git.sesse.net Git - casparcg/blob - core/mixer/mixer.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 "mixer.h"
  25
  26 #include "../frame/frame.h"
  27
  28 #include "audio/audio_mixer.h"
  29 #include "image/image_mixer.h"
  30
  31 #include <common/env.h>
  32 #include <common/executor.h>
  33 #include <common/diagnostics/graph.h>
  34 #include <common/except.h>
  35 #include <common/future.h>
  36 #include <common/timer.h>
  37
  38 #include <core/frame/draw_frame.h>
  39 #include <core/frame/frame_factory.h>
  40 #include <core/frame/frame_transform.h>
  41 #include <core/frame/pixel_format.h>
  42 #include <core/video_format.h>
  43
  44 #include <boost/property_tree/ptree.hpp>
  45 #include <boost/lexical_cast.hpp>
  46
  47 #include <tbb/concurrent_queue.h>
  48 #include <tbb/spin_mutex.h>
  49
  50 #include <unordered_map>
  51 #include <vector>
  52
  53 namespace caspar { namespace core {
  54
  55 struct mixer::impl : boost::noncopyable
  56 {
  57         int                                                                     channel_index_;
  58         spl::shared_ptr<diagnostics::graph> graph_;
  59         audio_mixer                                                     audio_mixer_;
  60         spl::shared_ptr<image_mixer>            image_mixer_;
  61
  62         executor                                                        executor_               { L"mixer " + boost::lexical_cast<std::wstring>(channel_index_) };
  63
  64 public:
  65         impl(int channel_index, spl::shared_ptr<diagnostics::graph> graph, spl::shared_ptr<image_mixer> image_mixer)
  66                 : channel_index_(channel_index)
  67                 , graph_(std::move(graph))
  68                 , image_mixer_(std::move(image_mixer))
  69         {
  70                 graph_->set_color("mix-time", diagnostics::color(1.0f, 0.0f, 0.9f, 0.8f));
  71         }
  72
  73         const_frame operator()(std::map<int, draw_frame> frames, const video_format_desc& format_desc)
  74         {
  75                 caspar::timer frame_timer;
  76
  77                 auto frame = executor_.invoke([=]() mutable -> const_frame
  78                 {
  79                         try
  80                         {
  81                                 detail::set_current_aspect_ratio(
  82                                                 static_cast<double>(format_desc.square_width)
  83                                                 / static_cast<double>(format_desc.square_height));
  84
  85                                 for (auto& frame : frames)
  86                                 {
  87                                         frame.second.accept(audio_mixer_);
  88                                         frame.second.transform().image_transform.layer_depth = 1;
  89                                         frame.second.accept(*image_mixer_);
  90                                 }
  91
  92                                 auto image = (*image_mixer_)(format_desc);
  93                                 auto audio = audio_mixer_(format_desc);
  94
  95                                 auto desc = core::pixel_format_desc(core::pixel_format::bgra);
  96                                 desc.planes.push_back(core::pixel_format_desc::plane(format_desc.width, format_desc.height, 4));
  97                                 return const_frame(std::move(image), std::move(audio), this, desc);
  98                         }
  99                         catch(...)
 100                         {
 101                                 CASPAR_LOG_CURRENT_EXCEPTION();
 102                                 return const_frame::empty();
 103                         }
 104                 });
 105
 106                 graph_->set_value("mix-time", frame_timer.elapsed()*format_desc.fps*0.5);
 107
 108                 return frame;
 109         }
 110
 111         void set_master_volume(float volume)
 112         {
 113                 executor_.begin_invoke([=]
 114                 {
 115                         audio_mixer_.set_master_volume(volume);
 116                 }, task_priority::high_priority);
 117         }
 118
 119         float get_master_volume()
 120         {
 121                 return executor_.invoke([=]
 122                 {
 123                         return audio_mixer_.get_master_volume();
 124                 }, task_priority::high_priority);
 125         }
 126
 127         std::future<boost::property_tree::wptree> info() const
 128         {
 129                 return make_ready_future(boost::property_tree::wptree());
 130         }
 131 };
 132
 133 mixer::mixer(int channel_index, spl::shared_ptr<diagnostics::graph> graph, spl::shared_ptr<image_mixer> image_mixer)
 134         : impl_(new impl(channel_index, std::move(graph), std::move(image_mixer))){}
 135 void mixer::set_master_volume(float volume) { impl_->set_master_volume(volume); }
 136 float mixer::get_master_volume() { return impl_->get_master_volume(); }
 137 std::future<boost::property_tree::wptree> mixer::info() const{return impl_->info();}
 138 const_frame mixer::operator()(std::map<int, draw_frame> frames, const video_format_desc& format_desc){return (*impl_)(std::move(frames), format_desc);}
 139 mutable_frame mixer::create_frame(const void* tag, const core::pixel_format_desc& desc) {return impl_->image_mixer_->create_frame(tag, desc);}
 140 }}