public async Task ReadAsync(
Stream stream,
IRTMPContentSink sink,
CancellationToken cancel_token)
{
int len = 0;
var bin = new byte[13];
try {
len += await stream.ReadBytesAsync(bin, len, 13 - len, cancel_token).ConfigureAwait(false);
}
catch (EndOfStreamException) {
return;
}
var header = new FLVFileHeader(bin);
if (!header.IsValid)
{
throw new BadDataException();
}
sink.OnFLVHeader(header);
len = 0;
bool eos = false;
while (!eos)
{
try {
len += await stream.ReadBytesAsync(bin, len, 11 - len, cancel_token).ConfigureAwait(false);
var read_valid = false;
var body = new FLVTag(this, bin);
if (body.IsValidHeader)
{
if (await body.ReadTagBodyAsync(stream, cancel_token).ConfigureAwait(false))
{
len = 0;
read_valid = true;
switch (body.Type)
{
case FLVTag.TagType.Audio:
sink.OnAudio(body.ToRTMPMessage());
break;
case FLVTag.TagType.Video:
sink.OnVideo(body.ToRTMPMessage());
break;
case FLVTag.TagType.Script:
sink.OnData(new DataAMF0Message(body.ToRTMPMessage()));
break;
}
}
}
else
{
len += await stream.ReadBytesAsync(bin, len, 13 - len, cancel_token).ConfigureAwait(false);
var new_header = new FLVFileHeader(bin);
if (new_header.IsValid)
{
read_valid = true;
sink.OnFLVHeader(header);
}
}
if (!read_valid)
{
int pos = 1;
for (; pos < len; pos++)
{
var b = bin[pos];
if ((b & 0xC0) == 0 && ((b & 0x1F) == 8 || (b & 0x1F) == 9 || (b & 0x1F) == 18))
{
break;
}
}
if (pos == len)
{
len = 0;
}
else
{
Array.Copy(bin, pos, bin, 0, len - pos);
len -= pos;
}
}
}
catch (EndOfStreamException) {
eos = true;
}
}
}
public bool Read(Stream stream, IRTMPContentSink sink)
{
var processed = false;
var eos = false;
while (!eos) {
retry:
var start_pos = stream.Position;
try {
switch (state) {
case ReaderState.Header:
{
var bin = ReadBytes(stream, 13, out eos);
if (eos) goto error;
var header = new FileHeader(bin);
if (header.IsValid) {
sink.OnFLVHeader();
state = ReaderState.Body;
}
else {
throw new BadDataException();
}
}
break;
case ReaderState.Body:
{
var bin = ReadBytes(stream, 11, out eos);
if (eos) goto error;
var read_valid = false;
var body = new FLVTag(this, bin);
if (body.IsValidHeader) {
if (!body.ReadBody(stream)) { eos = true; goto error; }
if (!body.ReadFooter(stream)) { eos = true; goto error; }
if (body.IsValidFooter) {
read_valid = true;
switch (body.Type) {
case FLVTag.TagType.Audio:
sink.OnAudio(body.ToRTMPMessage());
break;
case FLVTag.TagType.Video:
sink.OnVideo(body.ToRTMPMessage());
break;
case FLVTag.TagType.Script:
sink.OnData(new DataAMF0Message(body.ToRTMPMessage()));
break;
}
}
}
else {
stream.Position = start_pos;
var headerbin = ReadBytes(stream, 13, out eos);
if (eos) goto error;
var header = new FileHeader(headerbin);
if (header.IsValid) {
read_valid = true;
sink.OnFLVHeader();
}
}
if (!read_valid) {
stream.Position = start_pos+1;
var b = stream.ReadByte();
while (true) {
if (b<0) {
eos = true;
goto error;
}
if ((b & 0xC0)==0 && ((b & 0x1F)==8 || (b & 0x1F)==9 || (b & 0x1F)==18)) {
break;
}
b = stream.ReadByte();
}
stream.Position = stream.Position-1;
goto retry;
}
}
break;
}
processed = true;
}
catch (EndOfStreamException) {
stream.Position = start_pos;
eos = true;
}
catch (BadDataException) {
stream.Position = start_pos+1;
}
error:
if (eos) {
stream.Position = start_pos;
eos = true;
}
}
return processed;
}
public bool Read(Stream stream, IRTMPContentSink sink)
{
var processed = false;
var eos = false;
while (!eos)
{
retry:
var start_pos = stream.Position;
try {
switch (state)
{
case ReaderState.Header:
{
var bin = ReadBytes(stream, 13, out eos);
if (eos)
{
goto error;
}
var header = new FLVFileHeader(bin);
if (header.IsValid)
{
sink.OnFLVHeader(header);
state = ReaderState.Body;
}
else
{
throw new BadDataException();
}
}
break;
case ReaderState.Body:
{
var bin = ReadBytes(stream, 11, out eos);
if (eos)
{
goto error;
}
var read_valid = false;
var body = new FLVTag(this, bin);
if (body.IsValidHeader)
{
if (!body.ReadBody(stream))
{
eos = true; goto error;
}
if (!body.ReadFooter(stream))
{
eos = true; goto error;
}
if (body.IsValidFooter)
{
read_valid = true;
switch (body.Type)
{
case FLVTag.TagType.Audio:
sink.OnAudio(body.ToRTMPMessage());
break;
case FLVTag.TagType.Video:
sink.OnVideo(body.ToRTMPMessage());
break;
case FLVTag.TagType.Script:
sink.OnData(new DataAMF0Message(body.ToRTMPMessage()));
break;
}
}
}
else
{
stream.Position = start_pos;
var headerbin = ReadBytes(stream, 13, out eos);
if (eos)
{
goto error;
}
var header = new FLVFileHeader(headerbin);
if (header.IsValid)
{
read_valid = true;
sink.OnFLVHeader(header);
}
}
if (!read_valid)
{
stream.Position = start_pos + 1;
var b = stream.ReadByte();
while (true)
{
if (b < 0)
{
eos = true;
goto error;
}
if ((b & 0xC0) == 0 && ((b & 0x1F) == 8 || (b & 0x1F) == 9 || (b & 0x1F) == 18))
{
break;
}
b = stream.ReadByte();
}
stream.Position = stream.Position - 1;
goto retry;
}
}
break;
}
processed = true;
}
catch (EndOfStreamException) {
stream.Position = start_pos;
eos = true;
}
catch (BadDataException) {
stream.Position = start_pos + 1;
}
error:
if (eos)
{
stream.Position = start_pos;
eos = true;
}
}
return(processed);
}
public async Task ReadAsync(
Stream stream,
IRTMPContentSink sink,
CancellationToken cancel_token)
{
int len = 0;
var bin = new byte[13];
try {
len += await stream.ReadBytesAsync(bin, len, 13-len, cancel_token);
}
catch (EndOfStreamException) {
return;
}
var header = new FileHeader(bin);
if (!header.IsValid) throw new BadDataException();
sink.OnFLVHeader();
len = 0;
bool eos = false;
while (!eos) {
try {
len += await stream.ReadBytesAsync(bin, len, 11-len, cancel_token);
var read_valid = false;
var body = new FLVTag(this, bin);
if (body.IsValidHeader) {
if (await body.ReadTagBodyAsync(stream, cancel_token)) {
len = 0;
read_valid = true;
switch (body.Type) {
case FLVTag.TagType.Audio:
sink.OnAudio(body.ToRTMPMessage());
break;
case FLVTag.TagType.Video:
sink.OnVideo(body.ToRTMPMessage());
break;
case FLVTag.TagType.Script:
sink.OnData(new DataAMF0Message(body.ToRTMPMessage()));
break;
}
}
}
else {
len += await stream.ReadBytesAsync(bin, len, 13-len, cancel_token);
var new_header = new FileHeader(bin);
if (new_header.IsValid) {
read_valid = true;
sink.OnFLVHeader();
}
}
if (!read_valid) {
int pos = 1;
for (; pos<len; pos++) {
var b = bin[pos];
if ((b & 0xC0)==0 && ((b & 0x1F)==8 || (b & 0x1F)==9 || (b & 0x1F)==18)) {
break;
}
}
if (pos==len) {
len = 0;
}
else {
Array.Copy(bin, pos, bin, 0, len-pos);
len -= pos;
}
}
}
catch (EndOfStreamException) {
eos = true;
}
}
}