Method writeTree

packages/alphatab/src/zip/DeflaterHuffman.ts:391–437

* Write tree values * @param blTree Tree to write

(blTree: Tree)

     * @param blTree Tree to write
     */
    public writeTree(blTree: Tree) {
        let maxCount: number; // max repeat count
        let minCount: number; // min repeat count
        let count: number; // repeat count of the current code
        let curlen = -1; // length of current code

        let i = 0;
        while (i < this.numCodes) {
            count = 1;
            const nextlen = this.length![i];
            if (nextlen === 0) {
                maxCount = 138;
                minCount = 3;
            } else {
                maxCount = 6;
                minCount = 3;
                if (curlen !== nextlen) {
                    blTree.writeSymbol(nextlen);
                    count = 0;
                }
            }
            curlen = nextlen;
            i++;

            while (i < this.numCodes && curlen === this.length![i]) {
                i++;
                if (++count >= maxCount) {
                    break;
                }
            }

            if (count < minCount) {
                while (count-- > 0) {
                    blTree.writeSymbol(curlen);
                }
            } else if (curlen !== 0) {
                blTree.writeSymbol(Tree._repeat3To6);
                this._huffman.pending.writeBits(count - 3, 2);
            } else if (count <= 10) {
                blTree.writeSymbol(Tree._repeat3To10);
                this._huffman.pending.writeBits(count - 3, 3);
            } else {
                blTree.writeSymbol(Tree._repeat11To138);
                this._huffman.pending.writeBits(count - 11, 7);
            }
        }
    }

    public writeSymbol(code: number) {
        this._huffman.pending.writeBits(this._codes![code] & 0xffff, this.length![code]);