Add sync audio for emscripten

binding-mruby/audio-binding.cpp

@@ -27,7 +27,7 @@
 #define DEF_PLAY_STOP(entity) \
 	MRB_FUNCTION(audio_##entity##Play) \
 	{ \
-		return mrb_nil_value();char *filename; \
+		char *filename; \
 		mrb_int volume = 100; \
 		mrb_int pitch = 100; \
 		mrb_get_args(mrb, "z|ii", &filename, &volume, &pitch); \
@@ -36,7 +36,7 @@
 	} \
 	MRB_FUNCTION(audio_##entity##Stop) \
 	{ \
-		return mrb_nil_value();MRB_FUN_UNUSED_PARAM; \
+		MRB_FUN_UNUSED_PARAM; \
 		shState->audio().entity##Stop(); \
 		return mrb_nil_value(); \
 	}
@@ -44,7 +44,7 @@
 #define DEF_FADE(entity) \
 MRB_FUNCTION(audio_##entity##Fade) \
 { \
-	return mrb_nil_value();mrb_int time; \
+	mrb_int time; \
 	mrb_get_args(mrb, "i", &time); \
 	shState->audio().entity##Fade(time); \
 	return mrb_nil_value(); \

binding-mruby/graphics-binding.cpp

@@ -19,6 +19,10 @@
 ** along with mkxp.  If not, see <http://www.gnu.org/licenses/>.
 */
 
+#ifdef __EMSCRIPTEN__
+#include "audio.h"
+#endif
+
 #include "graphics.h"
 #include "sharedstate.h"
 #include "binding-util.h"
@@ -30,6 +34,10 @@ MRB_FUNCTION(graphicsUpdate)
 
 	shState->graphics().update();
 
+#ifdef __EMSCRIPTEN__
+	shState->audio().update();
+#endif
+
 	return mrb_nil_value();
 }
 

src/alstream.cpp

@@ -302,8 +302,12 @@ void ALStream::startStream(float offset)
 	startOffset = offset;
 	procFrames = offset * source->sampleRate();
 
+#ifdef __EMSCRIPTEN__
+	streamData();
+#else
 	thread = createSDLThread
 		<ALStream, &ALStream::streamData>(this, threadName);
+#endif
 }
 
 void ALStream::pauseStream()
@@ -362,7 +366,6 @@ void ALStream::streamData()
 {
 	/* Fill up queue */
 	bool firstBuffer = true;
-	ALDataSource::Status status;
 
 	if (threadTermReq)
 		return;
@@ -406,74 +409,82 @@ void ALStream::streamData()
 
 	/* Wait for buffers to be consumed, then
 	 * refill and queue them up again */
+#ifndef __EMSCRIPTEN__
 	while (true)
 	{
-		shState->rtData().syncPoint.passSecondarySync();
-
-		ALint procBufs = AL::Source::getProcBufferCount(alSrc);
-
-		while (procBufs--)
-		{
-			if (threadTermReq)
-				break;
-
-			AL::Buffer::ID buf = AL::Source::unqueueBuffer(alSrc);
-
-			/* If something went wrong, try again later */
-			if (buf == AL::Buffer::ID(0))
-				break;
-
-			if (buf == lastBuf)
-			{
-				/* Reset the processed sample count so
-				 * querying the playback offset returns 0.0 again */
-				procFrames = source->loopStartFrames();
-				lastBuf = AL::Buffer::ID(0);
-			}
-			else
-			{
-				/* Add the frame count contained in this
-				 * buffer to the total count */
-				ALint bits = AL::Buffer::getBits(buf);
-				ALint size = AL::Buffer::getSize(buf);
-				ALint chan = AL::Buffer::getChannels(buf);
-
-				if (bits != 0 && chan != 0)
-					procFrames += ((size / (bits / 8)) / chan);
-			}
-
-			if (sourceExhausted)
-				continue;
-
-			status = source->fillBuffer(buf);
-
-			if (status == ALDataSource::Error)
-			{
-				sourceExhausted.set();
-				return;
-			}
-
-			AL::Source::queueBuffer(alSrc, buf);
-
-			/* In case of buffer underrun,
-			 * start playing again */
-			if (AL::Source::getState(alSrc) == AL_STOPPED)
-				AL::Source::play(alSrc);
-
-			/* If this was the last buffer before the data
-			 * source loop wrapped around again, mark it as
-			 * such so we can catch it and reset the processed
-			 * sample count once it gets unqueued */
-			if (status == ALDataSource::WrapAround)
-				lastBuf = buf;
-
-			if (status == ALDataSource::EndOfStream)
-				sourceExhausted.set();
-		}
+		streamDevice();
 
 		if (threadTermReq)
 			break;
-
 		SDL_Delay(AUDIO_SLEEP);
 	}
+#endif
+}
+
+void ALStream::update() {
+	if (threadTermReq)
+		return;
+
+	shState->rtData().syncPoint.passSecondarySync();
+
+	ALint procBufs = AL::Source::getProcBufferCount(alSrc);
+
+	while (procBufs--)
+	{
+		if (threadTermReq)
+			break;
+
+		AL::Buffer::ID buf = AL::Source::unqueueBuffer(alSrc);
+
+		/* If something went wrong, try again later */
+		if (buf == AL::Buffer::ID(0))
+			break;
+
+		if (buf == lastBuf)
+		{
+			/* Reset the processed sample count so
+			 * querying the playback offset returns 0.0 again */
+			procFrames = source->loopStartFrames();
+			lastBuf = AL::Buffer::ID(0);
+		}
+		else
+		{
+			/* Add the frame count contained in this
+			 * buffer to the total count */
+			ALint bits = AL::Buffer::getBits(buf);
+			ALint size = AL::Buffer::getSize(buf);
+			ALint chan = AL::Buffer::getChannels(buf);
+
+			if (bits != 0 && chan != 0)
+				procFrames += ((size / (bits / 8)) / chan);
+		}
+
+		if (sourceExhausted)
+			continue;
+
+		status = source->fillBuffer(buf);
+
+		if (status == ALDataSource::Error)
+		{
+			sourceExhausted.set();
+			return;
+		}
+
+		AL::Source::queueBuffer(alSrc, buf);
+
+		/* In case of buffer underrun,
+		 * start playing again */
+		if (AL::Source::getState(alSrc) == AL_STOPPED)
+			AL::Source::play(alSrc);
+
+		/* If this was the last buffer before the data
+		 * source loop wrapped around again, mark it as
+		 * such so we can catch it and reset the processed
+		 * sample count once it gets unqueued */
+		if (status == ALDataSource::WrapAround)
+			lastBuf = buf;
+
+		if (status == ALDataSource::EndOfStream)
+			sourceExhausted.set();
+	}
 }

src/alstream.h

@@ -23,13 +23,12 @@
 #define ALSTREAM_H
 
 #include "al-util.h"
+#include "aldatasource.h"
 #include "sdl-util.h"
 
 #include <string>
 #include <SDL_rwops.h>
 
-struct ALDataSource;
-
 #define STREAM_BUFS 3
 
 /* State-machine like audio playback stream.
@@ -104,6 +103,8 @@ struct ALStream
 	float queryOffset();
 	bool queryNativePitch();
 
+	void update();
+
 private:
 	void closeSource();
 	void openSource(const std::string &filename);
@@ -117,6 +118,8 @@ private:
 
 	/* thread func */
 	void streamData();
+
+	ALDataSource::Status status;
 };
 
 #endif // ALSTREAM_H

src/audio.cpp

@@ -71,22 +71,27 @@ struct AudioPrivate
 	      syncPoint(rtData.syncPoint)
 	{
 		meWatch.state = MeNotPlaying;
+#ifndef __EMSCRIPTEN__
 		meWatch.thread = createSDLThread
 			<AudioPrivate, &AudioPrivate::meWatchFun>(this, "audio_mewatch");
+#endif
 	}
 
 	~AudioPrivate()
 	{
 		meWatch.termReq.set();
+#ifndef __EMSCRIPTEN__
 		SDL_WaitThread(meWatch.thread, 0);
+#endif
 	}
 
 	void meWatchFun()
 	{
 		const float fadeOutStep = 1.f / (200  / AUDIO_SLEEP);
 		const float fadeInStep  = 1.f / (1000 / AUDIO_SLEEP);
-
+#ifndef __EMSCRIPTEN__
 		while (true)
+#endif
 		{
 			syncPoint.passSecondarySync();
 
@@ -231,8 +236,9 @@ struct AudioPrivate
 				break;
 			}
 			}
-
+#ifndef __EMSCRIPTEN__
 			SDL_Delay(AUDIO_SLEEP);
+#endif
 		}
 	}
 };
@@ -247,6 +253,7 @@ void Audio::bgmPlay(const char *filename,
                     int pitch,
                     float pos)
 {
+	printf("PLAYING BGM %s\n", filename);
 	p->bgm.play(filename, volume, pitch, pos);
 }
 
@@ -333,4 +340,14 @@ void Audio::reset()
 	p->se.stop();
 }
 
+void Audio::update()
+{
+#ifdef __EMSCRIPTEN__
+	p->bgm.update();
+	p->bgm.update();
+	p->me.update();
+	p->meWatchFun();
+#endif
+}
+
 Audio::~Audio() { delete p; }

src/audio.h

@@ -69,6 +69,8 @@ public:
 
 	void reset();
 
+	void update();
+
 private:
 	Audio(RGSSThreadData &rtData);
 	~Audio();

src/audiostream.cpp

@@ -203,12 +203,14 @@ void AudioStream::fadeOut(int duration)
 		return;
 	}
 
+#ifdef __EMSCRIPTEN__
 	if (fade.thread)
 	{
 		fade.reqFini.set();
 		SDL_WaitThread(fade.thread, 0);
 		fade.thread = 0;
 	}
+#endif
 
 	fade.active.set();
 	fade.msStep = 1.0f / duration;
@@ -216,8 +218,10 @@ void AudioStream::fadeOut(int duration)
 	fade.reqTerm.clear();
 	fade.startTicks = SDL_GetTicks();
 
+#ifndef __EMSCRIPTEN__
 	fade.thread = createSDLThread
 		<AudioStream, &AudioStream::fadeOutThread>(this, fade.threadName);
+#endif
 
 	unlockStream();
 }
@@ -280,24 +284,38 @@ void AudioStream::finiFadeOutInt()
 
 void AudioStream::startFadeIn()
 {
+#ifdef __EMSCRIPTEN__
 	/* Previous fadein should always be terminated in play() */
 	assert(!fadeIn.thread);
+#endif
 
 	fadeIn.rqFini.clear();
 	fadeIn.rqTerm.clear();
 	fadeIn.startTicks = SDL_GetTicks();
 
+#ifdef __EMSCRIPTEN__
+	fadeInThread();
+#else
 	fadeIn.thread = createSDLThread
 		<AudioStream, &AudioStream::fadeInThread>(this, fadeIn.threadName);
+#endif
 }
 
 void AudioStream::fadeOutThread()
 {
+#ifndef __EMSCRIPTEN__
 	while (true)
+#else
+	if (fade.active)
+#endif
 	{
 		/* Just immediately terminate on request */
 		if (fade.reqTerm)
+#ifdef __EMSCRIPTEN__
+			return;
+#else
 			break;
+#endif
 
 		lockStream();
 
@@ -315,18 +333,26 @@ void AudioStream::fadeOutThread()
 
 			setVolume(FadeOut, 1.0f);
 			unlockStream();
-
+#ifdef __EMSCRIPTEN__
+			fade.active.clear();
+			return;
+#else
 			break;
+#endif
+
 		}
 
 		setVolume(FadeOut, resVol);
 
 		unlockStream();
-
+#ifndef __EMSCRIPTEN__
 		SDL_Delay(AUDIO_SLEEP);
+#endif
 	}
 
+#ifndef __EMSCRIPTEN__
 	fade.active.clear();
+#endif
 }
 
 void AudioStream::fadeInThread()
@@ -363,3 +389,9 @@ void AudioStream::fadeInThread()
 		SDL_Delay(AUDIO_SLEEP);
 	}
 }
+
+void AudioStream::update()
+{
+	fadeOutThread();
+	stream.update();
+}

src/audiostream.h

@@ -140,6 +140,8 @@ struct AudioStream
 
 	float playingOffset();
 
+	void update();
+
 private:
 	float volumes[VolumeTypeCount];
 	void updateVolume();

src/sdlsoundsource.cpp

@@ -46,6 +46,7 @@ struct SDLSoundSource : ALDataSource
 		if (!sample)
 		{
 			SDL_RWclose(&ops);
+			printf("ERROR SDL_sound: %s", Sound_GetError());
 			throw Exception(Exception::SDLError, "SDL_sound: %s", Sound_GetError());
 		}