Use #ifdef/#ifndef instead of #if defined/#if \!defined

src/audio/SDL_audio.c

@@ -646,7 +646,7 @@ static int SDLCALL SDL_RunAudio(void *devicep)
 
     SDL_assert(!device->iscapture);
 
-#if defined(SDL_AUDIO_DRIVER_ANDROID)
+#ifdef SDL_AUDIO_DRIVER_ANDROID
     {
         /* Set thread priority to THREAD_PRIORITY_AUDIO */
         Android_JNI_AudioSetThreadPriority(device->iscapture, device->id);
@@ -746,7 +746,7 @@ static int SDLCALL SDL_CaptureAudio(void *devicep)
 
     SDL_assert(device->iscapture);
 
-#if defined(SDL_AUDIO_DRIVER_ANDROID)
+#ifdef SDL_AUDIO_DRIVER_ANDROID
     {
         /* Set thread priority to THREAD_PRIORITY_AUDIO */
         Android_JNI_AudioSetThreadPriority(device->iscapture, device->id);

src/audio/SDL_audiocvt.c

@@ -144,7 +144,7 @@ static int SDL_ConvertAudio(SDL_AudioCVT * cvt);
  * 8 channels (7.1) layout: FL+FR+FC+LFE+BL+BR+SL+SR
  */
 
-#if defined(SDL_SSE3_INTRINSICS)
+#ifdef SDL_SSE3_INTRINSICS
 /* Convert from stereo to mono. Average left and right. */
 static void SDLCALL SDL_TARGETING("sse3") SDL_ConvertStereoToMono_SSE3(SDL_AudioCVT *cvt, SDL_AudioFormat format)
 {
@@ -181,7 +181,7 @@ static void SDLCALL SDL_TARGETING("sse3") SDL_ConvertStereoToMono_SSE3(SDL_Audio
 }
 #endif
 
-#if defined(SDL_SSE_INTRINSICS)
+#ifdef SDL_SSE_INTRINSICS
 /* Convert from mono to stereo. Duplicate to stereo left and right. */
 static void SDLCALL SDL_TARGETING("sse") SDL_ConvertMonoToStereo_SSE(SDL_AudioCVT *cvt, SDL_AudioFormat format)
 {
@@ -834,7 +834,7 @@ static int SDL_BuildAudioCVT(SDL_AudioCVT *cvt,
         /* swap in some SIMD versions for a few of these. */
         if (channel_converter == SDL_ConvertStereoToMono) {
             SDL_AudioFilter filter = NULL;
-#if defined(SDL_SSE3_INTRINSICS)
+#ifdef SDL_SSE3_INTRINSICS
             if (!filter && SDL_HasSSE3()) {
                 filter = SDL_ConvertStereoToMono_SSE3;
             }
@@ -844,7 +844,7 @@ static int SDL_BuildAudioCVT(SDL_AudioCVT *cvt,
             }
         } else if (channel_converter == SDL_ConvertMonoToStereo) {
             SDL_AudioFilter filter = NULL;
-#if defined(SDL_SSE_INTRINSICS)
+#ifdef SDL_SSE_INTRINSICS
             if (!filter && SDL_HasSSE()) {
                 filter = SDL_ConvertMonoToStereo_SSE;
             }

src/audio/SDL_audiotypecvt.c

@@ -226,7 +226,7 @@ static void SDLCALL SDL_Convert_F32_to_S32_Scalar(SDL_AudioCVT *cvt, SDL_AudioFo
 }
 #endif
 
-#if defined(SDL_SSE2_INTRINSICS)
+#ifdef SDL_SSE2_INTRINSICS
 static void SDLCALL SDL_TARGETING("sse2") SDL_Convert_S8_to_F32_SSE2(SDL_AudioCVT *cvt, SDL_AudioFormat format)
 {
     const Sint8 *src = ((const Sint8 *)(cvt->buf + cvt->len_cvt)) - 1;
@@ -1175,7 +1175,7 @@ void SDL_ChooseAudioConverters(void)
     SDL_Convert_F32_to_S32 = SDL_Convert_F32_to_S32_##fntype; \
     converters_chosen = SDL_TRUE
 
-#if defined(SDL_SSE2_INTRINSICS)
+#ifdef SDL_SSE2_INTRINSICS
     if (SDL_HasSSE2()) {
         SET_CONVERTER_FUNCS(SSE2);
         return;

src/audio/coreaudio/SDL_coreaudio.h

@@ -25,7 +25,7 @@
 
 #include "../SDL_sysaudio.h"
 
-#if !defined(__IOS__)
+#ifndef __IOS__
 #define MACOSX_COREAUDIO
 #endif
 

src/audio/coreaudio/SDL_coreaudio.m

@@ -891,7 +891,7 @@ static int prepare_audioqueue(_THIS)
 
     /* Make sure we can feed the device a minimum amount of time */
     MINIMUM_AUDIO_BUFFER_TIME_MS = 15.0;
-#if defined(__IOS__)
+#ifdef __IOS__
     if (floor(NSFoundationVersionNumber) <= NSFoundationVersionNumber_iOS_7_1) {
         /* Older iOS hardware, use 40 ms as a minimum time */
         MINIMUM_AUDIO_BUFFER_TIME_MS = 40.0;

src/audio/directsound/SDL_directsound.c

@@ -186,14 +186,14 @@ static BOOL CALLBACK FindAllDevs(LPGUID guid, LPCWSTR desc, LPCWSTR module, LPVO
 
 static void DSOUND_DetectDevices(void)
 {
-#if defined(HAVE_MMDEVICEAPI_H)
+#ifdef HAVE_MMDEVICEAPI_H
     if (SupportsIMMDevice) {
         SDL_IMMDevice_EnumerateEndpoints(SDL_TRUE);
     } else {
 #endif /* HAVE_MMDEVICEAPI_H */
         pDirectSoundCaptureEnumerateW(FindAllDevs, (void *)((size_t)1));
         pDirectSoundEnumerateW(FindAllDevs, (void *)((size_t)0));
-#if defined(HAVE_MMDEVICEAPI_H)
+#ifdef HAVE_MMDEVICEAPI_H
     }
 #endif /* HAVE_MMDEVICEAPI_H*/
 }
@@ -609,7 +609,7 @@ static int DSOUND_OpenDevice(_THIS, const char *devname)
 
 static void DSOUND_Deinitialize(void)
 {
-#if defined(HAVE_MMDEVICEAPI_H)
+#ifdef HAVE_MMDEVICEAPI_H
     if (SupportsIMMDevice) {
         SDL_IMMDevice_Quit();
         SupportsIMMDevice = SDL_FALSE;
@@ -624,7 +624,7 @@ static SDL_bool DSOUND_Init(SDL_AudioDriverImpl *impl)
         return SDL_FALSE;
     }
 
-#if defined(HAVE_MMDEVICEAPI_H)
+#ifdef HAVE_MMDEVICEAPI_H
     SupportsIMMDevice = !(SDL_IMMDevice_Init() < 0);
 #endif /* HAVE_MMDEVICEAPI_H */
 

src/audio/netbsd/SDL_netbsdaudio.c

@@ -20,7 +20,7 @@
 */
 #include "SDL_internal.h"
 
-#if defined(SDL_AUDIO_DRIVER_NETBSD)
+#ifdef SDL_AUDIO_DRIVER_NETBSD
 
 /*
  * Driver for native NetBSD audio(4).