Sensoray 512 DOS Manual do Utilizador descarregar pdf (Página 21)

6.4.4 X12_VI_PUTDMADATA

This command puts ES (elementary stream) MPEG encoded video data into the video DMA buffer (video

queue).

Entry:

Parameter Type Value

Buffer far pointer Pointer to a buffer allocated by the user

application holding video data.

Length long Number of bytes of MPEG data to be decompressed

Exit:

Parameter Type Value

Status short SUCCESS or FAIL. FAIL is returned if data was not

Written.

Length long Number of bytes of MPEG data actually written.

Example:

BYTE _far Buffer[VIDEO_BUFFER_SIZE];

Param->Mode = DECODE;

regs.x.ax = X12_VI_START;

regs.x.si = X12_SENDCOMMAND + CARD0; //Select the driver function

int86(X12INT,&regs,&regs); //Call the driver

Param->Length = read(fhan,Buffer, VIDEO_BUFFER_SIZE);

while(!kbhit())

{

Param->Buffer = Buffer;

regs.x.ax = X12_VI_PUTDMADATA;

regs.x.si = X12_SENDCOMMAND + CARD0; //Select the "Send command' driver function

int86(X12INT,&regs,&regs); //Call the driver

if(Param->Status == SUCCESS)

if((Param->Length = read(fhan,Buffer, Param->Length)) == EOF)

break;

}

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.

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