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),
33        input_file_(NULL),
34        compressed_frame_buf_(NULL),
35        frame_sz_(0),
36        frame_(0),
37        end_of_file_(false) {
38  }
39
40  virtual ~IVFVideoSource() {
41    delete[] compressed_frame_buf_;
42
43    if (input_file_)
44      fclose(input_file_);
45  }
46
47  virtual void Init() {
48    // Allocate a buffer for read in the compressed video frame.
49    compressed_frame_buf_ = new uint8_t[libvpx_test::kCodeBufferSize];
50    ASSERT_TRUE(compressed_frame_buf_ != NULL)
51        << "Allocate frame buffer failed";
52  }
53
54  virtual void Begin() {
55    input_file_ = OpenTestDataFile(file_name_);
56    ASSERT_TRUE(input_file_ != NULL) << "Input file open failed. Filename: "
57        << file_name_;
58
59    // Read file header
60    uint8_t file_hdr[kIvfFileHdrSize];
61    ASSERT_EQ(kIvfFileHdrSize, fread(file_hdr, 1, kIvfFileHdrSize, input_file_))
62        << "File header read failed.";
63    // Check file header
64    ASSERT_TRUE(file_hdr[0] == 'D' && file_hdr[1] == 'K' && file_hdr[2] == 'I'
65                && file_hdr[3] == 'F') << "Input is not an IVF file.";
66
67    FillFrame();
68  }
69
70  virtual void Next() {
71    ++frame_;
72    FillFrame();
73  }
74
75  void FillFrame() {
76    ASSERT_TRUE(input_file_ != NULL);
77    uint8_t frame_hdr[kIvfFrameHdrSize];
78    // Check frame header and read a frame from input_file.
79    if (fread(frame_hdr, 1, kIvfFrameHdrSize, input_file_)
80        != kIvfFrameHdrSize) {
81      end_of_file_ = true;
82    } else {
83      end_of_file_ = false;
84
85      frame_sz_ = MemGetLe32(frame_hdr);
86      ASSERT_LE(frame_sz_, kCodeBufferSize)
87          << "Frame is too big for allocated code buffer";
88      ASSERT_EQ(frame_sz_,
89                fread(compressed_frame_buf_, 1, frame_sz_, input_file_))
90          << "Failed to read complete frame";
91    }
92  }
93
94  virtual const uint8_t *cxdata() const {
95    return end_of_file_ ? NULL : compressed_frame_buf_;
96  }
97  virtual size_t frame_size() const { return frame_sz_; }
98  virtual unsigned int frame_number() const { return frame_; }
99
100 protected:
101  std::string file_name_;
102  FILE *input_file_;
103  uint8_t *compressed_frame_buf_;
104  size_t frame_sz_;
105  unsigned int frame_;
106  bool end_of_file_;
107};
108
109}  // namespace libvpx_test
110
111#endif  // TEST_IVF_VIDEO_SOURCE_H_
112