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conv_test.go
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conv_test.go
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package audio
import (
"bytes"
"math"
"testing"
)
func TestInt24BETo32(t *testing.T) {
tests := []struct {
name string
bytes []byte
want int32
}{
{"max", []byte{0x7F, 0xFF, 0xFF}, 8388607},
{"mid", []byte{0xFF, 0xFF, 0xFF}, -1},
{"min", []byte{0x80, 0x00, 0x01}, -8388607},
{"random", []byte{0x5D, 0xCB, 0xED}, 6147053},
{"random inverted", []byte{0xA2, 0x34, 0x13}, -6147053},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if got := Int24BETo32(tt.bytes); got != tt.want {
t.Errorf("Int24BETo32() = %v, want %v", got, tt.want)
}
})
}
}
func TestInt24LETo32(t *testing.T) {
tests := []struct {
name string
bytes []byte
want int32
}{
{"max", []byte{0xFF, 0xFF, 0x7F}, 8388607},
{"mid", []byte{0xFF, 0xFF, 0xFF}, -1},
{"min", []byte{0x01, 0x00, 0x80}, -8388607},
{"random", []byte{0xED, 0xCB, 0x5D}, 6147053},
{"random inverted", []byte{0x13, 0x34, 0xA2}, -6147053},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if got := Int24LETo32(tt.bytes); got != tt.want {
t.Errorf("Int24LETo32() = %v, want %v", got, tt.want)
}
})
}
}
func TestInt32toInt24BEBytes(t *testing.T) {
tests := []struct {
name string
want []byte
val int32
}{
{name: "mid", want: []byte{0xFF, 0xFF, 0xFF}, val: -1},
{name: "max", want: []byte{0x7F, 0xFF, 0xFF}, val: 8388607},
{name: "min", want: []byte{0x80, 0x00, 0x01}, val: -8388607},
{name: "random", want: []byte{0x5D, 0xCB, 0xED}, val: 6147053},
{name: "random inverted", want: []byte{0xA2, 0x34, 0x13}, val: -6147053},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if got := Int32toInt24BEBytes(tt.val); bytes.Compare(tt.want, got) != 0 {
t.Errorf("Int32toInt24BEBytes(%d) = %x, want %x", tt.val, got, tt.want)
}
})
}
}
func TestInt32toInt24LEBytes(t *testing.T) {
tests := []struct {
name string
want []byte
val int32
}{
{name: "mid", want: []byte{0xFF, 0xFF, 0xFF}, val: -1},
{name: "max", want: []byte{0xFF, 0xFF, 0x7F}, val: 8388607},
{name: "min", want: []byte{0x01, 0x00, 0x80}, val: -8388607},
{name: "random", want: []byte{0xED, 0xCB, 0x5D}, val: 6147053},
{name: "random inverted", want: []byte{0x13, 0x34, 0xA2}, val: -6147053},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if got := Int32toInt24LEBytes(tt.val); bytes.Compare(tt.want, got) != 0 {
t.Errorf("Int32toInt24LEBytes(%d) = %x, want %x", tt.val, got, tt.want)
}
})
}
}
// round tripping similar to aiff to wav
func TestInt24BETo32ToLEToInt32(t *testing.T) {
tests := []struct {
name string
be []byte
le []byte
val int32
}{
{name: "mid", be: []byte{0xFF, 0xFF, 0xFF}, le: []byte{0xff, 0xff, 0xff}, val: -1},
{name: "max", be: []byte{0x7F, 0xFF, 0xFF}, le: []byte{0xff, 0xff, 0x7f}, val: 8388607},
{name: "min", be: []byte{0x80, 0x00, 0x01}, le: []byte{0x01, 0x00, 0x80}, val: -8388607},
{name: "random", be: []byte{0x5D, 0xCB, 0xED}, le: []byte{0xED, 0xCB, 0x5D}, val: 6147053},
{name: "random inverted", be: []byte{0xA2, 0x34, 0x13}, le: []byte{0x13, 0x34, 0xA2}, val: -6147053},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
beV := Int24BETo32(tt.be)
if beV != tt.val {
t.Errorf("Int24BETo32(%x) = %d, want %d", tt.be, beV, tt.val)
}
leB := Int32toInt24LEBytes(beV)
if bytes.Compare(leB, tt.le) != 0 {
t.Errorf("Int32toInt24LEBytes(%d) = %#v, want %#v", beV, leB, tt.le)
}
leV := Int24LETo32(leB)
if leV != tt.val {
t.Errorf("Int24LETo32(%#v) = %d, want %d", leB, leV, tt.val)
}
})
}
}
func TestUint32toUint24Bytes(t *testing.T) {
tests := []struct {
name string
be []byte
val uint32
}{
{name: "mid", be: []byte{0x0, 0x0, 0x1}, val: 1},
{name: "max", be: []byte{0xFF, 0xFF, 0xFF}, val: math.MaxUint32},
{name: "random", be: []byte{0x5D, 0xCB, 0xED}, val: 6147053},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
beB := Uint32toUint24Bytes(tt.val)
if bytes.Compare(beB, tt.be) != 0 {
t.Errorf("Uint32toUint24Bytes(%d) = %x, want %x", tt.val, beB, tt.be)
}
})
}
}
func TestUint24to32(t *testing.T) {
tests := []struct {
name string
be []byte
val uint32
}{
{name: "mid", be: []byte{0x0, 0x0, 0x1}, val: 1},
{name: "max", be: []byte{0xff, 0xff, 0xff}, val: 16777215},
{name: "random", be: []byte{0x5D, 0xCB, 0xED}, val: 6147053},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
val := Uint24to32(tt.be)
if val != tt.val {
t.Errorf("Uint24to32(%x) = %d, want %d", tt.be, val, tt.val)
}
})
}
}
func TestIntToIEEEFloat(t *testing.T) {
tests := []struct {
name string
ret [10]byte
val int
val2 int
}{
{name: "min", ret: [10]byte{0x3f, 0xff, 0x80}, val: 1, val2: 1},
{name: "max", ret: [10]byte{0x40, 0x3e, 0x80}, val: math.MaxInt64, val2: 800000000}, // IEEEFloatToInt truncates
{name: "random", ret: [10]byte{0x40, 0x15, 0xbb, 0x97, 0xda}, val: 6147053, val2: 6147053},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
val := IntToIEEEFloat(tt.val)
if val != tt.ret {
t.Errorf("IntToIEEEFloat(%d) = %x, want %x", tt.val, val, tt.ret)
}
})
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
val := IEEEFloatToInt(tt.ret)
if val != tt.val2 {
t.Errorf("IEEEFloatToInt(%x) = %d, want %d", tt.ret, val, tt.val2)
}
})
}
}