git.sesse.net Git - casparcg/blob - core/consumer/oal/oal_frame_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 "../../StdAfx.h"\r
  22 \r
  23 #include "oal_frame_consumer.h"\r
  24 \r
  25 #include "../../frame/gpu_frame.h"\r
  26 #include "../../frame/frame_format.h"\r
  27 \r
  28 #include <SFML/Audio.hpp>\r
  29 \r
  30 #include <boost/circular_buffer.hpp>\r
  31 #include <boost/foreach.hpp>\r
  32 \r
  33 #include <windows.h>\r
  34 \r
  35 namespace caspar{ namespace audio{      \r
  36 \r
  37 class sound_channel : public sf::SoundStream\r
  38 {\r
  39 public:\r
  40         sound_channel() : internal_chunks_(5), silence_(1920*2, 0)\r
  41         {\r
  42                 external_chunks_.set_capacity(3);\r
  43                 sf::SoundStream::Initialize(2, 48000);\r
  44         }\r
  45 \r
  46         ~sound_channel()\r
  47         {\r
  48                 external_chunks_.clear();\r
  49                 external_chunks_.push(nullptr);\r
  50                 Stop();\r
  51         }\r
  52         \r
  53         void push(const gpu_frame_ptr& frame)\r
  54         {\r
  55                 if(frame->audio_data().empty())\r
  56                         frame->audio_data() = silence_;\r
  57 \r
  58                 //if(!external_chunks_.try_push(frame))\r
  59                 //{\r
  60                         //CASPAR_LOG(debug) << "Sound Buffer Overrun";\r
  61                         external_chunks_.push(frame);\r
  62                 //}\r
  63 \r
  64                 if(GetStatus() != Playing && external_chunks_.size() >= 3)\r
  65                         Play();\r
  66         }\r
  67 \r
  68 private:\r
  69 \r
  70         bool OnStart() \r
  71         {\r
  72                 external_chunks_.clear();\r
  73                 return true;\r
  74         }\r
  75 \r
  76         bool OnGetData(sf::SoundStream::Chunk& data)\r
  77     {\r
  78                 gpu_frame_ptr frame;\r
  79                 //if(!external_chunks_.try_pop(frame))\r
  80                 //{\r
  81                         //CASPAR_LOG(trace) << "Sound Buffer Underrun";\r
  82                         external_chunks_.pop(frame);\r
  83                 //}\r
  84 \r
  85                 if(frame == nullptr)\r
  86                 {\r
  87                         external_chunks_.clear();\r
  88                         return false;\r
  89                 }\r
  90 \r
  91                 internal_chunks_.push_back(frame);\r
  92                 //SetVolume(pChunk->volume());\r
  93                 data.Samples = reinterpret_cast<sf::Int16*>(frame->audio_data().data());\r
  94                 data.NbSamples = frame->audio_data().size();\r
  95         return true;\r
  96     }\r
  97 \r
  98         std::vector<short> silence_;\r
  99         boost::circular_buffer<gpu_frame_ptr> internal_chunks_;\r
 100         tbb::concurrent_bounded_queue<gpu_frame_ptr> external_chunks_;\r
 101 };\r
 102 typedef std::shared_ptr<sound_channel> sound_channelPtr;\r
 103 \r
 104 struct oal_frame_consumer::implementation : boost::noncopyable\r
 105 {       \r
 106         implementation(const frame_format_desc& format_desc) : format_desc_(format_desc)\r
 107         {\r
 108         }\r
 109         \r
 110         void push(const gpu_frame_ptr& frame)\r
 111         {\r
 112                 channel_.push(frame);\r
 113         }\r
 114                 \r
 115         sound_channel channel_;\r
 116 \r
 117         caspar::frame_format_desc format_desc_;\r
 118 };\r
 119 \r
 120 oal_frame_consumer::oal_frame_consumer(const caspar::frame_format_desc& format_desc) : impl_(new implementation(format_desc)){}\r
 121 const caspar::frame_format_desc& oal_frame_consumer::get_frame_format_desc() const{return impl_->format_desc_;}\r
 122 void oal_frame_consumer::prepare(const gpu_frame_ptr& frame){impl_->push(frame);}\r
 123 }}\r