[Spice-devel] Patch to support LZ4 compression algorithm‏‏

[Fabio Fantoni]

Il 07/01/2015 09:22, Javier Celaya ha scritto:
> Hello
>
> To enable LZ4 from the qemu command line, you have to add this to ui/spice-
> core.c:
>
>  static const char *compression_names[] = {
>      [ SPICE_IMAGE_COMPRESS_OFF ]      = "off",
>      [ SPICE_IMAGE_COMPRESS_AUTO_GLZ ] = "auto_glz",
>      [ SPICE_IMAGE_COMPRESS_AUTO_LZ ]  = "auto_lz",
>      [ SPICE_IMAGE_COMPRESS_QUIC ]     = "quic",
>      [ SPICE_IMAGE_COMPRESS_GLZ ]      = "glz",
>      [ SPICE_IMAGE_COMPRESS_LZ ]       = "lz",
> +    [ SPICE_IMAGE_COMPRESS_LZ4 ]      = "lz4",
>  };

Can you send a patch to qemu-devel at nongnu.org to add it in qemu 2.3 (now
in development) please?

>
> Build qemu, and then you can use --spice image-compression=lz4.
>
> About the problem with SPICE_BITMAP_FLAGS_TOP_DOWN, I'll have a look at it 
> ASAP.
>
> Thanks for your feedback.
>
> El Miércoles, 7 de enero de 2015 15:48:43 LgDoor escribió:
>> i'm not sure but it seems lz4 won't be enabled unless adding a new value of
>> the image_compress parameter in QEMU. 
>> so i just replace lz with lz4, at red_compress_image() in red_worker.c, 
> 6680:
>>> if (image_compression == SPICE_IMAGE_COMPRESS_LZ4 &&
>>>    red_channel_client_test_remote_cap(&dcc->common.base,
>>>    SPICE_DISPLAY_CAP_LZ4_COMPRESSION)) {
>> changes to 
>>
>>> if (true && .......
>> and launch qemu with --spice image-compression=auto_lz.
>>
>> ----------------------------------------
>>
>>> Date: Wed, 7 Jan 2015 08:15:07 +0100
>>> From: fantonifabio at tiscali.it
>>> To: lgdoor at outlook.com; spice-devel at lists.freedesktop.org
>>> Subject: Re: [Spice-devel] Patch to support LZ4 compression algorithm‏‏
>>>
>>> Il 07/01/2015 08:01, LgDoor ha scritto:
>>>> has anybody tried this feature and encountered the displaying problems?
>>>>
>>>> I just made a small change to enable lz4, but the image turns out to be
>>>> broken (see the screenshots). And I observed that it goes wrong only for
>>>> the SpiceBitmap w/o SPICE_BITMAP_FLAGS_TOP_DOWN flag in the
>>>> red_compress_image() function from red_worker.c .> 
>>> What change you did?
>>> I tried it only using both server and client compiled with it and FWIK
>>> should be used automatically if no image compression specified.
>>>
>>>> 2014-11-14 0:11 GMT+08:00 Javier Celaya <javier.celaya at flexvm.es>:
>>>>> Hello
>>>>>
>>>>> There they go.
>>>>>
>>>>> However, don't forget that, since spice-protocol is a submodule of
>>>>> spice-
>>>>> common, once you push the commit for spice-protocol, the commit for
>>>>> spice-
>>>>> common should point to it. The same with spice and spice-gtk in relation
>>>>> to
>>>>> spice-common.
>>>>>
>>>>> Regards
>>>>>
>>>>> El Jueves, 13 de noviembre de 2014 16:04:00 Christophe Fergeau escribió:
>>>>>> Hey,
>>>>>>
>>>>>> On Fri, Nov 07, 2014 at 10:17:11AM +0100, Javier Celaya wrote:
>>>>>>> Hello
>>>>>>>
>>>>>>> I resend the patch for the spice repository. I just realized I forgot
>>>>>>> to
>>>>>>> remove a debug message from red_worker.c, sorry.
>>>>>> Thanks for the updated patches, they look good to me. There are 2 blank
>>>>>> lines at the end of lz4_encoder.[ch] which should be removed.
>>>>>> Can you resend these patches generated with git-format-patch so that
>>>>>> they contain a commit log, and an author name/address? Then they can be
>>>>>> pushed upstream.
>>>>>>
>>>>>> Christophe
>>>>> _______________________________________________
>>>>> Spice-devel mailing list
>>>>> Spice-devel at lists.freedesktop.org
>>>>> http://lists.freedesktop.org/mailman/listinfo/spice-devel
>>


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