadecimal digits. Separate patterns have independent timelines; a complete song consists of a master list of repeated patterns. Later trackers departed from solely using module files, adding other options both to the sound synthesis (hosting generic synthesizers and effects or MIDI output) and to the sequencing (MIDI input and recording), effectively becoming general purpose sequencers with a different user interface. In the 2010s, tracker music is still featured in demoscene products for old hardware p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Libmad
MPEG Audio Decoder (MAD) is a GPL library for decoding files that have been encoded with an MPEG audio codec. It was written by Robert Leslie and produced by Underbit Technologies. It was developed as a new implementation, on the ISO/IEC standards. It consists of libmad, a software library, and madplay, a command-line program for MP3 playback. libmad is notable for using only fixed-point arithmetic while madplay is notable for its ReplayGain ReplayGain is a proposed technical standard published by David Robinson in 2001 to measure and normalize the perceived loudness of audio in computer audio formats such as MP3 and Ogg Vorbis. It allows media players to normalize loudness for indi ... support. References External linksMAD's home page [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tremor (software)
Tremor by the Xiph.Org Foundation is a fixed-point arithmetic, fixed-point version of the Vorbis decoder for those platforms without floating point operations. It is a software library that decodes the Vorbis audio format. It is free software released under the New BSD license. Tremor uses fixed-point and movable-point arithmetic numeric representations in its implementation so that it can be used by small embedded devices, which typically do not have Floating_point_unit, floating-point processors. Thus, Tremor enables small embedded devices to play audio files stored in the Vorbis format. Tremor was originally developed by Xiph.Org as a part of a contract for the Iomega HipZip, but was since opened up to encourage wider use of the Vorbis format. Almost all hardware devices that can play Vorbis, and many software implementations on embedded devices (such as mobile phones) use Tremor or some descendant. Xiph.Org has expressed interest in modifying Tremor into a floating-point versio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zlib
zlib ( or "zeta-lib", ) is a software library used for data compression. zlib was written by Jean-loup Gailly and Mark Adler and is an abstraction of the DEFLATE compression algorithm used in their gzip file compression program. zlib is also a crucial component of many software platforms, including Linux, macOS, and iOS. It has also been used in gaming consoles such as the PlayStation 4, PlayStation 3, Wii U, Wii, Xbox One and Xbox 360. The first public version of zlib, 0.9, was released on 1 May 1995 and was originally intended for use with the libpng image library. It is free software, distributed under the zlib License. Capabilities Encapsulation zlib compressed data are typically written with a gzip or a zlib wrapper. The wrapper encapsulates the raw DEFLATE data by adding a header and trailer. This provides stream identification and error detection that are not provided by the raw DEFLATE data. The gzip header, used in the ubiquitous gzip file format, is larger than ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Libpng
libpng is the official Portable Network Graphics (PNG) reference library (originally called pnglib). It is a platform-independent library that contains C functions for handling PNG images. It supports almost all of PNG's features, is extensible, and has been widely used and tested for over 23 years. libpng is dependent on zlib for data compression and decompression routines. libpng is released under the libpng license, a permissive free software licence, and is free software Free software or libre software is computer software distributed under terms that allow users to run the software for any purpose as well as to study, change, and distribute it and any adapted versions. Free software is a matter of liberty, no .... It is frequently used in both free and proprietary software, either directly or through the use of a higher level image library. the latest versions in the 1.6.x and 1.5.x branches were considered as release versions, while 1.4.x, 1.2.x, and 1.0.x we ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
