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_VIDEO_SOURCE_H_
11 #define TEST_VIDEO_SOURCE_H_
12
13 #if defined(_WIN32)
14 #undef NOMINMAX
15 #define NOMINMAX
16 #define WIN32_LEAN_AND_MEAN
17 #include <windows.h>
18 #endif
19 #include <cstdio>
20 #include <cstdlib>
21 #include <string>
22 #include "test/acm_random.h"
23 #include "vpx/vpx_encoder.h"
24
25 namespace libvpx_test {
26
27 // Helper macros to ensure LIBVPX_TEST_DATA_PATH is a quoted string.
28 // These are undefined right below GetDataPath
29 // NOTE: LIBVPX_TEST_DATA_PATH MUST NOT be a quoted string before
30 // Stringification or the GetDataPath will fail at runtime
31 #define TO_STRING(S) #S
32 #define STRINGIFY(S) TO_STRING(S)
33
34 // A simple function to encapsulate cross platform retrieval of test data path
GetDataPath()35 static std::string GetDataPath() {
36 const char *const data_path = getenv("LIBVPX_TEST_DATA_PATH");
37 if (data_path == NULL) {
38 #ifdef LIBVPX_TEST_DATA_PATH
39 // In some environments, we cannot set environment variables
40 // Instead, we set the data path by using a preprocessor symbol
41 // which can be set from make files
42 return STRINGIFY(LIBVPX_TEST_DATA_PATH);
43 #else
44 return ".";
45 #endif
46 }
47 return data_path;
48 }
49
50 // Undefining stringification macros because they are not used elsewhere
51 #undef TO_STRING
52 #undef STRINGIFY
53
OpenTestDataFile(const std::string & file_name)54 inline FILE *OpenTestDataFile(const std::string& file_name) {
55 const std::string path_to_source = GetDataPath() + "/" + file_name;
56 return fopen(path_to_source.c_str(), "rb");
57 }
58
GetTempOutFile(std::string * file_name)59 static FILE *GetTempOutFile(std::string *file_name) {
60 file_name->clear();
61 #if defined(_WIN32)
62 char fname[MAX_PATH];
63 char tmppath[MAX_PATH];
64 if (GetTempPathA(MAX_PATH, tmppath)) {
65 // Assume for now that the filename generated is unique per process
66 if (GetTempFileNameA(tmppath, "lvx", 0, fname)) {
67 file_name->assign(fname);
68 return fopen(fname, "wb+");
69 }
70 }
71 return NULL;
72 #else
73 return tmpfile();
74 #endif
75 }
76
77 class TempOutFile {
78 public:
TempOutFile()79 TempOutFile() {
80 file_ = GetTempOutFile(&file_name_);
81 }
~TempOutFile()82 ~TempOutFile() {
83 CloseFile();
84 if (!file_name_.empty()) {
85 EXPECT_EQ(0, remove(file_name_.c_str()));
86 }
87 }
file()88 FILE *file() {
89 return file_;
90 }
file_name()91 const std::string& file_name() {
92 return file_name_;
93 }
94
95 protected:
CloseFile()96 void CloseFile() {
97 if (file_) {
98 fclose(file_);
99 file_ = NULL;
100 }
101 }
102 FILE *file_;
103 std::string file_name_;
104 };
105
106 // Abstract base class for test video sources, which provide a stream of
107 // vpx_image_t images with associated timestamps and duration.
108 class VideoSource {
109 public:
~VideoSource()110 virtual ~VideoSource() {}
111
112 // Prepare the stream for reading, rewind/open as necessary.
113 virtual void Begin() = 0;
114
115 // Advance the cursor to the next frame
116 virtual void Next() = 0;
117
118 // Get the current video frame, or NULL on End-Of-Stream.
119 virtual vpx_image_t *img() const = 0;
120
121 // Get the presentation timestamp of the current frame.
122 virtual vpx_codec_pts_t pts() const = 0;
123
124 // Get the current frame's duration
125 virtual unsigned long duration() const = 0;
126
127 // Get the timebase for the stream
128 virtual vpx_rational_t timebase() const = 0;
129
130 // Get the current frame counter, starting at 0.
131 virtual unsigned int frame() const = 0;
132
133 // Get the current file limit.
134 virtual unsigned int limit() const = 0;
135 };
136
137
138 class DummyVideoSource : public VideoSource {
139 public:
DummyVideoSource()140 DummyVideoSource()
141 : img_(NULL),
142 limit_(100),
143 width_(80),
144 height_(64),
145 format_(VPX_IMG_FMT_I420) {
146 ReallocImage();
147 }
148
~DummyVideoSource()149 virtual ~DummyVideoSource() { vpx_img_free(img_); }
150
Begin()151 virtual void Begin() {
152 frame_ = 0;
153 FillFrame();
154 }
155
Next()156 virtual void Next() {
157 ++frame_;
158 FillFrame();
159 }
160
img()161 virtual vpx_image_t *img() const {
162 return (frame_ < limit_) ? img_ : NULL;
163 }
164
165 // Models a stream where Timebase = 1/FPS, so pts == frame.
pts()166 virtual vpx_codec_pts_t pts() const { return frame_; }
167
duration()168 virtual unsigned long duration() const { return 1; }
169
timebase()170 virtual vpx_rational_t timebase() const {
171 const vpx_rational_t t = {1, 30};
172 return t;
173 }
174
frame()175 virtual unsigned int frame() const { return frame_; }
176
limit()177 virtual unsigned int limit() const { return limit_; }
178
set_limit(unsigned int limit)179 void set_limit(unsigned int limit) {
180 limit_ = limit;
181 }
182
SetSize(unsigned int width,unsigned int height)183 void SetSize(unsigned int width, unsigned int height) {
184 if (width != width_ || height != height_) {
185 width_ = width;
186 height_ = height;
187 ReallocImage();
188 }
189 }
190
SetImageFormat(vpx_img_fmt_t format)191 void SetImageFormat(vpx_img_fmt_t format) {
192 if (format_ != format) {
193 format_ = format;
194 ReallocImage();
195 }
196 }
197
198 protected:
FillFrame()199 virtual void FillFrame() { if (img_) memset(img_->img_data, 0, raw_sz_); }
200
ReallocImage()201 void ReallocImage() {
202 vpx_img_free(img_);
203 img_ = vpx_img_alloc(NULL, format_, width_, height_, 32);
204 raw_sz_ = ((img_->w + 31) & ~31) * img_->h * img_->bps / 8;
205 }
206
207 vpx_image_t *img_;
208 size_t raw_sz_;
209 unsigned int limit_;
210 unsigned int frame_;
211 unsigned int width_;
212 unsigned int height_;
213 vpx_img_fmt_t format_;
214 };
215
216
217 class RandomVideoSource : public DummyVideoSource {
218 public:
219 RandomVideoSource(int seed = ACMRandom::DeterministicSeed())
rnd_(seed)220 : rnd_(seed),
221 seed_(seed) { }
222
223 protected:
224 // Reset the RNG to get a matching stream for the second pass
Begin()225 virtual void Begin() {
226 frame_ = 0;
227 rnd_.Reset(seed_);
228 FillFrame();
229 }
230
231 // 15 frames of noise, followed by 15 static frames. Reset to 0 rather
232 // than holding previous frames to encourage keyframes to be thrown.
FillFrame()233 virtual void FillFrame() {
234 if (img_) {
235 if (frame_ % 30 < 15)
236 for (size_t i = 0; i < raw_sz_; ++i)
237 img_->img_data[i] = rnd_.Rand8();
238 else
239 memset(img_->img_data, 0, raw_sz_);
240 }
241 }
242
243 ACMRandom rnd_;
244 int seed_;
245 };
246
247 // Abstract base class for test video sources, which provide a stream of
248 // decompressed images to the decoder.
249 class CompressedVideoSource {
250 public:
~CompressedVideoSource()251 virtual ~CompressedVideoSource() {}
252
253 virtual void Init() = 0;
254
255 // Prepare the stream for reading, rewind/open as necessary.
256 virtual void Begin() = 0;
257
258 // Advance the cursor to the next frame
259 virtual void Next() = 0;
260
261 virtual const uint8_t *cxdata() const = 0;
262
263 virtual size_t frame_size() const = 0;
264
265 virtual unsigned int frame_number() const = 0;
266 };
267
268 } // namespace libvpx_test
269
270 #endif // TEST_VIDEO_SOURCE_H_
271