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/assert.h>
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29 #include <common/utility/timer.h>
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30 #include <common/diagnostics/graph.h>
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32 #include <core/producer/frame/basic_frame.h>
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33 #include <core/mixer/write_frame.h>
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34 #include <core/producer/frame/audio_transform.h>
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35 #include <core/video_format.h>
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37 #include <common/env.h>
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39 #include <tbb/parallel_invoke.h>
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41 #include <boost/timer.hpp>
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42 #include <boost/range/algorithm.hpp>
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43 #include <boost/range/algorithm_ext.hpp>
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49 struct ffmpeg_producer : public core::frame_producer
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51 const std::wstring filename_;
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53 const safe_ptr<diagnostics::graph> graph_;
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54 boost::timer frame_timer_;
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56 const safe_ptr<core::frame_factory> frame_factory_;
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59 std::unique_ptr<video_decoder> video_decoder_;
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60 std::unique_ptr<audio_decoder> audio_decoder_;
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62 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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63 : filename_(filename)
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64 , graph_(diagnostics::create_graph(narrow(print())))
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65 , frame_factory_(frame_factory)
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66 , input_(safe_ptr<diagnostics::graph>(graph_), filename_, loop, start, length)
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68 graph_->add_guide("frame-time", 0.5);
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69 graph_->set_color("frame-time", diagnostics::color(1.0f, 0.0f, 0.0f));
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70 graph_->set_color("underflow", diagnostics::color(0.6f, 0.3f, 0.9f));
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72 double frame_time = 1.0f/input_.fps();
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73 double format_frame_time = 1.0/frame_factory->get_video_format_desc().fps;
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74 if(abs(frame_time - format_frame_time) > 0.0001 && abs(frame_time - format_frame_time/2) > 0.0001)
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75 CASPAR_LOG(warning) << print() << L" Invalid framerate detected. This may cause distorted audio during playback. frame-time: " << frame_time;
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77 video_decoder_.reset(input_.get_video_codec_context() ?
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78 new video_decoder(*input_.get_video_codec_context(), frame_factory) : nullptr);
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80 audio_decoder_.reset(input_.get_audio_codec_context() ?
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81 new audio_decoder(*input_.get_audio_codec_context(), frame_factory->get_video_format_desc()) : nullptr);
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84 decode_next_packets();
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87 virtual safe_ptr<core::basic_frame> receive()
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89 frame_timer_.restart();
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91 auto result = decode_frame();
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93 graph_->update_value("frame-time", static_cast<float>(frame_timer_.elapsed()*frame_factory_->get_video_format_desc().fps*0.5));
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98 virtual std::wstring print() const
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100 return L"ffmpeg[" + boost::filesystem::wpath(filename_).filename() + L"]";
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103 void decode_next_packets()
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105 tbb::parallel_invoke
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109 if(!video_decoder_)
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112 std::shared_ptr<AVPacket> pkt;
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113 for(int n = 0; n < 16 && video_decoder_->empty() && input_.try_pop_video_packet(pkt); ++n)
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114 video_decoder_->push(pkt);
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118 if(!audio_decoder_)
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121 std::shared_ptr<AVPacket> pkt;
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122 for(int n = 0; n < 16 && audio_decoder_->empty() && input_.try_pop_audio_packet(pkt); ++n)
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123 audio_decoder_->push(pkt);
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127 // Sync up audio with video on start. Last frame sometimes have more samples than required. Remove those.
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128 if(audio_decoder_ && video_decoder_ && video_decoder_->frame_number() == 0)
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130 std::shared_ptr<AVPacket> pkt;
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131 while(audio_decoder_->frame_number() > 0 && input_.try_pop_audio_packet(pkt))
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133 audio_decoder_->push(pkt);
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134 if(audio_decoder_->frame_number() > 0)
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135 audio_decoder_->pop();
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138 for(int n = 0; n < 16 && audio_decoder_->empty() && input_.try_pop_audio_packet(pkt); ++n)
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139 audio_decoder_->push(pkt);
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143 safe_ptr<core::basic_frame> decode_frame()
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145 decode_next_packets();
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147 if(video_decoder_ && !video_decoder_->empty() && audio_decoder_ && !audio_decoder_->empty())
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149 auto frame = std::move(video_decoder_->front());
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150 video_decoder_->pop();
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152 frame->audio_data() = std::move(audio_decoder_->front());
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153 audio_decoder_->pop();
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157 else if(video_decoder_ && !video_decoder_->empty() && !audio_decoder_)
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159 auto frame = std::move(video_decoder_->front());
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160 video_decoder_->pop();
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161 frame->get_audio_transform().set_has_audio(false);
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165 else if(audio_decoder_ && !audio_decoder_->empty() && !video_decoder_)
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167 auto frame = frame_factory_->create_frame(this, 1, 1);
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168 std::fill(frame->image_data().begin(), frame->image_data().end(), 0);
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170 frame->audio_data() = std::move(audio_decoder_->front());
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171 audio_decoder_->pop();
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175 else if(!input_.is_running() || (!video_decoder_ && !audio_decoder_))
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177 return core::basic_frame::eof();
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181 graph_->add_tag("underflow");
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182 return core::basic_frame::late();
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187 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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189 static const std::vector<std::wstring> extensions = boost::assign::list_of
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190 (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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191 std::wstring filename = env::media_folder() + L"\\" + params[0];
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193 auto ext = boost::find_if(extensions, [&](const std::wstring& ex)
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195 return boost::filesystem::is_regular_file(boost::filesystem::wpath(filename).replace_extension(ex));
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198 if(ext == extensions.end())
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199 return core::frame_producer::empty();
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201 std::wstring path = filename + L"." + *ext;
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202 bool loop = boost::find(params, L"LOOP") != params.end();
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204 static const boost::wregex expr(L"\\((?<START>\\d+)(,(?<LENGTH>\\d+)?)?\\)");//(,(?<END>\\d+))?\\]"); // boost::regex has no repeated captures?
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205 boost::wsmatch what;
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206 auto it = std::find_if(params.begin(), params.end(), [&](const std::wstring& str)
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208 return boost::regex_match(str, what, expr);
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214 if(it != params.end())
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216 start = lexical_cast_or_default(what["START"].str(), -1);
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217 if(what["LENGTH"].matched)
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218 length = lexical_cast_or_default(what["LENGTH"].str(), -1);
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221 return make_safe<ffmpeg_producer>(frame_factory, path, loop, start, length);
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