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RetroArch/emscripten/library_rwebcam.js

286 lines
12 KiB
JavaScript
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//"use strict";
var LibraryRWebCam = {
$RWC: {
RETRO_CAMERA_BUFFER_OPENGL_TEXTURE: 0,
RETRO_CAMERA_BUFFER_RAW_FRAMEBUFFER: 1,
tmp: null,
contexts: [],
counter: 0
},
$RWebCamReady: function(c) {
try {
/* try to start video it was paused */
if (RWC.contexts[c].videoElement.paused) RWC.contexts[c].videoElement.play();
} catch (e) {}
return RWC.contexts[c].cameraRunning && !RWC.contexts[c].videoElement.paused && RWC.contexts[c].videoElement.videoWidth != 0 && RWC.contexts[c].videoElement.videoHeight != 0;
},
$RWebCamInitBrowser__proxy: "sync",
$RWebCamInitBrowser: function(width, height, glTex, rawFb, debug, proxied) {
if (!navigator?.mediaDevices?.getUserMedia) return 0;
var c = ++RWC.counter;
RWC.contexts[c] = {width: width, height: height, glTex: glTex, rawFb: rawFb, debug: debug, proxied: proxied, idealWidth: width, idealHeight: height};
return c;
},
RWebCamInit__deps: ["malloc", "$RWebCamInitBrowser"],
RWebCamInit: function(caps, width, height, debug) {
var glTex = Number(caps) & (1 << RWC.RETRO_CAMERA_BUFFER_OPENGL_TEXTURE);
var rawFb = Number(caps) & (1 << RWC.RETRO_CAMERA_BUFFER_RAW_FRAMEBUFFER);
var proxied = typeof ENVIRONMENT_IS_PTHREAD != "undefined" && ENVIRONMENT_IS_PTHREAD;
var c = RWebCamInitBrowser(width, height, glTex, rawFb, debug, proxied);
if (!c) return 0;
if (debug) console.log("RWebCamInit", c);
if (proxied) {
RWC.contexts[c] = {};
RWC.contexts[c].debug = debug;
RWC.contexts[c].glTex = glTex;
RWC.contexts[c].rawFb = rawFb;
RWC.contexts[c].proxied = true;
}
/* for getting/storing texture id in GL mode */
if (!RWC.tmp) RWC.tmp = _malloc(4);
return c;
},
$RWebCamFreeBrowser__proxy: "sync",
$RWebCamFreeBrowser: function(c) {
RWC.contexts[c] = null;
},
RWebCamFree__deps: ["$RWebCamFreeBrowser", "RWebCamStop"],
RWebCamFree: function(c) {
if (RWC.contexts[c].debug) console.log("RWebCamFree", c);
if (RWC.contexts[c].running) _RWebCamStop(c); /* need more checks in RA */
if (RWC.contexts[c].proxied) RWC.contexts[c] = null;
RWebCamFreeBrowser(c);
},
$RWebCamStartBrowser__proxy: "sync",
$RWebCamStartBrowser: function(c) {
RWC.contexts[c].videoElement = document.createElement("video");
RWC.contexts[c].videoElement.classList.add("retroarchWebcamVideo");
if (RWC.contexts[c].debug) document.body.appendChild(RWC.contexts[c].videoElement);
if (RWC.contexts[c].rawFb || RWC.contexts[c].proxied) {
RWC.contexts[c].rawFbCanvas = document.createElement("canvas");
RWC.contexts[c].rawFbCanvas.classList.add("retroarchWebcamCanvas");
if (RWC.contexts[c].debug) document.body.appendChild(RWC.contexts[c].rawFbCanvas);
}
var videoOpts = true;
if (RWC.contexts[c].idealWidth && RWC.contexts[c].idealHeight) {
/* save us some cropping/scaling, only honored by some browsers */
videoOpts = {width: RWC.contexts[c].idealWidth, height: RWC.contexts[c].idealHeight, aspectRatio: RWC.contexts[c].idealWidth / RWC.contexts[c].idealHeight};
}
navigator.mediaDevices.getUserMedia({audio: false, video: videoOpts}).then(function(stream) {
if (!RWC.contexts[c]?.running) {
/* too late */
for (var track of stream.getVideoTracks()) {
track.stop();
}
return;
}
RWC.contexts[c].videoElement.autoplay = true;
RWC.contexts[c].videoElement.srcObject = stream;
RWC.contexts[c].cameraRunning = true;
}).catch(function(e) {
console.log("[rwebcam] webcam request failed", e);
});
RWC.contexts[c].running = true;
},
RWebCamStart__deps: ["glGenTextures", "glBindTexture", "glGetIntegerv", "glTexParameteri", "malloc", "$RWebCamStartBrowser"],
RWebCamStart: function(c) {
if (RWC.contexts[c].debug) console.log("RWebCamStart", c);
if (RWC.contexts[c].running) return;
if (RWC.contexts[c].glTex) {
_glGenTextures(1, RWC.tmp);
RWC.contexts[c].glTexId = {{{ makeGetValue('RWC.tmp', 0, 'i32') }}};
if (RWC.contexts[c].glTexId !== 0) {
/* save previous texture */
_glGetIntegerv(0x8069 /* GL_TEXTURE_BINDING_2D */, RWC.tmp);
var prev = {{{ makeGetValue('RWC.tmp', 0, 'i32') }}};
_glBindTexture(0x0DE1 /* GL_TEXTURE_2D */, RWC.contexts[c].glTexId);
/* NPOT textures in WebGL must have these filters and clamping settings */
_glTexParameteri(0x0DE1 /* GL_TEXTURE_2D */, 0x2800 /* GL_TEXTURE_MAG_FILTER */, 0x2601 /* GL_LINEAR */);
_glTexParameteri(0x0DE1 /* GL_TEXTURE_2D */, 0x2801 /* GL_TEXTURE_MIN_FILTER */, 0x2601 /* GL_LINEAR */);
_glTexParameteri(0x0DE1 /* GL_TEXTURE_2D */, 0x2802 /* GL_TEXTURE_WRAP_S */, 0x812F /* GL_CLAMP_TO_EDGE */);
_glTexParameteri(0x0DE1 /* GL_TEXTURE_2D */, 0x2803 /*GL_TEXTURE_WRAP_T */, 0x812F /* GL_CLAMP_TO_EDGE */);
_glBindTexture(0x0DE1 /* GL_TEXTURE_2D */, prev);
RWC.contexts[c].glFirstFrame = true;
}
}
RWebCamStartBrowser(c);
RWC.contexts[c].running = true;
return 1;
},
$RWebCamStopBrowser__proxy: "sync",
$RWebCamStopBrowser: function(c) {
if (RWC.contexts[c].debug && RWC.contexts[c].rawFbCanvas) document.body.removeChild(RWC.contexts[c].rawFbCanvas);
RWC.contexts[c].rawFbCanvasCtx = null;
RWC.contexts[c].rawFbCanvas = null;
RWC.contexts[c].videoElement.pause();
if (RWC.contexts[c].cameraRunning) {
for (var track of RWC.contexts[c].videoElement.srcObject.getVideoTracks()) {
track.stop();
}
}
if (RWC.contexts[c].debug) document.body.removeChild(RWC.contexts[c].videoElement);
RWC.contexts[c].videoElement = null;
RWC.contexts[c].running = false;
},
RWebCamStop__deps: ["free", "glDeleteTextures", "$RWebCamStopBrowser"],
RWebCamStop: function(c) {
if (RWC.contexts[c].debug) console.log("RWebCamStop", c);
if (!RWC.contexts[c].running) return;
if (RWC.contexts[c].glTexId) {
_glDeleteTextures(1, RWC.contexts[c].glTexId);
}
if (RWC.contexts[c].rawBuffer) {
_free(RWC.contexts[c].rawBuffer);
RWC.contexts[c].rawBuffer = 0;
}
RWebCamStopBrowser(c);
RWC.contexts[c].running = false;
},
$RWebCamCheckDimensions: function(c) {
if (!RWC.contexts[c].width) RWC.contexts[c].width = RWC.contexts[c].videoElement.videoWidth;
if (!RWC.contexts[c].height) RWC.contexts[c].height = RWC.contexts[c].videoElement.videoHeight;
},
$RWebCamStoreDimensions__proxy: "sync",
$RWebCamStoreDimensions__deps: ["$RWebCamReady", "$RWebCamCheckDimensions"],
$RWebCamStoreDimensions: function(c, ptr) {
if (!RWebCamReady(c)) return 0;
RWebCamCheckDimensions(c);
{{{ makeSetValue('ptr', 0, 'RWC.contexts[c].width', 'i32') }}};
{{{ makeSetValue('ptr', 4, 'RWC.contexts[c].height', 'i32') }}};
return 1;
},
$RWebCamGetImageData__deps: ["$RWebCamReady"],
$RWebCamGetImageData: function(c) {
if (!RWebCamReady(c)) return 0;
if (!RWC.contexts[c].rawFbCanvasCtx) {
RWC.contexts[c].rawFbCanvas.width = RWC.contexts[c].width;
RWC.contexts[c].rawFbCanvas.height = RWC.contexts[c].height;
RWC.contexts[c].rawFbCanvasCtx = RWC.contexts[c].rawFbCanvas.getContext("2d", {willReadFrequently: true});
}
/* crop to desired aspect ratio if necessary */
var oldAspect = RWC.contexts[c].videoElement.videoWidth / RWC.contexts[c].videoElement.videoHeight;
var newAspect = RWC.contexts[c].rawFbCanvas.width / RWC.contexts[c].rawFbCanvas.height;
var width = RWC.contexts[c].videoElement.videoWidth;
var height = RWC.contexts[c].videoElement.videoHeight;
var offsetX = 0;
var offsetY = 0;
if (oldAspect > newAspect) {
width = height * newAspect;
offsetX = (RWC.contexts[c].videoElement.videoWidth - width) / 2;
} else if (oldAspect < newAspect) {
height = width / newAspect;
offsetY = (RWC.contexts[c].videoElement.videoHeight - height) / 2;
}
RWC.contexts[c].rawFbCanvasCtx.drawImage(RWC.contexts[c].videoElement,
offsetX, offsetY, width, height,
0, 0, RWC.contexts[c].rawFbCanvas.width, RWC.contexts[c].rawFbCanvas.height);
return RWC.contexts[c].rawFbCanvasCtx.getImageData(0, 0, RWC.contexts[c].rawFbCanvas.width, RWC.contexts[c].rawFbCanvas.height).data;
},
$RWebCamStoreImageData__proxy: "sync",
$RWebCamStoreImageData__deps: ["$RWebCamGetImageData"],
$RWebCamStoreImageData: function(c, ptr) {
var data = RWebCamGetImageData(c);
if (!data) return 0;
HEAPU8.set(data, ptr);
return 1;
},
RWebCamPoll__deps: ["$RWebCamReady", "glBindTexture", "glGetIntegerv", "malloc", "free", "$RWebCamStoreDimensions", "$RWebCamCheckDimensions", "$RWebCamStoreImageData"],
RWebCamPoll: function(c, frame_raw_cb, frame_gl_cb) {
if (RWC.contexts[c].debug) console.log("RWebCamPoll", c, RWC.contexts[c].proxied, RWC.contexts[c].rawBuffer, RWC.contexts[c].running);
if (!RWC.contexts[c].running) return 0; /* need more checks in RA */
var ret = 0;
if ((RWC.contexts[c].rawFb && frame_raw_cb !== 0) || RWC.contexts[c].proxied) {
if (!RWC.contexts[c].rawBuffer) {
if (RWC.contexts[c].proxied) {
/* pull dimensions into this thread */
var dimensions = _malloc(8);
var res = RWebCamStoreDimensions(c, dimensions); /* also checks ready(c) */
if (!res) {
_free(dimensions);
return 0;
}
RWC.contexts[c].width = {{{ makeGetValue('dimensions', 0, 'i32') }}};
RWC.contexts[c].height = {{{ makeGetValue('dimensions', 4, 'i32') }}};
_free(dimensions);
RWC.contexts[c].length = RWC.contexts[c].width * RWC.contexts[c].height * 4;
} else {
if (!RWebCamReady(c)) return 0;
RWebCamCheckDimensions(c);
}
RWC.contexts[c].rawBuffer = _malloc(RWC.contexts[c].width * RWC.contexts[c].height * 4 + 1);
}
/* store at +1 so we can read data as XRGB */
if (!RWebCamStoreImageData(c, RWC.contexts[c].rawBuffer + 1)) return 0;
}
if (RWC.contexts[c].glTexId !== 0 && frame_gl_cb !== 0) {
var imageSrcGL;
if (RWC.contexts[c].proxied) {
imageSrcGL = HEAPU8.subarray(RWC.contexts[c].rawBuffer + 1, RWC.contexts[c].rawBuffer + RWC.contexts[c].length + 1);
} else {
if (!RWebCamReady(c)) return 0;
imageSrcGL = RWC.contexts[c].videoElement;
}
_glGetIntegerv(0x8069 /* GL_TEXTURE_BINDING_2D */, RWC.tmp);
var prev = {{{ makeGetValue('RWC.tmp', 0, 'i32') }}};
_glBindTexture(0x0DE1 /* GL_TEXTURE_2D */, RWC.contexts[c].glTexId);
if (RWC.contexts[c].glFirstFrame) {
if (RWC.contexts[c].proxied)
Module.ctx.texImage2D(Module.ctx.TEXTURE_2D, 0, Module.ctx.RGBA, RWC.contexts[c].width, RWC.contexts[c].height, 0, Module.ctx.RGBA, Module.ctx.UNSIGNED_BYTE, imageSrcGL);
else
Module.ctx.texImage2D(Module.ctx.TEXTURE_2D, 0, Module.ctx.RGB, Module.ctx.RGB, Module.ctx.UNSIGNED_BYTE, imageSrcGL);
RWC.contexts[c].glFirstFrame = false;
} else {
if (RWC.contexts[c].proxied)
Module.ctx.texSubImage2D(Module.ctx.TEXTURE_2D, 0, 0, 0, RWC.contexts[c].width, RWC.contexts[c].height, Module.ctx.RGBA, Module.ctx.UNSIGNED_BYTE, imageSrcGL);
else
Module.ctx.texSubImage2D(Module.ctx.TEXTURE_2D, 0, 0, 0, Module.ctx.RGB, Module.ctx.UNSIGNED_BYTE, imageSrcGL);
}
_glBindTexture(0x0DE1 /* GL_TEXTURE_2D */, prev);
{{{ makeDynCall('viip', 'frame_gl_cb') }}}(RWC.contexts[c].glTexId, 0x0DE1 /* GL_TEXTURE_2D */, 0);
ret = 1;
}
if (RWC.contexts[c].rawFb && frame_raw_cb !== 0)
{
{{{ makeDynCall('vpiii', 'frame_raw_cb') }}}(RWC.contexts[c].rawBuffer, RWC.contexts[c].width, RWC.contexts[c].height, RWC.contexts[c].width * 4);
ret = 1;
}
return ret;
}
};
autoAddDeps(LibraryRWebCam, '$RWC');
addToLibrary(LibraryRWebCam);
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