public virtual bool Seek(Timestamp where)
{
// Invalidate stream
_blockLeft = 0;
_curBlock = _blocks.Count;
if (where > _length)
{
return(false);
}
// Search for the block containing the requested sample
int seekSample = AudioStreamHelper.ConvertTimeToStreamPos(where, Rate, IsStereo).TotalNumberOfFrames;
int curSample = 0;
for (_curBlock = 0; _curBlock != _blocks.Count; ++_curBlock)
{
// Skip all none sample blocks for now
if (_blocks[_curBlock].Code != 1 && _blocks[_curBlock].Code != 9)
{
continue;
}
var nextBlockSample = curSample + _blocks[_curBlock].Samples;
if (nextBlockSample > seekSample)
{
break;
}
curSample = nextBlockSample;
}
if (_curBlock == _blocks.Count)
{
return((seekSample - curSample) == 0);
}
else
{
var offset = seekSample - curSample;
_stream.Seek(_blocks[_curBlock].Offset + offset, SeekOrigin.Begin);
_blockLeft = _blocks[_curBlock].Samples - offset;
return(true);
}
}
public SubLoopingAudioStream(ISeekableAudioStream stream, uint loops,
Timestamp loopStart,
Timestamp loopEnd,
bool disposeAfterUse = true)
{
_parent = stream;
_loops = loops;
_pos = new Timestamp(0, Rate * (IsStereo ? 2 : 1));
_loopStart = AudioStreamHelper.ConvertTimeToStreamPos(loopStart, Rate, IsStereo);
_loopEnd = AudioStreamHelper.ConvertTimeToStreamPos(loopEnd, Rate, IsStereo);
_done = false;
Debug.Assert(loopStart < loopEnd);
if (!_parent.Rewind())
{
_done = true;
}
}
public bool Seek(Timestamp wh)
{
_endOfData = true;
if (wh > _playtime)
{
return(false);
}
var seekSample = AudioStreamHelper.ConvertTimeToStreamPos(wh, Rate, IsStereo).TotalNumberOfFrames;
_stream.Seek(seekSample * (_is16Bit ? 2 : 1), SeekOrigin.Begin);
// In case of an error we will not continue stream playback.
if (_stream.Position != _stream.Length)
{
_endOfData = false;
}
return(true);
}
