113 lines
3.2 KiB
C++
113 lines
3.2 KiB
C++
/* This file is part of the Pangolin Project.
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* http://github.com/stevenlovegrove/Pangolin
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*
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* Copyright (c) 2014 Steven Lovegrove
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#pragma once
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#include <pangolin/pangolin.h>
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#include <pangolin/video/video.h>
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#include <memory>
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#include <pangolin/utils/fix_size_buffer_queue.h>
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namespace pangolin
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{
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// Video class that creates a thread that keeps pulling frames and processing from its children.
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class PANGOLIN_EXPORT ThreadVideo : public VideoInterface, public VideoPropertiesInterface,
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public BufferAwareVideoInterface, public VideoFilterInterface
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{
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public:
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ThreadVideo(std::unique_ptr<VideoInterface>& videoin, size_t num_buffers);
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~ThreadVideo();
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//! Implement VideoInput::Start()
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void Start();
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//! Implement VideoInput::Stop()
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void Stop();
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//! Implement VideoInput::SizeBytes()
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size_t SizeBytes() const;
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//! Implement VideoInput::Streams()
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const std::vector<StreamInfo>& Streams() const;
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//! Implement VideoInput::GrabNext()
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bool GrabNext( unsigned char* image, bool wait = true );
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//! Implement VideoInput::GrabNewest()
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bool GrabNewest( unsigned char* image, bool wait = true );
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const picojson::value& DeviceProperties() const;
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const picojson::value& FrameProperties() const;
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uint32_t AvailableFrames() const;
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bool DropNFrames(uint32_t n);
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void operator()();
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std::vector<VideoInterface*>& InputStreams();
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protected:
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struct GrabResult
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{
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GrabResult(const size_t buffer_size)
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: return_status(false),
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buffer(new unsigned char[buffer_size])
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{
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}
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// No copy constructor.
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GrabResult(const GrabResult& o) = delete;
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// Default move constructor
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GrabResult(GrabResult&& o) = default;
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bool return_status;
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std::unique_ptr<unsigned char[]> buffer;
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picojson::value frame_properties;
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};
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std::unique_ptr<VideoInterface> src;
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std::vector<VideoInterface*> videoin;
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bool quit_grab_thread;
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FixSizeBuffersQueue<GrabResult> queue;
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std::condition_variable cv;
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std::mutex cvMtx;
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std::thread grab_thread;
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mutable picojson::value device_properties;
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picojson::value frame_properties;
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};
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}
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