************************************************************************ Fixed Point SILK SDK 1.0.9 ARM source code package Copyright 2012 (c), Skype Limited https://developer.skype.com/silk/ ************************************************************************ Date: 03/08/2012 (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 solutions 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 2010 solution for all SILK SDK code o Silk_SDK_VS2005.sln - Visual Studio 2005 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 1.0.9 - Added 64-bit support. Added iOS LLVM compiler support. Lowered DTX mode bitrate. Bugfixes for ARM builds. Various other small fixes. 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: Windows 7 Professional, 32-bit version, Intel Core i7 CPU Windows 7 Professional, 64-bit version, Intel Core i7 CPU Mac OS X Version 10.7.4, 64-bit version, Intel Core i7 CPU Ubuntu Linux 10.04 LTS, 32-bit version, Intel Core i7 CPU Ubuntu Linux 12.04 LTS, 64-bit version, Intel Core 2 Duo CPU ARM: Android 2.3, compiled with NDK r7. iOS 5.0 VI. Known Issues None VII. Additional Resources For more information, visit the SILK SDK web site at: <https://developer.skype.com/silk/>