On 23/07/2024 11:49, Sebastian Fricke wrote:
> Hey Benjamin,
>
> On 22.07.2024 17:05, Benjamin Gaignard wrote:
>> Since V4L2_FMT_FLAG_ENUM_ALL flag mostly targeting stateless
>
> s/Since/Since the/
> s/targeting/targets/
>
>> decoder pixel formats enumeration, update vicodec visl test
>
> s/pixel formats/pixel-format/
>
>> drivers to use it.
>
> s/drivers/driver/
>
> The rest below basically just strips the flag from every use-case of the
> index, before using it.
>
> I wonder couldn't we implement a macro for this, as I believe this will
> have to be done in a lot of places, something like:
>
> /*
> * Drivers can support an enumeration of all formats, by ORing the
> * V4L2_FMT_FLAG_ENUM_ALL flag into the index field.
> * In order to use the index field, strip the flag first.
> *
> * See vidioc-enum-fmt.rst documentation for more details.
> */
> #define STRIP_ENUM_ALL_FLAG(index) \
> index & ~V4L2_FMT_FLAG_ENUM_ALL
>
> And then use it like this:
>
> u32 index = STRIP_ENUM_ALL_FLAG(f->index);
There is really no advantage to that. It is much better to be explicit
about it rather than hiding it in a define.
Regards,
Hans
>
> If we define this in a common header, then every driver can easily
> utilize it and you have built-in documentation.
>
> What do you think?
>
> Regards,
> Sebastian
>
>>
>> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@xxxxxxxxxxxxx>
>> ---
>> drivers/media/test-drivers/vicodec/vicodec-core.c | 7 ++++---
>> drivers/media/test-drivers/visl/visl-video.c | 11 +++++++----
>> 2 files changed, 11 insertions(+), 7 deletions(-)
>>
>> diff --git a/drivers/media/test-drivers/vicodec/vicodec-core.c b/drivers/media/test-drivers/vicodec/vicodec-core.c
>> index 3e011fe62ae1..1b4cd8ddd7c2 100644
>> --- a/drivers/media/test-drivers/vicodec/vicodec-core.c
>> +++ b/drivers/media/test-drivers/vicodec/vicodec-core.c
>> @@ -706,6 +706,7 @@ static int enum_fmt(struct v4l2_fmtdesc *f, struct vicodec_ctx *ctx,
>> bool is_out)
>> {
>> bool is_uncomp = (ctx->is_enc && is_out) || (!ctx->is_enc && !is_out);
>> + u32 index = f->index & ~V4L2_FMT_FLAG_ENUM_ALL;
>>
>> if (V4L2_TYPE_IS_MULTIPLANAR(f->type) && !multiplanar)
>> return -EINVAL;
>> @@ -718,18 +719,18 @@ static int enum_fmt(struct v4l2_fmtdesc *f, struct vicodec_ctx *ctx,
>>
>> if (ctx->is_enc ||
>> !vb2_is_streaming(&ctx->fh.m2m_ctx->cap_q_ctx.q))
>> - info = v4l2_fwht_get_pixfmt(f->index);
>> + info = v4l2_fwht_get_pixfmt(index);
>> else
>> info = v4l2_fwht_find_nth_fmt(info->width_div,
>> info->height_div,
>> info->components_num,
>> info->pixenc,
>> - f->index);
>> + index);
>> if (!info)
>> return -EINVAL;
>> f->pixelformat = info->id;
>> } else {
>> - if (f->index)
>> + if (index)
>> return -EINVAL;
>> f->pixelformat = ctx->is_stateless ?
>> V4L2_PIX_FMT_FWHT_STATELESS : V4L2_PIX_FMT_FWHT;
>> diff --git a/drivers/media/test-drivers/visl/visl-video.c b/drivers/media/test-drivers/visl/visl-video.c
>> index f8d970319764..c5f3e13b4198 100644
>> --- a/drivers/media/test-drivers/visl/visl-video.c
>> +++ b/drivers/media/test-drivers/visl/visl-video.c
>> @@ -341,21 +341,24 @@ static int visl_enum_fmt_vid_cap(struct file *file, void *priv,
>> struct v4l2_fmtdesc *f)
>> {
>> struct visl_ctx *ctx = visl_file_to_ctx(file);
>> + u32 index = f->index & ~V4L2_FMT_FLAG_ENUM_ALL;
>>
>> - if (f->index >= ctx->coded_format_desc->num_decoded_fmts)
>> + if (index >= ctx->coded_format_desc->num_decoded_fmts)
>> return -EINVAL;
>>
>> - f->pixelformat = ctx->coded_format_desc->decoded_fmts[f->index];
>> + f->pixelformat = ctx->coded_format_desc->decoded_fmts[index];
>> return 0;
>> }
>>
>> static int visl_enum_fmt_vid_out(struct file *file, void *priv,
>> struct v4l2_fmtdesc *f)
>> {
>> - if (f->index >= ARRAY_SIZE(visl_coded_fmts))
>> + u32 index = f->index & ~V4L2_FMT_FLAG_ENUM_ALL;
>> +
>> + if (index >= ARRAY_SIZE(visl_coded_fmts))
>> return -EINVAL;
>>
>> - f->pixelformat = visl_coded_fmts[f->index].pixelformat;
>> + f->pixelformat = visl_coded_fmts[index].pixelformat;
>> return 0;
>> }
>>
>> --
>> 2.43.0
>>
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>
