git.sesse.net Git - casparcg/blob - modules/oal/consumer/oal_consumer.cpp

   1 /*\r
   2 * copyright (c) 2010 Sveriges Television AB <info@casparcg.com>\r
   3 *\r
   4 *  This file is part of CasparCG.\r
   5 *\r
   6 *    CasparCG is free software: you can redistribute it and/or modify\r
   7 *    it under the terms of the GNU General Public License as published by\r
   8 *    the Free Software Foundation, either version 3 of the License, or\r
   9 *    (at your option) any later version.\r
  10 *\r
  11 *    CasparCG is distributed in the hope that it will be useful,\r
  12 *    but WITHOUT ANY WARRANTY; without even the implied warranty of\r
  13 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
  14 *    GNU General Public License for more details.\r
  15 \r
  16 *    You should have received a copy of the GNU General Public License\r
  17 *    along with CasparCG.  If not, see <http://www.gnu.org/licenses/>.\r
  18 *\r
  19 */\r
  20  \r
  21 #include "oal_consumer.h"\r
  22 \r
  23 #include <common/diagnostics/graph.h>\r
  24 #include <common/log/log.h>\r
  25 #include <common/utility/timer.h>\r
  26 #include <common/utility/string.h>\r
  27 \r
  28 #include <core/consumer/frame_consumer.h>\r
  29 #include <core/video_format.h>\r
  30 \r
  31 #include <core/mixer/read_frame.h>\r
  32 \r
  33 #include <SFML/Audio.hpp>\r
  34 \r
  35 #include <boost/circular_buffer.hpp>\r
  36 #include <boost/timer.hpp>\r
  37 \r
  38 #include <tbb/concurrent_queue.h>\r
  39 \r
  40 namespace caspar {\r
  41 \r
  42 struct oal_consumer : public core::frame_consumer,  public sf::SoundStream\r
  43 {\r
  44         safe_ptr<diagnostics::graph>                                            graph_;\r
  45         boost::timer                                                                            perf_timer_;\r
  46 \r
  47         tbb::concurrent_bounded_queue<std::vector<short>>       input_;\r
  48         boost::circular_buffer<std::vector<short>>                      container_;\r
  49         tbb::atomic<bool>                                                                       is_running_;\r
  50 \r
  51         core::video_format_desc                                                         format_desc_;\r
  52         int                                                                                                     preroll_count_;\r
  53 public:\r
  54         oal_consumer() \r
  55                 : graph_(diagnostics::create_graph(narrow(print())))\r
  56                 , container_(16)\r
  57                 , preroll_count_(0)\r
  58         {\r
  59                 graph_->add_guide("tick-time", 0.5);\r
  60                 graph_->set_color("tick-time", diagnostics::color(0.1f, 0.7f, 0.8f));\r
  61                 is_running_ = true;\r
  62                 input_.set_capacity(core::consumer_buffer_depth()-2);\r
  63         }\r
  64 \r
  65         ~oal_consumer()\r
  66         {\r
  67                 is_running_ = false;\r
  68                 input_.try_push(std::vector<short>());\r
  69                 input_.try_push(std::vector<short>());\r
  70                 Stop();\r
  71                 CASPAR_LOG(info) << print() << L" Shutting down.";      \r
  72         }\r
  73 \r
  74         virtual void initialize(const core::video_format_desc& format_desc)\r
  75         {\r
  76                 format_desc_ = format_desc;             \r
  77                 sf::SoundStream::Initialize(2, 48000);\r
  78                 Play();         \r
  79                 CASPAR_LOG(info) << print() << " Sucessfully initialized.";\r
  80         }\r
  81         \r
  82         virtual bool send(const safe_ptr<core::read_frame>& frame)\r
  83         {                       \r
  84                 if(preroll_count_ < input_.capacity())\r
  85                 {\r
  86                         while(input_.try_push(std::vector<int16_t>(format_desc_.audio_samples_per_frame, 0)))\r
  87                                 ++preroll_count_;\r
  88                 }\r
  89 \r
  90                 input_.push(std::vector<int16_t>(frame->audio_data().begin(), frame->audio_data().end()));      \r
  91 \r
  92                 return true;\r
  93         }\r
  94         \r
  95         virtual bool OnGetData(sf::SoundStream::Chunk& data)\r
  96         {               \r
  97                 std::vector<short> audio_data;          \r
  98                 input_.pop(audio_data);\r
  99                                 \r
 100                 container_.push_back(std::move(audio_data));\r
 101                 data.Samples = container_.back().data();\r
 102                 data.NbSamples = container_.back().size();      \r
 103                 \r
 104                 graph_->update_value("tick-time", perf_timer_.elapsed()*format_desc_.fps*0.5);          \r
 105                 perf_timer_.restart();\r
 106 \r
 107                 return is_running_;\r
 108         }\r
 109 \r
 110         virtual std::wstring print() const\r
 111         {\r
 112                 return L"oal[" + format_desc_.name + L"]";\r
 113         }\r
 114 \r
 115         virtual const core::video_format_desc& get_video_format_desc() const\r
 116         {\r
 117                 return format_desc_;\r
 118         }\r
 119 };\r
 120 \r
 121 safe_ptr<core::frame_consumer> create_oal_consumer(const std::vector<std::wstring>& params)\r
 122 {\r
 123         if(params.size() < 1 || params[0] != L"OAL")\r
 124                 return core::frame_consumer::empty();\r
 125 \r
 126         return make_safe<oal_consumer>();\r
 127 }\r
 128 \r
 129 safe_ptr<core::frame_consumer> create_oal_consumer()\r
 130 {\r
 131         return make_safe<oal_consumer>();\r
 132 }\r
 133 \r
 134 }\r