void Decompress16Stereo(BitStream bs, Stream outputStream)
{
int flag;
flag = bs.ReadBit(); /* DataPresent */
Console.WriteLine(flag == 1 ? "data present" : "data not present");
flag = bs.ReadBit(); /* IsStereo */
Console.WriteLine(flag == 1 ? "stereo" : "mono");
flag = bs.ReadBit(); /* Is16Bits */
Console.WriteLine(flag == 1 ? "16 bits" : "8 bits");
HuffmanTree ll = new HuffmanTree();
HuffmanTree lh = new HuffmanTree();
HuffmanTree rl = new HuffmanTree();
HuffmanTree rh = new HuffmanTree();
ll.Build(bs);
lh.Build(bs);
rl.Build(bs);
rh.Build(bs);
byte[] tmp = new byte[2];
short rightbase;
short leftbase;
tmp[1] = (byte)bs.ReadByte();
tmp[0] = (byte)bs.ReadByte();
rightbase = BitConverter.ToInt16(tmp, 0);
tmp[1] = (byte)bs.ReadByte();
tmp[0] = (byte)bs.ReadByte();
leftbase = BitConverter.ToInt16(tmp, 0);
Console.WriteLine("initial bases = {0}, {1}", leftbase, rightbase);
OutputSample(outputStream, leftbase, rightbase);
while (bs.ReadCount < bs.Length)
{
/* read the huffman encoded deltas */
tmp[0] = (byte)(ll == null ? 0 : ll.Decode(bs));
tmp[1] = (byte)(lh == null ? 0 : lh.Decode(bs));
short leftdelta = BitConverter.ToInt16(tmp, 0);
tmp[0] = (byte)(rl == null ? 0 : rl.Decode(bs));
tmp[1] = (byte)(rh == null ? 0 : rh.Decode(bs));
short rightdelta = BitConverter.ToInt16(tmp, 0);
rightbase += rightdelta;
leftbase += leftdelta;
OutputSample(outputStream, leftbase, rightbase);
}
Console.WriteLine("outputted {0} bytes in samples for this frame.", outputStream.Position);
}
void ReadPaletteChunk(BitStream bs)
{
byte[] new_palette = new byte[256 * 3];
bs.AssertAtByteBoundary();
bs.ZeroReadCount();
int paletteLength = bs.ReadByte();
Console.WriteLine("palette chunk is {0} bytes long", paletteLength * 4);
// byte[] palBuf = new byte[paletteLength * 4 - 1];
// bs.Read (palBuf, 0, palBuf.Length);
// MemoryStream palStream = new MemoryStream (palBuf, false);
BitStream palStream = bs;
int new_index = 0, index = 0;
while (new_index < 256)
{
byte p = (byte)palStream.ReadByte();
if ((p & 0x80) == 0x80)
{
int count = (p & 0x7f) + 1;
// Console.WriteLine ("copy1 {0} entries, from {1} to {2}", count, index, new_index);
Array.Copy(palette, index * 3, new_palette, new_index * 3, count * 3);
index += count;
new_index += count;
}
else if ((p & 0x40) == 0x40)
{
int count = (p & 0x3f) + 1;
int tmp_index = palStream.ReadByte();
// Console.WriteLine ("copy2 {0} entries, from {1} to {2}", count, tmp_index, new_index);
Array.Copy(palette, tmp_index * 3, new_palette, new_index * 3, count * 3);
new_index += count;
}
else if ((p & 0xc0) == 0x00)
{
int b = p & 0x3f;
int g = palStream.ReadByte() & 0x3f;
int r = palStream.ReadByte() & 0x3f;
new_palette [new_index * 3] = palmap[r];
new_palette [new_index * 3 + 1] = palmap[g];
new_palette [new_index * 3 + 2] = palmap[b];
// Console.WriteLine ("Assign palette[{0}] = {1},{2},{3}", new_index,
// palmap[r], palmap[g], palmap[b]);
new_index++;
}
}
palette = new_palette;
// Console.WriteLine ("read {0} bytes toward filling the palette", palBuf.Length + 1);
}
void Decompress8Mono(BitStream bs, Stream outputStream)
{
int flag;
flag = bs.ReadBit(); /* DataPresent */
Console.WriteLine(flag == 1 ? "data present" : "data not present");
flag = bs.ReadBit(); /* Is16Bits */
Console.WriteLine(flag == 1 ? "16 bits" : "8 bits");
flag = bs.ReadBit(); /* IsStereo */
Console.WriteLine(flag == 1 ? "stereo" : "mono");
HuffmanTree t = new HuffmanTree();
byte _base;
t.Build(bs);
_base = (byte)bs.ReadByte();
OutputSample(outputStream, _base);
while (bs.ReadCount < bs.Length)
{
/* read the huffman encoded deltas */
int d = (int)t.Decode(bs);
_base = (byte)(_base + d);
OutputSample(outputStream, _base);
}
Console.WriteLine("outputted {0} bytes in samples for this frame.", outputStream.Position);
}
void Decompress16Mono(BitStream bs, Stream outputStream)
{
int flag;
flag = bs.ReadBit(); /* DataPresent */
Console.WriteLine(flag == 1 ? "data present" : "data not present");
flag = bs.ReadBit(); /* Is16Bits */
Console.WriteLine(flag == 1 ? "16 bits" : "8 bits");
flag = bs.ReadBit(); /* IsStereo */
Console.WriteLine(flag == 1 ? "stereo" : "mono");
HuffmanTree h = new HuffmanTree();
HuffmanTree l = new HuffmanTree();
byte[] _base = new byte[2];
l.Build(bs);
h.Build(bs);
_base[1] = (byte)bs.ReadByte();
_base[0] = (byte)bs.ReadByte();
OutputSample(outputStream, _base);
while (bs.ReadCount < bs.Length)
{
/* read the huffman encoded deltas */
int ld = (int)l.Decode(bs);
int hd = (int)h.Decode(bs);
if (ld + _base[0] > 255)
{
_base[1] += 1;
_base[0] = (byte)(ld + _base[0] - 255);
}
else
{
_base[0] = (byte)(hd + _base[0]);
}
_base[1] = (byte)(hd + _base[1]);
OutputSample(outputStream, _base);
}
Console.WriteLine("outputted {0} bytes in samples for this frame.", outputStream.Position);
}
void Decompress8Stereo(BitStream bs, Stream outputStream)
{
int flag;
flag = bs.ReadBit(); /* DataPresent */
Console.WriteLine(flag == 1 ? "data present" : "data not present");
flag = bs.ReadBit(); /* Is16Bits */
Console.WriteLine(flag == 1 ? "16 bits" : "8 bits");
flag = bs.ReadBit(); /* IsStereo */
Console.WriteLine(flag == 1 ? "stereo" : "mono");
HuffmanTree r = new HuffmanTree();
HuffmanTree l = new HuffmanTree();
byte leftbase;
byte rightbase;
l.Build(bs);
r.Build(bs);
rightbase = (byte)bs.ReadByte();
leftbase = (byte)bs.ReadByte();
OutputSample(outputStream, leftbase, rightbase);
while (bs.ReadCount < bs.Length)
{
/* read the huffman encoded deltas */
int rd = (int)r.Decode(bs);
int ld = (int)l.Decode(bs);
rightbase = (byte)(rightbase + rd);
leftbase = (byte)(leftbase + ld);
OutputSample(outputStream, leftbase, rightbase);
}
Console.WriteLine("outputted {0} bytes in samples for this frame.", outputStream.Position);
}
protected virtual void ReadValue (BitStream bs, HuffmanNode node)
{
node.value = (uint)bs.ReadByte();
}
void Decompress8Mono (BitStream bs, Stream outputStream)
{
int flag;
flag = bs.ReadBit(); /* DataPresent */
Console.WriteLine (flag == 1 ? "data present" : "data not present");
flag = bs.ReadBit(); /* Is16Bits */
Console.WriteLine (flag == 1 ? "16 bits" : "8 bits");
flag = bs.ReadBit(); /* IsStereo */
Console.WriteLine (flag == 1 ? "stereo" : "mono");
HuffmanTree t = new HuffmanTree();
byte _base;
t.Build (bs);
_base = (byte)bs.ReadByte();
OutputSample (outputStream, _base);
while (bs.ReadCount < bs.Length) {
/* read the huffman encoded deltas */
int d = (int)t.Decode (bs);
_base = (byte)(_base + d);
OutputSample (outputStream, _base);
}
Console.WriteLine ("outputted {0} bytes in samples for this frame.", outputStream.Position);
}
void Decompress8Stereo (BitStream bs, Stream outputStream)
{
int flag;
flag = bs.ReadBit(); /* DataPresent */
Console.WriteLine (flag == 1 ? "data present" : "data not present");
flag = bs.ReadBit(); /* Is16Bits */
Console.WriteLine (flag == 1 ? "16 bits" : "8 bits");
flag = bs.ReadBit(); /* IsStereo */
Console.WriteLine (flag == 1 ? "stereo" : "mono");
HuffmanTree r = new HuffmanTree();
HuffmanTree l = new HuffmanTree();
byte leftbase;
byte rightbase;
l.Build (bs);
r.Build (bs);
rightbase = (byte)bs.ReadByte();
leftbase = (byte)bs.ReadByte();
OutputSample (outputStream, leftbase, rightbase);
while (bs.ReadCount < bs.Length) {
/* read the huffman encoded deltas */
int rd = (int)r.Decode (bs);
int ld = (int)l.Decode (bs);
rightbase = (byte)(rightbase + rd);
leftbase = (byte)(leftbase + ld);
OutputSample (outputStream, leftbase, rightbase);
}
Console.WriteLine ("outputted {0} bytes in samples for this frame.", outputStream.Position);
}
void Decompress16Mono (BitStream bs, Stream outputStream)
{
int flag;
flag = bs.ReadBit(); /* DataPresent */
Console.WriteLine (flag == 1 ? "data present" : "data not present");
flag = bs.ReadBit(); /* Is16Bits */
Console.WriteLine (flag == 1 ? "16 bits" : "8 bits");
flag = bs.ReadBit(); /* IsStereo */
Console.WriteLine (flag == 1 ? "stereo" : "mono");
HuffmanTree h = new HuffmanTree();
HuffmanTree l = new HuffmanTree();
byte[] _base = new byte[2];
l.Build (bs);
h.Build (bs);
_base[1] = (byte)bs.ReadByte();
_base[0] = (byte)bs.ReadByte();
OutputSample (outputStream, _base);
while (bs.ReadCount < bs.Length) {
/* read the huffman encoded deltas */
int ld = (int)l.Decode (bs);
int hd = (int)h.Decode (bs);
if (ld + _base[0] > 255) {
_base[1] += 1;
_base[0] = (byte)(ld + _base[0] - 255);
}
else
_base[0] = (byte)(hd + _base[0]);
_base[1] = (byte)(hd + _base[1]);
OutputSample (outputStream, _base);
}
Console.WriteLine ("outputted {0} bytes in samples for this frame.", outputStream.Position);
}
void Decompress16Stereo (BitStream bs, Stream outputStream)
{
int flag;
flag = bs.ReadBit(); /* DataPresent */
Console.WriteLine (flag == 1 ? "data present" : "data not present");
flag = bs.ReadBit(); /* IsStereo */
Console.WriteLine (flag == 1 ? "stereo" : "mono");
flag = bs.ReadBit(); /* Is16Bits */
Console.WriteLine (flag == 1 ? "16 bits" : "8 bits");
HuffmanTree ll = new HuffmanTree();
HuffmanTree lh = new HuffmanTree();
HuffmanTree rl = new HuffmanTree();
HuffmanTree rh = new HuffmanTree();
ll.Build (bs);
lh.Build (bs);
rl.Build (bs);
rh.Build (bs);
byte[] tmp = new byte[2];
short rightbase;
short leftbase;
tmp[1] = (byte)bs.ReadByte();
tmp[0] = (byte)bs.ReadByte();
rightbase = BitConverter.ToInt16 (tmp, 0);
tmp[1] = (byte)bs.ReadByte();
tmp[0] = (byte)bs.ReadByte();
leftbase = BitConverter.ToInt16 (tmp, 0);
Console.WriteLine ("initial bases = {0}, {1}", leftbase, rightbase);
OutputSample (outputStream, leftbase, rightbase);
while (bs.ReadCount < bs.Length) {
/* read the huffman encoded deltas */
tmp[0] = (byte)(ll == null ? 0 : ll.Decode (bs));
tmp[1] = (byte)(lh == null ? 0 : lh.Decode (bs));
short leftdelta = BitConverter.ToInt16 (tmp, 0);
tmp[0] = (byte)(rl == null ? 0 : rl.Decode (bs));
tmp[1] = (byte)(rh == null ? 0 : rh.Decode (bs));
short rightdelta = BitConverter.ToInt16 (tmp, 0);
rightbase += rightdelta;
leftbase += leftdelta;
OutputSample (outputStream, leftbase, rightbase);
}
Console.WriteLine ("outputted {0} bytes in samples for this frame.", outputStream.Position);
}
void ReadPaletteChunk (BitStream bs)
{
byte[] new_palette = new byte[256 * 3];
bs.AssertAtByteBoundary ();
bs.ZeroReadCount ();
int paletteLength = bs.ReadByte();
Console.WriteLine ("palette chunk is {0} bytes long", paletteLength * 4);
// byte[] palBuf = new byte[paletteLength * 4 - 1];
// bs.Read (palBuf, 0, palBuf.Length);
// MemoryStream palStream = new MemoryStream (palBuf, false);
BitStream palStream = bs;
int new_index = 0, index = 0;
while (new_index < 256) {
byte p = (byte)palStream.ReadByte();
if ((p & 0x80) == 0x80) {
int count = (p & 0x7f) + 1;
// Console.WriteLine ("copy1 {0} entries, from {1} to {2}", count, index, new_index);
Array.Copy (palette, index * 3, new_palette, new_index * 3, count * 3);
index += count;
new_index += count;
}
else if ((p & 0x40) == 0x40) {
int count = (p & 0x3f) + 1;
int tmp_index = palStream.ReadByte();
// Console.WriteLine ("copy2 {0} entries, from {1} to {2}", count, tmp_index, new_index);
Array.Copy (palette, tmp_index * 3, new_palette, new_index * 3, count * 3);
new_index += count;
}
else if ((p & 0xc0) == 0x00) {
int b = p & 0x3f;
int g = palStream.ReadByte() & 0x3f;
int r = palStream.ReadByte() & 0x3f;
new_palette [new_index * 3] = palmap[r];
new_palette [new_index * 3 + 1] = palmap[g];
new_palette [new_index * 3 + 2] = palmap[b];
// Console.WriteLine ("Assign palette[{0}] = {1},{2},{3}", new_index,
// palmap[r], palmap[g], palmap[b]);
new_index ++;
}
}
palette = new_palette;
// Console.WriteLine ("read {0} bytes toward filling the palette", palBuf.Length + 1);
}
protected virtual void ReadValue(BitStream bs, HuffmanNode node)
{
node.value = (uint)bs.ReadByte();
}