public override void Write(Tag tag, Writer writer)
{
header.Write(writer);
long bytesToWrite = header.Size;
bool allFramesUnsynchronized = true;
foreach (Frame frame in tag.Frames)
{
long pos0 = writer.Position;
int unsync0 = writer.UnsynchronizationCounter;
frame.Codec.Write(writer, frame);
int unsync1 = writer.UnsynchronizationCounter;
long pos1 = writer.Position;
if (unsync0 == unsync1)
{
allFramesUnsynchronized = false;
}
if (header.size != HeaderV2.sizeUnitinialized)
{
long writtenBytes = pos1 - pos0;
bytesToWrite -= writtenBytes;
if (bytesToWrite < 0)
{
throw new Exception(GetType().Name + ": frame or header sizes wrong");
}
}
}
if (header.size != HeaderV2.sizeUnitinialized)
{
for (long i = bytesToWrite; i > 0; i--)
{
writer.WriteByte(0);
}
}
if (header.VersionMajor == 4)
{
long pos0 = writer.Position;
writer.Seek(0, SeekOrigin.Begin);
header.IsUnsynchronized = allFramesUnsynchronized;
header.Write(writer);
writer.Seek(pos0, SeekOrigin.Begin);
}
}
private static void TestHeaderV2()
{
HeaderV2 header = new HeaderV2();
header.IgnoreUnsupportedFlags = true;
byte[] data =
{
// File identificator
(byte)'I', (byte)'D', (byte)'3',
// Version
3, 0,
// Flags
0xE0,
// Size
0, 0, 0, 0
};
using (Reader reader = new Reader(data))
{
header.Read(reader);
header.CheckVersion(Version.v2_3);
}
UnitTest.Test(header.HeaderSize == 10);
UnitTest.Test(header.VersionMajor == 3);
UnitTest.Test(header.VersionMinor == 0);
UnitTest.Test(header.IsUnsynchronized);
UnitTest.Test(header.HasExtendedHeader);
UnitTest.Test(header.HasExperimentalStage);
using (Writer writer = new Writer())
{
header.Write(writer);
UnitTest.Test(ArrayUtils.IsEqual(writer.OutData, data));
}
}