| /* |
| * 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 |