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align structure more with underlying chunk layout

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This commit is contained in:
Joel Wetzell
2025-01-06 21:49:08 -06:00
parent acac519e9a
commit 6580f66e91
35 changed files with 594 additions and 372 deletions
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src/decoders/data/data-packet-chunk.ts
+20 -18
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@@ -1,30 +1,30 @@
import { Decoders } from '..';
import { Constants } from '../../constants';
import { DataPacketChunk } from '../../models/data/data-packet-chunk';
import { DataPacketChunk, DataPacketChunkData } from '../../models/data/data-packet-chunk';
function decodeDataPacketChunk(dataPacketChunk: DataPacketChunk) {
if (dataPacketChunk.has_subchunks && dataPacketChunk.chunk_data && dataPacketChunk.data_len) {
export default (buffer: Uint8Array): DataPacketChunk => {
const chunk = Decoders.Chunk(buffer);
const data: DataPacketChunkData = {};
if (chunk.header.hasSubchunks && chunk.chunkData && chunk.header.dataLen) {
let offset = 0;
while (offset < dataPacketChunk.data_len) {
const view = new DataView(
dataPacketChunk.chunk_data.buffer,
dataPacketChunk.chunk_data.byteOffset,
dataPacketChunk.chunk_data.byteLength
);
while (offset < chunk.header.dataLen) {
const view = new DataView(chunk.chunkData.buffer, chunk.chunkData.byteOffset, chunk.chunkData.byteLength);
const chunkId = view.getUint16(offset, true);
switch (chunkId) {
case 0x0000:
dataPacketChunk.packet_header = Decoders.PacketHeaderChunk(dataPacketChunk.chunk_data.slice(offset));
data.packetHeader = Decoders.PacketHeaderChunk(chunk.chunkData.subarray(offset));
offset += Constants.CHUNK_HEADER_SIZE;
if (dataPacketChunk.packet_header?.data_len) {
offset += dataPacketChunk.packet_header.data_len;
if (data.packetHeader.chunk.header.dataLen) {
offset += data.packetHeader.chunk.header.dataLen;
}
break;
case 0x0001:
dataPacketChunk.tracker_list = Decoders.DataTrackerListChunk(dataPacketChunk.chunk_data.slice(offset));
data.trackerList = Decoders.DataTrackerListChunk(chunk.chunkData.subarray(offset));
offset += Constants.CHUNK_HEADER_SIZE;
if (dataPacketChunk.tracker_list.data_len) {
offset += dataPacketChunk.tracker_list.data_len;
if (data.trackerList.chunk.header.dataLen) {
offset += data.trackerList.chunk.header.dataLen;
}
break;
default:
@@ -32,7 +32,9 @@ function decodeDataPacketChunk(dataPacketChunk: DataPacketChunk) {
}
}
}
}
export default (buffer: Uint8Array): DataPacketChunk =>
Decoders.Chunk(buffer, decodeDataPacketChunk) as DataPacketChunk;
return {
chunk,
data,
};
};