src/legacy_decoder.cpp

   1 /*
   2  * This file is part of the libsigrokflow project.
   3  *
   4  * Copyright (C) 2018 Martin Ling <martin-sigrok@earth.li>
   5  * Copyright (C) 2018 Uwe Hermann <uwe@hermann-uwe.de>
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation, either version 3 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include <config.h>
  22 #include <libsigrokflow/libsigrokflow.hpp>
  23
  24 namespace Srf
  25 {
  26
  27 using namespace std;
  28
  29 #ifdef HAVE_LIBSIGROKDECODE
  30 void LegacyDecoder::class_init(Gst::ElementClass<LegacyDecoder> *klass)
  31 {
  32         klass->set_metadata("sigrok legacy decoder",
  33                         "Sink", "Wrapper for protocol decoders using legacy libsigrokdecode APIs",
  34                         "Uwe Hermann");
  35
  36         klass->add_pad_template(Gst::PadTemplate::create(
  37                         "sink",
  38                         Gst::PAD_SINK,
  39                         Gst::PAD_ALWAYS,
  40                         Gst::Caps::create_any()));
  41 }
  42
  43 bool LegacyDecoder::register_element(Glib::RefPtr<Gst::Plugin> plugin)
  44 {
  45         Gst::ElementFactory::register_element(plugin, "sigrok_legacy_decoder",
  46                         0, Gst::register_mm_type<LegacyDecoder>(
  47                                 "sigrok_legacy_decoder"));
  48
  49         return true;
  50 }
  51
  52 LegacyDecoder::LegacyDecoder(GstBaseSink *gobj) :
  53         Glib::ObjectBase(typeid(LegacyDecoder)),
  54         Sink(gobj)
  55 {
  56 }
  57
  58 Glib::RefPtr<LegacyDecoder>LegacyDecoder::create(
  59         struct srd_session *libsigrokdecode_session, uint64_t unitsize)
  60 {
  61         auto element = Gst::ElementFactory::create_element("sigrok_legacy_decoder");
  62         if (!element)
  63                 throw runtime_error("Failed to create element - plugin not registered?");
  64         auto decoder = Glib::RefPtr<LegacyDecoder>::cast_static(element);
  65         decoder->session_ = libsigrokdecode_session;
  66         decoder->unitsite_ = unitsize;
  67
  68         return decoder;
  69 }
  70
  71 struct srd_session *LegacyDecoder::libsigrokdecode_session()
  72 {
  73         return session_;
  74 }
  75
  76 Gst::FlowReturn LegacyDecoder::render_vfunc(const Glib::RefPtr<Gst::Buffer> &buffer)
  77 {
  78         Gst::MapInfo info;
  79         buffer->map(info, Gst::MAP_READ);
  80         uint64_t num_samples = info.get_size() / unitsite_;
  81         srd_session_send(session_, abs_ss_, abs_ss_ + num_samples,
  82                 info.get_data(), info.get_size(), unitsite_);
  83         abs_ss_ += num_samples;
  84         buffer->unmap(info);
  85
  86         return Gst::FLOW_OK;
  87 }
  88
  89 bool LegacyDecoder::start_vfunc()
  90 {
  91         abs_ss_ = 0;
  92         srd_session_start(session_);
  93
  94         return true;
  95 }
  96
  97 bool LegacyDecoder::stop_vfunc()
  98 {
  99         srd_session_terminate_reset(session_);
 100
 101         return true;
 102 }
 103 #endif
 104
 105 }