public unsafe AvioContext(
FfmpegCalls.AvioReadData readDataCallback,
FfmpegCalls.AvioSeek seekCallback,
FfmpegCalls.AvioWriteData writeDataCallback)
{
_readDataCallback = readDataCallback;
_seekCallback = seekCallback;
_writeDataCallback = writeDataCallback;
//make sure that the buffer won't be disposed
//the buffer may change. we always have to free _context->buffer
_buffer = new AvioBuffer {
SuppressAvFree = true
};
_context = FfmpegCalls.AvioAllocContext(_buffer, _writeDataCallback != null, IntPtr.Zero,
_readDataCallback, _writeDataCallback, _seekCallback);
}
internal static unsafe AVIOContext *AvioAllocContext(AvioBuffer buffer, bool writeable, IntPtr userData,
AvioReadData readData, AvioWriteData writeData, AvioSeek seek)
{
byte *bufferPtr = (byte *)buffer.Buffer;
var avioContext = ffmpeg.avio_alloc_context(
bufferPtr,
buffer.BufferSize,
writeable ? 1 : 0,
(void *)userData,
readData, writeData, seek);
if (avioContext == null)
{
throw new FfmpegException("Could not allocate avio-context.", "avio_alloc_context");
}
return(avioContext);
}