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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef WEBRTC_TEST_TESTSUPPORT_FRAME_READER_H_
#define WEBRTC_TEST_TESTSUPPORT_FRAME_READER_H_
#include <cstdio>
#include <string>
#include "typedefs.h"
namespace webrtc {
namespace test {
// Handles reading of frames from video files.
class FrameReader {
public:
virtual ~FrameReader() {}
// Initializes the frame reader, i.e. opens the input file.
// This must be called before reading of frames has started.
// Returns false if an error has occurred, in addition to printing to stderr.
virtual bool Init() = 0;
// Reads a frame into the supplied buffer, which must contain enough space
// for the frame size.
// Returns true if there are more frames to read, false if we've already
// read the last frame (in the previous call).
virtual bool ReadFrame(WebRtc_UWord8* source_buffer) = 0;
// Closes the input file if open. Essentially makes this class impossible
// to use anymore. Will also be invoked by the destructor.
virtual void Close() = 0;
// Frame length in bytes of a single frame image.
virtual int FrameLength() = 0;
// Total number of frames in the input video source.
virtual int NumberOfFrames() = 0;
};
class FrameReaderImpl : public FrameReader {
public:
// Creates a file handler. The input file is assumed to exist and be readable.
// Parameters:
// input_filename The file to read from.
// frame_length_in_bytes The size of each frame.
// For YUV this is 3 * width * height / 2
FrameReaderImpl(std::string input_filename, int frame_length_in_bytes);
virtual ~FrameReaderImpl();
bool Init();
bool ReadFrame(WebRtc_UWord8* source_buffer);
void Close();
int FrameLength() { return frame_length_in_bytes_; }
int NumberOfFrames() { return number_of_frames_; }
private:
std::string input_filename_;
int frame_length_in_bytes_;
int number_of_frames_;
FILE* input_file_;
};
} // namespace test
} // namespace webrtc
#endif // WEBRTC_TEST_TESTSUPPORT_FRAME_READER_H_
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