2 * copyright (c) 2010 Sveriges Television AB <info@casparcg.com>
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4 * This file is part of CasparCG.
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6 * CasparCG is free software: you can redistribute it and/or modify
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7 * it under the terms of the GNU General Public License as published by
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8 * the Free Software Foundation, either version 3 of the License, or
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9 * (at your option) any later version.
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11 * CasparCG is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 * GNU General Public License for more details.
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16 * You should have received a copy of the GNU General Public License
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17 * along with CasparCG. If not, see <http://www.gnu.org/licenses/>.
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20 #include "../stdafx.h"
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22 #include "ffmpeg_producer.h"
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25 #include "audio/audio_decoder.h"
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26 #include "video/video_decoder.h"
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28 #include <common/utility/timer.h>
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29 #include <common/diagnostics/graph.h>
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31 #include <core/producer/frame/basic_frame.h>
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32 #include <core/mixer/write_frame.h>
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33 #include <core/producer/frame/audio_transform.h>
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34 #include <core/video_format.h>
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36 #include <common/env.h>
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38 #include <tbb/parallel_invoke.h>
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40 #include <boost/timer.hpp>
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41 #include <boost/range/algorithm.hpp>
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42 #include <boost/range/algorithm_ext.hpp>
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48 struct ffmpeg_producer : public core::frame_producer
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50 static const size_t DECODED_PACKET_BUFFER_SIZE = 4;
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51 static const size_t MAX_PACKET_OFFSET = 64; // Avoid infinite looping.
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53 const std::wstring filename_;
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56 const safe_ptr<diagnostics::graph> graph_;
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57 boost::timer frame_timer_;
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59 std::deque<safe_ptr<core::write_frame>> video_frame_buffer_;
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60 std::deque<std::vector<short>> audio_chunk_buffer_;
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62 const safe_ptr<core::frame_factory> frame_factory_;
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65 std::unique_ptr<video_decoder> video_decoder_;
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66 std::unique_ptr<audio_decoder> audio_decoder_;
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68 explicit ffmpeg_producer(const safe_ptr<core::frame_factory>& frame_factory, const std::wstring& filename, bool loop, int start, int length)
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69 : filename_(filename)
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71 , graph_(diagnostics::create_graph(narrow(print())))
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72 , frame_factory_(frame_factory)
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73 , input_(safe_ptr<diagnostics::graph>(graph_), filename_, loop_, start)
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75 graph_->add_guide("frame-time", 0.5);
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76 graph_->set_color("frame-time", diagnostics::color(1.0f, 0.0f, 0.0f));
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77 graph_->set_color("underflow", diagnostics::color(0.6f, 0.3f, 0.9f));
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79 double frame_time = 1.0f/input_.fps();
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80 double format_frame_time = 1.0/frame_factory->get_video_format_desc().fps;
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81 if(abs(frame_time - format_frame_time) > 0.0001 && abs(frame_time - format_frame_time/2) > 0.0001)
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82 CASPAR_LOG(warning) << print() << L" Invalid framerate detected. This may cause distorted audio during playback. frame-time: " << frame_time;
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86 video_decoder_.reset(input_.get_video_codec_context() ?
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87 new video_decoder(*input_.get_video_codec_context(), frame_factory) : nullptr);
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91 CASPAR_LOG_CURRENT_EXCEPTION();
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92 CASPAR_LOG(warning) << print() << " failed to initialize video-decoder.";
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97 audio_decoder_.reset(input_.get_audio_codec_context() ?
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98 new audio_decoder(*input_.get_audio_codec_context(), frame_factory->get_video_format_desc()) : nullptr);
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102 CASPAR_LOG_CURRENT_EXCEPTION();
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103 CASPAR_LOG(warning) << print() << " failed to initialize audio-decoder.";
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106 if(!video_decoder_ && !audio_decoder_)
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108 BOOST_THROW_EXCEPTION(
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109 caspar_exception() <<
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110 source_info(narrow(print())) <<
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111 msg_info("Failed to initialize any decoder"));
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115 virtual safe_ptr<core::basic_frame> receive()
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117 frame_timer_.restart();
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119 std::shared_ptr<core::basic_frame> frame;
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120 for(size_t n = 0; !frame && input_.has_packet() && n < MAX_PACKET_OFFSET ; ++n)
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121 frame = try_decode_frame();
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123 graph_->update_value("frame-time", static_cast<float>(frame_timer_.elapsed()*frame_factory_->get_video_format_desc().fps*0.5));
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126 return make_safe(frame);
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128 if(!input_.is_running())
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129 return core::basic_frame::eof();
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131 if(!video_decoder_ && !audio_decoder_)
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132 return core::basic_frame::eof();
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134 graph_->add_tag("underflow");
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135 return core::basic_frame::late();
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138 virtual std::wstring print() const
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140 return L"ffmpeg[" + boost::filesystem::wpath(filename_).filename() + L"]";
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143 std::shared_ptr<core::basic_frame> try_decode_frame()
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145 tbb::parallel_invoke
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149 if(video_frame_buffer_.size() < DECODED_PACKET_BUFFER_SIZE)
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150 try_decode_video_packet(input_.get_video_packet());
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154 if(audio_chunk_buffer_.size() < DECODED_PACKET_BUFFER_SIZE)
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155 try_decode_audio_packet(input_.get_audio_packet());
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159 return try_merge_audio_and_video();
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162 void try_decode_video_packet(std::shared_ptr<AVPacket>&& video_packet)
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164 if(!video_decoder_)
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169 boost::range::push_back(video_frame_buffer_, video_decoder_->execute(std::move(video_packet)));
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173 CASPAR_LOG_CURRENT_EXCEPTION();
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174 video_decoder_.reset();
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175 CASPAR_LOG(warning) << print() << " removed video-stream.";
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179 void try_decode_audio_packet(std::shared_ptr<AVPacket>&& audio_packet)
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181 if(!audio_decoder_)
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186 boost::range::push_back(audio_chunk_buffer_, audio_decoder_->execute(std::move(audio_packet)));
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190 CASPAR_LOG_CURRENT_EXCEPTION();
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191 audio_decoder_.reset();
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192 CASPAR_LOG(warning) << print() << " removed audio-stream.";
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196 std::shared_ptr<core::basic_frame> try_merge_audio_and_video()
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198 std::shared_ptr<core::write_frame> frame;
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200 if(!video_frame_buffer_.empty() && !audio_chunk_buffer_.empty())
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202 frame = video_frame_buffer_.front();
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203 video_frame_buffer_.pop_front();
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205 frame->audio_data() = std::move(audio_chunk_buffer_.front());
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206 audio_chunk_buffer_.pop_front();
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208 else if(!video_frame_buffer_.empty() && !audio_decoder_)
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210 frame = std::move(video_frame_buffer_.front());
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211 video_frame_buffer_.pop_front();
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212 frame->get_audio_transform().set_has_audio(false);
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214 else if(!audio_chunk_buffer_.empty() && !video_decoder_)
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216 frame = frame_factory_->create_frame(this, 1, 1);
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217 std::fill(frame->image_data().begin(), frame->image_data().end(), 0);
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219 frame->audio_data() = std::move(audio_chunk_buffer_.front());
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220 audio_chunk_buffer_.pop_front();
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227 safe_ptr<core::frame_producer> create_ffmpeg_producer(const safe_ptr<core::frame_factory>& frame_factory, const std::vector<std::wstring>& params)
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229 static const std::vector<std::wstring> extensions = boost::assign::list_of
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230 (L"mpg")(L"mpeg")(L"avi")(L"mov")(L"qt")(L"webm")(L"dv")(L"mp4")(L"f4v")(L"flv")(L"mkv")(L"mka")(L"wmv")(L"wma")(L"ogg")(L"divx")(L"xvid")(L"wav")(L"mp3")(L"m2v");
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231 std::wstring filename = env::media_folder() + L"\\" + params[0];
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233 auto ext = boost::find_if(extensions, [&](const std::wstring& ex)
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235 return boost::filesystem::is_regular_file(boost::filesystem::wpath(filename).replace_extension(ex));
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238 if(ext == extensions.end())
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239 return core::frame_producer::empty();
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241 std::wstring path = filename + L"." + *ext;
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242 bool loop = boost::find(params, L"LOOP") != params.end();
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244 static const boost::wregex expr(L"\\((?<START>\\d+)(,(?<LENGTH>\\d+)?)?\\)");//(,(?<END>\\d+))?\\]"); // boost::regex has no repeated captures?
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245 boost::wsmatch what;
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246 auto it = std::find_if(params.begin(), params.end(), [&](const std::wstring& str)
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248 return boost::regex_match(str, what, expr);
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254 if(it != params.end())
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256 start = lexical_cast_or_default(what["START"].str(), -1);
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257 if(what["LENGTH"].matched)
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258 length = lexical_cast_or_default(what["LENGTH"].str(), -1);
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261 return make_safe<ffmpeg_producer>(frame_factory, path, loop, start, length);
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