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