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1 lines
5.7 KiB
1 lines
5.7 KiB
var MP4Remux=function(){function a(){for(var a in c)c[a]=[a.charCodeAt(0),a.charCodeAt(1),a.charCodeAt(2),a.charCodeAt(3)];b=0,d.FTYP=new Uint8Array([105,115,111,109,0,0,0,1,105,115,111,109,97,118,99,49]),d.STSD_PREFIX=new Uint8Array([0,0,0,0,0,0,0,1]),d.STTS=new Uint8Array([0,0,0,0,0,0,0,0]),d.STSC=d.STCO=d.STTS,d.STSZ=new Uint8Array([0,0,0,0,0,0,0,0,0,0,0,0]),d.HDLR_VIDEO=new Uint8Array([0,0,0,0,0,0,0,0,118,105,100,101,0,0,0,0,0,0,0,0,0,0,0,0,86,105,100,101,111,72,97,110,100,108,101,114,0]),d.HDLR_AUDIO=new Uint8Array([0,0,0,0,0,0,0,0,115,111,117,110,0,0,0,0,0,0,0,0,0,0,0,0,83,111,117,110,100,72,97,110,100,108,101,114,0]),d.DREF=new Uint8Array([0,0,0,0,0,0,0,1,0,0,0,12,117,114,108,32,0,0,0,1]),d.SMHD=new Uint8Array([0,0,0,0,0,0,0,0]),d.VMHD=new Uint8Array([0,0,0,1,0,0,0,0,0,0,0,0])}var b,c=[],d={};c={avc1:[],avcC:[],btrt:[],dinf:[],dref:[],esds:[],ftyp:[],hdlr:[],mdat:[],mdhd:[],mdia:[],mfhd:[],minf:[],moof:[],moov:[],mp4a:[],mvex:[],mvhd:[],sdtp:[],stbl:[],stco:[],stsc:[],stsd:[],stsz:[],stts:[],tfdt:[],tfhd:[],traf:[],trak:[],trun:[],trex:[],tkhd:[],vmhd:[],smhd:[]};var e=function(a){for(var b=8,c=Array.prototype.slice.call(arguments,1),d=0;d<c.length;d++)b+=c[d].byteLength;var e=new Uint8Array(b),f=0;e[f++]=b>>>24&255,e[f++]=b>>>16&255,e[f++]=b>>>8&255,e[f++]=255&b,e.set(a,f),f+=4;for(var d=0;d<c.length;d++)e.set(c[d],f),f+=c[d].byteLength;return e},f=function(a){var b=a.config,d=b.length,f=new Uint8Array([0,0,0,0,3,23+d,0,1,0,4,15+d,64,21,0,0,0,0,0,0,0,0,0,0,0,5].concat([d]).concat(b).concat([6,1,2]));return e(c.esds,f)},g=function(a){return e(c.mp4a,new Uint8Array([0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,(65280&a.channelcount)>>8,255&a.channelcount,(65280&a.samplesize)>>8,255&a.samplesize,0,0,0,0,(65280&a.samplerate)>>8,255&a.samplerate,0,0]),f(a))},h=function(a){var b=a.sps||[],d=a.pps||[],f=[],g=[],h=0;for(h=0;h<b.length;h++)f.push((65280&b[h].byteLength)>>>8),f.push(255&b[h].byteLength),f=f.concat(Array.prototype.slice.call(b[h]));for(h=0;h<d.length;h++)g.push((65280&d[h].byteLength)>>>8),g.push(255&d[h].byteLength),g=g.concat(Array.prototype.slice.call(d[h]));return e(c.avc1,new Uint8Array([0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,(65280&a.width)>>8,255&a.width,(65280&a.height)>>8,255&a.height,0,72,0,0,0,72,0,0,0,0,0,0,0,1,19,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,24,17,17]),e(c.avcC,new Uint8Array([1,a.profileIdc,a.profileCompatibility,a.levelIdc,255].concat([b.length]).concat(f).concat([d.length]).concat(g))))},i=function(a){return"audio"===a.type?e(c.stsd,d.STSD_PREFIX,g(a)):e(c.stsd,d.STSD_PREFIX,h(a))},j=function(){return e(c.dinf,e(c.dref,d.DREF))},k=function(a){var b=e(c.stbl,i(a),e(c.stts,d.STTS),e(c.stsc,d.STSC),e(c.stsz,d.STSZ),e(c.stco,d.STCO));return b},l=function(a){var b=a.timescale,d=a.duration;return e(c.mdhd,new Uint8Array([0,0,0,0,0,0,0,0,0,0,0,0,b>>>24&255,b>>>16&255,b>>>8&255,255&b,d>>>24&255,d>>>16&255,d>>>8&255,255&d,85,196,0,0]))},m=function(a){var b=null;return b="audio"===a.type?d.HDLR_AUDIO:d.HDLR_VIDEO,e(c.hdlr,b)},n=function(a){var b=null;return b="audio"===a.type?e(c.smhd,d.SMHD):e(c.vmhd,d.VMHD),e(c.minf,b,j(),k(a))},o=function(a){var b=a.id,d=a.duration,f=a.width,g=a.height;return e(c.tkhd,new Uint8Array([0,0,0,7,0,0,0,0,0,0,0,0,b>>>24&255,b>>>16&255,b>>>8&255,255&b,0,0,0,0,d>>>24&255,d>>>16&255,d>>>8&255,255&d,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,64,0,0,0,f>>>8&255,255&f,0,0,g>>>8&255,255&g,0,0]))},p=function(a){return e(c.mdia,l(a),m(a),n(a))},q=function(a){var b=a.id,d=new Uint8Array([0,0,0,0,b>>>24&255,b>>>16&255,b>>>8&255,255&b,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,1]);return e(c.trex,d)},r=function(a,b){return debug.log("mvhd: timescale: "+a+" duration: "+b),e(c.mvhd,new Uint8Array([0,0,0,0,0,0,0,0,0,0,0,0,a>>>24&255,a>>>16&255,a>>>8&255,255&a,b>>>24&255,b>>>16&255,b>>>8&255,255&b,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,64,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,255,255,255,255]))},s=function(a){return e(c.trak,o(a),p(a))},t=function(a){return e(c.mvex,q(a))},u=function(a){var b=r(a.timescale,a.duration),d=s(a),f=t(a);return e(c.moov,b,d,f)},v=function(a,b){return[0,0,3,5,(4278190080&a.length)>>>24,(16711680&a.length)>>>16,(65280&a.length)>>>8,255&a.length,(4278190080&b)>>>24,(16711680&b)>>>16,(65280&b)>>>8,255&b,0,0,0,0]},w=function(a,b){var d=null,f=null,g=null,h=0,i=b;if(f=a.samples||[],null===f[0].frameDuration)for(i+=24+4*f.length,d=trunHeader(f,i),h=0;h<f.length;h++)g=f[h],d=d.concat([(4278190080&g.size)>>>24,(16711680&g.size)>>>16,(65280&g.size)>>>8,255&g.size]);else for(i+=24+4*f.length+4*f.length,d=v(f,i),h=0;h<f.length;h++)g=f[h],d=d.concat([(4278190080&g.frameDuration)>>>24,(16711680&g.frameDuration)>>>16,(65280&g.frameDuration)>>>8,255&g.frameDuration,(4278190080&g.size)>>>24,(16711680&g.size)>>>16,(65280&g.size)>>>8,255&g.size]);return e(c.trun,new Uint8Array(d))},x=function(a,b){return"audio"===a.type?audioTrun(a,b):w(a,b)},y=function(a){var b=new Uint8Array([0,0,0,0,a>>>24&255,a>>>16&255,a>>>8&255,255&a]);return e(c.mfhd,b)},z=function(a){var b=null,d=null,f=null,g=null;return b=e(c.tfhd,new Uint8Array([0,2,0,0,0,0,0,1])),d=e(c.tfdt,new Uint8Array([0,0,0,0,a.baseMediaDecodeTime>>>24&255,a.baseMediaDecodeTime>>>16&255,a.baseMediaDecodeTime>>>8&255,255&a.baseMediaDecodeTime])),g=72,f=x(a,g),e(c.traf,b,d,f)},A=function(a,b){return e(c.moof,y(a),z(b))},B=function(a){return e(c.mdat,a)};return a.prototype={initSegment:function(a){var b=e(c.ftyp,d.FTYP);debug.log(a);var f=u(a),g=new Uint8Array(b.byteLength+f.byteLength);return g.set(b,0),g.set(f,b.byteLength),g},mediaSegment:function(a,b,c){var d=A(a,b),e=B(c),f=null;return f=new Uint8Array(d.byteLength+e.byteLength),f.set(d),f.set(e,d.byteLength),f}},new a},mp4Remux=new MP4Remux;
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