2 * Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
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.
11 // TODO(ajm): Make this a comprehensive test.
14 #include "webrtc/modules/audio_processing/utility/ring_buffer.h"
20 #include "testing/gtest/include/gtest/gtest.h"
21 #include "webrtc/system_wrappers/interface/scoped_ptr.h"
25 struct FreeBufferDeleter {
26 inline void operator()(void* ptr) const {
27 WebRtc_FreeBuffer(ptr);
30 typedef scoped_ptr<RingBuffer, FreeBufferDeleter> scoped_ring_buffer;
32 static void AssertElementEq(int expected, int actual) {
33 ASSERT_EQ(expected, actual);
36 static int SetIncrementingData(int* data, int num_elements,
38 for (int i = 0; i < num_elements; i++) {
39 data[i] = starting_value++;
41 return starting_value;
44 static int CheckIncrementingData(int* data, int num_elements,
46 for (int i = 0; i < num_elements; i++) {
47 AssertElementEq(starting_value++, data[i]);
49 return starting_value;
52 // We use ASSERTs in this test to avoid obscuring the seed in the case of a
54 static void RandomStressTest(int** data_ptr) {
55 const int kNumTests = 10;
56 const int kNumOps = 1000;
57 const int kMaxBufferSize = 1000;
59 unsigned int seed = time(NULL);
60 printf("seed=%u\n", seed);
62 for (int i = 0; i < kNumTests; i++) {
63 const int buffer_size = std::max(rand() % kMaxBufferSize, 1);
64 scoped_ptr<int[]> write_data(new int[buffer_size]);
65 scoped_ptr<int[]> read_data(new int[buffer_size]);
66 scoped_ring_buffer buffer(WebRtc_CreateBuffer(buffer_size, sizeof(int)));
67 ASSERT_TRUE(buffer.get() != NULL);
68 ASSERT_EQ(0, WebRtc_InitBuffer(buffer.get()));
69 int buffer_consumed = 0;
70 int write_element = 0;
72 for (int j = 0; j < kNumOps; j++) {
73 const bool write = rand() % 2 == 0 ? true : false;
74 const int num_elements = rand() % buffer_size;
76 const int buffer_available = buffer_size - buffer_consumed;
77 ASSERT_EQ(static_cast<size_t>(buffer_available),
78 WebRtc_available_write(buffer.get()));
79 const int expected_elements = std::min(num_elements, buffer_available);
80 write_element = SetIncrementingData(write_data.get(), expected_elements,
82 ASSERT_EQ(static_cast<size_t>(expected_elements),
83 WebRtc_WriteBuffer(buffer.get(), write_data.get(),
85 buffer_consumed = std::min(buffer_consumed + expected_elements,
88 const int expected_elements = std::min(num_elements,
90 ASSERT_EQ(static_cast<size_t>(buffer_consumed),
91 WebRtc_available_read(buffer.get()));
92 ASSERT_EQ(static_cast<size_t>(expected_elements),
93 WebRtc_ReadBuffer(buffer.get(),
94 reinterpret_cast<void**>(data_ptr),
97 int* check_ptr = read_data.get();
99 check_ptr = *data_ptr;
101 read_element = CheckIncrementingData(check_ptr, expected_elements,
103 buffer_consumed = std::max(buffer_consumed - expected_elements, 0);
109 TEST(RingBufferTest, RandomStressTest) {
110 int* data_ptr = NULL;
111 RandomStressTest(&data_ptr);
114 TEST(RingBufferTest, RandomStressTestWithNullPtr) {
115 RandomStressTest(NULL);
118 TEST(RingBufferTest, PassingNulltoReadBufferForcesMemcpy) {
119 const size_t kDataSize = 2;
120 int write_data[kDataSize];
121 int read_data[kDataSize];
124 scoped_ring_buffer buffer(WebRtc_CreateBuffer(kDataSize, sizeof(int)));
125 ASSERT_TRUE(buffer.get() != NULL);
126 ASSERT_EQ(0, WebRtc_InitBuffer(buffer.get()));
128 SetIncrementingData(write_data, kDataSize, 0);
129 EXPECT_EQ(kDataSize, WebRtc_WriteBuffer(buffer.get(), write_data, kDataSize));
130 SetIncrementingData(read_data, kDataSize, kDataSize);
131 EXPECT_EQ(kDataSize, WebRtc_ReadBuffer(buffer.get(),
132 reinterpret_cast<void**>(&data_ptr), read_data, kDataSize));
133 // Copying was not necessary, so |read_data| has not been updated.
134 CheckIncrementingData(data_ptr, kDataSize, 0);
135 CheckIncrementingData(read_data, kDataSize, kDataSize);
137 EXPECT_EQ(kDataSize, WebRtc_WriteBuffer(buffer.get(), write_data, kDataSize));
138 EXPECT_EQ(kDataSize, WebRtc_ReadBuffer(buffer.get(), NULL, read_data,
140 // Passing NULL forces a memcpy, so |read_data| is now updated.
141 CheckIncrementingData(read_data, kDataSize, 0);
144 TEST(RingBufferTest, CreateHandlesErrors) {
145 EXPECT_TRUE(WebRtc_CreateBuffer(0, 1) == NULL);
146 EXPECT_TRUE(WebRtc_CreateBuffer(1, 0) == NULL);
147 RingBuffer* buffer = WebRtc_CreateBuffer(1, 1);
148 EXPECT_TRUE(buffer != NULL);
149 WebRtc_FreeBuffer(buffer);
152 } // namespace webrtc