sm2288_parameters.txt

神龙卡开发原代码

<<<<<<< sm2288_parameter_map
All parameters are mapped to HIU regs 16-107 with the HIU reg 108 
as control regs.  From host, every register is viewed as 2 
consective byte. e.g. HIU_reg_16:byte0 and byte 1.

Byte    :HIU reg:  bit	:	definition/description

===1 ENCODER
---1.1 Audio
0	: 0x01	:  7-4	:Audio encoding format
				0: MPEG-1 Layer-1
				1: MPEG-1 Layer-2
				2: MPEG-1 Layer-3
				3: AC3 2-channel
				7: LPCM
				others: reserved
		:  3-0	:MP3 encoding input selection
				0: AIU
				1: HIU
				others: reserved
1	: 0x00	:  7-0	:Bitrate(see detailed table-1)
2	: 0x03	:  7-4	:Sampling rate
				0: 44.1Khz
				1: 48  KHz
				2: 32  Khz
				others: reserved
		:  3-0	:PCM resolution
				0: 16 bit
				1: 18 bit
				2: 20 bit
				3: 24 bit
				others: reserved
3	: 0x02	:  7-6	:Stereo Mode
			 For AC3
				0: single channel
				1: 2 channel
				others: reserved
			 For MPEG audio
				0: stereo
				1: joint stereo(intensity or ms)
				2: dual channel
				3: single channel
		:  5-4	:stereo mode extension.only for MPEG-1 Layer-3
				0: subband 4-31 in intensity_st, bound 4
				1: subband 8-31 in intensity_st, bound 8
				2: subband 12-31 in intensity_st, bound 12
				3: subband 16-31 in intensity_st, bound 16
		:  3-0	:reserved
4:	: 0x05	:  7-0	:Advanced setting
			 for MPEG(see MPEG spec for detailed explanation)
				bit 7: CRC protesion, default 1
				bit 6: reserved
				bit 5: Copyright, default 1
				bit 4: original or copy, default 1
				bit 3: emphsis, default 0
				others: reserved
			 for AC3(see AC3 for detailed explanation)
				bit 7-6: Audio coding mode, default 2
				bit 5-2: reserved
				bit 1: Dual_mono,default 0
				bit 0: Auto gain control,default 0
5	: 0x04	:  7-2	:reserved
		:  1-0  :Copy one channel to two channels
				0: stereo
				1: copy left channel to left/right channels
				2: copy right channel to left/right channels
				3: reserved
6-7	: 0x07-0x06	:reserved

---1.2 Video
8	: 0x09	:  7-5	:video format, 1 - PAL, 2 - NTSC(default).
		   4	:top field first, 0 - false, 1 - true(default)
		   3	:video input data format, 
				0 - ITU656(default) 
			  	1 - ITU601
		   2	:video A/D select, 
				0 - Philips SAA7111 type(default)
			   	1 - Harris HMP8115 type
			 this bit resolves the odd/even field detection 
			 difference between the two types of chips
		   1	:digital loop back enable, 
				0 - disable 
			   	1 - enable(default)
		   0	:input channel select, 
				0 - regular input 
			       	1 - input from OSD(advanced encoding mode)
9	: 0x08	:  7-4	:preprocessing filter lever, 0 - 7, default 1
		   3	:horizantal filter/decimation select, 
			 0 - filter(default), 1 - decimation
		   2	: VBV Buffer threshold
				1 - lower threshold 35kbytes, upper threshold 55kbytes
				0 - lower threshold 25kbytes, upper threshold 40kbytes
	         1  : 0 - default non-intra matrix
                    1 - pre-defined non-intra matrix
               0  : MPEG-2 format encoding for SIF/QSIF images
10	: 0x0b	:  7-5	:reserved
		   4-0	:first field offset, default 0 
11	: 0x0a	:  7-5	:reserved
		   4-0	:second field offset, default 0
12	: 0x0d	:  7-6	:Y/C offset, default 0
		   5-0	:horozontal line offset, default 0
13	: 0x0c	:  7	:scaling control(only work when resolution option is 6)
			 0 - viu scaling(default), 1 - vpu scaling
		   6  :fixed quant mode is set for rate control block(rcb).
               5	:Enable scene detection and GOP structure change                   
               4: Insert close caption data in GOP user data fields
                  format of user data---
                   2 followed by number of bytes to sent in 12 bits then user datas.
                   example- to sent 60 bytes as user data 
                          203c..datas..
               3: set vpu to scale for 2/3D1,1/2D1,SIF,QSIF and 640 resolutions
		   2-0	:resolution
				0: full D1(horizontal 704)
				1: 2/3 D1 
				2: 1/2 D1
				3: SIF
				4: QSIF
				5: full D1(horizontal 720)
				6: 640
				others:reserved
14	: 0x0f	:  7-3	:GOP length N, default 15
		   2	:closed GOP for N=15 and M=3, 
			 1: IPBBPBBPBBPBBPP for every GOP
			 0: open GOP
		   1-0	:I-P distance M, default 3	
15	: 0x0e	:  7-0	:reserved
16-17	: 0x11, 0x10	:video bitrate bit
			 bitrate 15-0	0:reserved
					x : x KBPS
					default 4000(4Mbps) - 0x0fa0
				typical values:
				  1150(1.15 Mbps) - 0x047e
				  2400(2.40 Mbps) - 0x0960
				  6000(6.00 Mbps) - 0x1770
				  8000(8.00 Mbps) - 0x1f40
				 10000(10.0 Mbps) - 0x27c0
				 12000(12.0 Mbps) - 0x2ee0
				 15000(15.0 Mbps) - 0x3a98
18	: 0x13	:  7-1	:reserved
		   0	:VBR/CBR control, 0 - CBR(default), 1 - VBR
19	: 0x12	:  7-6	:P picture motion search range,
				3: 64 pels(default)
				2: 32 pels
				1: 16 pels
				0: 8 pels
		   5-4	:B1 picture motion search range,
				2: 32 pels(default)
				1: 16 pels
				0: 8 pels
		   3-2	:B2 picture motion search range,
				2: 32 pels(default)
				1: 16 pels
				0: 8 pels
		   1-0	:reserved
20	: 0x15	:  7-6	:reserved
		   5-4	:intra DC precision, 
				0: 8 bit(default)
				1: 9 bit
				2: 10 bit
				3: 11 bit
		   3	:frame pred fram DCT, 0 - false(default), 1 - true
		   2	:Q scale type, 0 - linear(default), 1 - nonlinear
		   1	:intra VLC format, default 0
		   0	:alternate scan, 0 - zigzag(default), 1 - slanted
21	: 0x14	  	:reserved
22	: 0x17		:reserved
23	: 0x16		:reserved
24	: 0x19	:  7-0	:temporal filtering FD threshold (0-255)
25	: 0x18	:  7-6	:temp_ftr_yuv_selection
			 0 - uv_follow_y (default)
			 1 - v_follow_u
			 2 - yuv_separate
			 3 - y_only
		   5	:temp_ftr_ctl, 0 - off(default), 1 - on
		   4-0	:reserved
26	: 0x1b		:reserved
27	: 0x1a		:reserved

---1.3 Mux
28	: 0x1d	:  7-0	:mux format
				0: SVCD
				1: VCD
				2: DVD
				3: CDDA
				4: video ES
				5: audio ES
				6: Transport stream
				7: 2K custom
				8:customized
				others: reserved
29	: 0x1c	:  7	:sector header information generation enable,0
				8-byte
		   6-5  :audio video select
				0: video and audio (default)
				1: video only program stream
				2: audio only program stream
		   4    :navigation msg for DVD and 2K style mux
				0: no nav msg (default)
				1: on
		   3	: enable debug message
				0: disable
				1: enable
		   2-0	:reserved
30	: 0x1f	:
		if Transport stream
			program number.(0 will set program number to 8) 
		else
			don't care.
31	: 0x1e	:	7-5: reserved
				5: Adjust TimeStamp when pause and resume the encoding.
				   (This bit currently used in NEW MUX only)
                        4: enable the insertion of Navigation pack before 
                           every GOP(or VOBU)which includes dummy PCI & 
                           DSI packet. (Note: This feature must be enabled 
                           for DVD style mux only)
                        3-1: Specify the Number of video frames to delay 
                             before start muxing audio
                        0 : enable the audio delay
32-35	: 0x20-0x23	:reserved for customized MUX parameters

36-39	: 0x24-0x27	:initial SCR
40-43	: 0x28-0x2b	:initial PTS

---1.4 System
44	: 0x2d	:  7-0	:system format
				0: SVCD
				1: VCD
				others: reserved
45	: 0x2c	:  7	:sector header information generation enable,0
		   6-4	:reserved
		   3	:empty sector generation enable,1
		   2-0	:reserved
46-47	: 0x2f, 0x2e	:DMA_size
				the real hiu_DMA_ size is DMA_size*8.
				hiu_DMA_size is 256 if DMA_size is less than 32
				hiu_DMA_size is 31k if DMA_size is lager than 0x7fff

48	: 0x31	:  7-1	:reserved	
		   0	:200usec interval between HIU DMAs
				1: enabled
				0: disabled (default)
49	: 0x30	:  7-0  :GPIO[7:0] input/output control
			 For each bit,
				0: input (default)
				1: output
50	: 0x33	:  7-0	:GPIO[7:0] output value (only if they are output enable)
			 For each bit,
				0: output 0
				1: output 1
51	: 0x32	:  7-0   : reserved


---1.5 OSD
52	: 0x35	:7-4	:reserved  
		3	:Status Flag
			1: Status Enabled at Config 
			0: Status Disabled at Config
	   	2	:Logo Flag
			1: Logo Enabled at Config
			0: Logo Disabled at Config
	   	1	:Menu Flag
			1: Menu Enabled at Config
			0: Menu Disabled at Config
		0	:OSD Flag
		 	1: OSD Enable
		 	0: OSD disable   
	(refer to osd_interface.doc for details) 

53	: 0x34	:  7-0	:reserved
54	: 0x37	:  7-0	:reserved
55	: 0x36	:  7-0 	:reserved

==DECODER
56-91	: 		:to be defined


>>>>>>>>>>>>>table-1
		|		MPEG-1				|
-----------------------------------------------------------------
Byte 1 value	|	Layer-1	|	Layer-2	|	Layer-3	|		 
0		|free format	|free format	|free format	|
1		|32kbps		|32kbps		|32kbps		|
2		|64kbps		|48kbps		|40kbps		|
3		|96kbps		|56kbps		|48kbps		|
4		|128kbps	|64kbps		|56kbps		|
5		|160kbps	|80kbps		|64kbps		|
6		|192kbps	|96kbps		|80kbps		|
7		|224kbps	|112kbps	|96kbps		|
8		|256kbps	|128kbps	|112kbps	|	
9		|288kbps	|160kbps	|128kbps	|
10		|320kbps	|192kbps	|160kbps	|
11		|352kbps	|224kbps	|192kbps	|
12		|384kbps	|256kbps	|224kbps	|
13		|416kbps	|320kbps	|256kbps	|
14		|448kbps	|384kbps	|320kbps	|
0thers		| ***reserved***

Byte 1 value	|	AC3			 
0,1		|32 kbps
2,3		|40 kbps
4,5		|48 kbps
6,7		|56 kbps
8,9		|64 kbps
10,11		|80 kbps
12,13		|96 kbps
14,15		|112 kbps
16,17		|128 kbps
18,19		|160 kbps
20,21		|192 kbps
22,23		|224 kbps
24,25		|256 kbps
26,27		|320 kbps
28,29		|384 kbps
30,31		|448 kbps
32,33		|512 kbps
34,35		|576 kbps
36,37		|640 kbps
Notice that there is no difference between byte-1 value bbbbb1(B) 
and bbbbb0(B) unless sampling rate is 44.1KHz. AC3 encoder try 
to encode with the defined bitrate as uplimit when last bit is 
'1', otherwise it try to encode exactly at the defined bitrate.