PNG Format Decoder, Blackfin

The Portable Network Graphics (PNG) Format Decoder library for the Blackfin processor implements a PNG decoder, which is a lossless decoder used in Web browsers.
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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 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.

Licensing

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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.


Performance Metrics

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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

Systems Requirements

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  • 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 Hardware

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