Added an SDL2 OpenBSD sndio(7) audio target.
authorRyan C. Gordon <icculus@icculus.org>
Sun, 07 Jul 2013 02:03:07 -0400
changeset 7367 d6eabafa8776
parent 7366 38c6f26bb010
child 7368 0e12e09df086
Added an SDL2 OpenBSD sndio(7) audio target.
CMakeLists.txt
cmake/sdlchecks.cmake
configure.in
include/SDL_config.h.cmake
include/SDL_config.h.in
src/audio/SDL_audio.c
src/audio/sndio/SDL_sndioaudio.c
src/audio/sndio/SDL_sndioaudio.h
--- a/CMakeLists.txt	Sun Jul 07 02:04:19 2013 -0400
+++ b/CMakeLists.txt	Sun Jul 07 02:03:07 2013 -0400
@@ -203,6 +203,7 @@
 set_option(ARTS                "Support the Analog Real Time Synthesizer" ${UNIX_SYS})
 dep_option(ARTS_SHARED         "Dynamically load aRts audio support" ON "ARTS" OFF)
 set_option(NAS                 "Support the NAS audio API" ${UNIX_SYS})
+set_option(SNDIO               "Support the sndio audio API" ${UNIX_SYS})
 set_option(RPATH               "Use an rpath when linking SDL" ${UNIX_SYS})
 set_option(CLOCK_GETTIME       "Use clock_gettime() instead of gettimeofday()" OFF)
 set_option(INPUT_TSLIB         "Use the Touchscreen library for input" ${UNIX_SYS})
@@ -621,6 +622,7 @@
     CheckESD()
     CheckARTS()
     CheckNAS()
+    CheckSNDIO()
     CheckFusionSound()
   endif(SDL_AUDIO)
 
--- a/cmake/sdlchecks.cmake	Sun Jul 07 02:04:19 2013 -0400
+++ b/cmake/sdlchecks.cmake	Sun Jul 07 02:03:07 2013 -0400
@@ -226,6 +226,37 @@
 endmacro(CheckNAS)
 
 # Requires:
+# - n/a
+# Optional:
+# - SNDIO_SHARED opt
+# - HAVE_DLOPEN opt
+macro(CheckSNDIO)
+  if(SNDIO)
+    # TODO: set include paths properly, so the sndio headers are found
+    check_include_file(sndio.h HAVE_SNDIO_H)
+    find_library(D_SNDIO_LIB audio)
+    if(HAVE_SNDIO_H AND D_SNDIO_LIB)
+      set(HAVE_SNDIO TRUE)
+      file(GLOB SNDIO_SOURCES ${SDL2_SOURCE_DIR}/src/audio/sndio/*.c)
+      set(SOURCE_FILES ${SOURCE_FILES} ${SNDIO_SOURCES})
+      set(SDL_AUDIO_DRIVER_SNDIO 1)
+      if(SNDIO_SHARED)
+        if(NOT HAVE_DLOPEN)
+          message_warn("You must have SDL_LoadObject() support for dynamic sndio loading")
+        else()
+          get_filename_component(F_SNDIO_LIB ${D_SNDIO_LIB} NAME)
+          set(SDL_AUDIO_DRIVER_SNDIO_DYNAMIC "\"${F_SNDIO_LIB}\"")
+          set(HAVE_SNDIO_SHARED TRUE)
+        endif(NOT HAVE_DLOPEN)
+      else(SNDIO_SHARED)
+        list(APPEND EXTRA_LIBS ${D_SNDIO_LIB})
+      endif(SNDIO_SHARED)
+      set(HAVE_SDL_AUDIO TRUE)
+    endif(HAVE_SNDIO_H AND D_SNDIO_LIB)
+  endif(SNDIO)
+endmacro(CheckSNDIO)
+
+# Requires:
 # - PkgCheckModules
 # Optional:
 # - FUSIONSOUND_SHARED opt
--- a/configure.in	Sun Jul 07 02:04:19 2013 -0400
+++ b/configure.in	Sun Jul 07 02:03:07 2013 -0400
@@ -910,6 +910,52 @@
     fi
 }
 
+dnl See if the sndio audio interface is supported
+CheckSNDIO()
+{
+    AC_ARG_ENABLE(sndio,
+AC_HELP_STRING([--enable-sndio], [support the sndio audio API [[default=yes]]]),
+                  , enable_sndio=yes)
+    if test x$enable_audio = xyes -a x$enable_sndio = xyes; then
+        AC_CHECK_HEADER(sndio.h, have_sndio_hdr=yes)
+        AC_CHECK_LIB(sndio, sio_open, have_sndio_lib=yes)
+
+        AC_MSG_CHECKING(for sndio audio support)
+        have_sndio=no
+
+        if test x$have_sndio_hdr = xyes -a x$have_sndio_lib = xyes; then
+            have_sndio=yes
+            SNDIO_LIBS="-lsndio"
+        fi
+
+        AC_MSG_RESULT($have_sndio)
+
+        if test x$have_sndio = xyes; then
+            AC_ARG_ENABLE(sndio-shared,
+AC_HELP_STRING([--enable-sndio-shared], [dynamically load sndio audio support [[default=yes]]]),
+                          , enable_sndio_shared=yes)
+            sndio_lib=[`find_lib "libsndio.so.*" "$SNDIO_LIBS" | sed 's/.*\/\(.*\)/\1/; q'`]
+
+            if test x$have_loadso != xyes && \
+               test x$enable_sndio_shared = xyes; then
+                AC_MSG_WARN([You must have SDL_LoadObject() support for dynamic sndio loading])
+            fi
+            if test x$have_loadso = xyes && \
+               test x$enable_sndio_shared = xyes && test x$sndio_lib != x; then
+                echo "-- dynamic libsndio -> $sndio_lib"
+                AC_DEFINE_UNQUOTED(SDL_AUDIO_DRIVER_SNDIO_DYNAMIC, "$sndio_lib", [ ])
+            else
+                EXTRA_LDFLAGS="$EXTRA_LDFLAGS $SNDIO_LIBS"
+            fi
+
+            AC_DEFINE(SDL_AUDIO_DRIVER_SNDIO, 1, [ ])
+            SOURCES="$SOURCES $srcdir/src/audio/sndio/*.c"
+            EXTRA_CFLAGS="$EXTRA_CFLAGS $SNDIO_CFLAGS"
+            have_audio=yes
+        fi
+    fi
+}
+
 dnl rcg07142001 See if the user wants the disk writer audio driver...
 CheckDiskAudio()
 {
@@ -2262,6 +2308,7 @@
         CheckARTSC
         CheckESD
         CheckNAS
+        CheckSNDIO
         CheckX11
         CheckDirectFB
         CheckFusionSound
--- a/include/SDL_config.h.cmake	Sun Jul 07 02:04:19 2013 -0400
+++ b/include/SDL_config.h.cmake	Sun Jul 07 02:03:07 2013 -0400
@@ -195,6 +195,8 @@
 #cmakedefine SDL_AUDIO_DRIVER_ESD_DYNAMIC @SDL_AUDIO_DRIVER_ESD_DYNAMIC@
 #cmakedefine SDL_AUDIO_DRIVER_NAS @SDL_AUDIO_DRIVER_NAS@
 #cmakedefine SDL_AUDIO_DRIVER_NAS_DYNAMIC @SDL_AUDIO_DRIVER_NAS_DYNAMIC@
+#cmakedefine SDL_AUDIO_DRIVER_SNDIO @SDL_AUDIO_DRIVER_SNDIO@
+#cmakedefine SDL_AUDIO_DRIVER_SNDIO_DYNAMIC @SDL_AUDIO_DRIVER_SNDIO_DYNAMIC@
 #cmakedefine SDL_AUDIO_DRIVER_OSS @SDL_AUDIO_DRIVER_OSS@
 #cmakedefine SDL_AUDIO_DRIVER_OSS_SOUNDCARD_H @SDL_AUDIO_DRIVER_OSS_SOUNDCARD_H@
 #cmakedefine SDL_AUDIO_DRIVER_PAUDIO @SDL_AUDIO_DRIVER_PAUDIO@
--- a/include/SDL_config.h.in	Sun Jul 07 02:04:19 2013 -0400
+++ b/include/SDL_config.h.in	Sun Jul 07 02:03:07 2013 -0400
@@ -199,6 +199,8 @@
 #undef SDL_AUDIO_DRIVER_ESD_DYNAMIC
 #undef SDL_AUDIO_DRIVER_NAS
 #undef SDL_AUDIO_DRIVER_NAS_DYNAMIC
+#undef SDL_AUDIO_DRIVER_SNDIO
+#undef SDL_AUDIO_DRIVER_SNDIO_DYNAMIC
 #undef SDL_AUDIO_DRIVER_OSS
 #undef SDL_AUDIO_DRIVER_OSS_SOUNDCARD_H
 #undef SDL_AUDIO_DRIVER_PAUDIO
--- a/src/audio/SDL_audio.c	Sun Jul 07 02:04:19 2013 -0400
+++ b/src/audio/SDL_audio.c	Sun Jul 07 02:03:07 2013 -0400
@@ -67,6 +67,7 @@
 extern AudioBootStrap FUSIONSOUND_bootstrap;
 extern AudioBootStrap ANDROIDAUD_bootstrap;
 extern AudioBootStrap PSPAUD_bootstrap;
+extern AudioBootStrap SNDIO_bootstrap;
 
 /* Available audio drivers */
 static const AudioBootStrap *const bootstrap[] = {
@@ -76,6 +77,9 @@
 #if SDL_AUDIO_DRIVER_ALSA
     &ALSA_bootstrap,
 #endif
+#if SDL_AUDIO_DRIVER_SNDIO
+    &SNDIO_bootstrap,
+#endif
 #if SDL_AUDIO_DRIVER_BSD
     &BSD_AUDIO_bootstrap,
 #endif
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/audio/sndio/SDL_sndioaudio.c	Sun Jul 07 02:03:07 2013 -0400
@@ -0,0 +1,327 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "SDL_config.h"
+
+#if SDL_AUDIO_DRIVER_SNDIO
+
+/* OpenBSD sndio target */
+
+#if HAVE_STDIO_H
+#include <stdio.h>
+#endif
+
+#ifdef HAVE_SIGNAL_H
+#include <signal.h>
+#endif
+
+#include <unistd.h>
+
+#include "SDL_audio.h"
+#include "../SDL_audiomem.h"
+#include "../SDL_audio_c.h"
+#include "SDL_sndioaudio.h"
+
+#ifdef SDL_AUDIO_DRIVER_SNDIO_DYNAMIC
+#include "SDL_loadso.h"
+#endif
+
+static struct sio_hdl * (*SNDIO_sio_open)(const char *, unsigned int, int);
+static void (*SNDIO_sio_close)(struct sio_hdl *);
+static int (*SNDIO_sio_setpar)(struct sio_hdl *, struct sio_par *);
+static int (*SNDIO_sio_getpar)(struct sio_hdl *, struct sio_par *);
+static int (*SNDIO_sio_start)(struct sio_hdl *);
+static int (*SNDIO_sio_stop)(struct sio_hdl *);
+static size_t (*SNDIO_sio_read)(struct sio_hdl *, void *, size_t);
+static size_t (*SNDIO_sio_write)(struct sio_hdl *, const void *, size_t);
+static void (*SNDIO_sio_initpar)(struct sio_par *);
+
+#ifdef SDL_AUDIO_DRIVER_SNDIO_DYNAMIC
+static const char *sndio_library = SDL_AUDIO_DRIVER_SNDIO_DYNAMIC;
+static void *sndio_handle = NULL;
+
+static int
+load_sndio_sym(const char *fn, void **addr)
+{
+    *addr = SDL_LoadFunction(sndio_handle, fn);
+    if (*addr == NULL) {
+        /* Don't call SDL_SetError(): SDL_LoadFunction already did. */
+        return 0;
+    }
+
+    return 1;
+}
+
+/* cast funcs to char* first, to please GCC's strict aliasing rules. */
+#define SDL_SNDIO_SYM(x) \
+    if (!load_sndio_sym(#x, (void **) (char *) &SNDIO_##x)) return -1
+#else
+#define SDL_SNDIO_SYM(x) SNDIO_##x = x
+#endif
+
+static int
+load_sndio_syms(void)
+{
+    SDL_SNDIO_SYM(sio_open);
+    SDL_SNDIO_SYM(sio_close);
+    SDL_SNDIO_SYM(sio_setpar);
+    SDL_SNDIO_SYM(sio_getpar);
+    SDL_SNDIO_SYM(sio_start);
+    SDL_SNDIO_SYM(sio_stop);
+    SDL_SNDIO_SYM(sio_read);
+    SDL_SNDIO_SYM(sio_write);
+    SDL_SNDIO_SYM(sio_initpar);
+    return 0;
+}
+
+#undef SDL_SNDIO_SYM
+
+#ifdef SDL_AUDIO_DRIVER_SNDIO_DYNAMIC
+
+static void
+UnloadSNDIOLibrary(void)
+{
+    if (sndio_handle != NULL) {
+        SDL_UnloadObject(sndio_handle);
+        sndio_handle = NULL;
+    }
+}
+
+static int
+LoadSNDIOLibrary(void)
+{
+    int retval = 0;
+    if (sndio_handle == NULL) {
+        sndio_handle = SDL_LoadObject(sndio_library);
+        if (sndio_handle == NULL) {
+            retval = -1;
+            /* Don't call SDL_SetError(): SDL_LoadObject already did. */
+        } else {
+            retval = load_sndio_syms();
+            if (retval < 0) {
+                UnloadSNDIOLibrary();
+            }
+        }
+    }
+    return retval;
+}
+
+#else
+
+static void
+UnloadSNDIOLibrary(void)
+{
+}
+
+static int
+LoadSNDIOLibrary(void)
+{
+    load_sndio_syms();
+    return 0;
+}
+
+#endif /* SDL_AUDIO_DRIVER_SNDIO_DYNAMIC */
+
+
+
+
+static void
+SNDIO_WaitDevice(_THIS)
+{
+    /* no-op; sio_write() blocks if necessary. */
+}
+
+static void
+SNDIO_PlayDevice(_THIS)
+{
+    const int written = sio_write(this->hidden->dev, this->hidden->mixbuf, this->hidden->mixlen);
+
+    /* If we couldn't write, assume fatal error for now */
+    if ( written == 0 ) {
+        this->enabled = 0;
+    }
+#ifdef DEBUG_AUDIO
+    fprintf(stderr, "Wrote %d bytes of audio data\n", written);
+#endif
+}
+
+static Uint8 *
+SNDIO_GetDeviceBuf(_THIS)
+{
+    return this->hidden->mixbuf;
+}
+
+static void
+SNDIO_WaitDone(_THIS)
+{
+    sio_stop(this->hidden->dev);
+}
+
+static void
+SNDIO_CloseDevice(_THIS)
+{
+    if (this->hidden != NULL) {
+        if (this->hidden->mixbuf != NULL) {
+            SDL_FreeAudioMem(this->hidden->mixbuf);
+            this->hidden->mixbuf = NULL;
+        }
+        if ( this->hidden->dev != NULL ) {
+            sio_close(this->hidden->dev);
+            this->hidden->dev = NULL;
+        }
+        SDL_free(this->hidden);
+        this->hidden = NULL;
+    }
+}
+
+static int
+SNDIO_OpenDevice(_THIS, const char *devname, int iscapture)
+{
+    SDL_AudioFormat test_format = SDL_FirstAudioFormat(this->spec.format);
+    struct sio_par par;
+    int status;
+
+    this->hidden = (struct SDL_PrivateAudioData *)
+        SDL_malloc(sizeof(*this->hidden));
+    if (this->hidden == NULL) {
+        return SDL_OutOfMemory();
+    }
+    SDL_memset(this->hidden, 0, sizeof(*this->hidden));
+
+    this->hidden->mixlen = this->spec.size;
+
+    /* !!! FIXME: SIO_DEVANY can be a specific device... */
+    if ((this->hidden->dev = sio_open(0 /*SIO_DEVANY*/, SIO_PLAY, 0)) == NULL) {
+        SNDIO_CloseDevice(this);
+        return SDL_SetError("sio_open() failed");
+    }
+
+    sio_initpar(&par);
+
+    par.rate = this->spec.freq;
+    par.pchan = this->spec.channels;
+    par.round = this->spec.samples;
+    par.appbufsz = par.round * 2;
+
+    /* Try for a closest match on audio format */
+    status = -1;
+    while (test_format && (status < 0)) {
+        if (!SDL_AUDIO_ISFLOAT(test_format)) {
+            par.le = SDL_AUDIO_ISLITTLEENDIAN(test_format) ? 1 : 0;
+            par.sig = SDL_AUDIO_ISSIGNED(test_format) ? 1 : 0;
+            par.bits = SDL_AUDIO_BITSIZE(test_format);
+
+            if (sio_setpar(this->hidden->dev, &par) == 1) {
+                status = 0;
+                break;
+            }
+        }
+        test_format = SDL_NextAudioFormat();
+    }
+
+    if (status < 0) {
+        SNDIO_CloseDevice(this);
+        return SDL_SetError("sndio: Couldn't find any hardware audio formats");
+    }
+
+    if (sio_getpar(this->hidden->dev, &par) == 0) {
+        SNDIO_CloseDevice(this);
+        return SDL_SetError("sio_getpar() failed");
+    }
+
+    if ((par.bits == 32) && (par.sig) && (par.le))
+        this->spec.format = AUDIO_S32LSB;
+    else if ((par.bits == 32) && (par.sig) && (!par.le))
+        this->spec.format = AUDIO_S32MSB;
+    else if ((par.bits == 16) && (par.sig) && (par.le))
+        this->spec.format = AUDIO_S16LSB;
+    else if ((par.bits == 16) && (par.sig) && (!par.le))
+        this->spec.format = AUDIO_S16MSB;
+    else if ((par.bits == 16) && (!par.sig) && (par.le))
+        this->spec.format = AUDIO_U16LSB;
+    else if ((par.bits == 16) && (!par.sig) && (!par.le))
+        this->spec.format = AUDIO_U16MSB;
+    else if ((par.bits == 8) && (par.sig))
+        this->spec.format = AUDIO_S8;
+    else if ((par.bits == 8) && (!par.sig))
+        this->spec.format = AUDIO_U8;
+    else {
+        SNDIO_CloseDevice(this);
+        return SDL_SetError("sndio: Got unsupported hardware audio format.");
+    }
+
+    this->spec.freq = par.rate;
+    this->spec.channels = par.pchan;
+    this->spec.samples = par.round;
+
+    /* Calculate the final parameters for this audio specification */
+    SDL_CalculateAudioSpec(&this->spec);
+
+    /* Allocate mixing buffer */
+    this->hidden->mixlen = this->spec.size;
+    this->hidden->mixbuf = (Uint8 *) SDL_AllocAudioMem(this->hidden->mixlen);
+    if (this->hidden->mixbuf == NULL) {
+        SNDIO_CloseDevice(this);
+        return SDL_OutOfMemory();
+    }
+    SDL_memset(this->hidden->mixbuf, this->spec.silence, this->hidden->mixlen);
+
+    if (!sio_start(this->hidden->dev)) {
+        return SDL_SetError("sio_start() failed");
+    }
+
+    /* We're ready to rock and roll. :-) */
+    return 0;
+}
+
+static void
+SNDIO_Deinitialize(void)
+{
+    UnloadSNDIOLibrary();
+}
+
+static int
+SNDIO_Init(SDL_AudioDriverImpl * impl)
+{
+    if (LoadSNDIOLibrary() < 0) {
+        return 0;
+    }
+
+    /* Set the function pointers */
+    impl->OpenDevice = SNDIO_OpenDevice;
+    impl->WaitDevice = SNDIO_WaitDevice;
+    impl->PlayDevice = SNDIO_PlayDevice;
+    impl->GetDeviceBuf = SNDIO_GetDeviceBuf;
+    impl->WaitDone = SNDIO_WaitDone;
+    impl->CloseDevice = SNDIO_CloseDevice;
+    impl->Deinitialize = SNDIO_Deinitialize;
+    impl->OnlyHasDefaultOutputDevice = 1;  /* !!! FIXME: sndio can handle multiple devices. */
+
+    return 1;   /* this audio target is available. */
+}
+
+AudioBootStrap SNDIO_bootstrap = {
+    "sndio", "OpenBSD sndio", SNDIO_Init, 0
+};
+
+#endif /* SDL_AUDIO_DRIVER_SNDIO */
+
+/* vi: set ts=4 sw=4 expandtab: */
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/audio/sndio/SDL_sndioaudio.h	Sun Jul 07 02:03:07 2013 -0400
@@ -0,0 +1,45 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_config.h"
+
+#ifndef _SDL_sndioaudio_h
+#define _SDL_sndioaudio_h
+
+#include <sndio.h>
+
+#include "../SDL_sysaudio.h"
+
+/* Hidden "this" pointer for the audio functions */
+#define _THIS   SDL_AudioDevice *this
+
+struct SDL_PrivateAudioData
+{
+    /* The audio device handle */
+    struct sio_hdl *dev;
+
+    /* Raw mixing buffer */
+    Uint8 *mixbuf;
+    int mixlen;
+};
+
+#endif /* _SDL_sndioaudio_h */
+
+/* vi: set ts=4 sw=4 expandtab: */