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/*
* Copyright (c) 2012 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_WRITER_H_
#define TEST_TESTSUPPORT_FRAME_WRITER_H_
#include <stdio.h>
#include <string>
#include "api/video/video_frame.h"
namespace webrtc {
namespace test {
// Handles writing of video files.
class FrameWriter {
public:
virtual ~FrameWriter() {}
// Initializes the file handler, i.e. opens the input and output files etc.
// This must be called before reading or writing frames has started.
// Returns false if an error has occurred, in addition to printing to stderr.
virtual bool Init() = 0;
// Writes a frame of the configured frame length to the output file.
// Returns true if the write was successful, false otherwise.
virtual bool WriteFrame(const uint8_t* frame_buffer) = 0;
// Closes the output 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;
};
// Writes raw I420 frames in sequence.
class YuvFrameWriterImpl : public FrameWriter {
public:
// Creates a file handler. The input file is assumed to exist and be readable
// and the output file must be writable.
// Parameters:
// output_filename The file to write. Will be overwritten if already
// existing.
// width, height Size of each frame to read.
YuvFrameWriterImpl(std::string output_filename, int width, int height);
~YuvFrameWriterImpl() override;
bool Init() override;
bool WriteFrame(const uint8_t* frame_buffer) override;
void Close() override;
size_t FrameLength() override;
protected:
const std::string output_filename_;
size_t frame_length_in_bytes_;
const int width_;
const int height_;
FILE* output_file_;
};
// Writes raw I420 frames in sequence, but with Y4M file and frame headers for
// more convenient playback in external media players.
class Y4mFrameWriterImpl : public YuvFrameWriterImpl {
public:
Y4mFrameWriterImpl(std::string output_filename,
int width,
int height,
int frame_rate);
~Y4mFrameWriterImpl() override;
bool Init() override;
bool WriteFrame(const uint8_t* frame_buffer) override;
private:
const int frame_rate_;
};
// LibJpeg is not available on iOS. This class will do nothing on iOS.
class JpegFrameWriter {
public:
JpegFrameWriter(const std::string& output_filename);
// Quality can be from 0 (worst) to 100 (best). Best quality is still lossy.
// WriteFrame can be called only once. Subsequent calls will fail.
bool WriteFrame(const VideoFrame& input_frame, int quality);
#if !defined(WEBRTC_IOS)
private:
bool frame_written_;
const std::string output_filename_;
FILE* output_file_;
#endif
};
} // namespace test
} // namespace webrtc
#endif // TEST_TESTSUPPORT_FRAME_WRITER_H_