public ErrorCode process(ISample sample)
{
if (sample == null)
{
return ErrorCode.NullReference;
}
ErrorCode er = ErrorCode.Success;
if (sample.endTime() < sample.seekTime())
{
//drop frame as we should not render it
return ErrorCode.Success;
}
strm_.refresh(sample.pointee());
while (mpaDecode())
{
//create sampe here and deliver to next filter
byte[] buff = new byte[samples_.Length * sizeof(short)];
System.Buffer.BlockCopy(samples_, 0, buff, 0, buff.Length);
ISample decoded = new Sample(buff, sample.startTime(), sample.endTime(), sample.seekTime(), sample.isDiscontinuous());
if (next_ != null)
{
er = next_.process(decoded);
}
if (renderer_ != null)
{
er = renderer_.process(decoded);
}
}
return er;
}
public ErrorCode nextSample(int streamId, out ISample sample)
{
UInt64 length = reader_.size() - pos_;
sample = null;
if (length == 0)
{
return ErrorCode.EndOfStream;
}
UInt64 bufSize = Math.Min(BLOCK_SIZE, length);
byte[] buf = new byte[bufSize];
Int32 size = (Int32)bufSize;
reader_.read(buf, ref size);
UInt64 start = (pos_ - 44) * 800000 / ((UInt64)frequency_ * (UInt64)channels_ * (UInt64)bps_);
UInt64 stop = (pos_ - 44 + bufSize) * 800000 / ((UInt64)frequency_ * (UInt64)channels_ * (UInt64)bps_);
sample = new Sample(buf, start, stop, seekTime_, discontinuous_);
pos_ += bufSize;
discontinuous_ = false;
return ErrorCode.Success;
}
public ErrorCode nextSample(int streamId, out ISample sample)
{
sample = null;
MPAHeader hdr = new MPAHeader();
hdr.valid = false;
byte[] tmp = new byte[4];
while (!hdr.valid)
{
tmp[0] = tmp[1];
tmp[1] = tmp[2];
tmp[2] = tmp[3];
reader_.read1(tmp, 3);
hdr = MPAHeaderParser.parse(tmp, 0);
}
byte[] buffer = new byte[MPAHeaderParser.mpaPacketSize(hdr)];
System.Buffer.BlockCopy(tmp, 0, buffer, 0, 4);
int size = (int)MPAHeaderParser.mpaPacketSize(hdr) - 4;
reader_.read(buffer, ref size, 4);
if (size < (int)length_ - 4)
{
return ErrorCode.EndOfStream;
}
UInt64 start = 100000 * (UInt64)pos_ * samples_ / info_.getAudioInfo().sampleRate;
UInt64 stop = 100000 * (UInt64)(pos_ + 1) * samples_ / info_.getAudioInfo().sampleRate;
sample = new Sample(buffer, start, stop, seek_, discontinuous_);
discontinuous_ = false;
++pos_;
return ErrorCode.Success;
}
