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