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(() => {
// build/mp4Muxer.transformed.js
(() => {
"use strict";
var __accessCheck = (obj, member, msg) => {
if (!member.has(obj))
throw TypeError("Cannot " + msg);
};
var __privateGet = (obj, member, getter) => {
__accessCheck(obj, member, "read from private field");
return getter ? getter.call(obj) : member.get(obj);
};
var __privateAdd = (obj, member, value) => {
if (member.has(obj))
throw TypeError("Cannot add the same private member more than once");
member instanceof WeakSet ? member.add(obj) : member.set(obj, value);
};
var __privateSet = (obj, member, value, setter) => {
__accessCheck(obj, member, "write to private field");
setter ? setter.call(obj, value) : member.set(obj, value);
return value;
};
var __privateMethod = (obj, member, method) => {
__accessCheck(obj, member, "access private method");
return method;
};
var bytes = new Uint8Array(8);
var view = new DataView(bytes.buffer);
var u8 = (value) => {
return [(value % 256 + 256) % 256];
};
var u16 = (value) => {
view.setUint16(0, value, false);
return [bytes[0], bytes[1]];
};
var i16 = (value) => {
view.setInt16(0, value, false);
return [bytes[0], bytes[1]];
};
var u24 = (value) => {
view.setUint32(0, value, false);
return [bytes[1], bytes[2], bytes[3]];
};
var u32 = (value) => {
view.setUint32(0, value, false);
return [bytes[0], bytes[1], bytes[2], bytes[3]];
};
var i32 = (value) => {
view.setInt32(0, value, false);
return [bytes[0], bytes[1], bytes[2], bytes[3]];
};
var u64 = (value) => {
view.setUint32(0, Math.floor(value / 2 ** 32), false);
view.setUint32(4, value, false);
return [bytes[0], bytes[1], bytes[2], bytes[3], bytes[4], bytes[5], bytes[6], bytes[7]];
};
var fixed_8_8 = (value) => {
view.setInt16(0, 2 ** 8 * value, false);
return [bytes[0], bytes[1]];
};
var fixed_16_16 = (value) => {
view.setInt32(0, 2 ** 16 * value, false);
return [bytes[0], bytes[1], bytes[2], bytes[3]];
};
var fixed_2_30 = (value) => {
view.setInt32(0, 2 ** 30 * value, false);
return [bytes[0], bytes[1], bytes[2], bytes[3]];
};
var ascii = (text, nullTerminated = false) => {
let bytes2 = Array(text.length).fill(null).map((_, i) => text.charCodeAt(i));
if (nullTerminated)
bytes2.push(0);
return bytes2;
};
var last = (arr) => {
return arr && arr[arr.length - 1];
};
var lastPresentedSample = (samples) => {
let result = void 0;
for (let sample of samples) {
if (!result || sample.presentationTimestamp > result.presentationTimestamp) {
result = sample;
}
}
return result;
};
var intoTimescale = (timeInSeconds, timescale, round = true) => {
let value = timeInSeconds * timescale;
return round ? Math.round(value) : value;
};
var IDENTITY_MATRIX = [1, 0, 0, 0, 1, 0, 0, 0, 1];
var deepClone = (x) => {
if (!x)
return x;
if (typeof x !== "object")
return x;
if (Array.isArray(x))
return x.map(deepClone);
return Object.fromEntries(
Object.entries(x).map(([key, value]) => [key, deepClone(value)]));
};
var isU32 = (value) => {
return value >= 0 && value < 2 ** 32;
};
var box = (type, contents, children) => ({
type,
contents: contents && new Uint8Array(contents.flat(10)),
children
});
var fullBox = (type, version, flags, contents, children) => box(
type,
[u8(version), u24(flags), contents ?? []],
children
);
var ftyp = (details) => {
let minorVersion = 512;
return box("ftyp", [
ascii("isom"),
// Major brand
u32(minorVersion),
// Minor version
// Compatible brands
ascii("isom"),
details.holdsAvc ? ascii("avc1") : [],
ascii("mp41")
]);
};
var mdat = (reserveLargeSize) => ({ type: "mdat", largeSize: reserveLargeSize });
var moov = (tracks, creationTime, fragmented = false) => box("moov", null, [
mvhd(creationTime, tracks),
...tracks.map((x) => trak(x, creationTime)),
null
]);
var mvhd = (creationTime, tracks) => {
let duration = intoTimescale(Math.max(
0,
...tracks.filter((x) => x.samples.length > 0).map((x) => {
const lastSample = lastPresentedSample(x.samples);
return lastSample.presentationTimestamp + lastSample.duration;
})
), GLOBAL_TIMESCALE);
let nextTrackId = Math.max(...tracks.map((x) => x.id)) + 1;
let needsU64 = !isU32(creationTime) || !isU32(duration);
let u32OrU64 = needsU64 ? u64 : u32;
return fullBox("mvhd", +needsU64, 0, [
u32OrU64(creationTime),
// Creation time
u32OrU64(creationTime),
// Modification time
u32(GLOBAL_TIMESCALE),
// Timescale
u32OrU64(duration),
// Duration
fixed_16_16(1),
// Preferred rate
fixed_8_8(1),
// Preferred volume
Array(10).fill(0),
// Reserved
[fixed_16_16(1), fixed_16_16(0), fixed_2_30(0),
fixed_16_16(0), fixed_16_16(1), fixed_2_30(0),
fixed_16_16(0), fixed_16_16(0), fixed_2_30(1)],
// Matrix
Array(24).fill(0),
// Pre-defined
u32(nextTrackId)
// Next track ID
]);
};
var trak = (track, creationTime) => box("trak", null, [
tkhd(track, creationTime),
mdia(track, creationTime)
]);
var tkhd = (track, creationTime) => {
let lastSample = lastPresentedSample(track.samples);
let durationInGlobalTimescale = intoTimescale(
lastSample ? lastSample.presentationTimestamp + lastSample.duration : 0,
GLOBAL_TIMESCALE
);
let needsU64 = !isU32(creationTime) || !isU32(durationInGlobalTimescale);
let u32OrU64 = needsU64 ? u64 : u32;
let matrix = IDENTITY_MATRIX;
return fullBox("tkhd", +needsU64, 3, [
u32OrU64(creationTime),
// Creation time
u32OrU64(creationTime),
// Modification time
u32(track.id),
// Track ID
u32(0),
// Reserved
u32OrU64(durationInGlobalTimescale),
// Duration
Array(8).fill(0),
// Reserved
u16(0),
// Layer
u16(0),
// Alternate group
fixed_8_8(track.info.type === "audio" ? 1 : 0),
// Volume
u16(0),
// Reserved
[fixed_16_16(1), fixed_16_16(0), fixed_2_30(0),
fixed_16_16(0), fixed_16_16(1), fixed_2_30(0),
fixed_16_16(0), fixed_16_16(0), fixed_2_30(1)],
// Matrix
fixed_16_16(track.info.type === "video" ? track.info.width : 0),
// Track width
fixed_16_16(track.info.type === "video" ? track.info.height : 0)
// Track height
]);
};
var mdia = (track, creationTime) => box("mdia", null, [
mdhd(track, creationTime),
hdlr(track.info.type === "video" ? "vide" : "soun"),
minf(track)
]);
var mdhd = (track, creationTime) => {
let lastSample = lastPresentedSample(track.samples);
let localDuration = intoTimescale(
lastSample ? lastSample.presentationTimestamp + lastSample.duration : 0,
track.timescale
);
let needsU64 = !isU32(creationTime) || !isU32(localDuration);
let u32OrU64 = needsU64 ? u64 : u32;
return fullBox("mdhd", +needsU64, 0, [
u32OrU64(creationTime),
// Creation time
u32OrU64(creationTime),
// Modification time
u32(track.timescale),
// Timescale
u32OrU64(localDuration),
// Duration
u16(21956),
// Language ("und", undetermined)
u16(0)
// Quality
]);
};
var hdlr = (componentSubtype) => fullBox("hdlr", 0, 0, [
ascii("mhlr"),
// Component type
ascii(componentSubtype),
// Component subtype
u32(0),
// Component manufacturer
u32(0),
// Component flags
u32(0),
// Component flags mask
ascii("mp4-muxer-hdlr", true)
// Component name
]);
var minf = (track) => box("minf", null, [
vmhd(),
dinf(),
stbl(track)
]);
var vmhd = () => fullBox("vmhd", 0, 1, [
u16(0),
// Graphics mode
u16(0),
// Opcolor R
u16(0),
// Opcolor G
u16(0)
// Opcolor B
]);
var dinf = () => box("dinf", null, [
dref()
]);
var dref = () => fullBox("dref", 0, 0, [
u32(1)
// Entry count
], [
url()
]);
var url = () => fullBox("url ", 0, 1);
var stbl = (track) => {
const needsCtts = track.compositionTimeOffsetTable.length > 1 ||
track.compositionTimeOffsetTable.some((x) => x.sampleCompositionTimeOffset !== 0);
return box("stbl", null, [
stsd(track),
stts(track),
stss(track),
stsc(track),
stsz(track),
stco(track),
needsCtts ? ctts(track) : null
]);
};
var stsd = (track) => fullBox("stsd", 0, 0, [
u32(1)
// Entry count
], [
videoSampleDescription(VIDEO_CODEC_TO_BOX_NAME[track.info.codec], track)
]);
var videoSampleDescription = (compressionType, track) => box(compressionType, [
Array(6).fill(0),
// Reserved
u16(1),
// Data reference index
u16(0),
// Pre-defined
u16(0),
// Reserved
Array(12).fill(0),
// Pre-defined
u16(track.info.width),
// Width
u16(track.info.height),
// Height
u32(4718592),
// Horizontal resolution
u32(4718592),
// Vertical resolution
u32(0),
// Reserved
u16(1),
// Frame count
Array(32).fill(0),
// Compressor name
u16(24),
// Depth
i16(65535)
// Pre-defined
], [
VIDEO_CODEC_TO_CONFIGURATION_BOX[track.info.codec](track),
track.info.decoderConfig.colorSpace ? colr(track) : null
]);
var COLOR_PRIMARIES_MAP = {
"bt709": 1,
// ITU-R BT.709
"bt470bg": 5,
// ITU-R BT.470BG
"smpte170m": 6
// ITU-R BT.601 525 - SMPTE 170M
};
var TRANSFER_CHARACTERISTICS_MAP = {
"bt709": 1,
// ITU-R BT.709
"smpte170m": 6,
// SMPTE 170M
"iec61966-2-1": 13
// IEC 61966-2-1
};
var MATRIX_COEFFICIENTS_MAP = {
"rgb": 0,
// Identity
"bt709": 1,
// ITU-R BT.709
"bt470bg": 5,
// ITU-R BT.470BG
"smpte170m": 6
// SMPTE 170M
};
var colr = (track) => box("colr", [
ascii("nclx"),
// Colour type
u16(COLOR_PRIMARIES_MAP[track.info.decoderConfig.colorSpace.primaries]),
// Colour primaries
u16(TRANSFER_CHARACTERISTICS_MAP[track.info.decoderConfig.colorSpace.transfer]),
// Transfer characteristics
u16(MATRIX_COEFFICIENTS_MAP[track.info.decoderConfig.colorSpace.matrix]),
// Matrix coefficients
u8((track.info.decoderConfig.colorSpace.fullRange ? 1 : 0) << 7)
// Full range flag
]);
var avcC = (track) => track.info.decoderConfig && box("avcC", [
// For AVC, description is an AVCDecoderConfigurationRecord, so nothing else to do here
...new Uint8Array(track.info.decoderConfig.description)
]);
var stts = (track) => {
return fullBox("stts", 0, 0, [
u32(track.timeToSampleTable.length),
// Number of entries
track.timeToSampleTable.map((x) => [
// Time-to-sample table
u32(x.sampleCount),
// Sample count
u32(x.sampleDelta)
// Sample duration
])
]);
};
var stss = (track) => {
if (track.samples.every((x) => x.type === "key"))
return null;
let keySamples = [...track.samples.entries()]
.filter(([, sample]) => sample.type === "key");
return fullBox("stss", 0, 0, [
u32(keySamples.length),
// Number of entries
keySamples.map(([index]) => u32(index + 1))
// Sync sample table
]);
};
var stsc = (track) => {
return fullBox("stsc", 0, 0, [
u32(track.compactlyCodedChunkTable.length),
// Number of entries
track.compactlyCodedChunkTable.map((x) => [
// Sample-to-chunk table
u32(x.firstChunk),
// First chunk
u32(x.samplesPerChunk),
// Samples per chunk
u32(1)
// Sample description index
])
]);
};
var stsz = (track) => fullBox("stsz", 0, 0, [
u32(0),
// Sample size (0 means non-constant size)
u32(track.samples.length),
// Number of entries
track.samples.map((x) => u32(x.size))
// Sample size table
]);
var stco = (track) => {
if (track.finalizedChunks.length > 0 && last(track.finalizedChunks).offset >= 2 ** 32) {
return fullBox("co64", 0, 0, [
u32(track.finalizedChunks.length),
// Number of entries
track.finalizedChunks.map((x) => u64(x.offset))
// Chunk offset table
]);
}
return fullBox("stco", 0, 0, [
u32(track.finalizedChunks.length),
// Number of entries
track.finalizedChunks.map((x) => u32(x.offset))
// Chunk offset table
]);
};
var ctts = (track) => {
return fullBox("ctts", 0, 0, [
u32(track.compositionTimeOffsetTable.length),
// Number of entries
track.compositionTimeOffsetTable.map((x) => [
// Time-to-sample table
u32(x.sampleCount),
// Sample count
u32(x.sampleCompositionTimeOffset)
// Sample offset
])
]);
};
var VIDEO_CODEC_TO_BOX_NAME = {
"avc": "avc1",
"hevc": "hvc1",
"vp9": "vp09",
"av1": "av01"
};
var VIDEO_CODEC_TO_CONFIGURATION_BOX = { "avc": avcC };
var AUDIO_CODEC_TO_CONFIGURATION_BOX = {};
var isTarget = Symbol("isTarget");
var Target = class {
};
isTarget;
var ArrayBufferTarget = class extends Target {
constructor() {
super(...arguments);
this.buffer = null;
}
};
var _helper, _helperView;
var Writer = class {
constructor() {
this.pos = 0;
__privateAdd(this, _helper, new Uint8Array(8));
__privateAdd(this, _helperView, new DataView(__privateGet(this, _helper).buffer));
this.offsets = /* @__PURE__ */ new WeakMap();
}
/** Sets the current position for future writes to a new one. */
seek(newPos) {
this.pos = newPos;
}
writeU32(value) {
__privateGet(this, _helperView).setUint32(0, value, false);
this.write(__privateGet(this, _helper).subarray(0, 4));
}
writeU64(value) {
__privateGet(this, _helperView).setUint32(0, Math.floor(value / 2 ** 32), false);
__privateGet(this, _helperView).setUint32(4, value, false);
this.write(__privateGet(this, _helper).subarray(0, 8));
}
writeAscii(text) {
for (let i = 0; i < text.length; i++) {
__privateGet(this, _helperView).setUint8(i % 8, text.charCodeAt(i));
if (i % 8 === 7)
this.write(__privateGet(this, _helper));
}
if (text.length % 8 !== 0) {
this.write(__privateGet(this, _helper).subarray(0, text.length % 8));
}
}
writeBox(box2) {
this.offsets.set(box2, this.pos);
if (box2.contents && !box2.children) {
this.writeBoxHeader(box2, box2.size ?? box2.contents.byteLength + 8);
this.write(box2.contents);
} else {
let startPos = this.pos;
this.writeBoxHeader(box2, 0);
if (box2.contents)
this.write(box2.contents);
if (box2.children) {
for (let child of box2.children)
if (child)
this.writeBox(child);
}
let endPos = this.pos;
let size = box2.size ?? endPos - startPos;
this.seek(startPos);
this.writeBoxHeader(box2, size);
this.seek(endPos);
}
}
writeBoxHeader(box2, size) {
this.writeU32(box2.largeSize ? 1 : size);
this.writeAscii(box2.type);
if (box2.largeSize)
this.writeU64(size);
}
measureBoxHeader(box2) {
return 8 + (box2.largeSize ? 8 : 0);
}
measureBox(box2) {
if (box2.contents && !box2.children) {
let headerSize = this.measureBoxHeader(box2);
return headerSize + box2.contents.byteLength;
} else {
let result = this.measureBoxHeader(box2);
if (box2.contents)
result += box2.contents.byteLength;
if (box2.children) {
for (let child of box2.children)
if (child)
result += this.measureBox(child);
}
return result;
}
}
};
_helper = /* @__PURE__ */ new WeakMap();
_helperView = /* @__PURE__ */ new WeakMap();
var _target, _buffer, _bytes, _maxPos, _ensureSize, ensureSize_fn;
var ArrayBufferTargetWriter = class extends Writer {
constructor(target) {
super();
__privateAdd(this, _ensureSize);
__privateAdd(this, _target, void 0);
__privateAdd(this, _buffer, new ArrayBuffer(2 ** 16));
__privateAdd(this, _bytes, new Uint8Array(__privateGet(this, _buffer)));
__privateAdd(this, _maxPos, 0);
__privateSet(this, _target, target);
}
write(data) {
__privateMethod(this, _ensureSize, ensureSize_fn).call(this, this.pos + data.byteLength);
__privateGet(this, _bytes).set(data, this.pos);
this.pos += data.byteLength;
__privateSet(this, _maxPos,
Math.max(__privateGet(this, _maxPos), this.pos));
}
finalize() {
__privateMethod(this, _ensureSize, ensureSize_fn).call(this, this.pos);
__privateGet(this, _target).buffer = __privateGet(this, _buffer).slice(0,
Math.max(__privateGet(this, _maxPos), this.pos));
}
};
_target = /* @__PURE__ */ new WeakMap();
_buffer = /* @__PURE__ */ new WeakMap();
_bytes = /* @__PURE__ */ new WeakMap();
_maxPos = /* @__PURE__ */ new WeakMap();
_ensureSize = /* @__PURE__ */ new WeakSet();
ensureSize_fn = function(size) {
let newLength = __privateGet(this, _buffer).byteLength;
while (newLength < size)
newLength *= 2;
if (newLength === __privateGet(this, _buffer).byteLength)
return;
let newBuffer = new ArrayBuffer(newLength);
let newBytes = new Uint8Array(newBuffer);
newBytes.set(__privateGet(this, _bytes), 0);
__privateSet(this, _buffer, newBuffer);
__privateSet(this, _bytes, newBytes);
};
var DEFAULT_CHUNK_SIZE = 2 ** 24;
var MAX_CHUNKS_AT_ONCE = 2;
var GLOBAL_TIMESCALE = 1e3;
var SUPPORTED_VIDEO_CODECS = ["avc", "hevc", "vp9", "av1"];
var TIMESTAMP_OFFSET = 2082844800;
var FIRST_TIMESTAMP_BEHAVIORS = ["strict", "offset", "cross-track-offset"];
var _options, _writer, _ftypSize, _mdat, _videoTrack, _creationTime;
var _finalizedChunks, _finalized;
var _validateOptions, validateOptions_fn;
var _writeHeader, writeHeader_fn;
var _prepareTracks, prepareTracks_fn;
var _createSampleForTrack, createSampleForTrack_fn;
var _addSampleToTrack, addSampleToTrack_fn;
var _validateTimestamp, validateTimestamp_fn;
var _finalizeCurrentChunk, finalizeCurrentChunk_fn;
var _maybeFlushStreamingTargetWriter, maybeFlushStreamingTargetWriter_fn;
var _ensureNotFinalized, ensureNotFinalized_fn;
var Muxer = class {
constructor(options) {
__privateAdd(this, _validateOptions);
__privateAdd(this, _writeHeader);
__privateAdd(this, _prepareTracks);
__privateAdd(this, _createSampleForTrack);
__privateAdd(this, _addSampleToTrack);
__privateAdd(this, _validateTimestamp);
__privateAdd(this, _finalizeCurrentChunk);
__privateAdd(this, _maybeFlushStreamingTargetWriter);
__privateAdd(this, _ensureNotFinalized);
__privateAdd(this, _options, void 0);
__privateAdd(this, _writer, void 0);
__privateAdd(this, _ftypSize, void 0);
__privateAdd(this, _mdat, void 0);
__privateAdd(this, _videoTrack, null);
__privateAdd(this, _creationTime, Math.floor(Date.now() / 1e3) + TIMESTAMP_OFFSET);
__privateAdd(this, _finalizedChunks, []);
__privateAdd(this, _finalized, false);
__privateMethod(this, _validateOptions, validateOptions_fn).call(this, options);
options.video = deepClone(options.video);
options.audio = deepClone(options.audio);
options.fastStart = deepClone(options.fastStart);
this.target = options.target;
__privateSet(this, _options, {
firstTimestampBehavior: "strict",
...options
});
if (options.target instanceof ArrayBufferTarget) {
__privateSet(this, _writer, new ArrayBufferTargetWriter(options.target));
} else {
throw new Error(`Invalid target: ${options.target}`);
}
__privateMethod(this, _prepareTracks, prepareTracks_fn).call(this);
__privateMethod(this, _writeHeader, writeHeader_fn).call(this);
}
addVideoChunk(sample, meta, timestamp, compositionTimeOffset) {
if (!(sample instanceof EncodedVideoChunk)) {
throw new TypeError("sample must be EncodedVideoChunk");
}
if (meta && typeof meta !== "object") {
throw new TypeError("meta must be object");
}
if (timestamp !== void 0 && (!Number.isFinite(timestamp) || timestamp < 0)) {
throw new TypeError(
"timestamp must be non-negative"
);
}
if (compositionTimeOffset !== void 0 &&
!Number.isFinite(compositionTimeOffset)) {
throw new TypeError(
"compositionTimeOffset must be number"
);
}
let data = new Uint8Array(sample.byteLength);
sample.copyTo(data);
this.addVideoChunkRaw(
data,
sample.type,
timestamp ?? sample.timestamp,
sample.duration,
meta,
compositionTimeOffset
);
}
addVideoChunkRaw(data, type, timestamp, duration, meta, compositionTimeOffset) {
if (!(data instanceof Uint8Array)) {
throw new TypeError("data must be Uint8Array");
}
if (type !== "key" && type !== "delta") {
throw new TypeError("type must be 'key'|'delta'");
}
if (!Number.isFinite(timestamp) || timestamp < 0) {
throw new TypeError("timestamp must be non-negative");
}
if (!Number.isFinite(duration) || duration < 0) {
throw new TypeError("duration must be non-negative");
}
if (meta && typeof meta !== "object") {
throw new TypeError("meta must be object");
}
if (compositionTimeOffset !== void 0 &&
!Number.isFinite(compositionTimeOffset)) {
throw new TypeError(
"compositionTimeOffset must be number"
);
}
__privateMethod(this, _ensureNotFinalized, ensureNotFinalized_fn).call(this);
if (!__privateGet(this, _options).video)
throw new Error("No video track declared.");
let videoSample = __privateMethod(
this, _createSampleForTrack, createSampleForTrack_fn
).call(
this, __privateGet(this, _videoTrack), data, type,
timestamp, duration, meta, compositionTimeOffset
);
__privateMethod(
this, _addSampleToTrack, addSampleToTrack_fn
).call(this, __privateGet(this, _videoTrack), videoSample);
}
/**
* Finalizes the file, making it ready for use.
* Must be called after all video and audio chunks have been added.
*/
finalize() {
if (__privateGet(this, _finalized)) {
throw new Error("Cannot finalize a muxer more than once.");
}
if (__privateGet(this, _videoTrack))
__privateMethod(
this, _finalizeCurrentChunk, finalizeCurrentChunk_fn
).call(this, __privateGet(this, _videoTrack));
let tracks = [__privateGet(this, _videoTrack)].filter(Boolean);
if (__privateGet(this, _options).fastStart === "in-memory") {
let mdatSize;
for (let i = 0; i < 2; i++) {
let movieBox2 = moov(tracks, __privateGet(this, _creationTime));
let movieBoxSize = __privateGet(this, _writer).measureBox(movieBox2);
mdatSize = __privateGet(this, _writer).measureBox(__privateGet(this, _mdat));
let currentChunkPos = __privateGet(this, _writer).pos + movieBoxSize + mdatSize;
for (let chunk of __privateGet(this, _finalizedChunks)) {
chunk.offset = currentChunkPos;
for (let { data } of chunk.samples) {
currentChunkPos += data.byteLength;
mdatSize += data.byteLength;
}
}
if (currentChunkPos < 2 ** 32)
break;
if (mdatSize >= 2 ** 32)
__privateGet(this, _mdat).largeSize = true;
}
let movieBox = moov(tracks, __privateGet(this, _creationTime));
__privateGet(this, _writer).writeBox(movieBox);
__privateGet(this, _mdat).size = mdatSize;
__privateGet(this, _writer).writeBox(__privateGet(this, _mdat));
for (let chunk of __privateGet(this, _finalizedChunks)) {
for (let sample of chunk.samples) {
__privateGet(this, _writer).write(sample.data);
sample.data = null;
}
}
}
__privateMethod(
this, _maybeFlushStreamingTargetWriter,
maybeFlushStreamingTargetWriter_fn
).call(this);
__privateGet(this, _writer).finalize();
__privateSet(this, _finalized, true);
}
};
_options = /* @__PURE__ */ new WeakMap();
_writer = /* @__PURE__ */ new WeakMap();
_ftypSize = /* @__PURE__ */ new WeakMap();
_mdat = /* @__PURE__ */ new WeakMap();
_videoTrack = /* @__PURE__ */ new WeakMap();
_creationTime = /* @__PURE__ */ new WeakMap();
_finalizedChunks = /* @__PURE__ */ new WeakMap();
_finalized = /* @__PURE__ */ new WeakMap();
_validateOptions = /* @__PURE__ */ new WeakSet();
validateOptions_fn = function(options) {
if (typeof options !== "object") {
throw new TypeError("options required");
}
if (!(options.target instanceof Target)) {
throw new TypeError("target must be Target instance");
}
if (options.video) {
if (!SUPPORTED_VIDEO_CODECS.includes(options.video.codec)) {
throw new TypeError(`Unsupported video codec: ${options.video.codec}`);
}
if (!Number.isInteger(options.video.width) || options.video.width <= 0) {
throw new TypeError(
`Invalid video width: ${options.video.width}. Must be a positive integer.`
);
}
if (!Number.isInteger(options.video.height) || options.video.height <= 0) {
throw new TypeError(
`Invalid video height: ${options.video.height}. Must be a positive integer.`
);
}
const videoRotation = options.video.rotation;
if (typeof videoRotation === "number" && ![0, 90, 180, 270].includes(videoRotation)) {
throw new TypeError(
`Invalid video rotation: ${videoRotation}. Has to be 0, 90, 180 or 270.`
);
} else if (
Array.isArray(videoRotation) &&
(videoRotation.length !== 9 ||
videoRotation.some((value) => typeof value !== "number"))
) {
throw new TypeError(`Invalid video transformation matrix: ${videoRotation.join()}`);
}
if (
options.video.frameRate !== void 0 &&
(!Number.isInteger(options.video.frameRate) ||
options.video.frameRate <= 0)
) {
throw new TypeError(
`Invalid video frame rate: ${options.video.frameRate}. Must be a positive integer.`
);
}
}
if (
options.firstTimestampBehavior &&
!FIRST_TIMESTAMP_BEHAVIORS.includes(options.firstTimestampBehavior)
) {
throw new TypeError(
`Invalid first timestamp behavior: ${options.firstTimestampBehavior}`);
}
if (options.fastStart !== "in-memory") {
throw new TypeError(`'fastStart' must be 'in-memory'.`);
}
};
_writeHeader = /* @__PURE__ */ new WeakSet();
writeHeader_fn = function() {
__privateGet(this, _writer).writeBox(ftyp({
holdsAvc: __privateGet(this, _options).video?.codec === "avc",
fragmented: false
}));
__privateSet(this, _ftypSize, __privateGet(this, _writer).pos);
__privateSet(this, _mdat, mdat(false));
__privateMethod(
this, _maybeFlushStreamingTargetWriter,
maybeFlushStreamingTargetWriter_fn
).call(this);
};
_prepareTracks = /* @__PURE__ */ new WeakSet();
prepareTracks_fn = function() {
if (__privateGet(this, _options).video) {
__privateSet(this, _videoTrack, {
id: 1,
info: {
type: "video",
codec: __privateGet(this, _options).video.codec,
width: __privateGet(this, _options).video.width,
height: __privateGet(this, _options).video.height,
rotation: __privateGet(this, _options).video.rotation ?? 0,
decoderConfig: null
},
// The fallback contains many common frame rates as factors
timescale: __privateGet(this, _options).video.frameRate ?? 57600,
samples: [],
finalizedChunks: [],
currentChunk: null,
firstDecodeTimestamp: void 0,
lastDecodeTimestamp: -1,
timeToSampleTable: [],
compositionTimeOffsetTable: [],
lastTimescaleUnits: null,
lastSample: null,
compactlyCodedChunkTable: []
});
}
};
_createSampleForTrack = /* @__PURE__ */ new WeakSet();
createSampleForTrack_fn = function(
track, data, type, timestamp, duration, meta, compositionTimeOffset
) {
let presentationTimestampInSeconds = timestamp / 1e6;
let decodeTimestampInSeconds = (timestamp - (compositionTimeOffset ?? 0)) / 1e6;
let durationInSeconds = duration / 1e6;
let adjusted = __privateMethod(
this, _validateTimestamp, validateTimestamp_fn
).call(
this, presentationTimestampInSeconds, decodeTimestampInSeconds, track
);
presentationTimestampInSeconds = adjusted.presentationTimestamp;
decodeTimestampInSeconds = adjusted.decodeTimestamp;
if (meta?.decoderConfig) {
if (track.info.decoderConfig === null) {
track.info.decoderConfig = meta.decoderConfig;
} else {
Object.assign(track.info.decoderConfig, meta.decoderConfig);
}
}
let sample = {
presentationTimestamp: presentationTimestampInSeconds,
decodeTimestamp: decodeTimestampInSeconds,
duration: durationInSeconds,
data,
size: data.byteLength,
type,
// Will be refined once the next sample comes in
timescaleUnitsToNextSample: intoTimescale(durationInSeconds, track.timescale)
};
return sample;
};
_addSampleToTrack = /* @__PURE__ */ new WeakSet();
addSampleToTrack_fn = function(track, sample) {
track.samples.push(sample);
const sampleCompositionTimeOffset = intoTimescale(
sample.presentationTimestamp - sample.decodeTimestamp,
track.timescale
);
if (track.lastTimescaleUnits !== null) {
let timescaleUnits = intoTimescale(sample.decodeTimestamp, track.timescale, false);
let delta = Math.round(timescaleUnits - track.lastTimescaleUnits);
track.lastTimescaleUnits += delta;
track.lastSample.timescaleUnitsToNextSample = delta;
if (__privateGet(this, _options).fastStart !== "fragmented") {
let lastTableEntry = last(track.timeToSampleTable);
if (lastTableEntry.sampleCount === 1) {
lastTableEntry.sampleDelta = delta;
lastTableEntry.sampleCount++;
} else if (lastTableEntry.sampleDelta === delta) {
lastTableEntry.sampleCount++;
} else {
lastTableEntry.sampleCount--;
track.timeToSampleTable.push({
sampleCount: 2,
sampleDelta: delta
});
}
const lastCompositionTimeOffsetTableEntry = last(track.compositionTimeOffsetTable);
if (
lastCompositionTimeOffsetTableEntry.sampleCompositionTimeOffset ===
sampleCompositionTimeOffset
) {
lastCompositionTimeOffsetTableEntry.sampleCount++;
} else {
track.compositionTimeOffsetTable.push({
sampleCount: 1,
sampleCompositionTimeOffset
});
}
}
} else {
track.lastTimescaleUnits = 0;
track.timeToSampleTable.push({
sampleCount: 1,
sampleDelta: intoTimescale(sample.duration, track.timescale)
});
track.compositionTimeOffsetTable.push({
sampleCount: 1,
sampleCompositionTimeOffset
});
}
track.lastSample = sample;
let beginNewChunk = false;
if (!track.currentChunk) {
beginNewChunk = true;
} else {
let currentChunkDuration = sample.presentationTimestamp -
track.currentChunk.startTimestamp;
beginNewChunk = currentChunkDuration >= 0.5;
}
if (beginNewChunk) {
if (track.currentChunk) {
__privateMethod(this, _finalizeCurrentChunk, finalizeCurrentChunk_fn).call(this, track);
}
track.currentChunk = {
startTimestamp: sample.presentationTimestamp,
samples: []
};
}
track.currentChunk.samples.push(sample);
};
_validateTimestamp = /* @__PURE__ */ new WeakSet();
validateTimestamp_fn = function(presentationTimestamp, decodeTimestamp, track) {
const strictTimestampBehavior =
__privateGet(this, _options).firstTimestampBehavior === "strict";
const noLastDecodeTimestamp = track.lastDecodeTimestamp === -1;
const timestampNonZero = decodeTimestamp !== 0;
if (strictTimestampBehavior && noLastDecodeTimestamp && timestampNonZero) {
throw new Error(
`First chunk must have timestamp 0 (got DTS=${decodeTimestamp}). ` +
`Use firstTimestampBehavior:"offset" to auto-fix.`
);
} else if (
__privateGet(this, _options).firstTimestampBehavior === "offset" ||
__privateGet(this, _options).firstTimestampBehavior === "cross-track-offset"
) {
if (track.firstDecodeTimestamp === void 0) {
track.firstDecodeTimestamp = decodeTimestamp;
}
let baseDecodeTimestamp;
if (__privateGet(this, _options).firstTimestampBehavior === "offset") {
baseDecodeTimestamp = track.firstDecodeTimestamp;
} else {
baseDecodeTimestamp = Math.min(
__privateGet(this, _videoTrack)?.firstDecodeTimestamp ?? Infinity,
Infinity
);
}
decodeTimestamp -= baseDecodeTimestamp;
presentationTimestamp -= baseDecodeTimestamp;
}
if (decodeTimestamp < track.lastDecodeTimestamp) {
throw new Error(
`Timestamps must be monotonically increasing ` +
`(DTS went from ${track.lastDecodeTimestamp * 1e6} to ${decodeTimestamp * 1e6}).`
);
}
track.lastDecodeTimestamp = decodeTimestamp;
return { presentationTimestamp, decodeTimestamp };
};
_finalizeCurrentChunk = /* @__PURE__ */ new WeakSet();
finalizeCurrentChunk_fn = function(track) {
if (!track.currentChunk)
return;
track.finalizedChunks.push(track.currentChunk);
__privateGet(this, _finalizedChunks).push(track.currentChunk);
if (
track.compactlyCodedChunkTable.length === 0 ||
last(track.compactlyCodedChunkTable).samplesPerChunk !==
track.currentChunk.samples.length
) {
track.compactlyCodedChunkTable.push({
firstChunk: track.finalizedChunks.length,
// 1-indexed
samplesPerChunk: track.currentChunk.samples.length
});
}
if (__privateGet(this, _options).fastStart === "in-memory") {
track.currentChunk.offset = 0;
}
};
_maybeFlushStreamingTargetWriter = /* @__PURE__ */ new WeakSet();
maybeFlushStreamingTargetWriter_fn = function() {
};
_ensureNotFinalized = /* @__PURE__ */ new WeakSet();
ensureNotFinalized_fn = function() {
if (__privateGet(this, _finalized)) {
throw new Error(
"Cannot add new video or audio chunks after the file has been finalized.");
}
};
window.Mp4Muxer = { Muxer, ArrayBufferTarget };
})();
})();
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