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

sources/wasm-gc-teavm/java/com/jcraft/jogg/Buffer.java

@@ -0,0 +1,293 @@
+/* -*-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.jogg;
+
+public class Buffer {
+	private static final int BUFFER_INCREMENT = 256;
+
+	private static final int[] mask = { 0x00000000, 0x00000001, 0x00000003, 0x00000007, 0x0000000f, 0x0000001f,
+			0x0000003f, 0x0000007f, 0x000000ff, 0x000001ff, 0x000003ff, 0x000007ff, 0x00000fff, 0x00001fff, 0x00003fff,
+			0x00007fff, 0x0000ffff, 0x0001ffff, 0x0003ffff, 0x0007ffff, 0x000fffff, 0x001fffff, 0x003fffff, 0x007fffff,
+			0x00ffffff, 0x01ffffff, 0x03ffffff, 0x07ffffff, 0x0fffffff, 0x1fffffff, 0x3fffffff, 0x7fffffff,
+			0xffffffff };
+
+	int ptr = 0;
+	byte[] buffer = null;
+	int endbit = 0;
+	int endbyte = 0;
+	int storage = 0;
+
+	public void writeinit() {
+		buffer = new byte[BUFFER_INCREMENT];
+		ptr = 0;
+		buffer[0] = (byte) '\0';
+		storage = BUFFER_INCREMENT;
+	}
+
+	public void write(byte[] s) {
+		for (int i = 0; i < s.length; i++) {
+			if (s[i] == 0)
+				break;
+			write(s[i], 8);
+		}
+	}
+
+	public void read(byte[] s, int bytes) {
+		int i = 0;
+		while (bytes-- != 0) {
+			s[i++] = (byte) (read(8));
+		}
+	}
+
+	void reset() {
+		ptr = 0;
+		buffer[0] = (byte) '\0';
+		endbit = endbyte = 0;
+	}
+
+	public void writeclear() {
+		buffer = null;
+	}
+
+	public void readinit(byte[] buf, int bytes) {
+		readinit(buf, 0, bytes);
+	}
+
+	public void readinit(byte[] buf, int start, int bytes) {
+		ptr = start;
+		buffer = buf;
+		endbit = endbyte = 0;
+		storage = bytes;
+	}
+
+	public void write(int value, int bits) {
+		if (endbyte + 4 >= storage) {
+			byte[] foo = new byte[storage + BUFFER_INCREMENT];
+			System.arraycopy(buffer, 0, foo, 0, storage);
+			buffer = foo;
+			storage += BUFFER_INCREMENT;
+		}
+
+		value &= mask[bits];
+		bits += endbit;
+		buffer[ptr] |= (byte) (value << endbit);
+
+		if (bits >= 8) {
+			buffer[ptr + 1] = (byte) (value >>> (8 - endbit));
+			if (bits >= 16) {
+				buffer[ptr + 2] = (byte) (value >>> (16 - endbit));
+				if (bits >= 24) {
+					buffer[ptr + 3] = (byte) (value >>> (24 - endbit));
+					if (bits >= 32) {
+						if (endbit > 0)
+							buffer[ptr + 4] = (byte) (value >>> (32 - endbit));
+						else
+							buffer[ptr + 4] = 0;
+					}
+				}
+			}
+		}
+
+		endbyte += bits / 8;
+		ptr += bits / 8;
+		endbit = bits & 7;
+	}
+
+	public int look(int bits) {
+		int ret;
+		int m = mask[bits];
+
+		bits += endbit;
+
+		if (endbyte + 4 >= storage) {
+			if (endbyte + (bits - 1) / 8 >= storage)
+				return (-1);
+		}
+
+		ret = ((buffer[ptr]) & 0xff) >>> endbit;
+		if (bits > 8) {
+			ret |= ((buffer[ptr + 1]) & 0xff) << (8 - endbit);
+			if (bits > 16) {
+				ret |= ((buffer[ptr + 2]) & 0xff) << (16 - endbit);
+				if (bits > 24) {
+					ret |= ((buffer[ptr + 3]) & 0xff) << (24 - endbit);
+					if (bits > 32 && endbit != 0) {
+						ret |= ((buffer[ptr + 4]) & 0xff) << (32 - endbit);
+					}
+				}
+			}
+		}
+		return (m & ret);
+	}
+
+	public int look1() {
+		if (endbyte >= storage)
+			return (-1);
+		return ((buffer[ptr] >> endbit) & 1);
+	}
+
+	public void adv(int bits) {
+		bits += endbit;
+		ptr += bits / 8;
+		endbyte += bits / 8;
+		endbit = bits & 7;
+	}
+
+	public void adv1() {
+		++endbit;
+		if (endbit > 7) {
+			endbit = 0;
+			ptr++;
+			endbyte++;
+		}
+	}
+
+	public int read(int bits) {
+		int ret;
+		int m = mask[bits];
+
+		bits += endbit;
+
+		if (endbyte + 4 >= storage) {
+			ret = -1;
+			if (endbyte + (bits - 1) / 8 >= storage) {
+				ptr += bits / 8;
+				endbyte += bits / 8;
+				endbit = bits & 7;
+				return (ret);
+			}
+		}
+
+		ret = ((buffer[ptr]) & 0xff) >>> endbit;
+		if (bits > 8) {
+			ret |= ((buffer[ptr + 1]) & 0xff) << (8 - endbit);
+			if (bits > 16) {
+				ret |= ((buffer[ptr + 2]) & 0xff) << (16 - endbit);
+				if (bits > 24) {
+					ret |= ((buffer[ptr + 3]) & 0xff) << (24 - endbit);
+					if (bits > 32 && endbit != 0) {
+						ret |= ((buffer[ptr + 4]) & 0xff) << (32 - endbit);
+					}
+				}
+			}
+		}
+
+		ret &= m;
+
+		ptr += bits / 8;
+		endbyte += bits / 8;
+		endbit = bits & 7;
+		return (ret);
+	}
+
+	public int readB(int bits) {
+		int ret;
+		int m = 32 - bits;
+
+		bits += endbit;
+
+		if (endbyte + 4 >= storage) {
+			/* not the main path */
+			ret = -1;
+			if (endbyte * 8 + bits > storage * 8) {
+				ptr += bits / 8;
+				endbyte += bits / 8;
+				endbit = bits & 7;
+				return (ret);
+			}
+		}
+
+		ret = (buffer[ptr] & 0xff) << (24 + endbit);
+		if (bits > 8) {
+			ret |= (buffer[ptr + 1] & 0xff) << (16 + endbit);
+			if (bits > 16) {
+				ret |= (buffer[ptr + 2] & 0xff) << (8 + endbit);
+				if (bits > 24) {
+					ret |= (buffer[ptr + 3] & 0xff) << (endbit);
+					if (bits > 32 && (endbit != 0))
+						ret |= (buffer[ptr + 4] & 0xff) >> (8 - endbit);
+				}
+			}
+		}
+		ret = (ret >>> (m >> 1)) >>> ((m + 1) >> 1);
+
+		ptr += bits / 8;
+		endbyte += bits / 8;
+		endbit = bits & 7;
+		return (ret);
+	}
+
+	public int read1() {
+		int ret;
+		if (endbyte >= storage) {
+			ret = -1;
+			endbit++;
+			if (endbit > 7) {
+				endbit = 0;
+				ptr++;
+				endbyte++;
+			}
+			return (ret);
+		}
+
+		ret = (buffer[ptr] >> endbit) & 1;
+
+		endbit++;
+		if (endbit > 7) {
+			endbit = 0;
+			ptr++;
+			endbyte++;
+		}
+		return (ret);
+	}
+
+	public int bytes() {
+		return (endbyte + (endbit + 7) / 8);
+	}
+
+	public int bits() {
+		return (endbyte * 8 + endbit);
+	}
+
+	public byte[] buffer() {
+		return (buffer);
+	}
+
+	public static int ilog(int v) {
+		int ret = 0;
+		while (v > 0) {
+			ret++;
+			v >>>= 1;
+		}
+		return (ret);
+	}
+
+	public static void report(String in) {
+		System.err.println(in);
+		System.exit(1);
+	}
+}

sources/wasm-gc-teavm/java/com/jcraft/jogg/Packet.java

@@ -0,0 +1,45 @@
+/* -*-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.jogg;
+
+public class Packet {
+	public byte[] packet_base;
+	public int packet;
+	public int bytes;
+	public int b_o_s;
+	public int e_o_s;
+
+	public long granulepos;
+
+	/**
+	 * sequence number for decode; the framing knows where there's a hole in the
+	 * data, but we need coupling so that the codec (which is in a seperate
+	 * abstraction layer) also knows about the gap
+	 */
+	public long packetno;
+
+}

sources/wasm-gc-teavm/java/com/jcraft/jogg/Page.java

@@ -0,0 +1,130 @@
+/* -*-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.jogg;
+
+public class Page {
+	private static int[] crc_lookup = new int[256];
+	static {
+		for (int i = 0; i < crc_lookup.length; i++) {
+			crc_lookup[i] = crc_entry(i);
+		}
+	}
+
+	private static int crc_entry(int index) {
+		int r = index << 24;
+		for (int i = 0; i < 8; i++) {
+			if ((r & 0x80000000) != 0) {
+				r = (r << 1) ^ 0x04c11db7; /*
+											 * The same as the ethernet generator polynomial, although we use an
+											 * unreflected alg and an init/final of 0, not 0xffffffff
+											 */
+			} else {
+				r <<= 1;
+			}
+		}
+		return (r & 0xffffffff);
+	}
+
+	public byte[] header_base;
+	public int header;
+	public int header_len;
+	public byte[] body_base;
+	public int body;
+	public int body_len;
+
+	int version() {
+		return header_base[header + 4] & 0xff;
+	}
+
+	int continued() {
+		return (header_base[header + 5] & 0x01);
+	}
+
+	public int bos() {
+		return (header_base[header + 5] & 0x02);
+	}
+
+	public int eos() {
+		return (header_base[header + 5] & 0x04);
+	}
+
+	public long granulepos() {
+		long foo = header_base[header + 13] & 0xff;
+		foo = (foo << 8) | (header_base[header + 12] & 0xff);
+		foo = (foo << 8) | (header_base[header + 11] & 0xff);
+		foo = (foo << 8) | (header_base[header + 10] & 0xff);
+		foo = (foo << 8) | (header_base[header + 9] & 0xff);
+		foo = (foo << 8) | (header_base[header + 8] & 0xff);
+		foo = (foo << 8) | (header_base[header + 7] & 0xff);
+		foo = (foo << 8) | (header_base[header + 6] & 0xff);
+		return (foo);
+	}
+
+	public int serialno() {
+		return (header_base[header + 14] & 0xff) | ((header_base[header + 15] & 0xff) << 8)
+				| ((header_base[header + 16] & 0xff) << 16) | ((header_base[header + 17] & 0xff) << 24);
+	}
+
+	int pageno() {
+		return (header_base[header + 18] & 0xff) | ((header_base[header + 19] & 0xff) << 8)
+				| ((header_base[header + 20] & 0xff) << 16) | ((header_base[header + 21] & 0xff) << 24);
+	}
+
+	void checksum() {
+		int crc_reg = 0;
+
+		for (int i = 0; i < header_len; i++) {
+			crc_reg = (crc_reg << 8) ^ crc_lookup[((crc_reg >>> 24) & 0xff) ^ (header_base[header + i] & 0xff)];
+		}
+		for (int i = 0; i < body_len; i++) {
+			crc_reg = (crc_reg << 8) ^ crc_lookup[((crc_reg >>> 24) & 0xff) ^ (body_base[body + i] & 0xff)];
+		}
+		header_base[header + 22] = (byte) crc_reg;
+		header_base[header + 23] = (byte) (crc_reg >>> 8);
+		header_base[header + 24] = (byte) (crc_reg >>> 16);
+		header_base[header + 25] = (byte) (crc_reg >>> 24);
+	}
+
+	public Page copy() {
+		return copy(new Page());
+	}
+
+	public Page copy(Page p) {
+		byte[] tmp = new byte[header_len];
+		System.arraycopy(header_base, header, tmp, 0, header_len);
+		p.header_len = header_len;
+		p.header_base = tmp;
+		p.header = 0;
+		tmp = new byte[body_len];
+		System.arraycopy(body_base, body, tmp, 0, body_len);
+		p.body_len = body_len;
+		p.body_base = tmp;
+		p.body = 0;
+		return p;
+	}
+
+}

sources/wasm-gc-teavm/java/com/jcraft/jogg/StreamState.java

@@ -0,0 +1,538 @@
+/* -*-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.jogg;
+
+public class StreamState {
+	byte[] body_data; /* bytes from packet bodies */
+	int body_storage; /* storage elements allocated */
+	int body_fill; /* elements stored; fill mark */
+	private int body_returned; /* elements of fill returned */
+
+	int[] lacing_vals; /* The values that will go to the segment table */
+	long[] granule_vals; /*
+							 * pcm_pos values for headers. Not compact this way, but it is simple coupled to
+							 * the lacing fifo
+							 */
+	int lacing_storage;
+	int lacing_fill;
+	int lacing_packet;
+	int lacing_returned;
+
+	byte[] header = new byte[282]; /* working space for header encode */
+	int header_fill;
+
+	public int e_o_s; /*
+						 * set when we have buffered the last packet in the logical bitstream
+						 */
+	int b_o_s; /*
+				 * set after we've written the initial page of a logical bitstream
+				 */
+	int serialno;
+	int pageno;
+	long packetno; /*
+					 * sequence number for decode; the framing knows where there's a hole in the
+					 * data, but we need coupling so that the codec (which is in a seperate
+					 * abstraction layer) also knows about the gap
+					 */
+	long granulepos;
+
+	public StreamState() {
+		init();
+	}
+
+	StreamState(int serialno) {
+		this();
+		init(serialno);
+	}
+
+	void init() {
+		body_storage = 16 * 1024;
+		body_data = new byte[body_storage];
+		lacing_storage = 1024;
+		lacing_vals = new int[lacing_storage];
+		granule_vals = new long[lacing_storage];
+	}
+
+	public void init(int serialno) {
+		if (body_data == null) {
+			init();
+		} else {
+			for (int i = 0; i < body_data.length; i++)
+				body_data[i] = 0;
+			for (int i = 0; i < lacing_vals.length; i++)
+				lacing_vals[i] = 0;
+			for (int i = 0; i < granule_vals.length; i++)
+				granule_vals[i] = 0;
+		}
+		this.serialno = serialno;
+	}
+
+	public void clear() {
+		body_data = null;
+		lacing_vals = null;
+		granule_vals = null;
+	}
+
+	void destroy() {
+		clear();
+	}
+
+	void body_expand(int needed) {
+		if (body_storage <= body_fill + needed) {
+			body_storage += (needed + 1024);
+			byte[] foo = new byte[body_storage];
+			System.arraycopy(body_data, 0, foo, 0, body_data.length);
+			body_data = foo;
+		}
+	}
+
+	void lacing_expand(int needed) {
+		if (lacing_storage <= lacing_fill + needed) {
+			lacing_storage += (needed + 32);
+			int[] foo = new int[lacing_storage];
+			System.arraycopy(lacing_vals, 0, foo, 0, lacing_vals.length);
+			lacing_vals = foo;
+
+			long[] bar = new long[lacing_storage];
+			System.arraycopy(granule_vals, 0, bar, 0, granule_vals.length);
+			granule_vals = bar;
+		}
+	}
+
+	/* submit data to the internal buffer of the framing engine */
+	public int packetin(Packet op) {
+		int lacing_val = op.bytes / 255 + 1;
+
+		if (body_returned != 0) {
+			/*
+			 * advance packet data according to the body_returned pointer. We had to keep it
+			 * around to return a pointer into the buffer last call
+			 */
+
+			body_fill -= body_returned;
+			if (body_fill != 0) {
+				System.arraycopy(body_data, body_returned, body_data, 0, body_fill);
+			}
+			body_returned = 0;
+		}
+
+		/* make sure we have the buffer storage */
+		body_expand(op.bytes);
+		lacing_expand(lacing_val);
+
+		/*
+		 * Copy in the submitted packet. Yes, the copy is a waste; this is the liability
+		 * of overly clean abstraction for the time being. It will actually be fairly
+		 * easy to eliminate the extra copy in the future
+		 */
+
+		System.arraycopy(op.packet_base, op.packet, body_data, body_fill, op.bytes);
+		body_fill += op.bytes;
+
+		/* Store lacing vals for this packet */
+		int j;
+		for (j = 0; j < lacing_val - 1; j++) {
+			lacing_vals[lacing_fill + j] = 255;
+			granule_vals[lacing_fill + j] = granulepos;
+		}
+		lacing_vals[lacing_fill + j] = (op.bytes) % 255;
+		granulepos = granule_vals[lacing_fill + j] = op.granulepos;
+
+		/* flag the first segment as the beginning of the packet */
+		lacing_vals[lacing_fill] |= 0x100;
+
+		lacing_fill += lacing_val;
+
+		/* for the sake of completeness */
+		packetno++;
+
+		if (op.e_o_s != 0)
+			e_o_s = 1;
+		return (0);
+	}
+
+	public int packetout(Packet op) {
+
+		/*
+		 * The last part of decode. We have the stream broken into packet segments. Now
+		 * we need to group them into packets (or return the out of sync markers)
+		 */
+
+		int ptr = lacing_returned;
+
+		if (lacing_packet <= ptr) {
+			return (0);
+		}
+
+		if ((lacing_vals[ptr] & 0x400) != 0) {
+			/* We lost sync here; let the app know */
+			lacing_returned++;
+
+			/*
+			 * we need to tell the codec there's a gap; it might need to handle previous
+			 * packet dependencies.
+			 */
+			packetno++;
+			return (-1);
+		}
+
+		/* Gather the whole packet. We'll have no holes or a partial packet */
+		{
+			int size = lacing_vals[ptr] & 0xff;
+			int bytes = 0;
+
+			op.packet_base = body_data;
+			op.packet = body_returned;
+			op.e_o_s = lacing_vals[ptr] & 0x200; /* last packet of the stream? */
+			op.b_o_s = lacing_vals[ptr] & 0x100; /* first packet of the stream? */
+			bytes += size;
+
+			while (size == 255) {
+				int val = lacing_vals[++ptr];
+				size = val & 0xff;
+				if ((val & 0x200) != 0)
+					op.e_o_s = 0x200;
+				bytes += size;
+			}
+
+			op.packetno = packetno;
+			op.granulepos = granule_vals[ptr];
+			op.bytes = bytes;
+
+			body_returned += bytes;
+
+			lacing_returned = ptr + 1;
+		}
+		packetno++;
+		return (1);
+	}
+
+	// add the incoming page to the stream state; we decompose the page
+	// into packet segments here as well.
+
+	public int pagein(Page og) {
+		byte[] header_base = og.header_base;
+		int header = og.header;
+		byte[] body_base = og.body_base;
+		int body = og.body;
+		int bodysize = og.body_len;
+		int segptr = 0;
+
+		int version = og.version();
+		int continued = og.continued();
+		int bos = og.bos();
+		int eos = og.eos();
+		long granulepos = og.granulepos();
+		int _serialno = og.serialno();
+		int _pageno = og.pageno();
+		int segments = header_base[header + 26] & 0xff;
+
+		// clean up 'returned data'
+		{
+			int lr = lacing_returned;
+			int br = body_returned;
+
+			// body data
+			if (br != 0) {
+				body_fill -= br;
+				if (body_fill != 0) {
+					System.arraycopy(body_data, br, body_data, 0, body_fill);
+				}
+				body_returned = 0;
+			}
+
+			if (lr != 0) {
+				// segment table
+				if ((lacing_fill - lr) != 0) {
+					System.arraycopy(lacing_vals, lr, lacing_vals, 0, lacing_fill - lr);
+					System.arraycopy(granule_vals, lr, granule_vals, 0, lacing_fill - lr);
+				}
+				lacing_fill -= lr;
+				lacing_packet -= lr;
+				lacing_returned = 0;
+			}
+		}
+
+		// check the serial number
+		if (_serialno != serialno)
+			return (-1);
+		if (version > 0)
+			return (-1);
+
+		lacing_expand(segments + 1);
+
+		// are we in sequence?
+		if (_pageno != pageno) {
+			int i;
+
+			// unroll previous partial packet (if any)
+			for (i = lacing_packet; i < lacing_fill; i++) {
+				body_fill -= lacing_vals[i] & 0xff;
+				// System.out.println("??");
+			}
+			lacing_fill = lacing_packet;
+
+			// make a note of dropped data in segment table
+			if (pageno != -1) {
+				lacing_vals[lacing_fill++] = 0x400;
+				lacing_packet++;
+			}
+
+			// are we a 'continued packet' page? If so, we'll need to skip
+			// some segments
+			if (continued != 0) {
+				bos = 0;
+				for (; segptr < segments; segptr++) {
+					int val = (header_base[header + 27 + segptr] & 0xff);
+					body += val;
+					bodysize -= val;
+					if (val < 255) {
+						segptr++;
+						break;
+					}
+				}
+			}
+		}
+
+		if (bodysize != 0) {
+			body_expand(bodysize);
+			System.arraycopy(body_base, body, body_data, body_fill, bodysize);
+			body_fill += bodysize;
+		}
+
+		{
+			int saved = -1;
+			while (segptr < segments) {
+				int val = (header_base[header + 27 + segptr] & 0xff);
+				lacing_vals[lacing_fill] = val;
+				granule_vals[lacing_fill] = -1;
+
+				if (bos != 0) {
+					lacing_vals[lacing_fill] |= 0x100;
+					bos = 0;
+				}
+
+				if (val < 255)
+					saved = lacing_fill;
+
+				lacing_fill++;
+				segptr++;
+
+				if (val < 255)
+					lacing_packet = lacing_fill;
+			}
+
+			/* set the granulepos on the last pcmval of the last full packet */
+			if (saved != -1) {
+				granule_vals[saved] = granulepos;
+			}
+		}
+
+		if (eos != 0) {
+			e_o_s = 1;
+			if (lacing_fill > 0)
+				lacing_vals[lacing_fill - 1] |= 0x200;
+		}
+
+		pageno = _pageno + 1;
+		return (0);
+	}
+
+	/*
+	 * This will flush remaining packets into a page (returning nonzero), even if
+	 * there is not enough data to trigger a flush normally (undersized page). If
+	 * there are no packets or partial packets to flush, ogg_stream_flush returns 0.
+	 * Note that ogg_stream_flush will try to flush a normal sized page like
+	 * ogg_stream_pageout; a call to ogg_stream_flush does not gurantee that all
+	 * packets have flushed. Only a return value of 0 from ogg_stream_flush
+	 * indicates all packet data is flushed into pages.
+	 * 
+	 * ogg_stream_page will flush the last page in a stream even if it's undersized;
+	 * you almost certainly want to use ogg_stream_pageout (and *not*
+	 * ogg_stream_flush) unless you need to flush an undersized page in the middle
+	 * of a stream for some reason.
+	 */
+
+	public int flush(Page og) {
+
+		int i;
+		int vals = 0;
+		int maxvals = (lacing_fill > 255 ? 255 : lacing_fill);
+		int bytes = 0;
+		int acc = 0;
+		long granule_pos = granule_vals[0];
+
+		if (maxvals == 0)
+			return (0);
+
+		/* construct a page */
+		/* decide how many segments to include */
+
+		/*
+		 * If this is the initial header case, the first page must only include the
+		 * initial header packet
+		 */
+		if (b_o_s == 0) { /* 'initial header page' case */
+			granule_pos = 0;
+			for (vals = 0; vals < maxvals; vals++) {
+				if ((lacing_vals[vals] & 0x0ff) < 255) {
+					vals++;
+					break;
+				}
+			}
+		} else {
+			for (vals = 0; vals < maxvals; vals++) {
+				if (acc > 4096)
+					break;
+				acc += (lacing_vals[vals] & 0x0ff);
+				granule_pos = granule_vals[vals];
+			}
+		}
+
+		/* construct the header in temp storage */
+		System.arraycopy("OggS".getBytes(), 0, header, 0, 4);
+
+		/* stream structure version */
+		header[4] = 0x00;
+
+		/* continued packet flag? */
+		header[5] = 0x00;
+		if ((lacing_vals[0] & 0x100) == 0)
+			header[5] |= 0x01;
+		/* first page flag? */
+		if (b_o_s == 0)
+			header[5] |= 0x02;
+		/* last page flag? */
+		if (e_o_s != 0 && lacing_fill == vals)
+			header[5] |= 0x04;
+		b_o_s = 1;
+
+		/* 64 bits of PCM position */
+		for (i = 6; i < 14; i++) {
+			header[i] = (byte) granule_pos;
+			granule_pos >>>= 8;
+		}
+
+		/* 32 bits of stream serial number */
+		{
+			int _serialno = serialno;
+			for (i = 14; i < 18; i++) {
+				header[i] = (byte) _serialno;
+				_serialno >>>= 8;
+			}
+		}
+
+		/*
+		 * 32 bits of page counter (we have both counter and page header because this
+		 * val can roll over)
+		 */
+		if (pageno == -1)
+			pageno = 0; /*
+						 * because someone called stream_reset; this would be a strange thing to do in
+						 * an encode stream, but it has plausible uses
+						 */
+		{
+			int _pageno = pageno++;
+			for (i = 18; i < 22; i++) {
+				header[i] = (byte) _pageno;
+				_pageno >>>= 8;
+			}
+		}
+
+		/* zero for computation; filled in later */
+		header[22] = 0;
+		header[23] = 0;
+		header[24] = 0;
+		header[25] = 0;
+
+		/* segment table */
+		header[26] = (byte) vals;
+		for (i = 0; i < vals; i++) {
+			header[i + 27] = (byte) lacing_vals[i];
+			bytes += (header[i + 27] & 0xff);
+		}
+
+		/* set pointers in the ogg_page struct */
+		og.header_base = header;
+		og.header = 0;
+		og.header_len = header_fill = vals + 27;
+		og.body_base = body_data;
+		og.body = body_returned;
+		og.body_len = bytes;
+
+		/* advance the lacing data and set the body_returned pointer */
+
+		lacing_fill -= vals;
+		System.arraycopy(lacing_vals, vals, lacing_vals, 0, lacing_fill * 4);
+		System.arraycopy(granule_vals, vals, granule_vals, 0, lacing_fill * 8);
+		body_returned += bytes;
+
+		/* calculate the checksum */
+
+		og.checksum();
+
+		/* done */
+		return (1);
+	}
+
+	/*
+	 * This constructs pages from buffered packet segments. The pointers returned
+	 * are to static buffers; do not free. The returned buffers are good only until
+	 * the next call (using the same ogg_stream_state)
+	 */
+	public int pageout(Page og) {
+		if ((e_o_s != 0 && lacing_fill != 0) || /* 'were done, now flush' case */
+				body_fill - body_returned > 4096 || /* 'page nominal size' case */
+				lacing_fill >= 255 || /* 'segment table full' case */
+				(lacing_fill != 0 && b_o_s == 0)) { /* 'initial header page' case */
+			return flush(og);
+		}
+		return 0;
+	}
+
+	public int eof() {
+		return e_o_s;
+	}
+
+	public int reset() {
+		body_fill = 0;
+		body_returned = 0;
+
+		lacing_fill = 0;
+		lacing_packet = 0;
+		lacing_returned = 0;
+
+		header_fill = 0;
+
+		e_o_s = 0;
+		b_o_s = 0;
+		pageno = -1;
+		packetno = 0;
+		granulepos = 0;
+		return (0);
+	}
+}

sources/wasm-gc-teavm/java/com/jcraft/jogg/SyncState.java

@@ -0,0 +1,273 @@
+/* -*-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.jogg;
+
+// DECODING PRIMITIVES: packet streaming layer
+
+// This has two layers to place more of the multi-serialno and paging
+// control in the application's hands.  First, we expose a data buffer
+// using ogg_decode_buffer().  The app either copies into the
+// buffer, or passes it directly to read(), etc.  We then call
+// ogg_decode_wrote() to tell how many bytes we just added.
+//
+// Pages are returned (pointers into the buffer in ogg_sync_state)
+// by ogg_decode_stream().  The page is then submitted to
+// ogg_decode_page() along with the appropriate
+// ogg_stream_state* (ie, matching serialno).  We then get raw
+// packets out calling ogg_stream_packet() with a
+// ogg_stream_state.  See the 'frame-prog.txt' docs for details and
+// example code.
+
+public class SyncState {
+
+	public byte[] data;
+	int storage;
+	int fill;
+	int returned;
+
+	int unsynced;
+	int headerbytes;
+	int bodybytes;
+
+	public int clear() {
+		data = null;
+		return (0);
+	}
+
+	public int buffer(int size) {
+		// first, clear out any space that has been previously returned
+		if (returned != 0) {
+			fill -= returned;
+			if (fill > 0) {
+				System.arraycopy(data, returned, data, 0, fill);
+			}
+			returned = 0;
+		}
+
+		if (size > storage - fill) {
+			// We need to extend the internal buffer
+			int newsize = size + fill + 4096; // an extra page to be nice
+			if (data != null) {
+				byte[] foo = new byte[newsize];
+				System.arraycopy(data, 0, foo, 0, data.length);
+				data = foo;
+			} else {
+				data = new byte[newsize];
+			}
+			storage = newsize;
+		}
+
+		return (fill);
+	}
+
+	public int wrote(int bytes) {
+		if (fill + bytes > storage)
+			return (-1);
+		fill += bytes;
+		return (0);
+	}
+
+	// sync the stream. This is meant to be useful for finding page
+	// boundaries.
+	//
+	// return values for this:
+	// -n) skipped n bytes
+	// 0) page not ready; more data (no bytes skipped)
+	// n) page synced at current location; page length n bytes
+	private Page pageseek = new Page();
+	private byte[] chksum = new byte[4];
+
+	public int pageseek(Page og) {
+		int page = returned;
+		int next;
+		int bytes = fill - returned;
+
+		if (headerbytes == 0) {
+			int _headerbytes, i;
+			if (bytes < 27)
+				return (0); // not enough for a header
+
+			/* verify capture pattern */
+			if (data[page] != 'O' || data[page + 1] != 'g' || data[page + 2] != 'g' || data[page + 3] != 'S') {
+				headerbytes = 0;
+				bodybytes = 0;
+
+				// search for possible capture
+				next = 0;
+				for (int ii = 0; ii < bytes - 1; ii++) {
+					if (data[page + 1 + ii] == 'O') {
+						next = page + 1 + ii;
+						break;
+					}
+				}
+				// next=memchr(page+1,'O',bytes-1);
+				if (next == 0)
+					next = fill;
+
+				returned = next;
+				return (-(next - page));
+			}
+			_headerbytes = (data[page + 26] & 0xff) + 27;
+			if (bytes < _headerbytes)
+				return (0); // not enough for header + seg table
+
+			// count up body length in the segment table
+
+			for (i = 0; i < (data[page + 26] & 0xff); i++) {
+				bodybytes += (data[page + 27 + i] & 0xff);
+			}
+			headerbytes = _headerbytes;
+		}
+
+		if (bodybytes + headerbytes > bytes)
+			return (0);
+
+		// The whole test page is buffered. Verify the checksum
+		synchronized (chksum) {
+			// Grab the checksum bytes, set the header field to zero
+
+			System.arraycopy(data, page + 22, chksum, 0, 4);
+			data[page + 22] = 0;
+			data[page + 23] = 0;
+			data[page + 24] = 0;
+			data[page + 25] = 0;
+
+			// set up a temp page struct and recompute the checksum
+			Page log = pageseek;
+			log.header_base = data;
+			log.header = page;
+			log.header_len = headerbytes;
+
+			log.body_base = data;
+			log.body = page + headerbytes;
+			log.body_len = bodybytes;
+			log.checksum();
+
+			// Compare
+			if (chksum[0] != data[page + 22] || chksum[1] != data[page + 23] || chksum[2] != data[page + 24]
+					|| chksum[3] != data[page + 25]) {
+				// D'oh. Mismatch! Corrupt page (or miscapture and not a page at all)
+				// replace the computed checksum with the one actually read in
+				System.arraycopy(chksum, 0, data, page + 22, 4);
+				// Bad checksum. Lose sync */
+
+				headerbytes = 0;
+				bodybytes = 0;
+				// search for possible capture
+				next = 0;
+				for (int ii = 0; ii < bytes - 1; ii++) {
+					if (data[page + 1 + ii] == 'O') {
+						next = page + 1 + ii;
+						break;
+					}
+				}
+				// next=memchr(page+1,'O',bytes-1);
+				if (next == 0)
+					next = fill;
+				returned = next;
+				return (-(next - page));
+			}
+		}
+
+		// yes, have a whole page all ready to go
+		{
+			page = returned;
+
+			if (og != null) {
+				og.header_base = data;
+				og.header = page;
+				og.header_len = headerbytes;
+				og.body_base = data;
+				og.body = page + headerbytes;
+				og.body_len = bodybytes;
+			}
+
+			unsynced = 0;
+			returned += (bytes = headerbytes + bodybytes);
+			headerbytes = 0;
+			bodybytes = 0;
+			return (bytes);
+		}
+	}
+
+	// sync the stream and get a page. Keep trying until we find a page.
+	// Supress 'sync errors' after reporting the first.
+	//
+	// return values:
+	// -1) recapture (hole in data)
+	// 0) need more data
+	// 1) page returned
+	//
+	// Returns pointers into buffered data; invalidated by next call to
+	// _stream, _clear, _init, or _buffer
+
+	public int pageout(Page og) {
+		// all we need to do is verify a page at the head of the stream
+		// buffer. If it doesn't verify, we look for the next potential
+		// frame
+
+		while (true) {
+			int ret = pageseek(og);
+			if (ret > 0) {
+				// have a page
+				return (1);
+			}
+			if (ret == 0) {
+				// need more data
+				return (0);
+			}
+
+			// head did not start a synced page... skipped some bytes
+			if (unsynced == 0) {
+				unsynced = 1;
+				return (-1);
+			}
+			// loop. keep looking
+		}
+	}
+
+	// clear things to an initial state. Good to call, eg, before seeking
+	public int reset() {
+		fill = 0;
+		returned = 0;
+		unsynced = 0;
+		headerbytes = 0;
+		bodybytes = 0;
+		return (0);
+	}
+
+	public void init() {
+	}
+
+	public int getDataOffset() {
+		return returned;
+	}
+
+	public int getBufferOffset() {
+		return fill;
+	}
+}