nihav-core/src/scale/colorcvt.rs

   1 use super::*;
   2 use super::kernel::Kernel;
   3
   4 const YUV_PARAMS: &[[f32; 2]] = &[
   5     [ 0.333,    0.333   ], // RGB
   6     [ 0.2126,   0.0722  ], // ITU-R BT709
   7     [ 0.333,    0.333   ], // unspecified
   8     [ 0.333,    0.333   ], // reserved
   9     [ 0.299,    0.114   ], // ITU-R BT601
  10     [ 0.299,    0.114   ], // ITU-R BT470
  11     [ 0.299,    0.114   ], // SMPTE 170M
  12     [ 0.212,    0.087   ], // SMPTE 240M
  13     [ 0.333,    0.333   ], // YCoCg
  14     [ 0.2627,   0.0593  ], // ITU-R BT2020
  15     [ 0.2627,   0.0593  ], // ITU-R BT2020
  16 ];
  17
  18 const BT_PAL_COEFFS: [f32; 2] = [ 0.493, 0.877 ];
  19
  20 const SMPTE_NTSC_COEFFS: &[f32; 4] = &[ -0.268, 0.7358, 0.4127, 0.4778 ];
  21
  22 /*const RGB2YCOCG: [[f32; 3]; 3] = [
  23     [  0.25,  0.5,  0.25 ],
  24     [ -0.25,  0.5, -0.25 ],
  25     [  0.5,   0.0, -0.5  ]
  26 ];
  27 const YCOCG2RGB: [[f32; 3]; 3] = [
  28     [ 1.0, -1.0,  1.0 ],
  29     [ 1.0,  1.0,  0.0 ],
  30     [ 1.0, -1.0, -1.0 ]
  31 ];
  32
  33 const XYZ2RGB: [[f32; 3]; 3] = [
  34     [ 0.49,    0.31,   0.2     ],
  35     [ 0.17697, 0.8124, 0.01063 ],
  36     [ 0.0,     0.01,   0.99    ]
  37 ];
  38 const RGB2XYZ: [[f32; 3]; 3] = [
  39     [  2.364613, -0.89654, -0.46807 ],
  40     [ -0.515167,  1.42641,  0.08876 ],
  41     [  0.0052,   -0.01441,  1.00920 ]
  42 ];*/
  43
  44 fn make_rgb2yuv(kr: f32, kb: f32, mat: &mut [[f32; 3]; 3]) {
  45     // Y
  46     mat[0][0] = kr;
  47     mat[0][1] = 1.0 - kr - kb;
  48     mat[0][2] = kb;
  49     // Cb
  50     mat[1][0] = -mat[0][0] * 0.5 / (1.0 - kb);
  51     mat[1][1] = -mat[0][1] * 0.5 / (1.0 - kb);
  52     mat[1][2] = 0.5;
  53     // Cr
  54     mat[2][0] = 0.5;
  55     mat[2][1] = -mat[0][1] * 0.5 / (1.0 - kr);
  56     mat[2][2] = -mat[0][2] * 0.5 / (1.0 - kr);
  57 }
  58
  59 fn make_yuv2rgb(kr: f32, kb: f32, mat: &mut [[f32; 3]; 3]) {
  60     let kg = 1.0 - kr - kb;
  61
  62     // R
  63     mat[0][0] = 1.0;
  64     mat[0][1] = 0.0;
  65     mat[0][2] = 2.0 * (1.0 - kr);
  66     // G
  67     mat[1][0] = 1.0;
  68     mat[1][1] = -kb * 2.0 * (1.0 - kb) / kg;
  69     mat[1][2] = -kr * 2.0 * (1.0 - kr) / kg;
  70     // B
  71     mat[2][0] = 1.0;
  72     mat[2][1] = 2.0 * (1.0 - kb);
  73     mat[2][2] = 0.0;
  74 }
  75
  76 fn apply_pal_rgb2yuv(eu: f32, ev: f32, mat: &mut [[f32; 3]; 3]) {
  77     let ufac = 2.0 * (1.0 - mat[0][2]) * eu;
  78     let vfac = 2.0 * (1.0 - mat[0][0]) * ev;
  79
  80     // U
  81     mat[1][0] *= ufac;
  82     mat[1][1] *= ufac;
  83     mat[1][2]  = eu * (1.0 - mat[0][2]);
  84     // V
  85     mat[2][0]  = ev * (1.0 - mat[0][0]);
  86     mat[2][1] *= vfac;
  87     mat[2][2] *= vfac;
  88 }
  89
  90 fn apply_pal_yuv2rgb(eu: f32, ev: f32, mat: &mut [[f32; 3]; 3]) {
  91     let ufac = 1.0 / (mat[2][1] * eu);
  92     let vfac = 1.0 / (mat[0][2] * ev);
  93
  94     // R
  95     mat[0][2] *= vfac;
  96     // G
  97     mat[1][1] *= ufac;
  98     mat[1][2] *= vfac;
  99     // B
 100     mat[2][1] *= ufac;
 101 }
 102
 103 fn apply_ntsc_rgb2yiq(params: &[f32; 4], mat: &mut [[f32; 3]; 3]) {
 104     let ufac = 2.0 * (1.0 - mat[0][2]);
 105     let vfac = 2.0 * (1.0 - mat[0][0]);
 106     let mut tmp: [[f32; 3]; 2] = [[0.0; 3]; 2];
 107
 108     for i in 0..3 {
 109         tmp[0][i] = mat[1][i] * ufac;
 110         tmp[1][i] = mat[2][i] * vfac;
 111     }
 112     for i in 0..3 {
 113         mat[1][i] = params[0] * tmp[0][i] + params[1] * tmp[1][i];
 114         mat[2][i] = params[2] * tmp[0][i] + params[3] * tmp[1][i];
 115     }
 116 }
 117
 118 fn subm_det(mat: &[[f32; 3]; 3], col: usize, row: usize) -> f32 {
 119     let row0 = if row == 0 { 1 } else { 0 };
 120     let row1 = if (row == 1) || (row0 == 1) { 2 } else { 1 };
 121     let col0 = if col == 0 { 1 } else { 0 };
 122     let col1 = if (col == 1) || (col0 == 1) { 2 } else { 1 };
 123
 124     let det = mat[row0][col0] * mat[row1][col1] - mat[row0][col1] * mat[row1][col0];
 125     if ((col ^ row) & 1) == 0 {
 126         det
 127     } else {
 128         -det
 129     }
 130 }
 131
 132 fn invert_matrix(mat: &mut [[f32; 3]; 3]) {
 133     let d00 = subm_det(mat, 0, 0);
 134     let d01 = subm_det(mat, 0, 1);
 135     let d02 = subm_det(mat, 0, 2);
 136     let d10 = subm_det(mat, 1, 0);
 137     let d11 = subm_det(mat, 1, 1);
 138     let d12 = subm_det(mat, 1, 2);
 139     let d20 = subm_det(mat, 2, 0);
 140     let d21 = subm_det(mat, 2, 1);
 141     let d22 = subm_det(mat, 2, 2);
 142     let det = 1.0 / (mat[0][0] * d00 + mat[0][1] * d10 + mat[0][2] * d20).abs();
 143
 144     mat[0][0] = det * d00;
 145     mat[0][1] = det * d01;
 146     mat[0][2] = det * d02;
 147     mat[1][0] = det * d10;
 148     mat[1][1] = det * d11;
 149     mat[1][2] = det * d12;
 150     mat[2][0] = det * d20;
 151     mat[2][1] = det * d21;
 152     mat[2][2] = det * d22;
 153 }
 154
 155 fn matrix_mul(mat: &[[f32; 3]; 3], a: f32, b: f32, c: f32) -> (f32, f32, f32) {
 156     (a * mat[0][0] + b * mat[0][1] + c * mat[0][2],
 157      a * mat[1][0] + b * mat[1][1] + c * mat[1][2],
 158      a * mat[2][0] + b * mat[2][1] + c * mat[2][2] )
 159 }
 160
 161 #[derive(Default)]
 162 struct RgbToYuv {
 163     matrix: [[f32; 3]; 3],
 164 }
 165
 166 impl RgbToYuv {
 167     fn new() -> Self { Self::default() }
 168 }
 169
 170 impl Kernel for RgbToYuv {
 171     fn init(&mut self, in_fmt: &ScaleInfo, dest_fmt: &ScaleInfo) -> ScaleResult<NABufferType> {
 172         let mut df = dest_fmt.fmt;
 173 //todo coeff selection
 174         make_rgb2yuv(YUV_PARAMS[2][0], YUV_PARAMS[2][1], &mut self.matrix);
 175         if let ColorModel::YUV(yuvsm) = df.get_model() {
 176             match yuvsm {
 177             YUVSubmodel::YCbCr  => {},
 178             YUVSubmodel::YIQ    => { apply_ntsc_rgb2yiq(SMPTE_NTSC_COEFFS, &mut self.matrix); },
 179             YUVSubmodel::YUVJ   => { apply_pal_rgb2yuv(BT_PAL_COEFFS[0], BT_PAL_COEFFS[1], &mut self.matrix); },
 180             };
 181         } else {
 182             return Err(ScaleError::InvalidArgument);
 183         }
 184         for i in 0..MAX_CHROMATONS {
 185             if let Some(ref mut chr) = df.comp_info[i] {
 186                 chr.packed = false;
 187                 chr.comp_offs = i as u8;
 188                 chr.h_ss = 0;
 189                 chr.v_ss = 0;
 190             }
 191         }
 192 println!(" [intermediate format {}]", df);
 193         let res = alloc_video_buffer(NAVideoInfo::new(in_fmt.width, in_fmt.height, false, df), 3);
 194         if res.is_err() { return Err(ScaleError::AllocError); }
 195         Ok(res.unwrap())
 196     }
 197     fn process(&mut self, pic_in: &NABufferType, pic_out: &mut NABufferType) {
 198         if let (Some(ref sbuf), Some(ref mut dbuf)) = (pic_in.get_vbuf(), pic_out.get_vbuf()) {
 199             let istrides = [sbuf.get_stride(0), sbuf.get_stride(1), sbuf.get_stride(2)];
 200             let dstrides = [dbuf.get_stride(0), dbuf.get_stride(1), dbuf.get_stride(2)];
 201             let (w, h) = sbuf.get_dimensions(0);
 202
 203             let mut roff = sbuf.get_offset(0);
 204             let mut goff = sbuf.get_offset(1);
 205             let mut boff = sbuf.get_offset(2);
 206             let mut yoff = dbuf.get_offset(0);
 207             let mut uoff = dbuf.get_offset(1);
 208             let mut voff = dbuf.get_offset(2);
 209             let src = sbuf.get_data();
 210             let dst = dbuf.get_data_mut().unwrap();
 211             for _y in 0..h {
 212                 for x in 0..w {
 213                     let r = src[roff + x] as f32;
 214                     let g = src[goff + x] as f32;
 215                     let b = src[boff + x] as f32;
 216                     let (y, u, v) = matrix_mul(&self.matrix, r, g, b);
 217
 218                     dst[yoff + x] = (y as i16).max(0).min(255) as u8;
 219                     dst[uoff + x] = ((u as i16).max(-128).min(128) + 128) as u8;
 220                     dst[voff + x] = ((v as i16).max(-128).min(128) + 128) as u8;
 221                 }
 222                 roff += istrides[0];
 223                 goff += istrides[1];
 224                 boff += istrides[2];
 225                 yoff += dstrides[0];
 226                 uoff += dstrides[1];
 227                 voff += dstrides[2];
 228             }
 229         }
 230     }
 231 }
 232
 233 pub fn create_rgb2yuv() -> Box<Kernel> {
 234     Box::new(RgbToYuv::new())
 235 }
 236
 237 #[derive(Default)]
 238 struct YuvToRgb {
 239     matrix: [[f32; 3]; 3],
 240 }
 241
 242 impl YuvToRgb {
 243     fn new() -> Self { Self::default() }
 244 }
 245
 246 impl Kernel for YuvToRgb {
 247     fn init(&mut self, in_fmt: &ScaleInfo, dest_fmt: &ScaleInfo) -> ScaleResult<NABufferType> {
 248         let mut df = dest_fmt.fmt;
 249 //todo coeff selection
 250         make_yuv2rgb(YUV_PARAMS[2][0], YUV_PARAMS[2][1], &mut self.matrix);
 251         if let ColorModel::YUV(yuvsm) = in_fmt.fmt.get_model() {
 252             match yuvsm {
 253                 YUVSubmodel::YCbCr  => {},
 254                 YUVSubmodel::YIQ    => {
 255                     make_rgb2yuv(YUV_PARAMS[2][0], YUV_PARAMS[2][1], &mut self.matrix);
 256                     apply_ntsc_rgb2yiq(SMPTE_NTSC_COEFFS, &mut self.matrix);
 257                     invert_matrix(&mut self.matrix);
 258                 },
 259                 YUVSubmodel::YUVJ   => {
 260                     apply_pal_yuv2rgb(BT_PAL_COEFFS[0], BT_PAL_COEFFS[1], &mut self.matrix);
 261                 },
 262             };
 263         } else {
 264             return Err(ScaleError::InvalidArgument);
 265         }
 266         for i in 0..MAX_CHROMATONS {
 267             if let Some(ref mut chr) = df.comp_info[i] {
 268                 chr.packed = false;
 269                 chr.comp_offs = i as u8;
 270             }
 271         }
 272 println!(" [intermediate format {}]", df);
 273         let res = alloc_video_buffer(NAVideoInfo::new(in_fmt.width, in_fmt.height, false, df), 3);
 274         if res.is_err() { return Err(ScaleError::AllocError); }
 275         Ok(res.unwrap())
 276     }
 277     fn process(&mut self, pic_in: &NABufferType, pic_out: &mut NABufferType) {
 278         if let (Some(ref sbuf), Some(ref mut dbuf)) = (pic_in.get_vbuf(), pic_out.get_vbuf()) {
 279             let istrides = [sbuf.get_stride(0), sbuf.get_stride(1), sbuf.get_stride(2)];
 280             let dstrides = [dbuf.get_stride(0), dbuf.get_stride(1), dbuf.get_stride(2)];
 281             let (w, h) = sbuf.get_dimensions(0);
 282             let (sv0, sh0) = sbuf.get_info().get_format().get_chromaton(1).unwrap().get_subsampling();
 283             let (sv1, sh1) = sbuf.get_info().get_format().get_chromaton(2).unwrap().get_subsampling();
 284
 285             let uhmask = (1 << sh0) - 1;
 286             let vhmask = (1 << sh1) - 1;
 287             let mut roff = dbuf.get_offset(0);
 288             let mut goff = dbuf.get_offset(1);
 289             let mut boff = dbuf.get_offset(2);
 290             let mut yoff = sbuf.get_offset(0);
 291             let mut uoff = sbuf.get_offset(1);
 292             let mut voff = sbuf.get_offset(2);
 293             let src = sbuf.get_data();
 294             let dst = dbuf.get_data_mut().unwrap();
 295             for y in 0..h {
 296                 for x in 0..w {
 297                     let y = src[yoff + x] as f32;
 298                     let u = ((src[uoff + (x >> sv0)] as i16) - 128) as f32;
 299                     let v = ((src[voff + (x >> sv1)] as i16) - 128) as f32;
 300
 301                     let (r, g, b) = matrix_mul(&self.matrix, y, u, v);
 302                     dst[roff + x] = (r as i16).max(0).min(255) as u8;
 303                     dst[goff + x] = (g as i16).max(0).min(255) as u8;
 304                     dst[boff + x] = (b as i16).max(0).min(255) as u8;
 305                 }
 306                 roff += dstrides[0];
 307                 goff += dstrides[1];
 308                 boff += dstrides[2];
 309                 yoff += istrides[0];
 310                 if (y & uhmask) == uhmask {
 311                     uoff += istrides[1];
 312                 }
 313                 if (y & vhmask) == vhmask {
 314                     voff += istrides[2];
 315                 }
 316             }
 317         }
 318     }
 319 }
 320
 321 pub fn create_yuv2rgb() -> Box<Kernel> {
 322     Box::new(YuvToRgb::new())
 323 }