Éanna Ó Catháin | 919c14e | 2020-09-14 17:36:49 +0100 | [diff] [blame] | 1 | // |
| 2 | // Copyright © 2020 Arm Ltd and Contributors. All rights reserved. |
| 3 | // SPDX-License-Identifier: MIT |
| 4 | // |
| 5 | |
| 6 | |
| 7 | #include "CvVideoFrameReader.hpp" |
| 8 | |
Éanna Ó Catháin | c6ab02a | 2021-04-07 14:35:25 +0100 | [diff] [blame] | 9 | namespace common |
Éanna Ó Catháin | 919c14e | 2020-09-14 17:36:49 +0100 | [diff] [blame] | 10 | { |
| 11 | |
| 12 | std::shared_ptr<cv::Mat> CvVideoFrameReader::ReadFrame() |
| 13 | { |
| 14 | // opencv copies data anyway |
| 15 | cv::Mat captureFrame; |
| 16 | m_capture.read(captureFrame); |
| 17 | return std::make_shared<cv::Mat>(std::move(captureFrame)); |
| 18 | } |
| 19 | |
| 20 | bool CvVideoFrameReader::IsExhausted(const std::shared_ptr<cv::Mat>& frame) const |
| 21 | { |
| 22 | assert(frame!=nullptr); |
| 23 | return frame->empty(); |
| 24 | } |
| 25 | |
| 26 | void CvVideoFrameReader::CheckIsOpen(const std::string& source) |
| 27 | { |
| 28 | if (!m_capture.isOpened()) |
| 29 | { |
| 30 | throw std::runtime_error("Failed to open video capture for the source = " + source); |
| 31 | } |
| 32 | } |
| 33 | |
| 34 | void CvVideoFrameReader::Init(const std::string& source) |
| 35 | { |
| 36 | m_capture.open(source); |
| 37 | CheckIsOpen(source); |
| 38 | } |
| 39 | |
| 40 | int CvVideoFrameReader::GetSourceWidth() const |
| 41 | { |
| 42 | return static_cast<int>(lround(m_capture.get(cv::CAP_PROP_FRAME_WIDTH))); |
| 43 | } |
| 44 | |
| 45 | int CvVideoFrameReader::GetSourceHeight() const |
| 46 | { |
| 47 | return static_cast<int>(lround(m_capture.get(cv::CAP_PROP_FRAME_HEIGHT))); |
| 48 | } |
| 49 | |
| 50 | double CvVideoFrameReader::GetSourceFps() const |
| 51 | { |
| 52 | return m_capture.get(cv::CAP_PROP_FPS); |
| 53 | } |
| 54 | |
| 55 | bool CvVideoFrameReader::ConvertToRGB() |
| 56 | { |
| 57 | m_capture.set(cv::CAP_PROP_CONVERT_RGB, 1.0); |
| 58 | return static_cast<bool>(m_capture.get(cv::CAP_PROP_CONVERT_RGB)); |
| 59 | } |
| 60 | |
| 61 | std::string CvVideoFrameReader::GetSourceEncoding() const |
| 62 | { |
| 63 | char fourccStr[5]; |
| 64 | auto fourcc = (int)m_capture.get(cv::CAP_PROP_FOURCC); |
| 65 | sprintf(fourccStr,"%c%c%c%c",fourcc & 0xFF, (fourcc >> 8) & 0xFF, (fourcc >> 16) & 0xFF, (fourcc >> 24) & 0xFF); |
| 66 | return fourccStr; |
| 67 | } |
| 68 | |
| 69 | int CvVideoFrameReader::GetSourceEncodingInt() const |
| 70 | { |
| 71 | return (int)m_capture.get(cv::CAP_PROP_FOURCC); |
| 72 | } |
| 73 | |
| 74 | int CvVideoFrameReader::GetFrameCount() const |
| 75 | { |
| 76 | return static_cast<int>(lround(m_capture.get(cv::CAP_PROP_FRAME_COUNT))); |
| 77 | }; |
| 78 | |
| 79 | std::shared_ptr<cv::Mat> CvVideoFrameReaderRgbWrapper::ReadFrame() |
| 80 | { |
| 81 | auto framePtr = m_reader->ReadFrame(); |
| 82 | if (!IsExhausted(framePtr)) |
| 83 | { |
| 84 | cv::cvtColor(*framePtr, *framePtr, cv::COLOR_BGR2RGB); |
| 85 | } |
| 86 | return framePtr; |
| 87 | } |
| 88 | |
| 89 | bool CvVideoFrameReaderRgbWrapper::IsExhausted(const std::shared_ptr<cv::Mat>& frame) const |
| 90 | { |
| 91 | return m_reader->IsExhausted(frame); |
| 92 | } |
| 93 | |
Éanna Ó Catháin | c6ab02a | 2021-04-07 14:35:25 +0100 | [diff] [blame] | 94 | CvVideoFrameReaderRgbWrapper::CvVideoFrameReaderRgbWrapper(std::unique_ptr<common::CvVideoFrameReader> reader): |
Éanna Ó Catháin | 919c14e | 2020-09-14 17:36:49 +0100 | [diff] [blame] | 95 | m_reader(std::move(reader)) |
| 96 | {} |
| 97 | |
Éanna Ó Catháin | c6ab02a | 2021-04-07 14:35:25 +0100 | [diff] [blame] | 98 | }// namespace common |