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

   1 /*\r
   2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>\r
   3 *\r
   4 * This file is part of CasparCG (www.casparcg.com).\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 * Author: Robert Nagy, ronag89@gmail.com\r
  20 */\r
  21 \r
  22 #include "oal_consumer.h"\r
  23 \r
  24 #include <common/except.h>\r
  25 #include <common/diagnostics/graph.h>\r
  26 #include <common/log.h>\r
  27 #include <common/utf.h>\r
  28 #include <common/env.h>\r
  29 \r
  30 #include <core/consumer/frame_consumer.h>\r
  31 #include <core/frame/frame.h>\r
  32 #include <core/mixer/audio/audio_util.h>\r
  33 #include <core/mixer/audio/audio_mixer.h>\r
  34 #include <core/video_format.h>\r
  35 \r
  36 #include <SFML/Audio/SoundStream.hpp>\r
  37 \r
  38 #include <boost/circular_buffer.hpp>\r
  39 #include <boost/lexical_cast.hpp>\r
  40 #include <boost/property_tree/ptree.hpp>\r
  41 #include <boost/timer.hpp>\r
  42 \r
  43 #include <tbb/concurrent_queue.h>\r
  44 \r
  45 namespace caspar { namespace oal {\r
  46 \r
  47 typedef std::vector<int16_t, tbb::cache_aligned_allocator<int16_t>> audio_buffer_16;\r
  48 \r
  49 struct oal_consumer : public core::frame_consumer,  public sf::SoundStream\r
  50 {\r
  51         spl::shared_ptr<diagnostics::graph>                                     graph_;\r
  52         boost::timer                                                                            perf_timer_;\r
  53         int                                                                                                     channel_index_;\r
  54 \r
  55         tbb::concurrent_bounded_queue<std::shared_ptr<audio_buffer_16>> input_;\r
  56         boost::circular_buffer<audio_buffer_16>                         container_;\r
  57         tbb::atomic<bool>                                                                       is_running_;\r
  58         bool                                                                                            set_thread_priority_;\r
  59 \r
  60         core::video_format_desc                                                         format_desc_;\r
  61 public:\r
  62         oal_consumer() \r
  63                 : container_(16)\r
  64                 , channel_index_(-1)\r
  65                 , set_thread_priority_(true)\r
  66         {\r
  67                 graph_->set_color("tick-time", diagnostics::color(0.0f, 0.6f, 0.9f));   \r
  68                 graph_->set_color("dropped-frame", diagnostics::color(0.3f, 0.6f, 0.3f));\r
  69                 diagnostics::register_graph(graph_);\r
  70 \r
  71                 is_running_ = true;\r
  72                 input_.set_capacity(1);\r
  73         }\r
  74 \r
  75         ~oal_consumer()\r
  76         {\r
  77                 is_running_ = false;\r
  78                 input_.try_push(std::make_shared<audio_buffer_16>());\r
  79                 input_.try_push(std::make_shared<audio_buffer_16>());\r
  80                 Stop();\r
  81                 input_.try_push(std::make_shared<audio_buffer_16>());\r
  82                 input_.try_push(std::make_shared<audio_buffer_16>());\r
  83         }\r
  84 \r
  85         // frame consumer\r
  86 \r
  87         void initialize(const core::video_format_desc& format_desc, int channel_index) override\r
  88         {\r
  89                 format_desc_    = format_desc;          \r
  90                 channel_index_  = channel_index;\r
  91                 graph_->set_text(print());\r
  92 \r
  93                 if(Status() != Playing)\r
  94                 {\r
  95                         sf::SoundStream::Initialize(2, 48000);\r
  96                         Play();         \r
  97                 }\r
  98         }\r
  99         \r
 100         bool send(core::const_frame frame) override\r
 101         {                       \r
 102                 if(!input_.try_push(std::make_shared<audio_buffer_16>(core::audio_32_to_16(frame.audio_data()))))\r
 103                         graph_->set_tag("dropped-frame");\r
 104 \r
 105                 return true;\r
 106         }\r
 107         \r
 108         std::wstring print() const override\r
 109         {\r
 110                 return L"oal[" + boost::lexical_cast<std::wstring>(channel_index_) + L"|" + format_desc_.name + L"]";\r
 111         }\r
 112 \r
 113         std::wstring name() const override\r
 114         {\r
 115                 return L"system-audio";\r
 116         }\r
 117 \r
 118         boost::property_tree::wptree info() const override\r
 119         {\r
 120                 boost::property_tree::wptree info;\r
 121                 info.add(L"type", L"system-audio");\r
 122                 return info;\r
 123         }\r
 124         \r
 125         bool has_synchronization_clock() const override\r
 126         {\r
 127                 return false;\r
 128         }\r
 129         \r
 130         int buffer_depth() const override\r
 131         {\r
 132                 return 3;\r
 133         }\r
 134 \r
 135         // oal_consumer\r
 136         \r
 137         bool OnGetData(sf::SoundStream::Chunk& data) override\r
 138         {               \r
 139                 if(set_thread_priority_)\r
 140                 {\r
 141                         SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_ABOVE_NORMAL);\r
 142                         set_thread_priority_ = false;\r
 143                 }\r
 144 \r
 145                 std::shared_ptr<audio_buffer_16> audio_data;            \r
 146                 input_.pop(audio_data);\r
 147                                 \r
 148                 container_.push_back(std::move(*audio_data));\r
 149                 data.Samples = container_.back().data();\r
 150                 data.NbSamples = container_.back().size();      \r
 151                 \r
 152                 graph_->set_value("tick-time", perf_timer_.elapsed()*format_desc_.fps*0.5);             \r
 153                 perf_timer_.restart();\r
 154 \r
 155                 return is_running_;\r
 156         }\r
 157 \r
 158         int index() const override\r
 159         {\r
 160                 return 500;\r
 161         }\r
 162 };\r
 163 \r
 164 spl::shared_ptr<core::frame_consumer> create_consumer(const std::vector<std::wstring>& params)\r
 165 {\r
 166         if(params.size() < 1 || params[0] != L"AUDIO")\r
 167                 return core::frame_consumer::empty();\r
 168 \r
 169         return spl::make_shared<oal_consumer>();\r
 170 }\r
 171 \r
 172 spl::shared_ptr<core::frame_consumer> create_consumer()\r
 173 {\r
 174         return spl::make_shared<oal_consumer>();\r
 175 }\r
 176 \r
 177 }}\r