Add several more values to SkYUVColorSpace
Includes full-range Rec709 and BT2020, as well as more precise matrices for 10 and 12 bit BT2020. Bug: chromium:1108626 Change-Id: I28cbce982a00c082c8b510dbb7b144bdc1ce02e0 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/305596 Reviewed-by: Dale Curtis <dalecurtis@google.com> Reviewed-by: Robert Phillips <robertphillips@google.com> Commit-Queue: Brian Osman <brianosman@google.com>
This commit is contained in:
Brian Osman
Skia Commit-Bot
parent
131c5ad6f1
commit
b107a11f88
@ -967,7 +967,9 @@ static sk_sp<SkImage> make_yuv_gen_image(const SkImageInfo& ii,
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}
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static void draw_col_label(SkCanvas* canvas, int x, int yuvColorSpace, bool opaque) {
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static const char* kYUVColorSpaceNames[] = { "JPEG", "601", "709", "2020", "Identity" };
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static const char* kYUVColorSpaceNames[] = {"JPEG", "601", "709F", "709L",
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"2020_8F", "2020_8L", "2020_10F", "2020_10L",
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"2020_12F", "2020_12L", "Identity"};
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static_assert(SK_ARRAY_COUNT(kYUVColorSpaceNames) == kLastEnum_SkYUVColorSpace + 1);
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SkPaint paint;
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@ -139,20 +139,32 @@ SK_API bool SkColorTypeValidateAlphaType(SkColorType colorType, SkAlphaType alph
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YUV to RGB.
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JPEG YUV values encode the full range of 0 to 255 for all three components.
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Video YUV values range from 16 to 235 for Y and from 16 to 240 for U and V.
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Video YUV values often range from 16 to 235 for Y and from 16 to 240 for U and V (limited).
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Details of encoding and conversion to RGB are described in YCbCr color space.
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The identity colorspace exists to provide a utility mapping from Y to R, U to G and V to B.
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It can be used to visualize the YUV planes or to explicitly post process the YUV channels.
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*/
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enum SkYUVColorSpace {
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kJPEG_SkYUVColorSpace, //!< describes full range
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kRec601_SkYUVColorSpace, //!< describes SDTV range
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kRec709_SkYUVColorSpace, //!< describes HDTV range
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kBT2020_SkYUVColorSpace, //!< describes UHDTV range, non-constant-luminance
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kJPEG_Full_SkYUVColorSpace, //!< describes full range
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kRec601_Limited_SkYUVColorSpace, //!< describes SDTV range
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kRec709_Full_SkYUVColorSpace, //!< describes HDTV range
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kRec709_Limited_SkYUVColorSpace,
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kBT2020_8bit_Full_SkYUVColorSpace, //!< describes UHDTV range, non-constant-luminance
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kBT2020_8bit_Limited_SkYUVColorSpace,
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kBT2020_10bit_Full_SkYUVColorSpace,
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kBT2020_10bit_Limited_SkYUVColorSpace,
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kBT2020_12bit_Full_SkYUVColorSpace,
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kBT2020_12bit_Limited_SkYUVColorSpace,
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kIdentity_SkYUVColorSpace, //!< maps Y->R, U->G, V->B
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kLastEnum_SkYUVColorSpace = kIdentity_SkYUVColorSpace, //!< last valid value
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// Legacy (deprecated) names:
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kJPEG_SkYUVColorSpace = kJPEG_Full_SkYUVColorSpace,
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kRec601_SkYUVColorSpace = kRec601_Limited_SkYUVColorSpace,
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kRec709_SkYUVColorSpace = kRec709_Limited_SkYUVColorSpace,
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kBT2020_SkYUVColorSpace = kBT2020_8bit_Limited_SkYUVColorSpace,
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};
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/** \struct SkColorInfo
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@ -10,73 +10,162 @@
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// in SkColorMatrix order (row-major)
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// Created by running SkColorMatrix_DumpYUVMatrixTables()
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const float Rec709_rgb_to_yuv[] = {
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0.182586f, 0.614231f, 0.062007f, 0.000000f, 0.062745f,
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-0.100644f, -0.338572f, 0.439216f, 0.000000f, 0.501961f,
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0.439216f, -0.398942f, -0.040274f, 0.000000f, 0.501961f,
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0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f,
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const float JPEG_full_rgb_to_yuv[] = {
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0.299000f, 0.587000f, 0.114000f, 0.000000f, 0.000000f,
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-0.168736f, -0.331264f, 0.500000f, 0.000000f, 0.501961f,
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0.500000f, -0.418688f, -0.081312f, 0.000000f, 0.501961f,
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0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f,
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};
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const float Rec709_yuv_to_rgb[] = {
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1.164384f, 0.000000f, 1.792741f, 0.000000f, -0.972945f,
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1.164384f, -0.213249f, -0.532909f, 0.000000f, 0.301483f,
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1.164384f, 2.112402f, 0.000000f, 0.000000f, -1.133402f,
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0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f,
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const float JPEG_full_yuv_to_rgb[] = {
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1.000000f, -0.000000f, 1.402000f, 0.000000f, -0.703749f,
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1.000000f, -0.344136f, -0.714136f, 0.000000f, 0.531211f,
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1.000000f, 1.772000f, 0.000000f, 0.000000f, -0.889475f,
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0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f,
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};
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const float Rec601_rgb_to_yuv[] = {
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0.256788f, 0.504129f, 0.097906f, 0.000000f, 0.062745f,
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-0.148223f, -0.290993f, 0.439216f, 0.000000f, 0.501961f,
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0.439216f, -0.367788f, -0.071427f, 0.000000f, 0.501961f,
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0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f,
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const float Rec601_limited_rgb_to_yuv[] = {
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0.256788f, 0.504129f, 0.097906f, 0.000000f, 0.062745f,
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-0.148223f, -0.290993f, 0.439216f, 0.000000f, 0.501961f,
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0.439216f, -0.367788f, -0.071427f, 0.000000f, 0.501961f,
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0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f,
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};
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const float Rec601_yuv_to_rgb[] = {
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1.164384f, 0.000000f, 1.596027f, 0.000000f, -0.874202f,
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1.164384f, -0.391762f, -0.812968f, 0.000000f, 0.531668f,
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1.164384f, 2.017232f, 0.000000f, 0.000000f, -1.085631f,
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0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f,
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const float Rec601_limited_yuv_to_rgb[] = {
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1.164384f, -0.000000f, 1.596027f, 0.000000f, -0.874202f,
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1.164384f, -0.391762f, -0.812968f, 0.000000f, 0.531668f,
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1.164384f, 2.017232f, 0.000000f, 0.000000f, -1.085631f,
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0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f,
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};
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const float JPEG_rgb_to_yuv[] = {
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0.299000f, 0.587000f, 0.114000f, 0.000000f, 0.000000f,
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-0.168736f, -0.331264f, 0.500000f, 0.000000f, 0.501961f,
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0.500000f, -0.418688f, -0.081312f, 0.000000f, 0.501961f,
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0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f,
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const float Rec709_full_rgb_to_yuv[] = {
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0.212600f, 0.715200f, 0.072200f, 0.000000f, 0.000000f,
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-0.114572f, -0.385428f, 0.500000f, 0.000000f, 0.501961f,
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0.500000f, -0.454153f, -0.045847f, 0.000000f, 0.501961f,
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0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f,
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};
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const float JPEG_yuv_to_rgb[] = {
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1.000000f, 0.000000f, 1.402000f, 0.000000f, -0.703749f,
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1.000000f, -0.344136f, -0.714136f, 0.000000f, 0.531211f,
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1.000000f, 1.772000f, 0.000000f, 0.000000f, -0.889475f,
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0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f,
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const float Rec709_full_yuv_to_rgb[] = {
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1.000000f, -0.000000f, 1.574800f, 0.000000f, -0.790488f,
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1.000000f, -0.187324f, -0.468124f, 0.000000f, 0.329010f,
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1.000000f, 1.855600f, -0.000000f, 0.000000f, -0.931439f,
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0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f,
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};
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const float BT2020_rgb_to_yuv[] = {
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0.225613f, 0.582282f, 0.050928f, 0.000000f, 0.062745f,
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-0.122655f, -0.316560f, 0.439216f, 0.000000f, 0.501961f,
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0.439216f, -0.403890f, -0.035326f, 0.000000f, 0.501961f,
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0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f,
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const float Rec709_limited_rgb_to_yuv[] = {
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0.182586f, 0.614231f, 0.062007f, 0.000000f, 0.062745f,
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-0.100644f, -0.338572f, 0.439216f, 0.000000f, 0.501961f,
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0.439216f, -0.398942f, -0.040274f, 0.000000f, 0.501961f,
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0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f,
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};
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const float BT2020_yuv_to_rgb[] = {
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1.164384f, 0.000000f, 1.678674f, 0.000000f, -0.915688f,
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1.164384f, -0.187326f, -0.650424f, 0.000000f, 0.347458f,
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1.164384f, 2.141772f, 0.000000f, 0.000000f, -1.148145f,
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0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f,
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const float Rec709_limited_yuv_to_rgb[] = {
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1.164384f, -0.000000f, 1.792741f, 0.000000f, -0.972945f,
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1.164384f, -0.213249f, -0.532909f, 0.000000f, 0.301483f,
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1.164384f, 2.112402f, -0.000000f, 0.000000f, -1.133402f,
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0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f,
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};
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const float BT2020_8bit_full_rgb_to_yuv[] = {
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0.262700f, 0.678000f, 0.059300f, 0.000000f, 0.000000f,
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-0.139630f, -0.360370f, 0.500000f, 0.000000f, 0.501961f,
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0.500000f, -0.459786f, -0.040214f, 0.000000f, 0.501961f,
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0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f,
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};
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const float BT2020_8bit_full_yuv_to_rgb[] = {
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1.000000f, -0.000000f, 1.474600f, 0.000000f, -0.740191f,
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1.000000f, -0.164553f, -0.571353f, 0.000000f, 0.369396f,
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1.000000f, 1.881400f, -0.000000f, 0.000000f, -0.944389f,
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0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f,
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};
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const float BT2020_8bit_limited_rgb_to_yuv[] = {
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0.225613f, 0.582282f, 0.050928f, 0.000000f, 0.062745f,
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-0.122655f, -0.316560f, 0.439216f, 0.000000f, 0.501961f,
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0.439216f, -0.403890f, -0.035326f, 0.000000f, 0.501961f,
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0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f,
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};
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const float BT2020_8bit_limited_yuv_to_rgb[] = {
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1.164384f, -0.000000f, 1.678674f, 0.000000f, -0.915688f,
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1.164384f, -0.187326f, -0.650424f, 0.000000f, 0.347458f,
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1.164384f, 2.141772f, -0.000000f, 0.000000f, -1.148145f,
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0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f,
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};
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const float BT2020_10bit_full_rgb_to_yuv[] = {
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0.262700f, 0.678000f, 0.059300f, 0.000000f, 0.000000f,
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-0.139630f, -0.360370f, 0.500000f, 0.000000f, 0.500489f,
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0.500000f, -0.459786f, -0.040214f, 0.000000f, 0.500489f,
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0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f,
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};
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const float BT2020_10bit_full_yuv_to_rgb[] = {
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1.000000f, -0.000000f, 1.474600f, 0.000000f, -0.738021f,
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1.000000f, -0.164553f, -0.571353f, 0.000000f, 0.368313f,
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1.000000f, 1.881400f, -0.000000f, 0.000000f, -0.941620f,
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0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f,
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};
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const float BT2020_10bit_limited_rgb_to_yuv[] = {
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0.224951f, 0.580575f, 0.050779f, 0.000000f, 0.062561f,
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-0.122296f, -0.315632f, 0.437928f, 0.000000f, 0.500489f,
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0.437928f, -0.402706f, -0.035222f, 0.000000f, 0.500489f,
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0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f,
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};
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const float BT2020_10bit_limited_yuv_to_rgb[] = {
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1.167808f, -0.000000f, 1.683611f, 0.000000f, -0.915688f,
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1.167808f, -0.187877f, -0.652337f, 0.000000f, 0.347458f,
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1.167808f, 2.148072f, -0.000000f, 0.000000f, -1.148145f,
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0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f,
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};
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const float BT2020_12bit_full_rgb_to_yuv[] = {
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0.262700f, 0.678000f, 0.059300f, 0.000000f, 0.000000f,
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-0.139630f, -0.360370f, 0.500000f, 0.000000f, 0.500122f,
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0.500000f, -0.459786f, -0.040214f, 0.000000f, 0.500122f,
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0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f,
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};
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const float BT2020_12bit_full_yuv_to_rgb[] = {
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1.000000f, -0.000000f, 1.474600f, 0.000000f, -0.737480f,
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1.000000f, -0.164553f, -0.571353f, 0.000000f, 0.368043f,
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1.000000f, 1.881400f, -0.000000f, 0.000000f, -0.940930f,
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0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f,
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};
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const float BT2020_12bit_limited_rgb_to_yuv[] = {
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0.224787f, 0.580149f, 0.050742f, 0.000000f, 0.062515f,
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-0.122206f, -0.315401f, 0.437607f, 0.000000f, 0.500122f,
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0.437607f, -0.402411f, -0.035196f, 0.000000f, 0.500122f,
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0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f,
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};
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const float BT2020_12bit_limited_yuv_to_rgb[] = {
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1.168664f, -0.000000f, 1.684846f, 0.000000f, -0.915688f,
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1.168664f, -0.188015f, -0.652816f, 0.000000f, 0.347458f,
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1.168664f, 2.149647f, -0.000000f, 0.000000f, -1.148145f,
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0.000000f, 0.000000f, 0.000000f, 1.000000f, 0.000000f,
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};
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static_assert(kJPEG_SkYUVColorSpace == 0, "");
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static_assert(kRec601_SkYUVColorSpace == 1, "");
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static_assert(kRec709_SkYUVColorSpace == 2, "");
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static_assert(kBT2020_SkYUVColorSpace == 3, "");
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static_assert(kJPEG_Full_SkYUVColorSpace == 0, "");
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static_assert(kRec601_Limited_SkYUVColorSpace == 1, "");
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static_assert(kRec709_Full_SkYUVColorSpace == 2, "");
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static_assert(kRec709_Limited_SkYUVColorSpace == 3, "");
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static_assert(kBT2020_8bit_Full_SkYUVColorSpace == 4, "");
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static_assert(kBT2020_8bit_Limited_SkYUVColorSpace == 5, "");
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static_assert(kBT2020_10bit_Full_SkYUVColorSpace == 6, "");
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static_assert(kBT2020_10bit_Limited_SkYUVColorSpace == 7, "");
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static_assert(kBT2020_12bit_Full_SkYUVColorSpace == 8, "");
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static_assert(kBT2020_12bit_Limited_SkYUVColorSpace == 9, "");
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const float* yuv_to_rgb_array[] = {
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JPEG_yuv_to_rgb,
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Rec601_yuv_to_rgb,
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Rec709_yuv_to_rgb,
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BT2020_yuv_to_rgb,
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JPEG_full_yuv_to_rgb,
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Rec601_limited_yuv_to_rgb,
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Rec709_full_yuv_to_rgb,
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Rec709_limited_yuv_to_rgb,
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BT2020_8bit_full_yuv_to_rgb,
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BT2020_8bit_limited_yuv_to_rgb,
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BT2020_10bit_full_yuv_to_rgb,
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BT2020_10bit_limited_yuv_to_rgb,
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BT2020_12bit_full_yuv_to_rgb,
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BT2020_12bit_limited_yuv_to_rgb,
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};
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const float* rgb_to_yuv_array[] = {
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JPEG_rgb_to_yuv,
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Rec601_rgb_to_yuv,
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Rec709_rgb_to_yuv,
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BT2020_rgb_to_yuv,
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JPEG_full_rgb_to_yuv,
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Rec601_limited_rgb_to_yuv,
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Rec709_full_rgb_to_yuv,
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Rec709_limited_rgb_to_yuv,
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BT2020_8bit_full_rgb_to_yuv,
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BT2020_8bit_limited_rgb_to_yuv,
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BT2020_10bit_full_rgb_to_yuv,
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BT2020_10bit_limited_rgb_to_yuv,
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BT2020_12bit_full_rgb_to_yuv,
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BT2020_12bit_limited_rgb_to_yuv,
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};
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constexpr size_t kSizeOfColorMatrix = 20 * sizeof(float);
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@ -145,49 +234,73 @@ static void scale3(float m[], float s) {
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}
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namespace {
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enum Range { kFull, kLimited };
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struct YUVCoeff {
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float Kr, Kb;
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float scaleY, addY;
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float scaleUV;
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int bits;
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Range range;
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};
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} // namespace
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const YUVCoeff gCoeff[] = {
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// kJPEG_SkYUVColorSpace
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{ 0.299f, 0.114f, 1, 0, 1, },
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// kRec601_SkYUVColorSpace
|
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{ 0.299f, 0.114f, 219/255.f, 16/255.f, 224/255.f, },
|
||||
|
||||
// kRec709_SkYUVColorSpace
|
||||
{ 0.2126f, 0.0722f, 219/255.f, 16/255.f, 224/255.f, },
|
||||
|
||||
// kBT2020_SkYUVColorSpace
|
||||
{ 0.2627f, 0.0593f, 219/255.f, 16/255.f, 224/255.f, },
|
||||
{ 0.2990f, 0.1140f, 8, kFull }, // kJPEG_Full_SkYUVColorSpace
|
||||
{ 0.2990f, 0.1140f, 8, kLimited }, // kRec601_Limited_SkYUVColorSpace
|
||||
{ 0.2126f, 0.0722f, 8, kFull }, // kRec709_Full_SkYUVColorSpace
|
||||
{ 0.2126f, 0.0722f, 8, kLimited }, // kRec709_Limited_SkYUVColorSpace
|
||||
{ 0.2627f, 0.0593f, 8, kFull }, // kBT2020_8bit_Full_SkYUVColorSpace
|
||||
{ 0.2627f, 0.0593f, 8, kLimited }, // kBT2020_8bit_Limited_SkYUVColorSpace
|
||||
{ 0.2627f, 0.0593f, 10, kFull }, // kBT2020_10bit_Full_SkYUVColorSpace
|
||||
{ 0.2627f, 0.0593f, 10, kLimited }, // kBT2020_10bit_Limited_SkYUVColorSpace
|
||||
{ 0.2627f, 0.0593f, 12, kFull }, // kBT2020_12bit_Full_SkYUVColorSpace
|
||||
{ 0.2627f, 0.0593f, 12, kLimited }, // kBT2020_12bit_Limited_SkYUVColorSpace
|
||||
};
|
||||
}
|
||||
|
||||
static void make_rgb_to_yuv_matrix(float mx[20], const YUVCoeff& c) {
|
||||
SkASSERT(c.bits >= 8);
|
||||
const float Kr = c.Kr;
|
||||
const float Kb = c.Kb;
|
||||
const float Kg = 1.0f - Kr - Kb;
|
||||
const float Cr = 0.5f / (1.0f - Kb);
|
||||
const float Cb = 0.5f / (1.0f - Kr);
|
||||
|
||||
const int shift = c.bits - 8;
|
||||
|
||||
const float denom = static_cast<float>((1 << c.bits) - 1);
|
||||
float scaleY = 1.0f,
|
||||
addY = 0.0f,
|
||||
scaleUV = 1.0f,
|
||||
addUV = (128 << shift) / denom;
|
||||
|
||||
if (c.range == kLimited) {
|
||||
scaleY = (219 << shift) / denom;
|
||||
addY = ( 16 << shift) / denom;
|
||||
scaleUV = (224 << shift) / denom;
|
||||
}
|
||||
|
||||
float m[20] = {
|
||||
Kr, Kg, Kb, 0, c.addY,
|
||||
-Kr, -Kg, 1-Kb, 0, 128/255.f,
|
||||
1-Kr, -Kg, -Kb, 0, 128/255.f,
|
||||
0, 0, 0, 1, 0,
|
||||
Kr, Kg, Kb, 0, addY,
|
||||
-Kr, -Kg, 1-Kb, 0, addUV,
|
||||
1-Kr, -Kg, -Kb, 0, addUV,
|
||||
0, 0, 0, 1, 0,
|
||||
};
|
||||
memcpy(mx, m, sizeof(m));
|
||||
scale3(mx + 0, c.scaleY);
|
||||
scale3(mx + 5, Cr * c.scaleUV);
|
||||
scale3(mx + 10, Cb * c.scaleUV);
|
||||
scale3(mx + 0, scaleY );
|
||||
scale3(mx + 5, Cr * scaleUV);
|
||||
scale3(mx + 10, Cb * scaleUV);
|
||||
}
|
||||
|
||||
static void dump(const float m[20], SkYUVColorSpace cs, bool rgb2yuv) {
|
||||
const char* names[] = {
|
||||
"JPEG", "Rec601", "Rec709", "BT2020",
|
||||
"JPEG_full",
|
||||
"Rec601_limited",
|
||||
"Rec709_full",
|
||||
"Rec709_limited",
|
||||
"BT2020_8bit_full",
|
||||
"BT2020_8bit_limited",
|
||||
"BT2020_10bit_full",
|
||||
"BT2020_10bit_limited",
|
||||
"BT2020_12bit_full",
|
||||
"BT2020_12bit_limited",
|
||||
};
|
||||
const char* dirnames[] = {
|
||||
"yuv_to_rgb", "rgb_to_yuv",
|
||||
@ -206,8 +319,8 @@ static void dump(const float m[20], SkYUVColorSpace cs, bool rgb2yuv) {
|
||||
// Used to create the prebuilt tables for each colorspace.
|
||||
// Don't remove this function, in case we want to recompute those tables in the future.
|
||||
void SkColorMatrix_DumpYUVMatrixTables() {
|
||||
for (auto cs : {kRec709_SkYUVColorSpace, kRec601_SkYUVColorSpace, kJPEG_SkYUVColorSpace,
|
||||
kBT2020_SkYUVColorSpace}) {
|
||||
for (int i = 0; i < kLastEnum_SkYUVColorSpace; ++i) {
|
||||
SkYUVColorSpace cs = static_cast<SkYUVColorSpace>(i);
|
||||
float m[20];
|
||||
make_rgb_to_yuv_matrix(m, gCoeff[(unsigned)cs]);
|
||||
dump(m, cs, true);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user