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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 TEST_TESTSUPPORT_FRAME_READER_H_
#define TEST_TESTSUPPORT_FRAME_READER_H_
#include <stdio.h>
#include <string>
#include "absl/types/optional.h"
#include "api/scoped_refptr.h"
namespace webrtc {
class I420Buffer;
namespace test {
// Handles reading of I420 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 from the input file. On success, returns the frame.
// Returns nullptr if encountering end of file or a read error.
virtual rtc::scoped_refptr<I420Buffer> ReadFrame() = 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 size_t FrameLength() = 0;
// Total number of frames in the input video source.
virtual int NumberOfFrames() = 0;
};
class YuvFrameReaderImpl : public FrameReader {
public:
enum class RepeatMode { kSingle, kRepeat, kPingPong };
class DropperUtil {
public:
DropperUtil(int source_fps, int target_fps);
enum class DropDecision { kDropframe, kKeepFrame };
DropDecision UpdateLevel();
private:
const double frame_size_buckets_;
double bucket_level_;
};
// Creates a file handler. The input file is assumed to exist and be readable.
// Parameters:
// input_filename The file to read from.
// width, height Size of each frame to read.
YuvFrameReaderImpl(std::string input_filename, int width, int height);
YuvFrameReaderImpl(std::string input_filename,
int input_width,
int input_height,
int desired_width,
int desired_height,
RepeatMode repeat_mode,
absl::optional<int> clip_fps,
int target_fps);
~YuvFrameReaderImpl() override;
bool Init() override;
rtc::scoped_refptr<I420Buffer> ReadFrame() override;
void Close() override;
size_t FrameLength() override;
int NumberOfFrames() override;
protected:
const std::string input_filename_;
// It is not const, so subclasses will be able to add frame header size.
size_t frame_length_in_bytes_;
const int input_width_;
const int input_height_;
const int desired_width_;
const int desired_height_;
const size_t frame_size_bytes_;
const RepeatMode repeat_mode_;
int number_of_frames_;
int current_frame_index_;
std::unique_ptr<DropperUtil> dropper_;
FILE* input_file_;
};
class Y4mFrameReaderImpl : public YuvFrameReaderImpl {
public:
// Creates a file handler. The input file is assumed to exist and be readable.
// Parameters:
// input_filename The file to read from.
// width, height Size of each frame to read.
Y4mFrameReaderImpl(std::string input_filename, int width, int height);
~Y4mFrameReaderImpl() override;
bool Init() override;
rtc::scoped_refptr<I420Buffer> ReadFrame() override;
private:
// Buffer that is used to read file and frame headers.
uint8_t* buffer_;
};
} // namespace test
} // namespace webrtc
#endif // TEST_TESTSUPPORT_FRAME_READER_H_
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