cleanup init functions of audio

- use SDL_bool if possible
- assume NULL/SDL_FALSE filled impl
- skip zfill of current_audio at the beginning of SDL_AudioInit (done before the init() calls)

src/audio/SDL_audio.c

@@ -943,15 +943,14 @@ SDL_GetAudioDriver(int index)
 int
 SDL_AudioInit(const char *driver_name)
 {
-    int i = 0;
+    int i;
-    int initialized = 0;
+    SDL_bool initialized = SDL_FALSE, tried_to_init = SDL_FALSE;
-    int tried_to_init = 0;
 
     if (SDL_GetCurrentAudioDriver()) {
         SDL_AudioQuit();        /* shutdown driver if already running. */
     }
 
-    SDL_zero(current_audio);
+    // SDL_zero(current_audio); -- no need at this point, done before init()
     SDL_zeroa(open_devices);
 
     /* Select the proper audio driver */
@@ -977,7 +976,7 @@ SDL_AudioInit(const char *driver_name)
             for (i = 0; bootstrap[i]; ++i) {
                 if ((driver_attempt_len == SDL_strlen(bootstrap[i]->name)) &&
                     (SDL_strncasecmp(bootstrap[i]->name, driver_attempt, driver_attempt_len) == 0)) {
-                    tried_to_init = 1;
+                    tried_to_init = SDL_TRUE;
                     SDL_zero(current_audio);
                     current_audio.name = bootstrap[i]->name;
                     current_audio.desc = bootstrap[i]->desc;
@@ -994,7 +993,7 @@ SDL_AudioInit(const char *driver_name)
                 continue;
             }
 
-            tried_to_init = 1;
+            tried_to_init = SDL_TRUE;
             SDL_zero(current_audio);
             current_audio.name = bootstrap[i]->name;
             current_audio.desc = bootstrap[i]->desc;

src/audio/SDL_sysaudio.h

@@ -84,12 +84,11 @@ typedef struct SDL_AudioDriverImpl
     /* !!! FIXME: add pause(), so we can optimize instead of mixing silence. */
 
     /* Some flags to push duplicate code into the core and reduce #ifdefs. */
-    /* !!! FIXME: these should be SDL_bool */
+    SDL_bool ProvidesOwnCallbackThread;
-    int ProvidesOwnCallbackThread;
+    SDL_bool HasCaptureSupport;
-    int HasCaptureSupport;
+    SDL_bool OnlyHasDefaultOutputDevice;
-    int OnlyHasDefaultOutputDevice;
+    SDL_bool OnlyHasDefaultCaptureDevice;
-    int OnlyHasDefaultCaptureDevice;
+    SDL_bool AllowsArbitraryDeviceNames;
-    int AllowsArbitraryDeviceNames;
 } SDL_AudioDriverImpl;
 
 
@@ -177,8 +176,8 @@ typedef struct AudioBootStrap
 {
     const char *name;
     const char *desc;
-    int (*init) (SDL_AudioDriverImpl * impl);
+    SDL_bool (*init) (SDL_AudioDriverImpl * impl);
-    int demand_only;  /* 1==request explicitly, or it won't be available. */
+    SDL_bool demand_only;  /* 1==request explicitly, or it won't be available. */
 } AudioBootStrap;
 
 /* Not all of these are available in a given build. Use #ifdefs, etc. */

src/audio/aaudio/SDL_aaudio.c

@@ -268,7 +268,7 @@ aaudio_Deinitialize(void)
     LOGI("End AAUDIO %s", SDL_GetError());
 }
 
-static int
+static SDL_bool
 aaudio_Init(SDL_AudioDriverImpl *impl)
 {
     aaudio_result_t res;
@@ -280,7 +280,7 @@ aaudio_Init(SDL_AudioDriverImpl *impl)
      * See https://github.com/google/oboe/issues/40 for more information.
      */
     if (SDL_GetAndroidSDKVersion() < 27) {
-        return 0;
+        return SDL_FALSE;
     }
 
     SDL_zero(ctx);
@@ -315,12 +315,12 @@ aaudio_Init(SDL_AudioDriverImpl *impl)
 
     /* and the capabilities */
     impl->HasCaptureSupport = SDL_TRUE;
-    impl->OnlyHasDefaultOutputDevice = 1;
+    impl->OnlyHasDefaultOutputDevice = SDL_TRUE;
-    impl->OnlyHasDefaultCaptureDevice = 1;
+    impl->OnlyHasDefaultCaptureDevice = SDL_TRUE;
 
     /* this audio target is available. */
     LOGI("SDL aaudio_Init OK");
-    return 1;
+    return SDL_TRUE;
 
 failure:
     if (ctx.handle) {
@@ -331,11 +331,11 @@ failure:
     }
     ctx.handle = NULL;
     ctx.builder = NULL;
-    return 0;
+    return SDL_FALSE;
 }
 
 AudioBootStrap aaudio_bootstrap = {
-    "AAudio", "AAudio audio driver", aaudio_Init, 0
+    "AAudio", "AAudio audio driver", aaudio_Init, SDL_FALSE
 };
 
 /* Pause (block) all non already paused audio devices by taking their mixer lock */

src/audio/alsa/SDL_alsa_audio.c

@@ -997,11 +997,11 @@ ALSA_Deinitialize(void)
     UnloadALSALibrary();
 }
 
-static int
+static SDL_bool
 ALSA_Init(SDL_AudioDriverImpl * impl)
 {
     if (LoadALSALibrary() < 0) {
-        return 0;
+        return SDL_FALSE;
     }
 
     /* Set the function pointers */
@@ -1017,12 +1017,12 @@ ALSA_Init(SDL_AudioDriverImpl * impl)
 
     impl->HasCaptureSupport = SDL_TRUE;
 
-    return 1;   /* this audio target is available. */
+    return SDL_TRUE;   /* this audio target is available. */
 }
 
 
 AudioBootStrap ALSA_bootstrap = {
-    "alsa", "ALSA PCM audio", ALSA_Init, 0
+    "alsa", "ALSA PCM audio", ALSA_Init, SDL_FALSE
 };
 
 #endif /* SDL_AUDIO_DRIVER_ALSA */

src/audio/android/SDL_androidaudio.c

@@ -120,7 +120,7 @@ ANDROIDAUDIO_CloseDevice(_THIS)
     SDL_free(this->hidden);
 }
 
-static int
+static SDL_bool
 ANDROIDAUDIO_Init(SDL_AudioDriverImpl * impl)
 {
     /* Set the function pointers */
@@ -133,14 +133,14 @@ ANDROIDAUDIO_Init(SDL_AudioDriverImpl * impl)
 
     /* and the capabilities */
     impl->HasCaptureSupport = SDL_TRUE;
-    impl->OnlyHasDefaultOutputDevice = 1;
+    impl->OnlyHasDefaultOutputDevice = SDL_TRUE;
-    impl->OnlyHasDefaultCaptureDevice = 1;
+    impl->OnlyHasDefaultCaptureDevice = SDL_TRUE;
 
-    return 1;   /* this audio target is available. */
+    return SDL_TRUE;   /* this audio target is available. */
 }
 
 AudioBootStrap ANDROIDAUDIO_bootstrap = {
-    "android", "SDL Android audio driver", ANDROIDAUDIO_Init, 0
+    "android", "SDL Android audio driver", ANDROIDAUDIO_Init, SDL_FALSE
 };
 
 /* Pause (block) all non already paused audio devices by taking their mixer lock */

src/audio/arts/SDL_artsaudio.c

@@ -320,16 +320,16 @@ ARTS_Deinitialize(void)
 }
 
 
-static int
+static SDL_bool
 ARTS_Init(SDL_AudioDriverImpl * impl)
 {
     if (LoadARTSLibrary() < 0) {
-        return 0;
+        return SDL_FALSE;
     } else {
         if (SDL_NAME(arts_init) () != 0) {
             UnloadARTSLibrary();
             SDL_SetError("ARTS: arts_init failed (no audio server?)");
-            return 0;
+            return SDL_FALSE;
         }
 
         /* Play a stream so aRts doesn't crash */
@@ -350,14 +350,14 @@ ARTS_Init(SDL_AudioDriverImpl * impl)
     impl->GetDeviceBuf = ARTS_GetDeviceBuf;
     impl->CloseDevice = ARTS_CloseDevice;
     impl->Deinitialize = ARTS_Deinitialize;
-    impl->OnlyHasDefaultOutputDevice = 1;
+    impl->OnlyHasDefaultOutputDevice = SDL_TRUE;
 
-    return 1;   /* this audio target is available. */
+    return SDL_TRUE;   /* this audio target is available. */
 }
 
 
 AudioBootStrap ARTS_bootstrap = {
-    "arts", "Analog RealTime Synthesizer", ARTS_Init, 0
+    "arts", "Analog RealTime Synthesizer", ARTS_Init, SDL_FALSE
 };
 
 #endif /* SDL_AUDIO_DRIVER_ARTS */

src/audio/coreaudio/SDL_coreaudio.m

@@ -1152,7 +1152,7 @@ COREAUDIO_Deinitialize(void)
 #endif
 }
 
-static int
+static SDL_bool
 COREAUDIO_Init(SDL_AudioDriverImpl * impl)
 {
     /* Set the function pointers */
@@ -1164,18 +1164,18 @@ COREAUDIO_Init(SDL_AudioDriverImpl * impl)
     impl->DetectDevices = COREAUDIO_DetectDevices;
     AudioObjectAddPropertyListener(kAudioObjectSystemObject, &devlist_address, device_list_changed, NULL);
 #else
-    impl->OnlyHasDefaultOutputDevice = 1;
+    impl->OnlyHasDefaultOutputDevice = SDL_TRUE;
-    impl->OnlyHasDefaultCaptureDevice = 1;
+    impl->OnlyHasDefaultCaptureDevice = SDL_TRUE;
 #endif
 
-    impl->ProvidesOwnCallbackThread = 1;
+    impl->ProvidesOwnCallbackThread = SDL_TRUE;
-    impl->HasCaptureSupport = 1;
+    impl->HasCaptureSupport = SDL_TRUE;
 
-    return 1;   /* this audio target is available. */
+    return SDL_TRUE;   /* this audio target is available. */
 }
 
 AudioBootStrap COREAUDIO_bootstrap = {
-    "coreaudio", "CoreAudio", COREAUDIO_Init, 0
+    "coreaudio", "CoreAudio", COREAUDIO_Init, SDL_FALSE
 };
 
 #endif /* SDL_AUDIO_DRIVER_COREAUDIO */

src/audio/directsound/SDL_directsound.c

@@ -575,11 +575,11 @@ DSOUND_Deinitialize(void)
 }
 
 
-static int
+static SDL_bool
 DSOUND_Init(SDL_AudioDriverImpl * impl)
 {
     if (!DSOUND_Load()) {
-        return 0;
+        return SDL_FALSE;
     }
 
     /* Set the function pointers */
@@ -596,11 +596,11 @@ DSOUND_Init(SDL_AudioDriverImpl * impl)
 
     impl->HasCaptureSupport = SDL_TRUE;
 
-    return 1;   /* this audio target is available. */
+    return SDL_TRUE;   /* this audio target is available. */
 }
 
 AudioBootStrap DSOUND_bootstrap = {
-    "directsound", "DirectSound", DSOUND_Init, 0
+    "directsound", "DirectSound", DSOUND_Init, SDL_FALSE
 };
 
 #endif /* SDL_AUDIO_DRIVER_DSOUND */

src/audio/disk/SDL_diskaudio.c

@@ -177,7 +177,7 @@ DISKAUDIO_DetectDevices(void)
     SDL_AddAudioDevice(SDL_TRUE, DEFAULT_INPUT_DEVNAME, NULL, (void *) 0x2);
 }
 
-static int
+static SDL_bool
 DISKAUDIO_Init(SDL_AudioDriverImpl * impl)
 {
     /* Set the function pointers */
@@ -191,14 +191,14 @@ DISKAUDIO_Init(SDL_AudioDriverImpl * impl)
     impl->CloseDevice = DISKAUDIO_CloseDevice;
     impl->DetectDevices = DISKAUDIO_DetectDevices;
 
-    impl->AllowsArbitraryDeviceNames = 1;
+    impl->AllowsArbitraryDeviceNames = SDL_TRUE;
     impl->HasCaptureSupport = SDL_TRUE;
 
-    return 1;   /* this audio target is available. */
+    return SDL_TRUE;   /* this audio target is available. */
 }
 
 AudioBootStrap DISKAUDIO_bootstrap = {
-    "disk", "direct-to-disk audio", DISKAUDIO_Init, 1
+    "disk", "direct-to-disk audio", DISKAUDIO_Init, SDL_TRUE
 };
 
 #endif /* SDL_AUDIO_DRIVER_DISK */

src/audio/dsp/SDL_dspaudio.c

@@ -301,13 +301,13 @@ look_for_devices_test(int fd)
     return 0;
 }
 
-static int
+static SDL_bool
 DSP_Init(SDL_AudioDriverImpl * impl)
 {
     InitTimeDevicesExist = SDL_FALSE;
     SDL_EnumUnixAudioDevices(0, look_for_devices_test);
     if (!InitTimeDevicesExist) {
-        return 0;  /* maybe try a different backend. */
+        return SDL_FALSE;  /* maybe try a different backend. */
     }
 
     /* Set the function pointers */
@@ -319,15 +319,15 @@ DSP_Init(SDL_AudioDriverImpl * impl)
     impl->CaptureFromDevice = DSP_CaptureFromDevice;
     impl->FlushCapture = DSP_FlushCapture;
 
-    impl->AllowsArbitraryDeviceNames = 1;
+    impl->AllowsArbitraryDeviceNames = SDL_TRUE;
     impl->HasCaptureSupport = SDL_TRUE;
 
-    return 1;   /* this audio target is available. */
+    return SDL_TRUE;   /* this audio target is available. */
 }
 
 
 AudioBootStrap DSP_bootstrap = {
-    "dsp", "OSS /dev/dsp standard audio", DSP_Init, 0
+    "dsp", "OSS /dev/dsp standard audio", DSP_Init, SDL_FALSE
 };
 
 #endif /* SDL_AUDIO_DRIVER_OSS */

src/audio/dummy/SDL_dummyaudio.c

@@ -45,22 +45,22 @@ DUMMYAUDIO_CaptureFromDevice(_THIS, void *buffer, int buflen)
     return buflen;
 }
 
-static int
+static SDL_bool
 DUMMYAUDIO_Init(SDL_AudioDriverImpl * impl)
 {
     /* Set the function pointers */
     impl->OpenDevice = DUMMYAUDIO_OpenDevice;
     impl->CaptureFromDevice = DUMMYAUDIO_CaptureFromDevice;
 
-    impl->OnlyHasDefaultOutputDevice = 1;
+    impl->OnlyHasDefaultOutputDevice = SDL_TRUE;
-    impl->OnlyHasDefaultCaptureDevice = 1;
+    impl->OnlyHasDefaultCaptureDevice = SDL_TRUE;
     impl->HasCaptureSupport = SDL_TRUE;
 
-    return 1;   /* this audio target is available. */
+    return SDL_TRUE;   /* this audio target is available. */
 }
 
 AudioBootStrap DUMMYAUDIO_bootstrap = {
-    "dummy", "SDL dummy audio driver", DUMMYAUDIO_Init, 1
+    "dummy", "SDL dummy audio driver", DUMMYAUDIO_Init, SDL_TRUE
 };
 
 /* vi: set ts=4 sw=4 expandtab: */

src/audio/emscripten/SDL_emscriptenaudio.c

@@ -344,30 +344,29 @@ EMSCRIPTENAUDIO_LockOrUnlockDeviceWithNoMixerLock(SDL_AudioDevice * device)
 {
 }
 
-static int
+static SDL_bool
 EMSCRIPTENAUDIO_Init(SDL_AudioDriverImpl * impl)
 {
-    int available;
+    SDL_bool available, capture_available;
-    int capture_available;
 
     /* Set the function pointers */
     impl->OpenDevice = EMSCRIPTENAUDIO_OpenDevice;
     impl->CloseDevice = EMSCRIPTENAUDIO_CloseDevice;
 
-    impl->OnlyHasDefaultOutputDevice = 1;
+    impl->OnlyHasDefaultOutputDevice = SDL_TRUE;
 
     /* no threads here */
     impl->LockDevice = impl->UnlockDevice = EMSCRIPTENAUDIO_LockOrUnlockDeviceWithNoMixerLock;
-    impl->ProvidesOwnCallbackThread = 1;
+    impl->ProvidesOwnCallbackThread = SDL_TRUE;
 
     /* check availability */
     available = EM_ASM_INT_V({
         if (typeof(AudioContext) !== 'undefined') {
-            return 1;
+            return SDL_TRUE;
         } else if (typeof(webkitAudioContext) !== 'undefined') {
-            return 1;
+            return SDL_TRUE;
         }
-        return 0;
+        return SDL_FALSE;
     });
 
     if (!available) {
@@ -376,11 +375,11 @@ EMSCRIPTENAUDIO_Init(SDL_AudioDriverImpl * impl)
 
     capture_available = available && EM_ASM_INT_V({
         if ((typeof(navigator.mediaDevices) !== 'undefined') && (typeof(navigator.mediaDevices.getUserMedia) !== 'undefined')) {
-            return 1;
+            return SDL_TRUE;
         } else if (typeof(navigator.webkitGetUserMedia) !== 'undefined') {
-            return 1;
+            return SDL_TRUE;
         }
-        return 0;
+        return SDL_FALSE;
     });
 
     impl->HasCaptureSupport = capture_available ? SDL_TRUE : SDL_FALSE;
@@ -390,7 +389,7 @@ EMSCRIPTENAUDIO_Init(SDL_AudioDriverImpl * impl)
 }
 
 AudioBootStrap EMSCRIPTENAUDIO_bootstrap = {
-    "emscripten", "SDL emscripten audio driver", EMSCRIPTENAUDIO_Init, 0
+    "emscripten", "SDL emscripten audio driver", EMSCRIPTENAUDIO_Init, SDL_FALSE
 };
 
 #endif /* SDL_AUDIO_DRIVER_EMSCRIPTEN */

src/audio/esd/SDL_esdaudio.c

@@ -293,11 +293,11 @@ ESD_Deinitialize(void)
     UnloadESDLibrary();
 }
 
-static int
+static SDL_bool
 ESD_Init(SDL_AudioDriverImpl * impl)
 {
     if (LoadESDLibrary() < 0) {
-        return 0;
+        return SDL_FALSE;
     } else {
         int connection = 0;
 
@@ -308,7 +308,7 @@ ESD_Init(SDL_AudioDriverImpl * impl)
         if (connection < 0) {
             UnloadESDLibrary();
             SDL_SetError("ESD: esd_open_sound failed (no audio server?)");
-            return 0;
+            return SDL_FALSE;
         }
         SDL_NAME(esd_close) (connection);
     }
@@ -320,14 +320,14 @@ ESD_Init(SDL_AudioDriverImpl * impl)
     impl->GetDeviceBuf = ESD_GetDeviceBuf;
     impl->CloseDevice = ESD_CloseDevice;
     impl->Deinitialize = ESD_Deinitialize;
-    impl->OnlyHasDefaultOutputDevice = 1;
+    impl->OnlyHasDefaultOutputDevice = SDL_TRUE;
 
-    return 1;   /* this audio target is available. */
+    return SDL_TRUE;   /* this audio target is available. */
 }
 
 
 AudioBootStrap ESD_bootstrap = {
-    "esd", "Enlightened Sound Daemon", ESD_Init, 0
+    "esd", "Enlightened Sound Daemon", ESD_Init, SDL_FALSE
 };
 
 #endif /* SDL_AUDIO_DRIVER_ESD */

src/audio/fusionsound/SDL_fsaudio.c

@@ -288,11 +288,11 @@ SDL_FS_Deinitialize(void)
 }
 
 
-static int
+static SDL_bool
 SDL_FS_Init(SDL_AudioDriverImpl * impl)
 {
     if (LoadFusionSoundLibrary() < 0) {
-        return 0;
+        return SDL_FALSE;
     } else {
         DirectResult ret;
 
@@ -302,7 +302,7 @@ SDL_FS_Init(SDL_AudioDriverImpl * impl)
             SDL_SetError
                 ("FusionSound: SDL_FS_init failed (FusionSoundInit: %d)",
                  ret);
-            return 0;
+            return SDL_FALSE;
         }
     }
 
@@ -313,14 +313,14 @@ SDL_FS_Init(SDL_AudioDriverImpl * impl)
     impl->GetDeviceBuf = SDL_FS_GetDeviceBuf;
     impl->CloseDevice = SDL_FS_CloseDevice;
     impl->Deinitialize = SDL_FS_Deinitialize;
-    impl->OnlyHasDefaultOutputDevice = 1;
+    impl->OnlyHasDefaultOutputDevice = SDL_TRUE;
 
-    return 1;   /* this audio target is available. */
+    return SDL_TRUE;   /* this audio target is available. */
 }
 
 
 AudioBootStrap FUSIONSOUND_bootstrap = {
-    "fusionsound", "FusionSound", SDL_FS_Init, 0
+    "fusionsound", "FusionSound", SDL_FS_Init, SDL_FALSE
 };
 
 #endif /* SDL_AUDIO_DRIVER_FUSIONSOUND */

src/audio/haiku/SDL_haikuaudio.cc

@@ -216,22 +216,22 @@ HAIKUAUDIO_Deinitialize(void)
     SDL_QuitBeApp();
 }
 
-static int
+static SDL_bool
 HAIKUAUDIO_Init(SDL_AudioDriverImpl * impl)
 {
     /* Initialize the Be Application, if it's not already started */
     if (SDL_InitBeApp() < 0) {
-        return 0;
+        return SDL_FALSE;
     }
 
     /* Set the function pointers */
     impl->OpenDevice = HAIKUAUDIO_OpenDevice;
     impl->CloseDevice = HAIKUAUDIO_CloseDevice;
     impl->Deinitialize = HAIKUAUDIO_Deinitialize;
-    impl->ProvidesOwnCallbackThread = 1;
+    impl->ProvidesOwnCallbackThread = SDL_TRUE;
-    impl->OnlyHasDefaultOutputDevice = 1;
+    impl->OnlyHasDefaultOutputDevice = SDL_TRUE;
 
-    return 1;   /* this audio target is available. */
+    return SDL_TRUE;   /* this audio target is available. */
 }
 
 extern "C"
@@ -239,7 +239,7 @@ extern "C"
     extern AudioBootStrap HAIKUAUDIO_bootstrap;
 }
 AudioBootStrap HAIKUAUDIO_bootstrap = {
-    "haiku", "Haiku BSoundPlayer", HAIKUAUDIO_Init, 0
+    "haiku", "Haiku BSoundPlayer", HAIKUAUDIO_Init, SDL_FALSE
 };
 
 #endif /* SDL_AUDIO_DRIVER_HAIKU */

src/audio/jack/SDL_jackaudio.c

@@ -405,18 +405,18 @@ JACK_Deinitialize(void)
     UnloadJackLibrary();
 }
 
-static int
+static SDL_bool
 JACK_Init(SDL_AudioDriverImpl * impl)
 {
     if (LoadJackLibrary() < 0) {
-        return 0;
+        return SDL_FALSE;
     } else {
         /* Make sure a JACK server is running and available. */
         jack_status_t status;
         jack_client_t *client = JACK_jack_client_open("SDL", JackNoStartServer, &status, NULL);
         if (client == NULL) {
             UnloadJackLibrary();
-            return 0;
+            return SDL_FALSE;
         }
         JACK_jack_client_close(client);
     }
@@ -433,11 +433,11 @@ JACK_Init(SDL_AudioDriverImpl * impl)
     impl->OnlyHasDefaultCaptureDevice = SDL_TRUE;
     impl->HasCaptureSupport = SDL_TRUE;
 
-    return 1;   /* this audio target is available. */
+    return SDL_TRUE;   /* this audio target is available. */
 }
 
 AudioBootStrap JACK_bootstrap = {
-    "jack", "JACK Audio Connection Kit", JACK_Init, 0
+    "jack", "JACK Audio Connection Kit", JACK_Init, SDL_FALSE
 };
 
 #endif /* SDL_AUDIO_DRIVER_JACK */

src/audio/nacl/SDL_naclaudio.c

@@ -133,18 +133,18 @@ NACLAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture) {
     return 0;
 }
 
-static int
+static SDL_bool
 NACLAUDIO_Init(SDL_AudioDriverImpl * impl)
 {
     if (PSGetInstanceId() == 0) {
-        return 0;
+        return SDL_FALSE;
     }
     
     /* Set the function pointers */
     impl->OpenDevice = NACLAUDIO_OpenDevice;
     impl->CloseDevice = NACLAUDIO_CloseDevice;
-    impl->OnlyHasDefaultOutputDevice = 1;
+    impl->OnlyHasDefaultOutputDevice = SDL_TRUE;
-    impl->ProvidesOwnCallbackThread = 1;
+    impl->ProvidesOwnCallbackThread = SDL_TRUE;
     /*
      *    impl->WaitDevice = NACLAUDIO_WaitDevice;
      *    impl->GetDeviceBuf = NACLAUDIO_GetDeviceBuf;
@@ -152,12 +152,12 @@ NACLAUDIO_Init(SDL_AudioDriverImpl * impl)
      *    impl->Deinitialize = NACLAUDIO_Deinitialize;
      */
     
-    return 1;
+    return SDL_TRUE;
 }
 
 AudioBootStrap NACLAUDIO_bootstrap = {
     NACLAUDIO_DRIVER_NAME, "SDL NaCl Audio Driver",
-    NACLAUDIO_Init, 0
+    NACLAUDIO_Init, SDL_FALSE
 };
 
 #endif /* SDL_AUDIO_DRIVER_NACL */

src/audio/nas/SDL_nasaudio.c

@@ -423,16 +423,16 @@ NAS_Deinitialize(void)
     UnloadNASLibrary();
 }
 
-static int
+static SDL_bool
 NAS_Init(SDL_AudioDriverImpl * impl)
 {
     if (LoadNASLibrary() < 0) {
-        return 0;
+        return SDL_FALSE;
     } else {
         AuServer *aud = NAS_AuOpenServer("", 0, NULL, 0, NULL, NULL);
         if (aud == NULL) {
             SDL_SetError("NAS: AuOpenServer() failed (no audio server?)");
-            return 0;
+            return SDL_FALSE;
         }
         NAS_AuCloseServer(aud);
     }
@@ -447,15 +447,15 @@ NAS_Init(SDL_AudioDriverImpl * impl)
     impl->CloseDevice = NAS_CloseDevice;
     impl->Deinitialize = NAS_Deinitialize;
 
-    impl->OnlyHasDefaultOutputDevice = 1;
+    impl->OnlyHasDefaultOutputDevice = SDL_TRUE;
-    impl->OnlyHasDefaultCaptureDevice = 1;
+    impl->OnlyHasDefaultCaptureDevice = SDL_TRUE;
     impl->HasCaptureSupport = SDL_TRUE;
 
-    return 1;   /* this audio target is available. */
+    return SDL_TRUE;   /* this audio target is available. */
 }
 
 AudioBootStrap NAS_bootstrap = {
-    "nas", "Network Audio System", NAS_Init, 0
+    "nas", "Network Audio System", NAS_Init, SDL_FALSE
 };
 
 #endif /* SDL_AUDIO_DRIVER_NAS */

src/audio/netbsd/SDL_netbsdaudio.c

@@ -326,7 +326,7 @@ NETBSDAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
     return 0;
 }
 
-static int
+static SDL_bool
 NETBSDAUDIO_Init(SDL_AudioDriverImpl * impl)
 {
     /* Set the function pointers */
@@ -339,14 +339,14 @@ NETBSDAUDIO_Init(SDL_AudioDriverImpl * impl)
     impl->FlushCapture = NETBSDAUDIO_FlushCapture;
 
     impl->HasCaptureSupport = SDL_TRUE;
-    impl->AllowsArbitraryDeviceNames = 1;
+    impl->AllowsArbitraryDeviceNames = SDL_TRUE;
 
-    return 1;   /* this audio target is available. */
+    return SDL_TRUE;   /* this audio target is available. */
 }
 
 
 AudioBootStrap NETBSDAUDIO_bootstrap = {
-    "netbsd", "NetBSD audio", NETBSDAUDIO_Init, 0
+    "netbsd", "NetBSD audio", NETBSDAUDIO_Init, SDL_FALSE
 };
 
 #endif /* SDL_AUDIO_DRIVER_NETBSD */

src/audio/openslES/SDL_openslES.c

@@ -714,13 +714,13 @@ openslES_CloseDevice(_THIS)
     SDL_free(this->hidden);
 }
 
-static int
+static SDL_bool
 openslES_Init(SDL_AudioDriverImpl * impl)
 {
     LOGI("openslES_Init() called");
 
     if (!openslES_CreateEngine()) {
-        return 0;
+        return SDL_FALSE;
     }
 
     LOGI("openslES_Init() - set pointers");
@@ -736,18 +736,18 @@ openslES_Init(SDL_AudioDriverImpl * impl)
     impl->Deinitialize  = openslES_DestroyEngine;
 
     /* and the capabilities */
-    impl->HasCaptureSupport = 1;
+    impl->HasCaptureSupport = SDL_TRUE;
-    impl->OnlyHasDefaultOutputDevice = 1;
+    impl->OnlyHasDefaultOutputDevice = SDL_TRUE;
-    impl->OnlyHasDefaultCaptureDevice = 1;
+    impl->OnlyHasDefaultCaptureDevice = SDL_TRUE;
 
     LOGI("openslES_Init() - success");
 
     /* this audio target is available. */
-    return 1;
+    return SDL_TRUE;
 }
 
 AudioBootStrap openslES_bootstrap = {
-    "openslES", "opensl ES audio driver", openslES_Init, 0
+    "openslES", "opensl ES audio driver", openslES_Init, SDL_FALSE
 };
 
 void openslES_ResumeDevices(void)

src/audio/os2/SDL_os2audio.c

@@ -423,7 +423,7 @@ static int OS2_OpenDevice(_THIS, void *handle, const char *devname,
 }
 
 
-static int OS2_Init(SDL_AudioDriverImpl * impl)
+static SDL_bool OS2_Init(SDL_AudioDriverImpl * impl)
 {
     /* Set the function pointers */
     impl->DetectDevices = OS2_DetectDevices;
@@ -438,12 +438,12 @@ static int OS2_Init(SDL_AudioDriverImpl * impl)
     impl->FlushCapture = ;
     impl->HasCaptureSupport = SDL_TRUE;
     */
-    return 1; /* this audio target is available. */
+    return SDL_TRUE; /* this audio target is available. */
 }
 
 
 AudioBootStrap OS2AUDIO_bootstrap = {
-    "DART", "OS/2 DART", OS2_Init, 0
+    "DART", "OS/2 DART", OS2_Init, SDL_FALSE
 };
 
 #endif /* SDL_AUDIO_DRIVER_OS2 */

src/audio/paudio/SDL_paudio.c

@@ -485,14 +485,14 @@ PAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
     return 0;
 }
 
-static int
+static SDL_bool
 PAUDIO_Init(SDL_AudioDriverImpl * impl)
 {
     /* !!! FIXME: not right for device enum? */
     int fd = OpenAudioPath(NULL, 0, OPEN_FLAGS, 0);
     if (fd < 0) {
         SDL_SetError("PAUDIO: Couldn't open audio device");
-        return 0;
+        return SDL_FALSE;
     }
     close(fd);
 
@@ -502,13 +502,13 @@ PAUDIO_Init(SDL_AudioDriverImpl * impl)
     impl->PlayDevice = PAUDIO_WaitDevice;
     impl->GetDeviceBuf = PAUDIO_GetDeviceBuf;
     impl->CloseDevice = PAUDIO_CloseDevice;
-    impl->OnlyHasDefaultOutputDevice = 1;       /* !!! FIXME: add device enum! */
+    impl->OnlyHasDefaultOutputDevice = SDL_TRUE;       /* !!! FIXME: add device enum! */
 
-    return 1;   /* this audio target is available. */
+    return SDL_TRUE;   /* this audio target is available. */
 }
 
 AudioBootStrap PAUDIO_bootstrap = {
-    "paud", "AIX Paudio", PAUDIO_Init, 0
+    "paud", "AIX Paudio", PAUDIO_Init, SDL_FALSE
 };
 
 #endif /* SDL_AUDIO_DRIVER_PAUDIO */

src/audio/pipewire/SDL_pipewire.c

@@ -1223,19 +1223,19 @@ PIPEWIRE_Deinitialize()
     }
 }
 
-static int
+static SDL_bool
 PIPEWIRE_Init(SDL_AudioDriverImpl *impl)
 {
     if (!pipewire_initialized) {
         if (init_pipewire_library() < 0) {
-            return 0;
+            return SDL_FALSE;
         }
 
         pipewire_initialized = SDL_TRUE;
 
         if (hotplug_loop_init() < 0) {
             PIPEWIRE_Deinitialize();
-            return 0;
+            return SDL_FALSE;
         }
     }
 
@@ -1245,13 +1245,13 @@ PIPEWIRE_Init(SDL_AudioDriverImpl *impl)
     impl->CloseDevice   = PIPEWIRE_CloseDevice;
     impl->Deinitialize  = PIPEWIRE_Deinitialize;
 
-    impl->HasCaptureSupport         = 1;
+    impl->HasCaptureSupport         = SDL_TRUE;
-    impl->ProvidesOwnCallbackThread = 1;
+    impl->ProvidesOwnCallbackThread = SDL_TRUE;
 
-    return 1;
+    return SDL_TRUE;
 }
 
-AudioBootStrap PIPEWIRE_bootstrap = { "pipewire", "Pipewire", PIPEWIRE_Init, 0 };
+AudioBootStrap PIPEWIRE_bootstrap = { "pipewire", "Pipewire", PIPEWIRE_Init, SDL_FALSE };
 
 #endif /* SDL_AUDIO_DRIVER_PIPEWIRE */
 

src/audio/psp/SDL_pspaudio.c

@@ -158,7 +158,7 @@ static void PSPAUDIO_ThreadInit(_THIS)
     }
 }
 
-static int
+static SDL_bool
 PSPAUDIO_Init(SDL_AudioDriverImpl * impl)
 {
     /* Set the function pointers */
@@ -170,16 +170,16 @@ PSPAUDIO_Init(SDL_AudioDriverImpl * impl)
     impl->ThreadInit = PSPAUDIO_ThreadInit;
 
     /* PSP audio device */
-    impl->OnlyHasDefaultOutputDevice = 1;
+    impl->OnlyHasDefaultOutputDevice = SDL_TRUE;
     /*
-    impl->HasCaptureSupport = 1;
+    impl->HasCaptureSupport = SDL_TRUE;
-    impl->OnlyHasDefaultCaptureDevice = 1;
+    impl->OnlyHasDefaultCaptureDevice = SDL_TRUE;
     */
-    return 1;   /* this audio target is available. */
+    return SDL_TRUE;   /* this audio target is available. */
 }
 
 AudioBootStrap PSPAUDIO_bootstrap = {
-    "psp", "PSP audio driver", PSPAUDIO_Init, 0
+    "psp", "PSP audio driver", PSPAUDIO_Init, SDL_FALSE
 };
 
 #endif /* SDL_AUDIO_DRIVER_PSP */

src/audio/pulseaudio/SDL_pulseaudio.c

@@ -832,16 +832,16 @@ PULSEAUDIO_Deinitialize(void)
     UnloadPulseAudioLibrary();
 }
 
-static int
+static SDL_bool
 PULSEAUDIO_Init(SDL_AudioDriverImpl * impl)
 {
     if (LoadPulseAudioLibrary() < 0) {
-        return 0;
+        return SDL_FALSE;
     }
 
     if (ConnectToPulseServer(&hotplug_mainloop, &hotplug_context) < 0) {
         UnloadPulseAudioLibrary();
-        return 0;
+        return SDL_FALSE;
     }
 
     include_monitors = SDL_GetHintBoolean(SDL_HINT_AUDIO_INCLUDE_MONITORS, SDL_FALSE);
@@ -859,11 +859,11 @@ PULSEAUDIO_Init(SDL_AudioDriverImpl * impl)
 
     impl->HasCaptureSupport = SDL_TRUE;
 
-    return 1;   /* this audio target is available. */
+    return SDL_TRUE;   /* this audio target is available. */
 }
 
 AudioBootStrap PULSEAUDIO_bootstrap = {
-    "pulseaudio", "PulseAudio", PULSEAUDIO_Init, 0
+    "pulseaudio", "PulseAudio", PULSEAUDIO_Init, SDL_FALSE
 };
 
 #endif /* SDL_AUDIO_DRIVER_PULSEAUDIO */

src/audio/qsa/SDL_qsa_audio.c

@@ -635,7 +635,7 @@ QSA_Deinitialize(void)
     qsa_capture_devices = 0;
 }
 
-static int
+static SDL_bool
 QSA_Init(SDL_AudioDriverImpl * impl)
 {
     /* Clear devices array */
@@ -655,19 +655,14 @@ QSA_Init(SDL_AudioDriverImpl * impl)
     impl->GetDeviceBuf = QSA_GetDeviceBuf;
     impl->CloseDevice = QSA_CloseDevice;
     impl->Deinitialize = QSA_Deinitialize;
-    impl->LockDevice = NULL;
-    impl->UnlockDevice = NULL;
 
-    impl->ProvidesOwnCallbackThread = 0;
+    impl->HasCaptureSupport = SDL_TRUE;
-    impl->HasCaptureSupport = 1;
-    impl->OnlyHasDefaultOutputDevice = 0;
-    impl->OnlyHasDefaultCaptureDevice = 0;
 
-    return 1;   /* this audio target is available. */
+    return SDL_TRUE;   /* this audio target is available. */
 }
 
 AudioBootStrap QSAAUDIO_bootstrap = {
-    "qsa", "QNX QSA Audio", QSA_Init, 0
+    "qsa", "QNX QSA Audio", QSA_Init, SDL_FALSE
 };
 
 #endif /* SDL_AUDIO_DRIVER_QSA */

src/audio/sndio/SDL_sndioaudio.c

@@ -357,11 +357,11 @@ SNDIO_DetectDevices(void)
 	SDL_AddAudioDevice(SDL_TRUE, DEFAULT_INPUT_DEVNAME, NULL, (void *) 0x2);
 }
 
-static int
+static SDL_bool
 SNDIO_Init(SDL_AudioDriverImpl * impl)
 {
     if (LoadSNDIOLibrary() < 0) {
-        return 0;
+        return SDL_FALSE;
     }
 
     /* Set the function pointers */
@@ -375,14 +375,14 @@ SNDIO_Init(SDL_AudioDriverImpl * impl)
     impl->Deinitialize = SNDIO_Deinitialize;
     impl->DetectDevices = SNDIO_DetectDevices;
 
-    impl->AllowsArbitraryDeviceNames = 1;
+    impl->AllowsArbitraryDeviceNames = SDL_TRUE;
     impl->HasCaptureSupport = SDL_TRUE;
 
-    return 1;   /* this audio target is available. */
+    return SDL_TRUE;   /* this audio target is available. */
 }
 
 AudioBootStrap SNDIO_bootstrap = {
-    "sndio", "OpenBSD sndio", SNDIO_Init, 0
+    "sndio", "OpenBSD sndio", SNDIO_Init, SDL_FALSE
 };
 
 #endif /* SDL_AUDIO_DRIVER_SNDIO */

src/audio/sun/SDL_sunaudio.c

@@ -394,7 +394,7 @@ snd2au(int sample)
     return (mask & sample);
 }
 
-static int
+static SDL_bool
 SUNAUDIO_Init(SDL_AudioDriverImpl * impl)
 {
     /* Set the function pointers */
@@ -405,13 +405,13 @@ SUNAUDIO_Init(SDL_AudioDriverImpl * impl)
     impl->GetDeviceBuf = SUNAUDIO_GetDeviceBuf;
     impl->CloseDevice = SUNAUDIO_CloseDevice;
 
-    impl->AllowsArbitraryDeviceNames = 1;
+    impl->AllowsArbitraryDeviceNames = SDL_TRUE;
 
-    return 1; /* this audio target is available. */
+    return SDL_TRUE; /* this audio target is available. */
 }
 
 AudioBootStrap SUNAUDIO_bootstrap = {
-    "audio", "UNIX /dev/audio interface", SUNAUDIO_Init, 0
+    "audio", "UNIX /dev/audio interface", SUNAUDIO_Init, SDL_FALSE
 };
 
 #endif /* SDL_AUDIO_DRIVER_SUNAUDIO */

src/audio/vita/SDL_vitaaudio.c

@@ -154,7 +154,7 @@ static void VITAAUD_ThreadInit(_THIS)
     }
 }
 
-static int
+static SDL_bool
 VITAAUD_Init(SDL_AudioDriverImpl * impl)
 {
     /* Set the function pointers */
@@ -166,16 +166,16 @@ VITAAUD_Init(SDL_AudioDriverImpl * impl)
     impl->ThreadInit = VITAAUD_ThreadInit;
 
     /* VITA audio device */
-    impl->OnlyHasDefaultOutputDevice = 1;
+    impl->OnlyHasDefaultOutputDevice = SDL_TRUE;
     /*
-    impl->HasCaptureSupport = 1;
+    impl->HasCaptureSupport = SDL_TRUE;
-    impl->OnlyHasDefaultInputDevice = 1;
+    impl->OnlyHasDefaultInputDevice = SDL_TRUE;
     */
-    return 1;   /* this audio target is available. */
+    return SDL_TRUE;   /* this audio target is available. */
 }
 
 AudioBootStrap VITAAUD_bootstrap = {
-    "vita", "VITA audio driver", VITAAUD_Init, 0
+    "vita", "VITA audio driver", VITAAUD_Init, SDL_FALSE
 };
 
 #endif /* SDL_AUDIO_DRIVER_VITA */

src/audio/wasapi/SDL_wasapi.c

@@ -713,14 +713,14 @@ WASAPI_Deinitialize(void)
     deviceid_list = NULL;
 }
 
-static int
+static SDL_bool
 WASAPI_Init(SDL_AudioDriverImpl * impl)
 {
     SDL_AtomicSet(&WASAPI_DefaultPlaybackGeneration, 1);
     SDL_AtomicSet(&WASAPI_DefaultCaptureGeneration, 1);
 
     if (WASAPI_PlatformInit() == -1) {
-        return 0;
+        return SDL_FALSE;
     }
 
     /* Set the function pointers */
@@ -736,13 +736,13 @@ WASAPI_Init(SDL_AudioDriverImpl * impl)
     impl->FlushCapture = WASAPI_FlushCapture;
     impl->CloseDevice = WASAPI_CloseDevice;
     impl->Deinitialize = WASAPI_Deinitialize;
-    impl->HasCaptureSupport = 1;
+    impl->HasCaptureSupport = SDL_TRUE;
 
-    return 1;   /* this audio target is available. */
+    return SDL_TRUE;   /* this audio target is available. */
 }
 
 AudioBootStrap WASAPI_bootstrap = {
-    "wasapi", "WASAPI", WASAPI_Init, 0
+    "wasapi", "WASAPI", WASAPI_Init, SDL_FALSE
 };
 
 #endif  /* SDL_AUDIO_DRIVER_WASAPI */

src/audio/winmm/SDL_winmm.c

@@ -434,7 +434,7 @@ WINMM_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
     return 0;                   /* Ready to go! */
 }
 
-static int
+static SDL_bool
 WINMM_Init(SDL_AudioDriverImpl * impl)
 {
     /* Set the function pointers */
@@ -449,11 +449,11 @@ WINMM_Init(SDL_AudioDriverImpl * impl)
 
     impl->HasCaptureSupport = SDL_TRUE;
 
-    return 1;   /* this audio target is available. */
+    return SDL_TRUE;   /* this audio target is available. */
 }
 
 AudioBootStrap WINMM_bootstrap = {
-    "winmm", "Windows Waveform Audio", WINMM_Init, 0
+    "winmm", "Windows Waveform Audio", WINMM_Init, SDL_FALSE
 };
 
 #endif /* SDL_AUDIO_DRIVER_WINMM */