public bool Write(byte[] buffer, int count)
{
try
{
lock (lockVAR)
{
if (count > FreeBytes)
{
// Need a smart grow options
GrowBuffer(totalSize + (count - FreeBytes));
}
// the data will always fit. Just need to write it to the right blocks
int todoCount = count;
int bufferOffset = 0;
// Step 1 fill current block
int block = Position2BlockNumber(writePtr);
int offset = Position2BlockNumberOffset(writePtr);
int writeCount = BLOCKSIZE - offset;
if (writeCount > todoCount)
{
writeCount = todoCount;
}
Buffer.BlockCopy(buffer, bufferOffset, blockList[block], offset, writeCount);
todoCount -= writeCount;
bufferOffset += writeCount;
while (todoCount > 0)
{
block = NextBlockNumber(block);
writeCount = BLOCKSIZE;
if (writeCount > todoCount)
{
writeCount = todoCount;
}
Buffer.BlockCopy(buffer, bufferOffset, blockList[block], 0, writeCount);
todoCount -= writeCount;
bufferOffset += writeCount;
} // while
// Adjust writePtr
writePtr += count;
if (writePtr >= totalSize)
{
writePtr = writePtr - totalSize;
}
usedBytes += count;
} //lock
}
catch (Exception e)
{
LibRTMPLogger.Log(LibRTMPLogLevel.Error, string.Format("[CDR.LibRTMP.Media.CircularBlockBuffer.Write]: {0}", e.ToString()));
}
return(true);
}
/// <summary>
/// Writes counts bytes from internal circular buffer to buffer
/// return number of bytes write to the buffer in case
/// requested count could not be fulfilled
/// </summary>
public int Read(byte[] buffer, int count)
{
int doneCount = 0;
try
{
lock (lockVAR)
{
if (count > usedBytes)
{
count = Convert.ToInt32(usedBytes);
}
// the data will always fit. Just need to write it to the right blocks
int todoCount = count;
int bufferOffset = 0;
// Step 1 fill current block
int block = Position2BlockNumber(readPtr);
int offset = Position2BlockNumberOffset(readPtr);
int readCount = BLOCKSIZE - offset;
if (readCount > todoCount)
{
readCount = todoCount;
}
Buffer.BlockCopy(blockList[block], offset, buffer, bufferOffset, readCount);
todoCount -= readCount;
bufferOffset += readCount;
doneCount += readCount;
while (todoCount > 0)
{
block = NextBlockNumber(block);
readCount = BLOCKSIZE;
if (readCount > todoCount)
{
readCount = todoCount;
}
Buffer.BlockCopy(blockList[block], 0, buffer, bufferOffset, readCount);
todoCount -= readCount;
bufferOffset += readCount;
doneCount += readCount;
} // while
// Adjust readPtr
readPtr += count;
if (readPtr >= this.totalSize)
{
readPtr = readPtr - this.totalSize;
}
// adjust size
this.usedBytes -= count;
} //lock
}
catch (Exception e)
{
LibRTMPLogger.Log(LibRTMPLogLevel.Error, string.Format("[CDR.LibRTMP.Media.CircularBlockBuffer.Read]: {0}", e.ToString()));
}
return(doneCount);
}
