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Commit c2d20797 authored by Phil Burk's avatar Phil Burk
Browse files

aaudio: test linear ramp and conversion utilities 

Add specific  tests of the utilities.

Test: this is a test
Change-Id: I376655d9d9d4b5e187965ec1c312f1c93977958d
parent 693cb2bd

media/libaaudio/tests/test_linear_ramp.cpp

+110 −38
Original line number Original line Diff line number Diff line
@@ -15,13 +15,13 @@ 
 */

 */





#include <iostream>

#include <iostream>

#include <math.h>





#include <gtest/gtest.h>

#include <gtest/gtest.h>





#include "utility/AAudioUtilities.h"

#include "utility/AAudioUtilities.h"

#include "utility/LinearRamp.h"

#include "utility/LinearRamp.h"







TEST(test_linear_ramp, linear_ramp_segments) {

TEST(test_linear_ramp, linear_ramp_segments) {

    LinearRamp ramp;

    LinearRamp ramp;

    const float source[4] = {1.0f, 1.0f, 1.0f, 1.0f };

    const float source[4] = {1.0f, 1.0f, 1.0f, 1.0f };
@@ -32,40 +32,40 @@ TEST(test_linear_ramp, linear_ramp_segments) { 
    ramp.setLengthInFrames(8);

    ramp.setLengthInFrames(8);

    ramp.setTarget(8.0f);

    ramp.setTarget(8.0f);





    ASSERT_EQ(8, ramp.getLengthInFrames());

    EXPECT_EQ(8, ramp.getLengthInFrames());





    bool ramping = ramp.nextSegment(4, &levelFrom, &levelTo);

    bool ramping = ramp.nextSegment(4, &levelFrom, &levelTo);

    ASSERT_EQ(1, ramping);

    EXPECT_EQ(1, ramping);

    ASSERT_EQ(0.0f, levelFrom);

    EXPECT_EQ(0.0f, levelFrom);

    ASSERT_EQ(4.0f, levelTo);

    EXPECT_EQ(4.0f, levelTo);





    AAudio_linearRamp(source, destination, 4, 1, levelFrom, levelTo);

    AAudio_linearRamp(source, destination, 4, 1, levelFrom, levelTo);

    ASSERT_EQ(0.0f, destination[0]);

    EXPECT_EQ(0.0f, destination[0]);

    ASSERT_EQ(1.0f, destination[1]);

    EXPECT_EQ(1.0f, destination[1]);

    ASSERT_EQ(2.0f, destination[2]);

    EXPECT_EQ(2.0f, destination[2]);

    ASSERT_EQ(3.0f, destination[3]);

    EXPECT_EQ(3.0f, destination[3]);





    ramping = ramp.nextSegment(4, &levelFrom, &levelTo);

    ramping = ramp.nextSegment(4, &levelFrom, &levelTo);

    ASSERT_EQ(1, ramping);

    EXPECT_EQ(1, ramping);

    ASSERT_EQ(4.0f, levelFrom);

    EXPECT_EQ(4.0f, levelFrom);

    ASSERT_EQ(8.0f, levelTo);

    EXPECT_EQ(8.0f, levelTo);





    AAudio_linearRamp(source, destination, 4, 1, levelFrom, levelTo);

    AAudio_linearRamp(source, destination, 4, 1, levelFrom, levelTo);

    ASSERT_EQ(4.0f, destination[0]);

    EXPECT_EQ(4.0f, destination[0]);

    ASSERT_EQ(5.0f, destination[1]);

    EXPECT_EQ(5.0f, destination[1]);

    ASSERT_EQ(6.0f, destination[2]);

    EXPECT_EQ(6.0f, destination[2]);

    ASSERT_EQ(7.0f, destination[3]);

    EXPECT_EQ(7.0f, destination[3]);





    ramping = ramp.nextSegment(4, &levelFrom, &levelTo);

    ramping = ramp.nextSegment(4, &levelFrom, &levelTo);

    ASSERT_EQ(0, ramping);

    EXPECT_EQ(0, ramping);

    ASSERT_EQ(8.0f, levelFrom);

    EXPECT_EQ(8.0f, levelFrom);

    ASSERT_EQ(8.0f, levelTo);

    EXPECT_EQ(8.0f, levelTo);





    AAudio_linearRamp(source, destination, 4, 1, levelFrom, levelTo);

    AAudio_linearRamp(source, destination, 4, 1, levelFrom, levelTo);

    ASSERT_EQ(8.0f, destination[0]);

    EXPECT_EQ(8.0f, destination[0]);

    ASSERT_EQ(8.0f, destination[1]);

    EXPECT_EQ(8.0f, destination[1]);

    ASSERT_EQ(8.0f, destination[2]);

    EXPECT_EQ(8.0f, destination[2]);

    ASSERT_EQ(8.0f, destination[3]);

    EXPECT_EQ(8.0f, destination[3]);





};

};
@@ -80,29 +80,101 @@ TEST(test_linear_ramp, linear_ramp_forced) { 
    ramp.setLengthInFrames(4);

    ramp.setLengthInFrames(4);

    ramp.setTarget(8.0f);

    ramp.setTarget(8.0f);

    ramp.forceCurrent(4.0f);

    ramp.forceCurrent(4.0f);

    ASSERT_EQ(4.0f, ramp.getCurrent());

    EXPECT_EQ(4.0f, ramp.getCurrent());





    bool ramping = ramp.nextSegment(4, &levelFrom, &levelTo);

    bool ramping = ramp.nextSegment(4, &levelFrom, &levelTo);

    ASSERT_EQ(1, ramping);

    EXPECT_EQ(1, ramping);

    ASSERT_EQ(4.0f, levelFrom);

    EXPECT_EQ(4.0f, levelFrom);

    ASSERT_EQ(8.0f, levelTo);

    EXPECT_EQ(8.0f, levelTo);





    AAudio_linearRamp(source, destination, 4, 1, levelFrom, levelTo);

    AAudio_linearRamp(source, destination, 4, 1, levelFrom, levelTo);

    ASSERT_EQ(4.0f, destination[0]);

    EXPECT_EQ(4.0f, destination[0]);

    ASSERT_EQ(5.0f, destination[1]);

    EXPECT_EQ(5.0f, destination[1]);

    ASSERT_EQ(6.0f, destination[2]);

    EXPECT_EQ(6.0f, destination[2]);

    ASSERT_EQ(7.0f, destination[3]);

    EXPECT_EQ(7.0f, destination[3]);





    ramping = ramp.nextSegment(4, &levelFrom, &levelTo);

    ramping = ramp.nextSegment(4, &levelFrom, &levelTo);

    ASSERT_EQ(0, ramping);

    EXPECT_EQ(0, ramping);

    ASSERT_EQ(8.0f, levelFrom);

    EXPECT_EQ(8.0f, levelFrom);

    ASSERT_EQ(8.0f, levelTo);

    EXPECT_EQ(8.0f, levelTo);





    AAudio_linearRamp(source, destination, 4, 1, levelFrom, levelTo);

    AAudio_linearRamp(source, destination, 4, 1, levelFrom, levelTo);

    ASSERT_EQ(8.0f, destination[0]);

    EXPECT_EQ(8.0f, destination[0]);

    ASSERT_EQ(8.0f, destination[1]);

    EXPECT_EQ(8.0f, destination[1]);

    ASSERT_EQ(8.0f, destination[2]);

    EXPECT_EQ(8.0f, destination[2]);

    ASSERT_EQ(8.0f, destination[3]);

    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]);

    }



}