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/exception/exceptions.h>\r
  24 #include <common/diagnostics/graph.h>\r
  25 #include <common/log/log.h>\r
  26 #include <common/utility/timer.h>\r
  27 #include <common/utility/string.h>\r
  28 \r
  29 #include <core/consumer/frame_consumer.h>\r
  30 #include <core/video_format.h>\r
  31 \r
  32 #include <core/mixer/read_frame.h>\r
  33 \r
  34 #include <SFML/Audio.hpp>\r
  35 \r
  36 #include <boost/circular_buffer.hpp>\r
  37 #include <boost/timer.hpp>\r
  38 \r
  39 #include <tbb/concurrent_queue.h>\r
  40 \r
  41 namespace caspar {\r
  42 \r
  43 struct oal_consumer : public core::frame_consumer,  public sf::SoundStream\r
  44 {\r
  45         safe_ptr<diagnostics::graph>                                            graph_;\r
  46         boost::timer                                                                            perf_timer_;\r
  47 \r
  48         tbb::concurrent_bounded_queue<std::shared_ptr<std::vector<short>>>      input_;\r
  49         boost::circular_buffer<std::vector<short>>                      container_;\r
  50         tbb::atomic<bool>                                                                       is_running_;\r
  51 \r
  52         core::video_format_desc                                                         format_desc_;\r
  53         int                                                                                                     preroll_count_;\r
  54 public:\r
  55         oal_consumer() \r
  56                 : graph_(diagnostics::create_graph(narrow(print())))\r
  57                 , container_(16)\r
  58                 , preroll_count_(0)\r
  59         {\r
  60                 if(core::consumer_buffer_depth() < 3)\r
  61                         BOOST_THROW_EXCEPTION(invalid_argument() << msg_info("audio-consumer does not support buffer-depth lower than 3."));\r
  62 \r
  63                 graph_->add_guide("tick-time", 0.5);\r
  64                 graph_->set_color("tick-time", diagnostics::color(0.0f, 0.6f, 0.9f));   \r
  65                 is_running_ = true;\r
  66                 input_.set_capacity(core::consumer_buffer_depth()-2);\r
  67         }\r
  68 \r
  69         ~oal_consumer()\r
  70         {\r
  71                 is_running_ = false;\r
  72                 input_.try_push(std::make_shared<std::vector<short>>());\r
  73                 input_.try_push(std::make_shared<std::vector<short>>());\r
  74                 Stop();\r
  75                 CASPAR_LOG(info) << print() << L" Shutting down.";      \r
  76         }\r
  77 \r
  78         virtual void initialize(const core::video_format_desc& format_desc)\r
  79         {\r
  80                 format_desc_ = format_desc;             \r
  81                 sf::SoundStream::Initialize(2, 48000);\r
  82                 CASPAR_LOG(info) << print() << " Sucessfully initialized.";\r
  83         }\r
  84         \r
  85         virtual bool send(const safe_ptr<core::read_frame>& frame)\r
  86         {                       \r
  87                 if(preroll_count_ < input_.capacity())\r
  88                 {\r
  89                         while(input_.try_push(std::make_shared<std::vector<int16_t>>(format_desc_.audio_samples_per_frame, 0)))\r
  90                                 ++preroll_count_;\r
  91                         Play();         \r
  92                 }\r
  93 \r
  94                 std::vector<int16_t> audio16(frame->audio_data().size());\r
  95                 for(size_t n = 0; n < audio16.size(); ++n)              \r
  96                         audio16[n] = (frame->audio_data()[n] >> 16) & 0xffff;           \r
  97 \r
  98                 input_.push(std::make_shared<std::vector<int16_t>>(std::move(audio16)));\r
  99 \r
 100                 return true;\r
 101         }\r
 102         \r
 103         virtual bool OnGetData(sf::SoundStream::Chunk& data)\r
 104         {               \r
 105                 std::shared_ptr<std::vector<short>> audio_data;         \r
 106                 input_.pop(audio_data);\r
 107                                 \r
 108                 container_.push_back(std::move(*audio_data));\r
 109                 data.Samples = container_.back().data();\r
 110                 data.NbSamples = container_.back().size();      \r
 111                 \r
 112                 graph_->update_value("tick-time", perf_timer_.elapsed()*format_desc_.fps*0.5);          \r
 113                 perf_timer_.restart();\r
 114 \r
 115                 return is_running_;\r
 116         }\r
 117 \r
 118         virtual std::wstring print() const\r
 119         {\r
 120                 return L"oal[" + format_desc_.name + L"]";\r
 121         }\r
 122 \r
 123         virtual const core::video_format_desc& get_video_format_desc() const\r
 124         {\r
 125                 return format_desc_;\r
 126         }\r
 127 };\r
 128 \r
 129 safe_ptr<core::frame_consumer> create_oal_consumer(const std::vector<std::wstring>& params)\r
 130 {\r
 131         if(params.size() < 1 || params[0] != L"OAL")\r
 132                 return core::frame_consumer::empty();\r
 133 \r
 134         return make_safe<oal_consumer>();\r
 135 }\r
 136 \r
 137 safe_ptr<core::frame_consumer> create_oal_consumer()\r
 138 {\r
 139         return make_safe<oal_consumer>();\r
 140 }\r
 141 \r
 142 }\r