alsa:

- 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.

include/pa_linux_alsa.h

@@ -93,6 +93,13 @@ PaError PaAlsa_SetNumPeriods( int numPeriods );
  */
 PaError PaAlsa_SetRetriesBusy( int retries );
 
+/** Set the path and name of ALSA library file if PortAudio is configured to load it dynamically (see
+ *  PA_ALSA_DYNAMIC). This setting will overwrite the default name set by PA_ALSA_PATHNAME define.
+ * @param pathName Full path with filename. Only filename can be used, but dlopen() will lookup default
+ *                 searchable directories (/usr/lib;/usr/local/lib) then.
+ */
+void PaAlsa_SetLibraryPathName( const char *pathName );
+
 #ifdef __cplusplus
 }
 #endif