SwfChunk ReadChunk()
{
if (m_input.Read(m_buffer, 0, 2) != 2)
{
return(null);
}
int length = m_buffer.ToUInt16(0);
Types id = (Types)(length >> 6);
length &= 0x3F;
if (0x3F == length)
{
length = m_input.ReadInt32();
}
if (Types.DefineSprite == id)
{
length = 4;
}
var chunk = new SwfChunk(id, length);
if (length > 0)
{
if (m_input.Read(chunk.Data, 0, length) < length)
{
return(null);
}
}
return(chunk);
}
IImageDecoder OpenBitsJpeg(SwfChunk chunk)
{
int jpeg_pos = 0;
for (int i = 0; i < chunk.Data.Length - 2; ++i)
{
if (chunk.Data[i] == 0xFF && chunk.Data[i + 1] == 0xD8)
{
jpeg_pos = i;
break;
}
}
var input = new BinMemoryStream(chunk.Data, jpeg_pos, chunk.Data.Length - jpeg_pos);
return(ImageFormatDecoder.Create(input));
}
public LosslessImageDecoder(SwfChunk chunk) : base(new BinMemoryStream(chunk.Data))
{
m_type = chunk.Type;
byte format = chunk.Data[2];
int bpp;
switch (format)
{
case 3:
bpp = 8; Format = PixelFormats.Indexed8;
break;
case 4:
bpp = 16; Format = PixelFormats.Bgr565;
break;
case 5:
bpp = 32;
Format = HasAlpha ? PixelFormats.Bgra32 : PixelFormats.Bgr32;
break;
default: throw new InvalidFormatException();
}
uint width = chunk.Data.ToUInt16(3);
uint height = chunk.Data.ToUInt16(5);
m_colors = 0;
m_data_pos = 7;
if (3 == format)
{
m_colors = chunk.Data[m_data_pos++] + 1;
}
Info = new ImageMetaData {
Width = width, Height = height, BPP = bpp
};
}
public SwfJpeg3Decoder(SwfChunk chunk)
{
m_input = chunk.Data;
m_jpeg_length = m_input.ToInt32(2);
}
public SwfJpeg2Decoder(SwfChunk chunk)
{
m_input = chunk.Data;
}
internal static bool IsSoundStream(SwfChunk chunk)
{
return(chunk.Type == Types.SoundStreamHead ||
chunk.Type == Types.SoundStreamHead2 ||
chunk.Type == Types.SoundStreamBlock);
}