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
11 #include <math.h>
12 #include <stdlib.h>
13 #include <string.h>
14
15 #include "gtest/gtest.h"
16
17 #include "test/acm_random.h"
18 #include "vpx/vpx_integer.h"
19 #include "vpx_dsp/bitreader.h"
20 #include "vpx_dsp/bitwriter.h"
21
22 using libvpx_test::ACMRandom;
23
24 namespace {
25 const int num_tests = 10;
26 } // namespace
27
TEST(VP9,TestBitIO)28 TEST(VP9, TestBitIO) {
29 ACMRandom rnd(ACMRandom::DeterministicSeed());
30 for (int n = 0; n < num_tests; ++n) {
31 for (int method = 0; method <= 7; ++method) { // we generate various proba
32 const int kBitsToTest = 1000;
33 uint8_t probas[kBitsToTest];
34
35 for (int i = 0; i < kBitsToTest; ++i) {
36 const int parity = i & 1;
37 /* clang-format off */
38 probas[i] =
39 (method == 0) ? 0 : (method == 1) ? 255 :
40 (method == 2) ? 128 :
41 (method == 3) ? rnd.Rand8() :
42 (method == 4) ? (parity ? 0 : 255) :
43 // alternate between low and high proba:
44 (method == 5) ? (parity ? rnd(128) : 255 - rnd(128)) :
45 (method == 6) ?
46 (parity ? rnd(64) : 255 - rnd(64)) :
47 (parity ? rnd(32) : 255 - rnd(32));
48 /* clang-format on */
49 }
50 for (int bit_method = 0; bit_method <= 3; ++bit_method) {
51 const int random_seed = 6432;
52 const int kBufferSize = 10000;
53 ACMRandom bit_rnd(random_seed);
54 vpx_writer bw;
55 uint8_t bw_buffer[kBufferSize];
56 vpx_start_encode(&bw, bw_buffer, sizeof(bw_buffer));
57
58 int bit = (bit_method == 0) ? 0 : (bit_method == 1) ? 1 : 0;
59 for (int i = 0; i < kBitsToTest; ++i) {
60 if (bit_method == 2) {
61 bit = (i & 1);
62 } else if (bit_method == 3) {
63 bit = bit_rnd(2);
64 }
65 vpx_write(&bw, bit, static_cast<int>(probas[i]));
66 }
67
68 GTEST_ASSERT_EQ(vpx_stop_encode(&bw), 0);
69 // vpx_reader_fill() may read into uninitialized data that
70 // isn't used meaningfully, but may trigger an MSan warning.
71 memset(bw_buffer + bw.pos, 0, sizeof(BD_VALUE) - 1);
72
73 // First bit should be zero
74 GTEST_ASSERT_EQ(bw_buffer[0] & 0x80, 0);
75
76 vpx_reader br;
77 vpx_reader_init(&br, bw_buffer, kBufferSize, nullptr, nullptr);
78 bit_rnd.Reset(random_seed);
79 for (int i = 0; i < kBitsToTest; ++i) {
80 if (bit_method == 2) {
81 bit = (i & 1);
82 } else if (bit_method == 3) {
83 bit = bit_rnd(2);
84 }
85 GTEST_ASSERT_EQ(vpx_read(&br, probas[i]), bit)
86 << "pos: " << i << " / " << kBitsToTest
87 << " bit_method: " << bit_method << " method: " << method;
88 }
89 }
90 }
91 }
92 }
93
TEST(VP9,TestBitIOBufferSize0)94 TEST(VP9, TestBitIOBufferSize0) {
95 vpx_writer bw;
96 uint8_t bw_buffer[1];
97 vpx_start_encode(&bw, bw_buffer, 0);
98 GTEST_ASSERT_EQ(vpx_stop_encode(&bw), -1);
99 }
100
TEST(VP9,TestBitIOBufferSize1)101 TEST(VP9, TestBitIOBufferSize1) {
102 vpx_writer bw;
103 uint8_t bw_buffer[1];
104 vpx_start_encode(&bw, bw_buffer, sizeof(bw_buffer));
105 GTEST_ASSERT_EQ(vpx_stop_encode(&bw), -1);
106 }
107
TEST(VP9,TestBitIOBufferSize2)108 TEST(VP9, TestBitIOBufferSize2) {
109 vpx_writer bw;
110 uint8_t bw_buffer[2];
111 vpx_start_encode(&bw, bw_buffer, sizeof(bw_buffer));
112 GTEST_ASSERT_EQ(vpx_stop_encode(&bw), 0);
113 }
114