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 \r
  27 #include <core/video_format.h>\r
  28 \r
  29 #include <core/mixer/read_frame.h>\r
  30 \r
  31 #include <SFML/Audio.hpp>\r
  32 \r
  33 #include <boost/circular_buffer.hpp>\r
  34 #include <boost/timer.hpp>\r
  35 \r
  36 #include <tbb/concurrent_queue.h>\r
  37 \r
  38 namespace caspar {\r
  39 \r
  40 struct oal_consumer::implementation : public sf::SoundStream, boost::noncopyable\r
  41 {\r
  42         safe_ptr<diagnostics::graph> graph_;\r
  43         boost::timer perf_timer_;\r
  44 \r
  45         tbb::concurrent_bounded_queue<std::vector<short>> input_;\r
  46         boost::circular_buffer<std::vector<short>> container_;\r
  47         tbb::atomic<bool> is_running_;\r
  48 \r
  49         core::video_format_desc format_desc_;\r
  50         int preroll_count_;\r
  51 public:\r
  52         implementation(const core::video_format_desc& format_desc) \r
  53                 : graph_(diagnostics::create_graph(narrow(print())))\r
  54                 , container_(5)\r
  55                 , format_desc_(format_desc)\r
  56                 , preroll_count_(0)\r
  57         {\r
  58                 graph_->add_guide("tick-time", 0.5);\r
  59                 graph_->set_color("tick-time", diagnostics::color(0.1f, 0.7f, 0.8f));\r
  60                 is_running_ = true;\r
  61                 input_.set_capacity(CONSUMER_BUFFER_DEPTH-2);\r
  62                 \r
  63                 sf::SoundStream::Initialize(2, 48000);\r
  64                 Play();         \r
  65                 CASPAR_LOG(info) << print() << " Sucessfully initialized.";\r
  66         }\r
  67 \r
  68         ~implementation()\r
  69         {\r
  70                 is_running_ = false;\r
  71                 input_.try_push(std::vector<short>());\r
  72                 input_.try_push(std::vector<short>());\r
  73                 Stop();\r
  74                 CASPAR_LOG(info) << print() << L" Shutting down.";      \r
  75         }\r
  76         \r
  77         void send(const safe_ptr<core::read_frame>& frame)\r
  78         {                       \r
  79                 if(preroll_count_ < input_.capacity())\r
  80                 {\r
  81                         while(input_.try_push(std::vector<short>(format_desc_.audio_samples_per_frame, 0)))\r
  82                                 ++preroll_count_;\r
  83                 }\r
  84 \r
  85                 if(!frame->audio_data().empty())\r
  86                         input_.push(std::vector<short>(frame->audio_data().begin(), frame->audio_data().end()));        \r
  87                 else\r
  88                         input_.push(std::vector<short>(format_desc_.audio_samples_per_frame, 0)); //static_cast<size_t>(48000.0f/format_desc_.fps)*2\r
  89         }\r
  90 \r
  91         size_t buffer_depth() const{return 3;}\r
  92 \r
  93         virtual bool OnGetData(sf::SoundStream::Chunk& data)\r
  94         {               \r
  95                 std::vector<short> audio_data;          \r
  96                 input_.pop(audio_data);\r
  97                                 \r
  98                 container_.push_back(std::move(audio_data));\r
  99                 data.Samples = container_.back().data();\r
 100                 data.NbSamples = container_.back().size();      \r
 101                 \r
 102                 graph_->update_value("tick-time", perf_timer_.elapsed()*format_desc_.fps*0.5);          \r
 103                 perf_timer_.restart();\r
 104 \r
 105                 return is_running_;\r
 106         }\r
 107 \r
 108         std::wstring print() const\r
 109         {\r
 110                 return L"oal[" + format_desc_.name + L"]";\r
 111         }\r
 112 };\r
 113 \r
 114 oal_consumer::oal_consumer(){}\r
 115 oal_consumer::oal_consumer(oal_consumer&& other) : impl_(std::move(other.impl_)){}\r
 116 void oal_consumer::send(const safe_ptr<core::read_frame>& frame){impl_->send(frame);}\r
 117 size_t oal_consumer::buffer_depth() const{return impl_->buffer_depth();}\r
 118 void oal_consumer::initialize(const core::video_format_desc& format_desc){impl_.reset(new implementation(format_desc));}\r
 119 std::wstring oal_consumer::print() const { return impl_->print(); }\r
 120 const core::video_format_desc& oal_consumer::get_video_format_desc() const{return impl_->format_desc_;}\r
 121 \r
 122 safe_ptr<core::frame_consumer> create_oal_consumer(const std::vector<std::wstring>& params)\r
 123 {\r
 124         if(params.size() < 1 || params[0] != L"OAL")\r
 125                 return core::frame_consumer::empty();\r
 126 \r
 127         return make_safe<oal_consumer>();\r
 128 }\r
 129 }\r