2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>
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4 * This file is part of CasparCG (www.casparcg.com).
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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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19 * Author: Robert Nagy, ronag89@gmail.com
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22 #include "../../StdAfx.h"
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24 #include "frame_muxer.h"
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26 #include "../filter/filter.h"
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27 #include "../util/util.h"
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29 #include <core/producer/frame_producer.h>
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30 #include <core/frame/draw_frame.h>
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31 #include <core/frame/frame_transform.h>
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32 #include <core/frame/pixel_format.h>
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33 #include <core/frame/frame_factory.h>
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34 #include <core/frame/frame.h>
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36 #include <common/env.h>
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37 #include <common/except.h>
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38 #include <common/log.h>
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40 #if defined(_MSC_VER)
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41 #pragma warning (push)
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42 #pragma warning (disable : 4244)
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46 #define __STDC_CONSTANT_MACROS
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47 #define __STDC_LIMIT_MACROS
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48 #include <libavcodec/avcodec.h>
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49 #include <libavformat/avformat.h>
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51 #if defined(_MSC_VER)
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52 #pragma warning (pop)
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55 #include <common/assert.h>
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56 #include <boost/foreach.hpp>
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57 #include <boost/range/algorithm_ext/push_back.hpp>
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58 #include <boost/algorithm/string/predicate.hpp>
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64 using namespace caspar::core;
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66 namespace caspar { namespace ffmpeg {
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68 struct frame_muxer::impl : boost::noncopyable
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70 std::queue<std::queue<core::mutable_frame>> video_streams_;
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71 std::queue<core::audio_buffer> audio_streams_;
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72 std::queue<draw_frame> frame_buffer_;
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73 display_mode display_mode_;
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74 const double in_fps_;
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75 const video_format_desc format_desc_;
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77 std::vector<int> audio_cadence_;
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79 spl::shared_ptr<core::frame_factory> frame_factory_;
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82 const std::wstring filter_str_;
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84 impl(double in_fps, const spl::shared_ptr<core::frame_factory>& frame_factory, const core::video_format_desc& format_desc, const std::wstring& filter_str)
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85 : display_mode_(display_mode::invalid)
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87 , format_desc_(format_desc)
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88 , audio_cadence_(format_desc_.audio_cadence)
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89 , frame_factory_(frame_factory)
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90 , filter_str_(filter_str)
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92 video_streams_.push(std::queue<core::mutable_frame>());
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93 audio_streams_.push(core::audio_buffer());
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95 // Note: Uses 1 step rotated cadence for 1001 modes (1602, 1602, 1601, 1602, 1601)
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96 // This cadence fills the audio mixer most optimally.
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97 boost::range::rotate(audio_cadence_, std::end(audio_cadence_)-1);
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100 void push_video(const std::shared_ptr<AVFrame>& video_frame)
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105 if(video_frame == flush_video())
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107 video_streams_.push(std::queue<core::mutable_frame>());
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109 else if(video_frame == empty_video())
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111 auto empty_frame = frame_factory_->create_frame(this, core::pixel_format_desc(core::pixel_format::invalid));
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112 video_streams_.back().push(std::move(empty_frame));
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113 display_mode_ = display_mode::simple;
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117 if(display_mode_ == display_mode::invalid)
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118 update_display_mode(video_frame);
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120 filter_.push(video_frame);
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121 BOOST_FOREACH(auto& av_frame, filter_.poll_all())
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122 video_streams_.back().push(make_frame(this, av_frame, format_desc_.fps, *frame_factory_));
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125 if(video_streams_.back().size() > 32)
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126 BOOST_THROW_EXCEPTION(invalid_operation() << source_info("frame_muxer") << msg_info("video-stream overflow. This can be caused by incorrect frame-rate. Check clip meta-data."));
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129 void push_audio(const std::shared_ptr<core::audio_buffer>& audio)
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134 if(audio == flush_audio())
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136 audio_streams_.push(core::audio_buffer());
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138 else if(audio == empty_audio())
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140 boost::range::push_back(audio_streams_.back(), core::audio_buffer(audio_cadence_.front(), 0));
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144 boost::range::push_back(audio_streams_.back(), *audio);
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147 if(audio_streams_.back().size() > static_cast<size_t>(32*audio_cadence_.front()))
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148 BOOST_THROW_EXCEPTION(invalid_operation() << source_info("frame_muxer") << msg_info("audio-stream overflow. This can be caused by incorrect frame-rate. Check clip meta-data."));
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151 bool video_ready() const
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153 return video_streams_.size() > 1 || (video_streams_.size() >= audio_streams_.size() && video_ready2());
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156 bool audio_ready() const
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158 return audio_streams_.size() > 1 || (audio_streams_.size() >= video_streams_.size() && audio_ready2());
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161 bool video_ready2() const
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163 switch(display_mode_)
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165 case display_mode::deinterlace_bob_reinterlace:
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166 case display_mode::interlace:
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167 case display_mode::half:
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168 return video_streams_.front().size() >= 2;
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170 return video_streams_.front().size() >= 1;
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174 bool audio_ready2() const
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176 switch(display_mode_)
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178 case display_mode::duplicate:
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179 return audio_streams_.front().size()/2 >= static_cast<size_t>(audio_cadence_.front());
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181 return audio_streams_.front().size() >= static_cast<size_t>(audio_cadence_.front());
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185 bool try_pop(core::draw_frame& result)
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187 if(!frame_buffer_.empty())
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189 result = std::move(frame_buffer_.front());
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190 frame_buffer_.pop();
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194 if(video_streams_.size() > 1 && audio_streams_.size() > 1 && (!video_ready2() || !audio_ready2()))
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196 if(!video_streams_.front().empty() || !audio_streams_.front().empty())
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197 CASPAR_LOG(trace) << "Truncating: " << video_streams_.front().size() << L" video-frames, " << audio_streams_.front().size() << L" audio-samples.";
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199 video_streams_.pop();
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200 audio_streams_.pop();
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203 if(!video_ready2() || !audio_ready2() || display_mode_ == display_mode::invalid)
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206 auto frame1 = pop_video();
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207 frame1.audio_data() = pop_audio();
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209 switch(display_mode_)
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211 case display_mode::simple:
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212 case display_mode::deinterlace_bob:
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213 case display_mode::deinterlace:
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215 frame_buffer_.push(core::draw_frame(std::move(frame1)));
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218 case display_mode::interlace:
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219 case display_mode::deinterlace_bob_reinterlace:
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221 auto frame2 = pop_video();
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223 frame_buffer_.push(core::draw_frame::interlace(
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224 core::draw_frame(std::move(frame1)),
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225 core::draw_frame(std::move(frame2)),
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226 format_desc_.field_mode));
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229 case display_mode::duplicate:
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231 boost::range::push_back(frame1.audio_data(), pop_audio());
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233 auto draw_frame = core::draw_frame(std::move(frame1));
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234 frame_buffer_.push(draw_frame);
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235 frame_buffer_.push(draw_frame);
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238 case display_mode::half:
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240 pop_video(); // Throw away
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242 frame_buffer_.push(core::draw_frame(std::move(frame1)));
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246 BOOST_THROW_EXCEPTION(invalid_operation());
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249 return try_pop(result);
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252 core::mutable_frame pop_video()
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254 auto frame = std::move(video_streams_.front().front());
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255 video_streams_.front().pop();
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256 return std::move(frame);
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259 core::audio_buffer pop_audio()
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261 CASPAR_VERIFY(audio_streams_.front().size() >= static_cast<size_t>(audio_cadence_.front()));
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263 auto begin = audio_streams_.front().begin();
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264 auto end = begin + audio_cadence_.front();
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266 core::audio_buffer samples(begin, end);
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267 audio_streams_.front().erase(begin, end);
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269 boost::range::rotate(audio_cadence_, std::begin(audio_cadence_)+1);
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274 void update_display_mode(const std::shared_ptr<AVFrame>& frame)
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276 std::wstring filter_str = filter_str_;
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278 display_mode_ = display_mode::simple;
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280 auto mode = get_mode(*frame);
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281 if(mode == core::field_mode::progressive && frame->height < 720 && in_fps_ < 50.0) // SD frames are interlaced. Probably incorrect meta-data. Fix it.
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282 mode = core::field_mode::upper;
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284 auto fps = in_fps_;
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286 if(filter::is_deinterlacing(filter_str_))
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287 mode = core::field_mode::progressive;
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289 if(filter::is_double_rate(filter_str_))
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292 display_mode_ = get_display_mode(mode, fps, format_desc_.field_mode, format_desc_.fps);
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294 if((frame->height != 480 || format_desc_.height != 486) && // don't deinterlace for NTSC DV
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295 display_mode_ == display_mode::simple && mode != core::field_mode::progressive && format_desc_.field_mode != core::field_mode::progressive &&
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296 frame->height != format_desc_.height)
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298 display_mode_ = display_mode::deinterlace_bob_reinterlace; // The frame will most likely be scaled, we need to deinterlace->reinterlace
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301 if(display_mode_ == display_mode::deinterlace)
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302 filter_str = append_filter(filter_str, L"YADIF=0:-1");
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303 else if(display_mode_ == display_mode::deinterlace_bob || display_mode_ == display_mode::deinterlace_bob_reinterlace)
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304 filter_str = append_filter(filter_str, L"YADIF=1:-1");
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306 if(display_mode_ == display_mode::invalid)
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308 CASPAR_LOG(warning) << L"[frame_muxer] Auto-transcode: Failed to detect display-mode.";
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309 display_mode_ = display_mode::simple;
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312 if(!boost::iequals(filter_.filter_str(), filter_str))
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314 for(int n = 0; n < filter_.delay(); ++n)
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316 filter_.push(frame);
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317 auto av_frame = filter_.poll();
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319 video_streams_.back().push(make_frame(this, spl::make_shared_ptr(av_frame), format_desc_.fps, *frame_factory_));
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321 filter_ = filter(filter_str);
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322 CASPAR_LOG(info) << L"[frame_muxer] " << display_mode_ << L" " << print_mode(frame->width, frame->height, in_fps_, frame->interlaced_frame > 0);
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326 uint32_t calc_nb_frames(uint32_t nb_frames) const
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328 uint64_t nb_frames2 = nb_frames;
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330 if(filter_.is_double_rate()) // Take into account transformations in filter.
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333 switch(display_mode_) // Take into account transformation in run.
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335 case display_mode::deinterlace_bob_reinterlace:
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336 case display_mode::interlace:
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337 case display_mode::half:
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340 case display_mode::duplicate:
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345 return static_cast<uint32_t>(nb_frames2);
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349 frame_muxer::frame_muxer(double in_fps, const spl::shared_ptr<core::frame_factory>& frame_factory, const core::video_format_desc& format_desc, const std::wstring& filter)
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350 : impl_(new impl(in_fps, frame_factory, format_desc, filter)){}
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351 void frame_muxer::push_video(const std::shared_ptr<AVFrame>& video_frame){impl_->push_video(video_frame);}
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352 void frame_muxer::push_audio(const std::shared_ptr<core::audio_buffer>& audio_samples){return impl_->push_audio(audio_samples);}
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353 bool frame_muxer::try_pop(core::draw_frame& result){return impl_->try_pop(result);}
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354 uint32_t frame_muxer::calc_nb_frames(uint32_t nb_frames) const {return impl_->calc_nb_frames(nb_frames);}
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355 bool frame_muxer::video_ready() const{return impl_->video_ready();}
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356 bool frame_muxer::audio_ready() const{return impl_->audio_ready();}
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