From: Anders Blomdell <anders.blomdell@control.lth.se>
To: Thomas Kaiser <v4l@kaiser-linux.li>
Cc: video4linux-list@redhat.com
Subject: Re: Topro 6800 driver
Date: Mon, 09 Mar 2009 19:51:46 +0100 [thread overview]
Message-ID: <49B56542.1090408@control.lth.se> (raw)
In-Reply-To: <49B50E16.8080703@kaiser-linux.li>
Thomas Kaiser wrote:
> Hello Anders
>
> Anders Blomdell wrote:
>>>> Anybody who has a good idea of how to find a DQT/Huffman table that works with
>>>> this image data?
>>> I did some usbsnoops today and see some similar things in the stream as
>>> in your trace. Maybe you can comment on my observation?
>>>
>>> When I stop the capturing, the las 2 Bytes are always 0xff 0xd9 which
>>> look like a valid JPEG marker (End of Image)
>>>
>>> When I search for 0xffd9, I see the following sequence:
>>>
>>> FF D9 5x FF D8 FF FE 14 1E xx xx xx
>> Is the 5x directly following the FFD9 (in my camera, the next frame [55] is in a
>> new ISO frame)?
>
> Actually, the 5x is always the first byte in the IsoPacket. In my
> snoops, it is mostly 5A.
>
>>> - 5x is 55 or 5A
>> I have only seen ISO frames starting with 55 (new frame) AA (abort frame) CC
>> (frame continuation), the 5A case is not documented in the manual I have
>
> Can you send this manual to me (private)?
>
>>> - the 3 xx are mostly the same, but they change a lot when I cover the
>>> lens of the cam. So I think this is some image information (brightness?).
>> Or perhaps JPEG encoded data.
>>
>>> This said, i don't think that FF D8 and FF FE are JPEG markers, just a
>>> unique Byte pattern to mark the start of a new frame.
>> Since the manual states that the chip does JPEG compression, and the frames are
>> significantly smaller than 640*480 and varies in size, I expect it to be in some
>> compressed format, and so far I expect JPEG (but with unknown Huffman/DQT tables).
>>
>>> I guess 5x FF D8 FF FE 14 1E xx xx xx and may be some more bytes is the
>>> frame marker.
>
> I did some more studying over the weekend....
>
> In my snoops, I think:
When I set the RGB/YUV gains to zero, I get:
> 5a ff d8 ff fe 14 1e 00 fd f5 45 7e e8 f8 b8 df 49 57
ff d8 ff fe 28 3c 01 fc ff 00 45 66 9a 69 a2 95 4d 2a 12 d1 00 a2 b4
followed by a big number of repeated (0x152c bytes total):
02 8a 00 a2 80 28 a0 0a 28
and ending with:
02 8a 00 a2 80 ff d9
In binary the repeating sequence can be diveded in half:
0000 0010 1000 1010 0000 0000 1010 0010 1000
0000 0010 1000 1010 0000 0000 1010 0010 1000
Which approximately adds up to 1200 repetitions of this bitpattern 2*(0x152c -
23)/9.
And a 640*480 image divided in 8*8 subframes gives (640*480/(8*8)) 1200
subframes, so now the question is how much info about the Huffman table this
gives us?
When I change the quality setting of the camera, the bitpattern changes, but
size stays approximately the same, here follows the start of the frames at
different quality settings. Notable facts:
1. Byte 6 seems to be currently used quality setting
2. Byte 4 & 5 are exactly twice as big as in Thomas dump, could it be related
to size?
3. Quality settings 0x10 to 0x1f seems to generate the same bit-patter, which
indicates that the file Thomas found might be the DQT, now the quistion is
if my dumps together with those tables are enough to determine the huffman
table used (hopefully the same for all quality settings)
sd_setquality
0 = write(79, 0)
Size=1539, quality=0
ff d8 ff fe 28 3c 00 fc 01 45 73 c1 c1 c3 c1 c3
a7 0b 0a 95 4d 34 a4 92 4a 12 4a c9 24 b4 4b 64
02 8a e8 02 8a 00 a2 80 28 a0 0a 28 02 8a 00 a2
80 28 a0 0a 28 02 8a 00 a2 80 28 a0 0a 28 02 8a
00 a2 80 28 a0 0a 28 02 8a 00 a2 80 28 a0 0a 28
02 8a 00 a2 80 28 a0 0a 28 02 8a 00 a2 80 28 a0
0a 28 02 8a 00 a2 80 28 a0 0a 28 02 8a 00 a2 80
28 a0 0a 28 02 8a 00 a2 80 28 a0 0a 28 02 8a 00
sd_setquality
0 = write(79, 1)
Size=152d, quality=1
ff d8 ff fe 28 3c 01 fc ff 00 45 66 9a 69 a2 95
4d 2a 12 d1 00 a2 b4 02 8a 00 a2 80 28 a0 0a 28
02 8a 00 a2 80 28 a0 0a 28 02 8a 00 a2 80 28 a0
0a 28 02 8a 00 a2 80 28 a0 0a 28 02 8a 00 a2 80
28 a0 0a 28 02 8a 00 a2 80 28 a0 0a 28 02 8a 00
a2 80 28 a0 0a 28 02 8a 00 a2 80 28 a0 0a 28 02
8a 00 a2 80 28 a0 0a 28 02 8a 00 a2 80 28 a0 0a
28 02 8a 00 a2 80 28 a0 0a 28 02 8a 00 a2 80 28
sd_setquality
0 = write(79, 2)
Size=152a, quality=2
ff d8 ff fe 28 3c 02 f9 55 15 29 a5 52 95 34 a8
48 05 15 40 51 40 14 50 05 14 01 45 00 51 40 14
50 05 14 01 45 00 51 40 14 50 05 14 01 45 00 51
40 14 50 05 14 01 45 00 51 40 14 50 05 14 01 45
00 51 40 14 50 05 14 01 45 00 51 40 14 50 05 14
01 45 00 51 40 14 50 05 14 01 45 00 51 40 14 50
05 14 01 45 00 51 40 14 50 05 14 01 45 00 51 40
14 50 05 14 01 45 00 51 40 14 50 05 14 01 45 00
sd_setquality
0 = write(79, 3)
Size=1526, quality=3
ff d8 ff fe 28 3c 03 f9 fd 15 12 49 42 01 45 50
14 50 05 14 01 45 00 51 40 14 50 05 14 01 45 00
51 40 14 50 05 14 01 45 00 51 40 14 50 05 14 01
45 00 51 40 14 50 05 14 01 45 00 51 40 14 50 05
14 01 45 00 51 40 14 50 05 14 01 45 00 51 40 14
50 05 14 01 45 00 51 40 14 50 05 14 01 45 00 51
40 14 50 05 14 01 45 00 51 40 14 50 05 14 01 45
00 51 40 14 50 05 14 01 45 00 51 40 14 50 05 14
sd_setquality
0 = write(79, 4)
Size=1526, quality=4
ff d8 ff fe 28 3c 04 f9 fd 15 12 49 42 01 45 50
14 50 05 14 01 45 00 51 40 14 50 05 14 01 45 00
51 40 14 50 05 14 01 45 00 51 40 14 50 05 14 01
45 00 51 40 14 50 05 14 01 45 00 51 40 14 50 05
14 01 45 00 51 40 14 50 05 14 01 45 00 51 40 14
50 05 14 01 45 00 51 40 14 50 05 14 01 45 00 51
40 14 50 05 14 01 45 00 51 40 14 50 05 14 01 45
00 51 40 14 50 05 14 01 45 00 51 40 14 50 05 14
sd_setquality
0 = write(79, 5)
Size=1526, quality=5
ff d8 ff fe 28 3c 05 f9 fd 15 12 49 42 01 45 50
14 50 05 14 01 45 00 51 40 14 50 05 14 01 45 00
51 40 14 50 05 14 01 45 00 51 40 14 50 05 14 01
45 00 51 40 14 50 05 14 01 45 00 51 40 14 50 05
14 01 45 00 51 40 14 50 05 14 01 45 00 51 40 14
50 05 14 01 45 00 51 40 14 50 05 14 01 45 00 51
40 14 50 05 14 01 45 00 51 40 14 50 05 14 01 45
00 51 40 14 50 05 14 01 45 00 51 40 14 50 05 14
sd_setquality
0 = write(79, 6)
Size=1526, quality=6
ff d8 ff fe 28 3c 06 f1 94 54 49 25 08 05 15 40
51 40 14 50 05 14 01 45 00 51 40 14 50 05 14 01
45 00 51 40 14 50 05 14 01 45 00 51 40 14 50 05
14 01 45 00 51 40 14 50 05 14 01 45 00 51 40 14
50 05 14 01 45 00 51 40 14 50 05 14 01 45 00 51
40 14 50 05 14 01 45 00 51 40 14 50 05 14 01 45
00 51 40 14 50 05 14 01 45 00 51 40 14 50 05 14
01 45 00 51 40 14 50 05 14 01 45 00 51 40 14 50
sd_setquality
0 = write(79, 7)
Size=1525, quality=7
ff d8 ff fe 28 3c 07 f1 94 54 4a 2c 80 51 54 05
14 01 45 00 51 40 14 50 05 14 01 45 00 51 40 14
50 05 14 01 45 00 51 40 14 50 05 14 01 45 00 51
40 14 50 05 14 01 45 00 51 40 14 50 05 14 01 45
00 51 40 14 50 05 14 01 45 00 51 40 14 50 05 14
01 45 00 51 40 14 50 05 14 01 45 00 51 40 14 50
05 14 01 45 00 51 40 14 50 05 14 01 45 00 51 40
14 50 05 14 01 45 00 51 40 14 50 05 14 01 45 00
sd_setquality
0 = write(79, 8)
Size=1524, quality=8
ff d8 ff fe 28 3c 08 f2 94 54 d0 05 15 40 51 40
14 50 05 14 01 45 00 51 40 14 50 05 14 01 45 00
51 40 14 50 05 14 01 45 00 51 40 14 50 05 14 01
45 00 51 40 14 50 05 14 01 45 00 51 40 14 50 05
14 01 45 00 51 40 14 50 05 14 01 45 00 51 40 14
50 05 14 01 45 00 51 40 14 50 05 14 01 45 00 51
40 14 50 05 14 01 45 00 51 40 14 50 05 14 01 45
00 51 40 14 50 05 14 01 45 00 51 40 14 50 05 14
sd_setquality
0 = write(79, 9)
Size=1523, quality=9
ff d8 ff fe 28 3c 09 f2 94 54 01 45 50 14 50 05
14 01 45 00 51 40 14 50 05 14 01 45 00 51 40 14
50 05 14 01 45 00 51 40 14 50 05 14 01 45 00 51
40 14 50 05 14 01 45 00 51 40 14 50 05 14 01 45
00 51 40 14 50 05 14 01 45 00 51 40 14 50 05 14
01 45 00 51 40 14 50 05 14 01 45 00 51 40 14 50
05 14 01 45 00 51 40 14 50 05 14 01 45 00 51 40
14 50 05 14 01 45 00 51 40 14 50 05 14 01 45 00
sd_setquality
0 = write(79, a)
Size=1523, quality=a
ff d8 ff fe 28 3c 0a f3 54 54 01 45 50 14 50 05
14 01 45 00 51 40 14 50 05 14 01 45 00 51 40 14
50 05 14 01 45 00 51 40 14 50 05 14 01 45 00 51
40 14 50 05 14 01 45 00 51 40 14 50 05 14 01 45
00 51 40 14 50 05 14 01 45 00 51 40 14 50 05 14
01 45 00 51 40 14 50 05 14 01 45 00 51 40 14 50
05 14 01 45 00 51 40 14 50 05 14 01 45 00 51 40
14 50 05 14 01 45 00 51 40 14 50 05 14 01 45 00
sd_setquality
0 = write(79, b)
Size=1523, quality=b
ff d8 ff fe 28 3c 0b f3 54 54 01 45 50 14 50 05
14 01 45 00 51 40 14 50 05 14 01 45 00 51 40 14
50 05 14 01 45 00 51 40 14 50 05 14 01 45 00 51
40 14 50 05 14 01 45 00 51 40 14 50 05 14 01 45
00 51 40 14 50 05 14 01 45 00 51 40 14 50 05 14
01 45 00 51 40 14 50 05 14 01 45 00 51 40 14 50
05 14 01 45 00 51 40 14 50 05 14 01 45 00 51 40
14 50 05 14 01 45 00 51 40 14 50 05 14 01 45 00
sd_setquality
0 = write(79, c)
Size=1523, quality=c
ff d8 ff fe 28 3c 0c f3 f4 50 05 14 01 45 00 51
40 14 50 05 14 01 45 00 51 40 14 50 05 14 01 45
00 51 40 14 50 05 14 01 45 00 51 40 14 50 05 14
01 45 00 51 40 14 50 05 14 01 45 00 51 40 14 50
05 14 01 45 00 51 40 14 50 05 14 01 45 00 51 40
14 50 05 14 01 45 00 51 40 14 50 05 14 01 45 00
51 40 14 50 05 14 01 45 00 51 40 14 50 05 14 01
45 00 51 40 14 50 05 14 01 45 00 51 40 14 50 05
sd_setquality
0 = write(79, d)
Size=1523, quality=d
ff d8 ff fe 28 3c 0d f3 f4 50 05 14 01 45 00 51
40 14 50 05 14 01 45 00 51 40 14 50 05 14 01 45
00 51 40 14 50 05 14 01 45 00 51 40 14 50 05 14
01 45 00 51 40 14 50 05 14 01 45 00 51 40 14 50
05 14 01 45 00 51 40 14 50 05 14 01 45 00 51 40
14 50 05 14 01 45 00 51 40 14 50 05 14 01 45 00
51 40 14 50 05 14 01 45 00 51 40 14 50 05 14 01
45 00 51 40 14 50 05 14 01 45 00 51 40 14 50 05
sd_setquality
0 = write(79, e)
Size=1522, quality=e
ff d8 ff fe 28 3c 0e e2 d1 40 14 50 05 14 01 45
00 51 40 14 50 05 14 01 45 00 51 40 14 50 05 14
01 45 00 51 40 14 50 05 14 01 45 00 51 40 14 50
05 14 01 45 00 51 40 14 50 05 14 01 45 00 51 40
14 50 05 14 01 45 00 51 40 14 50 05 14 01 45 00
51 40 14 50 05 14 01 45 00 51 40 14 50 05 14 01
45 00 51 40 14 50 05 14 01 45 00 51 40 14 50 05
14 01 45 00 51 40 14 50 05 14 01 45 00 51 40 14
sd_setquality
0 = write(79, f)
Size=1522, quality=f
ff d8 ff fe 28 3c 0f e2 d1 40 14 50 05 14 01 45
00 51 40 14 50 05 14 01 45 00 51 40 14 50 05 14
01 45 00 51 40 14 50 05 14 01 45 00 51 40 14 50
05 14 01 45 00 51 40 14 50 05 14 01 45 00 51 40
14 50 05 14 01 45 00 51 40 14 50 05 14 01 45 00
51 40 14 50 05 14 01 45 00 51 40 14 50 05 14 01
45 00 51 40 14 50 05 14 01 45 00 51 40 14 50 05
14 01 45 00 51 40 14 50 05 14 01 45 00 51 40 14
sd_setquality
0 = write(79, 10)
Size=1557, quality=10
ff d8 ff fe 28 3c 10 fc 01 45 73 c1 c1 c2 f0 f8
58 58 18 18 58 78 18 18 18 74 60 e0 e0 e0 d1 4e
1e 16 0e 16 1d 2a 8c 3c 2c 2c 3a 15 34 61 e1 e1
d1 4d 34 51 45 14 aa 68 a5 2a 69 49 24 80 51 5d
00 51 40 14 50 05 14 01 45 00 51 40 14 50 05 14
01 45 00 51 40 14 50 05 14 01 45 00 51 40 14 50
05 14 01 45 00 51 40 14 50 05 14 01 45 00 51 40
14 50 05 14 01 45 00 51 40 14 50 05 14 01 45 00
sd_setquality
0 = write(79, 11)
Size=1557, quality=11
ff d8 ff fe 28 3c 11 fc 01 45 73 c1 c1 c2 f0 f8
58 58 18 18 58 78 18 18 18 74 60 e0 e0 e0 d1 4e
1e 16 0e 16 1d 2a 8c 3c 2c 2c 3a 15 34 61 e1 e1
d1 4d 34 51 45 14 aa 68 a5 2a 69 49 24 80 51 5d
00 51 40 14 50 05 14 01 45 00 51 40 14 50 05 14
01 45 00 51 40 14 50 05 14 01 45 00 51 40 14 50
05 14 01 45 00 51 40 14 50 05 14 01 45 00 51 40
14 50 05 14 01 45 00 51 40 14 50 05 14 01 45 00
sd_setquality
0 = write(79, 12)
Size=1557, quality=12
ff d8 ff fe 28 3c 12 fc 01 45 73 c1 c1 c2 f0 f8
58 58 18 18 58 78 18 18 18 74 60 e0 e0 e0 d1 4e
1e 16 0e 16 1d 2a 8c 3c 2c 2c 3a 15 34 61 e1 e1
d1 4d 34 51 45 14 aa 68 a5 2a 69 49 24 80 51 5d
00 51 40 14 50 05 14 01 45 00 51 40 14 50 05 14
01 45 00 51 40 14 50 05 14 01 45 00 51 40 14 50
05 14 01 45 00 51 40 14 50 05 14 01 45 00 51 40
14 50 05 14 01 45 00 51 40 14 50 05 14 01 45 00
sd_setquality
0 = write(79, 13)
Size=1557, quality=13
ff d8 ff fe 28 3c 13 fc 01 45 73 c1 c1 c2 f0 f8
58 58 18 18 58 78 18 18 18 74 60 e0 e0 e0 d1 4e
1e 16 0e 16 1d 2a 8c 3c 2c 2c 3a 15 34 61 e1 e1
d1 4d 34 51 45 14 aa 68 a5 2a 69 49 24 80 51 5d
00 51 40 14 50 05 14 01 45 00 51 40 14 50 05 14
01 45 00 51 40 14 50 05 14 01 45 00 51 40 14 50
05 14 01 45 00 51 40 14 50 05 14 01 45 00 51 40
14 50 05 14 01 45 00 51 40 14 50 05 14 01 45 00
sd_setquality
0 = write(79, 14)
Size=1557, quality=14
ff d8 ff fe 28 3c 14 fc 01 45 73 c1 c1 c2 f0 f8
58 58 18 18 58 78 18 18 18 74 60 e0 e0 e0 d1 4e
1e 16 0e 16 1d 2a 8c 3c 2c 2c 3a 15 34 61 e1 e1
d1 4d 34 51 45 14 aa 68 a5 2a 69 49 24 80 51 5d
00 51 40 14 50 05 14 01 45 00 51 40 14 50 05 14
01 45 00 51 40 14 50 05 14 01 45 00 51 40 14 50
05 14 01 45 00 51 40 14 50 05 14 01 45 00 51 40
14 50 05 14 01 45 00 51 40 14 50 05 14 01 45 00
sd_setquality
0 = write(79, 15)
Size=1557, quality=15
ff d8 ff fe 28 3c 15 fc 01 45 73 c1 c1 c2 f0 f8
58 58 18 18 58 78 18 18 18 74 60 e0 e0 e0 d1 4e
1e 16 0e 16 1d 2a 8c 3c 2c 2c 3a 15 34 61 e1 e1
d1 4d 34 51 45 14 aa 68 a5 2a 69 49 24 80 51 5d
00 51 40 14 50 05 14 01 45 00 51 40 14 50 05 14
01 45 00 51 40 14 50 05 14 01 45 00 51 40 14 50
05 14 01 45 00 51 40 14 50 05 14 01 45 00 51 40
14 50 05 14 01 45 00 51 40 14 50 05 14 01 45 00
sd_setquality
0 = write(79, 16)
Size=1557, quality=16
ff d8 ff fe 28 3c 16 fc 01 45 73 c1 c1 c2 f0 f8
58 58 18 18 58 78 18 18 18 74 60 e0 e0 e0 d1 4e
1e 16 0e 16 1d 2a 8c 3c 2c 2c 3a 15 34 61 e1 e1
d1 4d 34 51 45 14 aa 68 a5 2a 69 49 24 80 51 5d
00 51 40 14 50 05 14 01 45 00 51 40 14 50 05 14
01 45 00 51 40 14 50 05 14 01 45 00 51 40 14 50
05 14 01 45 00 51 40 14 50 05 14 01 45 00 51 40
14 50 05 14 01 45 00 51 40 14 50 05 14 01 45 00
sd_setquality
0 = write(79, 17)
Size=1557, quality=17
ff d8 ff fe 28 3c 17 fc 01 45 73 c1 c1 c2 f0 f8
58 58 18 18 58 78 18 18 18 74 60 e0 e0 e0 d1 4e
1e 16 0e 16 1d 2a 8c 3c 2c 2c 3a 15 34 61 e1 e1
d1 4d 34 51 45 14 aa 68 a5 2a 69 49 24 80 51 5d
00 51 40 14 50 05 14 01 45 00 51 40 14 50 05 14
01 45 00 51 40 14 50 05 14 01 45 00 51 40 14 50
05 14 01 45 00 51 40 14 50 05 14 01 45 00 51 40
14 50 05 14 01 45 00 51 40 14 50 05 14 01 45 00
sd_setquality
0 = write(79, 18)
Size=1557, quality=18
ff d8 ff fe 28 3c 18 fc 01 45 73 c1 c1 c2 f0 f8
58 58 18 18 58 78 18 18 18 74 60 e0 e0 e0 d1 4e
1e 16 0e 16 1d 2a 8c 3c 2c 2c 3a 15 34 61 e1 e1
d1 4d 34 51 45 14 aa 68 a5 2a 69 49 24 80 51 5d
00 51 40 14 50 05 14 01 45 00 51 40 14 50 05 14
01 45 00 51 40 14 50 05 14 01 45 00 51 40 14 50
05 14 01 45 00 51 40 14 50 05 14 01 45 00 51 40
14 50 05 14 01 45 00 51 40 14 50 05 14 01 45 00
sd_setquality
0 = write(79, 19)
Size=1557, quality=19
ff d8 ff fe 28 3c 19 fc 01 45 73 c1 c1 c2 f0 f8
58 58 18 18 58 78 18 18 18 74 60 e0 e0 e0 d1 4e
1e 16 0e 16 1d 2a 8c 3c 2c 2c 3a 15 34 61 e1 e1
d1 4d 34 51 45 14 aa 68 a5 2a 69 49 24 80 51 5d
00 51 40 14 50 05 14 01 45 00 51 40 14 50 05 14
01 45 00 51 40 14 50 05 14 01 45 00 51 40 14 50
05 14 01 45 00 51 40 14 50 05 14 01 45 00 51 40
14 50 05 14 01 45 00 51 40 14 50 05 14 01 45 00
sd_setquality
0 = write(79, 1a)
Size=1557, quality=1a
ff d8 ff fe 28 3c 1a fc 01 45 73 c1 c1 c2 f0 f8
58 58 18 18 58 78 18 18 18 74 60 e0 e0 e0 d1 4e
1e 16 0e 16 1d 2a 8c 3c 2c 2c 3a 15 34 61 e1 e1
d1 4d 34 51 45 14 aa 68 a5 2a 69 49 24 80 51 5d
00 51 40 14 50 05 14 01 45 00 51 40 14 50 05 14
01 45 00 51 40 14 50 05 14 01 45 00 51 40 14 50
05 14 01 45 00 51 40 14 50 05 14 01 45 00 51 40
14 50 05 14 01 45 00 51 40 14 50 05 14 01 45 00
sd_setquality
0 = write(79, 1b)
Size=1557, quality=1b
ff d8 ff fe 28 3c 1b fc 01 45 73 c1 c1 c2 f0 f8
58 58 18 18 58 78 18 18 18 74 60 e0 e0 e0 d1 4e
1e 16 0e 16 1d 2a 8c 3c 2c 2c 3a 15 34 61 e1 e1
d1 4d 34 51 45 14 aa 68 a5 2a 69 49 24 80 51 5d
00 51 40 14 50 05 14 01 45 00 51 40 14 50 05 14
01 45 00 51 40 14 50 05 14 01 45 00 51 40 14 50
05 14 01 45 00 51 40 14 50 05 14 01 45 00 51 40
14 50 05 14 01 45 00 51 40 14 50 05 14 01 45 00
sd_setquality
0 = write(79, 1c)
Size=1557, quality=1c
ff d8 ff fe 28 3c 1c fc 01 45 73 c1 c1 c2 f0 f8
58 58 18 18 58 78 18 18 18 74 60 e0 e0 e0 d1 4e
1e 16 0e 16 1d 2a 8c 3c 2c 2c 3a 15 34 61 e1 e1
d1 4d 34 51 45 14 aa 68 a5 2a 69 49 24 80 51 5d
00 51 40 14 50 05 14 01 45 00 51 40 14 50 05 14
01 45 00 51 40 14 50 05 14 01 45 00 51 40 14 50
05 14 01 45 00 51 40 14 50 05 14 01 45 00 51 40
14 50 05 14 01 45 00 51 40 14 50 05 14 01 45 00
sd_setquality
0 = write(79, 1d)
Size=1557, quality=1d
ff d8 ff fe 28 3c 1d fc 01 45 73 c1 c1 c2 f0 f8
58 58 18 18 58 78 18 18 18 74 60 e0 e0 e0 d1 4e
1e 16 0e 16 1d 2a 8c 3c 2c 2c 3a 15 34 61 e1 e1
d1 4d 34 51 45 14 aa 68 a5 2a 69 49 24 80 51 5d
00 51 40 14 50 05 14 01 45 00 51 40 14 50 05 14
01 45 00 51 40 14 50 05 14 01 45 00 51 40 14 50
05 14 01 45 00 51 40 14 50 05 14 01 45 00 51 40
14 50 05 14 01 45 00 51 40 14 50 05 14 01 45 00
sd_setquality
0 = write(79, 1e)
Size=1557, quality=1e
ff d8 ff fe 28 3c 1e fc 01 45 73 c1 c1 c2 f0 f8
58 58 18 18 58 78 18 18 18 74 60 e0 e0 e0 d1 4e
1e 16 0e 16 1d 2a 8c 3c 2c 2c 3a 15 34 61 e1 e1
d1 4d 34 51 45 14 aa 68 a5 2a 69 49 24 80 51 5d
00 51 40 14 50 05 14 01 45 00 51 40 14 50 05 14
01 45 00 51 40 14 50 05 14 01 45 00 51 40 14 50
05 14 01 45 00 51 40 14 50 05 14 01 45 00 51 40
14 50 05 14 01 45 00 51 40 14 50 05 14 01 45 00
sd_setquality
0 = write(79, 1f)
Size=1557, quality=1f
ff d8 ff fe 28 3c 1f fc 01 45 73 c1 c1 c2 f0 f8
58 58 18 18 58 78 18 18 18 74 60 e0 e0 e0 d1 4e
1e 16 0e 16 1d 2a 8c 3c 2c 2c 3a 15 34 61 e1 e1
d1 4d 34 51 45 14 aa 68 a5 2a 69 49 24 80 51 5d
00 51 40 14 50 05 14 01 45 00 51 40 14 50 05 14
01 45 00 51 40 14 50 05 14 01 45 00 51 40 14 50
05 14 01 45 00 51 40 14 50 05 14 01 45 00 51 40
14 50 05 14 01 45 00 51 40 14 50 05 14 01 45 00
>
> is the frame header, so at offset 18, the JPEG streams starts.
> And I am 100% sure that the stream is JPEG coded.
>
>>> Comments?
>> It would be interesting to know if somebody well versed in windows programming
>> could write a program to get JPEG frames out of the driver directly (provided
>> this is possible of course), if the image part of such a frame matches the data
>> seen on USB, we would then have the Huffman/DQT tables.
>
> Might be possible for some one you knows how to interact with the Windoz
> driver, I don't.
> Or you can get the sensor in saturation (only white picture), then you
> know how the picture should look like. When the whole picture is only
> white, each MCU has to be the same ;-)
>
>> At the moment I'm stuck, since I see no way to find out what Huffman/DQT tables
>> that are used.
>
> I found some interesting file in a TP6810 folder on my Windoz box after
> I installed the driver. See Attachment ;-)
>
> Hope this helps, I will study some more....
>
> Thomas
>
>
--
Anders Blomdell Email: anders.blomdell@control.lth.se
Department of Automatic Control
Lund University Phone: +46 46 222 4625
P.O. Box 118 Fax: +46 46 138118
SE-221 00 Lund, Sweden
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next prev parent reply other threads:[~2009-03-09 18:52 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-27 22:15 Topro 6800 driver Anders Blomdell
2009-02-28 10:31 ` Jean-Francois Moine
2009-02-28 15:11 ` Anders Blomdell
2009-02-28 15:54 ` Thomas Kaiser
2009-03-01 7:26 ` Jean-Francois Moine
2009-03-01 16:33 ` Thomas Champagne
2009-03-02 13:20 ` Jean-Francois Moine
2009-03-02 16:58 ` Anders Blomdell
2009-02-28 11:54 ` Thomas Kaiser
[not found] ` <49B194A7.4030808@kaiser-linux.li>
2009-03-09 12:10 ` Anders Blomdell
[not found] ` <49B50E16.8080703@kaiser-linux.li>
2009-03-09 14:06 ` Anders Blomdell
2009-03-09 18:51 ` Anders Blomdell [this message]
2009-03-09 20:10 ` Thomas Kaiser
2009-03-09 20:29 ` Anders Blomdell
2009-03-09 20:43 ` Thomas Kaiser
[not found] ` <49B62023.2090206@control.lth.se>
[not found] ` <49B65BA7.6070700@kaiser-linux.li>
[not found] ` <49B68F34.60802@control.lth.se>
[not found] ` <49B6A495.9060204@kaiser-linux.li>
2009-03-11 15:09 ` Anders Blomdell
2009-03-11 19:11 ` Thomas Kaiser
2009-03-17 20:13 ` Topro 6800 driver [JPEG decoding solved] Thomas Kaiser
2009-03-18 20:10 ` Thomas Kaiser
2009-03-18 21:42 ` Thomas Champagne
2009-03-25 17:10 ` Anders Blomdell
[not found] ` <49B5786D.4060102@kaiser-linux.li>
[not found] ` <49B57CB6.8000402@control.lth.se>
2009-03-09 20:38 ` Mail list, Is WIKI up to date? Thomas Kaiser
-- strict thread matches above, loose matches on Subject: below --
2009-03-27 18:06 topro 6800 driver Andy Shevchenko
[not found] ` <49CD2868.9080502@kaiser-linux.li>
[not found] ` <5ec8ebd50903311144h316c7e3bmd30ce2c3d5a268ee@mail.gmail.com>
[not found] ` <49D4EAB2.4090206@control.lth.se>
2009-04-03 20:07 ` Anders Blomdell
2009-04-03 20:54 ` Erik Andrén
2009-04-04 11:29 ` Anders Blomdell
2009-04-05 17:36 ` Jean-Francois Moine
2009-04-20 15:37 ` Thomas Champagne
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