public H264StreamHandler(PesStreamParameters parameters)
: base(parameters)
{
if (null == parameters)
throw new ArgumentNullException(nameof(parameters));
if (null == parameters.PesPacketPool)
throw new ArgumentException("PesPacketPool cannot be null", nameof(parameters));
if (null == parameters.NextHandler)
throw new ArgumentException("NextHandler cannot be null", nameof(parameters));
_pesPacketPool = parameters.PesPacketPool;
_nextHandler = parameters.NextHandler;
_configurator = new H264Configurator(parameters.MediaStreamMetadata, parameters.StreamType.Description);
_parser = new NalUnitParser(ResolveHandler);
}
public H264StreamHandler(PesStreamParameters parameters)
: base(parameters)
{
if (null == parameters)
{
throw new ArgumentNullException("parameters");
}
if (null == parameters.PesPacketPool)
{
throw new ArgumentException("PesPacketPool cannot be null", "parameters");
}
if (null == parameters.NextHandler)
{
throw new ArgumentException("NextHandler cannot be null", "parameters");
}
this._pesPacketPool = parameters.PesPacketPool;
this._nextHandler = parameters.NextHandler;
this._configurator = new H264Configurator(parameters.MediaStreamMetadata, parameters.StreamType.Description);
this._parser = new NalUnitParser(new Func <byte, NalUnitParser.ParserStateHandler>(this.ResolveHandler));
}
static async Task Parse(string filename)
{
var buffer = new byte[MAXNALUSIZE * 4];
var offset = 0;
var length = 0;
var isEof = false;
var logFilename = Path.ChangeExtension(filename, ".log");
if (string.Equals(filename, logFilename, StringComparison.InvariantCultureIgnoreCase))
return;
using (var outputFile = new FileStream(logFilename, FileMode.Create, FileAccess.Write, FileShare.Read, 1024 * 1024, FileOptions.SequentialScan))
using (var output = new StreamWriter(outputFile, NoBomUtf8, 512 * 1024))
{
var localOutput = output;
var rbspDecoder = new RbspDecoder();
rbspDecoder.CompletionHandler += b => PrintNalUnit(localOutput, b.ToArray());
var parser = new NalUnitParser(n => (b, o, l, e) => rbspDecoder.Parse(b, o, l, e));
using (var stream = new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.Read, 512 * 1024, FileOptions.Asynchronous | FileOptions.SequentialScan))
{
for (; ; )
{
var bytesRead = await stream.ReadAsync(buffer, length, buffer.Length - length).ConfigureAwait(false);
if (bytesRead < 1)
{
isEof = true;
if (length < 1)
break;
}
else
length += bytesRead;
while ((isEof && length > 0) || length >= MinRemainingSize)
{
var completedLength = parser.Parse(buffer, offset, length, isEof);
if (completedLength < 1)
{
if (isEof)
return;
break;
}
if (completedLength >= length)
{
offset = 0;
length = 0;
break;
}
offset += completedLength;
length -= completedLength;
}
if (length < 1)
{
offset = 0;
continue;
}
if (offset > 0)
{
Array.Copy(buffer, offset, buffer, 0, length);
offset = 0;
}
}
}
}
}