1/* 2 * Copyright (c) 2012 The WebM project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10#ifndef TEST_IVF_VIDEO_SOURCE_H_ 11#define TEST_IVF_VIDEO_SOURCE_H_ 12#include <cstdio> 13#include <cstdlib> 14#include <new> 15#include <string> 16#include "test/video_source.h" 17 18namespace libvpx_test { 19const unsigned int kCodeBufferSize = 256 * 1024; 20const unsigned int kIvfFileHdrSize = 32; 21const unsigned int kIvfFrameHdrSize = 12; 22 23static unsigned int MemGetLe32(const uint8_t *mem) { 24 return (mem[3] << 24) | (mem[2] << 16) | (mem[1] << 8) | (mem[0]); 25} 26 27// This class extends VideoSource to allow parsing of ivf files, 28// so that we can do actual file decodes. 29class IVFVideoSource : public CompressedVideoSource { 30 public: 31 explicit IVFVideoSource(const std::string &file_name) 32 : file_name_(file_name), input_file_(NULL), compressed_frame_buf_(NULL), 33 frame_sz_(0), frame_(0), end_of_file_(false) {} 34 35 virtual ~IVFVideoSource() { 36 delete[] compressed_frame_buf_; 37 38 if (input_file_) fclose(input_file_); 39 } 40 41 virtual void Init() { 42 // Allocate a buffer for read in the compressed video frame. 43 compressed_frame_buf_ = new uint8_t[libvpx_test::kCodeBufferSize]; 44 ASSERT_TRUE(compressed_frame_buf_ != NULL) 45 << "Allocate frame buffer failed"; 46 } 47 48 virtual void Begin() { 49 input_file_ = OpenTestDataFile(file_name_); 50 ASSERT_TRUE(input_file_ != NULL) << "Input file open failed. Filename: " 51 << file_name_; 52 53 // Read file header 54 uint8_t file_hdr[kIvfFileHdrSize]; 55 ASSERT_EQ(kIvfFileHdrSize, fread(file_hdr, 1, kIvfFileHdrSize, input_file_)) 56 << "File header read failed."; 57 // Check file header 58 ASSERT_TRUE(file_hdr[0] == 'D' && file_hdr[1] == 'K' && 59 file_hdr[2] == 'I' && file_hdr[3] == 'F') 60 << "Input is not an IVF file."; 61 62 FillFrame(); 63 } 64 65 virtual void Next() { 66 ++frame_; 67 FillFrame(); 68 } 69 70 void FillFrame() { 71 ASSERT_TRUE(input_file_ != NULL); 72 uint8_t frame_hdr[kIvfFrameHdrSize]; 73 // Check frame header and read a frame from input_file. 74 if (fread(frame_hdr, 1, kIvfFrameHdrSize, input_file_) != 75 kIvfFrameHdrSize) { 76 end_of_file_ = true; 77 } else { 78 end_of_file_ = false; 79 80 frame_sz_ = MemGetLe32(frame_hdr); 81 ASSERT_LE(frame_sz_, kCodeBufferSize) 82 << "Frame is too big for allocated code buffer"; 83 ASSERT_EQ(frame_sz_, 84 fread(compressed_frame_buf_, 1, frame_sz_, input_file_)) 85 << "Failed to read complete frame"; 86 } 87 } 88 89 virtual const uint8_t *cxdata() const { 90 return end_of_file_ ? NULL : compressed_frame_buf_; 91 } 92 virtual size_t frame_size() const { return frame_sz_; } 93 virtual unsigned int frame_number() const { return frame_; } 94 95 protected: 96 std::string file_name_; 97 FILE *input_file_; 98 uint8_t *compressed_frame_buf_; 99 size_t frame_sz_; 100 unsigned int frame_; 101 bool end_of_file_; 102}; 103 104} // namespace libvpx_test 105 106#endif // TEST_IVF_VIDEO_SOURCE_H_ 107