int size = stream_Peek(s, &header, 256);
int position = 0;
- if (find_jpeg_marker(&position, header, size) != 0xd8)
+ if (find_jpeg_marker(&position, header, size) != 0xd8 || position > size-2)
return false;
if (find_jpeg_marker(&position, header, position + 2) != 0xe0)
return false;
/* Skip this jpeg header */
uint32_t header_size = GetWBE(&header[position]);
position += header_size;
- if (position + 4 > size)
+
+ /* Get enough data to analyse the next header */
+ if (position + 6 > size)
{
- size = position + 4;
+ size = position + 6;
if( stream_Peek (s, &header, size) < size )
return false;
}
- /* Skip the comment header */
if ( !(header[position] == 0xFF && header[position+1] == 0xFE) )
return false;
-
position += 2;
header_size = GetWBE (&header[position]);
- /* Find the MXF header */
+ /* Check if this is a MXF header. We may have a jpeg comment first */
+ if (!memcmp (&header[position+2], "MXF\0", 4) )
+ return true;
+
+ /* Skip the jpeg comment and find the MXF header after that */
size = position + header_size + 8; //8 = FF FE 00 00 M X F 00
- if (stream_Peek(s, &header, position + header_size + 8 ) < size)
+ if (stream_Peek(s, &header, size ) < size)
return false;
position += header_size;