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/*
* Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "common_audio/ring_buffer.h"
#include <stdlib.h>
#include <time.h>
#include <algorithm>
#include <memory>
#include "test/gtest.h"
namespace webrtc {
struct FreeBufferDeleter {
inline void operator()(void* ptr) const {
WebRtc_FreeBuffer(ptr);
}
};
typedef std::unique_ptr<RingBuffer, FreeBufferDeleter> scoped_ring_buffer;
static void AssertElementEq(int expected, int actual) {
ASSERT_EQ(expected, actual);
}
static int SetIncrementingData(int* data, int num_elements,
int starting_value) {
for (int i = 0; i < num_elements; i++) {
data[i] = starting_value++;
}
return starting_value;
}
static int CheckIncrementingData(int* data, int num_elements,
int starting_value) {
for (int i = 0; i < num_elements; i++) {
AssertElementEq(starting_value++, data[i]);
}
return starting_value;
}
// We use ASSERTs in this test to avoid obscuring the seed in the case of a
// failure.
static void RandomStressTest(int** data_ptr) {
const int kNumTests = 10;
const int kNumOps = 1000;
const int kMaxBufferSize = 1000;
unsigned int seed = time(nullptr);
printf("seed=%u\n", seed);
srand(seed);
for (int i = 0; i < kNumTests; i++) {
// rand_r is not supported on many platforms, so rand is used.
const int buffer_size = std::max(rand() % kMaxBufferSize, 1); // NOLINT
std::unique_ptr<int[]> write_data(new int[buffer_size]);
std::unique_ptr<int[]> read_data(new int[buffer_size]);
scoped_ring_buffer buffer(WebRtc_CreateBuffer(buffer_size, sizeof(int)));
ASSERT_TRUE(buffer.get() != nullptr);
WebRtc_InitBuffer(buffer.get());
int buffer_consumed = 0;
int write_element = 0;
int read_element = 0;
for (int j = 0; j < kNumOps; j++) {
const bool write = rand() % 2 == 0 ? true : false; // NOLINT
const int num_elements = rand() % buffer_size; // NOLINT
if (write) {
const int buffer_available = buffer_size - buffer_consumed;
ASSERT_EQ(static_cast<size_t>(buffer_available),
WebRtc_available_write(buffer.get()));
const int expected_elements = std::min(num_elements, buffer_available);
write_element = SetIncrementingData(write_data.get(), expected_elements,
write_element);
ASSERT_EQ(static_cast<size_t>(expected_elements),
WebRtc_WriteBuffer(buffer.get(), write_data.get(),
num_elements));
buffer_consumed = std::min(buffer_consumed + expected_elements,
buffer_size);
} else {
const int expected_elements = std::min(num_elements,
buffer_consumed);
ASSERT_EQ(static_cast<size_t>(buffer_consumed),
WebRtc_available_read(buffer.get()));
ASSERT_EQ(static_cast<size_t>(expected_elements),
WebRtc_ReadBuffer(buffer.get(),
reinterpret_cast<void**>(data_ptr),
read_data.get(),
num_elements));
int* check_ptr = read_data.get();
if (data_ptr) {
check_ptr = *data_ptr;
}
read_element = CheckIncrementingData(check_ptr, expected_elements,
read_element);
buffer_consumed = std::max(buffer_consumed - expected_elements, 0);
}
}
}
}
TEST(RingBufferTest, RandomStressTest) {
int* data_ptr = nullptr;
RandomStressTest(&data_ptr);
}
TEST(RingBufferTest, RandomStressTestWithNullPtr) {
RandomStressTest(nullptr);
}
TEST(RingBufferTest, PassingNulltoReadBufferForcesMemcpy) {
const size_t kDataSize = 2;
int write_data[kDataSize];
int read_data[kDataSize];
int* data_ptr;
scoped_ring_buffer buffer(WebRtc_CreateBuffer(kDataSize, sizeof(int)));
ASSERT_TRUE(buffer.get() != nullptr);
WebRtc_InitBuffer(buffer.get());
SetIncrementingData(write_data, kDataSize, 0);
EXPECT_EQ(kDataSize, WebRtc_WriteBuffer(buffer.get(), write_data, kDataSize));
SetIncrementingData(read_data, kDataSize, kDataSize);
EXPECT_EQ(kDataSize, WebRtc_ReadBuffer(buffer.get(),
reinterpret_cast<void**>(&data_ptr), read_data, kDataSize));
// Copying was not necessary, so |read_data| has not been updated.
CheckIncrementingData(data_ptr, kDataSize, 0);
CheckIncrementingData(read_data, kDataSize, kDataSize);
EXPECT_EQ(kDataSize, WebRtc_WriteBuffer(buffer.get(), write_data, kDataSize));
EXPECT_EQ(kDataSize,
WebRtc_ReadBuffer(buffer.get(), nullptr, read_data, kDataSize));
// Passing null forces a memcpy, so |read_data| is now updated.
CheckIncrementingData(read_data, kDataSize, 0);
}
TEST(RingBufferTest, CreateHandlesErrors) {
EXPECT_TRUE(WebRtc_CreateBuffer(0, 1) == nullptr);
EXPECT_TRUE(WebRtc_CreateBuffer(1, 0) == nullptr);
RingBuffer* buffer = WebRtc_CreateBuffer(1, 1);
EXPECT_TRUE(buffer != nullptr);
WebRtc_FreeBuffer(buffer);
}
} // namespace webrtc
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