PUBLIC JPEG_RET_E ParseHead(JPEG_DEC_INPUT_PARA_T *jpeg_dec_input)
{
uint32 c = 0;
/* Expect an SOI marker first */
while(1)/*lint !e716*/
{
if ((!GetNextMarker(&c)) || (c == M_EOI) )
{
JPEG_TRACE("[JPEG_HWParseHead] find the SOI marker error: %x", c);
return JPEG_FAILED;
}
if(c == M_SOI)
{
break;
}
}
/* Process markers until SOF */
c = ProcessTables(jpeg_dec_input);
switch (c)
{
case M_ERROR:
return JPEG_FAILED;
case M_SOS:
if(GetSOS() != JPEG_SUCCESS)
{
return JPEG_FAILED;
}
break;
case M_EOI:
return JPEG_FAILED;
default:
return JPEG_FAILED;
}
return JPEG_SUCCESS;
}
bool ieJpegDecoder::ParseScanHeader()
// Read the start of a scan (everything through the SOS marker).
// Return true if find SOS, false if find EOI.
{
// Process markers until SOS or EOI
int c = ParseTables();
if (c == M_ERROR) return false;
switch (c) {
case M_SOS:
return GetSOS();
case M_EOI:
iScanNumber = 0;
return true;
default:
return false;
}
}
