Sensoray 2251 Rev.A - Manual (Page 34)

function will check for start codes. It is recommended, therefore to separate the data. For
instance, if you want to store a 32 bit (4 byte) latitude position in the stream, you could put the
high order bytes in the first 2 bytes of user data, followed by a “marker byte” of 0xff, and put the
other 2 bytes in the next 2 user data bytes.
Eg. For a latitude with hex value 0x70000111, the user data would be
data[0] = 0x70, data[1] = 0x00, data[2]=0xff(marker), data[3]=0x11, data[4]=0x11
Similarly, if other user data needs inserted, simply add a market byte to separate the data into
sections.
Parameters
int insize
input size of the embedded data.
const void *data
pointer to user data
board
Board number in system.
Returns
0 if success, negative if error.
MID2250_API int SN_GetPlaybackFrame(
long inSize,
unsigned char *pFrame,
BITMAPINFOHEADER *pBMI,
int type,
int block,
int timeout,
int vidnum
);
SN_GetPlaybackFrame retrieves current frame being decoded after SN_PlaybackVideo. It can
retrieve Uncompressed frames and MPEG data from the playback. The pBMI returned contains the
image parameter. It is up to the user to determine a reasonable image size for pFrame
beforehand. For example, if the user needs RGB24, they should allocate at least 720x480x3 for
NTSC and 768x576*3 for PAL. For compressed data, the video output comes out of the demux in
very small packets. Therefor, this function does not work the same as SN_GetFrame where the
images are packetized by MPEG picture headers, but returns all of the MPEG data received since
the last call.
Parameters
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