2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>
\r
4 * This file is part of CasparCG (www.casparcg.com).
\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
19 * Author: Robert Nagy, ronag89@gmail.com
\r
22 #include "../../stdafx.h"
\r
26 #include "../util/util.h"
\r
27 #include "../../ffmpeg_error.h"
\r
29 #include <common/diagnostics/graph.h>
\r
30 #include <common/executor.h>
\r
31 #include <common/lock.h>
\r
32 #include <common/except.h>
\r
33 #include <common/log.h>
\r
35 #include <core/video_format.h>
\r
37 #include <tbb/concurrent_queue.h>
\r
38 #include <tbb/atomic.h>
\r
39 #include <tbb/recursive_mutex.h>
\r
41 #include <boost/range/algorithm.hpp>
\r
42 #include <boost/thread/condition_variable.hpp>
\r
43 #include <boost/thread/mutex.hpp>
\r
44 #include <boost/thread/thread.hpp>
\r
46 #if defined(_MSC_VER)
\r
47 #pragma warning (push)
\r
48 #pragma warning (disable : 4244)
\r
52 #define __STDC_CONSTANT_MACROS
\r
53 #define __STDC_LIMIT_MACROS
\r
54 #include <libavformat/avformat.h>
\r
56 #if defined(_MSC_VER)
\r
57 #pragma warning (pop)
\r
60 namespace caspar { namespace ffmpeg {
\r
62 static const int MIN_FRAMES = 25;
\r
66 stream(const stream&);
\r
67 stream& operator=(const stream&);
\r
69 typedef tbb::concurrent_bounded_queue<std::shared_ptr<AVPacket>>::size_type size_type;
\r
72 tbb::concurrent_bounded_queue<std::shared_ptr<AVPacket>> packets_;
\r
80 void push(const std::shared_ptr<AVPacket>& packet)
\r
82 if(packet->stream_index != index_ && packet != flush_packet() && packet != null_packet())
\r
85 packets_.push(packet);
\r
88 bool try_pop(std::shared_ptr<AVPacket>& packet)
\r
90 return packets_.try_pop(packet);
\r
95 std::shared_ptr<AVPacket> packet;
\r
96 while(packets_.try_pop(packet));
\r
99 size_type size() const
\r
101 return index_ != -1 ? packets_.size() : std::numeric_limits<size_type>::max();
\r
105 struct input::impl : boost::noncopyable
\r
107 const spl::shared_ptr<diagnostics::graph> graph_;
\r
109 const spl::shared_ptr<AVFormatContext> format_context_; // Destroy this last
\r
110 const int default_stream_index_;
\r
112 const std::wstring filename_;
\r
113 tbb::atomic<uint32_t> start_;
\r
114 tbb::atomic<uint32_t> length_;
\r
115 tbb::atomic<bool> loop_;
\r
116 tbb::atomic<bool> eof_;
\r
118 uint32_t frame_number_;
\r
120 stream video_stream_;
\r
121 stream audio_stream_;
\r
123 tbb::atomic<uint32_t> seek_target_;
\r
125 tbb::atomic<bool> is_running_;
\r
126 boost::mutex mutex_;
\r
127 boost::condition_variable cond_;
\r
128 boost::thread thread_;
\r
130 impl(const spl::shared_ptr<diagnostics::graph> graph, const std::wstring& filename, const bool loop, const uint32_t start, const uint32_t length)
\r
132 , format_context_(open_input(filename))
\r
133 , default_stream_index_(av_find_default_stream_index(format_context_.get()))
\r
134 , filename_(filename)
\r
136 , fps_(read_fps(*format_context_, 0.0))
\r
137 , video_stream_(av_find_best_stream(format_context_.get(), AVMEDIA_TYPE_VIDEO, -1, -1, 0, 0))
\r
138 , audio_stream_(av_find_best_stream(format_context_.get(), AVMEDIA_TYPE_AUDIO, -1, -1, 0, 0))
\r
144 seek_target_ = start_ != 0 ? start_ : std::numeric_limits<uint32_t>::max();
\r
145 is_running_ = true;
\r
150 graph_->set_color("seek", diagnostics::color(1.0f, 0.5f, 0.0f));
\r
151 graph_->set_color("audio-buffer", diagnostics::color(0.7f, 0.4f, 0.4f));
\r
152 graph_->set_color("video-buffer", diagnostics::color(1.0f, 1.0f, 0.0f));
\r
154 thread_ = boost::thread([this]{run();});
\r
159 is_running_ = false;
\r
160 cond_.notify_one();
\r
164 bool try_pop_video(std::shared_ptr<AVPacket>& packet)
\r
166 bool result = video_stream_.try_pop(packet);
\r
168 cond_.notify_one();
\r
170 graph_->set_value("video-buffer", std::min(1.0, static_cast<double>(video_stream_.size()/MIN_FRAMES)));
\r
175 bool try_pop_audio(std::shared_ptr<AVPacket>& packet)
\r
177 bool result = audio_stream_.try_pop(packet);
\r
179 cond_.notify_one();
\r
181 graph_->set_value("audio-buffer", std::min(1.0, static_cast<double>(audio_stream_.size()/MIN_FRAMES)));
\r
186 void seek(uint32_t target)
\r
189 boost::lock_guard<boost::mutex> lock(mutex_);
\r
191 seek_target_ = target;
\r
192 video_stream_.clear();
\r
193 audio_stream_.clear();
\r
200 cond_.notify_one();
\r
203 std::wstring print() const
\r
205 return L"ffmpeg_input[" + filename_ + L")]";
\r
209 void internal_seek(uint32_t target)
\r
211 CASPAR_LOG(debug) << print() << " Seeking: " << target;
\r
213 int flags = AVSEEK_FLAG_FRAME;
\r
217 int vid_stream_index = av_find_best_stream(format_context_.get(), AVMEDIA_TYPE_VIDEO, -1, -1, 0, 0);
\r
218 if(vid_stream_index >= 0)
\r
220 auto codec_id = format_context_->streams[vid_stream_index]->codec->codec_id;
\r
221 if(codec_id == CODEC_ID_VP6A || codec_id == CODEC_ID_VP6F || codec_id == CODEC_ID_VP6)
\r
222 flags = AVSEEK_FLAG_BYTE;
\r
226 auto stream = format_context_->streams[default_stream_index_];
\r
227 auto codec = stream->codec;
\r
228 auto fixed_target = (target*stream->time_base.den*codec->time_base.num)/(stream->time_base.num*codec->time_base.den)*codec->ticks_per_frame;
\r
230 THROW_ON_ERROR2(avformat_seek_file(format_context_.get(), default_stream_index_, std::numeric_limits<int64_t>::min(), fixed_target, fixed_target, 0), print());
\r
232 video_stream_.push(flush_packet());
\r
233 audio_stream_.push(flush_packet());
\r
238 return video_stream_.size() > MIN_FRAMES && audio_stream_.size() > MIN_FRAMES;
\r
243 auto target = seek_target_.fetch_and_store(std::numeric_limits<uint32_t>::max());
\r
244 if(target != std::numeric_limits<uint32_t>::max())
\r
245 internal_seek(target);
\r
247 auto packet = create_packet();
\r
249 auto ret = av_read_frame(format_context_.get(), packet.get()); // packet is only valid until next call of av_read_frame. Use av_dup_packet to extend its life.
\r
253 for(int n = 0; n < 3; ++n)
\r
255 video_stream_.push(null_packet());
\r
256 audio_stream_.push(null_packet());
\r
261 internal_seek(start_);
\r
262 graph_->set_tag("seek");
\r
269 THROW_ON_ERROR(ret, "av_read_frame", print());
\r
271 THROW_ON_ERROR2(av_dup_packet(packet.get()), print());
\r
273 // Make sure that the packet is correctly deallocated even if size and data is modified during decoding.
\r
274 auto size = packet->size;
\r
275 auto data = packet->data;
\r
277 packet = spl::shared_ptr<AVPacket>(packet.get(), [packet, size, data](AVPacket*)
\r
279 packet->size = size;
\r
280 packet->data = data;
\r
283 auto stream_time_base = format_context_->streams[packet->stream_index]->time_base;
\r
284 auto packet_frame_number = static_cast<uint32_t>((static_cast<double>(packet->pts * stream_time_base.num)/stream_time_base.den)*fps_);
\r
286 if(packet->stream_index == default_stream_index_)
\r
287 frame_number_ = packet_frame_number;
\r
289 if(packet_frame_number >= start_ && packet_frame_number < length_)
\r
291 video_stream_.push(packet);
\r
292 audio_stream_.push(packet);
\r
294 graph_->set_value("video-buffer", std::min(1.0, static_cast<double>(video_stream_.size()/MIN_FRAMES)));
\r
295 graph_->set_value("audio-buffer", std::min(1.0, static_cast<double>(audio_stream_.size()/MIN_FRAMES)));
\r
302 win32_exception::install_handler();
\r
309 boost::this_thread::sleep(boost::posix_time::milliseconds(1));
\r
312 boost::unique_lock<boost::mutex> lock(mutex_);
\r
314 while((full() || eof_) && is_running_)
\r
322 CASPAR_LOG_CURRENT_EXCEPTION();
\r
323 is_running_ = false;
\r
328 bool is_eof(int ret)
\r
330 #pragma warning (disable : 4146)
\r
332 //if(ret == AVERROR(EIO))
\r
333 // CASPAR_LOG(trace) << print() << " Received EIO, assuming EOF. ";
\r
334 //if(ret == AVERROR_EOF)
\r
335 // CASPAR_LOG(trace) << print() << " Received EOF. ";
\r
337 return ret == AVERROR_EOF || ret == AVERROR(EIO) || frame_number_ > length_; // av_read_frame doesn't always correctly return AVERROR_EOF;
\r
341 input::input(const spl::shared_ptr<diagnostics::graph>& graph, const std::wstring& filename, bool loop, uint32_t start, uint32_t length)
\r
342 : impl_(new impl(graph, filename, loop, start, length)){}
\r
343 bool input::try_pop_video(std::shared_ptr<AVPacket>& packet){return impl_->try_pop_video(packet);}
\r
344 bool input::try_pop_audio(std::shared_ptr<AVPacket>& packet){return impl_->try_pop_audio(packet);}
\r
345 AVFormatContext& input::context(){return *impl_->format_context_;}
\r
346 void input::loop(bool value){impl_->loop_ = value;}
\r
347 bool input::loop() const{return impl_->loop_;}
\r
348 void input::seek(uint32_t target){impl_->seek(target);}
\r
349 void input::start(uint32_t value){impl_->start_ = value;}
\r
350 uint32_t input::start() const{return impl_->start_;}
\r
351 void input::length(uint32_t value){impl_->length_ = value;}
\r
352 uint32_t input::length() const{return impl_->length_;}
\r