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Questions tagged [libjpeg-turbo]

libjpeg-turbo is a fork of libjpeg that uses SIMD instructions to accelerate baseline JPEG encoding and decoding.

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libjpeg-turbo is a derivative of libjpeg that uses SIMD instructions (MMX, SSE2, NEON) to accelerate baseline JPEG compression and decompression on x86, x86-64, and ARM systems. On such systems, libjpeg-turbo is generally 2-4x as fast as the unmodified version of libjpeg, all else being equal.

libjpeg-turbo was originally based on libjpeg/SIMD by Miyasaka Masaru, but the TigerVNC and VirtualGL projects made numerous enhancements to the codec in 2009, including improved support for Mac OS X, 64-bit support, support for 32-bit and big-endian pixel formats (RGBX, XBGR, etc.), accelerated Huffman encoding/decoding, and various bug fixes.

libjpeg-turbo generally achieves 80-120% of the performance of TurboJPEG/IPP. It is faster in some areas but slower in others.

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NDK libjpeg-turbo shared library build faild with armeabi

I use sorccu's Github code to build shared library by just editing the .mk file last line to "include $(BUILD_SHARED_LIBRARY)". https://github.com/openstf/android-libjpeg-turbo But it failed with: ....... [armeabi] Compile thumb :…
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How to compile libjpeg-turbo for Android on OS X?

I'm trying to build libjpeg-turbo for Android on OS X. Here is the script that I'm using: # Set these variables to suit your…
Buddy
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JPEG source-code and quantization mode change - C language

I'm assigned to do a project that consists in changing the quantization in the JPEG source-code, from the quantization tables to Lloyd-Max quantization. The problem is not knowing what to do (I know how to change the quantization), but where to find…
André Monteiro
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Libjpeg write text at some specific position

Is there a way to output a text at some (x,y) position having a certain "size", such as a numeral '1'? For example in gnuplot, we can use plot ... using x:y:size w labels center... Is there something similar which I can use with the libjpeg…
Sandipan Bhattacharyya
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How to save a JPEG file from RGB buffer in the easiest way (VS2008 C++)?

I've seen many guides and there always seem to be something missing. If someone can post here a complete "idiot's" guide it will be great! In any case, I will provide here what I've tried to do so far: I've tried to download libjpeg and got confused…
brkeyal
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Unable to install libjpeg-turbo8-dev on Ubuntu

I tried to install libjpeg-turbo8-dev like this. feng@HP:~$ sudo apt-get install libjpeg-turbo8-dev [sudo] password for feng: Reading package lists... Done Building dependency tree Reading state information... Done The following packages…
fengyl
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libjpeg-turbo for Android: how to organize runtime selection of NEON / non-NEON code?

I'm using a libjpeg-turbo port for Android. It's not much different from the base jpeg-turbo in terms of source code: http://git.linaro.org/gitweb?p=people/tomgall/libjpeg-turbo/libjpeg-turbo.git;a=shortlog;h=refs/heads/android There is a module…
Violet Giraffe
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How to replace libjpeg with libjpeg-turbo when using gstreamer sdk android?

The project https://github.com/iiordanov/bVNC using gstreamer sdk(http://docs.gstreamer.com/display/GstSDK/Installing+for+Android+development). the jpeg library used by it is jpeglib. I want to replace jpeglib with libjpeg-turbo to improve mjpeg…
linuxqc
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Shared library truncated when i run build script

I want to use libjpeg.so in my android project. I have precompiled shared library. Build script in my project: LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE := libjpeg LOCAL_SRC_FILES :=../lib1/libjpeg.so include…
ego
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realloc image buffer in turbojpeg cpp

I'm using turbojpeg for reading images. I'm doing something along these lines: m_data = tjAlloc(MAX_RAW_SIZE); c_jpeg_buffer = tjAlloc(MAX_RAW_SIZE); tjDecompressHeader2(jpegDecompressor, c_jpeg_buffer, _jpegSize, &tj_width, &tj_height,…
mousomer
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libjpeg-turbo java encode jpeg

Ive installed libjpeg-turbo on my mac and added the jar and libs to my eclipse project. Im trying to create jpeg byte[] from my bufferedimage: TJCompressor tj = new TJCompressor(); tj.compress(image, TJ.PF_BGR); The error I get is:…
user2076941
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libjpeg not exact pixel values even with quality of 100

I am writing a program to read some text files and write it to a JPEG file using libjpeg. When I set the quality to 100 (withjpeg_set_quality), there is actually no quality degradation in grayscale. However, when I move to RGB, even with a quality…
makhlaghi
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Why read_JPEG_file() fails to write image (libjpeg/jpeg-turbo) in C?

It is slightly modified code from example.c from jpeg-trubo (that code contained errors). When I try to write image data to file it fails when cinfo.next_scanline==9 it crashes on line with jpeg_write_scanlines. Error: SigSegv error.…
John Boe
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Android NDK - How can I decode, modify and then encode a JPG on a bytearray?

Tonight I'm working on Android. I've to decode, modify and then encode a JPG on a bytearray. I'm using NDK. Some people told me to use libjpeg-turbo. But I can't figure out how to add this lib to NDK. Any help please ?
Luca D'Amico
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