@diffusionstudio/core-v4/dist/core.es.js

A fast, browser based video compositing engine powered by WebCodecs

/*!
 * @diffusionstudio/core-v4 v4.0.2
 * Copyright (c) 2025 Diffusion Studio Inc.
 * 
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/.
 */

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if(e.decoderConfig.codec.startsWith("vp09")){if(!Rt.test(e.decoderConfig.codec))throw new TypeError('Video chunk metadata decoder configuration codec string for VP9 must be a valid VP9 codec string as specified in Section "Codecs Parameter String" of https://www.webmproject.org/vp9/mp4/.')}else if(e.decoderConfig.codec.startsWith("av01")&&!zt.test(e.decoderConfig.codec))throw new TypeError('Video chunk metadata decoder configuration codec string for AV1 must be a valid AV1 codec string as specified in Section "Codecs Parameter String" of https://aomediacodec.github.io/av1-isobmff/.')},Ut=["mp4a","mp3","opus","vorbis","flac","ulaw","alaw","pcm"],Lt=e=>{if(!e)throw new TypeError("Audio chunk metadata must be provided.");if("object"!=typeof e)throw new TypeError("Audio chunk metadata must be an object.");if(!e.decoderConfig)throw new TypeError("Audio chunk metadata must include a decoder configuration.");if("object"!=typeof e.decoderConfig)throw new TypeError("Audio chunk metadata decoder 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ArrayBuffer view.");if(e.decoderConfig.codec.startsWith("mp4a")&&"mp4a.69"!==e.decoderConfig.codec&&"mp4a.6B"!==e.decoderConfig.codec&&"mp4a.6b"!==e.decoderConfig.codec){if(!["mp4a.40.2","mp4a.40.02","mp4a.40.5","mp4a.40.05","mp4a.40.29","mp4a.67"].includes(e.decoderConfig.codec))throw new TypeError("Audio chunk metadata decoder configuration codec string for AAC must be a valid AAC codec string as specified in https://www.w3.org/TR/webcodecs-aac-codec-registration/.");if(!e.decoderConfig.description)throw new TypeError("Audio chunk metadata decoder configuration for AAC must include a description, which is expected to be an AudioSpecificConfig as specified in ISO 14496-3.")}else if(e.decoderConfig.codec.startsWith("mp3")||e.decoderConfig.codec.startsWith("mp4a")){if("mp3"!==e.decoderConfig.codec&&"mp4a.69"!==e.decoderConfig.codec&&"mp4a.6B"!==e.decoderConfig.codec&&"mp4a.6b"!==e.decoderConfig.codec)throw new TypeError('Audio chunk metadata decoder configuration codec string for MP3 must be "mp3", "mp4a.69" or "mp4a.6B".')}else if(e.decoderConfig.codec.startsWith("opus")){if("opus"!==e.decoderConfig.codec)throw new TypeError('Audio chunk metadata decoder configuration codec string for Opus must be "opus".');if(e.decoderConfig.description&&e.decoderConfig.description.byteLength<18)throw new TypeError("Audio chunk metadata decoder configuration description, when specified, is expected to be an Identification Header as specified in Section 5.1 of RFC 7845.")}else if(e.decoderConfig.codec.startsWith("vorbis")){if("vorbis"!==e.decoderConfig.codec)throw new TypeError('Audio chunk metadata decoder configuration codec string for Vorbis must be "vorbis".');if(!e.decoderConfig.description)throw new TypeError("Audio chunk metadata decoder configuration for Vorbis must include a description, which is expected to adhere to the format described in https://www.w3.org/TR/webcodecs-vorbis-codec-registration/.")}else if(e.decoderConfig.codec.startsWith("flac")){if("flac"!==e.decoderConfig.codec)throw new TypeError('Audio chunk metadata decoder configuration codec string for FLAC must be "flac".');const t=42;if(!e.decoderConfig.description||e.decoderConfig.description.byteLength<t)throw new TypeError("Audio chunk metadata decoder configuration for FLAC must include a description, which is expected to adhere to the format described in https://www.w3.org/TR/webcodecs-flac-codec-registration/.")}else if((e.decoderConfig.codec.startsWith("pcm")||e.decoderConfig.codec.startsWith("ulaw")||e.decoderConfig.codec.startsWith("alaw"))&&!ht.includes(e.decoderConfig.codec))throw new TypeError(`Audio chunk metadata decoder configuration codec string for PCM must be one of the supported PCM codecs (${ht.join(", ")}).`)},Vt=e=>{if(!e)throw new TypeError("Subtitle metadata must be provided.");if("object"!=typeof e)throw new TypeError("Subtitle metadata must be an object.");if(!e.config)throw new TypeError("Subtitle metadata must include a config object.");if("object"!=typeof e.config)throw new TypeError("Subtitle metadata config must be an object.");if("string"!=typeof e.config.description)throw new TypeError("Subtitle metadata config description must be a string.")};class Wt{constructor(e){this.mutex=new Ce,this.firstMediaStreamTimestamp=null,this.trackTimestampInfo=new WeakMap,this.output=e}onTrackClose(e){}validateAndNormalizeTimestamp(e,t,i){t+=e.source._timestampOffset;let r=this.trackTimestampInfo.get(e);if(!r){if(!i)throw new Error("First packet must be a key packet.");r={maxTimestamp:t,maxTimestampBeforeLastKeyPacket:t},this.trackTimestampInfo.set(e,r)}if(t<0)throw new Error(`Timestamps must be non-negative (got ${t}s).`);if(i&&(r.maxTimestampBeforeLastKeyPacket=r.maxTimestamp),t<r.maxTimestampBeforeLastKeyPacket)throw new Error(`Timestamps cannot be smaller than the largest timestamp of the previous GOP (a GOP begins with a key packet and ends right before the next key packet). Got ${t}s, but largest timestamp is ${r.maxTimestampBeforeLastKeyPacket}s.`);return r.maxTimestamp=Math.max(r.maxTimestamp,t),t}}var Ht,$t;!function(e){e[e.IDR=5]="IDR",e[e.SPS=7]="SPS",e[e.PPS=8]="PPS",e[e.SPS_EXT=13]="SPS_EXT"}(Ht||(Ht={})),function(e){e[e.RASL_N=8]="RASL_N",e[e.RASL_R=9]="RASL_R",e[e.BLA_W_LP=16]="BLA_W_LP",e[e.RSV_IRAP_VCL23=23]="RSV_IRAP_VCL23",e[e.VPS_NUT=32]="VPS_NUT",e[e.SPS_NUT=33]="SPS_NUT",e[e.PPS_NUT=34]="PPS_NUT",e[e.PREFIX_SEI_NUT=39]="PREFIX_SEI_NUT",e[e.SUFFIX_SEI_NUT=40]="SUFFIX_SEI_NUT"}($t||($t={}));const jt=e=>{const t=[];let i=0;for(;i<e.length;){let r=-1,a=0;for(let t=i;t<e.length-3;t++){if(0===e[t]&&0===e[t+1]&&1===e[t+2]){r=t,a=3;break}if(t<e.length-4&&0===e[t]&&0===e[t+1]&&0===e[t+2]&&1===e[t+3]){r=t,a=4;break}}if(-1===r)break;if(i>0&&r>i){const a=e.subarray(i,r);a.length>0&&t.push(a)}i=r+a}if(i<e.length){const r=e.subarray(i);r.length>0&&t.push(r)}return t},qt=(e,t)=>{const i=[];let r=0;const a=new DataView(e.buffer,e.byteOffset,e.byteLength);for(;r+t<=e.length;){let s;1===t?s=a.getUint8(r):2===t?s=a.getUint16(r,!1):3===t?s=Fe(a,r,!1):4===t?s=a.getUint32(r,!1):(Be(t),ie(!1)),r+=t;const n=e.subarray(r,r+s);i.push(n),r+=s}return i},Kt=e=>{const t=[],i=e.length;for(let r=0;r<i;r++)r+2<i&&0===e[r]&&0===e[r+1]&&3===e[r+2]?(t.push(0,0),r+=2):t.push(e[r]);return new Uint8Array(t)},Qt=e=>31&e[0],Xt=e=>{try{const t=jt(e),i=t.filter(e=>Qt(e)===Ht.SPS),r=t.filter(e=>Qt(e)===Ht.PPS),a=t.filter(e=>Qt(e)===Ht.SPS_EXT);if(0===i.length)return null;if(0===r.length)return null;const s=i[0],n=Gt(s);ie(null!==n);const o=100===n.profileIdc||110===n.profileIdc||122===n.profileIdc||144===n.profileIdc;return{configurationVersion:1,avcProfileIndication:n.profileIdc,profileCompatibility:n.constraintFlags,avcLevelIndication:n.levelIdc,lengthSizeMinusOne:3,sequenceParameterSets:i,pictureParameterSets:r,chromaFormat:o?n.chromaFormatIdc:null,bitDepthLumaMinus8:o?n.bitDepthLumaMinus8:null,bitDepthChromaMinus8:o?n.bitDepthChromaMinus8:null,sequenceParameterSetExt:o?a:null}}catch(t){return console.error("Error building AVC Decoder Configuration Record:",t),null}},Gt=e=>{try{const t=new ne(Kt(e));t.skipBits(1),t.skipBits(2);if(7!==t.readBits(5))return null;const i=t.readAlignedByte(),r=t.readAlignedByte(),a=t.readAlignedByte();oe(t);let s=null,n=null,o=null;if(100===i||110===i||122===i||244===i||44===i||83===i||86===i||118===i||128===i){s=oe(t),3===s&&t.skipBits(1),n=oe(t),o=oe(t),t.skipBits(1);if(t.readBits(1))for(let e=0;e<(3!==s?8:12);e++){if(t.readBits(1)){const i=e<6?16:64;let r=8,a=8;for(let e=0;e<i;e++){if(0!==a){a=(r+ce(t)+256)%256}r=0===a?r:a}}}}oe(t);const c=oe(t);if(0===c)oe(t);else if(1===c){t.skipBits(1),ce(t),ce(t);const e=oe(t);for(let i=0;i<e;i++)ce(t)}oe(t),t.skipBits(1),oe(t),oe(t);return{profileIdc:i,constraintFlags:r,levelIdc:a,frameMbsOnlyFlag:t.readBits(1),chromaFormatIdc:s,bitDepthLumaMinus8:n,bitDepthChromaMinus8:o}}catch(t){return console.error("Error parsing AVC SPS:",t),null}},Yt=(e,t)=>{if(t.description){const i=3&le(t.description)[21];return qt(e,i+1)}return jt(e)},Jt=e=>e[0]>>1&63,Zt=e=>{try{const t=jt(e),i=t.filter(e=>Jt(e)===$t.VPS_NUT),r=t.filter(e=>Jt(e)===$t.SPS_NUT),a=t.filter(e=>Jt(e)===$t.PPS_NUT),s=t.filter(e=>Jt(e)===$t.PREFIX_SEI_NUT||Jt(e)===$t.SUFFIX_SEI_NUT);if(0===r.length||0===a.length)return null;const n=r[0],o=new ne(Kt(n));o.skipBits(16),o.readBits(4);const c=o.readBits(3),l=o.readBits(1),{general_profile_space:h,general_tier_flag:d,general_profile_idc:u,general_profile_compatibility_flags:m,general_constraint_indicator_flags:p,general_level_idc:f}=ei(o,c);oe(o);const g=oe(o);3===g&&o.skipBits(1),oe(o),oe(o),o.readBits(1)&&(oe(o),oe(o),oe(o),oe(o));const k=oe(o),y=oe(o);oe(o);const w=o.readBits(1);for(let e=w?0:c;e<=c;e++)oe(o),oe(o),oe(o);oe(o),oe(o),oe(o),oe(o),oe(o),oe(o),o.readBits(1)&&o.readBits(1)&&ti(o),o.skipBits(1),o.skipBits(1),o.readBits(1)&&(o.skipBits(4),o.skipBits(4),oe(o),oe(o),o.skipBits(1));const b=oe(o);if(ii(o,b),o.readBits(1)){const e=oe(o);for(let t=0;t<e;t++)oe(o),o.skipBits(1)}o.skipBits(1),o.skipBits(1);let T=0;o.readBits(1)&&(T=ai(o,c));let C=0;if(a.length>0){const e=a[0],t=new ne(Kt(e));t.skipBits(16),oe(t),oe(t),t.skipBits(1),t.skipBits(1),t.skipBits(3),t.skipBits(1),t.skipBits(1),oe(t),oe(t),ce(t),t.skipBits(1),t.skipBits(1),t.readBits(1)&&oe(t),ce(t),ce(t),t.skipBits(1),t.skipBits(1),t.skipBits(1),t.skipBits(1);const i=t.readBits(1),r=t.readBits(1);C=i||r?i&&!r?2:!i&&r?3:0:0}const S=[...i.length?[{arrayCompleteness:1,nalUnitType:$t.VPS_NUT,nalUnits:i}]:[],...r.length?[{arrayCompleteness:1,nalUnitType:$t.SPS_NUT,nalUnits:r}]:[],...a.length?[{arrayCompleteness:1,nalUnitType:$t.PPS_NUT,nalUnits:a}]:[],...s.length?[{arrayCompleteness:1,nalUnitType:Jt(s[0]),nalUnits:s}]:[]];return{configurationVersion:1,generalProfileSpace:h,generalTierFlag:d,generalProfileIdc:u,generalProfileCompatibilityFlags:m,generalConstraintIndicatorFlags:p,generalLevelIdc:f,minSpatialSegmentationIdc:T,parallelismType:C,chromaFormatIdc:g,bitDepthLumaMinus8:k,bitDepthChromaMinus8:y,avgFrameRate:0,constantFrameRate:0,numTemporalLayers:c+1,temporalIdNested:l,lengthSizeMinusOne:3,arrays:S}}catch(t){return console.error("Error building HEVC Decoder Configuration Record:",t),null}},ei=(e,t)=>{const i=e.readBits(2),r=e.readBits(1),a=e.readBits(5);let s=0;for(let h=0;h<32;h++)s=s<<1|e.readBits(1);const n=new Uint8Array(6);for(let h=0;h<6;h++)n[h]=e.readBits(8);const o=e.readBits(8),c=[],l=[];for(let h=0;h<t;h++)c.push(e.readBits(1)),l.push(e.readBits(1));if(t>0)for(let h=t;h<8;h++)e.skipBits(2);for(let h=0;h<t;h++)c[h]&&e.skipBits(88),l[h]&&e.skipBits(8);return{general_profile_space:i,general_tier_flag:r,general_profile_idc:a,general_profile_compatibility_flags:s,general_constraint_indicator_flags:n,general_level_idc:o}},ti=e=>{for(let t=0;t<4;t++)for(let i=0;i<(3===t?2:6);i++){if(e.readBits(1)){const i=Math.min(64,1<<4+(t<<1));t>1&&ce(e);for(let t=0;t<i;t++)ce(e)}else oe(e)}},ii=(e,t)=>{const i=[];for(let r=0;r<t;r++)i[r]=ri(e,r,t,i)},ri=(e,t,i,r)=>{let a=0,s=0,n=0;if(0!==t&&(s=e.readBits(1)),s){if(t===i){n=t-(oe(e)+1)}else n=t-1;e.readBits(1),oe(e);const s=r[n]??0;for(let t=0;t<=s;t++){e.readBits(1)||e.readBits(1)}a=r[n]}else{const t=oe(e),i=oe(e);for(let r=0;r<t;r++)oe(e),e.readBits(1);for(let r=0;r<i;r++)oe(e),e.readBits(1);a=t+i}return a},ai=(e,t)=>{if(e.readBits(1)){255===e.readBits(8)&&(e.readBits(16),e.readBits(16))}if(e.readBits(1)&&e.readBits(1),e.readBits(1)&&(e.readBits(3),e.readBits(1),e.readBits(1)&&(e.readBits(8),e.readBits(8),e.readBits(8))),e.readBits(1)&&(oe(e),oe(e)),e.readBits(1),e.readBits(1),e.readBits(1),e.readBits(1)&&(oe(e),oe(e),oe(e),oe(e)),e.readBits(1)&&(e.readBits(32),e.readBits(32),e.readBits(1)&&oe(e),e.readBits(1)&&si(e,!0,t)),e.readBits(1)){e.readBits(1),e.readBits(1),e.readBits(1);const t=oe(e);return oe(e),oe(e),oe(e),oe(e),t}return 0},si=(e,t,i)=>{let r=!1,a=!1,s=!1;r=1===e.readBits(1),a=1===e.readBits(1),(r||a)&&(s=1===e.readBits(1),s&&(e.readBits(8),e.readBits(5),e.readBits(1),e.readBits(5)),e.readBits(4),e.readBits(4),s&&e.readBits(4),e.readBits(5),e.readBits(5),e.readBits(5));for(let n=0;n<=i;n++){let t=!0;1===e.readBits(1)||(t=1===e.readBits(1));let i=!1;t?oe(e):i=1===e.readBits(1);let n=1;if(!i){n=oe(e)+1}r&&ni(e,n,s),a&&ni(e,n,s)}},ni=(e,t,i)=>{for(let r=0;r<t;r++)oe(e),oe(e),i&&(oe(e),oe(e)),e.readBits(1)},oi=e=>{const t=new ne(e);if(2!==t.readBits(2))return null;const i=t.readBits(1),r=(t.readBits(1)<<1)+i;3===r&&t.skipBits(1);if(1===t.readBits(1))return null;if(0!==t.readBits(1))return null;t.skipBits(2);if(4817730!==t.readBits(24))return null;let a=8;if(r>=2){a=t.readBits(1)?12:10}const s=t.readBits(3);let n=0,o=0;if(7!==s){if(o=t.readBits(1),1===r||3===r){const e=t.readBits(1),i=t.readBits(1);n=e||i?e&&!i?2:1:3,t.skipBits(1)}else n=1}else n=3,o=1;const c=(t.readBits(16)+1)*(t.readBits(16)+1);let l=ae(gt).level;for(const h of gt)if(c<=h.maxPictureSize){l=h.level;break}return{profile:r,level:l,bitDepth:a,chromaSubsampling:n,videoFullRangeFlag:o,colourPrimaries:2===s?1:1===s?6:2,transferCharacteristics:2===s?1:1===s?6:2,matrixCoefficients:7===s?0:2===s?1:1===s?6:2}},ci=function*(e){const t=new ne(e),i=()=>{let e=0;for(let i=0;i<8;i++){const r=t.readAlignedByte();if(e|=(127&r)<<7*i,!(128&r))break;if(7===i&&128&r)return null}return e>=2**32-1?null:e};for(;t.getBitsLeft()>=8;){t.skipBits(1);const r=t.readBits(4),a=t.readBits(1),s=t.readBits(1);let n;if(t.skipBits(1),a&&t.skipBits(8),s){const e=i();if(null===e)return;n=e}else n=Math.floor(t.getBitsLeft()/8);ie(t.pos%8==0),yield{type:r,data:e.subarray(t.pos/8,t.pos/8+n)},t.skipBits(8*n)}},li=e=>{for(const{type:t,data:i}of ci(e)){if(1!==t)continue;const e=new ne(i),r=e.readBits(3);e.readBits(1);let a=0,s=0,n=0;if(e.readBits(1))a=e.readBits(5);else{if(e.readBits(1)){e.skipBits(32),e.skipBits(32);if(e.readBits(1))return null}const t=e.readBits(1);t&&(n=e.readBits(5),e.skipBits(32),e.skipBits(5),e.skipBits(5));const i=e.readBits(5);for(let r=0;r<=i;r++){e.skipBits(12);const i=e.readBits(5);if(0===r&&(a=i),i>7){const t=e.readBits(1);0===r&&(s=t)}if(t){if(e.readBits(1)){const t=n+1;e.skipBits(t),e.skipBits(t),e.skipBits(1)}}e.readBits(1)&&e.skipBits(4)}}const o=e.readBits(1);let c=8;if(2===r&&o){c=e.readBits(1)?12:10}else r<=2&&(c=o?10:8);let l=0;1!==r&&(l=e.readBits(1));let h=1,d=1,u=0;return l||(0===r?(h=1,d=1):1===r?(h=0,d=0):12===c&&(h=e.readBits(1),h&&(d=e.readBits(1))),h&&d&&(u=e.readBits(2))),{profile:r,level:a,tier:s,bitDepth:c,monochrome:l,chromaSubsamplingX:h,chromaSubsamplingY:d,chromaSamplePosition:u}}return null},hi=e=>{const t=he(e),i=t.getUint8(9),r=t.getUint16(10,!0),a=t.getUint32(12,!0),s=t.getInt16(16,!0),n=t.getUint8(18);let o=null;return n&&(o=e.subarray(19,21+i)),{outputChannelCount:i,preSkip:r,inputSampleRate:a,outputGain:s,channelMappingFamily:n,channelMappingTable:o}},di=[480,960,1920,2880,480,960,1920,2880,480,960,1920,2880,480,960,480,960,120,240,480,960,120,240,480,960,120,240,480,960,120,240,480,960],ui=e=>{if(e.length<7)throw new Error("Setup header is too s