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|
//"use strict";
var LibraryOpenAL = {
$AL__deps: ['$Browser'],
$AL: {
contexts: [],
currentContext: null,
structs: {
Rect: Runtime.generateStructInfo([
['i32', 'x'], ['i32', 'y'], ['i32', 'w'], ['i32', 'h'],
])
},
},
alcProcessContext: function(context) {},
alcSuspendContext: function(context) {},
alcMakeContextCurrent: function(context) {
if (context == 0) {
AL.currentContext = null;
} else {
AL.currentContext = AL.contexts[context - 1];
}
},
alcDestroyContext: function(context) {
// Stop playback, etc
},
alcCloseDevice: function(device) {
// Stop playback, etc
},
alcOpenDevice: function(deviceName) {
if (typeof(AudioContext) == "function" ||
typeof(webkitAudioContext) == "function") {
return 1; // non-null pointer -- we just simulate one device
} else {
return 0;
}
},
alcCreateContext: function(device, attrList) {
if (device != 1) {
return 0;
}
if (attrList) {
console.log("The attrList argument of alcCreateContext is not supported yet");
return 0;
}
var ctx;
try {
ctx = new AudioContext();
} catch (e) {
try {
ctx = new webkitAudioContext();
} catch (e) {}
}
if (ctx) {
AL.contexts.push({ctx: ctx, err: 0, src: [], buf: []});
return AL.contexts.length;
} else {
return 0;
}
},
alGetError: function() {
if (!AL.currentContext) {
return 0xA004 /* AL_INVALID_OPERATION */;
} else {
return AL.currentContext.err;
}
},
alGenSources: function(count, sources) {
if (!AL.currentContext) {
console.error("alGenSources called without a valid context");
return;
}
for (var i = 0; i < count; ++i) {
var src = AL.currentContext.ctx.createBufferSource();
var gain = AL.currentContext.ctx.createGain();
var panner = AL.currentContext.ctx.createPanner();
src.connect(gain);
if (typeof(webkitAudioContext) == 'function') {
gain.connect(panner);
panner.connect(AL.currentContext.ctx.destination);
} else {
// Work around a Firefox bug (bug 849916)
gain.connect(AL.currentContext.ctx.destination);
}
gain.gain.value = 1; // work around a Firefox bug (bug 850970)
AL.currentContext.src.push({src: src, gain: gain, panner: panner});
{{{ makeSetValue('sources', 'i', 'AL.currentContext.src.length', 'i32') }}};
}
},
alSourcei: function(source, param, value) {
if (!AL.currentContext) {
console.error("alSourcei called without a valid context");
return;
}
if (source > AL.currentContext.src.length) {
console.error("alSourcei called with an invalid source");
return;
}
switch (param) {
case 0x1007 /* AL_LOOPING */:
AL.currentContext.src[source - 1].src.loop = (value != 0 /* AL_FALSE */);
break;
case 0x1009 /* AL_BUFFER */:
if (value == 0) {
AL.currentContext.src[source - 1].src.buffer = null;
} else {
AL.currentContext.src[source - 1].src.buffer = AL.currentContext.buf[value - 1].buf;
}
break;
default:
console.log("alSourcei with param " + param + " not implemented yet");
break;
}
},
alSourcef: function(source, param, value) {
if (!AL.currentContext) {
consoue.error("alSourcef called without a valid context");
return;
}
if (source > AL.currentContext.src.length) {
console.error("alSourcef called with an invalid source");
return;
}
switch (param) {
case 0x100A /* AL_GAIN */:
AL.currentContext.src[source - 1].gain.gain.value = value;
break;
case 0x1003 /* AL_PITCH */:
console.log("alSourcef was called with AL_PITCH, but Web Audio does not support static pitch changes");
break;
default:
console.log("alSourcef with param " + param + " not implemented yet");
break;
}
},
alSourcefv: function(source, param, value) {
if (!AL.currentContext) {
consoue.error("alSourcefv called without a valid context");
return;
}
if (source > AL.currentContext.src.length) {
console.error("alSourcefv called with an invalid source");
return;
}
switch (param) {
case 0x1004 /* AL_POSITION */:
AL.currentContext.src[source - 1].panner.setPosition(
{{{ makeGetValue('value', '0', 'float') }}},
{{{ makeGetValue('value', '1', 'float') }}},
{{{ makeGetValue('value', '2', 'float') }}}
);
break;
case 0x1006 /* AL_VELOCITY */:
AL.currentContext.src[source - 1].panner.setVelocity(
{{{ makeGetValue('value', '0', 'float') }}},
{{{ makeGetValue('value', '1', 'float') }}},
{{{ makeGetValue('value', '2', 'float') }}}
);
break;
default:
console.log("alSourcefv with param " + param + " not implemented yet");
break;
}
},
alSourceQueueBuffers: function(source, count, buffers) {
if (!AL.currentContext) {
console.error("alSourceQueueBuffers called without a valid context");
return;
}
if (source > AL.currentContext.src.length) {
console.error("alSourceQueueBuffers called with an invalid source");
return;
}
if (count != 1) {
console.error("Queuing multiple buffers using alSourceQueueBuffers is not supported yet");
return;
}
for (var i = 0; i < count; ++i) {
var buffer = {{{ makeGetValue('buffers', 'i', 'i32') }}};
if (buffer > AL.currentContext.buf.length) {
console.error("alSourceQueueBuffers called with an invalid buffer");
return;
}
AL.currentCOntext.src[source].src.buffer = AL.currentContext.buf[buffer - 1].buf;
}
},
alGenBuffers: function(count, buffers) {
if (!AL.currentContext) {
console.error("alGenBuffers called without a valid context");
return;
}
for (var i = 0; i < count; ++i) {
AL.currentContext.buf.push({buf: null});
{{{ makeSetValue('buffers', 'i', 'AL.currentContext.buf.length', 'i32') }}};
}
},
alBufferData: function(buffer, format, data, size, freq) {
if (!AL.currentContext) {
console.error("alBufferData called without a valid context");
return;
}
if (buffer > AL.currentContext.buf.length) {
console.error("alBufferData called with an invalid buffer");
return;
}
var channels, bytes;
switch (format) {
case 0x1100 /* AL_FORMAT_MONO8 */:
bytes = 1;
channels = 1;
break;
case 0x1101 /* AL_FORMAT_MONO16 */:
bytes = 2;
channels = 1;
break;
case 0x1102 /* AL_FORMAT_STEREO8 */:
bytes = 1;
channels = 2;
break;
case 0x1103 /* AL_FORMAT_STEREO16 */:
bytes = 2;
channels = 2;
break;
default:
console.error("alBufferData called with invalid format " + format);
return;
}
AL.currentContext.buf[buffer - 1].buf = AL.currentContext.ctx.createBuffer(channels, size / (bytes * channels), freq);
var buf = new Array(channels);
for (var i = 0; i < channels; ++i) {
buf[i] = AL.currentContext.buf[buffer - 1].buf.getChannelData(i);
}
for (var i = 0; i < size / (bytes * channels); ++i) {
for (var j = 0; j < channels; ++j) {
switch (bytes) {
case 1:
var val = {{{ makeGetValue('data', 'i*channels+j', 'i8') }}};
buf[j][i] = -1.0 + val * (2/256);
break;
case 2:
var val = {{{ makeGetValue('data', '2*(i*channels+j)', 'i16') }}};
buf[j][i] = val/32768;
break;
}
}
}
},
alSourcePlay: function(source) {
if (!AL.currentContext) {
console.error("alSourceQueueBuffers called without a valid context");
return;
}
if (source > AL.currentContext.src.length) {
console.error("alSourceQueueBuffers called with an invalid source");
return;
}
AL.currentContext.src[source - 1].src.start(0);
},
alDistanceModel: function(model) {
if (model != 0 /* AL_NONE */) {
console.log("Only alDistanceModel(AL_NONE) is currently supported");
}
},
alListenerfv: function(param, values) {
console.log("alListenerfv is not supported yet");
},
alIsExtensionPresent: function(extName) {
return 0;
},
alcIsExtensionPresent: function(device, extName) {
return 0;
},
alGetProcAddress: function(fname) {
return 0;
},
alcGetProcAddress: function(device, fname) {
return 0;
},
};
autoAddDeps(LibraryOpenAL, '$AL');
mergeInto(LibraryManager.library, LibraryOpenAL);
|
