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