Reland of Moved ring-buffer related files from common_audio to audio_processing"

webrtc/common_audio/ring_buffer_unittest.cc

-/*
- *  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 "webrtc/common_audio/ring_buffer.h"
-
-#include <stdlib.h>
-#include <time.h>
-
-#include <algorithm>
-#include <memory>
-
-#include "testing/gtest/include/gtest/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(NULL);
-  printf("seed=%u\n", seed);
-  srand(seed);
-  for (int i = 0; i < kNumTests; i++) {
-    const int buffer_size = std::max(rand() % kMaxBufferSize, 1);
-    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() != NULL);
-    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;
-      const int num_elements = rand() % buffer_size;
-      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 = NULL;
-  RandomStressTest(&data_ptr);
-}
-
-TEST(RingBufferTest, RandomStressTestWithNullPtr) {
-  RandomStressTest(NULL);
-}
-
-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() != NULL);
-  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(), NULL, 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) == NULL);
-  EXPECT_TRUE(WebRtc_CreateBuffer(1, 0) == NULL);
-  RingBuffer* buffer = WebRtc_CreateBuffer(1, 1);
-  EXPECT_TRUE(buffer != NULL);
-  WebRtc_FreeBuffer(buffer);
-}
-
-}  // namespace webrtc