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Portable Network Graphics (PNG) Format Decoder

Portable Network Graphics (PNG) Format Decoder

Product
Details
System Requirements
Related Software
Related Hardware
Performance Metrics

Product Details

The PNG decoder is a lossless decoder used in Web browsers. It uses a modified form of LZ77 compression as in zlib.This implementation of the PNG Decoder has been highly optimized to run on the Analog Devices ADSP-BF5xx Blackfin processor. The data movement for the module can be configured for either cache mode or through MDMA. It is a self-contained software component that has been rigorously tested. It contains an intuitive C-callable API that is interruptible, maintains flexibility and provides seamless system integration.

Features

Cache: Both instruction and Data cache enabled
Code compatible across the Blackfin Processor Family ADSP-BF5xx
MISRA-C compliant
Target Processors : ADSP-BF561, ADSP-BF533, ADSP-BF527, ADSP-BF548
Release format : Object Code with source code wrapper
Input format : PNG
Output format : RGB
Image size : Configurable
Multi instancing : Fully re-entrant and multi-instance capable

Product Downloads

Download Production Code (Rev. 1.0.0)

System Requirements

Windows XP Professional SP3 (32-bit only).
Windows Vista Business/Enterprise/Ultimate SP2 (32-bit only). It is recommended to install the software in a non-UAC-protected location.
Windows 7 Professional/Enterprise/Ultimate (32 and 64-bit). It is recommended to install the software in a non-UAC-protected location.

Minimum of 2 GHz single core processor, 3.3 GHz dual core is recommended.
Minimum of 1 GB memory (RAM), 4 GB is recommended.
Minimum of 2 GB hard disk (HDD) space is required.

Related Software

VisualDSP++ 5.0 and Latest Update

Related Hardware

Processor: BF52x, BF53x, BF54x, BF561 processor families. Demonstration applications provided to on ADSP-BF527or ADSP-BF533 or ADSP-BF548 or ADSP-BF561 EZ-KIT Lite.

Hardware: One of the following development hardware combinations

Performance Metrics

MIPS summary:

			Memory (Bytes)				Performance
Module	Image Width	Image Height	Code	Stack	Data RAM	Data ROM	Average Cycles / pel	MIPS
Decode PNG	225	65	18522	440	47872	10429	203.72	44.69

Performance (average cycles per pel) measured on ADSP-BF533.
MIPS is measured as ((cycles/pel) * (image width) * (image height) * (frames/second) / 10^6). (It is assumed that frames/second = 15 for calculation)
Code compatible across all ADSP-BF5xx processors, with silicon anomaly workarounds implemented for ADSP-BF527(0.2), ADSP-BF533(0.6), ADSP-BF548(0.4) and ADSP-BF561(0.5)
"Data RAM" for one instance, includes Scratch and Instance/State

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Availability and Licensing

Each module supports the Analog Devices, Inc. (ADI) Blackfin or SHARC Processor family and is a licensed product that is available in object code format. Recipients must sign or accept a license agreement with ADI prior to being shipped or downloading the modules identified in the license agreement.