Support progressive forward seeking (without flushing the decoder)

Suppose my current player position is 100ms. Now I want to seek to 150ms. As 150ms is slightly greater than 100ms, we don't need to seek to previous sync frame and come to current seek position. We can just step forward the decoder. I think this will be useful in smooth and fast forward seeking. Is this possible in this player? If it is not possible directly, how can I achieve this? Any thoughts would be appreciated.