Sigma Designs/XVid Update

Reagen Ward and many other people have written in with updates to the Sigma Designs/XVid situation, reported a few days ago. Sigma has replied in email and a press release that they intend to make the source code available, however, they seem to be paying lip service at best to the terms of the GNU Public License. Grant Gross from Newsforge has been pursuing the story and in a story yesterday and another today lays out the current situation.

Comments

NS2k cards and stuff

[renehollan]

I have a Sigma Designs Netstream 2000 card, complete with Linux kernel source drivers. But, the user-space library, while having a reasonably documented API, is available binary only, presumably because of CSS and Macrovision issues.

The kernel drivers appear to be little more than marshelling/unmarshelling stubs to let the user space library communicate with the card. While register-level documentation is available, it isn't developer friendly, as there is no designers' guide that would help a non-hard-core video hardware embedded developer to write their own code: maybe it's just me, but I find the lack of context establishment in the register-only documentation limiting.

People have found Sigma's proprieteray user-space code somewhat buggy, and the present situation makes it difficult for the community to write its own. While I can sympathize with Sigma Designs' predicament following the apparent mistake of a rogue programmer, one way they can "make it up" to the community would be to go beyond the minimal legal GPL requirements and release more source and documentation for their other fine products.

What a crock

[sydlexic]

I'm so tired of hearing the 'evil loner' excuse from companies. Make someone responsible. Fire their asses or have someone resign. Show the world this crap won't be tolerated. Instead what we get is this lame excuse that we're not to blame because of some rogue employee. When employees fail, it's management's responsibility.

Re:Source code

[jonathan_ingram]

Yes, they have made the source code available. However, they nowhere state that it is a derivative work of XviD (although they state that it was 'inspired' by XviD) - they are claiming complete copyright over it.

Why should you care?

It's not a licencing issue - it's a copyright issue. If a have some GPL code, and I own the copyright, then I have the right to relicence the code any way I wish (including giving a company the right to use it in a closed source application - probably for a fee). If I have GPL code which I do *not* own the copyright for, then I have *no* rights to relicence.

This is a similar situation to that facing Mozilla a few months ago - they wanted to relicence the code, but couldn't unless they could contact *every single copyright owner* to get consent (and in Mozilla's case this meant every contributor of a significant patch).

Sigma Designs have taken someone elses code, and claimed copyright over it. This copyright claim (if it were correct) gives them the right to use the stolen code in closed source applications -- and it *is* being used in closed source and hardware applications.

So it doesn't matter that Sigma have opened the source to the stolen code. That's the smaller evil.

Re:Lip service?

[plaa]

Releasing the affected code under the GPL is lip service?
No, it's exactly what is supposed to happen.

They are probably referring to other things than the actual release. They don't give any credit to XVID. From the press release:

"We are pleased to provide the development community with an open source MPEG-4 CODEC, and anticipate that this will accelerate technical improvements and enhance the proliferation of MPEG-4 content," stated Ken Lowe, Sigma Designs' vice president of business development. (emphasis mine)

It makes you think they did all the work. The download page acknowledges that they "had utilized some routines posted by XVID as open source," but the tone is that they did all the hard work. Which isn't what I came to understand when reading the evindence.

Of course, now we have the source, it'll be interesting to make a more detailed study on how much code was copied.

A quick translation

[realgone]

Oh, this is just too much fun. I absolutely have to parse this one:

"Thank you for contacting Sigma Designs and requesting information that relates to our MPEG-4 CODEC and the availability of its source code. We would like to take this opportunity to address the relevant issues that have been raised."

You might be wondering why I'm standing next to your car -- yeah, the one with the smashed window right here -- with a slim-jim in one hand and your stereo in the other. I swear it's not what it looks like.

"...Fulfilling this goal was carried out in two steps. The first was the introduction of an MPEG-4 CODEC, provided free of charge, so that worldwide users could begin encoding new content."

Here's the deal -- I thought it was my car. I've got one just like this.

"The second was the release of source code, so that the development community could continue with technical improvements."

Okay, so maybe I knew it was your car, but I was... um... just borrowing it. I'm all done, see? Here, you can have it back now. No harm, no foul.

"Sigma never intended in making, nor realized, any profits from this code base."

Tell you the truth, I wasn't even planning on keeping your crummy car. We were just gonna use it as the getaway vehicle in this bank job we're doing next week, see?

"Several weeks after the CODEC was first released, Sigma was contacted by the XVID development team regarding the use of certain portions of their code. Upon examination, it was determined that one of our programmers, unbeknownst to management and contrary to Sigma's policy, had utilized some routines posted by XVID as open source."

Wait, wait, ignore everything I just said. It was really some other guy that was trying to steal your car -- this shady looking punk in a leather jacket. You're lucky I got here when I did. I think he ran that way. If you hurry you can still catch him.

"During the past four weeks, Sigma had communicated with XVID to resolve the situation. As a result, Sigma has decided to make the current version of the MPEG-4 CODEC available under the GPL license."

OW! OW! Stop kicking me! Alright, here's your damn stereo back! Jeez!

"Sigma is a supporter of the Linux operating system, appreciates the work being done by the open source community, and continues to issue certain other code under open source arrangements."

But if you don't mind me saying so, sir, you've got great taste in stereo equipment. I got a good luck at that puppy as I was prying her out of the dash and yours is a beaut!

"Though we believe that we have acted as expediently as possible, Sigma Designs sincerely apologizes to the open source community for this inadvertent use of GPL code and for the several weeks it took to resolve the situation."

So we're cool, right? No one needs to call the cops or anything. I'll just grab my stuff and -- look over there! The Pope!

*sound of running footsteps in the other direction*

It's far from being over

[fluor2]

Doom9 is an independent "journalist" that seem to have a very good overview at things in the encoding scene. Here is a sniplet from what he writes:

"First an update on the XviD situation. The release of the Sigma source code does not mean it's all over, it's far from being over. The license agreement which you have to agree to before you can download, and install the codec is not compatible with the GPL. Furthermore, it can now clearly be seen (download the source code and have a look for yourself) that the Sigma codec is pretty much a copy of the XviD codec, but all the copyright notices of the original developers have been removed and replaced. This does not only violate the GPL but copyright laws - you can't just take a program, change a few lines and change the copyright statements, you only have copyright protection for the parts you wrote on your own. And related to this the Sigma codec also contains code taken from the OpenDivX project, the files were outfitted with 2 different copyright notices which is quite funny."

I hope that Sigma will respect GPL licences. I will for sure stop every purchase of Sigma stuff where I work.

Re:XCard Opinion

[Sancho]

Plus I had some self encoded TV episodes using DivX 5, and they had a VBR MP3 audio stream, the XCard plays the audio, and the video is completely out of sync (speeding up, slowing down - as though it is using the VBR timings)... and the player crashes after 5 mins.

While all your other points on the card may or may not be valid (I'm not going to dispute them, in other words), I will take a moment to dispute this one. VBR MP3 audio streams in a DivX file is a complete and utter hack. Anyone who knows about the internals of AVI files will recognize this instantly. That it was made to work and play back correctly in Windows is actually due to a bug in the decoder itself, and should Microsoft ever fix this bug, all VBR MP3 audio interleaved in AVI files will suddenly either lose sync or perform exactly as the XCard.

References:
Can't find it on the new (redesigned) website, but here's the google cache.

http://216.239.53.100/search?q=cache:bqcAKNs_G2cC: www.virtualdub.org/virtualdub_news_old.html+avery+ lee+nandub+hack&hl=en&ie=UTF-8

Re:question;

[Sancho]

I'm more inclined to think that they're doing this because of the huge backlash they got. This story got published all over the place, both before and after Slashdot. They knew they screwed up, and probably they knew that they were in legally questionable waters. In any case, they saw a bunch of people saying, "I'll stop buying from Sigma," and all this combined probably contributed to their current course of action.

My correspondence (so far) with Sigma Designs

[pbryan]

Date: Fri, 23 Aug 2002 16:05:24 -0700
To: kal@sdesigns.com, stephanie.porter@edelman.com, RMP4@sdesigns.com, tech_support@sdesigns.com
Subject: MPEG-4 Video Codec Source Code

To whom it may concern:

Thank you for making the source code to the REALmagic MPEG-4 codec available. As you are now aware, this is a required term of the GNU General Public License (GPL). I have downloaded the source code release (RMP4V1_1.zip) from your website, and have concerns pertaining to the notices that appear at the top of the source files.

In the top of the source files, there is a vague assertion that they are related to the XVID MPEG-4 video codec with the following statement: "This code inspired by the XVID MPEG-4 VIDEO CODEC".

I have performed a side-by-side comparison between the above-mentioned REALmagic MPEG-4 codec and the XVID (xvid_snapshot_20020822.tar.gz) source code, and it is clear to me that the source files you published are not merely "inspired by" the XVID MPEG-4 codec, but are in fact derivative works.

If this is true, then your source distribution appears on its face to be in violation of the GPL. Section 2(a) states: "You must cause the modified files to carry prominent notices stating that you changed the files and the date of any change." I could find no such notices of changes in the source files you released.

I request you remedy this problem by ammending the source code files in accordance with section 2(a), so that this apparent violation can be corrected. Doing so is a legal requirement of the license you accepted by creating a derivative work of the XVID MPEG-4 video codec. Failure to adhere to the terms of the GPL constitutes a copyright infringment by Sigma Designs.

You are clearly using and benefiting from the work of the authors of the XVID MPEG-4 video codec, yet you have hardly credited the development team for making this possible. I strongly urge you to consider to properly acknowledge the XVID development team. Please, give credit where credit is due.

-----

From: Tech Support
Subject:
Date: Fri, 23 Aug 2002 19:59:09 -0700

Interested Parties concerning Sigma's MPEG-4 CODEC

Thank you for contacting Sigma Designs and requesting information that relates to our MPEG-4 CODEC and the availability of its source code. We would like to take this opportunity to address the relevant issues that have been raised.

To begin with, Sigma developed an MPEG-4 CODEC to assist in the proliferation of MPEG-4 content and to ensure that users can create content libraries compatible with the ISO MPEG-4 video specifications and its implementation in silicon. Fulfilling this goal was carried out in two steps. The first was the introduction of an MPEG-4 CODEC, provided free of charge, so that worldwide users could begin encoding new content. The second was the release of source code, so that the development community could continue with technical improvements. Sigma never intended in making, nor realized, any profits from this code base.

Several weeks after the CODEC was first released, Sigma was contacted by the XVID development team regarding the use of certain portions of their code. Upon examination, it was determined that one of our programmers, unbeknownst to management and contrary to Sigma's policy, had utilized some routines posted by XVID as open source. During the past four weeks, Sigma had communicated with XVID to resolve the situation. As a result, Sigma has decided to make the current version of the MPEG-4 CODEC available under the GPL license.

Sigma is a supporter of the Linux operating system, appreciates the work being done by the open source community, and continues to issue certain other code under open source arrangements. Though we believe that we have reacted as expediently as possible, Sigma Designs sincerely apologizes to the open source community for this inadvertent use of GPL code and for the several weeks it took to resolve the situation.

Sincerely,

Ken Lowe
Vice President of Business Development

-----

Date: Fri, 23 Aug 2002 21:42:33 -0700
To: Tech Support
Subject: Re: (no subject)

Dear Mr. Lowe:

Thank you for your prompt response to my message regarding the Sigma Designs REALmagic MPEG-4 video codec. I URGE YOU TO READ THIS MESSAGE CAREFULLY.

In your response, you indicated that Sigma has decided to make the current version of the MPEG-4 video codec available under the GNU General Public License (GPL). This is indeed great news.

You also alluded to the fact that the situation is now resolved. UNFORTUNATELY, THIS IS NOT TRUE.

As I mentioned in my previous message, it appears that Sigma Designs is presently in violation of section 2(a) of the GPL. This section stipulates that any modifications to source code carry a prominant notice stating that you made changes and the date of the change. I can find no such notices in the REALmagic MPEG-4 codec source code.

If true, then SIGMA DESIGNS IS STILL VIOLATING THE COPYRIGHT OF THE AUTHORS OF XVID. I strongly urge you to take action, by either ammending the REALmagic MPEG-4 video codec source code to adhere to section 2(a) of the GPL, or else stop distributing the REALmagic codec altogher. Either action will remedy your current violation of the GPL.

Also, I urge you to give proper credit to the XVID development team in your source code. My comparison of REALmagic and XVID reveals that the Sigma source code is much more than "inspired by the XVID MPEG-4 VIDEO CODEC"; it is clearly derivative of XVID and as such deserves proper acknowledgement to the original authors.

Please, give credit where credit is due.