staticcheck fixes
This commit is contained in:
Timmy Welch
parent
fb3adaa0a1
commit
5cd3cb8dcf
@ -40,6 +40,7 @@ func getBuf(size, capacity int) []uint8 {
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}
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return buf
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}
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func ToGray(img image.Image, pix []uint8) *image.Gray {
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c := img.Bounds().Dx() * img.Bounds().Dy()
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if cap(pix) < c {
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@ -49,7 +49,6 @@ func TestHashCompute(t *testing.T) {
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} {
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file1, err := os.Open(tt.img1)
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if err != nil {
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}
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defer file1.Close()
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14
imagehash.go
14
imagehash.go
@ -60,7 +60,7 @@ func (h *ImageHash) Distance(other *ImageHash) (int, error) {
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return -1, errNoOther
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}
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if h.GetKind() != other.GetKind() {
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return -1, errors.New("Image hashes's kind should be identical")
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return -1, errors.New("image hashes's kind should be identical")
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}
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lhash := h.GetHash()
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@ -84,8 +84,10 @@ func (h *ImageHash) leftShiftSet(idx int) {
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h.hash |= 1 << uint(idx)
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}
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const strFmtHex = "%1s:%016x"
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const strFmtBin = "%1s:%064b"
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const (
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strFmtHex = "%1s:%016x"
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strFmtBin = "%1s:%064b"
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)
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// Dump method writes a binary serialization into w io.Writer.
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func (h *ImageHash) Dump(w io.Writer) error {
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@ -164,18 +166,18 @@ func (h *ExtImageHash) Bits() int {
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// Distance method returns a distance between two big hashes
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func (h *ExtImageHash) Distance(other *ExtImageHash) (int, error) {
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if h.GetKind() != other.GetKind() {
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return -1, errors.New("Extended Image hashes's kind should be identical")
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return -1, errors.New("extended Image hashes's kind should be identical")
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}
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if h.Bits() != other.Bits() {
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msg := fmt.Sprintf("Extended image hash should has an identical bit size but got %v vs %v", h.Bits(), other.Bits())
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msg := fmt.Sprintf("extended image hash should has an identical bit size but got %v vs %v", h.Bits(), other.Bits())
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return -1, errors.New(msg)
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}
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lHash := h.GetHash()
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rHash := other.GetHash()
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if len(lHash) != len(rHash) {
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return -1, errors.New("Extended Image hashes's size should be identical")
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return -1, errors.New("extended Image hashes's size should be identical")
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}
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distance := 0
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@ -97,6 +97,7 @@ func DCT2DFast64(input *[]float64) (flattens [64]float64) {
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}
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return
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}
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func DCT2DFast32(input *[]float64) (flattens [64]float64) {
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if len(*input) != 32*32 {
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panic("incorrect input size, wanted 32x32.")
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@ -43,18 +43,23 @@ func TestDCT2D(t *testing.T) {
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for _, tt := range []struct {
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input [][]float64
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output [][]float64
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w int
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h int
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w, h int
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}{
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{[][]float64{{1.0, 2.0, 3.0, 4.0},
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{
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[][]float64{
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{1.0, 2.0, 3.0, 4.0},
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{5.0, 6.0, 7.0, 8.0},
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{9.0, 10.0, 11.0, 12.0},
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{13.0, 14.0, 15.0, 16.0}},
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[][]float64{{136.0, -12.6172881195958, 0.0, -0.8966830583359305},
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{13.0, 14.0, 15.0, 16.0},
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},
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[][]float64{
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{136.0, -12.6172881195958, 0.0, -0.8966830583359305},
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{-50.4691524783832, 0.0, 0.0, 0.0},
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{0.0, 0.0, 0.0, 0.0},
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{-3.586732233343722, 0.0, 0.0, 0.0}},
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4, 4},
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{-3.586732233343722, 0.0, 0.0, 0.0},
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},
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4, 4,
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},
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} {
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out := DCT2D(tt.input, tt.w, tt.h)
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pass := true
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@ -86,7 +86,7 @@ func forwardDCT16(input []float64) {
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}
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func forwardDCT8(input []float64) {
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var a, b = [4]float64{}, [4]float64{}
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a, b := [4]float64{}, [4]float64{}
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x0, y0 := input[0], input[7]
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x1, y1 := input[1], input[6]
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@ -159,7 +159,8 @@ var (
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0.7540148204328366, 0.7312259956095479, 0.708327050840981, 0.6853214346239888, 0.6622126115197529, 0.6390040616320315, 0.61569928008307, 0.5923017764872479,
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0.5688150744225436, 0.545242710899898, 0.5215882358305511, 0.4978552114914405, 0.4740472119887347, 0.45016782271958555, 0.4262206398321827, 0.40220926968418386,
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0.37813732829961255, 0.3540084408242977, 0.3298262409799401, 0.3055943705168868, 0.2813164786656985, 0.25699622158758645, 0.23263726182380973, 0.20824326774410945,
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0.1838179129942654, 0.15936487594286025, 0.1348878391273282, 0.11039048869938006, 0.08587651386988192, 0.06134960635327317, 0.03681345981160964, 0.012271769298309032}
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0.1838179129942654, 0.15936487594286025, 0.1348878391273282, 0.11039048869938006, 0.08587651386988192, 0.06134960635327317, 0.03681345981160964, 0.012271769298309032,
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}
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dct128 = [64]float64{
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1.9998494036782892, 1.9986447691766989, 1.9962362258002984, 1.992625224365556, 1.9878139400047121, 1.98180527085556, 1.9746028363157169, 1.9662109748624328,
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1.9566347414392553, 1.9458799044111204, 1.9339529420897041, 1.9208610388311316, 1.9066120807083875, 1.8912146507610426, 1.87467802382515, 1.8570121609464312,
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@ -168,7 +169,8 @@ var (
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1.3967524988179458, 1.3612019955909063, 1.3248315551803436, 1.287663085779583, 1.249718976284773, 1.211022082808651, 1.1715957149128777, 1.1314636215672265,
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1.0906499768440931, 1.049179365356938, 1.0070767674514352, 0.9643675441582458, 0.92107742191648, 0.8772324770770554, 0.8328591201952746, 0.7879840801220962,
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0.7426343879036752, 0.696837360498869, 0.650620584324526, 0.6040118986384564, 0.5570393787701061, 0.5097313192090293, 0.4621162165613425, 0.4142227523844371,
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0.36607977591028207, 0.3177162866677228, 0.26916141701425245, 0.22044441458776637, 0.17159462468887976, 0.12264147260441731, 0.07361444588271798, 0.02454307657143989}
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0.36607977591028207, 0.3177162866677228, 0.26916141701425245, 0.22044441458776637, 0.17159462468887976, 0.12264147260441731, 0.07361444588271798, 0.02454307657143989,
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}
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dct64 = [32]float64{
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1.9993976373924083, 1.9945809133573804, 1.9849590691974202, 1.9705552847778824, 1.9514042600770571, 1.9275521315908797, 1.8990563611860733, 1.8659855976694777,
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1.8284195114070614, 1.7864486023910306, 1.7401739822174227, 1.6897071304994142, 1.6351696263031674, 1.5766928552532127, 1.5144176930129691, 1.448494165902934,
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@ -16,6 +16,7 @@ const (
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func MultHi(v int32, coeff int32) int32 {
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return (v * coeff) >> 8
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}
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func VP8Clip8(v int32) uint8 {
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if (v &^ YUV_MASK2) == 0 {
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return uint8(v >> YUV_FIX2)
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@ -25,15 +26,19 @@ func VP8Clip8(v int32) uint8 {
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}
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return 0xff
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}
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func VP8YUVToR(y uint8, v uint8) uint8 {
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return VP8Clip8(MultHi(int32(y), 19077) + MultHi(int32(v), 26149) - 14234)
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}
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func VP8YUVToG(y uint8, u uint8, v uint8) uint8 {
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return VP8Clip8(MultHi(int32(y), 19077) - MultHi(int32(u), 6419) - MultHi(int32(v), 13320) + 8708)
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}
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func VP8YUVToB(y uint8, u uint8) uint8 {
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return VP8Clip8(MultHi(int32(y), 19077) + MultHi(int32(u), 33050) - 17685)
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}
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func VP8YuvToRgb(y uint8, u uint8, v uint8) (rgb [3]uint8) {
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rgb[0] = uint8(VP8YUVToR(y, v))
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rgb[1] = uint8(VP8YUVToG(y, u, v))
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@ -41,6 +46,7 @@ func VP8YuvToRgb(y uint8, u uint8, v uint8) (rgb [3]uint8) {
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return rgb
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}
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func VP8YuvToBgr(y uint8, u uint8, v uint8) (bgr [3]uint8) {
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bgr[0] = uint8(VP8YUVToB(y, u))
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bgr[1] = uint8(VP8YUVToG(y, u, v))
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@ -48,6 +54,7 @@ func VP8YuvToBgr(y uint8, u uint8, v uint8) (bgr [3]uint8) {
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return bgr
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}
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func VP8YuvToRgb565(y uint8, u uint8, v uint8) (rgb [2]uint8) {
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var (
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r = VP8YUVToR(y, v)
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@ -55,13 +62,14 @@ func VP8YuvToRgb565(y uint8, u uint8, v uint8) (rgb [2]uint8) {
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b = VP8YUVToB(y, u)
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)
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var rg = (r & 0xf8) | (g >> 5)
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var gb = ((g << 3) & 0xe0) | (b >> 3)
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rg := (r & 0xf8) | (g >> 5)
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gb := ((g << 3) & 0xe0) | (b >> 3)
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rgb[0] = uint8(rg)
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rgb[1] = uint8(gb)
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return rgb
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}
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func VP8YuvToRgba4444(y uint8, u uint8, v uint8) (argb [2]uint8) {
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var (
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r = VP8YUVToR(y, v)
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@ -69,13 +77,14 @@ func VP8YuvToRgba4444(y uint8, u uint8, v uint8) (argb [2]uint8) {
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b = VP8YUVToB(y, u)
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)
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var rg = (r & 0xf0) | (g >> 4)
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var ba = (b & 0xf0) | 0x0f // overwrite the lower 4 bits
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rg := (r & 0xf0) | (g >> 4)
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ba := (b & 0xf0) | 0x0f // overwrite the lower 4 bits
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argb[0] = uint8(rg)
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argb[1] = uint8(ba)
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return argb
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}
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func VP8YuvToArgb(y uint8, u uint8, v uint8) (argb [4]uint8) {
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argb[0] = 0xff
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rgb := VP8YuvToRgb(y, u, v)
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@ -83,6 +92,7 @@ func VP8YuvToArgb(y uint8, u uint8, v uint8) (argb [4]uint8) {
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return argb
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}
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func VP8YuvToBgra(y uint8, u uint8, v uint8) (bgra [4]uint8) {
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bgr := VP8YuvToBgr(y, u, v)
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copy(bgra[:], bgr[:])
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@ -90,6 +100,7 @@ func VP8YuvToBgra(y uint8, u uint8, v uint8) (bgra [4]uint8) {
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return bgra
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}
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func VP8YuvToRgba(y uint8, u uint8, v uint8) (rgba [4]uint8) {
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rgb := VP8YuvToRgb(uint8(y), uint8(u), uint8(v))
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copy(rgba[:], rgb[:])
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@ -4,132 +4,132 @@ import (
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"image"
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)
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type WebPUpsampleLinePairFunc func(top_y []uint8, bottom_y []uint8,
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top_u []uint8, top_v []uint8,
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bottom_u []uint8, bottom_v []uint8,
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top_dst []uint8, bottom_dst []uint8, len int)
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type WebPUpsampleLinePairFunc func(topY []uint8, bottomY []uint8,
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topU []uint8, topV []uint8,
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bottomU []uint8, bottomV []uint8,
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topDst []uint8, bottomDst []uint8, len int)
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func FancyUpscale(yuv *image.YCbCr) *image.RGBA {
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rgb := image.NewRGBA(image.Rect(0, 0, yuv.Rect.Dx(), yuv.Rect.Dy()))
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var (
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upsample WebPUpsampleLinePairFunc = UpsampleRgbaLinePair
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last_row int = yuv.Rect.Dy()
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mb_w int = yuv.Rect.Dx()
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lastRow = yuv.Rect.Dy()
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mbW = yuv.Rect.Dx()
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)
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// First line is special cased. We mirror the u/v samples at boundary.
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upsample(yuv.Y[:yuv.YStride], nil,
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yuv.Cb[:yuv.CStride], yuv.Cr[:yuv.CStride],
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yuv.Cb[:yuv.CStride], yuv.Cr[:yuv.CStride],
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rgb.Pix[:rgb.Stride], nil,
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mb_w,
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mbW,
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)
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var (
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top_c int
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bottom_c int
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top_y int
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bottom_y int
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top_dst int
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bottom_dst int
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topC int
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bottomC int
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topY int
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bottomY int
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topDst int
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bottomDst int
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)
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// Loop over each output pairs of row.
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for row := 1; row+1 < last_row; row += 2 {
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top_c = yuv.COffset(0, row)
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bottom_c = top_c + yuv.CStride
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for row := 1; row+1 < lastRow; row += 2 {
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topC = yuv.COffset(0, row)
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bottomC = topC + yuv.CStride
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top_y = yuv.YOffset(0, row)
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bottom_y = top_y + yuv.YStride
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topY = yuv.YOffset(0, row)
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bottomY = topY + yuv.YStride
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top_dst = rgb.PixOffset(0, row)
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bottom_dst = top_dst + rgb.Stride
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topDst = rgb.PixOffset(0, row)
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bottomDst = topDst + rgb.Stride
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upsample(yuv.Y[top_y:bottom_y], yuv.Y[bottom_y:bottom_y+yuv.YStride],
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yuv.Cb[top_c:bottom_c], yuv.Cr[top_c:bottom_c],
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yuv.Cb[bottom_c:bottom_c+yuv.CStride], yuv.Cr[bottom_c:bottom_c+yuv.CStride],
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rgb.Pix[top_dst:bottom_dst], rgb.Pix[bottom_dst:bottom_dst+rgb.Stride],
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mb_w,
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upsample(yuv.Y[topY:bottomY], yuv.Y[bottomY:bottomY+yuv.YStride],
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yuv.Cb[topC:bottomC], yuv.Cr[topC:bottomC],
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yuv.Cb[bottomC:bottomC+yuv.CStride], yuv.Cr[bottomC:bottomC+yuv.CStride],
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rgb.Pix[topDst:bottomDst], rgb.Pix[bottomDst:bottomDst+rgb.Stride],
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mbW,
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)
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}
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// Process the very last row of even-sized picture
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if last_row%2 == 0 {
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if lastRow%2 == 0 {
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upsample(yuv.Y[len(yuv.Y)-yuv.YStride:], nil,
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yuv.Cb[len(yuv.Cb)-yuv.CStride:], yuv.Cr[len(yuv.Cr)-yuv.CStride:],
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yuv.Cb[len(yuv.Cb)-yuv.CStride:], yuv.Cr[len(yuv.Cr)-yuv.CStride:],
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rgb.Pix[len(rgb.Pix)-rgb.Stride:], nil,
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mb_w,
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mbW,
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)
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}
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return rgb
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}
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func UpsampleRgbaLinePair(top_y []uint8, bottom_y []uint8,
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top_u []uint8, top_v []uint8,
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bottom_u []uint8, bottom_v []uint8,
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top_dst []uint8, bottom_dst []uint8, rowLength int,
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func UpsampleRgbaLinePair(topY []uint8, bottomY []uint8,
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topU []uint8, topV []uint8,
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bottomU []uint8, bottomV []uint8,
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topDst []uint8, bottomDst []uint8, rowLength int,
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) {
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var (
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x int
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last_pixel_pair int = (rowLength - 1) >> 1
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tl_uv uint32 = (uint32(top_u[0]) | (uint32(top_v[0]) << 16)) /* top-left sample */
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l_uv uint32 = (uint32(bottom_u[0]) | (uint32(bottom_v[0]) << 16)) /* left-sample */
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lastPixelPair = (rowLength - 1) >> 1
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tlUV = (uint32(topU[0]) | (uint32(topV[0]) << 16)) /* top-left sample */
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lUV = (uint32(bottomU[0]) | (uint32(bottomV[0]) << 16)) /* left-sample */
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)
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{
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var uv0 uint32 = (3*tl_uv + l_uv + 0x00020002) >> 2
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dst := VP8YuvToRgba(top_y[0], uint8(uv0&0xff), uint8((uv0 >> 16)))
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copy(top_dst[0:], dst[:])
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uv0 := (3*tlUV + lUV + 0x00020002) >> 2
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dst := VP8YuvToRgba(topY[0], uint8(uv0&0xff), uint8((uv0 >> 16)))
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copy(topDst[0:], dst[:])
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}
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if bottom_y != nil {
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var uv0 uint32 = (3*l_uv + tl_uv + 0x00020002) >> 2
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dst := VP8YuvToRgba(bottom_y[0], uint8(uv0&0xff), uint8(uv0>>16))
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copy(bottom_dst[0:], dst[:])
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if bottomY != nil {
|
||||
uv0 := (3*lUV + tlUV + 0x00020002) >> 2
|
||||
dst := VP8YuvToRgba(bottomY[0], uint8(uv0&0xff), uint8(uv0>>16))
|
||||
copy(bottomDst[0:], dst[:])
|
||||
}
|
||||
|
||||
for x = 1; x <= last_pixel_pair; x++ {
|
||||
for x = 1; x <= lastPixelPair; x++ {
|
||||
var (
|
||||
t_uv uint32 = (uint32(top_u[x]) | (uint32(top_v[x]) << 16)) /* top sample */
|
||||
uv uint32 = (uint32(bottom_u[x]) | (uint32(bottom_v[x]) << 16)) /* sample */
|
||||
tUV = (uint32(topU[x]) | (uint32(topV[x]) << 16)) /* top sample */
|
||||
uv = (uint32(bottomU[x]) | (uint32(bottomV[x]) << 16)) /* sample */
|
||||
|
||||
/* precompute invariant values associated with first and second diagonals*/
|
||||
avg uint32 = tl_uv + t_uv + l_uv + uv + 0x00080008
|
||||
diag_12 uint32 = (avg + 2*(t_uv+l_uv)) >> 3
|
||||
diag_03 uint32 = (avg + 2*(tl_uv+uv)) >> 3
|
||||
avg = tlUV + tUV + lUV + uv + 0x00080008
|
||||
diag12 = (avg + 2*(tUV+lUV)) >> 3
|
||||
diag03 = (avg + 2*(tlUV+uv)) >> 3
|
||||
)
|
||||
{
|
||||
var (
|
||||
uv0 uint32 = (diag_12 + tl_uv) >> 1
|
||||
uv1 uint32 = (diag_03 + t_uv) >> 1
|
||||
uv0 = (diag12 + tlUV) >> 1
|
||||
uv1 = (diag03 + tUV) >> 1
|
||||
)
|
||||
dst := VP8YuvToRgba(top_y[2*x-1], uint8(uv0&0xff), uint8(uv0>>16))
|
||||
copy(top_dst[(2*x-1)*4:], dst[:])
|
||||
dst = VP8YuvToRgba(top_y[2*x-0], uint8(uv1&0xff), uint8(uv1>>16))
|
||||
copy(top_dst[(2*x-0)*4:], dst[:])
|
||||
dst := VP8YuvToRgba(topY[2*x-1], uint8(uv0&0xff), uint8(uv0>>16))
|
||||
copy(topDst[(2*x-1)*4:], dst[:])
|
||||
dst = VP8YuvToRgba(topY[2*x-0], uint8(uv1&0xff), uint8(uv1>>16))
|
||||
copy(topDst[(2*x-0)*4:], dst[:])
|
||||
}
|
||||
if bottom_y != nil {
|
||||
if bottomY != nil {
|
||||
var (
|
||||
uv0 uint32 = (diag_03 + l_uv) >> 1
|
||||
uv1 uint32 = (diag_12 + uv) >> 1
|
||||
uv0 = (diag03 + lUV) >> 1
|
||||
uv1 = (diag12 + uv) >> 1
|
||||
)
|
||||
dst := VP8YuvToRgba(bottom_y[2*x-1], uint8(uv0&0xff), uint8(uv0>>16))
|
||||
copy(bottom_dst[(2*x-1)*4:], dst[:])
|
||||
dst = VP8YuvToRgba(bottom_y[2*x+0], uint8(uv1&0xff), uint8(uv1>>16))
|
||||
copy(bottom_dst[(2*x+0)*4:], dst[:])
|
||||
dst := VP8YuvToRgba(bottomY[2*x-1], uint8(uv0&0xff), uint8(uv0>>16))
|
||||
copy(bottomDst[(2*x-1)*4:], dst[:])
|
||||
dst = VP8YuvToRgba(bottomY[2*x+0], uint8(uv1&0xff), uint8(uv1>>16))
|
||||
copy(bottomDst[(2*x+0)*4:], dst[:])
|
||||
}
|
||||
tl_uv = t_uv
|
||||
l_uv = uv
|
||||
tlUV = tUV
|
||||
lUV = uv
|
||||
}
|
||||
if rowLength%2 == 0 {
|
||||
{
|
||||
var uv0 uint32 = (3*tl_uv + l_uv + 0x00020002) >> 2
|
||||
dst := VP8YuvToRgba(top_y[rowLength-1], uint8(uv0&0xff), uint8(uv0>>16))
|
||||
copy(top_dst[(rowLength-1)*4:], dst[:])
|
||||
uv0 := (3*tlUV + lUV + 0x00020002) >> 2
|
||||
dst := VP8YuvToRgba(topY[rowLength-1], uint8(uv0&0xff), uint8(uv0>>16))
|
||||
copy(topDst[(rowLength-1)*4:], dst[:])
|
||||
}
|
||||
if bottom_y != nil {
|
||||
var uv0 uint32 = (3*l_uv + tl_uv + 0x00020002) >> 2
|
||||
dst := VP8YuvToRgba(bottom_y[rowLength-1], uint8(uv0&0xff), uint8(uv0>>16))
|
||||
copy(bottom_dst[(rowLength-1)*4:], dst[:])
|
||||
if bottomY != nil {
|
||||
uv0 := (3*lUV + tlUV + 0x00020002) >> 2
|
||||
dst := VP8YuvToRgba(bottomY[rowLength-1], uint8(uv0&0xff), uint8(uv0>>16))
|
||||
copy(bottomDst[(rowLength-1)*4:], dst[:])
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user