2 * copyright (c) 2010 Sveriges Television AB <info@casparcg.com>
\r
4 * This file is part of CasparCG.
\r
6 * CasparCG is free software: you can redistribute it and/or modify
\r
7 * it under the terms of the GNU General Public License as published by
\r
8 * the Free Software Foundation, either version 3 of the License, or
\r
9 * (at your option) any later version.
\r
11 * CasparCG is distributed in the hope that it will be useful,
\r
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
\r
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
\r
14 * GNU General Public License for more details.
\r
16 * You should have received a copy of the GNU General Public License
\r
17 * along with CasparCG. If not, see <http://www.gnu.org/licenses/>.
\r
20 #if defined(_MSC_VER)
\r
21 #pragma warning (disable : 4244)
\r
24 #include "..\stdafx.h"
\r
27 #include "../ffmpeg_error.h"
\r
29 #include <core/video_format.h>
\r
31 #include <common/concurrency/executor.h>
\r
32 #include <common/diagnostics/graph.h>
\r
34 #include <tbb/concurrent_queue.h>
\r
35 #include <tbb/mutex.h>
\r
37 #include <boost/range/iterator_range.hpp>
\r
38 #include <boost/range/algorithm.hpp>
\r
42 #define __STDC_CONSTANT_MACROS
\r
43 #define __STDC_LIMIT_MACROS
\r
44 #include <libavformat/avformat.h>
\r
49 struct input::implementation : boost::noncopyable
\r
51 static const size_t PACKET_BUFFER_COUNT = 50;
\r
53 safe_ptr<diagnostics::graph> graph_;
\r
55 std::shared_ptr<AVFormatContext> format_context_; // Destroy this last
\r
57 std::shared_ptr<AVCodecContext> video_codec_context_;
\r
58 std::shared_ptr<AVCodecContext> audio_codex_context_;
\r
60 const std::wstring filename_;
\r
68 tbb::concurrent_bounded_queue<packet> video_packet_buffer_;
\r
69 tbb::concurrent_bounded_queue<packet> audio_packet_buffer_;
\r
71 boost::condition_variable cond_;
\r
72 boost::mutex mutex_;
\r
74 std::exception_ptr exception_;
\r
77 explicit implementation(const safe_ptr<diagnostics::graph>& graph, const std::wstring& filename, bool loop, int start, int length)
\r
80 , video_s_index_(-1)
\r
81 , audio_s_index_(-1)
\r
82 , filename_(filename)
\r
83 , executor_(print())
\r
84 , start_(std::max(start, 0))
\r
86 , eof_count_(length)
\r
88 graph_->set_color("input-buffer", diagnostics::color(1.0f, 1.0f, 0.0f));
\r
89 graph_->set_color("seek", diagnostics::color(0.5f, 1.0f, 0.5f));
\r
92 AVFormatContext* weak_format_context_ = nullptr;
\r
93 if((errn = av_open_input_file(&weak_format_context_, narrow(filename).c_str(), nullptr, 0, nullptr)) < 0 || weak_format_context_ == nullptr)
\r
94 BOOST_THROW_EXCEPTION(
\r
95 file_read_error() <<
\r
96 source_info(narrow(print())) <<
\r
97 msg_info(av_error_str(errn)) <<
\r
98 boost::errinfo_api_function("av_open_input_file") <<
\r
99 boost::errinfo_errno(AVUNERROR(errn)) <<
\r
100 boost::errinfo_file_name(narrow(filename)));
\r
102 format_context_.reset(weak_format_context_, av_close_input_file);
\r
104 if((errn = av_find_stream_info(format_context_.get())) < 0)
\r
106 BOOST_THROW_EXCEPTION(
\r
107 file_read_error() <<
\r
108 source_info(narrow(print())) <<
\r
109 msg_info(av_error_str(errn)) <<
\r
110 boost::errinfo_api_function("av_find_stream_info") <<
\r
111 boost::errinfo_errno(AVUNERROR(errn)));
\r
114 video_codec_context_ = open_stream(AVMEDIA_TYPE_VIDEO, video_s_index_);
\r
115 if(!video_codec_context_)
\r
116 CASPAR_LOG(warning) << print() << " Could not open any video stream.";
\r
118 fix_time_base(video_codec_context_.get());
\r
120 audio_codex_context_ = open_stream(AVMEDIA_TYPE_AUDIO, audio_s_index_);
\r
121 if(!audio_codex_context_)
\r
122 CASPAR_LOG(warning) << print() << " Could not open any audio stream.";
\r
124 fix_time_base(audio_codex_context_.get());
\r
126 if(!video_codec_context_ && !audio_codex_context_)
\r
128 BOOST_THROW_EXCEPTION(
\r
129 file_read_error() <<
\r
130 msg_info(av_error_str(errn)) <<
\r
131 source_info(narrow(print())) <<
\r
132 msg_info("No video or audio codec context found."));
\r
136 seek_frame(start_);
\r
139 executor_.begin_invoke([this]{read_file();});
\r
140 CASPAR_LOG(info) << print() << " Started.";
\r
147 cond_.notify_all();
\r
150 packet get_video_packet()
\r
152 return get_packet(video_packet_buffer_);
\r
155 packet get_audio_packet()
\r
157 return get_packet(audio_packet_buffer_);
\r
160 bool has_packet() const
\r
162 return !video_packet_buffer_.empty() || !audio_packet_buffer_.empty();
\r
167 return static_cast<double>(get_default_context()->time_base.den) / static_cast<double>(get_default_context()->time_base.num);
\r
175 CASPAR_LOG(info) << print() << " Stopped.";
\r
178 void fix_time_base(AVCodecContext* context) const // Some files give an invalid numerator, try to fix it.
\r
180 if(context && context->time_base.num == 1)
\r
181 context->time_base.num = static_cast<int>(std::pow(10.0, static_cast<int>(std::log10(static_cast<float>(context->time_base.den)))-1));
\r
184 std::shared_ptr<AVCodecContext> open_stream(int codec_type, int& s_index) const
\r
186 const auto streams = boost::iterator_range<AVStream**>(format_context_->streams, format_context_->streams+format_context_->nb_streams);
\r
187 const auto stream = boost::find_if(streams, [&](AVStream* stream)
\r
189 return stream != nullptr && stream->codec->codec_type == codec_type;
\r
192 if(stream == streams.end())
\r
195 auto codec = avcodec_find_decoder((*stream)->codec->codec_id);
\r
196 if(codec == nullptr)
\r
199 if(avcodec_open((*stream)->codec, codec) < 0)
\r
202 s_index = (*stream)->index;
\r
204 return std::shared_ptr<AVCodecContext>((*stream)->codec, avcodec_close);
\r
207 std::shared_ptr<AVCodecContext>& get_default_context()
\r
209 return video_codec_context_ ? video_codec_context_ : audio_codex_context_;
\r
214 if(audio_packet_buffer_.size() > 4 && video_packet_buffer_.size() > 4)
\r
215 boost::this_thread::yield(); // There is enough packets, no hurry.
\r
219 std::shared_ptr<AVPacket> read_packet(new AVPacket(), [](AVPacket* p)
\r
225 const int errn = av_read_frame(format_context_.get(), read_packet.get()); // read_packet is only valid until next call of av_read_frame.
\r
226 if(is_eof(errn)) // Use av_dup_packet to extend its life.
\r
230 seek_frame(start_, AVSEEK_FLAG_BACKWARD);
\r
231 // AVCodecContext.frame_number is not reset. Increase the target frame_number.
\r
232 eof_count_ += length_;
\r
233 graph_->add_tag("seek");
\r
240 BOOST_THROW_EXCEPTION(
\r
241 invalid_operation() <<
\r
242 msg_info(av_error_str(errn)) <<
\r
243 source_info(narrow(print())) <<
\r
244 boost::errinfo_api_function("av_read_frame") <<
\r
245 boost::errinfo_errno(AVUNERROR(errn)));
\r
249 if(read_packet->stream_index == video_s_index_)
\r
251 av_dup_packet(read_packet.get());
\r
252 video_packet_buffer_.try_push(packet(read_packet));
\r
254 else if(read_packet->stream_index)
\r
256 av_dup_packet(read_packet.get());
\r
257 audio_packet_buffer_.try_push(packet(read_packet));
\r
261 graph_->update_value("input-buffer", static_cast<float>(video_packet_buffer_.size())/static_cast<float>(PACKET_BUFFER_COUNT));
\r
266 CASPAR_LOG_CURRENT_EXCEPTION();
\r
270 executor_.begin_invoke([this]{read_file();});
\r
271 boost::unique_lock<boost::mutex> lock(mutex_);
\r
272 while(executor_.is_running() && audio_packet_buffer_.size() > PACKET_BUFFER_COUNT && video_packet_buffer_.size() > PACKET_BUFFER_COUNT)
\r
276 void seek_frame(int64_t frame, int flags = 0)
\r
278 // Convert from frames into seconds.
\r
279 const auto ts = frame*static_cast<int64_t>((AV_TIME_BASE*get_default_context()->time_base.num) / get_default_context()->time_base.den);
\r
281 const int errn = av_seek_frame(format_context_.get(), -1, ts, flags | AVSEEK_FLAG_FRAME);
\r
285 BOOST_THROW_EXCEPTION(
\r
286 invalid_operation() <<
\r
287 source_info(narrow(print())) <<
\r
288 msg_info(av_error_str(errn)) <<
\r
289 boost::errinfo_api_function("seek_frame") <<
\r
290 boost::errinfo_errno(AVUNERROR(errn)));
\r
293 // Notify decoders to flush buffers.
\r
294 video_packet_buffer_.try_push(flush_packet);
\r
295 audio_packet_buffer_.try_push(flush_packet);
\r
298 bool is_eof(int errn)
\r
301 return get_default_context()->frame_number > eof_count_;
\r
303 return errn == AVERROR_EOF;
\r
306 packet get_packet(tbb::concurrent_bounded_queue<packet>& buffer)
\r
309 if(buffer.try_pop(packet))
\r
310 cond_.notify_all();
\r
314 std::wstring print() const
\r
316 return L"ffmpeg_input[" + filename_ + L"]";
\r
320 input::input(const safe_ptr<diagnostics::graph>& graph, const std::wstring& filename, bool loop, int start, int length)
\r
321 : impl_(new implementation(graph, filename, loop, start, length)){}
\r
322 const std::shared_ptr<AVCodecContext>& input::get_video_codec_context() const{return impl_->video_codec_context_;}
\r
323 const std::shared_ptr<AVCodecContext>& input::get_audio_codec_context() const{return impl_->audio_codex_context_;}
\r
324 bool input::has_packet() const{return impl_->has_packet();}
\r
325 bool input::is_running() const {return impl_->executor_.is_running();}
\r
326 packet input::get_video_packet(){return impl_->get_video_packet();}
\r
327 packet input::get_audio_packet(){return impl_->get_audio_packet();}
\r
328 double input::fps() const { return impl_->fps(); }
\r