#9 support Web Audio API, defines for ADPCM, MP3 & OGG decoders, play bubble sound when Lara is under water

src/controller.h

@@ -166,10 +166,7 @@ struct Controller {
         if (b.chance == 0 || (rand() & 0x7fff) <= b.chance) {
             uint32 c = level->soundOffsets[b.offset + rand() % ((b.flags & 0xFF) >> 2)];
             void *p = &level->soundData[c];
-        #ifdef WIN32           
             Sound::play(new Stream(p, 1024 * 1024), b.volume / 255.0f, 0.0f, Sound::Flags::PAN);
-        //    PlaySound((LPSTR)p, NULL, SND_ASYNC | SND_MEMORY);
-        #endif
         }
     }
 
@@ -374,7 +371,7 @@ struct Controller {
                         if (frameIndex != animPrevFrame && frameIndex + anim->frameStart == ptr[0]) {
                             switch (ptr[1]) {
                                 case TR::ANIM_CMD_SPECIAL_FLIP   : angle.y = angle.y + PI;    break;
-                                case TR::ANIM_CMD_SPECIAL_BUBBLE : /* playSound(TR::SND_BUBBLE); */ break;
+                                case TR::ANIM_CMD_SPECIAL_BUBBLE : playSound(TR::SND_BUBBLE); break;
                                 case TR::ANIM_CMD_SPECIAL_CTRL   : LOG("water out ?\n");      break;
                                 default : LOG("unknown special cmd %d\n", (int)ptr[1]);
                             }

src/game.h

@@ -15,9 +15,11 @@ namespace Game {
         Stream stream("LEVEL2_DEMO.PHD");
         level = new Level(stream);
 
+        #ifndef __EMSCRIPTEN__    
             //Sound::play(Sound::openWAD("05_Lara's_Themes.wav"), 1, 1, 0);
             Sound::play(new Stream("05.ogg"), 1, 1, 0);
             //Sound::play(new Stream("03.mp3"), 1, 1, 0);
+        #endif
     }
 
     void free() {

src/sound.h

@@ -1,13 +1,25 @@
 #ifndef H_SOUND
 #define H_SOUND
 
+//#define DECODE_ADPCM
+//#define DECODE_MP3
+#define DECODE_OGG
+
+#ifdef __EMSCRIPTEN__ // TODO: http streaming
+    #undef DECODE_MP3
+    #undef DECODE_OGG
+#endif
+
 #include "utils.h"
+#ifdef DECODE_MP3
     #include "libs/minimp3/minimp3.h"
+#endif
+#ifdef DECODE_OGG
     #define STB_VORBIS_HEADER_ONLY
     #include "libs/stb_vorbis/stb_vorbis.c"
+#endif
 
 #define SND_CHANNELS_MAX    32
-#define BUFFER_SIZE_MP3     8192
 
 namespace Sound {
 
@@ -56,6 +68,7 @@ namespace Sound {
         }
     };
 
+#ifdef DECODE_ADPCM
     struct ADPCM : Decoder { // https://wiki.multimedia.cx/?title=Microsoft_ADPCM
         int size, block;
 
@@ -127,7 +140,9 @@ namespace Sound {
             }
         }
     };
+#endif
 	
+#ifdef DECODE_MP3
     struct MP3 : Decoder {
         mp3_decoder_t   mp3;
         char    *buffer;
@@ -160,7 +175,9 @@ namespace Sound {
             return i;
         }
     };
+#endif
 
+#ifdef DECODE_OGG
     struct OGG : Decoder {
         stb_vorbis       *ogg;
         stb_vorbis_alloc alloc;
@@ -195,6 +212,7 @@ namespace Sound {
             return i;
         }
     };
+#endif
 
     struct Listener {
         mat4 matrix;
@@ -216,7 +234,7 @@ namespace Sound {
         int     flags;
         bool    isPlaying;
 
-        Sample(Stream *stream, float volume, float pitch, int flags) : decoder(NULL), volume(volume), pitch(pitch), flags(flags), isPlaying(true) {
+        Sample(Stream *stream, float volume, float pitch, int flags) : decoder(NULL), volume(volume), pitch(pitch), flags(flags) {
             uint32 fourcc; 
             stream->read(fourcc);
             if (fourcc == FOURCC("RIFF")) { // wav
@@ -240,19 +258,28 @@ namespace Sound {
                         stream->seek(size - sizeof(waveFmt));
                     } else if (type == FOURCC("data")) {
                         if (waveFmt.format == 1) decoder = new   PCM(stream, waveFmt.channels, waveFmt.samplesPerSec, size, waveFmt.sampleBits);
+                        #ifdef DECODE_ADPCM
                         if (waveFmt.format == 2) decoder = new ADPCM(stream, waveFmt.channels, size, waveFmt.block);
+                        #endif
                         break;
                     } else
                         stream->seek(size);
                 }
-            } else if (fourcc == FOURCC("OggS")) { // ogg
+            } 
+            #ifdef DECODE_OGG
+            else if (fourcc == FOURCC("OggS")) { // ogg
                 stream->seek(-4);
                 decoder = new OGG(stream, 2);
-            } else if (fourcc == FOURCC("ID3\3")) { // mp3
+            }
+            #endif 
+            #ifdef DECODE_MP3
+            else if (fourcc == FOURCC("ID3\3")) { // mp3                
                 decoder = new MP3(stream, 2);
             }
+            #endif
 			
-            ASSERT(decoder != NULL);
+            isPlaying = decoder != NULL;
+            ASSERT(isPlaying);
         }
 
         ~Sample() {
@@ -260,6 +287,7 @@ namespace Sound {
         }
 
         bool render(Frame *frames, int count) {
+            if (!isPlaying) return 0;
             int i = 0;
             while (i < count) {
                 int res = decoder->decode(&frames[i], count - i);
@@ -277,13 +305,17 @@ namespace Sound {
 
     void init() {
         channelsCount = 0;
+    #ifdef DECODE_MP3
         mp3_decode_init();
+    #endif
     }
 
     void free() {
         for (int i = 0; i < channelsCount; i++)
             delete channels[i];
+    #ifdef DECODE_MP3
         mp3_decode_free();
+    #endif
     }
 
     void fill(Frame *frames, int count) {

src/web/build.bat

@@ -1,3 +1,3 @@
-set SRC=main.cpp ../libs/minimp3/minimp3.cpp ../libs/stb_vorbis/stb_vorbis.c
+set SRC=main.cpp
-call em++ %SRC% -O2 -s ASSERTIONS=1 -Wno-deprecated-register --llvm-opts 2 --closure 2 -std=c++11 -o OpenLara.js --preload-file ./LEVEL2_DEMO.PHD -I..\
+call em++ %SRC% -O2 -s ASSERTIONS=1 -Wno-deprecated-register --llvm-opts 2 --closure 1 -std=c++11 -o OpenLara.js --preload-file ./LEVEL2_DEMO.PHD -I..\
 gzip.exe -9 -f OpenLara.data OpenLara.js OpenLara.js.mem

src/web/index.html

@@ -41,9 +41,31 @@
 					monitorRunDependencies: function(left) {
 						this.totalDependencies = Math.max(this.totalDependencies, left);
 						Module.setStatus(left ? 'Preparing... (' + (this.totalDependencies-left) + '/' + this.totalDependencies + ')' : 'All downloads complete.');
-					}
+					},
 				};
 			
+				function snd_init() {
+					var AudioContext = window.AudioContext || window.webkitAudioContext;
+					if (!AudioContext) return;
+					var ctx = new (window.AudioContext || window.webkitAudioContext)();
+					var count  = 2048;
+					var frames = Module._malloc(count * 4); // interleaved short L, R
+					var proc   = ctx.createScriptProcessor(count, 2, 2);
+
+					proc.onaudioprocess = function(e) {
+						var L = e.outputBuffer.getChannelData(0),
+							R = e.outputBuffer.getChannelData(1);
+						Module.ccall('snd_fill', 'null', ['number', 'number'], [frames, count]);
+						var index = frames;
+						for (var i = 0; i < count; i++) {
+							L[i] = Module.getValue(index    , 'i16') / 0x8000;
+							R[i] = Module.getValue(index + 2, 'i16') / 0x8000;
+							index += 4;
+						}
+					}
+					proc.connect(ctx.destination);
+				}
+				
 				var gl = canvasElement.getContext("webgl") || canvasElement.getContext("experimental-webgl");
 				
 				Module.setStatus('Downloading...');
@@ -74,5 +96,7 @@
 				script.src = "OpenLara.js";
 				document.body.appendChild(script);
 			</script>
+						
+			<audio autoplay loop><source src="05.ogg" type="audio/ogg"></audio>
 		</body>
 </html>

src/web/main.cpp

@@ -12,6 +12,12 @@ int getTime() {
     return (int)emscripten_get_now();
 }
 
+extern "C" {
+    void EMSCRIPTEN_KEEPALIVE snd_fill(Sound::Frame *frames, int count) {
+		Sound::fill(frames, count);		
+    }
+}
+
 void main_loop() {
     int time = getTime();
 
@@ -168,7 +174,7 @@ EM_BOOL mouseCallback(int eventType, const EmscriptenMouseEvent *e, void *userDa
 int main() {
     initGL();
 
-    emscripten_set_canvas_size(Core::width = 1280, Core::height = 720);
+    emscripten_set_canvas_size(Core::width = 854, Core::height = 480);
 
     emscripten_set_keydown_callback(0, 0, 1, keyCallback);
     emscripten_set_keyup_callback(0, 0, 1, keyCallback);
@@ -185,6 +191,8 @@ int main() {
 
     Game::init();
 
+    emscripten_run_script("snd_init()");
+
     lastTime = getTime();
     fpsTime  = lastTime + 1000;
     fps      = 0;