Update #44 - WebAssembly GC support, fix more WebRTC bugs

sources/wasm-gc-teavm/java/com/jcraft/jorbis/Block.java

@@ -0,0 +1,126 @@
+/* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */
+/* JOrbis
+ * Copyright (C) 2000 ymnk, JCraft,Inc.
+ *  
+ * Written by: 2000 ymnk<ymnk@jcraft.com>
+ *   
+ * Many thanks to 
+ *   Monty <monty@xiph.org> and 
+ *   The XIPHOPHORUS Company http://www.xiph.org/ .
+ * JOrbis has been based on their awesome works, Vorbis codec.
+ *   
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public License
+ * as published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+   
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Library General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Library General Public
+ * License along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+package com.jcraft.jorbis;
+
+import com.jcraft.jogg.*;
+
+public class Block {
+	/// necessary stream state for linking to the framing abstraction
+	float[][] pcm = new float[0][]; // this is a pointer into local storage
+	Buffer opb = new Buffer();
+
+	int lW;
+	int W;
+	int nW;
+	int pcmend;
+	int mode;
+
+	int eofflag;
+	long granulepos;
+	long sequence;
+	DspState vd; // For read-only access of configuration
+
+	// bitmetrics for the frame
+	int glue_bits;
+	int time_bits;
+	int floor_bits;
+	int res_bits;
+
+	public Block(DspState vd) {
+		this.vd = vd;
+		if (vd.analysisp != 0) {
+			opb.writeinit();
+		}
+	}
+
+	public void init(DspState vd) {
+		this.vd = vd;
+	}
+
+	public int clear() {
+		if (vd != null) {
+			if (vd.analysisp != 0) {
+				opb.writeclear();
+			}
+		}
+		return (0);
+	}
+
+	public int synthesis(Packet op) {
+		Info vi = vd.vi;
+
+		// first things first. Make sure decode is ready
+		opb.readinit(op.packet_base, op.packet, op.bytes);
+
+		// Check the packet type
+		if (opb.read(1) != 0) {
+			// Oops. This is not an audio data packet
+			return (-1);
+		}
+
+		// read our mode and pre/post windowsize
+		int _mode = opb.read(vd.modebits);
+		if (_mode == -1)
+			return (-1);
+
+		mode = _mode;
+		W = vi.mode_param[mode].blockflag;
+		if (W != 0) {
+			lW = opb.read(1);
+			nW = opb.read(1);
+			if (nW == -1)
+				return (-1);
+		} else {
+			lW = 0;
+			nW = 0;
+		}
+
+		// more setup
+		granulepos = op.granulepos;
+		sequence = op.packetno - 3; // first block is third packet
+		eofflag = op.e_o_s;
+
+		// alloc pcm passback storage
+		pcmend = vi.blocksizes[W];
+		if (pcm.length < vi.channels) {
+			pcm = new float[vi.channels][];
+		}
+		for (int i = 0; i < vi.channels; i++) {
+			if (pcm[i] == null || pcm[i].length < pcmend) {
+				pcm[i] = new float[pcmend];
+			} else {
+				for (int j = 0; j < pcmend; j++) {
+					pcm[i][j] = 0;
+				}
+			}
+		}
+
+		// unpack_header enforces range checking
+		int type = vi.map_type[vi.mode_param[mode].mapping];
+		return (FuncMapping.mapping_P[type].inverse(this, vd.mode[mode]));
+	}
+}