pv/binding/decoder.cpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2013 Joel Holdsworth <joel@airwebreathe.org.uk>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  19  */
  20
  21 #include <libsigrokdecode/libsigrokdecode.h>
  22
  23 #include "decoder.hpp"
  24
  25 #include <boost/none_t.hpp>
  26
  27 #include <pv/data/decoderstack.hpp>
  28 #include <pv/data/decode/decoder.hpp>
  29 #include <pv/prop/double.hpp>
  30 #include <pv/prop/enum.hpp>
  31 #include <pv/prop/int.hpp>
  32 #include <pv/prop/string.hpp>
  33
  34 using boost::none;
  35 using std::make_pair;
  36 using std::map;
  37 using std::pair;
  38 using std::shared_ptr;
  39 using std::string;
  40 using std::vector;
  41
  42 using pv::prop::Double;
  43 using pv::prop::Enum;
  44 using pv::prop::Int;
  45 using pv::prop::Property;
  46 using pv::prop::String;
  47
  48 namespace pv {
  49 namespace binding {
  50
  51 Decoder::Decoder(
  52         shared_ptr<pv::data::DecoderStack> decoder_stack,
  53         shared_ptr<data::decode::Decoder> decoder) :
  54         decoder_stack_(decoder_stack),
  55         decoder_(decoder)
  56 {
  57         assert(decoder_);
  58
  59         const srd_decoder *const dec = decoder_->decoder();
  60         assert(dec);
  61
  62         for (GSList *l = dec->options; l; l = l->next) {
  63                 const srd_decoder_option *const opt =
  64                         (srd_decoder_option*)l->data;
  65
  66                 const QString name = QString::fromUtf8(opt->desc);
  67
  68                 const Property::Getter get = [&, opt]() {
  69                         return getter(opt->id); };
  70                 const Property::Setter set = [&, opt](Glib::VariantBase value) {
  71                         setter(opt->id, value); };
  72
  73                 shared_ptr<Property> prop;
  74
  75                 if (opt->values)
  76                         prop = bind_enum(name, opt, get, set);
  77                 else if (g_variant_is_of_type(opt->def, G_VARIANT_TYPE("d")))
  78                         prop = shared_ptr<Property>(new Double(name, 2, "",
  79                                 none, none, get, set));
  80                 else if (g_variant_is_of_type(opt->def, G_VARIANT_TYPE("x")))
  81                         prop = shared_ptr<Property>(
  82                                 new Int(name, "", none, get, set));
  83                 else if (g_variant_is_of_type(opt->def, G_VARIANT_TYPE("s")))
  84                         prop = shared_ptr<Property>(
  85                                 new String(name, get, set));
  86                 else
  87                         continue;
  88
  89                 properties_.push_back(prop);
  90         }
  91 }
  92
  93 shared_ptr<Property> Decoder::bind_enum(
  94         const QString &name, const srd_decoder_option *option,
  95         Property::Getter getter, Property::Setter setter)
  96 {
  97         vector< pair<Glib::VariantBase, QString> > values;
  98         for (GSList *l = option->values; l; l = l->next) {
  99                 Glib::VariantBase var = Glib::VariantBase((GVariant*)l->data, true);
 100                 values.push_back(make_pair(var, print_gvariant(var)));
 101         }
 102
 103         return shared_ptr<Property>(new Enum(name, values, getter, setter));
 104 }
 105
 106 Glib::VariantBase Decoder::getter(const char *id)
 107 {
 108         GVariant *val = nullptr;
 109
 110         assert(decoder_);
 111
 112         // Get the value from the hash table if it is already present
 113         const map<string, GVariant*>& options = decoder_->options();
 114         const auto iter = options.find(id);
 115
 116         if (iter != options.end())
 117                 val = (*iter).second;
 118         else {
 119                 assert(decoder_->decoder());
 120
 121                 // Get the default value if not
 122                 for (GSList *l = decoder_->decoder()->options; l; l = l->next) {
 123                         const srd_decoder_option *const opt =
 124                                 (srd_decoder_option*)l->data;
 125                         if (strcmp(opt->id, id) == 0) {
 126                                 val = opt->def;
 127                                 break;
 128                         }
 129                 }
 130         }
 131
 132         if (val)
 133                 return Glib::VariantBase(val, true);
 134         else
 135                 return Glib::VariantBase();
 136 }
 137
 138 void Decoder::setter(const char *id, Glib::VariantBase value)
 139 {
 140         assert(decoder_);
 141         decoder_->set_option(id, value.gobj());
 142
 143         assert(decoder_stack_);
 144         decoder_stack_->begin_decode();
 145 }
 146
 147 } // binding
 148 } // pv