- implemented dynamic ALSA loading, you shall define PA_ALSA_DYNAMIC when compiling PortAudio library, by default PortAudio will use compile time linkage;
- added PA_ALSA_PATHNAME define to redefine ALSA library path and filename to some other name and location, has effect only together with PA_ALSA_DYNAMIC;
- added extension function (PaAlsa_SetLibraryPathName) which allows to set ALSA library path and filename during application run-time overwriting default set by PA_ALSA_PATHNAME during compilation;
- added API compatibility with Android OS (although ALSA may not be available on your device and usually requires 'root' access rights to open an audio device), some missing ALSA functions are replaced with stubs (needs more input from interested parties), to compile on Android you need to add ALSA headers (get it from Android GIT source-code tree) to compiler's searchable path.
- fixed callback thread to exit normally if error condition was satisfied during stream processing (OnExit wasn't called), it was possible cause of crash if error happened inside the thread
- modified processing thread to timeout during poll() within around 2 seconds instead of 64 milliseconds, this will help to fix problems on systems with low processing power and possible CPU overloading, like portable ARM devices
- timeout of poll() will not cause stream to stop but will cause Alsa stream restart, poll timeout will now set 'xrun' event to 1
- fixed blocking interface, Input and Output
- improved Exclusive Input device latency tunning
- applied path provided by Jean-François Charron (D-BOX Technologies Inc.) which improves handling of COM objects in multi-threaded environment and initialization stage which could under certain conditions return paNoError event when initialization failed
- using WAVE_FORMAT_PCM for mono/stereo 8/16-bit stream configuration to avoid possible driver refusal upon audio client creation
- modified default speaker mask for 5.1 and 7.1 configuration to _SURROUND (correct) versions, added default speaker configuration for 2.1, 4.1, 6.1 cases
- fixed compile under MinGW64 compiler (gcc version 4.5.1 20100702)
- cleaned portability typedefs, thanks to MinGW64 project added KS headers which also work well for MinGW32 (tested: gcc version 4.5.0)
wdmks:
- made it possible to use additional WDM/KS info for WMME/DS back-ends by defining PAWIN_USE_WDMKS_DEVICE_INFO for compilation by MinGW32/64 compilers if you include modified headers located in '\src\hostapi\wasapi\mingw-include'
- fixed alignment missing for host buffer if overall buffer size was set to less than 3ms that results in device timeout
- advanced Event driven mode and extended the range of host buffer size which can operate in this mode up up to 20.66 ms, e.g. your device buffer size will vary in range 3 - 20.66 ms, if goes above then Poll driven mode is switched on automatically
