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 VPX_TEST_IVF_VIDEO_SOURCE_H_
11 #define VPX_TEST_IVF_VIDEO_SOURCE_H_
12 #include <cstdio>
13 #include <cstdlib>
14 #include <new>
15 #include <string>
16 #include "test/video_source.h"
17
18 namespace libvpx_test {
19 const unsigned int kCodeBufferSize = 256 * 1024 * 1024;
20 const unsigned int kIvfFileHdrSize = 32;
21 const unsigned int kIvfFrameHdrSize = 12;
22
MemGetLe32(const uint8_t * mem)23 static 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.
29 class IVFVideoSource : public CompressedVideoSource {
30 public:
IVFVideoSource(const std::string & file_name)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
~IVFVideoSource()35 virtual ~IVFVideoSource() {
36 delete[] compressed_frame_buf_;
37
38 if (input_file_) fclose(input_file_);
39 }
40
Init()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
Begin()48 virtual void Begin() {
49 input_file_ = OpenTestDataFile(file_name_);
50 ASSERT_TRUE(input_file_ != NULL)
51 << "Input file open failed. Filename: " << 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
Next()65 virtual void Next() {
66 ++frame_;
67 FillFrame();
68 }
69
FillFrame()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
cxdata()89 virtual const uint8_t *cxdata() const {
90 return end_of_file_ ? NULL : compressed_frame_buf_;
91 }
frame_size()92 virtual size_t frame_size() const { return frame_sz_; }
frame_number()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 // VPX_TEST_IVF_VIDEO_SOURCE_H_
107