2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>
4 * This file is part of CasparCG (www.casparcg.com).
6 * CasparCG is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * CasparCG is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with CasparCG. If not, see <http://www.gnu.org/licenses/>.
19 * Author: Robert Nagy, ronag89@gmail.com
22 #include "../../StdAfx.h"
24 #include "frame_muxer.h"
26 #include "../filter/filter.h"
27 #include "../util/util.h"
29 #include <core/producer/frame_producer.h>
30 #include <core/frame/draw_frame.h>
31 #include <core/frame/frame_transform.h>
32 #include <core/frame/pixel_format.h>
33 #include <core/frame/frame_factory.h>
34 #include <core/frame/frame.h>
36 #include <common/env.h>
37 #include <common/except.h>
38 #include <common/log.h>
41 #pragma warning (push)
42 #pragma warning (disable : 4244)
46 #define __STDC_CONSTANT_MACROS
47 #define __STDC_LIMIT_MACROS
48 #include <libavcodec/avcodec.h>
49 #include <libavformat/avformat.h>
55 #include <common/assert.h>
56 #include <boost/foreach.hpp>
57 #include <boost/range/algorithm_ext/push_back.hpp>
58 #include <boost/algorithm/string/predicate.hpp>
64 using namespace caspar::core;
66 namespace caspar { namespace ffmpeg {
68 struct frame_muxer::impl : boost::noncopyable
70 std::queue<core::mutable_frame> video_stream_;
71 core::audio_buffer audio_stream_;
72 std::queue<draw_frame> frame_buffer_;
73 display_mode display_mode_;
75 const video_format_desc format_desc_;
77 std::vector<int> audio_cadence_;
79 spl::shared_ptr<core::frame_factory> frame_factory_;
82 const std::wstring filter_str_;
83 bool force_deinterlacing_;
85 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)
86 : display_mode_(display_mode::invalid)
88 , format_desc_(format_desc)
89 , audio_cadence_(format_desc_.audio_cadence)
90 , frame_factory_(frame_factory)
91 , filter_str_(filter_str)
92 , force_deinterlacing_(env::properties().get(L"configuration.force-deinterlace", true))
94 // Note: Uses 1 step rotated cadence for 1001 modes (1602, 1602, 1601, 1602, 1601)
95 // This cadence fills the audio mixer most optimally.
96 boost::range::rotate(audio_cadence_, std::end(audio_cadence_)-1);
99 void push_video(const std::shared_ptr<AVFrame>& video)
106 auto empty_frame = frame_factory_->create_frame(this, core::pixel_format_desc(core::pixel_format::invalid));
107 video_stream_.push(std::move(empty_frame));
108 display_mode_ = display_mode::simple;
112 if(display_mode_ == display_mode::invalid)
113 update_display_mode(video);
116 BOOST_FOREACH(auto& av_frame, filter_.poll_all())
117 video_stream_.push(make_frame(this, av_frame, format_desc_.fps, *frame_factory_));
123 void push_audio(const std::shared_ptr<AVFrame>& audio)
130 boost::range::push_back(audio_stream_, core::audio_buffer(audio_cadence_.front() * format_desc_.audio_channels, 0));
134 auto ptr = reinterpret_cast<int32_t*>(audio->data[0]);
135 audio_stream_.insert(audio_stream_.end(), ptr, ptr + audio->linesize[0]/sizeof(int32_t));
141 bool video_ready() const
143 switch(display_mode_)
145 case display_mode::deinterlace_bob_reinterlace:
146 case display_mode::interlace:
147 case display_mode::half:
148 return video_stream_.size() >= 2;
150 return video_stream_.size() >= 1;
154 bool audio_ready() const
156 switch(display_mode_)
158 case display_mode::duplicate:
159 return audio_stream_.size() >= static_cast<size_t>(audio_cadence_[0] + audio_cadence_[1 % audio_cadence_.size()])*format_desc_.audio_channels;
161 return audio_stream_.size() >= static_cast<size_t>(audio_cadence_.front()) * format_desc_.audio_channels;
167 return frame_buffer_.empty();
170 core::draw_frame front() const
172 return frame_buffer_.front();
182 while(video_ready() && audio_ready() && display_mode_ != display_mode::invalid)
184 auto frame1 = pop_video();
185 frame1.audio_data() = pop_audio();
187 switch(display_mode_)
189 case display_mode::simple:
190 case display_mode::deinterlace_bob:
191 case display_mode::deinterlace:
193 frame_buffer_.push(core::draw_frame(std::move(frame1)));
196 case display_mode::interlace:
197 case display_mode::deinterlace_bob_reinterlace:
199 auto frame2 = pop_video();
201 frame_buffer_.push(core::draw_frame::interlace(
202 core::draw_frame(std::move(frame1)),
203 core::draw_frame(std::move(frame2)),
204 format_desc_.field_mode));
207 case display_mode::duplicate:
209 boost::range::push_back(frame1.audio_data(), pop_audio());
211 auto draw_frame = core::draw_frame(std::move(frame1));
212 frame_buffer_.push(draw_frame);
213 frame_buffer_.push(draw_frame);
216 case display_mode::half:
218 pop_video(); // Throw away
220 frame_buffer_.push(core::draw_frame(std::move(frame1)));
224 CASPAR_THROW_EXCEPTION(invalid_operation());
229 core::mutable_frame pop_video()
231 auto frame = std::move(video_stream_.front());
233 return std::move(frame);
236 core::audio_buffer pop_audio()
238 if(audio_stream_.size() < audio_cadence_.front() * format_desc_.audio_channels)
239 CASPAR_THROW_EXCEPTION(out_of_range());
241 auto begin = audio_stream_.begin();
242 auto end = begin + audio_cadence_.front() * format_desc_.audio_channels;
244 core::audio_buffer samples(begin, end);
245 audio_stream_.erase(begin, end);
247 boost::range::rotate(audio_cadence_, std::begin(audio_cadence_)+1);
252 void update_display_mode(const std::shared_ptr<AVFrame>& frame)
254 std::wstring filter_str = filter_str_;
256 display_mode_ = display_mode::simple;
258 auto mode = get_mode(*frame);
259 if(mode == core::field_mode::progressive && frame->height < 720 && in_fps_ < 50.0) // SD frames are interlaced. Probably incorrect meta-data. Fix it.
260 mode = core::field_mode::upper;
264 if(filter::is_deinterlacing(filter_str_))
265 mode = core::field_mode::progressive;
267 if(filter::is_double_rate(filter_str_))
270 display_mode_ = get_display_mode(mode, fps, format_desc_.field_mode, format_desc_.fps);
272 if((frame->height != 480 || format_desc_.height != 486) && // don't deinterlace for NTSC DV
273 display_mode_ == display_mode::simple && mode != core::field_mode::progressive && format_desc_.field_mode != core::field_mode::progressive &&
274 frame->height != format_desc_.height)
276 display_mode_ = display_mode::deinterlace_bob_reinterlace; // The frame will most likely be scaled, we need to deinterlace->reinterlace
279 // ALWAYS de-interlace, until we have GPU de-interlacing.
280 if(force_deinterlacing_ && frame->interlaced_frame && display_mode_ != display_mode::deinterlace_bob && display_mode_ != display_mode::deinterlace)
281 display_mode_ = display_mode::deinterlace_bob_reinterlace;
283 if(display_mode_ == display_mode::deinterlace)
284 filter_str = append_filter(filter_str, L"YADIF=0:-1");
285 else if(display_mode_ == display_mode::deinterlace_bob || display_mode_ == display_mode::deinterlace_bob_reinterlace)
286 filter_str = append_filter(filter_str, L"YADIF=1:-1");
288 if(display_mode_ == display_mode::invalid)
290 CASPAR_LOG(warning) << L"[frame_muxer] Auto-transcode: Failed to detect display-mode.";
291 display_mode_ = display_mode::simple;
294 if(frame->height == 480) // NTSC DV
296 auto pad_str = L"PAD=" + boost::lexical_cast<std::wstring>(frame->width) + L":486:0:2:black";
297 filter_str = append_filter(filter_str, pad_str);
300 filter_ = filter(filter_str);
301 CASPAR_LOG(info) << L"[frame_muxer] " << display_mode_ << L" " << print_mode(frame->width, frame->height, in_fps_, frame->interlaced_frame > 0);
304 uint32_t calc_nb_frames(uint32_t nb_frames) const
306 uint64_t nb_frames2 = nb_frames;
308 if(filter_.is_double_rate()) // Take into account transformations in filter.
311 switch(display_mode_) // Take into account transformation in run.
313 case display_mode::deinterlace_bob_reinterlace:
314 case display_mode::interlace:
315 case display_mode::half:
318 case display_mode::duplicate:
323 return static_cast<uint32_t>(nb_frames2);
328 while(!video_stream_.empty())
331 audio_stream_.clear();
333 while(!frame_buffer_.empty())
336 filter_ = filter(filter_.filter_str());
340 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)
341 : impl_(new impl(in_fps, frame_factory, format_desc, filter)){}
342 void frame_muxer::push_video(const std::shared_ptr<AVFrame>& frame){impl_->push_video(frame);}
343 void frame_muxer::push_audio(const std::shared_ptr<AVFrame>& frame){impl_->push_audio(frame);}
344 bool frame_muxer::empty() const{return impl_->empty();}
345 core::draw_frame frame_muxer::front() const{return impl_->front();}
346 void frame_muxer::pop(){return impl_->pop();}
347 void frame_muxer::clear(){impl_->clear();}
348 uint32_t frame_muxer::calc_nb_frames(uint32_t nb_frames) const {return impl_->calc_nb_frames(nb_frames);}
349 bool frame_muxer::video_ready() const{return impl_->video_ready();}
350 bool frame_muxer::audio_ready() const{return impl_->audio_ready();}