diff --git a/src/external/mini_al.h b/src/external/mini_al.h
index 558fc9aa8..18dd3b40c 100644
--- a/src/external/mini_al.h
+++ b/src/external/mini_al.h
@@ -1525,6 +1525,52 @@ void mal_pcm_convert(void* pOut, mal_format formatOut, const void* pIn, mal_form
#endif
+// Check if we have the necessary development packages for each backend at the top so we can use this to determine whether or not
+// certain unused functions and variables can be excluded from the build to avoid warnings.
+#ifdef MAL_ENABLE_WASAPI
+ #define MAL_HAS_WASAPI
+ #ifdef __has_include
+ #if !__has_include(<audioclient.h>)
+ #undef MAL_HAS_WASAPI
+ #endif
+ #endif
+#endif
+#ifdef MAL_ENABLE_DSOUND
+ #define MAL_HAS_DSOUND
+ #ifdef __has_include
+ #if !__has_include(<dsound.h>)
+ #undef MAL_HAS_DSOUND
+ #endif
+ #endif
+#endif
+#ifdef MAL_ENABLE_WINMM
+ #define MAL_HAS_WINMM // Every compiler I'm aware of supports WinMM.
+#endif
+#ifdef MAL_ENABLE_ALSA
+ #define MAL_HAS_ALSA
+ #ifdef __has_include
+ #if !__has_include(<alsa/asoundlib.h>)
+ #undef MAL_HAS_ALSA
+ #endif
+ #endif
+#endif
+#ifdef MAL_ENABLE_COREAUDIO
+ #define MAL_HAS_COREAUDIO
+#endif
+#ifdef MAL_ENABLE_OSS
+ #define MAL_HAS_OSS // OSS is the only supported backend for Unix and BSD, so it must be present else this library is useless.
+#endif
+#ifdef MAL_ENABLE_OPENSL
+ #define MAL_HAS_OPENSL // Like OSS, OpenSL is the only supported backend for Android. It must be present.
+#endif
+#ifdef MAL_ENABLE_OPENAL
+ #define MAL_HAS_OPENAL // mini_al inlines the necessary OpenAL stuff.
+#endif
+#ifdef MAL_ENABLE_NULL
+ #define MAL_HAS_NULL // Everything supports the null backend.
+#endif
+
+
#ifdef MAL_WIN32
#define MAL_THREADCALL WINAPI
typedef unsigned long mal_thread_result;
@@ -2534,7 +2580,7 @@ static inline mal_uint32 mal_device__get_state(mal_device* pDevice)
#ifdef MAL_WIN32
- #if !defined(MAL_NO_WASAPI) || !defined(MAL_NO_DSOUND)
+ #if defined(MAL_HAS_WASAPI) || defined(MAL_HAS_DSOUND)
static GUID MAL_GUID_KSDATAFORMAT_SUBTYPE_PCM = {0x00000001, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}};
static GUID MAL_GUID_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT = {0x00000003, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}};
//static GUID MAL_GUID_KSDATAFORMAT_SUBTYPE_ALAW = {0x00000006, 0x0000, 0x0010, {0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}};
@@ -2549,7 +2595,7 @@ static inline mal_uint32 mal_device__get_state(mal_device* pDevice)
// Null Backend
//
///////////////////////////////////////////////////////////////////////////////
-#ifdef MAL_ENABLE_NULL
+#ifdef MAL_HAS_NULL
mal_result mal_context_init__null(mal_context* pContext)
{
mal_assert(pContext != NULL);
@@ -2777,7 +2823,7 @@ static mal_result mal_device__main_loop__null(mal_device* pDevice)
#endif
#endif
-#if defined(MAL_ENABLE_WASAPI) || defined(MAL_ENABLE_DSOUND)
+#if defined(MAL_HAS_WASAPI) || defined(MAL_HAS_DSOUND)
#include <mmreg.h>
#ifndef SPEAKER_FRONT_LEFT
@@ -2916,7 +2962,7 @@ static void mal_channel_mask_to_channel_map__win32(DWORD dwChannelMask, mal_uint
// WASAPI Backend
//
///////////////////////////////////////////////////////////////////////////////
-#ifdef MAL_ENABLE_WASAPI
+#ifdef MAL_HAS_WASAPI
#if defined(_MSC_VER)
#pragma warning(push)
#pragma warning(disable:4091) // 'typedef ': ignored on left of '' when no variable is declared
@@ -3863,7 +3909,7 @@ static mal_result mal_device__main_loop__wasapi(mal_device* pDevice)
// DirectSound Backend
//
///////////////////////////////////////////////////////////////////////////////
-#ifdef MAL_ENABLE_DSOUND
+#ifdef MAL_HAS_DSOUND
#include <dsound.h>
#if 0 // MAL_GUID_NULL is not currently used, but leaving it here in case I need to add it back again.
@@ -4467,7 +4513,7 @@ static mal_result mal_device__main_loop__dsound(mal_device* pDevice)
// WinMM Backend
//
///////////////////////////////////////////////////////////////////////////////
-#ifdef MAL_ENABLE_WINMM
+#ifdef MAL_HAS_WINMM
#include <mmsystem.h>
#if !defined(MAXULONG_PTR)
@@ -5207,7 +5253,7 @@ static mal_result mal_device__main_loop__winmm(mal_device* pDevice)
// ALSA Backend
//
///////////////////////////////////////////////////////////////////////////////
-#ifdef MAL_ENABLE_ALSA
+#ifdef MAL_HAS_ALSA
#include <alsa/asoundlib.h>
typedef int (* mal_snd_pcm_open_proc) (snd_pcm_t **pcm, const char *name, snd_pcm_stream_t stream, int mode);
@@ -6338,7 +6384,7 @@ static mal_result mal_device__main_loop__alsa(mal_device* pDevice)
// OSS Backend
//
///////////////////////////////////////////////////////////////////////////////
-#ifdef MAL_ENABLE_OSS
+#ifdef MAL_HAS_OSS
#include <sys/ioctl.h>
#include <unistd.h>
#include <fcntl.h>
@@ -6686,7 +6732,7 @@ static mal_result mal_device__main_loop__oss(mal_device* pDevice)
// OpenSL|ES Backend
//
///////////////////////////////////////////////////////////////////////////////
-#ifdef MAL_ENABLE_OPENSL
+#ifdef MAL_HAS_OPENSL
#include <SLES/OpenSLES.h>
#ifdef MAL_ANDROID
#include <SLES/OpenSLES_Android.h>
@@ -7389,7 +7435,7 @@ static mal_result mal_device__stop_backend__opensl(mal_device* pDevice)
// OpenAL Backend
//
///////////////////////////////////////////////////////////////////////////////
-#ifdef MAL_ENABLE_OPENAL
+#ifdef MAL_HAS_OPENAL
#ifdef MAL_WIN32
#define MAL_AL_APIENTRY __cdecl
#else
@@ -8129,37 +8175,37 @@ static mal_result mal_device__start_backend(mal_device* pDevice)
mal_assert(pDevice != NULL);
mal_result result = MAL_NO_BACKEND;
-#ifdef MAL_ENABLE_WASAPI
+#ifdef MAL_HAS_WASAPI
if (pDevice->pContext->backend == mal_backend_wasapi) {
result = mal_device__start_backend__wasapi(pDevice);
}
#endif
-#ifdef MAL_ENABLE_DSOUND
+#ifdef MAL_HAS_DSOUND
if (pDevice->pContext->backend == mal_backend_dsound) {
result = mal_device__start_backend__dsound(pDevice);
}
#endif
-#ifdef MAL_ENABLE_WINMM
+#ifdef MAL_HAS_WINMM
if (pDevice->pContext->backend == mal_backend_winmm) {
result = mal_device__start_backend__winmm(pDevice);
}
#endif
-#ifdef MAL_ENABLE_ALSA
+#ifdef MAL_HAS_ALSA
if (pDevice->pContext->backend == mal_backend_alsa) {
result = mal_device__start_backend__alsa(pDevice);
}
#endif
-#ifdef MAL_ENABLE_OSS
+#ifdef MAL_HAS_OSS
if (pDevice->pContext->backend == mal_backend_oss) {
result = mal_device__start_backend__oss(pDevice);
}
#endif
-#ifdef MAL_ENABLE_OPENAL
+#ifdef MAL_HAS_OPENAL
if (pDevice->pContext->backend == mal_backend_openal) {
result = mal_device__start_backend__openal(pDevice);
}
#endif
-#ifdef MAL_ENABLE_NULL
+#ifdef MAL_HAS_NULL
if (pDevice->pContext->backend == mal_backend_null) {
result = mal_device__start_backend__null(pDevice);
}
@@ -8173,37 +8219,37 @@ static mal_result mal_device__stop_backend(mal_device* pDevice)
mal_assert(pDevice != NULL);
mal_result result = MAL_NO_BACKEND;
-#ifdef MAL_ENABLE_WASAPI
+#ifdef MAL_HAS_WASAPI
if (pDevice->pContext->backend == mal_backend_wasapi) {
result = mal_device__stop_backend__wasapi(pDevice);
}
#endif
-#ifdef MAL_ENABLE_DSOUND
+#ifdef MAL_HAS_DSOUND
if (pDevice->pContext->backend == mal_backend_dsound) {
result = mal_device__stop_backend__dsound(pDevice);
}
#endif
-#ifdef MAL_ENABLE_WINMM
+#ifdef MAL_HAS_WINMM
if (pDevice->pContext->backend == mal_backend_winmm) {
result = mal_device__stop_backend__winmm(pDevice);
}
#endif
-#ifdef MAL_ENABLE_ALSA
+#ifdef MAL_HAS_ALSA
if (pDevice->pContext->backend == mal_backend_alsa) {
result = mal_device__stop_backend__alsa(pDevice);
}
#endif
-#ifdef MAL_ENABLE_OSS
+#ifdef MAL_HAS_OSS
if (pDevice->pContext->backend == mal_backend_oss) {
result = mal_device__stop_backend__oss(pDevice);
}
#endif
-#ifdef MAL_ENABLE_OPENAL
+#ifdef MAL_HAS_OPENAL
if (pDevice->pContext->backend == mal_backend_openal) {
result = mal_device__stop_backend__openal(pDevice);
}
#endif
-#ifdef MAL_ENABLE_NULL
+#ifdef MAL_HAS_NULL
if (pDevice->pContext->backend == mal_backend_null) {
result = mal_device__stop_backend__null(pDevice);
}
@@ -8217,37 +8263,37 @@ static mal_result mal_device__break_main_loop(mal_device* pDevice)
mal_assert(pDevice != NULL);
mal_result result = MAL_NO_BACKEND;
-#ifdef MAL_ENABLE_WASAPI
+#ifdef MAL_HAS_WASAPI
if (pDevice->pContext->backend == mal_backend_wasapi) {
result = mal_device__break_main_loop__wasapi(pDevice);
}
#endif
-#ifdef MAL_ENABLE_DSOUND
+#ifdef MAL_HAS_DSOUND
if (pDevice->pContext->backend == mal_backend_dsound) {
result = mal_device__break_main_loop__dsound(pDevice);
}
#endif
-#ifdef MAL_ENABLE_WINMM
+#ifdef MAL_HAS_WINMM
if (pDevice->pContext->backend == mal_backend_winmm) {
result = mal_device__break_main_loop__winmm(pDevice);
}
#endif
-#ifdef MAL_ENABLE_ALSA
+#ifdef MAL_HAS_ALSA
if (pDevice->pContext->backend == mal_backend_alsa) {
result = mal_device__break_main_loop__alsa(pDevice);
}
#endif
-#ifdef MAL_ENABLE_OSS
+#ifdef MAL_HAS_OSS
if (pDevice->pContext->backend == mal_backend_oss) {
result = mal_device__break_main_loop__oss(pDevice);
}
#endif
-#ifdef MAL_ENABLE_OPENAL
+#ifdef MAL_HAS_OPENAL
if (pDevice->pContext->backend == mal_backend_openal) {
result = mal_device__break_main_loop__openal(pDevice);
}
#endif
-#ifdef MAL_ENABLE_NULL
+#ifdef MAL_HAS_NULL
if (pDevice->pContext->backend == mal_backend_null) {
result = mal_device__break_main_loop__null(pDevice);
}
@@ -8261,37 +8307,37 @@ static mal_result mal_device__main_loop(mal_device* pDevice)
mal_assert(pDevice != NULL);
mal_result result = MAL_NO_BACKEND;
-#ifdef MAL_ENABLE_WASAPI
+#ifdef MAL_HAS_WASAPI
if (pDevice->pContext->backend == mal_backend_wasapi) {
result = mal_device__main_loop__wasapi(pDevice);
}
#endif
-#ifdef MAL_ENABLE_DSOUND
+#ifdef MAL_HAS_DSOUND
if (pDevice->pContext->backend == mal_backend_dsound) {
result = mal_device__main_loop__dsound(pDevice);
}
#endif
-#ifdef MAL_ENABLE_WINMM
+#ifdef MAL_HAS_WINMM
if (pDevice->pContext->backend == mal_backend_winmm) {
result = mal_device__main_loop__winmm(pDevice);
}
#endif
-#ifdef MAL_ENABLE_ALSA
+#ifdef MAL_HAS_ALSA
if (pDevice->pContext->backend == mal_backend_alsa) {
result = mal_device__main_loop__alsa(pDevice);
}
#endif
-#ifdef MAL_ENABLE_OSS
+#ifdef MAL_HAS_OSS
if (pDevice->pContext->backend == mal_backend_oss) {
result = mal_device__main_loop__oss(pDevice);
}
#endif
-#ifdef MAL_ENABLE_OPENAL
+#ifdef MAL_HAS_OPENAL
if (pDevice->pContext->backend == mal_backend_openal) {
result = mal_device__main_loop__openal(pDevice);
}
#endif
-#ifdef MAL_ENABLE_NULL
+#ifdef MAL_HAS_NULL
if (pDevice->pContext->backend == mal_backend_null) {
result = mal_device__main_loop__null(pDevice);
}
@@ -8527,49 +8573,49 @@ mal_result mal_context_init(mal_backend backends[], mal_uint32 backendCount, con
result = MAL_NO_BACKEND;
switch (backend) {
- #ifdef MAL_ENABLE_WASAPI
+ #ifdef MAL_HAS_WASAPI
case mal_backend_wasapi:
{
result = mal_context_init__wasapi(pContext);
} break;
#endif
- #ifdef MAL_ENABLE_DSOUND
+ #ifdef MAL_HAS_DSOUND
case mal_backend_dsound:
{
result = mal_context_init__dsound(pContext);
} break;
#endif
- #ifdef MAL_ENABLE_WINMM
+ #ifdef MAL_HAS_WINMM
case mal_backend_winmm:
{
result = mal_context_init__winmm(pContext);
} break;
#endif
- #ifdef MAL_ENABLE_ALSA
+ #ifdef MAL_HAS_ALSA
case mal_backend_alsa:
{
result = mal_context_init__alsa(pContext);
} break;
#endif
- #ifdef MAL_ENABLE_OSS
+ #ifdef MAL_HAS_OSS
case mal_backend_oss:
{
result = mal_context_init__oss(pContext);
} break;
#endif
- #ifdef MAL_ENABLE_OPENSL
+ #ifdef MAL_HAS_OPENSL
case mal_backend_opensl:
{
result = mal_context_init__opensl(pContext);
} break;
#endif
- #ifdef MAL_ENABLE_OPENAL
+ #ifdef MAL_HAS_OPENAL
case mal_backend_openal:
{
result = mal_context_init__openal(pContext);
} break;
#endif
- #ifdef MAL_ENABLE_NULL
+ #ifdef MAL_HAS_NULL
case mal_backend_null:
{
result = mal_context_init__null(pContext);
@@ -8595,49 +8641,49 @@ mal_result mal_context_uninit(mal_context* pContext)
if (pContext == NULL) return MAL_INVALID_ARGS;
switch (pContext->backend) {
- #ifdef MAL_ENABLE_WASAPI
+ #ifdef MAL_HAS_WASAPI
case mal_backend_wasapi:
{
return mal_context_uninit__wasapi(pContext);
} break;
#endif
- #ifdef MAL_ENABLE_DSOUND
+ #ifdef MAL_HAS_DSOUND
case mal_backend_dsound:
{
return mal_context_uninit__dsound(pContext);
} break;
#endif
- #ifdef MAL_ENABLE_WINMM
+ #ifdef MAL_HAS_WINMM
case mal_backend_winmm:
{
return mal_context_uninit__winmm(pContext);
} break;
#endif
- #ifdef MAL_ENABLE_ALSA
+ #ifdef MAL_HAS_ALSA
case mal_backend_alsa:
{
return mal_context_uninit__alsa(pContext);
} break;
#endif
- #ifdef MAL_ENABLE_OSS
+ #ifdef MAL_HAS_OSS
case mal_backend_oss:
{
return mal_context_uninit__oss(pContext);
} break;
#endif
- #ifdef MAL_ENABLE_OPENSL
+ #ifdef MAL_HAS_OPENSL
case mal_backend_opensl:
{
return mal_context_uninit__opensl(pContext);
} break;
#endif
- #ifdef MAL_ENABLE_OPENAL
+ #ifdef MAL_HAS_OPENAL
case mal_backend_openal:
{
return mal_context_uninit__openal(pContext);
} break;
#endif
- #ifdef MAL_ENABLE_NULL
+ #ifdef MAL_HAS_NULL
case mal_backend_null:
{
return mal_context_uninit__null(pContext);
@@ -8660,49 +8706,49 @@ mal_result mal_enumerate_devices(mal_context* pContext, mal_device_type type, ma
switch (pContext->backend)
{
- #ifdef MAL_ENABLE_WASAPI
+ #ifdef MAL_HAS_WASAPI
case mal_backend_wasapi:
{
return mal_enumerate_devices__wasapi(pContext, type, pCount, pInfo);
} break;
#endif
- #ifdef MAL_ENABLE_DSOUND
+ #ifdef MAL_HAS_DSOUND
case mal_backend_dsound:
{
return mal_enumerate_devices__dsound(pContext, type, pCount, pInfo);
} break;
#endif
- #ifdef MAL_ENABLE_WINMM
+ #ifdef MAL_HAS_WINMM
case mal_backend_winmm:
{
return mal_enumerate_devices__winmm(pContext, type, pCount, pInfo);
} break;
#endif
- #ifdef MAL_ENABLE_ALSA
+ #ifdef MAL_HAS_ALSA
case mal_backend_alsa:
{
return mal_enumerate_devices__alsa(pContext, type, pCount, pInfo);
} break;
#endif
- #ifdef MAL_ENABLE_OSS
+ #ifdef MAL_HAS_OSS
case mal_backend_oss:
{
return mal_enumerate_devices__oss(pContext, type, pCount, pInfo);
} break;
#endif
- #ifdef MAL_ENABLE_OPENSL
+ #ifdef MAL_HAS_OPENSL
case mal_backend_opensl:
{
return mal_enumerate_devices__opensl(pContext, type, pCount, pInfo);
} break;
#endif
- #ifdef MAL_ENABLE_OPENAL
+ #ifdef MAL_HAS_OPENAL
case mal_backend_openal:
{
return mal_enumerate_devices__openal(pContext, type, pCount, pInfo);
} break;
#endif
- #ifdef MAL_ENABLE_NULL
+ #ifdef MAL_HAS_NULL
case mal_backend_null:
{
return mal_enumerate_devices__null(pContext, type, pCount, pInfo);
@@ -8819,49 +8865,49 @@ mal_result mal_device_init(mal_context* pContext, mal_device_type type, mal_devi
mal_result result = MAL_NO_BACKEND;
switch (pContext->backend)
{
- #ifdef MAL_ENABLE_WASAPI
+ #ifdef MAL_HAS_WASAPI
case mal_backend_wasapi:
{
result = mal_device_init__wasapi(pContext, type, pDeviceID, &config, pDevice);
} break;
#endif
- #ifdef MAL_ENABLE_DSOUND
+ #ifdef MAL_HAS_DSOUND
case mal_backend_dsound:
{
result = mal_device_init__dsound(pContext, type, pDeviceID, &config, pDevice);
} break;
#endif
- #ifdef MAL_ENABLE_WINMM
+ #ifdef MAL_HAS_WINMM
case mal_backend_winmm:
{
result = mal_device_init__winmm(pContext, type, pDeviceID, &config, pDevice);
} break;
#endif
- #ifdef MAL_ENABLE_ALSA
+ #ifdef MAL_HAS_ALSA
case mal_backend_alsa:
{
result = mal_device_init__alsa(pContext, type, pDeviceID, &config, pDevice);
} break;
#endif
- #ifdef MAL_ENABLE_OSS
+ #ifdef MAL_HAS_OSS
case mal_backend_oss:
{
result = mal_device_init__oss(pContext, type, pDeviceID, &config, pDevice);
} break;
#endif
- #ifdef MAL_ENABLE_OPENSL
+ #ifdef MAL_HAS_OPENSL
case mal_backend_opensl:
{
result = mal_device_init__opensl(pContext, type, pDeviceID, &config, pDevice);
} break;
#endif
- #ifdef MAL_ENABLE_OPENAL
+ #ifdef MAL_HAS_OPENAL
case mal_backend_openal:
{
result = mal_device_init__openal(pContext, type, pDeviceID, &config, pDevice);
} break;
#endif
- #ifdef MAL_ENABLE_NULL
+ #ifdef MAL_HAS_NULL
case mal_backend_null:
{
result = mal_device_init__null(pContext, type, pDeviceID, &config, pDevice);
@@ -8949,42 +8995,42 @@ void mal_device_uninit(mal_device* pDevice)
mal_event_uninit(&pDevice->wakeupEvent);
mal_mutex_uninit(&pDevice->lock);
-#ifdef MAL_ENABLE_WASAPI
+#ifdef MAL_HAS_WASAPI
if (pDevice->pContext->backend == mal_backend_wasapi) {
mal_device_uninit__wasapi(pDevice);
}
#endif
-#ifdef MAL_ENABLE_DSOUND
+#ifdef MAL_HAS_DSOUND
if (pDevice->pContext->backend == mal_backend_dsound) {
mal_device_uninit__dsound(pDevice);
}
#endif
-#ifdef MAL_ENABLE_WINMM
+#ifdef MAL_HAS_WINMM
if (pDevice->pContext->backend == mal_backend_winmm) {
mal_device_uninit__winmm(pDevice);
}
#endif
-#ifdef MAL_ENABLE_ALSA
+#ifdef MAL_HAS_ALSA
if (pDevice->pContext->backend == mal_backend_alsa) {
mal_device_uninit__alsa(pDevice);
}
#endif
-#ifdef MAL_ENABLE_OSS
+#ifdef MAL_HAS_OSS
if (pDevice->pContext->backend == mal_backend_oss) {
mal_device_uninit__oss(pDevice);
}
#endif
-#ifdef MAL_ENABLE_OPENSL
+#ifdef MAL_HAS_OPENSL
if (pDevice->pContext->backend == mal_backend_opensl) {
mal_device_uninit__opensl(pDevice);
}
#endif
-#ifdef MAL_ENABLE_OPENAL
+#ifdef MAL_HAS_OPENAL
if (pDevice->pContext->backend == mal_backend_openal) {
mal_device_uninit__openal(pDevice);
}
#endif
-#ifdef MAL_ENABLE_NULL
+#ifdef MAL_HAS_NULL
if (pDevice->pContext->backend == mal_backend_null) {
mal_device_uninit__null(pDevice);
}
@@ -9039,7 +9085,7 @@ mal_result mal_device_start(mal_device* pDevice)
mal_device__set_state(pDevice, MAL_STATE_STARTING);
// Asynchronous backends need to be handled differently.
-#ifdef MAL_ENABLE_OPENSL
+#ifdef MAL_HAS_OPENSL
if (pDevice->pContext->backend == mal_backend_opensl) {
mal_device__start_backend__opensl(pDevice);
mal_device__set_state(pDevice, MAL_STATE_STARTED);
@@ -9090,7 +9136,7 @@ mal_result mal_device_stop(mal_device* pDevice)
// There's no need to wake up the thread like we do when starting.
// Asynchronous backends need to be handled differently.
-#ifdef MAL_ENABLE_OPENSL
+#ifdef MAL_HAS_OPENSL
if (pDevice->pContext->backend == mal_backend_opensl) {
mal_device__stop_backend__opensl(pDevice);
} else
@@ -10514,6 +10560,9 @@ void mal_pcm_f32_to_s32(int* pOut, const float* pIn, unsigned int count)
// need to update.
// - API CHANGE: SRC and DSP callbacks now take a pointer to a mal_src and mal_dsp object respectively.
// - API CHANGE: Improvements to event and thread APIs. These changes make these APIs more consistent.
+// - Simplify the build system further for when development packages for various backends are not installed.
+// With this change, when the compiler supports __has_include, backends without the relevant development
+// packages installed will be ignored. This fixes the build for old versions of MinGW.
// - Add mal_convert_frames(). This is a high-level helper API for performing a one-time, bulk conversion of
// audio data to a different format.
// - Improvements to f32 -> u8/s16/s24/s32 conversion routines.