Create a new Buffer that can hold an RTP packet that is exactly
packet_len long.
The length of the payload depends on pad_len and csrc_count and can be calculated with
calc_payload_len. All RTP header fields will be set to 0/FALSE.
| packet_len |
the total length of the packet |
| pad_len |
the amount of padding |
| csrc_count |
the number of CSRC entries |
|
A newly allocated buffer that can hold an RTP packet of |