MediaCodec

Introduction

• MediaCodec is used to access the low-level media codecs.
• Low level media codec include things like encoder and decoder.
• Codec processes input data to provide and generate output data.
• It processes the data asynchronously
• It uses a set of input and output buffers as seen in the diagram above.

How it works

• Client requests for the buffer packets from the codec.
• Then client populates the buffer packets with data and sends the data back to the codec for processing.
• The codec processes the buffer packets one by one and transforms them.
• Finally the client again requests it or receives the transformed buffer packets.
• After receiving the buffer packets from the codec, The client utilizes them and sends the emptied buffer packets back to codec.

More information

• Codec is used to decode a media file and encode it to another one.