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-rw-r--r--media/libcubeb/test/test_ring_buffer.cpp229
1 files changed, 229 insertions, 0 deletions
diff --git a/media/libcubeb/test/test_ring_buffer.cpp b/media/libcubeb/test/test_ring_buffer.cpp
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+/*
+ * Copyright © 2016 Mozilla Foundation
+ *
+ * This program is made available under an ISC-style license. See the
+ * accompanying file LICENSE for details.
+ */
+
+#define NOMINMAX
+
+#include "gtest/gtest.h"
+#include "cubeb_ringbuffer.h"
+#include <iostream>
+#include <thread>
+#include <chrono>
+
+/* Generate a monotonically increasing sequence of numbers. */
+template<typename T>
+class sequence_generator
+{
+public:
+ sequence_generator(size_t channels)
+ : channels(channels)
+ { }
+ void get(T * elements, size_t frames)
+ {
+ for (size_t i = 0; i < frames; i++) {
+ for (size_t c = 0; c < channels; c++) {
+ elements[i * channels + c] = static_cast<T>(index_);
+ }
+ index_++;
+ }
+ }
+ void rewind(size_t frames)
+ {
+ index_ -= frames;
+ }
+private:
+ size_t index_ = 0;
+ size_t channels = 0;
+};
+
+/* Checks that a sequence is monotonically increasing. */
+template<typename T>
+class sequence_verifier
+{
+ public:
+ sequence_verifier(size_t channels)
+ : channels(channels)
+ { }
+ void check(T * elements, size_t frames)
+ {
+ for (size_t i = 0; i < frames; i++) {
+ for (size_t c = 0; c < channels; c++) {
+ if (elements[i * channels + c] != static_cast<T>(index_)) {
+ std::cerr << "Element " << i << " is different. Expected "
+ << static_cast<T>(index_) << ", got " << elements[i]
+ << ". (channel count: " << channels << ")." << std::endl;
+ ASSERT_TRUE(false);
+ }
+ }
+ index_++;
+ }
+ }
+ private:
+ size_t index_ = 0;
+ size_t channels = 0;
+};
+
+template<typename T>
+void test_ring(lock_free_audio_ring_buffer<T>& buf, int channels, int capacity_frames)
+{
+ std::unique_ptr<T[]> seq(new T[capacity_frames * channels]);
+ sequence_generator<T> gen(channels);
+ sequence_verifier<T> checker(channels);
+
+ int iterations = 1002;
+
+ const int block_size = 128;
+
+ while(iterations--) {
+ gen.get(seq.get(), block_size);
+ int rv = buf.enqueue(seq.get(), block_size);
+ ASSERT_EQ(rv, block_size);
+ PodZero(seq.get(), block_size);
+ rv = buf.dequeue(seq.get(), block_size);
+ ASSERT_EQ(rv, block_size);
+ checker.check(seq.get(), block_size);
+ }
+}
+
+template<typename T>
+void test_ring_multi(lock_free_audio_ring_buffer<T>& buf, int channels, int capacity_frames)
+{
+ sequence_verifier<T> checker(channels);
+ std::unique_ptr<T[]> out_buffer(new T[capacity_frames * channels]);
+
+ const int block_size = 128;
+
+ std::thread t([=, &buf] {
+ int iterations = 1002;
+ std::unique_ptr<T[]> in_buffer(new T[capacity_frames * channels]);
+ sequence_generator<T> gen(channels);
+
+ while(iterations--) {
+ std::this_thread::yield();
+ gen.get(in_buffer.get(), block_size);
+ int rv = buf.enqueue(in_buffer.get(), block_size);
+ ASSERT_TRUE(rv <= block_size);
+ if (rv != block_size) {
+ gen.rewind(block_size - rv);
+ }
+ }
+ });
+
+ int remaining = 1002;
+
+ while(remaining--) {
+ std::this_thread::yield();
+ int rv = buf.dequeue(out_buffer.get(), block_size);
+ ASSERT_TRUE(rv <= block_size);
+ checker.check(out_buffer.get(), rv);
+ }
+
+ t.join();
+}
+
+template<typename T>
+void basic_api_test(T& ring)
+{
+ ASSERT_EQ(ring.capacity(), 128);
+
+ ASSERT_EQ(ring.available_read(), 0);
+ ASSERT_EQ(ring.available_write(), 128);
+
+ int rv = ring.enqueue_default(63);
+
+ ASSERT_TRUE(rv == 63);
+ ASSERT_EQ(ring.available_read(), 63);
+ ASSERT_EQ(ring.available_write(), 65);
+
+ rv = ring.enqueue_default(65);
+
+ ASSERT_EQ(rv, 65);
+ ASSERT_EQ(ring.available_read(), 128);
+ ASSERT_EQ(ring.available_write(), 0);
+
+ rv = ring.dequeue(nullptr, 63);
+
+ ASSERT_EQ(ring.available_read(), 65);
+ ASSERT_EQ(ring.available_write(), 63);
+
+ rv = ring.dequeue(nullptr, 65);
+
+ ASSERT_EQ(ring.available_read(), 0);
+ ASSERT_EQ(ring.available_write(), 128);
+}
+
+void test_reset_api() {
+ const size_t ring_buffer_size = 128;
+ const size_t enqueue_size = ring_buffer_size / 2;
+
+ lock_free_queue<float> ring(ring_buffer_size);
+ std::thread t([=, &ring] {
+ std::unique_ptr<float[]> in_buffer(new float[enqueue_size]);
+ ring.enqueue(in_buffer.get(), enqueue_size);
+ });
+
+ t.join();
+
+ ring.reset_thread_ids();
+
+ // Enqueue with a different thread. We have reset the thread ID
+ // in the ring buffer, this should work.
+ std::thread t2([=, &ring] {
+ std::unique_ptr<float[]> in_buffer(new float[enqueue_size]);
+ ring.enqueue(in_buffer.get(), enqueue_size);
+ });
+
+ t2.join();
+
+ ASSERT_TRUE(true);
+}
+
+TEST(cubeb, ring_buffer)
+{
+ /* Basic API test. */
+ const int min_channels = 1;
+ const int max_channels = 10;
+ const int min_capacity = 199;
+ const int max_capacity = 1277;
+ const int capacity_increment = 27;
+
+ lock_free_queue<float> q1(128);
+ basic_api_test(q1);
+ lock_free_queue<short> q2(128);
+ basic_api_test(q2);
+
+ for (size_t channels = min_channels; channels < max_channels; channels++) {
+ lock_free_audio_ring_buffer<float> q3(channels, 128);
+ basic_api_test(q3);
+ lock_free_audio_ring_buffer<short> q4(channels, 128);
+ basic_api_test(q4);
+ }
+
+ /* Single thread testing. */
+ /* Test mono to 9.1 */
+ for (size_t channels = min_channels; channels < max_channels; channels++) {
+ /* Use non power-of-two numbers to catch edge-cases. */
+ for (size_t capacity_frames = min_capacity;
+ capacity_frames < max_capacity; capacity_frames+=capacity_increment) {
+ lock_free_audio_ring_buffer<float> ring(channels, capacity_frames);
+ test_ring(ring, channels, capacity_frames);
+ }
+ }
+
+ /* Multi thread testing */
+ for (size_t channels = min_channels; channels < max_channels; channels++) {
+ /* Use non power-of-two numbers to catch edge-cases. */
+ for (size_t capacity_frames = min_capacity;
+ capacity_frames < max_capacity; capacity_frames+=capacity_increment) {
+ lock_free_audio_ring_buffer<short> ring(channels, capacity_frames);
+ test_ring_multi(ring, channels, capacity_frames);
+ }
+ }
+
+ test_reset_api();
+}
+
+#undef NOMINMAX