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Add specific, per-output-format data callbacks & rewrite some logic in the process

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Vanilagy
2025-03-22 20:30:24 +01:00
parent bbc2e088ca
commit ceb2528014
14 changed files with 458 additions and 100 deletions
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src/matroska/matroska-muxer.ts
+34 -22
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@@ -168,6 +168,10 @@ export class MatroskaMuxer extends Muxer {
}
private writeEBMLHeader() {
if (this.format._options.onEbmlHeader) {
this.writer.startTrackingWrites();
}
const ebmlHeader: EBML = { id: EBMLId.EBML, data: [
{ id: EBMLId.EBMLVersion, data: 1 },
{ id: EBMLId.EBMLReadVersion, data: 1 },
@@ -178,6 +182,11 @@ export class MatroskaMuxer extends Muxer {
{ id: EBMLId.DocTypeReadVersion, data: 2 },
] };
this.ebmlWriter.writeEBML(ebmlHeader);
if (this.format._options.onEbmlHeader) {
const { data, start } = this.writer.stopTrackingWrites(); // start should be 0
this.format._options.onEbmlHeader(data, start);
}
}
/**
@@ -365,14 +374,16 @@ export class MatroskaMuxer extends Muxer {
};
this.segment = segment;
if (this.format._options.onSegmentHeader) {
this.writer.startTrackingWrites();
}
this.ebmlWriter.writeEBML(segment);
/*
if (this.#writer instanceof BaseStreamTargetWriter && this.#writer.target.options.onHeader) {
let { data, start } = this.#writer.getTrackedWrites(); // start should be 0
this.#writer.target.options.onHeader(data, start);
if (this.format._options.onSegmentHeader) {
const { data, start } = this.writer.stopTrackingWrites();
this.format._options.onSegmentHeader(data, start);
}
*/
}
private createCues() {
@@ -776,15 +787,13 @@ export class MatroskaMuxer extends Muxer {
/** Creates a new Cluster element to contain media chunks. */
private createNewCluster(msTimestamp: number) {
if (this.currentCluster && !this.format._options.streamable) {
if (this.currentCluster) {
this.finalizeCurrentCluster();
}
/*
if (this.#writer instanceof BaseStreamTargetWriter && this.#writer.target.options.onCluster) {
this.#writer.startTrackingWrites();
if (this.format._options.onCluster) {
this.writer.startTrackingWrites();
}
*/
this.currentCluster = {
id: EBMLId.Cluster,
@@ -802,20 +811,23 @@ export class MatroskaMuxer extends Muxer {
private finalizeCurrentCluster() {
assert(this.currentCluster);
const clusterSize = this.writer.getPos() - this.ebmlWriter.dataOffsets.get(this.currentCluster)!;
const endPos = this.writer.getPos();
// Write the size now that we know it
this.writer.seek(this.ebmlWriter.offsets.get(this.currentCluster)! + 4);
this.ebmlWriter.writeVarInt(clusterSize, CLUSTER_SIZE_BYTES);
this.writer.seek(endPos);
if (!this.format._options.streamable) {
const clusterSize = this.writer.getPos() - this.ebmlWriter.dataOffsets.get(this.currentCluster)!;
const endPos = this.writer.getPos();
/*
if (this.#writer instanceof BaseStreamTargetWriter && this.#writer.target.options.onCluster) {
let { data, start } = this.#writer.getTrackedWrites();
this.#writer.target.options.onCluster(data, start, this.#currentClusterTimestamp);
// Write the size now that we know it
this.writer.seek(this.ebmlWriter.offsets.get(this.currentCluster)! + 4);
this.ebmlWriter.writeVarInt(clusterSize, CLUSTER_SIZE_BYTES);
this.writer.seek(endPos);
}
if (this.format._options.onCluster) {
assert(this.currentClusterStartMsTimestamp !== null);
const { data, start } = this.writer.stopTrackingWrites();
this.format._options.onCluster(data, start, this.currentClusterStartMsTimestamp / 1000);
}
*/
const clusterOffsetFromSegment
= this.ebmlWriter.offsets.get(this.currentCluster)! - this.segmentDataOffset;
@@ -869,7 +881,7 @@ export class MatroskaMuxer extends Muxer {
// Flush any remaining queued chunks to the file
await this.interleaveChunks(true);
if (!this.format._options.streamable && this.currentCluster) {
if (this.currentCluster) {
this.finalizeCurrentCluster();
}