Datasheet

1252
SAM9M10 [DATASHEET]
6355F–ATARM–12-Mar-13
46.10.7 Decoder Control Register 3 (Stream Buffer Information)
Name: VDEC_CTLR3
Address: 0x00900018
Access: Read-write
• STREAM_LEN: Stream Length
Amount of stream data bytes in input buffer. If the given buffer size is not enough for finishing the picture the corresponding
interrupt is given and new stream buffer base address and stream buffer size information should be given.
For VC-1 the buffer must include data for one picture/slice of the picture.
For H264/MPEG4/H263/MPEG2/MPEG1 the buffer must include at least data for one slice/VP of the picture.
For JPEG the buffer size must be a multiple of 256 bytes or the amount of data for one picture.
• INIT_QP: Quantization Initialization
Initial value for quantization parameter (picture quantizer).
• ST_COD_EN: Stream Start Code
Stream start codes exist:
0: Stream doesn't contain start codes.
1: Stream contains start codes.
31 30 29 28 27 26 25 24
ST_COD_EN INIT_QP –
23 22 21 20 19 18 17 16
STREAM_LEN
15 14 13 12 11 10 9 8
STREAM_LEN
76543210
STREAM_LEN