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authortrav90 <travawine@palemoon.org>2018-10-15 21:45:30 -0500
committertrav90 <travawine@palemoon.org>2018-10-15 21:45:30 -0500
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Import aom library
This is the reference implementation for the Alliance for Open Media's av1 video code. The commit used was 4d668d7feb1f8abd809d1bca0418570a7f142a36.
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diff --git a/third_party/aom/test/video_source.h b/third_party/aom/test/video_source.h
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+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+#ifndef TEST_VIDEO_SOURCE_H_
+#define TEST_VIDEO_SOURCE_H_
+
+#if defined(_WIN32)
+#undef NOMINMAX
+#define NOMINMAX
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#endif
+#include <cstdio>
+#include <cstdlib>
+#include <string>
+#include "test/acm_random.h"
+#include "aom/aom_encoder.h"
+
+namespace libaom_test {
+
+// Helper macros to ensure LIBAOM_TEST_DATA_PATH is a quoted string.
+// These are undefined right below GetDataPath
+// NOTE: LIBAOM_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("LIBAOM_TEST_DATA_PATH");
+ if (data_path == NULL) {
+#ifdef LIBAOM_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(LIBAOM_TEST_DATA_PATH);
+#else
+ return ".";
+#endif
+ }
+ return data_path;
+}
+
+// Undefining stringification macros because they are not used elsewhere
+#undef TO_STRING
+#undef STRINGIFY
+
+inline FILE *OpenTestDataFile(const std::string &file_name) {
+ const std::string path_to_source = GetDataPath() + "/" + file_name;
+ return fopen(path_to_source.c_str(), "rb");
+}
+
+static FILE *GetTempOutFile(std::string *file_name) {
+ file_name->clear();
+#if defined(_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, "wb+");
+ }
+ }
+ return NULL;
+#else
+ return tmpfile();
+#endif
+}
+
+class TempOutFile {
+ public:
+ TempOutFile() { file_ = GetTempOutFile(&file_name_); }
+ ~TempOutFile() {
+ CloseFile();
+ if (!file_name_.empty()) {
+ EXPECT_EQ(0, remove(file_name_.c_str()));
+ }
+ }
+ FILE *file() { return file_; }
+ const std::string &file_name() { return file_name_; }
+
+ protected:
+ void CloseFile() {
+ if (file_) {
+ fclose(file_);
+ file_ = NULL;
+ }
+ }
+ FILE *file_;
+ std::string file_name_;
+};
+
+// Abstract base class for test video sources, which provide a stream of
+// aom_image_t images with associated timestamps and duration.
+class VideoSource {
+ public:
+ virtual ~VideoSource() {}
+
+ // Prepare the stream for reading, rewind/open as necessary.
+ virtual void Begin() = 0;
+
+ // Advance the cursor to the next frame
+ virtual void Next() = 0;
+
+ // Get the current video frame, or NULL on End-Of-Stream.
+ virtual aom_image_t *img() const = 0;
+
+ // Get the presentation timestamp of the current frame.
+ virtual aom_codec_pts_t pts() const = 0;
+
+ // Get the current frame's duration
+ virtual unsigned long duration() const = 0;
+
+ // Get the timebase for the stream
+ virtual aom_rational_t timebase() const = 0;
+
+ // Get the current frame counter, starting at 0.
+ virtual unsigned int frame() const = 0;
+
+ // Get the current file limit.
+ virtual unsigned int limit() const = 0;
+};
+
+class DummyVideoSource : public VideoSource {
+ public:
+ DummyVideoSource()
+ : img_(NULL), limit_(100), width_(80), height_(64),
+ format_(AOM_IMG_FMT_I420) {
+ ReallocImage();
+ }
+
+ virtual ~DummyVideoSource() { aom_img_free(img_); }
+
+ virtual void Begin() {
+ frame_ = 0;
+ FillFrame();
+ }
+
+ virtual void Next() {
+ ++frame_;
+ FillFrame();
+ }
+
+ virtual aom_image_t *img() const { return (frame_ < limit_) ? img_ : NULL; }
+
+ // Models a stream where Timebase = 1/FPS, so pts == frame.
+ virtual aom_codec_pts_t pts() const { return frame_; }
+
+ virtual unsigned long duration() const { return 1; }
+
+ virtual aom_rational_t timebase() const {
+ const aom_rational_t t = { 1, 30 };
+ return t;
+ }
+
+ virtual unsigned int frame() const { return frame_; }
+
+ virtual unsigned int limit() const { return limit_; }
+
+ void set_limit(unsigned int limit) { limit_ = limit; }
+
+ void SetSize(unsigned int width, unsigned int height) {
+ if (width != width_ || height != height_) {
+ width_ = width;
+ height_ = height;
+ ReallocImage();
+ }
+ }
+
+ void SetImageFormat(aom_img_fmt_t format) {
+ if (format_ != format) {
+ format_ = format;
+ ReallocImage();
+ }
+ }
+
+ protected:
+ virtual void FillFrame() {
+ if (img_) memset(img_->img_data, 0, raw_sz_);
+ }
+
+ void ReallocImage() {
+ aom_img_free(img_);
+ img_ = aom_img_alloc(NULL, format_, width_, height_, 32);
+ raw_sz_ = ((img_->w + 31) & ~31) * img_->h * img_->bps / 8;
+ }
+
+ aom_image_t *img_;
+ size_t raw_sz_;
+ unsigned int limit_;
+ unsigned int frame_;
+ unsigned int width_;
+ unsigned int height_;
+ aom_img_fmt_t format_;
+};
+
+class RandomVideoSource : public DummyVideoSource {
+ public:
+ RandomVideoSource(int seed = ACMRandom::DeterministicSeed())
+ : rnd_(seed), seed_(seed) {}
+
+ protected:
+ // Reset the RNG to get a matching stream for the second pass
+ virtual void Begin() {
+ frame_ = 0;
+ rnd_.Reset(seed_);
+ FillFrame();
+ }
+
+ // 15 frames of noise, followed by 15 static frames. Reset to 0 rather
+ // than holding previous frames to encourage keyframes to be thrown.
+ virtual void FillFrame() {
+ 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() {}
+
+ virtual void Init() = 0;
+
+ // Prepare the stream for reading, rewind/open as necessary.
+ virtual void Begin() = 0;
+
+ // Advance the cursor to the next frame
+ virtual void Next() = 0;
+
+ virtual const uint8_t *cxdata() const = 0;
+
+ virtual size_t frame_size() const = 0;
+
+ virtual unsigned int frame_number() const = 0;
+};
+
+} // namespace libaom_test
+
+#endif // TEST_VIDEO_SOURCE_H_