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readme.txt
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************************************************************************
Fixed Point SILK SDK 1.0.8 beta source code package
Copyright 2010 (c), Skype Limited
https://developer.skype.com/silk/
************************************************************************
Date: 15/06/2011 (Format: DD/MM/YYYY)
I. Description
This package contains files for compilation and evaluation of the fixed
point SILK SDK library. The following is included in this package:
o Source code for the fixed point SILK SDK library
o Source code for creating encoder and decoder executables
o Test vectors
o Comparison tool
o Microsoft Visual Studio solution and project files
o Makefile for GNU C-compiler (GCC)
II. Files and Folders
o doc/ - contains more information about the SILK SDK
o interface/ - contains API header files
o src/ - contains all SILK SDK library source files
o test/ - contains source files for testing the SILK SDK
o test_vectors/ - contains test vectors
o Makefile - Makefile for compiling with GCC
o readme.txt - this file
o Silk_SDK.sln - Visual Studio solution for all SILK SDK code
III. How to use the Makefile
1. How to clean and compile the SILK SDK library:
make clean lib
2. How to compile an encoder executable:
make encoder
3. How to compile a decoder executable:
make decoder
4. How to compile the comparison tool:
make signalcompare
5. How to clean and compile all of the above:
make clean all
6. How to clean and compile for ARM based device using a cross compiler:
make clean all TOOLCHAIN_PREFIX=(1) TARGET_CPU=(2) TARGET_ARCH=(3)
(1) Compiler toolchain prefix, most cross-compilers do need to specify that.
(2) Target CPU, e.g. arm1136jf-s or cortex-a8, depends on the compiler. (makefile passes -mcpu= to the compiler)
(3) Target architecture, e.g. armv6 or armv7, depends on the compiler. (makefile passes -march= to the compiler)
7. How to build for big endian CPU's
make clean all ADDED_DEFINES+=_SYSTEM_IS_BIG_ENDIAN
To be able to use the test vectors with big endian CPU's the test programs
need to be compiled in a different way. Note that the 16 bit input and output
from the test programs will have the upper and lower bytes swapped with this setting.
8. How to build native C code (no assembly code)
make clean all ADDED_DEFINES+=NO_ASM
9. How to use the comparison tool:
See 'How to use the test vectors.txt' in the test_vectors folder.
IV. History
Version 1.0.8 - Improved noise shaping, various other improvements, and various bugfixes. Added a MIPS version
Version 1.0.7 - Updated with bugfixes for LBRR and pitch estimator. SignalCompare updated
Version 1.0.6 - Updated with bugfixes for ARM builds
Version 1.0.5 - Updated with bugfixes for ARM builds
Version 1.0.4 - Updated with various bugfixes and improvements, including some API changes
Added support for big endian platforms
Added resampler support for additional API sample rates
Version 1.0.3 - Updated with various bugfixes and improvements
Version 1.0.2 - Updated with various bugfixes and improvements
Version 1.0.1 - First beta source code release
V. Compatibility
This package has been tested on the following platforms:
X86/X64:
Windows XP Home and Professional
Windows Vista, 32-bit version
Mac OS X intel
Mac OS X ppc
Ubuntu Linux 9.10, 64-bit version
ARM:
Maemo with N800/N810/N900 devices, only GNU AS format is currently supported
VI. Known Issues
None
VII. Additional Resources
For more information, visit the SILK SDK web site at:
<https://developer.skype.com/silk/>