func testCorrectnessAligned() {
fmt.Printf("Correctness Test - byte aligned\n")
values := make([]int, 100)
rand.Seed(time.Now().UTC().UnixNano())
for test := 0; test < 10; test++ {
buffer := make([]byte, 16384)
os_, _ := util.NewByteArrayOutputStream(buffer, true)
obs, _ := bitstream.NewDefaultOutputBitStream(os_, 16384)
dbs, _ := bitstream.NewDebugOutputBitStream(obs, os.Stdout)
dbs.ShowByte(true)
for i := range values {
if test < 5 {
values[i] = rand.Intn(test*1000 + 100)
} else {
values[i] = rand.Intn(1 << 31)
}
fmt.Printf("%v ", values[i])
if i%50 == 49 {
println()
}
}
println()
println()
for i := range values {
dbs.WriteBits(uint64(values[i]), 32)
}
// Close first to force flush()
dbs.Close()
is_, _ := util.NewByteArrayInputStream(buffer, true)
ibs, _ := bitstream.NewDefaultInputBitStream(is_, 16384)
fmt.Printf("\nRead:\n")
ok := true
for i := range values {
x := ibs.ReadBits(32)
fmt.Printf("%v", x)
if int(x) == values[i] {
fmt.Printf(" ")
} else {
fmt.Printf("* ")
ok = false
}
if i%50 == 49 {
println()
}
}
ibs.Close()
println()
println()
fmt.Printf("Bits written: %v\n", dbs.Written())
fmt.Printf("Bits read: %v\n", ibs.Read())
if ok {
fmt.Printf("\nSuccess\n")
} else {
fmt.Printf("\nFailure\n")
}
println()
println()
}
}
func TestCorrectness() {
fmt.Printf("\n\nCorrectness test")
// Test behavior
for ii := 1; ii < 20; ii++ {
fmt.Printf("\nTest %v", ii)
var values []byte
rand.Seed(time.Now().UTC().UnixNano())
if ii == 3 {
values = []byte{0, 0, 32, 15, -4 & 0xFF, 16, 0, 16, 0, 7, -1 & 0xFF, -4 & 0xFF, -32 & 0xFF, 0, 31, -1 & 0xFF}
} else if ii == 2 {
values = []byte{0x3d, 0x4d, 0x54, 0x47, 0x5a, 0x36, 0x39, 0x26, 0x72, 0x6f, 0x6c, 0x65, 0x3d, 0x70, 0x72, 0x65}
} else if ii == 4 {
values = []byte{65, 71, 74, 66, 76, 65, 69, 77, 74, 79, 68, 75, 73, 72, 77, 68, 78, 65, 79, 79, 78, 66, 77, 71, 64, 70, 74, 77, 64, 67, 71, 64}
} else if ii == 1 {
values = make([]byte, 32)
for i := range values {
values[i] = byte(2) // all identical
}
} else if ii == 5 {
values = make([]byte, 32)
for i := range values {
values[i] = byte(2 + (i & 1)) // 2 symbols
}
} else {
values = make([]byte, 32)
for i := range values {
values[i] = byte(64 + 3*ii + rand.Intn(ii+1))
}
}
fmt.Printf("\nOriginal: ")
for i := range values {
fmt.Printf("%d ", values[i])
}
fmt.Printf("\nEncoded: ")
buffer := make([]byte, 16384)
oFile, _ := util.NewByteArrayOutputStream(buffer, true)
defer oFile.Close()
obs, _ := bitstream.NewDefaultOutputBitStream(oFile, 16384)
dbgbs, _ := bitstream.NewDebugOutputBitStream(obs, os.Stdout)
dbgbs.ShowByte(true)
dbgbs.Mark(true)
hc, _ := entropy.NewANSRangeEncoder(dbgbs)
if _, err := hc.Encode(values); err != nil {
fmt.Printf("Error during encoding: %s", err)
os.Exit(1)
}
hc.Dispose()
dbgbs.Close()
println()
iFile, _ := util.NewByteArrayInputStream(buffer, true)
defer iFile.Close()
ibs, _ := bitstream.NewDefaultInputBitStream(iFile, 16384)
dbgbs2, _ := bitstream.NewDebugInputBitStream(ibs, os.Stdout)
//dbgbs2.ShowByte(true)
dbgbs2.Mark(true)
hd, _ := entropy.NewANSRangeDecoder(dbgbs2)
ok := true
values2 := make([]byte, len(values))
if _, err := hd.Decode(values2); err != nil {
fmt.Printf("Error during decoding: %s", err)
os.Exit(1)
}
fmt.Printf("\nDecoded: ")
for i := range values2 {
fmt.Printf("%v ", values2[i])
if values[i] != values2[i] {
ok = false
}
}
if ok == true {
fmt.Printf("\nIdentical")
} else {
fmt.Printf("\n! *** Different *** !")
os.Exit(1)
}
hd.Dispose()
println()
}
}
func TestCorrectness() {
fmt.Printf("\n\nCorrectness test")
// Test behavior
for ii := 1; ii < 20; ii++ {
fmt.Printf("\nTest %v", ii)
var values []byte
rand.Seed(time.Now().UTC().UnixNano())
if ii == 1 {
values = []byte{17, 8, 30, 28, 6, 26, 2, 9, 31, 0, 15, 30, 11, 27, 17, 11, 24, 6, 10, 24, 15, 10, 16, 13, 6, 21, 1, 18, 0, 3, 23, 6}
} else {
values = make([]byte, 32)
for i := range values {
values[i] = byte(rand.Intn(32) - 16*(ii&1))
}
}
fmt.Printf("\nOriginal: ")
for i := range values {
fmt.Printf("%d ", values[i])
}
signed := true
if ii&1 == 0 {
signed = false
}
fmt.Printf("\nEncoded: ")
buffer := make([]byte, 16384)
oFile, _ := util.NewByteArrayOutputStream(buffer, true)
defer oFile.Close()
obs, _ := bitstream.NewDefaultOutputBitStream(oFile, 16384)
dbgbs, _ := bitstream.NewDebugOutputBitStream(obs, os.Stdout)
// Alternate signed / unsigned coding
fpc, _ := entropy.NewExpGolombEncoder(dbgbs, signed)
if _, err := fpc.Encode(values); err != nil {
fmt.Printf("Error during encoding: %s", err)
os.Exit(1)
}
fpc.Dispose()
dbgbs.Close()
if _, err := dbgbs.Close(); err != nil {
fmt.Printf("Error during close: %v\n", err)
os.Exit(1)
}
println()
iFile, _ := util.NewByteArrayInputStream(buffer, true)
defer iFile.Close()
ibs, _ := bitstream.NewDefaultInputBitStream(iFile, 16384)
dbgbs2, _ := bitstream.NewDebugInputBitStream(ibs, os.Stdout)
dbgbs2.Mark(true)
fpd, _ := entropy.NewExpGolombDecoder(dbgbs2, signed)
ok := true
values2 := make([]byte, len(values))
if _, err := fpd.Decode(values2); err != nil {
fmt.Printf("Error during decoding: %s", err)
os.Exit(1)
}
fmt.Printf("\nDecoded: ")
for i := range values2 {
fmt.Printf("%v ", values2[i])
if values[i] != values2[i] {
ok = false
}
}
if ok == true {
fmt.Printf("\nIdentical")
} else {
fmt.Printf("\n! *** Different *** !")
os.Exit(1)
}
fpd.Dispose()
dbgbs2.Close()
fmt.Printf("\n")
}
}