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404be7f302
Encapsulate logic for reading .y4m video files in a single class. We currently have spread out logic for opening .y4m files with partial parsing. This CL consolidates this logic into a single class with a well defined interface. Change-Id: Id61673b3c95a0053b30e95b4cf382e1c6b05fc30 Bug: webrtc:9642 Reviewed-on: https://webrtc-review.googlesource.com/94772 Reviewed-by: Patrik Höglund <phoglund@webrtc.org> Reviewed-by: Paulina Hensman <phensman@webrtc.org> Commit-Queue: Magnus Jedvert <magjed@webrtc.org> Cr-Commit-Position: refs/heads/master@{#24398}
99 lines
2.7 KiB
C++
99 lines
2.7 KiB
C++
/*
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* Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef RTC_TOOLS_Y4M_FILE_READER_H_
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#define RTC_TOOLS_Y4M_FILE_READER_H_
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#include <cstdio>
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#include <iterator>
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#include <string>
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#include <vector>
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#include "api/video/video_frame.h"
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#include "rtc_base/refcount.h"
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#include "rtc_base/sequenced_task_checker.h"
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namespace webrtc {
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namespace test {
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// Iterable class representing a sequence of I420 buffers. This class is not
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// thread safe because it is expected to be backed by a file.
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class Video : public rtc::RefCountInterface {
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public:
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class Iterator {
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public:
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typedef int value_type;
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typedef std::ptrdiff_t difference_type;
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typedef int* pointer;
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typedef int& reference;
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typedef std::input_iterator_tag iterator_category;
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Iterator(const rtc::scoped_refptr<const Video>& video, size_t index);
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Iterator(const Iterator& other);
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Iterator(Iterator&& other);
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Iterator& operator=(Iterator&&);
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Iterator& operator=(const Iterator&);
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~Iterator();
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rtc::scoped_refptr<I420BufferInterface> operator*() const;
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bool operator==(const Iterator& other) const;
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bool operator!=(const Iterator& other) const;
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Iterator operator++(int);
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Iterator& operator++();
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private:
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rtc::scoped_refptr<const Video> video_;
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size_t index_;
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};
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Iterator begin() const;
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Iterator end() const;
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virtual size_t number_of_frames() const = 0;
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virtual rtc::scoped_refptr<I420BufferInterface> GetFrame(
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size_t index) const = 0;
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};
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class Y4mFile : public Video {
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public:
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// This function opens the file and reads it as an .y4m file. It returns null
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// on failure. The file will be closed when the returned object is destroyed.
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static rtc::scoped_refptr<Y4mFile> Open(const std::string& file_name);
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size_t number_of_frames() const override;
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rtc::scoped_refptr<I420BufferInterface> GetFrame(
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size_t frame_index) const override;
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int width() const;
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int height() const;
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float fps() const;
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protected:
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Y4mFile(int width,
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int height,
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float fps,
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const std::vector<fpos_t>& frame_positions,
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FILE* file);
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~Y4mFile() override;
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private:
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const int width_;
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const int height_;
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const float fps_;
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const std::vector<fpos_t> frame_positions_;
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const rtc::SequencedTaskChecker thread_checker_;
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FILE* const file_;
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};
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} // namespace test
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} // namespace webrtc
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#endif // RTC_TOOLS_Y4M_FILE_READER_H_
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