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diff --git a/portaudio/src/hostapi/asio/ASIO-README.txt b/portaudio/src/hostapi/asio/ASIO-README.txt new file mode 100644 index 0000000..bc86caa --- /dev/null +++ b/portaudio/src/hostapi/asio/ASIO-README.txt @@ -0,0 +1,147 @@ +ASIO-README.txt + +This document contains information to help you compile PortAudio with +ASIO support. If you find any omissions or errors in this document +please notify us on the PortAudio mailing list. + +NOTE: The Macintosh sections of this document are provided for historical +reference. They refer to pre-OS X Macintosh. PortAudio no longer +supports pre-OS X Macintosh. Steinberg does not support ASIO on Mac OS X. + + +Building PortAudio with ASIO support +------------------------------------ + +To build PortAudio with ASIO support you need to compile and link with +pa_asio.c, and files from the ASIO SDK (see below), along with the common +PortAudio files from src/common/ and platform specific files from +src/os/win/ (for Win32). + +If you are compiling with a non-Microsoft compiler on Windows, also +compile and link with iasiothiscallresolver.cpp (see below for +an explanation). + +For some platforms (MingW, Cygwin/MingW), you may simply +be able to type: + +./configure --with-host_os=mingw --with-winapi=asio [--with-asiodir=/usr/local/asiosdk2] +make + +and life will be good. Make sure you update the above with the correct local +path to the ASIO SDK. + + +For Microsoft Visual C++ there is an build tutorial here: +http://www.portaudio.com/trac/wiki/TutorialDir/Compile/WindowsASIOMSVC + + + +Obtaining the ASIO SDK +---------------------- + +In order to build PortAudio with ASIO support, you need to download +the ASIO SDK (version 2.0 or later) from Steinberg. Steinberg makes the ASIO +SDK available to anyone free of charge, however they do not permit its +source code to be distributed. + +NOTE: In some cases the ASIO SDK may require patching, see below +for further details. + +http://www.steinberg.net/en/company/developer.html + +If the above link is broken search Google for: +"download steinberg ASIO SDK" + + + +Building the ASIO SDK on Windows +-------------------------------- + +To build the ASIO SDK on Windows you need to compile and link with the +following files from the ASIO SDK: + +asio_sdk\common\asio.cpp +asio_sdk\host\asiodrivers.cpp +asio_sdk\host\pc\asiolist.cpp + +You may also need to adjust your include paths to support inclusion of +header files from the above directories. + +The ASIO SDK depends on the following COM API functions: +CoInitialize, CoUninitialize, CoCreateInstance, CLSIDFromString +For compilation with MinGW you will need to link with -lole32, for +Borland compilers link with Import32.lib. + + + +Non-Microsoft (MSVC) Compilers on Windows including Borland and GCC +------------------------------------------------------------------- + +Steinberg did not specify a calling convention in the IASIO interface +definition. This causes the Microsoft compiler to use the proprietary +thiscall convention which is not compatible with other compilers, such +as compilers from Borland (BCC and C++Builder) and GNU (gcc). +Steinberg's ASIO SDK will compile but crash on initialization if +compiled with a non-Microsoft compiler on Windows. + +PortAudio solves this problem using the iasiothiscallresolver library +which is included in the distribution. When building ASIO support for +non-Microsoft compilers, be sure to compile and link with +iasiothiscallresolver.cpp. Note that iasiothiscallresolver includes +conditional directives which cause it to have no effect if it is +compiled with a Microsoft compiler, or on the Macintosh. + +If you use configure and make (see above), this should be handled +automatically for you. + +For further information about the IASIO thiscall problem see this page: +http://www.rossbencina.com/code/iasio-thiscall-resolver + + + +Building the ASIO SDK on (Pre-OS X) Macintosh +--------------------------------------------- + +To build the ASIO SDK on Macintosh you need to compile and link with the +following files from the ASIO SDK: + +host/asiodrivers.cpp +host/mac/asioshlib.cpp +host/mac/codefragements.cpp + +You may also need to adjust your include paths to support inclusion of +header files from the above directories. + + + +(Pre-OS X) Macintosh ASIO SDK Bug Patch +--------------------------------------- + +There is a bug in the ASIO SDK that causes the Macintosh version to +often fail during initialization. Below is a patch that you can apply. + +In codefragments.cpp replace getFrontProcessDirectory function with +the following one (GetFrontProcess replaced by GetCurrentProcess). + + +bool CodeFragments::getFrontProcessDirectory(void *specs) +{ + FSSpec *fss = (FSSpec *)specs; + ProcessInfoRec pif; + ProcessSerialNumber psn; + + memset(&psn,0,(long)sizeof(ProcessSerialNumber)); + // if(GetFrontProcess(&psn) == noErr) // wrong !!! + if(GetCurrentProcess(&psn) == noErr) // correct !!! + { + pif.processName = 0; + pif.processAppSpec = fss; + pif.processInfoLength = sizeof(ProcessInfoRec); + if(GetProcessInformation(&psn, &pif) == noErr) + return true; + } + return false; +} + + +### |