Add Sun/NetBSD hostapi

This hostapi has been available in the pkgsrc package for PortAudio
for over a year (we build for Solaris and NetBSD). It was inspired by
problems interfacing between PortAudio's OSS hostapi and NetBSD's OSS
compatibility layer that I couldn't fix without adding very ugly hacks
to the OSS hostapi - in the end I decided to write a new, clean one for
the native interface.

Tested building with the autotools and CMake build systems.
Test and example programs work.

CMakeLists.txt

@@ -310,6 +310,13 @@ elseif(UNIX)
       # The FindOSS.cmake module does not need to be installed like the JACK modules because it
       # does not link any library; it only adds an include directory and compile definition.
     endif()
+
+    CHECK_INCLUDE_FILE(sys/audioio.h HAVE_SYS_AUDIOIO_H)
+    cmake_dependent_option(SUN "Enable support for Sun/NetBSD Audio" ON "SUN_FOUND" SUN)
+    if(SUN AND HAVE_SYS_AUDIOIO_H)
+      target_sources(PortAudio PRIVATE src/hostapi/sun/pa_unix_sun.c)
+      target_compile_definitions(PortAudio PRIVATE PA_USE_SUN=1)
+    endif()
   endif()
 endif()
 

Makefile.in

@@ -146,6 +146,7 @@ SRC_DIRS = \
 	src/hostapi/dsound \
 	src/hostapi/jack \
 	src/hostapi/oss \
+	src/hostapi/sun \
 	src/hostapi/skeleton \
 	src/hostapi/wasapi \
 	src/hostapi/wdmks \

README.md

@@ -40,6 +40,7 @@ Please feel free to join. See http://www.portaudio.com for details.
     src/hostapi/dsound      = Windows Direct Sound
     src/hostapi/jack        = JACK Audio Connection Kit
     src/hostapi/oss         = Unix Open Sound System (OSS)
+    src/hostapi/sun         = /dev/audio (Sun/NetBSD Audio)
     src/hostapi/wasapi      = Windows Vista WASAPI
     src/hostapi/wdmks       = Windows WDM Kernel Streaming
     src/hostapi/wmme        = Windows MultiMedia Extensions (MME)

configure.in

@@ -41,6 +41,10 @@ AC_ARG_WITH(oss,
             AS_HELP_STRING([--with-oss], [Enable support for OSS @<:@autodetect@:>@]),
             [with_oss=$withval])
 
+AC_ARG_WITH(sun,
+            AS_HELP_STRING([--with-sun], [Enable support for Sun/NetBSD @<:@autodetect@:>@]),
+            [with_sun=$withval])
+
 AC_ARG_WITH(asihpi,
             AS_HELP_STRING([--with-asihpi], [Enable support for ASIHPI @<:@autodetect@:>@]),
             [with_asihpi=$withval])
@@ -141,6 +145,10 @@ if test "x$with_oss" != "xno"; then
         AC_CHECK_LIB(ossaudio, _oss_ioctl, have_libossaudio=yes, have_libossaudio=no)
     fi
 fi
+have_sun=no
+if test "x$with_sun" != "xno"; then
+    AC_CHECK_HEADERS([sys/audioio.h], [have_sun=yes])
+fi
 have_jack=no
 if test "x$with_jack" != "xno"; then
     PKG_CHECK_MODULES(JACK, jack, have_jack=yes, have_jack=no)
@@ -386,6 +394,11 @@ case "${host_os}" in
            AC_DEFINE(PA_USE_OSS,1)
         fi
 
+        if [[ "$with_sun" != "no" ]] ; then
+           OTHER_OBJS="$OTHER_OBJS src/hostapi/sun/pa_unix_sun.o"
+           AC_DEFINE(PA_USE_SUN,1)
+        fi
+
         if [[ "$have_asihpi" = "yes" ] && [ "$with_asihpi" != "no" ]] ; then
            LIBS="$LIBS -lhpi"
            DLL_LIBS="$DLL_LIBS -lhpi"
@@ -473,6 +486,7 @@ case "$target_os" in
      *)
 	AC_MSG_RESULT([
   OSS ......................... $have_oss
+  Sun/NetBSD .................. $have_sun
   JACK ........................ $have_jack
 ])
         ;;

include/portaudio.h

@@ -287,7 +287,8 @@ typedef enum PaHostApiTypeId
     paWDMKS=11,
     paJACK=12,
     paWASAPI=13,
-    paAudioScienceHPI=14
+    paAudioScienceHPI=14,
+    paSun=15
 } PaHostApiTypeId;