From 54bdbefd121263644719759c9432092029ee8289 Mon Sep 17 00:00:00 2001 From: Milan Nikolic Date: Sun, 23 May 2021 20:51:53 +0200 Subject: [PATCH] Optimize ToYCbCr --- encode.go | 4 +- ycbcr.go | 23 +++++- yuv/LICENSE | 213 ++++++++++++++++++++++++++++++++++++++++++++++++ yuv/README | 1 + yuv/go.mod | 3 + yuv/options.go | 42 ++++++++++ yuv/yuv.c | 143 ++++++++++++++++++++++++++++++++ yuv/yuv.go | 138 +++++++++++++++++++++++++++++++ yuv/yuv.h | 23 ++++++ yuv/yuv_test.go | 202 +++++++++++++++++++++++++++++++++++++++++++++ 10 files changed, 788 insertions(+), 4 deletions(-) create mode 100644 yuv/LICENSE create mode 100644 yuv/README create mode 100644 yuv/go.mod create mode 100644 yuv/options.go create mode 100644 yuv/yuv.c create mode 100644 yuv/yuv.go create mode 100644 yuv/yuv.h create mode 100644 yuv/yuv_test.go diff --git a/encode.go b/encode.go index 5e5d2ff..761943d 100644 --- a/encode.go +++ b/encode.go @@ -144,8 +144,8 @@ func NewEncoder(w io.Writer, opts *Options) (e *Encoder, err error) { func (e *Encoder) Encode(im image.Image) (err error) { var picOut x264c.Picture - _, ok := im.(*image.RGBA) - if ok { + _, rgba := im.(*image.RGBA) + if rgba { e.img.ToYCbCr(im) } else { e.img.ToYCbCrDraw(im) diff --git a/ycbcr.go b/ycbcr.go index 8e85283..a50ba12 100644 --- a/ycbcr.go +++ b/ycbcr.go @@ -4,6 +4,8 @@ import ( "image" "image/color" "image/draw" + + "github.com/gen2brain/x264-go/yuv" ) // YCbCr is an in-memory image of Y'CbCr colors. @@ -40,8 +42,8 @@ func (p *YCbCr) ToYCbCrDraw(src image.Image) { draw.Draw(p, bounds, src, bounds.Min, draw.Src) } -// ToYCbCr converts image.Image to YCbCr. -func (p *YCbCr) ToYCbCr(src image.Image) { +// ToYCbCrColor converts image.Image to YCbCr. +func (p *YCbCr) ToYCbCrColor(src image.Image) { bounds := src.Bounds() for row := 0; row < bounds.Max.Y; row++ { @@ -55,3 +57,20 @@ func (p *YCbCr) ToYCbCr(src image.Image) { } } } + +// ToYCbCr converts image.Image to YCbCr. +func (p *YCbCr) ToYCbCr(src image.Image) { + bounds := src.Bounds() + width := bounds.Dx() + height := bounds.Dy() + + lumaSize := int32(width * height) + chromaSize := int32(width*height) / 4 + + yuvProc := yuv.NewYuvImgProcessor(width, height) + yCbCr := yuvProc.Process(src.(*image.RGBA)).Get() + + p.Y = yCbCr[:lumaSize] + p.Cb = yCbCr[lumaSize : lumaSize+chromaSize] + p.Cr = yCbCr[lumaSize+chromaSize:] +} diff --git a/yuv/LICENSE b/yuv/LICENSE new file mode 100644 index 0000000..f1d7177 --- /dev/null +++ b/yuv/LICENSE @@ -0,0 +1,213 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright [2019] [Nguyen Huu Thanh] + + 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. + +------------------------------------------------------------------------------------ +This product bundles various third-party components under other open source licenses. + +MIT License +----------- + +https://github.com/pion/webrtc/ +https://github.com/fogleman/nes +https://github.com/poi5305/go-yuv2webRTC +https://github.com/bchanx/animated-gameboy-in-css + diff --git a/yuv/README b/yuv/README new file mode 100644 index 0000000..4cc06cd --- /dev/null +++ b/yuv/README @@ -0,0 +1 @@ +Imported from https://github.com/giongto35/cloud-game/tree/master/pkg/encoder/yuv diff --git a/yuv/go.mod b/yuv/go.mod new file mode 100644 index 0000000..a48379d --- /dev/null +++ b/yuv/go.mod @@ -0,0 +1,3 @@ +module github.com/gen2brain/x264-go/yuv + +go 1.16 diff --git a/yuv/options.go b/yuv/options.go new file mode 100644 index 0000000..1f53ecf --- /dev/null +++ b/yuv/options.go @@ -0,0 +1,42 @@ +package yuv + +type Options struct { + ChromaP ChromaPos + Threaded bool + Threads int +} + +func (o *Options) override(options ...Option) { + for _, opt := range options { + opt(o) + } +} + +type Option func(*Options) + +func Threaded(t bool) Option { + return func(opts *Options) { + opts.Threaded = t + } +} + +func Threads(t int) Option { + return func(opts *Options) { + opts.Threads = t + } +} + +func ChromaP(cp ChromaPos) Option { + return func(opts *Options) { + opts.ChromaP = cp + } +} + +// WithOptions used for config files. +func WithOptions(arg Options) Option { + return func(args *Options) { + args.ChromaP = arg.ChromaP + args.Threaded = arg.Threaded + args.Threads = arg.Threads + } +} diff --git a/yuv/yuv.c b/yuv/yuv.c new file mode 100644 index 0000000..d6ccb2c --- /dev/null +++ b/yuv/yuv.c @@ -0,0 +1,143 @@ +#include "yuv.h" + +// based on: https://stackoverflow.com/questions/9465815/rgb-to-yuv420-algorithm-efficiency + +// Converts RGBA image to YUV (I420) with BT.601 studio color range. +void rgbaToYuv(void *destination, void *source, int width, int height, chromaPos chroma) { + const int image_size = width * height; + unsigned char *rgba = source; + unsigned char *dst_y = destination; + unsigned char *dst_u = destination + image_size; + unsigned char *dst_v = destination + image_size + image_size / 4; + + int r1, g1, b1, stride; + // Y plane + for (int y = 0; y < height; ++y) { + stride = 4 * y * width; + for (int x = 0; x < width; ++x) { + r1 = 4 * x + stride; + g1 = r1 + 1; + b1 = g1 + 1; + *dst_y++ = ((66 * rgba[r1] + 129 * rgba[g1] + 25 * rgba[b1]) >> 8) + 16; + } + } + + // U+V plane + if (chroma == TOP_LEFT) { + for (int y = 0; y < height; y += 2) { + stride = 4 * y * width; + for (int x = 0; x < width; x += 2) { + r1 = 4 * x + stride; + g1 = r1 + 1; + b1 = g1 + 1; + *dst_u++ = ((-38 * rgba[r1] + -74 * rgba[g1] + 112 * rgba[b1]) >> 8) + 128; + *dst_v++ = ((112 * rgba[r1] + -94 * rgba[g1] + -18 * rgba[b1]) >> 8) + 128; + } + } + } else if (chroma == BETWEEN_FOUR) { + int r2, g2, b2, r3, g3, b3, r4, g4, b4; + + for (int y = 0; y < height; y += 2) { + stride = 4 * y * width; + for (int x = 0; x < width; x += 2) { + // (1 2) x x + // x x x x + r1 = 4 * x + stride; + g1 = r1 + 1; + b1 = g1 + 1; + r2 = r1 + 4; + g2 = r2 + 1; + b2 = g2 + 1; + // x x x x + // (3 4) x x + r3 = r1 + 4 * width; + + g3 = r3 + 1; + b3 = g3 + 1; + r4 = r3 + 4; + g4 = r4 + 1; + b4 = g4 + 1; + *dst_u++ = (((-38 * rgba[r1] + -74 * rgba[g1] + 112 * rgba[b1]) >> 8) + + ((-38 * rgba[r2] + -74 * rgba[g2] + 112 * rgba[b2]) >> 8) + + ((-38 * rgba[r3] + -74 * rgba[g3] + 112 * rgba[b3]) >> 8) + + ((-38 * rgba[r4] + -74 * rgba[g4] + 112 * rgba[b4]) >> 8) + 512) >> 2; + *dst_v++ = (((112 * rgba[r1] + -94 * rgba[g1] + -18 * rgba[b1]) >> 8) + + ((112 * rgba[r2] + -94 * rgba[g2] + -18 * rgba[b2]) >> 8) + + ((112 * rgba[r3] + -94 * rgba[g3] + -18 * rgba[b3]) >> 8) + + ((112 * rgba[r4] + -94 * rgba[g4] + -18 * rgba[b4]) >> 8) + 512) >> 2; + } + } + } +} + +void chroma(void *destination, void *source, int pos, int deu, int dev, int width, int height, chromaPos chroma) { + unsigned char *rgba = source + 4 * pos; + unsigned char *dst_u = destination + deu + pos / 4; + unsigned char *dst_v = destination + dev + pos / 4; + + int r1, g1, b1, stride; + + // U+V plane + if (chroma == TOP_LEFT) { + for (int y = 0; y < height; y += 2) { + stride = 4 * y * width; + for (int x = 0; x < width; x += 2) { + r1 = 4 * x + stride; + g1 = r1 + 1; + b1 = g1 + 1; + *dst_u++ = ((-38 * rgba[r1] + -74 * rgba[g1] + 112 * rgba[b1]) >> 8) + 128; + *dst_v++ = ((112 * rgba[r1] + -94 * rgba[g1] + -18 * rgba[b1]) >> 8) + 128; + } + } + } else if (chroma == BETWEEN_FOUR) { + int r2, g2, b2, r3, g3, b3, r4, g4, b4; + + for (int y = 0; y < height; y += 2) { + stride = 4 * y * width; + for (int x = 0; x < width; x += 2) { + // (1 2) x x + // x x x x + r1 = 4 * x + stride; + g1 = r1 + 1; + b1 = g1 + 1; + r2 = r1 + 4; + g2 = r2 + 1; + b2 = g2 + 1; + // x x x x + // (3 4) x x + r3 = r1 + 4 * width; + g3 = r3 + 1; + b3 = g3 + 1; + r4 = r3 + 4; + g4 = r4 + 1; + b4 = g4 + 1; + *dst_u++ = (((-38 * rgba[r1] + -74 * rgba[g1] + 112 * rgba[b1]) >> 8) + + ((-38 * rgba[r2] + -74 * rgba[g2] + 112 * rgba[b2]) >> 8) + + ((-38 * rgba[r3] + -74 * rgba[g3] + 112 * rgba[b3]) >> 8) + + ((-38 * rgba[r4] + -74 * rgba[g4] + 112 * rgba[b4]) >> 8) + 512) >> 2; + *dst_v++ = (((112 * rgba[r1] + -94 * rgba[g1] + -18 * rgba[b1]) >> 8) + + ((112 * rgba[r2] + -94 * rgba[g2] + -18 * rgba[b2]) >> 8) + + ((112 * rgba[r3] + -94 * rgba[g3] + -18 * rgba[b3]) >> 8) + + ((112 * rgba[r4] + -94 * rgba[g4] + -18 * rgba[b4]) >> 8) + 512) >> 2; + } + } + } +} + +void luma(void *destination, void *source, int pos, int width, int height) { + unsigned char *rgba = source + 4 * pos; + unsigned char *dst_y = destination + pos; + + int x, y, r1, g1, b1, stride; + + // Y plane + for (y = 0; y < height; ++y) { + stride = 4 * y * width; + for (x = 0; x < width; ++x) { + r1 = 4 * x + stride; + g1 = r1 + 1; + b1 = g1 + 1; + *dst_y++ = 16 + ((66 * rgba[r1] + 129 * rgba[g1] + 25 * rgba[b1]) >> 8); + } + } +} diff --git a/yuv/yuv.go b/yuv/yuv.go new file mode 100644 index 0000000..5c453fc --- /dev/null +++ b/yuv/yuv.go @@ -0,0 +1,138 @@ +package yuv + +import ( + "image" + "runtime" + "sync" + "unsafe" +) + +/* +#cgo CFLAGS: -Wall -O3 +#include "yuv.h" +*/ +import "C" + +type ImgProcessor interface { + Process(rgba *image.RGBA) ImgProcessor + Get() []byte +} + +type processor struct { + Data []byte + w, h int + pos ChromaPos + + // cache + dst unsafe.Pointer + ww C.int + chroma C.chromaPos +} + +type threadedProcessor struct { + *processor + + // threading + threads int + chunk int + + // cache + chromaU C.int + chromaV C.int +} + +type ChromaPos uint8 + +const ( + TopLeft ChromaPos = iota + BetweenFour +) + +// NewYuvImgProcessor creates new YUV image converter from RGBA. +func NewYuvImgProcessor(w, h int, options ...Option) ImgProcessor { + opts := &Options{ + ChromaP: BetweenFour, + Threaded: true, + Threads: runtime.NumCPU(), + } + opts.override(options...) + + bufSize := int(float32(w*h) * 1.5) + buf := make([]byte, bufSize) + + processor := processor{ + Data: buf, + chroma: C.chromaPos(opts.ChromaP), + dst: unsafe.Pointer(&buf[0]), + h: h, + pos: opts.ChromaP, + w: w, + ww: C.int(w), + } + + if opts.Threaded { + // chunks the image evenly + chunk := h / opts.Threads + if chunk%2 != 0 { + chunk-- + } + + return &threadedProcessor{ + chromaU: C.int(w * h), + chromaV: C.int(w*h + w*h/4), + chunk: chunk, + processor: &processor, + threads: opts.Threads, + } + } + return &processor +} + +func (yuv *processor) Get() []byte { + return yuv.Data +} + +// Process converts RGBA colorspace into YUV I420 format inside the internal buffer. +// Non-threaded version. +func (yuv *processor) Process(rgba *image.RGBA) ImgProcessor { + C.rgbaToYuv(yuv.dst, unsafe.Pointer(&rgba.Pix[0]), yuv.ww, C.int(yuv.h), yuv.chroma) + return yuv +} + +func (yuv *threadedProcessor) Get() []byte { + return yuv.Data +} + +// Process converts RGBA colorspace into YUV I420 format inside the internal buffer. +// Threaded version. +// +// We divide the input image into chunks by the number of available CPUs. +// Each chunk should contain 2, 4, 6, and etc. rows of the image. +// +// 8x4 CPU (2) +// x x x x x x x x | Coroutine 1 +// x x x x x x x x | Coroutine 1 +// x x x x x x x x | Coroutine 2 +// x x x x x x x x | Coroutine 2 +// +func (yuv *threadedProcessor) Process(rgba *image.RGBA) ImgProcessor { + src := unsafe.Pointer(&rgba.Pix[0]) + wg := sync.WaitGroup{} + wg.Add(2 * yuv.threads) + for i := 0; i < yuv.threads; i++ { + pos, hh := C.int(yuv.w*i*yuv.chunk), C.int(yuv.chunk) + // we need to know how many pixels left + // if the image can't be divided evenly + // between all the threads + if i == yuv.threads-1 { + hh = C.int(yuv.h - i*yuv.chunk) + } + go func() { defer wg.Done(); C.luma(yuv.dst, src, pos, yuv.ww, hh) }() + go func() { + defer wg.Done() + C.chroma(yuv.dst, src, pos, yuv.chromaU, yuv.chromaV, yuv.ww, hh, yuv.chroma) + }() + } + wg.Wait() + return yuv +} diff --git a/yuv/yuv.h b/yuv/yuv.h new file mode 100644 index 0000000..dbea859 --- /dev/null +++ b/yuv/yuv.h @@ -0,0 +1,23 @@ +typedef enum { + // It will take each TL pixel for chroma values. + // XO X XO X + // X X X X + TOP_LEFT = 0, + // It will take an average color from the 2x2 pixel group for chroma values. + // X X X X + // O O + // X X X X + BETWEEN_FOUR = 1 +} chromaPos; + +// Converts RGBA image to YUV (I420) with BT.601 studio color range. +void rgbaToYuv(void *destination, void *source, int width, int height, chromaPos chroma); + +// Converts RGBA image chunk to YUV (I420) chroma with BT.601 studio color range. +// pos contains a shift value for chunks. +// deu, dev contains constant shifts for U, V planes in the resulting array. +// chroma (0, 1) selects chroma estimation algorithm. +void chroma(void *destination, void *source, int pos, int deu, int dev, int width, int height, chromaPos chroma); + +// Converts RGBA image chunk to YUV (I420) luma with BT.601 studio color range. +void luma(void *destination, void *source, int pos, int width, int height); diff --git a/yuv/yuv_test.go b/yuv/yuv_test.go new file mode 100644 index 0000000..977e3a2 --- /dev/null +++ b/yuv/yuv_test.go @@ -0,0 +1,202 @@ +package yuv + +import ( + "image" + "image/color" + "math/rand" + "reflect" + "testing" + "time" +) + +func TestYuv(t *testing.T) { + size1, size2 := 32, 32 + for i := 1; i < 100; i++ { + img := generateImage(size1, size2, randomColor()) + pc := NewYuvImgProcessor(size1, size2, Threaded(false)) + pct := NewYuvImgProcessor(size1, size2, Threaded(true)) + + pc.Process(img) + pct.Process(img) + + if !reflect.DeepEqual(pc.Get(), pct.Get()) { + t.Fatalf("couldn't convert %v, \n %v \n %v", img.Pix, pc.Get(), pct.Get()) + } + } +} + +func TestYuvPredefined(t *testing.T) { + im := []uint8{101, 0, 106, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 101, 0, 106, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 101, 0, 106, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 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226, 78, 255, 18, 226, 78, 255, 18, 226, 78, 255} + should := []byte{ + 52, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, + 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 52, 142, + 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, + 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 52, 142, 142, 142, + 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, + 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 52, 142, 142, 142, 142, 142, + 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, + 142, 142, 142, 142, 142, 142, 142, 142, 142, 52, 142, 142, 142, 142, 142, 142, 142, + 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, + 142, 142, 142, 142, 142, 142, 142, 52, 142, 142, 142, 142, 142, 142, 142, 142, 142, + 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 142, 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94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, + 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, + 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, + 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, 94, + 94, 94, 94, 94, 94, 94, 94, 94, 94, 105, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, + 47, 47, 47, 47, 105, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 105, + 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 105, 47, 47, 47, 47, 47, + 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 105, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, + 47, 47, 47, 47, 47, 105, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, + 105, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 105, 47, 47, 47, 47, + 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 76, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, + 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, + 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, + 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, + 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, + 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, 47, + 47, 47, 47, 47, 47, 47, 47, + } + + pc := NewYuvImgProcessor(32, 32, Threaded(false)) + pct := NewYuvImgProcessor(32, 32, Threaded(true)) + + img := image.NewRGBA(image.Rect(0, 0, 32, 32)) + img.Pix = im + + pc.Process(img) + pct.Process(img) + + if !reflect.DeepEqual(pc.Get(), should) { + t.Fatalf("couldn't convert with base %v \n %v", pc.Get(), should) + } + + if !reflect.DeepEqual(pct.Get(), should) { + for i := 0; i < len(pct.Get()); i++ { + if pct.Get()[i] != should[i] { + t.Logf("index is: %v", i) + } + } + t.Fatalf("couldn't convert with threaded %v \n %v", pct.Get(), should) + } +} + +func generateImage(w, h int, pixelColor color.RGBA) *image.RGBA { + img := image.NewRGBA(image.Rect(0, 0, w, h)) + for x := 0; x < w; x++ { + for y := 0; y < h; y++ { + img.Set(x, y, randomColor()) + } + } + return img +} + +func randomColor() color.RGBA { + rnd := rand.New(rand.NewSource(time.Now().Unix())) + return color.RGBA{ + R: uint8(rnd.Intn(255)), + G: uint8(rnd.Intn(255)), + B: uint8(rnd.Intn(255)), + A: 255, + } +} + +func BenchmarkTopLeft(b *testing.B) { + benchmarkConverter(1920, 1080, 0, true, b) +} + +func BenchmarkBetweenFour(b *testing.B) { + benchmarkConverter(1920, 1080, 1, true, b) +} + +func BenchmarkBetweenFourNonThreaded(b *testing.B) { + benchmarkConverter(1920, 1080, 1, false, b) +} + +func benchmarkConverter(w, h int, chroma ChromaPos, threaded bool, b *testing.B) { + b.StopTimer() + + pc := NewYuvImgProcessor(w, h, ChromaP(chroma), Threaded(threaded)) + + image1 := genTestImage(w, h, rand.New(rand.NewSource(int64(1))).Float32()) + image2 := genTestImage(w, h, rand.New(rand.NewSource(int64(2))).Float32()) + + for i := 0; i < b.N; i++ { + im := image1 + if i%2 == 0 { + im = image2 + } + b.StartTimer() + pc.Process(im) + b.StopTimer() + b.SetBytes(int64(len(im.Pix))) + } +} + +func genTestImage(w, h int, seed float32) *image.RGBA { + img := image.NewRGBA(image.Rectangle{Max: image.Point{X: w, Y: h}}) + for x := 0; x < w; x++ { + for y := 0; y < h; y++ { + col := color.RGBA{R: uint8(seed * 255), G: uint8(seed * 255), B: uint8(seed * 255), A: 0xff} + img.Set(x, y, col) + } + } + return img +}