onReadData

Callback triggered when the SDK reads media resource data.

@CalledByNative int onReadData(ByteBuffer buffer, int bufferSize);

When you call the openWithMediaSource method to open a media resource, the SDK triggers this callback and requests you to provide the buffer for the media resource data.

Parameters

buffer: Data buffer. You need to write bufferSize bytes of data requested by the SDK into this buffer. See ByteBuffer.
bufferSize: Length of the data buffer in bytes.

Return Values

When data is read successfully, returns the actual number of bytes read.
When data read fails, returns 0.