Sensoray 2250 Linux Ver2.0.X - Manual (Page 14)

0 on success, negative value if error
int SN_Polling(
int board)
);
Sets the SDK to return immediately on calls to SN_GetAudioData and
SN_GetOneFrame.
Parameters
board
board number in the system (use 0 for single board setups).
Returns
0 on success, negative value if error
int SN_Blocking(
int board)
);
Sets the SDK to return block(up to one second) on calls to SN_GetAudioData and
SN_GetOneFrame.
Parameters
board
board number in the system (use 0 for single board setups).
Returns
0 on success, negative value if error
int SN_SetSeqMode(
int board,
int seqmode)
);
Advanced use only. Sensoray is not responsible for invalid combinations of sequence
mode and gop size(see SN_SetGopSize). SN_SetSeqMode will try to determine if the
setting is valid and return -EINVAL if the sequence is invalid. The following are allowed
settings of sequence mode and gop size.
1) If you change seq_mode = 2, you must set GOP_SIZE to be from 2-15
2) If you change seq_mode = 3, you must set GOP_SIZE to a multiple of 3 up to 15
for MPEG1/MPEG2, and up to 30 for MPEG4_DIVX.
3) If you change seq_mode =1(IFrames only), you should leave GOP_SIZE
unchanged. Alternatively, IFrame only mode can be set through
SN_SetBasicChipSettings.
1