// Helper macros to ensure LIBVPX_TEST_DATA_PATH is a quoted string. // These are undefined right below GetDataPath // NOTE: LIBVPX_TEST_DATA_PATH MUST NOT be a quoted string before // Stringification or the GetDataPath will fail at runtime #define TO_STRING(S) #S #define STRINGIFY(S) TO_STRING(S)
// A simple function to encapsulate cross platform retrieval of test data path static std::string GetDataPath() { const char *const data_path = getenv("LIBVPX_TEST_DATA_PATH");
if (data_path == nullptr) { #ifdef LIBVPX_TEST_DATA_PATH // In some environments, we cannot set environment variables // Instead, we set the data path by using a preprocessor symbol // which can be set from make files return STRINGIFY(LIBVPX_TEST_DATA_PATH); #else return"."; #endif
} return data_path;
}
// Undefining stringification macros because they are not used elsewhere #undef TO_STRING #undef STRINGIFY
static FILE *GetTempOutFile(std::string *file_name, const char *io_mode) {
file_name->clear(); #ifdefined(_WIN32)
char fname[MAX_PATH];
char tmppath[MAX_PATH];
if (GetTempPathA(MAX_PATH, tmppath)) { // Assume for now that the filename generated is unique per process
if (GetTempFileNameA(tmppath, "lvx", 0, fname)) {
file_name->assign(fname); return fopen(fname, io_mode);
}
} return nullptr; #else
std::string temp_dir = testing::TempDir();
if (temp_dir.empty()) return nullptr; // Versions of testing::TempDir() prior to release-1.11.0-214-g5e6a5336 may // use the value of an environment variable without checking for a trailing // path delimiter.
if (temp_dir[temp_dir.size() - 1] != '/') temp_dir += '/'; const char name_template[] = "libvpxtest.XXXXXX";
std::unique_ptr<char[]> temp_file_name(
new char[temp_dir.size() + sizeof(name_template)]);
if (temp_file_name == nullptr) return nullptr;
memcpy(temp_file_name.get(), temp_dir.data(), temp_dir.size());
memcpy(temp_file_name.get() + temp_dir.size(), name_template, sizeof(name_template)); const int fd = mkstemp(temp_file_name.get());
if (fd == -1) return nullptr;
*file_name = temp_file_name.get(); return fdopen(fd, io_mode); #endif
}
// Abstract base class for test video sources, which provide a stream of // vpx_image_t images with associated timestamps and duration. class VideoSource { public: virtual ~VideoSource() {}
// Prepare the stream for reading, rewind/open as necessary. virtualvoid Begin() = 0;
// Advance the cursor to the next frame virtualvoid Next() = 0;
// Get the current video frame, or nullptr on End-Of-Stream. virtual vpx_image_t *img() const = 0;
// Get the presentation timestamp of the current frame. virtual vpx_codec_pts_t pts() const = 0;
// Get the current frame's duration virtualunsigned long duration() const = 0;
// Get the timebase for the stream virtual vpx_rational_t timebase() const = 0;
// Get the current frame counter, starting at 0. virtualunsigned int frame() const = 0;
// Get the current file limit. virtualunsigned int limit() const = 0;
};
class DummyVideoSource : public VideoSource { public:
DummyVideoSource()
: img_(nullptr), limit_(100), width_(80), height_(64),
format_(VPX_IMG_FMT_I420) {
ReallocImage();
}
vpx_image_t *img_;
size_t raw_sz_; unsigned int limit_; unsigned int frame_; unsigned int width_; unsigned int height_;
vpx_img_fmt_t format_;
};
class RandomVideoSource : public DummyVideoSource { public:
RandomVideoSource(int seed = ACMRandom::DeterministicSeed())
: rnd_(seed), seed_(seed) {}
// Reset the RNG to get a matching stream for the second pass void Begin() override {
frame_ = 0;
rnd_.Reset(seed_);
FillFrame();
}
protected: // 15 frames of noise, followed by 15 static frames. Reset to 0 rather // than holding previous frames to encourage keyframes to be thrown. void FillFrame() override {
if (img_) {
if (frame_ % 30 < 15) {
for (size_t i = 0; i < raw_sz_; ++i) img_->img_data[i] = rnd_.Rand8();
} else {
memset(img_->img_data, 0, raw_sz_);
}
}
}
ACMRandom rnd_;
int seed_;
};
// Abstract base class for test video sources, which provide a stream of // decompressed images to the decoder. class CompressedVideoSource { public: virtual ~CompressedVideoSource() {}
virtualvoid Init() = 0;
// Prepare the stream for reading, rewind/open as necessary. virtualvoid Begin() = 0;
// Advance the cursor to the next frame virtualvoid Next() = 0;
virtualconst uint8_t *cxdata() const = 0;
virtual size_t frame_size() const = 0;
virtualunsigned int frame_number() const = 0;
};
} // namespace libvpx_test
#endif// VPX_TEST_VIDEO_SOURCE_H_
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