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, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <libsigrokdecode/libsigrokdecode.h>
  21
  22 #include "decoder.hpp"
  23
  24 #include <boost/none_t.hpp>
  25
  26 #include <pv/data/decoderstack.hpp>
  27 #include <pv/data/decode/decoder.hpp>
  28 #include <pv/prop/double.hpp>
  29 #include <pv/prop/enum.hpp>
  30 #include <pv/prop/int.hpp>
  31 #include <pv/prop/string.hpp>
  32
  33 using boost::none;
  34 using std::make_pair;
  35 using std::map;
  36 using std::pair;
  37 using std::shared_ptr;
  38 using std::string;
  39 using std::vector;
  40
  41 using pv::prop::Double;
  42 using pv::prop::Enum;
  43 using pv::prop::Int;
  44 using pv::prop::Property;
  45 using pv::prop::String;
  46
  47 namespace pv {
  48 namespace binding {
  49
  50 Decoder::Decoder(
  51         shared_ptr<pv::data::DecoderStack> decoder_stack,
  52         shared_ptr<data::decode::Decoder> decoder) :
  53         decoder_stack_(decoder_stack),
  54         decoder_(decoder)
  55 {
  56         assert(decoder_);
  57
  58         const srd_decoder *const dec = decoder_->decoder();
  59         assert(dec);
  60
  61         for (GSList *l = dec->options; l; l = l->next) {
  62                 const srd_decoder_option *const opt =
  63                         (srd_decoder_option*)l->data;
  64
  65                 const QString name = QString::fromUtf8(opt->desc);
  66
  67                 const Property::Getter get = [&, opt]() {
  68                         return getter(opt->id); };
  69                 const Property::Setter set = [&, opt](Glib::VariantBase value) {
  70                         setter(opt->id, value); };
  71
  72                 shared_ptr<Property> prop;
  73
  74                 if (opt->values)
  75                         prop = bind_enum(name, opt, get, set);
  76                 else if (g_variant_is_of_type(opt->def, G_VARIANT_TYPE("d")))
  77                         prop = shared_ptr<Property>(new Double(name, 2, "",
  78                                 none, none, get, set));
  79                 else if (g_variant_is_of_type(opt->def, G_VARIANT_TYPE("x")))
  80                         prop = shared_ptr<Property>(
  81                                 new Int(name, "", none, get, set));
  82                 else if (g_variant_is_of_type(opt->def, G_VARIANT_TYPE("s")))
  83                         prop = shared_ptr<Property>(
  84                                 new String(name, get, set));
  85                 else
  86                         continue;
  87
  88                 properties_.push_back(prop);
  89         }
  90 }
  91
  92 shared_ptr<Property> Decoder::bind_enum(
  93         const QString &name, const srd_decoder_option *option,
  94         Property::Getter getter, Property::Setter setter)
  95 {
  96         vector< pair<Glib::VariantBase, QString> > values;
  97         for (GSList *l = option->values; l; l = l->next) {
  98                 Glib::VariantBase var = Glib::VariantBase((GVariant*)l->data, true);
  99                 values.push_back(make_pair(var, print_gvariant(var)));
 100         }
 101
 102         return shared_ptr<Property>(new Enum(name, values, getter, setter));
 103 }
 104
 105 Glib::VariantBase Decoder::getter(const char *id)
 106 {
 107         GVariant *val = nullptr;
 108
 109         assert(decoder_);
 110
 111         // Get the value from the hash table if it is already present
 112         const map<string, GVariant*>& options = decoder_->options();
 113         const auto iter = options.find(id);
 114
 115         if (iter != options.end())
 116                 val = (*iter).second;
 117         else {
 118                 assert(decoder_->decoder());
 119
 120                 // Get the default value if not
 121                 for (GSList *l = decoder_->decoder()->options; l; l = l->next) {
 122                         const srd_decoder_option *const opt =
 123                                 (srd_decoder_option*)l->data;
 124                         if (strcmp(opt->id, id) == 0) {
 125                                 val = opt->def;
 126                                 break;
 127                         }
 128                 }
 129         }
 130
 131         return (val) ? Glib::VariantBase(val, true) : Glib::VariantBase();
 132 }
 133
 134 void Decoder::setter(const char *id, Glib::VariantBase value)
 135 {
 136         assert(decoder_);
 137         decoder_->set_option(id, value.gobj());
 138
 139         assert(decoder_stack_);
 140         decoder_stack_->begin_decode();
 141 }
 142
 143 }  // namespace binding
 144 }  // namespace pv