git.sesse.net Git - casparcg/blob - modules/reroute/producer/reroute_producer.cpp

   1 /*
   2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>
   3 *
   4 * This file is part of CasparCG (www.casparcg.com).
   5 *
   6 * CasparCG 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 3 of the License, or
   9 * (at your option) any later version.
  10 *
  11 * CasparCG 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 CasparCG. If not, see <http://www.gnu.org/licenses/>.
  18 *
  19 * Author: Robert Nagy, ronag89@gmail.com
  20 */
  21
  22 #include "../stdafx.h"
  23
  24 #include "reroute_producer.h"
  25 #include "layer_producer.h"
  26 #include "channel_producer.h"
  27
  28 #include <common/param.h>
  29
  30 #include <core/producer/frame_producer.h>
  31 #include <core/video_channel.h>
  32 #include <core/help/help_sink.h>
  33 #include <core/help/help_repository.h>
  34
  35 #include <boost/algorithm/string.hpp>
  36 #include <boost/range/algorithm/find_if.hpp>
  37
  38 namespace caspar { namespace reroute {
  39
  40 void describe_producer(core::help_sink& sink, const core::help_repository& repository)
  41 {
  42         sink.short_description(L"Reroutes a complete channel or a layer to another layer.");
  43         sink.syntax(L"route://[source_channel:int]{-[source_layer:int]} {FRAMES_DELAY [frames_delay:int]}");
  44         sink.para()->text(L"Reroutes the composited video of a channel or the untransformed video of a layer.");
  45         sink.para()
  46                 ->text(L"If ")->code(L"source_layer")->text(L" is specified, only the video of the source layer is rerouted. ")
  47                 ->text(L"If on the other hand only ")->code(L"source_channel")->text(L" is specified, the video of the complete channel is rerouted.");
  48         sink.para()
  49                 ->text(L"An optional additional delay can be specified with the ")->code(L"frames_delay")
  50                 ->text(L" parameter.");
  51         sink.para()->text(L"Examples:");
  52         sink.example(L">> PLAY 1-10 route://1-11", L"Play the contents of layer 1-11 on layer 1-10 as well.");
  53         sink.example(L">> PLAY 1-10 route://2", L"Play the composited contents of channel 2 on layer 1-10 as well.");
  54         sink.example(
  55                 L">> MIXER 1-10 FILL 0.02 0.01 0.9 0.9\n"
  56                 L">> PLAY 1-10 route://1\n"
  57                 L">> PLAY 1-9 AMB LOOP", L"Play the composited contents of channel 1 on layer 1-10. Since the source and destination channel is the same, an \"infinity\" effect is created.");
  58         sink.example(L">> PLAY 1-10 route://1-11 FRAMES_DELAY 10", L"Play the contents of layer 1-11 on layer 1-10 as well with an added 10 frames delay.");
  59         sink.para()
  60                 ->text(L"Always expect a few frames delay on the routed-to layer in addition to the optionally specified ")
  61                 ->code(L"frames_delay")->text(L" parameter.");
  62 }
  63
  64 spl::shared_ptr<core::frame_producer> create_producer(
  65                 const core::frame_producer_dependencies& dependencies,
  66                 const std::vector<std::wstring>& params)
  67 {
  68         static const std::wstring PREFIX = L"route://";
  69
  70         if (params.empty() ||
  71                 !boost::starts_with(params.at(0), PREFIX) ||
  72                 boost::ends_with(params.at(0), L"_A") ||
  73                 boost::ends_with(params.at(0), L"_ALPHA"))
  74         {
  75                 return core::frame_producer::empty();
  76         }
  77
  78         auto& url = params.at(0);
  79         auto channel_layer_spec = url.substr(PREFIX.length());
  80         auto dash = channel_layer_spec.find(L"-");
  81         bool has_layer_spec = dash != std::wstring::npos;
  82         int channel_id;
  83
  84         if (has_layer_spec)
  85                 channel_id = boost::lexical_cast<int>(channel_layer_spec.substr(0, dash));
  86         else
  87                 channel_id = boost::lexical_cast<int>(channel_layer_spec);
  88
  89         auto found_channel = boost::find_if(dependencies.channels, [=](spl::shared_ptr<core::video_channel> ch) { return ch->index() == channel_id; });
  90
  91         if (found_channel == dependencies.channels.end())
  92                 CASPAR_THROW_EXCEPTION(user_error() << msg_info(L"No channel with id " + boost::lexical_cast<std::wstring>(channel_id)));
  93
  94         auto params2 = params;
  95         params2.erase(params2.begin());
  96
  97         auto frames_delay = get_param(L"FRAMES_DELAY", params2, 0);
  98
  99         if (has_layer_spec)
 100         {
 101                 auto layer = boost::lexical_cast<int>(channel_layer_spec.substr(dash + 1));
 102
 103                 return create_layer_producer(*found_channel, layer, frames_delay, dependencies.format_desc);
 104         }
 105         else
 106         {
 107                 return create_channel_producer(dependencies, *found_channel, frames_delay);
 108         }
 109 }
 110
 111 }}