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/executor.h>\r
  26 #include <common/diagnostics/graph.h>\r
  27 #include <common/log.h>\r
  28 #include <common/utf.h>\r
  29 #include <common/env.h>\r
  30 \r
  31 #include <core/consumer/frame_consumer.h>\r
  32 #include <core/frame/frame.h>\r
  33 #include <core/mixer/audio/audio_util.h>\r
  34 #include <core/mixer/audio/audio_mixer.h>\r
  35 #include <core/video_format.h>\r
  36 \r
  37 #include <boost/circular_buffer.hpp>\r
  38 #include <boost/lexical_cast.hpp>\r
  39 #include <boost/property_tree/ptree.hpp>\r
  40 #include <boost/timer.hpp>\r
  41 #include <boost/foreach.hpp>\r
  42 #include <boost/thread/once.hpp>\r
  43 \r
  44 #include <tbb/concurrent_queue.h>\r
  45 \r
  46 #include <al/alc.h>\r
  47 #include <al/al.h>\r
  48 \r
  49 #include <array>\r
  50 \r
  51 namespace caspar { namespace oal {\r
  52 \r
  53 typedef std::vector<int16_t, tbb::cache_aligned_allocator<int16_t>> audio_buffer_16;\r
  54 \r
  55 class device\r
  56 {\r
  57         ALCdevice*                                                                                      device_;\r
  58         ALCcontext*                                                                                     context_;\r
  59 \r
  60 public:\r
  61         device()\r
  62                 : device_(0)\r
  63                 , context_(0)\r
  64         {\r
  65                 device_ = alcOpenDevice(nullptr);\r
  66 \r
  67                 if(!device_)\r
  68                         CASPAR_THROW_EXCEPTION(invalid_operation() << msg_info("Failed to initialize audio device."));\r
  69 \r
  70                 context_ = alcCreateContext(device_, nullptr);\r
  71 \r
  72                 if(!context_)\r
  73                         CASPAR_THROW_EXCEPTION(invalid_operation() << msg_info("Failed to create audio context."));\r
  74                         \r
  75                 if(alcMakeContextCurrent(context_) == ALC_FALSE)\r
  76                         CASPAR_THROW_EXCEPTION(invalid_operation() << msg_info("Failed to activate audio context."));\r
  77         }\r
  78 \r
  79         ~device()\r
  80         {\r
  81                 alcMakeContextCurrent(nullptr);\r
  82 \r
  83                 if(context_)\r
  84                         alcDestroyContext(context_);\r
  85 \r
  86                 if(device_)\r
  87                         alcCloseDevice(device_);\r
  88         }\r
  89 \r
  90         ALCdevice* get()\r
  91         {\r
  92                 return device_;\r
  93         }\r
  94 };\r
  95 \r
  96 void init_device()\r
  97 {\r
  98         static std::unique_ptr<device> instance;\r
  99         static boost::once_flag f = BOOST_ONCE_INIT;\r
 100         \r
 101         boost::call_once(f, []{instance.reset(new device());});\r
 102 }\r
 103 \r
 104 struct oal_consumer : public core::frame_consumer\r
 105 {\r
 106         spl::shared_ptr<diagnostics::graph>                                     graph_;\r
 107         boost::timer                                                                            perf_timer_;\r
 108         int                                                                                                     channel_index_;\r
 109         \r
 110         core::video_format_desc                                                         format_desc_;\r
 111 \r
 112         ALuint                                                                                          source_;\r
 113         std::array<ALuint, 3>                                                           buffers_;\r
 114 \r
 115         executor                                                                                        executor_;\r
 116 \r
 117 public:\r
 118         oal_consumer() \r
 119                 : channel_index_(-1)\r
 120                 , source_(0)\r
 121                 , executor_(L"oal_consumer")\r
 122         {\r
 123                 buffers_.assign(0);\r
 124 \r
 125                 init_device();\r
 126 \r
 127                 graph_->set_color("tick-time", diagnostics::color(0.0f, 0.6f, 0.9f));   \r
 128                 graph_->set_color("dropped-frame", diagnostics::color(0.3f, 0.6f, 0.3f));\r
 129                 graph_->set_color("late-frame", diagnostics::color(0.6f, 0.3f, 0.3f));\r
 130                 diagnostics::register_graph(graph_);\r
 131         }\r
 132 \r
 133         ~oal_consumer()\r
 134         {\r
 135                 executor_.begin_invoke([=]\r
 136                 {               \r
 137                         if(source_)\r
 138                         {\r
 139                                 alSourceStop(source_);\r
 140                                 alDeleteSources(1, &source_);\r
 141                         }\r
 142 \r
 143                         BOOST_FOREACH(auto& buffer, buffers_)\r
 144                         {\r
 145                                 if(buffer)\r
 146                                         alDeleteBuffers(1, &buffer);\r
 147                         };\r
 148                 });\r
 149         }\r
 150 \r
 151         // frame consumer\r
 152 \r
 153         void initialize(const core::video_format_desc& format_desc, int channel_index) override\r
 154         {\r
 155                 format_desc_    = format_desc;          \r
 156                 channel_index_  = channel_index;\r
 157                 graph_->set_text(print());\r
 158                 \r
 159                 executor_.begin_invoke([=]\r
 160                 {               \r
 161                         alGenBuffers(static_cast<ALsizei>(buffers_.size()), buffers_.data());\r
 162                         alGenSources(1, &source_);\r
 163 \r
 164                         for(std::size_t n = 0; n < buffers_.size(); ++n)\r
 165                         {\r
 166                                 std::vector<int16_t> audio(format_desc_.audio_cadence[n % format_desc_.audio_cadence.size()], 0);\r
 167                                 alBufferData(buffers_[n], AL_FORMAT_STEREO16, audio.data(), static_cast<ALsizei>(audio.size()*sizeof(int16_t)), format_desc_.audio_sample_rate);\r
 168                                 alSourceQueueBuffers(source_, 1, &buffers_[n]);\r
 169                         }\r
 170                         \r
 171                         alSourcei(source_, AL_LOOPING, AL_FALSE);\r
 172 \r
 173                         alSourcePlay(source_);  \r
 174                 });\r
 175         }\r
 176         \r
 177         bool send(core::const_frame frame) override\r
 178         {                       \r
 179                 executor_.begin_invoke([=]\r
 180                 {\r
 181                         ALenum state; \r
 182                         alGetSourcei(source_, AL_SOURCE_STATE,&state);\r
 183                         if(state != AL_PLAYING)\r
 184                         {\r
 185                                 for(int n = 0; n < buffers_.size()-1; ++n)\r
 186                                 {                                       \r
 187                                         ALuint buffer = 0;  \r
 188                                         alSourceUnqueueBuffers(source_, 1, &buffer);\r
 189                                         if(buffer)\r
 190                                         {\r
 191                                                 std::vector<int16_t> audio(format_desc_.audio_cadence[n % format_desc_.audio_cadence.size()], 0);\r
 192                                                 alBufferData(buffer, AL_FORMAT_STEREO16, audio.data(), static_cast<ALsizei>(audio.size()*sizeof(int16_t)), format_desc_.audio_sample_rate);\r
 193                                                 alSourceQueueBuffers(source_, 1, &buffer);\r
 194                                         }\r
 195                                 }\r
 196                                 alSourcePlay(source_);          \r
 197                                 graph_->set_tag("late-frame");  \r
 198                         }\r
 199 \r
 200                         auto audio = core::audio_32_to_16(frame.audio_data());\r
 201                         \r
 202                         ALuint buffer = 0;  \r
 203                         alSourceUnqueueBuffers(source_, 1, &buffer);\r
 204                         if(buffer)\r
 205                         {\r
 206                                 alBufferData(buffer, AL_FORMAT_STEREO16, audio.data(), static_cast<ALsizei>(audio.size()*sizeof(int16_t)), format_desc_.audio_sample_rate);\r
 207                                 alSourceQueueBuffers(source_, 1, &buffer);\r
 208                         }\r
 209                         else\r
 210                                 graph_->set_tag("dropped-frame");\r
 211 \r
 212                         graph_->set_value("tick-time", perf_timer_.elapsed()*format_desc_.fps*0.5);             \r
 213                         perf_timer_.restart();\r
 214                 });\r
 215 \r
 216                 return true;\r
 217         }\r
 218         \r
 219         std::wstring print() const override\r
 220         {\r
 221                 return L"oal[" + boost::lexical_cast<std::wstring>(channel_index_) + L"|" + format_desc_.name + L"]";\r
 222         }\r
 223 \r
 224         std::wstring name() const override\r
 225         {\r
 226                 return L"system-audio";\r
 227         }\r
 228 \r
 229         boost::property_tree::wptree info() const override\r
 230         {\r
 231                 boost::property_tree::wptree info;\r
 232                 info.add(L"type", L"system-audio");\r
 233                 return info;\r
 234         }\r
 235         \r
 236         bool has_synchronization_clock() const override\r
 237         {\r
 238                 return false;\r
 239         }\r
 240         \r
 241         int buffer_depth() const override\r
 242         {\r
 243                 return 3;\r
 244         }\r
 245                 \r
 246         int index() const override\r
 247         {\r
 248                 return 500;\r
 249         }\r
 250 \r
 251         void subscribe(const monitor::observable::observer_ptr& o) override\r
 252         {\r
 253         }\r
 254 \r
 255         void unsubscribe(const monitor::observable::observer_ptr& o) override\r
 256         {\r
 257         }       \r
 258 };\r
 259 \r
 260 spl::shared_ptr<core::frame_consumer> create_consumer(const std::vector<std::wstring>& params)\r
 261 {\r
 262         if(params.size() < 1 || params[0] != L"AUDIO")\r
 263                 return core::frame_consumer::empty();\r
 264 \r
 265         return spl::make_shared<oal_consumer>();\r
 266 }\r
 267 \r
 268 spl::shared_ptr<core::frame_consumer> create_consumer()\r
 269 {\r
 270         return spl::make_shared<oal_consumer>();\r
 271 }\r
 272 \r
 273 }}\r