[libcamera-devel] [PATCH v4 05/12] libcamera: controls: Generate an array of valid values

[Laurent Pinchart]

Hi Jacopo,

On Sat, Oct 24, 2020 at 01:05:49AM +0300, Laurent Pinchart wrote:
> On Fri, Oct 23, 2020 at 07:11:09PM +0200, Jacopo Mondi wrote:
> > For each Control that support enumerated values generate a vector
> 
> s/support/supports/
> s/a vector/an array/
> 
> > of ControlValues which contains the full list of values.
> > 
> > At the expense of a slight increase in memory occupation this change
> > allows the construction of the ControlInfo associated with a Control
> > from the values list, defaulting the minimum and maximum values
> > reported by the ControlInfo.
> > 
> > Reviewed-by: Kieran Bingham <kieran.bingham at ideasonboard.com>
> > Signed-off-by: Jacopo Mondi <jacopo at jmondi.org>
> 
> Reviewed-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>

I've just noticed that checkstyle.py reports a few warnings. Could you
address them ? 

> If anyone is looking for a newbies task, converting the controls and
> properties templates to jinja is a good candidate, I think it will
> simplify the scripts and make them easier to maintain.
> 
> > ---
> >  include/libcamera/control_ids.h.in |  1 +
> >  src/libcamera/control_ids.cpp.in   |  1 +
> >  utils/gen-controls.py              | 30 ++++++++++++++++++++++++++++++
> >  3 files changed, 32 insertions(+)
> > 
> > diff --git a/include/libcamera/control_ids.h.in b/include/libcamera/control_ids.h.in
> > index baadca83b103..7edeb6b65e32 100644
> > --- a/include/libcamera/control_ids.h.in
> > +++ b/include/libcamera/control_ids.h.in
> > @@ -10,6 +10,7 @@
> >  #ifndef __LIBCAMERA_CONTROL_IDS_H__
> >  #define __LIBCAMERA_CONTROL_IDS_H__
> >  
> > +#include <array>
> >  #include <stdint.h>
> >  
> >  #include <libcamera/controls.h>
> > diff --git a/src/libcamera/control_ids.cpp.in b/src/libcamera/control_ids.cpp.in
> > index 056645cfbdfb..5fb1c2c30558 100644
> > --- a/src/libcamera/control_ids.cpp.in
> > +++ b/src/libcamera/control_ids.cpp.in
> > @@ -8,6 +8,7 @@
> >   */
> >  
> >  #include <libcamera/control_ids.h>
> > +#include <libcamera/controls.h>
> >  
> >  /**
> >   * \file control_ids.h
> > diff --git a/utils/gen-controls.py b/utils/gen-controls.py
> > index bf681503f86a..a0bd43fabc31 100755
> > --- a/utils/gen-controls.py
> > +++ b/utils/gen-controls.py
> > @@ -33,6 +33,12 @@ ${description}''')
> >  ${description}
> >   */''')
> >      def_template = string.Template('extern const Control<${type}> ${name}(${id_name}, "${name}");')
> > +    enum_values_doc = string.Template('''/**
> > + * \\var ${name}Values
> > + * \\brief List of all $name supported values
> > + */''')
> > +    enum_values_start = string.Template('''extern const std::array<const ControlValue, ${size}> ${name}Values = {''')
> > +    enum_values_values = string.Template('''\tstatic_cast<int32_t>(${name}),''')
> >  
> >      ctrls_doc = []
> >      ctrls_def = []
> > @@ -68,6 +74,7 @@ ${description}
> >              enum_doc = []
> >              enum_doc.append(enum_doc_start_template.substitute(info))
> >  
> > +            num_entries = 0;
> >              for entry in enum:
> >                  value_info = {
> >                      'name' : name,
> > @@ -75,11 +82,25 @@ ${description}
> >                      'description': format_description(entry['description']),
> >                  }
> >                  enum_doc.append(enum_doc_value_template.substitute(value_info))
> > +                num_entries += 1
> >  
> >              enum_doc = '\n *\n'.join(enum_doc)
> >              enum_doc += '\n */'
> >              target_doc.append(enum_doc)
> >  
> > +            values_info = {
> > +                'name' : info['name'],
> > +                'size' : num_entries,
> > +            }
> > +            target_doc.append(enum_values_doc.substitute(values_info))
> > +            target_def.append(enum_values_start.substitute(values_info))
> > +            for entry in enum:
> > +                value_info = {
> > +                    'name' : entry['name']
> > +                }
> > +                target_def.append(enum_values_values.substitute(value_info))
> > +            target_def.append("};")
> > +
> >          target_doc.append(doc_template.substitute(info))
> >          target_def.append(def_template.substitute(info))
> >  
> > @@ -100,6 +121,7 @@ ${description}
> >  def generate_h(controls):
> >      enum_template_start = string.Template('''enum ${name}Enum {''')
> >      enum_value_template = string.Template('''\t${name} = ${value},''')
> > +    enum_values_template = string.Template('''extern const std::array<const ControlValue, ${size}> ${name}Values;''')
> >      template = string.Template('''extern const Control<${type}> ${name};''')
> >  
> >      ctrls = []
> > @@ -132,14 +154,22 @@ def generate_h(controls):
> >          if enum:
> >              target_ctrls.append(enum_template_start.substitute(info))
> >  
> > +            num_entries = 0
> >              for entry in enum:
> >                  value_info = {
> >                      'name': entry['name'],
> >                      'value': entry['value'],
> >                  }
> >                  target_ctrls.append(enum_value_template.substitute(value_info))
> > +                num_entries += 1
> >              target_ctrls.append("};")
> >  
> > +            values_info = {
> > +                'name' : info['name'],
> > +                'size' : num_entries,
> > +            }
> > +            target_ctrls.append(enum_values_template.substitute(values_info))
> > +
> >          target_ctrls.append(template.substitute(info))
> >          id_value += 1
> >  

-- 
Regards,

Laurent Pinchart