DHCODEC SPACE

Latest Package On DM6437

Tue, 07 Aug 2007 12:21:02 GMT

Now I am preparing a release package for S264 on DM6437
The package will be released at http://sourceforge.net/projects/dm-qcif-codc/

Seeking Cooperation Parnter

Tue, 07 Aug 2007 12:12:42 GMT

One person's effort is very limited. I do long for parnters can take effort together.

On PC side, I am planning to set up a website and sell the codec through e-sale. Now I already start works on the website.

I am very opening for a partner that can in charge of the high level windows application such as MFC, Directshow Filter, Win32 programming.

For the details of it, please contact me at dhcodec@hotmail.com. Welcome your query and advice.

I am here waiting for you.

Re-structure C Code

Tue, 24 Jul 2007 11:52:25 GMT

This time re-structure C Code, inner-loop filter will be added in.

Re-strcture C code again

Mon, 23 Jul 2007 14:39:27 GMT

The performance is not good enough, have to re-structure the C code again.

Current Satuts

Tue, 17 Jul 2007 11:41:24 GMT

Current Satuts:

Inner-loop filer have not added in.

Come to 50fps.

Keep working on optimization.

TI C64X+ Optimization

Sat, 07 Jul 2007 02:50:37 GMT

Current Satuts:

Did some simplify on encoder and re-structure C code.

Re-did some module's assembly code optimization.

Inner-loop filer have not added in.

Now the encoder come to 30fps.

Keep working on optimization, added in inner-loop filter. Hope close to D1 real time encoding.

TI C64X+ DSP optimization

Sat, 16 Jun 2007 00:44:54 GMT

Current Status:

On TI C64x+ DSP at 600MHz, achieved CIF 10fps. But it's not fast enough.

I will do some modification on the code structure, then re-do the optimization.

This time, I will target at CIF 30fps.

Anomaly?

Sun, 22 Apr 2007 11:00:51 GMT

Another Anomaly?

The instructions below cause system error.

The code stay in a loop, system error while the loop was exctued in a few times.

              ABS .L1 A28,A4
          || ABS .L2 B28,B4
         || ADD .S1 A24,1,A24
          || ADD .S2 B24,1,B24

CMPLT .L1 1,A4,A1
|| CMPLT .L2 1,B4,B1

              ADD .D1 A21,A5,A21
          || ADD .D2 B21,B5,B21
          || CMPEQ .L1 0,A28,A0
          || CMPEQ .L2 0,B28,B0

              AND .L1 A0,A1,A1
          || AND .L2 B0,B1,B1

Anomaly?

Sat, 21 Apr 2007 11:23:19 GMT

Guess what will happen here?

XPND2 .M1 A0,A0
|| XPND2 .M2 B0,B0

XPND2 .M1 A1,A1
|| XPND2 .M2 B1,B1

XPND2 .M1 A2,A2
|| XPND2 .M2 B2,B2

Bing.... System will crash....!?

It's absolutly an anomaly.

DirectShow Filter Source Code Available

Sun, 08 Apr 2007 05:15:29 GMT

Thanks Mr Xie.

Mr Xie H.J developped a DirectShow Filter Source Code that can pack DHCODEC static library as DirectShow Filter.

Authorized by Mr Xie H.J, DHCODEC can use the source code as basis.

Welcome email asking for the source code.

Friendly Link

Sun, 08 Apr 2007 05:10:32 GMT

Thanks Mr Wang Q.M's reference linking.

Mr Wang Q.M's blog linking is:

http://blog.csdn.net/quanming1119

Anomaly?

Sun, 01 Apr 2007 12:42:07 GMT

LDBU .D1 *A6[-1],A16
|| LDW .D2 *B6,B16

where "A6==B6"

should written into:

LDBU .D1 *A6[-1],A16

LDW .D2 *B6,B16

Strange oh..?

New Feature Added

Thu, 15 Mar 2007 07:01:38 GMT

Luminance and contrast adjustment.

Original image and modified image comparison as below.

New Feature Added

Wed, 07 Mar 2007 04:32:14 GMT

Optimized Video Rotation Added.

New Feature Added

Wed, 07 Mar 2007 04:26:20 GMT

Optimized Encryption/Decryption for stream data. Security Key Length is 128 bit.

New Feature Added

Sun, 04 Mar 2007 05:11:20 GMT

Optimized edge enhancement is available now.

New Feature Added

Sun, 04 Mar 2007 05:10:02 GMT

Optimized double sampling is available now.

New Feature Added

Sun, 14 Jan 2007 02:46:52 GMT

Compression Rate-Control added.

New Feature Added

Thu, 04 Jan 2007 12:49:06 GMT

New Feature Added:

Motion Detection:

A motion detection module is added. Algorithm is implemented, not optimise yet.

Current module can detect and locate one object. Can be further develop based on user request.

Color Space Conversion:

YUV420/RGB32 Color space conversion is available. Function is optimised.

Error while encounter special features

Fri, 22 Dec 2006 14:26:57 GMT

User feedback:

While decode one baseline stream file which is saved by user, decode exit with error without decode any frame.

Cause:

By go into the syntax of the baseline stream file, the stream contain some features(flag) that decoder does not support.

Fix:

Fix added into package released after 2007-01-01.

While detected un-supported features, decoder will give DEC_NOT_VALID flag.