Sensoray 512 DOS - Manual (Page 20)

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Example:
regs.x.ax = X12_VI_STOP;
regs.x.si = X12_SENDCOMMAND + CARD0; //Select the driver function
int86(X12INT,&regs,&regs); //Call the driver
Note: In addition to the above mentioned parameters, any changes to the X12PARAM members DO0,
DO1, DO2 or DDIR0, DDIR1, DDIR2 take effect when this command is called. Upon return VQSize, DI0,
DI1, DI2, DroppedFrames, and FrameCount are updated.
6.4.3 X12_VI_GETDMADATA
This command gets raw compressed video data from the video DMA buffer (video queue). The data is ES
(elementary stream) MPEG encoded.
Entry:
Parameter Type Value
Buffer far pointer Pointer to a buffer allocated by the user
application for video data.
Length long Number of bytes of MPEG data desired
Exit:
Parameter Type Value
Status short SUCCESS or FAIL. SUCCESS is returned when there
are more than zero bytes of MPEG data available.
Length long Number of bytes of data actually read from the queue
FrameCount unsigned long Number of video frames compressed since the start of
compression.
Example:
BYTE _far Buffer[VIDEO_BUFFER_SIZE];
Param->Buffer = Buffer;
Param->Length = VIDEO_BUFFER_SIZE;
regs.x.ax = X12_VI_GETDMADATA;
regs.x.si = X12_SENDCOMMAND + CARD0; //Select the driver function
int86(X12INT,&regs,&regs); //Call the driver
if(Param->Status == SUCCESS) //if successful, write the data of length Param->Length
{ //to a file
write(fhandle, Buffer, Param->Length);
}
Note: In addition to the above mentioned parameters, any changes to the X12PARAM members DO0,
DO1, DO2 or DDIR0, DDIR1, DDIR2 take effect when this command is called. Upon return VQSize, DI0,
DI1, DI2, DroppedFrames, and FrameCount are updated.