blob: 9b50ec7bf4ac5df4c71c94cdaaf40fbc02aaf3a9 [file] [log] [blame]
* 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.
#include <stdio.h>
#include <string>
#include "webrtc/typedefs.h"
namespace webrtc {
namespace test {
// Handles reading of frames from video files.
class FrameReader {
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(uint8_t* 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 size_t FrameLength() = 0;
// Total number of frames in the input video source.
virtual int NumberOfFrames() = 0;
class FrameReaderImpl : public FrameReader {
// 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, size_t frame_length_in_bytes);
~FrameReaderImpl() override;
bool Init() override;
bool ReadFrame(uint8_t* source_buffer) override;
void Close() override;
size_t FrameLength() override;
int NumberOfFrames() override;
std::string input_filename_;
size_t frame_length_in_bytes_;
int number_of_frames_;
FILE* input_file_;
} // namespace test
} // namespace webrtc