/* * Copyright (C) 2017 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include <iostream> #include <math.h> #include <gtest/gtest.h> #include "utility/AAudioUtilities.h" #include "utility/LinearRamp.h" TEST(test_linear_ramp, linear_ramp_segments) { LinearRamp ramp; const float source[4] = {1.0f, 1.0f, 1.0f, 1.0f }; float destination[4] = {1.0f, 1.0f, 1.0f, 1.0f }; float levelFrom = -1.0f; float levelTo = -1.0f; ramp.setLengthInFrames(8); ramp.setTarget(8.0f); EXPECT_EQ(8, ramp.getLengthInFrames()); bool ramping = ramp.nextSegment(4, &levelFrom, &levelTo); EXPECT_EQ(1, ramping); EXPECT_EQ(0.0f, levelFrom); EXPECT_EQ(4.0f, levelTo); AAudio_linearRamp(source, destination, 4, 1, levelFrom, levelTo); EXPECT_EQ(0.0f, destination[0]); EXPECT_EQ(1.0f, destination[1]); EXPECT_EQ(2.0f, destination[2]); EXPECT_EQ(3.0f, destination[3]); ramping = ramp.nextSegment(4, &levelFrom, &levelTo); EXPECT_EQ(1, ramping); EXPECT_EQ(4.0f, levelFrom); EXPECT_EQ(8.0f, levelTo); AAudio_linearRamp(source, destination, 4, 1, levelFrom, levelTo); EXPECT_EQ(4.0f, destination[0]); EXPECT_EQ(5.0f, destination[1]); EXPECT_EQ(6.0f, destination[2]); EXPECT_EQ(7.0f, destination[3]); ramping = ramp.nextSegment(4, &levelFrom, &levelTo); EXPECT_EQ(0, ramping); EXPECT_EQ(8.0f, levelFrom); EXPECT_EQ(8.0f, levelTo); AAudio_linearRamp(source, destination, 4, 1, levelFrom, levelTo); EXPECT_EQ(8.0f, destination[0]); EXPECT_EQ(8.0f, destination[1]); EXPECT_EQ(8.0f, destination[2]); EXPECT_EQ(8.0f, destination[3]); }; TEST(test_linear_ramp, linear_ramp_forced) { LinearRamp ramp; const float source[4] = {1.0f, 1.0f, 1.0f, 1.0f }; float destination[4] = {1.0f, 1.0f, 1.0f, 1.0f }; float levelFrom = -1.0f; float levelTo = -1.0f; ramp.setLengthInFrames(4); ramp.setTarget(8.0f); ramp.forceCurrent(4.0f); EXPECT_EQ(4.0f, ramp.getCurrent()); bool ramping = ramp.nextSegment(4, &levelFrom, &levelTo); EXPECT_EQ(1, ramping); EXPECT_EQ(4.0f, levelFrom); EXPECT_EQ(8.0f, levelTo); AAudio_linearRamp(source, destination, 4, 1, levelFrom, levelTo); EXPECT_EQ(4.0f, destination[0]); EXPECT_EQ(5.0f, destination[1]); EXPECT_EQ(6.0f, destination[2]); EXPECT_EQ(7.0f, destination[3]); ramping = ramp.nextSegment(4, &levelFrom, &levelTo); EXPECT_EQ(0, ramping); EXPECT_EQ(8.0f, levelFrom); EXPECT_EQ(8.0f, levelTo); AAudio_linearRamp(source, destination, 4, 1, levelFrom, levelTo); EXPECT_EQ(8.0f, destination[0]); EXPECT_EQ(8.0f, destination[1]); EXPECT_EQ(8.0f, destination[2]); EXPECT_EQ(8.0f, destination[3]); }; constexpr int16_t kMaxI16 = INT16_MAX; constexpr int16_t kMinI16 = INT16_MIN; constexpr int16_t kHalfI16 = 16384; constexpr int16_t kTenthI16 = 3277; //void AAudioConvert_floatToPcm16(const float *source, // int16_t *destination, // int32_t numSamples, // float amplitude); TEST(test_linear_ramp, float_to_i16) { const float source[] = {12345.6f, 1.0f, 0.5f, 0.1f, 0.0f, -0.1f, -0.5f, -1.0f, -12345.6f}; constexpr size_t count = sizeof(source) / sizeof(source[0]); int16_t destination[count]; const int16_t expected[count] = {kMaxI16, kMaxI16, kHalfI16, kTenthI16, 0, -kTenthI16, -kHalfI16, kMinI16, kMinI16}; AAudioConvert_floatToPcm16(source, destination, count, 1.0f); for (size_t i = 0; i < count; i++) { EXPECT_EQ(expected[i], destination[i]); } } //void AAudioConvert_pcm16ToFloat(const int16_t *source, // float *destination, // int32_t numSamples, // float amplitude); TEST(test_linear_ramp, i16_to_float) { const int16_t source[] = {kMaxI16, kHalfI16, kTenthI16, 0, -kTenthI16, -kHalfI16, kMinI16}; constexpr size_t count = sizeof(source) / sizeof(source[0]); float destination[count]; const float expected[count] = {(32767.0f / 32768.0f), 0.5f, 0.1f, 0.0f, -0.1f, -0.5f, -1.0f}; AAudioConvert_pcm16ToFloat(source, destination, count, 1.0f); for (size_t i = 0; i < count; i++) { EXPECT_NEAR(expected[i], destination[i], 0.0001f); } } //void AAudio_linearRamp(const int16_t *source, // int16_t *destination, // int32_t numFrames, // int32_t samplesPerFrame, // float amplitude1, // float amplitude2); TEST(test_linear_ramp, ramp_i16_to_i16) { const int16_t source[] = {1, 1, 1, 1, 1, 1, 1, 1}; constexpr size_t count = sizeof(source) / sizeof(source[0]); int16_t destination[count]; // Ramp will sweep from -1 to almost +1 const int16_t expected[count] = { -1, // from -1.00 -1, // from -0.75 -1, // from -0.55, round away from zero 0, // from -0.25, round up to zero 0, // from 0.00 0, // from 0.25, round down to zero 1, // from 0.50, round away from zero 1 // from 0.75 }; // sweep across zero to test symmetry constexpr float amplitude1 = -1.0; constexpr float amplitude2 = 1.0; AAudio_linearRamp(source, destination, count, 1, amplitude1, amplitude2); for (size_t i = 0; i < count; i++) { EXPECT_EQ(expected[i], destination[i]); } }