181 lines
5.2 KiB
Plaintext
181 lines
5.2 KiB
Plaintext
SoX Resampler Library Copyright (c) 2007-16 robs@users.sourceforge.net
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INSTALLATION GUIDE CONTENTS
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* Standard build
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* Build customisation
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* Cross-compilation
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* Integration with other build systems
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* Run-time configuration
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STANDARD BUILD
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1. Prerequisites:
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Before you can build this library, you need to have available on your
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system:
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* A C-compiler with 64-bit integer support and, optionally, OpenMP, SIMD.
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* A 'make' utility (most compiler installations already have one of these).
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* CMake: https://cmake.org/download/
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2. Build:
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At a command prompt, change directory (`cd') to the one containing this
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file, then enter:
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go (on MS-Windows with nmake)
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or
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./go (on Unix-like systems)
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This should build the library and run a few sanity tests.
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3. Installation:
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Note that this step may need to be performed by a system
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administrator. Enter:
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nmake install (on MS-Windows)
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or
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cd Release; make install (on Unix-like)
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4. Preparation for use:
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To use the library you may need to set up appropriate paths to the
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library and its header file in your development environment.
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5. Installation test
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To test the installation, build and run some of the example programmes
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(see examples/README).
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BUILD CUSTOMISATION
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If it is necessary to customise the build, then steps 2 and 3 above may be
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substituted as follows. Change directory to the one containing this file,
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then enter commands along the lines of:
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mkdir build
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cd build
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cmake [OPTIONS] ..
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make
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make test
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sudo make install
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To list help on the available options, enter:
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cmake -LH ..
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Options, if given, should be preceded with '-D', e.g.
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cmake -DBUILD_SHARED_LIBS:BOOL=OFF ..
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Resampling engines
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As available on a given system, options for including up to five resampling
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‘engines’ are available (per above) as follows:
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WITH_CR32: for constant-rate HQ resampling,
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WITH_CR32S: SIMD variant of previous,
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WITH_CR64: for constant-rate VHQ resampling,
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WITH_CR64S: SIMD variant of previous,
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WITH_VR32: for variable-rate HQ resampling.
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By default, these options are all set to ON.
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When both SIMD and non-SIMD engine variants are included, run-time selection
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is automatic (based on CPU capability) for x86 CPUs, and can be automatic for
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ARM CPUs if the 3rd-party library `libavutil' is available at libsoxr
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build-time.
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CROSS-COMPILATION
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E.g. targeting a Linux ARM system:
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mkdir build
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cd build
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cmake -DCMAKE_SYSTEM_NAME=Linux \
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-DCMAKE_C_COMPILER=arm-linux-gnueabi-gcc \
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..
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or, also building the examples (one of which uses C++):
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cmake -DCMAKE_SYSTEM_NAME=Linux \
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-DCMAKE_C_COMPILER=arm-linux-gnueabi-gcc \
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-DCMAKE_CXX_COMPILER=arm-linux-gnueabi-g++ \
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-DBUILD_EXAMPLES=1 \
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..
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E.g. with Mingw (Linux host), using a tool-chain file:
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mkdir build
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cd build
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cmake -DCMAKE_TOOLCHAIN_FILE=~/Toolchain-x86_64-mingw-w64-mingw32.cmake \
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-DCMAKE_INSTALL_PREFIX=install \
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..
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make
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where ~/Toolchain-x86_64-mingw-w64-mingw32.cmake might contain:
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SET(CMAKE_SYSTEM_NAME Windows)
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SET(CMAKE_C_COMPILER /usr/bin/x86_64-w64-mingw32-gcc)
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SET(CMAKE_CXX_COMPILER /usr/bin/x86_64-w64-mingw32-g++)
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SET(CMAKE_RC_COMPILER /usr/bin/x86_64-w64-mingw32-windres)
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SET(CMAKE_Fortran_COMPILER /usr/bin/x86_64-w64-mingw32-gfortran)
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SET(CMAKE_AR:FILEPATH /usr/bin/x86_64-w64-mingw32-ar)
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SET(CMAKE_RANLIB:FILEPATH /usr/bin/x86_64-w64-mingw32-ranlib)
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SET(CMAKE_FIND_ROOT_PATH /usr/x86_64-w64-mingw32)
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SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
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SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
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SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
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SET(QT_BINARY_DIR /usr/x86_64-w64-mingw32/bin /usr/bin)
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SET(Boost_COMPILER -gcc47)
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INTEGRATION WITH OTHER BUILD SYSTEMS
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Autotools-based systems might find it useful to create a file called
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`configure' in the directory containing this file, consisting of the line:
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cmake -DBUILD_SHARED_LIBS=OFF .
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(or with other build options as required).
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For MS Visual C++, see msvc/README.
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RUN-TIME CONFIGURATION
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The libsoxr API structure ‘soxr_runtime_spec_t’ allows application developers
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to optimise some aspects of libsoxr’s operation for a particular application.
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However, since optimal performance might depend on an individual end-user’s
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run-time system and the end-user’s preferences, environment variables are
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available to set (override) run-time parameters as follows:
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Env. variable Equivalent soxr_runtime_spec_t item
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------------------ -----------------------------------
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SOXR_COEFS_SIZE coef_size_kbytes
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SOXR_COEF_INTERP SOXR_COEF_INTERP_xxx
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SOXR_LARGE_DFT_SIZE log2_large_dft_size
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SOXR_MIN_DFT_SIZE log2_min_dft_size
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SOXR_NUM_THREADS num_threads
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Additionally, the SOXR_USE_SIMD32 and SOXR_USE_SIMD64 environment variables
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may be used to override automatic selection (or to provide manual selection
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where automatic selection is not available) between SIMD and non-SIMD engine
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variants. (Which engine is selected for a specific configuration of libsoxr
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can be checked using example #3, which reports it.)
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