Encoding using ARM Cortex-M IAR compiler

[Marcelo V]

Hello All,

I just ported linwebp to encode raw grayscale8 but the result is no good.

Same input with same config encodes very well on Mac and Linux.

I guess something related to compiler or platform I am using.

Anyone have/had similar problem?

Config:
lossless = 0
quality = 80.000000
method = 4
image_hint = 0
target_size = 0
target_PSNR = 0.000000
segments = 4
sns_strength = 50
filter_strength = 60
filter_sharpness = 0
filter_type = 1
autofilter = 0
alpha_compression = 1
alpha_filtering = 1
alpha_quality = 100
pass = 1
show_compressed = 0
preprocessing = 0
partitions = 0
partition_limit = 0
emulate_jpeg_size = 0
thread_level = 0
low_memory = 0
near_lossless = 100
exact = 0
use_delta_palette = 0
use_sharp_yuv = 0

Original and macosx Images are attached.

[James Zern]

Hi,

On Mon, Oct 19, 2020 at 3:18 PM Marcelo V <vam...@gmail.com> wrote:

Hello All,

I just ported linwebp to encode raw grayscale8 but the result is no good.

Same input with same config encodes very well on Mac and Linux.

I guess something related to compiler or platform I am using.

Anyone have/had similar problem?

Would you mind filing a bug for this at https://bugs.chromium.org/p/webp/issues/entry? It would be helpful to include the libwebp version (or git describe) and some details about the compiler and configure/cmake command line used. It's not out the question there's a compiler bug, we have run into some in the past.

 

--
You received this message because you are subscribed to the Google Groups "WebP Discussion" group.
To unsubscribe from this group and stop receiving emails from it, send an email to webp-discuss...@webmproject.org.
To view this discussion on the web visit https://groups.google.com/a/webmproject.org/d/msgid/webp-discuss/4ce5cd64-eca0-4a2b-ac46-ee715abca714n%40webmproject.org.

[Marcelo V]

I am in a rush to conclude the dev of an embedded camera product and may not have time to prepare what would be required for this investigation. I would need to create a IAR project with the all image and lib files to run on ARM simulator using NXP SKD.

I will do so later as I really want to also support WebP format.

Thanks,

MV

[Marcelo V]

I actually had some time this morning...

Here is the report:

https://bugs.chromium.org/p/webp/issues/detail?id=486

It has a test project that runs on IAR ARM emulator. IAR provides 30 days demo for its Workbench.

Regards,

Marcelo

[James Zern]

Hi,

On Wed, Oct 21, 2020 at 8:03 AM Marcelo V <vam...@gmail.com> wrote:

I actually had some time this morning...

Here is the report:

https://bugs.chromium.org/p/webp/issues/detail?id=486

It has a test project that runs on IAR ARM emulator. IAR provides 30 days demo for its Workbench.

Thanks for filing the bug, we can move the discussion there.