Make openal default audio driver

Makefile.common

@@ -758,8 +758,10 @@ ifeq ($(HAVE_EMSCRIPTEN), 1)
    OBJ += frontend/drivers/platform_emscripten.o \
           input/drivers/rwebinput_input.o \
           input/drivers_joypad/rwebpad_joypad.o \
-          audio/drivers/rwebaudio.o \
           camera/drivers/rwebcam.o
+   ifeq ($(HAVE_RWEBAUDIO), 1)
+      OBJ += audio/drivers/rwebaudio.o
+   endif
 endif
 
 ifeq ($(HAVE_BLUETOOTH), 1)

Makefile.emscripten

@@ -46,6 +46,16 @@ HAVE_IBXM = 1
 HAVE_CORE_INFO_CACHE = 1
 HAVE_7ZIP = 1
 HAVE_BSV_MOVIE = 1
+HAVE_AL = 1
+
+
+# WARNING -- READ BEFORE ENABLING
+# The rwebaudio driver is known to have several audio bugs, such as
+#  minor crackling, or the entire page freezing/crashing.
+#  It works perfectly on chrome, but even firefox has really bad audio quality.
+#  I should also note, the driver on iOS is completely broken (crashes the page).
+#  You have been warned.
+HAVE_RWEBAUDIO = 0
 
 ASYNC ?= 0
 ifeq ($(LIBRETRO), mupen64plus)
@@ -70,9 +80,17 @@ OBJDIR := obj-emscripten
 LIBS    := -s USE_ZLIB=1
 LDFLAGS := -L. --no-heap-copy -s $(LIBS) -s TOTAL_MEMORY=$(MEMORY) -s NO_EXIT_RUNTIME=0 -s FULL_ES2=1 -s "EXTRA_EXPORTED_RUNTIME_METHODS=['callMain']" \
            -s ALLOW_MEMORY_GROWTH=1 -s EXPORTED_FUNCTIONS="['_main', '_malloc', '_cmd_savefiles', '_cmd_save_state', '_cmd_load_state', '_cmd_take_screenshot']" \
-           --js-library emscripten/library_rwebaudio.js \
+           --js-library emscripten/library_errno_codes.js \
-           --js-library emscripten/library_rwebcam.js \
+           --js-library emscripten/library_rwebcam.js
-           --js-library emscripten/library_errno_codes.js
+
+ifeq ($(HAVE_RWEBAUDIO), 1)
+   LDFLAGS += --js-library emscripten/library_rwebaudio.js
+   DEFINES += -DHAVE_RWEBAUDIO
+endif
+ifeq ($(HAVE_AL), 1)
+   LDFLAGS += -lopenal
+   DEFINES += -DHAVE_AL
+endif
 
 ifneq ($(PTHREAD), 0)
    LDFLAGS += -s WASM_MEM_MAX=1073741824 -pthread -s PTHREAD_POOL_SIZE=$(PTHREAD)

audio/audio_driver.c

@@ -143,7 +143,7 @@ audio_driver_t *audio_drivers[] = {
 #ifdef WIIU
    &audio_ax,
 #endif
-#ifdef EMSCRIPTEN
+#if defined(EMSCRIPTEN) && defined(HAVE_RWEBAUDIO)
    &audio_rwebaudio,
 #endif
 #if defined(PSP) || defined(VITA) || defined(ORBIS)

audio/drivers/openal.c

@@ -237,7 +237,11 @@ static bool al_start(void *data, bool is_shutdown)
 {
    al_t *al = (al_t*)data;
    if (al)
-      al->is_paused = false;
+#ifdef EMSCRIPTEN //NEVER EVER BLOCK THE MAIN THREAD!! Emscripten will handle this for us :)
+      al->nonblock = true;
+#else
+      al->nonblock = state;
+#endif
    return true;
 }
 

retroarch.c

@@ -4930,7 +4930,9 @@ int rarch_main(int argc, char *argv[], void *data)
 #if defined(EMSCRIPTEN)
 #include "gfx/common/gl_common.h"
 
+#ifdef HAVE_RWEBAUDIO
 void RWebAudioRecalibrateTime(void);
+#endif
 
 void emscripten_mainloop(void)
 {
@@ -4946,7 +4948,9 @@ void emscripten_mainloop(void)
    bool runloop_is_slowmotion             = runloop_flags & RUNLOOP_FLAG_SLOWMOTION;
    bool runloop_is_paused                 = runloop_flags & RUNLOOP_FLAG_PAUSED;
 
+#ifdef HAVE_RWEBAUDIO
    RWebAudioRecalibrateTime();
+#endif
 
    emscripten_frame_count++;