| oRTP 5.3.0
    | 
| Data Fields | |
| int | type | 
| int | clock_rate | 
| char | bits_per_sample | 
| char * | zero_pattern | 
| int | pattern_length | 
| int | normal_bitrate | 
| char * | mime_type | 
| int | channels | 
| char * | recv_fmtp | 
| char * | send_fmtp | 
| struct _PayloadTypeAvpfParams | avpf | 
| int | flags | 
| void * | user_data | 
| int _OrtpPayloadType::channels | 
number of channels of audio
| int _OrtpPayloadType::clock_rate | 
rtp clock rate
| char* _OrtpPayloadType::mime_type | 
actually the submime, ex: pcm, pcma, gsm
| int _OrtpPayloadType::type | 
one of PAYLOAD_* macros