75 lines
2.4 KiB
C
75 lines
2.4 KiB
C
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/*
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* Copyright (c) 2011 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 WEBRTC_TEST_TESTSUPPORT_FRAME_READER_H_
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#define WEBRTC_TEST_TESTSUPPORT_FRAME_READER_H_
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#include <stdio.h>
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#include <string>
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#include "webrtc/typedefs.h"
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namespace webrtc {
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namespace test {
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// Handles reading of frames from video files.
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class FrameReader {
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public:
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virtual ~FrameReader() {}
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// Initializes the frame reader, i.e. opens the input file.
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// This must be called before reading of frames has started.
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// Returns false if an error has occurred, in addition to printing to stderr.
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virtual bool Init() = 0;
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// Reads a frame into the supplied buffer, which must contain enough space
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// for the frame size.
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// Returns true if there are more frames to read, false if we've already
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// read the last frame (in the previous call).
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virtual bool ReadFrame(uint8_t* source_buffer) = 0;
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// Closes the input file if open. Essentially makes this class impossible
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// to use anymore. Will also be invoked by the destructor.
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virtual void Close() = 0;
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// Frame length in bytes of a single frame image.
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virtual size_t FrameLength() = 0;
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// Total number of frames in the input video source.
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virtual int NumberOfFrames() = 0;
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};
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class FrameReaderImpl : public FrameReader {
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public:
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// Creates a file handler. The input file is assumed to exist and be readable.
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// Parameters:
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// input_filename The file to read from.
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// frame_length_in_bytes The size of each frame.
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// For YUV this is 3 * width * height / 2
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FrameReaderImpl(std::string input_filename, size_t frame_length_in_bytes);
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~FrameReaderImpl() override;
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bool Init() override;
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bool ReadFrame(uint8_t* source_buffer) override;
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void Close() override;
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size_t FrameLength() override;
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int NumberOfFrames() override;
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private:
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std::string input_filename_;
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size_t frame_length_in_bytes_;
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int number_of_frames_;
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FILE* input_file_;
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};
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} // namespace test
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} // namespace webrtc
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#endif // WEBRTC_TEST_TESTSUPPORT_FRAME_READER_H_
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