Get a subbuffer of size bytes from the given pad data.
Flushes the amount of read bytes.
This function should be called with this STREAM_LOCK held, such as in the callback.
MT safe.
| this |
the collectpads to query |
| data |
the data to use |
| size |
the number of bytes to read |
|
A sub buffer. The size of the buffer can be less that requested. A return of null signals that the pad is end-of-stream. Unref the buffer after use. |