Initial Android OpenSL ES implementation, contributed by ANTA

Android.mk

@@ -20,6 +20,7 @@ LOCAL_SRC_FILES := \
 	$(wildcard $(LOCAL_PATH)/src/audio/*.c) \
 	$(wildcard $(LOCAL_PATH)/src/audio/android/*.c) \
 	$(wildcard $(LOCAL_PATH)/src/audio/dummy/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/audio/openslES/*.c) \
 	$(LOCAL_PATH)/src/atomic/SDL_atomic.c.arm \
 	$(LOCAL_PATH)/src/atomic/SDL_spinlock.c.arm \
 	$(wildcard $(LOCAL_PATH)/src/core/android/*.c) \
@@ -69,7 +70,7 @@ LOCAL_CFLAGS += \
 LOCAL_CFLAGS += -Wno-unused-parameter -Wno-sign-compare
  
 
-LOCAL_LDLIBS := -ldl -lGLESv1_CM -lGLESv2 -llog -landroid
+LOCAL_LDLIBS := -ldl -lGLESv1_CM -lGLESv2 -lOpenSLES -llog -landroid
 
 ifeq ($(NDK_DEBUG),1)
     cmd-strip :=

include/SDL_config_android.h

@@ -130,6 +130,7 @@
 
 /* Enable various audio drivers */
 #define SDL_AUDIO_DRIVER_ANDROID    1
+#define SDL_AUDIO_DRIVER_OPENSLES   1
 #define SDL_AUDIO_DRIVER_DUMMY  1
 
 /* Enable various input drivers */

src/audio/SDL_audio.c

@@ -92,6 +92,9 @@ static const AudioBootStrap *const bootstrap[] = {
 #if SDL_AUDIO_DRIVER_ANDROID
     &ANDROIDAUDIO_bootstrap,
 #endif
+#if SDL_AUDIO_DRIVER_OPENSLES
+    &openslES_bootstrap,
+#endif
 #if SDL_AUDIO_DRIVER_PSP
     &PSPAUDIO_bootstrap,
 #endif

src/audio/SDL_sysaudio.h

@@ -205,6 +205,7 @@ extern AudioBootStrap DISKAUDIO_bootstrap;
 extern AudioBootStrap DUMMYAUDIO_bootstrap;
 extern AudioBootStrap FUSIONSOUND_bootstrap;
 extern AudioBootStrap ANDROIDAUDIO_bootstrap;
+extern AudioBootStrap openslES_bootstrap;
 extern AudioBootStrap PSPAUDIO_bootstrap;
 extern AudioBootStrap EMSCRIPTENAUDIO_bootstrap;
 

src/audio/openslES/SDL_openslES.h

@@ -0,0 +1,42 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2019 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_internal.h"
+
+#ifndef _SDL_openslesaudio_h
+#define _SDL_openslesaudio_h
+
+#include "../SDL_sysaudio.h"
+
+/* Hidden "this" pointer for the audio functions */
+#define _THIS   SDL_AudioDevice *this
+
+struct SDL_PrivateAudioData
+{
+    /* The file descriptor for the audio device */
+    Uint8 *mixbuf;
+    Uint32 mixlen;
+    Uint32 write_delay;
+    Uint32 initial_calls;
+};
+
+#endif /* _SDL_openslesaudio_h */
+
+/* vi: set ts=4 sw=4 expandtab: */