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Made NAS target dynamic, so you can safely include it in shipping bin…

…aries.
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icculus committed Sep 13, 2009
1 parent a3d27d0 commit 81244ca48c6ad91a86e90bdd07b90fe24f6a625e
Showing with 187 additions and 30 deletions.
  1. +44 −12 configure.in
  2. +1 −0 include/SDL_config.h.in
  3. +142 −18 src/audio/nas/SDL_nasaudio.c
@@ -591,30 +591,62 @@ CheckNAS()
AC_HELP_STRING([--enable-nas], [support the NAS audio API [[default=yes]]]),
, enable_nas=yes)
if test x$enable_audio = xyes -a x$enable_nas = xyes; then
save_LDFLAGS="$LDFLAGS"
LDFLAGS="$LDFLAGS -lXt -lm"
AC_CHECK_HEADER(audio/audiolib.h, have_audio_hdr=yes)
AC_CHECK_LIB(audio, AuOpenServer, have_audio_lib=yes)
AC_CHECK_HEADER(nas/audiolib.h, have_nas_hdr=yes)
AC_CHECK_LIB(nas, AuOpenServer, have_nas_lib=yes)
LDFLAGS="$save_LDFLAGS"
AC_CHECK_HEADER(audio/audiolib.h, have_nas_hdr=yes)
AC_CHECK_LIB(audio, AuOpenServer, have_nas_lib=yes)

AC_MSG_CHECKING(for NAS audio support)
have_nas=no
if test x$have_audio_hdr = xyes -a x$have_audio_lib = xyes; then

if test x$have_nas_hdr = xyes -a x$have_nas_lib = xyes; then
have_nas=yes
NAS_LIBS="-laudio"

elif test -r /usr/X11R6/include/audio/audiolib.h; then
have_nas=yes
NAS_LIBS="-laudio -lXt"
elif test x$have_nas_hdr = xyes -a x$have_nas_lib = xyes; then
NAS_CFLAGS="-I/usr/X11R6/include/"
NAS_LIBS="-L/usr/X11R6/lib -laudio -lXt"

dnl On IRIX, the NAS includes are in a different directory,
dnl and libnas must be explicitly linked in

elif test -r /usr/freeware/include/nas/audiolib.h; then
have_nas=yes
NAS_LIBS="-lnas -lXt"
fi
fi

AC_MSG_RESULT($have_nas)

if test x$have_nas = xyes; then
AC_ARG_ENABLE(nas-shared,
AC_HELP_STRING([--enable-nas-shared], [dynamically load NAS audio support [[default=yes]]]),
, enable_nas_shared=yes)
if test "x`echo $NAS_LIBS | grep -- -L`" = "x"; then
if test "x`ls /lib/libaudio.so.* 2> /dev/null`" != "x"; then
NAS_LIBS="-L/lib $NAS_LIBS"
elif test "x`ls /usr/lib/libaudio.so.* 2> /dev/null`" != "x"; then
NAS_LIBS="-L/usr/lib $NAS_LIBS"
elif test "x`ls /usr/local/lib/libaudio.so.* 2> /dev/null`" != "x"; then
NAS_LIBS="-L/usr/local/lib $NAS_LIBS"
fi
fi
nas_lib_spec=`echo $NAS_LIBS | sed 's/.*-L\([[^ ]]*\).*/\1\/libaudio.so.*/'`
nas_lib=`ls -- $nas_lib_spec | sed 's/.*\/\(.*\)/\1/; q'`
echo "-- $nas_lib_spec -> $nas_lib"

if test x$have_loadso != xyes && \
test x$enable_nas_shared = xyes; then
AC_MSG_WARN([You must have SDL_LoadObject() support for dynamic NAS loading])
fi
if test x$have_loadso = xyes && \
test x$enable_nas_shared = xyes && test x$nas_lib != x; then
AC_DEFINE_UNQUOTED(SDL_AUDIO_DRIVER_NAS_DYNAMIC, "$nas_lib")
else
EXTRA_LDFLAGS="$EXTRA_LDFLAGS $NAS_LIBS"
fi

AC_DEFINE(SDL_AUDIO_DRIVER_NAS)
SOURCES="$SOURCES $srcdir/src/audio/nas/*.c"
EXTRA_CFLAGS="$EXTRA_CFLAGS $NAS_CFLAGS"
EXTRA_LDFLAGS="$EXTRA_LDFLAGS $NAS_LIBS"
have_audio=yes
fi
fi
@@ -176,6 +176,7 @@
#undef SDL_AUDIO_DRIVER_MINT
#undef SDL_AUDIO_DRIVER_MMEAUDIO
#undef SDL_AUDIO_DRIVER_NAS
#undef SDL_AUDIO_DRIVER_NAS_DYNAMIC
#undef SDL_AUDIO_DRIVER_OSS
#undef SDL_AUDIO_DRIVER_OSS_SOUNDCARD_H
#undef SDL_AUDIO_DRIVER_PAUD
@@ -37,11 +37,122 @@
#include "../SDL_audiodev_c.h"
#include "SDL_nasaudio.h"

#ifdef SDL_AUDIO_DRIVER_NAS_DYNAMIC
#include "SDL_loadso.h"
#endif

/* The tag name used by artsc audio */
#define NAS_DRIVER_NAME "nas"

static struct SDL_PrivateAudioData *this2 = NULL;

static void (*NAS_AuCloseServer) (AuServer *);
static void (*NAS_AuNextEvent) (AuServer *, AuBool, AuEvent *);
static AuBool(*NAS_AuDispatchEvent) (AuServer *, AuEvent *);
static AuFlowID(*NAS_AuCreateFlow) (AuServer *, AuStatus *);
static void (*NAS_AuStartFlow) (AuServer *, AuFlowID, AuStatus *);
static void (*NAS_AuSetElements)
(AuServer *, AuFlowID, AuBool, int, AuElement *, AuStatus *);
static void (*NAS_AuWriteElement)
(AuServer *, AuFlowID, int, AuUint32, AuPointer, AuBool, AuStatus *);
static AuServer *(*NAS_AuOpenServer)
(_AuConst char *, int, _AuConst char *, int, _AuConst char *, char **);
static AuEventHandlerRec *(*NAS_AuRegisterEventHandler)
(AuServer *, AuMask, int, AuID, AuEventHandlerCallback, AuPointer);


#ifdef SDL_AUDIO_DRIVER_NAS_DYNAMIC

static const char *nas_library = SDL_AUDIO_DRIVER_NAS_DYNAMIC;
static void *nas_handle = NULL;

static int
load_nas_sym(const char *fn, void **addr)
{
*addr = SDL_LoadFunction(nas_handle, fn);
if (*addr == NULL) {
return 0;
}
return 1;
}

/* cast funcs to char* first, to please GCC's strict aliasing rules. */
#define SDL_NAS_SYM(x) \
if (!load_nas_sym(#x, (void **) (char *) &NAS_##x)) return -1
#else
#define SDL_NAS_SYM(x) NAS_##x = x
#endif

static int
load_nas_syms(void)
{
SDL_NAS_SYM(AuCloseServer);
SDL_NAS_SYM(AuNextEvent);
SDL_NAS_SYM(AuDispatchEvent);
SDL_NAS_SYM(AuCreateFlow);
SDL_NAS_SYM(AuStartFlow);
SDL_NAS_SYM(AuSetElements);
SDL_NAS_SYM(AuWriteElement);
SDL_NAS_SYM(AuOpenServer);
SDL_NAS_SYM(AuRegisterEventHandler);
return 0;
}

#undef SDL_NAS_SYM

#ifdef SDL_AUDIO_DRIVER_NAS_DYNAMIC

static void
UnloadNASLibrary(void)
{
if (nas_handle != NULL) {
SDL_UnloadObject(nas_handle);
nas_handle = NULL;
}
}

static int
LoadNASLibrary(void)
{
int retval = 0;
if (nas_handle == NULL) {
nas_handle = SDL_LoadObject(nas_library);
if (nas_handle == NULL) {
/* Copy error string so we can use it in a new SDL_SetError(). */
char *origerr = SDL_GetError();
size_t len = SDL_strlen(origerr) + 1;
char *err = (char *) alloca(len);
SDL_strlcpy(err, origerr, len);
retval = -1;
SDL_SetError("NAS: SDL_LoadObject('%s') failed: %s\n",
nas_library, err);
} else {
retval = load_nas_syms();
if (retval < 0) {
UnloadNASLibrary();
}
}
}
return retval;
}

#else

static void
UnloadNASLibrary(void)
{
}

static int
LoadNASLibrary(void)
{
load_nas_syms();
return 0;
}

#endif /* SDL_AUDIO_DRIVER_NAS_DYNAMIC */


/* Audio driver functions */
static int NAS_OpenAudio(_THIS, SDL_AudioSpec *spec);
static void NAS_WaitAudio(_THIS);
@@ -53,15 +164,22 @@ static void NAS_CloseAudio(_THIS);

static int Audio_Available(void)
{
AuServer *aud = AuOpenServer("", 0, NULL, 0, NULL, NULL);
if (!aud) return 0;

AuCloseServer(aud);
return 1;
if (LoadNASLibrary() == 0) {
AuServer *aud = NAS_AuOpenServer("", 0, NULL, 0, NULL, NULL);
if (!aud) {
UnloadNASLibrary();
return 0;
}
NAS_AuCloseServer(aud);
UnloadNASLibrary();
return 1;
}
return 0;
}

static void Audio_DeleteDevice(SDL_AudioDevice *device)
{
UnloadNASLibrary();
SDL_free(device->hidden);
SDL_free(device);
}
@@ -70,6 +188,10 @@ static SDL_AudioDevice *Audio_CreateDevice(int devindex)
{
SDL_AudioDevice *this;

if (LoadNASLibrary() < 0) {
return NULL;
}

/* Initialize all variables that we clean on shutdown */
this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice));
if ( this ) {
@@ -82,7 +204,7 @@ static SDL_AudioDevice *Audio_CreateDevice(int devindex)
if ( this ) {
SDL_free(this);
}
return(0);
return NULL;
}
SDL_memset(this->hidden, 0, (sizeof *this->hidden));

@@ -108,8 +230,8 @@ static void NAS_WaitAudio(_THIS)
{
while ( this->hidden->buf_free < this->hidden->mixlen ) {
AuEvent ev;
AuNextEvent(this->hidden->aud, AuTrue, &ev);
AuDispatchEvent(this->hidden->aud, &ev);
NAS_AuNextEvent(this->hidden->aud, AuTrue, &ev);
NAS_AuDispatchEvent(this->hidden->aud, &ev);
}
}

@@ -119,13 +241,13 @@ static void NAS_PlayAudio(_THIS)
in the hope that some of them is LowWater events telling us more
of the buffer is free now than what we think. */
AuEvent ev;
AuNextEvent(this->hidden->aud, AuTrue, &ev);
AuDispatchEvent(this->hidden->aud, &ev);
NAS_AuNextEvent(this->hidden->aud, AuTrue, &ev);
NAS_AuDispatchEvent(this->hidden->aud, &ev);
}
this->hidden->buf_free -= this->hidden->mixlen;

/* Write the audio data */
AuWriteElement(this->hidden->aud, this->hidden->flow, 0, this->hidden->mixlen, this->hidden->mixbuf, AuFalse, NULL);
NAS_AuWriteElement(this->hidden->aud, this->hidden->flow, 0, this->hidden->mixlen, this->hidden->mixbuf, AuFalse, NULL);

this->hidden->written += this->hidden->mixlen;

@@ -146,7 +268,7 @@ static void NAS_CloseAudio(_THIS)
this->hidden->mixbuf = NULL;
}
if ( this->hidden->aud ) {
AuCloseServer(this->hidden->aud);
NAS_AuCloseServer(this->hidden->aud);
this->hidden->aud = 0;
}
}
@@ -211,6 +333,7 @@ event_handler(AuServer* aud, AuEvent* ev, AuEventHandlerRec* hnd)
static AuDeviceID
find_device(_THIS, int nch)
{
/* These "Au" things are all macros, not functions... */
int i;
for (i = 0; i < AuServerNumDevices(this->hidden->aud); i++) {
if ((AuDeviceKind(AuServerDevice(this->hidden->aud, i)) ==
@@ -246,16 +369,16 @@ static int NAS_OpenAudio(_THIS, SDL_AudioSpec *spec)
}
spec->format = test_format;

this->hidden->aud = AuOpenServer("", 0, NULL, 0, NULL, NULL);
this->hidden->aud = NAS_AuOpenServer("", 0, NULL, 0, NULL, NULL);
if (this->hidden->aud == 0)
{
SDL_SetError("Couldn't open connection to NAS server");
return (-1);
}

this->hidden->dev = find_device(this, spec->channels);
if ((this->hidden->dev == AuNone) || (!(this->hidden->flow = AuCreateFlow(this->hidden->aud, NULL)))) {
AuCloseServer(this->hidden->aud);
if ((this->hidden->dev == AuNone) || (!(this->hidden->flow = NAS_AuCreateFlow(this->hidden->aud, NULL)))) {
NAS_AuCloseServer(this->hidden->aud);
this->hidden->aud = 0;
SDL_SetError("Couldn't find a fitting playback device on NAS server");
return (-1);
@@ -273,15 +396,16 @@ static int NAS_OpenAudio(_THIS, SDL_AudioSpec *spec)

this2 = this->hidden;

/* These "Au" things without a NAS_ prefix are macros, not functions... */
AuMakeElementImportClient(elms, spec->freq, format, spec->channels, AuTrue,
buffer_size, buffer_size / 4, 0, NULL);
AuMakeElementExportDevice(elms+1, 0, this->hidden->dev, spec->freq,
AuUnlimitedSamples, 0, NULL);
AuSetElements(this->hidden->aud, this->hidden->flow, AuTrue, 2, elms, NULL);
AuRegisterEventHandler(this->hidden->aud, AuEventHandlerIDMask, 0, this->hidden->flow,
NAS_AuSetElements(this->hidden->aud, this->hidden->flow, AuTrue, 2, elms, NULL);
NAS_AuRegisterEventHandler(this->hidden->aud, AuEventHandlerIDMask, 0, this->hidden->flow,
event_handler, (AuPointer) NULL);

AuStartFlow(this->hidden->aud, this->hidden->flow, NULL);
NAS_AuStartFlow(this->hidden->aud, this->hidden->flow, NULL);

/* Allocate mixing buffer */
this->hidden->mixlen = spec->size;

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