blob: 6008d1ef1666b43f91b0ec270ca56c9ce67c1123 [file] [log] [blame]
/*
* Copyright (c) 2018 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 "api/scoped_refptr.h"
#include "api/video/i420_buffer.h"
#include "test/testsupport/file_utils.h"
#include "test/testsupport/frame_reader.h"
namespace webrtc {
namespace test {
namespace {
// Size of header: "YUV4MPEG2 W50 H20 F30:1 C420\n"
const size_t kFileHeaderSize = 29;
// Size of header: "FRAME\n"
const size_t kFrameHeaderSize = 6;
} // namespace
Y4mFrameReaderImpl::Y4mFrameReaderImpl(std::string input_filename,
int width,
int height)
: YuvFrameReaderImpl(input_filename, width, height) {
frame_length_in_bytes_ += kFrameHeaderSize;
buffer_ = new uint8_t[kFileHeaderSize];
}
Y4mFrameReaderImpl::~Y4mFrameReaderImpl() {
delete[] buffer_;
}
bool Y4mFrameReaderImpl::Init() {
if (width_ <= 0 || height_ <= 0) {
fprintf(stderr, "Frame width and height must be >0, was %d x %d\n", width_,
height_);
return false;
}
input_file_ = fopen(input_filename_.c_str(), "rb");
if (input_file_ == nullptr) {
fprintf(stderr, "Couldn't open input file for reading: %s\n",
input_filename_.c_str());
return false;
}
size_t source_file_size = GetFileSize(input_filename_);
if (source_file_size <= 0u) {
fprintf(stderr, "Found empty file: %s\n", input_filename_.c_str());
return false;
}
if (fread(buffer_, 1, kFileHeaderSize, input_file_) < kFileHeaderSize) {
fprintf(stderr, "Failed to read file header from input file: %s\n",
input_filename_.c_str());
return false;
}
// Calculate total number of frames.
number_of_frames_ = static_cast<int>((source_file_size - kFileHeaderSize) /
frame_length_in_bytes_);
return true;
}
rtc::scoped_refptr<I420Buffer> Y4mFrameReaderImpl::ReadFrame() {
if (input_file_ == nullptr) {
fprintf(stderr,
"Y4mFrameReaderImpl is not initialized (input file is NULL)\n");
return nullptr;
}
if (fread(buffer_, 1, kFrameHeaderSize, input_file_) < kFrameHeaderSize &&
ferror(input_file_)) {
fprintf(stderr, "Failed to read frame header from input file: %s\n",
input_filename_.c_str());
return nullptr;
}
return YuvFrameReaderImpl::ReadFrame();
}
} // namespace test
} // namespace webrtc