segment_binarization_sync.cc (1659B)
1 /* 2 * Copyright (c) 2018, Alliance for Open Media. All rights reserved. 3 * 4 * This source code is subject to the terms of the BSD 2 Clause License and 5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License 6 * was not distributed with this source code in the LICENSE file, you can 7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open 8 * Media Patent License 1.0 was not distributed with this source code in the 9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent. 10 */ 11 12 #include "gtest/gtest.h" 13 14 #include "av1/common/seg_common.h" 15 #include "av1/decoder/decodemv.h" 16 #include "av1/encoder/bitstream.h" 17 #include "test/acm_random.h" 18 19 using libaom_test::ACMRandom; 20 21 namespace { 22 23 struct Segment { 24 int id; 25 int pred; 26 int last_id; 27 }; 28 29 Segment GenerateSegment(int seed) { 30 ACMRandom rnd_(seed); 31 32 Segment segment; 33 const int last_segid = rnd_.PseudoUniform(MAX_SEGMENTS); 34 segment.last_id = last_segid; 35 segment.pred = rnd_.PseudoUniform(MAX_SEGMENTS); 36 segment.id = rnd_.PseudoUniform(last_segid + 1); 37 38 return segment; 39 } 40 41 // Try to reveal a mismatch between segment binarization and debinarization 42 TEST(SegmentBinarizationSync, SearchForBinarizationMismatch) { 43 const int count_tests = 1000; 44 const int seed_init = 4321; 45 46 for (int i = 0; i < count_tests; ++i) { 47 const Segment seg = GenerateSegment(seed_init + i); 48 49 const int max_segid = seg.last_id + 1; 50 const int seg_diff = av1_neg_interleave(seg.id, seg.pred, max_segid); 51 const int decoded_segid = 52 av1_neg_deinterleave(seg_diff, seg.pred, max_segid); 53 54 ASSERT_EQ(decoded_segid, seg.id); 55 } 56 } 57 58 } // namespace