-/*\r
-* copyright (c) 2010 Sveriges Television AB <info@casparcg.com>\r
-*\r
-* This file is part of CasparCG.\r
-*\r
-* CasparCG is free software: you can redistribute it and/or modify\r
-* it under the terms of the GNU General Public License as published by\r
-* the Free Software Foundation, either version 3 of the License, or\r
-* (at your option) any later version.\r
-*\r
-* CasparCG is distributed in the hope that it will be useful,\r
-* but WITHOUT ANY WARRANTY; without even the implied warranty of\r
-* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
-* GNU General Public License for more details.\r
-\r
-* You should have received a copy of the GNU General Public License\r
-* along with CasparCG. If not, see <http://www.gnu.org/licenses/>.\r
-*\r
-*/\r
-#if defined(_MSC_VER)\r
-#pragma warning (disable : 4244)\r
-#endif\r
-\r
-#include "../../stdafx.h"\r
-\r
-#include "input.h"\r
-\r
-#include "../util/util.h"\r
-#include "../../ffmpeg_error.h"\r
-\r
-#include <core/video_format.h>\r
-\r
-#include <common/diagnostics/graph.h>\r
-#include <common/exception/exceptions.h>\r
-#include <common/exception/win32_exception.h>\r
-\r
-#include <tbb/atomic.h>\r
-\r
-#include <agents.h>\r
-#include <concrt_extras.h>\r
-\r
-#if defined(_MSC_VER)\r
-#pragma warning (push)\r
-#pragma warning (disable : 4244)\r
-#endif\r
-extern "C" \r
-{\r
- #define __STDC_CONSTANT_MACROS\r
- #define __STDC_LIMIT_MACROS\r
- #include <libavformat/avformat.h>\r
-}\r
-#if defined(_MSC_VER)\r
-#pragma warning (pop)\r
-#endif\r
-\r
-\r
-#undef Yield\r
-using namespace Concurrency;\r
-\r
-namespace caspar { namespace ffmpeg {\r
-\r
-static const size_t MAX_PACKETS_SIZE = 16 * 1000000;\r
-static const size_t MAX_PACKETS_COUNT = 50;\r
- \r
-struct input::implementation : public Concurrency::agent\r
- , public std::enable_shared_from_this<implementation>\r
- , boost::noncopyable\r
-{\r
- input::target_t& target_;\r
-\r
- const std::wstring filename_;\r
- const safe_ptr<AVFormatContext> format_context_; // Destroy this last\r
- int default_stream_index_;\r
- const boost::iterator_range<AVStream**> streams_;\r
-\r
- safe_ptr<diagnostics::graph> graph_;\r
- \r
- tbb::atomic<bool> loop_;\r
- const size_t start_; \r
- const size_t length_;\r
- size_t frame_number_;\r
- \r
- tbb::atomic<size_t> nb_frames_;\r
- tbb::atomic<size_t> nb_loops_; \r
- tbb::atomic<size_t> packets_count_;\r
- tbb::atomic<size_t> packets_size_;\r
-\r
- tbb::atomic<bool> is_running_;\r
-\r
- Concurrency::event event_;\r
- \r
-public:\r
- explicit implementation(input::target_t& target,\r
- const safe_ptr<diagnostics::graph>& graph, \r
- const std::wstring& filename, \r
- bool loop, \r
- size_t start,\r
- size_t length)\r
- : target_(target)\r
- , filename_(filename)\r
- , format_context_(open_input(filename)) \r
- , default_stream_index_(av_find_default_stream_index(format_context_.get()))\r
- , streams_(format_context_->streams, format_context_->streams + format_context_->nb_streams)\r
- , graph_(graph)\r
- , start_(start)\r
- , length_(length)\r
- , frame_number_(0)\r
- { \r
- event_.set();\r
- loop_ = loop;\r
- \r
- //av_dump_format(format_context_.get(), 0, narrow(filename).c_str(), 0);\r
- \r
- if(start_ > 0) \r
- seek_frame(start_);\r
- \r
- graph_->set_color("seek", diagnostics::color(1.0f, 0.5f, 0.0f));\r
- graph_->set_color("buffer-count", diagnostics::color(0.7f, 0.4f, 0.4f));\r
- graph_->set_color("buffer-size", diagnostics::color(1.0f, 1.0f, 0.0f)); \r
- \r
- is_running_ = true;\r
- agent::start();\r
- }\r
-\r
- ~implementation()\r
- {\r
- if(is_running_)\r
- stop();\r
- }\r
- \r
- void stop()\r
- {\r
- is_running_ = false;\r
- event_.set();\r
- agent::wait(this);\r
- }\r
- \r
- virtual void run()\r
- {\r
- win32_exception::install_handler();\r
-\r
- try\r
- {\r
- for(auto packet = read_next_packet(); packet && is_running_; packet = read_next_packet())\r
- { \r
- Concurrency::asend(target_, make_safe_ptr(packet));\r
- Context::Yield();\r
- event_.wait();\r
- }\r
- }\r
- catch(...)\r
- {\r
- CASPAR_LOG_CURRENT_EXCEPTION();\r
- } \r
- \r
- BOOST_FOREACH(auto stream, streams_)\r
- Concurrency::send(target_, flush_packet(stream->index)); \r
- BOOST_FOREACH(auto stream, streams_)\r
- Concurrency::send(target_, eof_packet(stream->index)); \r
-\r
- done();\r
- }\r
-\r
- std::shared_ptr<AVPacket> read_next_packet()\r
- { \r
- auto packet = create_packet();\r
- \r
- int ret = [&]() -> int\r
- {\r
- Concurrency::scoped_oversubcription_token oversubscribe;\r
- return 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
- }();\r
-\r
- if(is_eof(ret)) \r
- {\r
- ++nb_loops_;\r
- frame_number_ = 0;\r
-\r
- if(loop_)\r
- {\r
- CASPAR_LOG(trace) << print() << " Looping.";\r
- seek_frame(start_, AVSEEK_FLAG_BACKWARD); \r
- return read_next_packet();\r
- } \r
- else\r
- {\r
- CASPAR_LOG(trace) << print() << " Stopping.";\r
- return nullptr;\r
- }\r
- }\r
-\r
- THROW_ON_ERROR(ret, "av_read_frame", print());\r
-\r
- if(packet->stream_index == default_stream_index_)\r
- {\r
- if(nb_loops_ == 0)\r
- ++nb_frames_;\r
- ++frame_number_;\r
- }\r
-\r
- THROW_ON_ERROR2(av_dup_packet(packet.get()), print());\r
- \r
- // Make sure that the packet is correctly deallocated even if size and data is modified during decoding.\r
- auto size = packet->size;\r
- auto data = packet->data; \r
- \r
- ++packets_count_;\r
- packets_size_ += size;\r
- \r
- graph_->update_value("buffer-size", (packets_size_+0.001)/MAX_PACKETS_SIZE);\r
- graph_->update_value("buffer-count", (packets_count_+0.001)/MAX_PACKETS_COUNT);\r
-\r
- auto self = shared_from_this();\r
- packet = safe_ptr<AVPacket>(packet.get(), [this, self, packet, size, data](AVPacket*)\r
- {\r
- packet->size = size;\r
- packet->data = data;\r
- --packets_count_;\r
- packets_size_ -= size;\r
- event_.set();\r
-\r
- graph_->update_value("buffer-size", (packets_size_+0.001)/MAX_PACKETS_SIZE);\r
- graph_->update_value("buffer-count", (packets_count_+0.001)/MAX_PACKETS_COUNT);\r
- });\r
-\r
- if(is_running_ && (packets_count_ > MAX_PACKETS_COUNT || packets_size_ > MAX_PACKETS_SIZE))\r
- event_.reset();\r
- \r
- return packet;\r
- }\r
-\r
- void seek_frame(int64_t frame, int flags = 0)\r
- { \r
- if(flags == AVSEEK_FLAG_BACKWARD)\r
- {\r
- // Fix VP6 seeking\r
- int vid_stream_index = av_find_best_stream(format_context_.get(), AVMEDIA_TYPE_VIDEO, -1, -1, 0, 0);\r
- if(vid_stream_index >= 0)\r
- {\r
- auto codec_id = format_context_->streams[vid_stream_index]->codec->codec_id;\r
- if(codec_id == CODEC_ID_VP6A || codec_id == CODEC_ID_VP6F || codec_id == CODEC_ID_VP6)\r
- flags |= AVSEEK_FLAG_BYTE;\r
- }\r
- }\r
-\r
- THROW_ON_ERROR2(av_seek_frame(format_context_.get(), default_stream_index_, frame, flags), print()); \r
- auto packet = create_packet();\r
- packet->size = 0;\r
-\r
- BOOST_FOREACH(auto stream, streams_)\r
- Concurrency::asend(target_, flush_packet(stream->index)); \r
-\r
- graph_->add_tag("seek"); \r
- } \r
-\r
- bool is_eof(int ret)\r
- {\r
- if(ret == AVERROR(EIO))\r
- CASPAR_LOG(trace) << print() << " Received EIO, assuming EOF. " << nb_frames_;\r
- if(ret == AVERROR_EOF)\r
- CASPAR_LOG(trace) << print() << " Received EOF. " << nb_frames_;\r
-\r
- CASPAR_VERIFY(ret >= 0 || ret == AVERROR_EOF || ret == AVERROR(EIO), ffmpeg_error() << source_info(narrow(print())));\r
-\r
- return ret == AVERROR_EOF || ret == AVERROR(EIO) || frame_number_ >= length_; // av_read_frame doesn't always correctly return AVERROR_EOF;\r
- }\r
- \r
- std::wstring print() const\r
- {\r
- return L"ffmpeg_input[" + filename_ + L")]";\r
- }\r
-};\r
-\r
-input::input(input::target_t& target,\r
- const safe_ptr<diagnostics::graph>& graph, \r
- const std::wstring& filename, \r
- bool loop, \r
- size_t start, \r
- size_t length)\r
- : impl_(new implementation(target, graph, filename, loop, start, length))\r
-{\r
-}\r
-\r
-safe_ptr<AVFormatContext> input::context()\r
-{\r
- return safe_ptr<AVFormatContext>(impl_->format_context_);\r
-}\r
-\r
-size_t input::nb_frames() const\r
-{\r
- return impl_->nb_frames_;\r
-}\r
-\r
-size_t input::nb_loops() const \r
-{\r
- return impl_->nb_loops_;\r
-}\r
-\r
-void input::stop()\r
-{\r
- impl_->stop();\r
-}\r
-\r
-bool input::loop() const\r
-{\r
- return impl_->loop_;\r
-}\r
-void input::loop(bool value)\r
-{\r
- impl_->loop_ = value;\r
-}\r
-\r
-}}
\ No newline at end of file
+/*
+* Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>
+*
+* This file is part of CasparCG (www.casparcg.com).
+*
+* CasparCG is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* CasparCG is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with CasparCG. If not, see <http://www.gnu.org/licenses/>.
+*
+* Author: Robert Nagy, ronag89@gmail.com
+*/
+
+#include "../../stdafx.h"
+
+#include "input.h"
+
+#include "../util/util.h"
+#include "../../ffmpeg_error.h"
+
+#include <common/diagnostics/graph.h>
+#include <common/executor.h>
+#include <common/lock.h>
+#include <common/except.h>
+#include <common/log.h>
+
+#include <core/video_format.h>
+
+#include <tbb/concurrent_queue.h>
+#include <tbb/atomic.h>
+#include <tbb/recursive_mutex.h>
+
+#include <boost/range/algorithm.hpp>
+#include <boost/thread/condition_variable.hpp>
+#include <boost/thread/mutex.hpp>
+#include <boost/thread/thread.hpp>
+
+#if defined(_MSC_VER)
+#pragma warning (push)
+#pragma warning (disable : 4244)
+#endif
+extern "C"
+{
+ #define __STDC_CONSTANT_MACROS
+ #define __STDC_LIMIT_MACROS
+ #include <libavformat/avformat.h>
+}
+#if defined(_MSC_VER)
+#pragma warning (pop)
+#endif
+
+namespace caspar { namespace ffmpeg {
+
+static const int MIN_FRAMES = 25;
+
+class stream
+{
+ stream(const stream&);
+ stream& operator=(const stream&);
+
+ typedef tbb::concurrent_bounded_queue<std::shared_ptr<AVPacket>>::size_type size_type;
+
+ int index_;
+ tbb::concurrent_bounded_queue<std::shared_ptr<AVPacket>> packets_;
+public:
+
+ stream(int index)
+ : index_(index)
+ {
+ }
+
+ void push(const std::shared_ptr<AVPacket>& packet)
+ {
+ if(packet && packet->data && packet->stream_index != index_)
+ return;
+
+ packets_.push(packet);
+ }
+
+ bool try_pop(std::shared_ptr<AVPacket>& packet)
+ {
+ return packets_.try_pop(packet);
+ }
+
+ void clear()
+ {
+ std::shared_ptr<AVPacket> packet;
+ while(packets_.try_pop(packet));
+ }
+
+ size_type size() const
+ {
+ return index_ != -1 ? packets_.size() : std::numeric_limits<size_type>::max();
+ }
+};
+
+struct input::impl : boost::noncopyable
+{
+ const spl::shared_ptr<diagnostics::graph> graph_;
+
+ const spl::shared_ptr<AVFormatContext> format_context_; // Destroy this last
+ const int default_stream_index_;
+
+ const std::wstring filename_;
+ tbb::atomic<uint32_t> start_;
+ tbb::atomic<uint32_t> length_;
+ tbb::atomic<bool> loop_;
+ double fps_;
+ uint32_t frame_number_;
+
+ stream video_stream_;
+ stream audio_stream_;
+
+ boost::optional<uint32_t> seek_target_;
+
+ tbb::atomic<bool> is_running_;
+ boost::mutex mutex_;
+ boost::condition_variable cond_;
+ boost::thread thread_;
+
+ impl(const spl::shared_ptr<diagnostics::graph> graph, const std::wstring& filename, const bool loop, const uint32_t start, const uint32_t length)
+ : graph_(graph)
+ , format_context_(open_input(filename))
+ , default_stream_index_(av_find_default_stream_index(format_context_.get()))
+ , filename_(filename)
+ , frame_number_(0)
+ , fps_(read_fps(*format_context_, 0.0))
+ , video_stream_(av_find_best_stream(format_context_.get(), AVMEDIA_TYPE_VIDEO, -1, -1, 0, 0))
+ , audio_stream_(av_find_best_stream(format_context_.get(), AVMEDIA_TYPE_AUDIO, -1, -1, 0, 0))
+ {
+ start_ = start;
+ length_ = length;
+ loop_ = loop;
+ is_running_ = true;
+
+ if(start_ != 0)
+ seek_target_ = start_;
+
+ graph_->set_color("seek", diagnostics::color(1.0f, 0.5f, 0.0f));
+ graph_->set_color("audio-buffer", diagnostics::color(0.7f, 0.4f, 0.4f));
+ graph_->set_color("video-buffer", diagnostics::color(1.0f, 1.0f, 0.0f));
+
+ for(int n = 0; n < 8; ++n)
+ tick();
+
+ thread_ = boost::thread([this]{run();});
+ }
+
+ ~impl()
+ {
+ is_running_ = false;
+ cond_.notify_one();
+ thread_.join();
+ }
+
+ bool try_pop_video(std::shared_ptr<AVPacket>& packet)
+ {
+ bool result = video_stream_.try_pop(packet);
+ if(result)
+ cond_.notify_one();
+
+ graph_->set_value("video-buffer", std::min(1.0, static_cast<double>(video_stream_.size()/MIN_FRAMES)));
+
+ return result;
+ }
+
+ bool try_pop_audio(std::shared_ptr<AVPacket>& packet)
+ {
+ bool result = audio_stream_.try_pop(packet);
+ if(result)
+ cond_.notify_one();
+
+ graph_->set_value("audio-buffer", std::min(1.0, static_cast<double>(audio_stream_.size()/MIN_FRAMES)));
+
+ return result;
+ }
+
+ void seek(uint32_t target)
+ {
+ {
+ boost::lock_guard<boost::mutex> lock(mutex_);
+
+ seek_target_ = target;
+ video_stream_.clear();
+ audio_stream_.clear();
+ }
+
+ cond_.notify_one();
+ }
+
+ std::wstring print() const
+ {
+ return L"ffmpeg_input[" + filename_ + L")]";
+ }
+
+private:
+ void internal_seek(uint32_t target)
+ {
+ graph_->set_tag("seek");
+
+ CASPAR_LOG(debug) << print() << " Seeking: " << target;
+
+ int flags = AVSEEK_FLAG_FRAME;
+ if(target == 0)
+ {
+ // Fix VP6 seeking
+ int vid_stream_index = av_find_best_stream(format_context_.get(), AVMEDIA_TYPE_VIDEO, -1, -1, 0, 0);
+ if(vid_stream_index >= 0)
+ {
+ auto codec_id = format_context_->streams[vid_stream_index]->codec->codec_id;
+ if(codec_id == CODEC_ID_VP6A || codec_id == CODEC_ID_VP6F || codec_id == CODEC_ID_VP6)
+ flags = AVSEEK_FLAG_BYTE;
+ }
+ }
+
+ auto stream = format_context_->streams[default_stream_index_];
+ auto codec = stream->codec;
+ auto fixed_target = (target*stream->time_base.den*codec->time_base.num)/(stream->time_base.num*codec->time_base.den)*codec->ticks_per_frame;
+
+ THROW_ON_ERROR2(avformat_seek_file(format_context_.get(), default_stream_index_, std::numeric_limits<int64_t>::min(), fixed_target, fixed_target, 0), print());
+
+ video_stream_.push(nullptr);
+ audio_stream_.push(nullptr);
+ }
+
+ void tick()
+ {
+ if(seek_target_)
+ {
+ internal_seek(*seek_target_);
+ seek_target_.reset();
+ }
+
+ auto packet = create_packet();
+
+ 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.
+
+ if(is_eof(ret))
+ {
+ video_stream_.push(packet);
+ audio_stream_.push(packet);
+
+ if(loop_)
+ internal_seek(start_);
+ }
+ else
+ {
+ THROW_ON_ERROR(ret, "av_read_frame", print());
+
+ THROW_ON_ERROR2(av_dup_packet(packet.get()), print());
+
+ // Make sure that the packet is correctly deallocated even if size and data is modified during decoding.
+ const auto size = packet->size;
+ const auto data = packet->data;
+
+ packet = spl::shared_ptr<AVPacket>(packet.get(), [packet, size, data](AVPacket*)
+ {
+ packet->size = size;
+ packet->data = data;
+ });
+
+ const auto stream_time_base = format_context_->streams[packet->stream_index]->time_base;
+ const auto packet_frame_number = static_cast<uint32_t>((static_cast<double>(packet->pts * stream_time_base.num)/stream_time_base.den)*fps_);
+
+ if(packet->stream_index == default_stream_index_)
+ frame_number_ = packet_frame_number;
+
+ if(packet_frame_number >= start_ && packet_frame_number < length_)
+ {
+ video_stream_.push(packet);
+ audio_stream_.push(packet);
+ }
+ }
+
+ graph_->set_value("video-buffer", std::min(1.0, static_cast<double>(video_stream_.size()/MIN_FRAMES)));
+ graph_->set_value("audio-buffer", std::min(1.0, static_cast<double>(audio_stream_.size()/MIN_FRAMES)));
+ }
+
+ bool full() const
+ {
+ return video_stream_.size() > MIN_FRAMES && audio_stream_.size() > MIN_FRAMES;
+ }
+
+ void run()
+ {
+ win32_exception::install_handler();
+
+ while(is_running_)
+ {
+ try
+ {
+ boost::this_thread::sleep(boost::posix_time::milliseconds(1));
+
+ {
+ boost::unique_lock<boost::mutex> lock(mutex_);
+
+ while(full() && !seek_target_ && is_running_)
+ cond_.wait(lock);
+
+ tick();
+ }
+ }
+ catch(...)
+ {
+ CASPAR_LOG_CURRENT_EXCEPTION();
+ is_running_ = false;
+ }
+ }
+ }
+
+ bool is_eof(int ret)
+ {
+ #pragma warning (disable : 4146)
+ return ret == AVERROR_EOF || ret == AVERROR(EIO) || frame_number_ >= length_; // av_read_frame doesn't always correctly return AVERROR_EOF;
+ }
+};
+
+input::input(const spl::shared_ptr<diagnostics::graph>& graph, const std::wstring& filename, bool loop, uint32_t start, uint32_t length)
+ : impl_(new impl(graph, filename, loop, start, length)){}
+bool input::try_pop_video(std::shared_ptr<AVPacket>& packet){return impl_->try_pop_video(packet);}
+bool input::try_pop_audio(std::shared_ptr<AVPacket>& packet){return impl_->try_pop_audio(packet);}
+AVFormatContext& input::context(){return *impl_->format_context_;}
+void input::loop(bool value){impl_->loop_ = value;}
+bool input::loop() const{return impl_->loop_;}
+void input::seek(uint32_t target){impl_->seek(target);}
+void input::start(uint32_t value){impl_->start_ = value;}
+uint32_t input::start() const{return impl_->start_;}
+void input::length(uint32_t value){impl_->length_ = value;}
+uint32_t input::length() const{return impl_->length_;}
+}}
projects / casparcg / blobdiff