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/legacy_decoder.hpp>
  23 #include <stdexcept>
  24 #include <gstreamermm/private/basesink_p.h>
  25
  26 namespace Srf
  27 {
  28
  29 using namespace std;
  30
  31 #ifdef HAVE_LIBSIGROKDECODE
  32 void LegacyDecoder::class_init(Gst::ElementClass<LegacyDecoder> *klass)
  33 {
  34         klass->set_metadata("sigrok legacy decoder",
  35                         "Sink", "Wrapper for protocol decoders using legacy libsigrokdecode APIs",
  36                         "Uwe Hermann");
  37
  38         klass->add_pad_template(Gst::PadTemplate::create(
  39                         "sink",
  40                         Gst::PAD_SINK,
  41                         Gst::PAD_ALWAYS,
  42                         Gst::Caps::create_any()));
  43 }
  44
  45 bool LegacyDecoder::register_element(Glib::RefPtr<Gst::Plugin> plugin)
  46 {
  47         Gst::ElementFactory::register_element(plugin, "sigrok_legacy_decoder",
  48                         0, Gst::register_mm_type<LegacyDecoder>(
  49                                 "sigrok_legacy_decoder"));
  50
  51         return true;
  52 }
  53
  54 LegacyDecoder::LegacyDecoder(GstBaseSink *gobj) :
  55         Glib::ObjectBase(typeid(LegacyDecoder)),
  56         Sink(gobj)
  57 {
  58 }
  59
  60 Glib::RefPtr<LegacyDecoder>LegacyDecoder::create(
  61         struct srd_session *libsigrokdecode_session, uint64_t unitsize)
  62 {
  63         auto element = Gst::ElementFactory::create_element("sigrok_legacy_decoder");
  64         if (!element)
  65                 throw runtime_error("Failed to create element - plugin not registered?");
  66         auto decoder = Glib::RefPtr<LegacyDecoder>::cast_static(element);
  67         decoder->session_ = libsigrokdecode_session;
  68         decoder->unitsite_ = unitsize;
  69
  70         return decoder;
  71 }
  72
  73 struct srd_session *LegacyDecoder::libsigrokdecode_session()
  74 {
  75         return session_;
  76 }
  77
  78 Gst::FlowReturn LegacyDecoder::render_vfunc(const Glib::RefPtr<Gst::Buffer> &buffer)
  79 {
  80         Gst::MapInfo info;
  81         buffer->map(info, Gst::MAP_READ);
  82         uint64_t num_samples = info.get_size() / unitsite_;
  83         srd_session_send(session_, abs_ss_, abs_ss_ + num_samples,
  84                 info.get_data(), info.get_size(), unitsite_);
  85         abs_ss_ += num_samples;
  86         buffer->unmap(info);
  87
  88         return Gst::FLOW_OK;
  89 }
  90
  91 bool LegacyDecoder::start_vfunc()
  92 {
  93         abs_ss_ = 0;
  94         srd_session_start(session_);
  95
  96         return true;
  97 }
  98
  99 bool LegacyDecoder::stop_vfunc()
 100 {
 101         srd_session_terminate_reset(session_);
 102
 103         return true;
 104 }
 105 #endif
 106
 107 }