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Diffstat (limited to 'samples/ObjectDetection/src/CvVideoFrameReader.cpp')
-rw-r--r-- | samples/ObjectDetection/src/CvVideoFrameReader.cpp | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/samples/ObjectDetection/src/CvVideoFrameReader.cpp b/samples/ObjectDetection/src/CvVideoFrameReader.cpp new file mode 100644 index 0000000000..09b5050973 --- /dev/null +++ b/samples/ObjectDetection/src/CvVideoFrameReader.cpp @@ -0,0 +1,98 @@ +// +// Copyright © 2020 Arm Ltd and Contributors. All rights reserved. +// SPDX-License-Identifier: MIT +// + + +#include "CvVideoFrameReader.hpp" + +namespace od +{ + +std::shared_ptr<cv::Mat> CvVideoFrameReader::ReadFrame() +{ + // opencv copies data anyway + cv::Mat captureFrame; + m_capture.read(captureFrame); + return std::make_shared<cv::Mat>(std::move(captureFrame)); +} + +bool CvVideoFrameReader::IsExhausted(const std::shared_ptr<cv::Mat>& frame) const +{ + assert(frame!=nullptr); + return frame->empty(); +} + +void CvVideoFrameReader::CheckIsOpen(const std::string& source) +{ + if (!m_capture.isOpened()) + { + throw std::runtime_error("Failed to open video capture for the source = " + source); + } +} + +void CvVideoFrameReader::Init(const std::string& source) +{ + m_capture.open(source); + CheckIsOpen(source); +} + +int CvVideoFrameReader::GetSourceWidth() const +{ + return static_cast<int>(lround(m_capture.get(cv::CAP_PROP_FRAME_WIDTH))); +} + +int CvVideoFrameReader::GetSourceHeight() const +{ + return static_cast<int>(lround(m_capture.get(cv::CAP_PROP_FRAME_HEIGHT))); +} + +double CvVideoFrameReader::GetSourceFps() const +{ + return m_capture.get(cv::CAP_PROP_FPS); +} + +bool CvVideoFrameReader::ConvertToRGB() +{ + m_capture.set(cv::CAP_PROP_CONVERT_RGB, 1.0); + return static_cast<bool>(m_capture.get(cv::CAP_PROP_CONVERT_RGB)); +} + +std::string CvVideoFrameReader::GetSourceEncoding() const +{ + char fourccStr[5]; + auto fourcc = (int)m_capture.get(cv::CAP_PROP_FOURCC); + sprintf(fourccStr,"%c%c%c%c",fourcc & 0xFF, (fourcc >> 8) & 0xFF, (fourcc >> 16) & 0xFF, (fourcc >> 24) & 0xFF); + return fourccStr; +} + +int CvVideoFrameReader::GetSourceEncodingInt() const +{ + return (int)m_capture.get(cv::CAP_PROP_FOURCC); +} + +int CvVideoFrameReader::GetFrameCount() const +{ + return static_cast<int>(lround(m_capture.get(cv::CAP_PROP_FRAME_COUNT))); +}; + +std::shared_ptr<cv::Mat> CvVideoFrameReaderRgbWrapper::ReadFrame() +{ + auto framePtr = m_reader->ReadFrame(); + if (!IsExhausted(framePtr)) + { + cv::cvtColor(*framePtr, *framePtr, cv::COLOR_BGR2RGB); + } + return framePtr; +} + +bool CvVideoFrameReaderRgbWrapper::IsExhausted(const std::shared_ptr<cv::Mat>& frame) const +{ + return m_reader->IsExhausted(frame); +} + +CvVideoFrameReaderRgbWrapper::CvVideoFrameReaderRgbWrapper(std::unique_ptr<od::CvVideoFrameReader> reader): + m_reader(std::move(reader)) +{} + +}// namespace od
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