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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24 #include "frame_muxer.h"
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27 #include "audio/audio_decoder.h"
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28 #include "video/video_decoder.h"
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30 #include <common/env.h>
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31 #include <common/utility/assert.h>
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32 #include <common/diagnostics/graph.h>
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34 #include <core/video_format.h>
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35 #include <core/producer/frame_producer.h>
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36 #include <core/producer/frame/frame_factory.h>
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37 #include <core/producer/frame/basic_frame.h>
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39 #include <boost/assign.hpp>
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40 #include <boost/timer.hpp>
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41 #include <boost/foreach.hpp>
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42 #include <boost/filesystem.hpp>
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43 #include <boost/range/algorithm/find_if.hpp>
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44 #include <boost/range/algorithm/find.hpp>
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46 #include <tbb/parallel_invoke.h>
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50 double validate_fps(double fps, int64_t nb_frames, double duration_sec)
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52 if(fps > 20.0 && fps < 80.0)
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55 auto est_fps = nb_frames/duration_sec;
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57 CASPAR_LOG(warning) << L"Invalid framerate detected, trying to estimate, fps: " << fps << L" nb_frames: " << nb_frames << L" duration_sec: " << duration_sec << L" => " << est_fps << L" fps.";
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62 struct ffmpeg_producer : public core::frame_producer
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64 const std::wstring filename_;
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66 const safe_ptr<diagnostics::graph> graph_;
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67 boost::timer frame_timer_;
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68 boost::timer video_timer_;
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69 boost::timer audio_timer_;
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71 const safe_ptr<core::frame_factory> frame_factory_;
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72 const core::video_format_desc format_desc_;
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75 video_decoder video_decoder_;
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76 audio_decoder audio_decoder_;
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83 const int64_t length_;
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85 safe_ptr<core::basic_frame> last_frame_;
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87 const size_t width_;
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88 const size_t height_;
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89 bool is_progressive_;
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92 explicit ffmpeg_producer(const safe_ptr<core::frame_factory>& frame_factory, const std::wstring& filename, const std::wstring& filter, bool loop, int start, int length)
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93 : filename_(filename)
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94 , graph_(diagnostics::create_graph([this]{return print();}))
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95 , frame_factory_(frame_factory)
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96 , format_desc_(frame_factory->get_video_format_desc())
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97 , input_(graph_, filename_, loop, start, length)
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98 , video_decoder_(input_.context(), frame_factory, filter)
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99 , audio_decoder_(input_.context(), frame_factory->get_video_format_desc())
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100 , fps_(validate_fps(video_decoder_.fps(), video_decoder_.nb_frames(), audio_decoder_.duration()))
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101 , muxer_(fps_, frame_factory)
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106 , last_frame_(core::basic_frame::empty())
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107 , width_(video_decoder_.width())
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108 , height_(video_decoder_.height())
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109 , is_progressive_(true)
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111 graph_->add_guide("frame-time", 0.5);
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112 graph_->set_color("frame-time", diagnostics::color(0.1f, 1.0f, 0.1f));
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113 graph_->set_color("underflow", diagnostics::color(0.6f, 0.3f, 0.9f));
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115 for(int n = 0; n < 32 && muxer_.empty(); ++n)
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119 virtual safe_ptr<core::basic_frame> receive(int hints)
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121 auto frame = core::basic_frame::late();
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123 frame_timer_.restart();
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125 for(int n = 0; n < 64 && muxer_.empty(); ++n)
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126 decode_frame(hints);
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128 graph_->update_value("frame-time", static_cast<float>(frame_timer_.elapsed()*format_desc_.fps*0.5));
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130 if(!muxer_.empty())
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131 frame = last_frame_ = muxer_.pop();
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135 return core::basic_frame::eof();
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138 graph_->add_tag("underflow");
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146 virtual safe_ptr<core::basic_frame> last_frame() const
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148 return disable_audio(last_frame_);
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151 void decode_frame(int hints)
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153 for(int n = 0; n < 16 && ((!muxer_.video_ready() && !video_decoder_.ready()) || (!muxer_.audio_ready() && !audio_decoder_.ready())); ++n)
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155 std::shared_ptr<AVPacket> pkt;
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156 if(input_.try_pop(pkt))
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158 video_decoder_.push(pkt);
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159 audio_decoder_.push(pkt);
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163 tbb::parallel_invoke(
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166 if(muxer_.video_ready())
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169 auto video_frames = video_decoder_.poll();
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170 BOOST_FOREACH(auto& video, video_frames)
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172 is_progressive_ = video ? video->interlaced_frame == 0 : is_progressive_;
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173 muxer_.push(video, hints);
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178 if(muxer_.audio_ready())
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181 auto audio_samples = audio_decoder_.poll();
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182 BOOST_FOREACH(auto& audio, audio_samples)
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183 muxer_.push(audio);
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189 virtual int64_t nb_frames() const
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192 return std::numeric_limits<int64_t>::max();
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194 // This function estimates nb_frames until input has read all packets for one loop, at which point the count should be accurate.
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196 int64_t nb_frames = input_.nb_frames();
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197 if(input_.nb_loops() < 1) // input still hasn't counted all frames
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199 int64_t video_nb_frames = video_decoder_.nb_frames();
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200 int64_t audio_nb_frames = audio_decoder_.nb_frames();
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202 nb_frames = std::min(length_, std::max(nb_frames, std::max(video_nb_frames, audio_nb_frames)));
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205 nb_frames = muxer_.calc_nb_frames(nb_frames);
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207 // TODO: Might need to scale nb_frames av frame_muxer transformations.
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209 return nb_frames + late_frames_ - start_;
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212 virtual std::wstring print() const
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214 return L"ffmpeg[" + boost::filesystem::wpath(filename_).filename() + L"|"
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215 + boost::lexical_cast<std::wstring>(fps_) + (is_progressive_ ? L"p" : L"i") +L"|"
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216 + boost::lexical_cast<std::wstring>(width_) + L"x" + boost::lexical_cast<std::wstring>(height_) + L"]";
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220 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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222 static const std::vector<std::wstring> extensions = boost::assign::list_of
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223 (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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224 std::wstring filename = env::media_folder() + L"\\" + params[0];
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226 auto ext = boost::find_if(extensions, [&](const std::wstring& ex)
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228 return boost::filesystem::is_regular_file(boost::filesystem::wpath(filename + L"." + ex));
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231 if(ext == extensions.end())
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232 return core::frame_producer::empty();
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234 std::wstring path = filename + L"." + *ext;
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235 bool loop = boost::find(params, L"LOOP") != params.end();
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238 size_t length = std::numeric_limits<size_t>::max();
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240 auto seek_it = boost::find(params, L"SEEK");
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241 if(seek_it != params.end())
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243 if(++seek_it != params.end())
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244 start = boost::lexical_cast<size_t>(*seek_it);
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247 auto length_it = boost::find(params, L"LENGTH");
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248 if(length_it != params.end())
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250 if(++length_it != params.end())
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251 length = boost::lexical_cast<size_t>(*length_it);
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254 std::wstring filter = L"";
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255 auto filter_it = boost::find(params, L"FILTER");
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256 if(filter_it != params.end())
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258 if(++filter_it != params.end())
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259 filter = *filter_it;
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262 return make_safe<ffmpeg_producer>(frame_factory, path, filter, loop, start, length);
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