/*
-* Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>
+* Copyright 2013 Sveriges Television AB http://casparcg.com/
*
* This file is part of CasparCG (www.casparcg.com).
*
#include "video_decoder.h"
#include "../util/util.h"
-#include "../input/input.h"
#include "../../ffmpeg_error.h"
-#include <common/log.h>
#include <core/frame/frame_transform.h>
#include <core/frame/frame_factory.h>
+#include <boost/range/algorithm_ext/push_back.hpp>
#include <boost/filesystem.hpp>
#include <queue>
namespace caspar { namespace ffmpeg {
-struct video_decoder::impl : boost::noncopyable
+struct video_decoder::implementation : boost::noncopyable
{
- core::monitor::subject monitor_subject_;
- input* input_;
- int index_;
+ int index_ = -1;
const spl::shared_ptr<AVCodecContext> codec_context_;
std::queue<spl::shared_ptr<AVPacket>> packets_;
- const AVStream* stream_;
const uint32_t nb_frames_;
- const int width_;
- const int height_;
+ const int width_ = codec_context_->width;
+ const int height_ = codec_context_->height;
bool is_progressive_;
- uint32_t file_frame_number_;
- double fps_;
-
- std::shared_ptr<AVPacket> current_packet_;
+
+ tbb::atomic<uint32_t> file_frame_number_;
public:
- explicit impl(input& in, bool single_threaded)
- : input_(&in)
- , codec_context_(open_codec(input_->context(), AVMEDIA_TYPE_VIDEO, index_, single_threaded))
- , stream_(input_->context().streams[index_])
- , nb_frames_(static_cast<uint32_t>(stream_->nb_frames))
- , width_(codec_context_->width)
- , height_(codec_context_->height)
- , file_frame_number_(0)
- , fps_(read_fps(input_->context(), 0.0))
+ explicit implementation(const spl::shared_ptr<AVFormatContext>& context)
+ : codec_context_(open_codec(*context, AVMEDIA_TYPE_VIDEO, index_, false))
+ , nb_frames_(static_cast<uint32_t>(context->streams[index_]->nb_frames))
{
+ file_frame_number_ = 0;
+
+ codec_context_->refcounted_frames = 1;
}
-
+
+ void push(const std::shared_ptr<AVPacket>& packet)
+ {
+ if(!packet)
+ return;
+
+ if(packet->stream_index == index_ || packet->data == nullptr)
+ packets_.push(spl::make_shared_ptr(packet));
+ }
+
std::shared_ptr<AVFrame> poll()
- {
- if(!current_packet_ && !input_->try_pop_video(current_packet_))
+ {
+ if(packets_.empty())
return nullptr;
- std::shared_ptr<AVFrame> frame;
-
- if(!current_packet_)
- {
- avcodec_flush_buffers(codec_context_.get());
+ auto packet = packets_.front();
+
+ if(packet->data == nullptr)
+ {
+ if(codec_context_->codec->capabilities & CODEC_CAP_DELAY)
+ {
+ auto video = decode(packet);
+ if(video)
+ return video;
+ }
+
+ packets_.pop();
+ file_frame_number_ = static_cast<uint32_t>(packet->pos);
+ avcodec_flush_buffers(codec_context_.get());
+ return flush_video();
}
- else if(!current_packet_->data)
- {
- if(codec_context_->codec->capabilities & CODEC_CAP_DELAY)
- frame = decode(*current_packet_);
-
- if(!frame)
- current_packet_.reset();
- }
- else
- {
- frame = decode(*current_packet_);
- if(current_packet_->size == 0)
- current_packet_.reset();
- }
-
- return frame;
+ packets_.pop();
+ return decode(packet);
}
- std::shared_ptr<AVFrame> decode(AVPacket& pkt)
+ std::shared_ptr<AVFrame> decode(spl::shared_ptr<AVPacket> pkt)
{
- auto frame = create_frame();
-
- int got_frame = 0;
- auto len = THROW_ON_ERROR2(avcodec_decode_video2(codec_context_.get(), frame.get(), &got_frame, &pkt), "[video_decocer]");
-
- if(len == 0)
+ auto decoded_frame = std::shared_ptr<AVFrame>(av_frame_alloc(), [](AVFrame* frame)
{
- pkt.size = 0;
- return nullptr;
- }
-
- pkt.data += len;
- pkt.size -= len;
+ av_frame_free(&frame);
+ });
+
+ int frame_finished = 0;
+ THROW_ON_ERROR2(avcodec_decode_video2(codec_context_.get(), decoded_frame.get(), &frame_finished, pkt.get()), "[video_decoder]");
+
+ // If a decoder consumes less then the whole packet then something is wrong
+ // that might be just harmless padding at the end, or a problem with the
+ // AVParser or demuxer which puted more then one frame in a AVPacket.
- if(got_frame == 0)
+ if(frame_finished == 0)
return nullptr;
-
- auto stream_time_base = stream_->time_base;
- auto packet_frame_number = static_cast<uint32_t>((static_cast<double>(pkt.pts * stream_time_base.num) / stream_time_base.den) * fps_);
- file_frame_number_ = packet_frame_number;
+ is_progressive_ = !decoded_frame->interlaced_frame;
- is_progressive_ = !frame->interlaced_frame;
-
- if(frame->repeat_pict > 0)
- CASPAR_LOG(warning) << "[video_decoder] repeat_pict not implemented.";
-
- monitor_subject_ << core::monitor::message("/file/video/width") % width_
- << core::monitor::message("/file/video/height") % height_
- << core::monitor::message("/file/video/field") % u8(!frame->interlaced_frame ? "progressive" : (frame->top_field_first ? "upper" : "lower"))
- << core::monitor::message("/file/video/codec") % u8(codec_context_->codec->long_name);
+ if(decoded_frame->repeat_pict > 0)
+ CASPAR_LOG(warning) << "[video_decoder] Field repeat_pict not implemented.";
- return frame;
+ ++file_frame_number_;
+
+ // This ties the life of the decoded_frame to the packet that it came from. For the
+ // current version of ffmpeg (0.8 or c17808c) the RAW_VIDEO codec returns frame data
+ // owned by the packet.
+ return std::shared_ptr<AVFrame>(decoded_frame.get(), [decoded_frame, pkt](AVFrame*){});
}
+ bool ready() const
+ {
+ return packets_.size() >= 8;
+ }
+
uint32_t nb_frames() const
{
- return std::max(nb_frames_, file_frame_number_);
+ return std::max(nb_frames_, static_cast<uint32_t>(file_frame_number_));
}
std::wstring print() const
}
};
-video_decoder::video_decoder(input& in, bool single_threaded) : impl_(new impl(in, single_threaded)){}
-video_decoder::video_decoder(video_decoder&& other) : impl_(std::move(other.impl_)){}
-video_decoder& video_decoder::operator=(video_decoder&& other){impl_ = std::move(other.impl_); return *this;}
-std::shared_ptr<AVFrame> video_decoder::operator()(){return impl_->poll();}
+video_decoder::video_decoder(const spl::shared_ptr<AVFormatContext>& context) : impl_(new implementation(context)){}
+void video_decoder::push(const std::shared_ptr<AVPacket>& packet){impl_->push(packet);}
+std::shared_ptr<AVFrame> video_decoder::poll(){return impl_->poll();}
+bool video_decoder::ready() const{return impl_->ready();}
int video_decoder::width() const{return impl_->width_;}
int video_decoder::height() const{return impl_->height_;}
uint32_t video_decoder::nb_frames() const{return impl_->nb_frames();}
-uint32_t video_decoder::file_frame_number() const{return impl_->file_frame_number_;}
-bool video_decoder::is_progressive() const{return impl_->is_progressive_;}
+uint32_t video_decoder::file_frame_number() const{return static_cast<uint32_t>(impl_->file_frame_number_);}
+bool video_decoder::is_progressive() const{return impl_->is_progressive_;}
std::wstring video_decoder::print() const{return impl_->print();}
-core::monitor::subject& video_decoder::monitor_output() { return impl_->monitor_subject_; }
+
}}
projects / casparcg / blobdiff