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 #[allow(clippy::many_single_char_names)]
 171 impl Kernel for RgbToYuv {
 172     fn init(&mut self, in_fmt: &ScaleInfo, dest_fmt: &ScaleInfo) -> ScaleResult<NABufferType> {
 173         let mut df = dest_fmt.fmt;
 174 //todo coeff selection
 175         make_rgb2yuv(YUV_PARAMS[2][0], YUV_PARAMS[2][1], &mut self.matrix);
 176         if let ColorModel::YUV(yuvsm) = df.get_model() {
 177             match yuvsm {
 178             YUVSubmodel::YCbCr  => {},
 179             YUVSubmodel::YIQ    => { apply_ntsc_rgb2yiq(SMPTE_NTSC_COEFFS, &mut self.matrix); },
 180             YUVSubmodel::YUVJ   => { apply_pal_rgb2yuv(BT_PAL_COEFFS[0], BT_PAL_COEFFS[1], &mut self.matrix); },
 181             };
 182         } else {
 183             return Err(ScaleError::InvalidArgument);
 184         }
 185         for i in 0..MAX_CHROMATONS {
 186             if let Some(ref mut chr) = df.comp_info[i] {
 187                 chr.packed = false;
 188                 chr.comp_offs = i as u8;
 189                 chr.h_ss = 0;
 190                 chr.v_ss = 0;
 191             }
 192         }
 193 println!(" [intermediate format {}]", df);
 194         let res = alloc_video_buffer(NAVideoInfo::new(in_fmt.width, in_fmt.height, false, df), 3);
 195         if res.is_err() { return Err(ScaleError::AllocError); }
 196         Ok(res.unwrap())
 197     }
 198     fn process(&mut self, pic_in: &NABufferType, pic_out: &mut NABufferType) {
 199         if let (Some(ref sbuf), Some(ref mut dbuf)) = (pic_in.get_vbuf(), pic_out.get_vbuf()) {
 200             let istrides = [sbuf.get_stride(0), sbuf.get_stride(1), sbuf.get_stride(2)];
 201             let dstrides = [dbuf.get_stride(0), dbuf.get_stride(1), dbuf.get_stride(2)];
 202             let (w, h) = sbuf.get_dimensions(0);
 203
 204             let mut roff = sbuf.get_offset(0);
 205             let mut goff = sbuf.get_offset(1);
 206             let mut boff = sbuf.get_offset(2);
 207             let mut yoff = dbuf.get_offset(0);
 208             let mut uoff = dbuf.get_offset(1);
 209             let mut voff = dbuf.get_offset(2);
 210             let src = sbuf.get_data();
 211             let dst = dbuf.get_data_mut().unwrap();
 212             for _y in 0..h {
 213                 for x in 0..w {
 214                     let r = f32::from(src[roff + x]);
 215                     let g = f32::from(src[goff + x]);
 216                     let b = f32::from(src[boff + x]);
 217                     let (y, u, v) = matrix_mul(&self.matrix, r, g, b);
 218
 219                     dst[yoff + x] = (y as i16).max(0).min(255) as u8;
 220                     dst[uoff + x] = ((u as i16).max(-128).min(128) + 128) as u8;
 221                     dst[voff + x] = ((v as i16).max(-128).min(128) + 128) as u8;
 222                 }
 223                 roff += istrides[0];
 224                 goff += istrides[1];
 225                 boff += istrides[2];
 226                 yoff += dstrides[0];
 227                 uoff += dstrides[1];
 228                 voff += dstrides[2];
 229             }
 230         }
 231     }
 232 }
 233
 234 pub fn create_rgb2yuv() -> Box<dyn Kernel> {
 235     Box::new(RgbToYuv::new())
 236 }
 237
 238 #[derive(Default)]
 239 struct YuvToRgb {
 240     matrix: [[f32; 3]; 3],
 241     yscale: Vec<i16>,
 242     r_chr:  Vec<i16>,
 243     g_u:    Vec<i16>,
 244     g_v:    Vec<i16>,
 245     b_chr:  Vec<i16>,
 246 }
 247
 248 impl YuvToRgb {
 249     fn new() -> Self { Self::default() }
 250 }
 251
 252 #[allow(clippy::many_single_char_names)]
 253 impl Kernel for YuvToRgb {
 254     fn init(&mut self, in_fmt: &ScaleInfo, dest_fmt: &ScaleInfo) -> ScaleResult<NABufferType> {
 255         let mut df = dest_fmt.fmt;
 256         df.palette = false;
 257 //todo coeff selection
 258         make_yuv2rgb(YUV_PARAMS[2][0], YUV_PARAMS[2][1], &mut self.matrix);
 259         if let ColorModel::YUV(yuvsm) = in_fmt.fmt.get_model() {
 260             match yuvsm {
 261                 YUVSubmodel::YCbCr  => {},
 262                 YUVSubmodel::YIQ    => {
 263                     make_rgb2yuv(YUV_PARAMS[2][0], YUV_PARAMS[2][1], &mut self.matrix);
 264                     apply_ntsc_rgb2yiq(SMPTE_NTSC_COEFFS, &mut self.matrix);
 265                     invert_matrix(&mut self.matrix);
 266                 },
 267                 YUVSubmodel::YUVJ   => {
 268                     apply_pal_yuv2rgb(BT_PAL_COEFFS[0], BT_PAL_COEFFS[1], &mut self.matrix);
 269                 },
 270             };
 271             if yuvsm != YUVSubmodel::YIQ {
 272                 self.yscale = Vec::with_capacity(256);
 273                 self.r_chr  = Vec::with_capacity(256);
 274                 self.g_u    = Vec::with_capacity(256);
 275                 self.g_v    = Vec::with_capacity(256);
 276                 self.b_chr  = Vec::with_capacity(256);
 277                 for i in 0..256 {
 278                     let yval = i as i16; // todo limited range as well
 279                     self.yscale.push(yval);
 280                     let rval = (((i as f32) - 128.0) * self.matrix[0][2]) as i16;
 281                     self.r_chr.push(rval);
 282                     let uval = (((i as f32) - 128.0) * self.matrix[1][1]) as i16;
 283                     self.g_u.push(uval);
 284                     let vval = (((i as f32) - 128.0) * self.matrix[1][2]) as i16;
 285                     self.g_v.push(vval);
 286                     let bval = (((i as f32) - 128.0) * self.matrix[2][1]) as i16;
 287                     self.b_chr.push(bval);
 288                 }
 289             }
 290         } else {
 291             return Err(ScaleError::InvalidArgument);
 292         }
 293         for i in 0..MAX_CHROMATONS {
 294             if let Some(ref mut chr) = df.comp_info[i] {
 295                 chr.packed = false;
 296                 chr.comp_offs = i as u8;
 297             }
 298         }
 299 println!(" [intermediate format {}]", df);
 300         let res = alloc_video_buffer(NAVideoInfo::new(in_fmt.width, in_fmt.height, false, df), 3);
 301         if res.is_err() { return Err(ScaleError::AllocError); }
 302         Ok(res.unwrap())
 303     }
 304     fn process(&mut self, pic_in: &NABufferType, pic_out: &mut NABufferType) {
 305         if let (Some(ref sbuf), Some(ref mut dbuf)) = (pic_in.get_vbuf(), pic_out.get_vbuf()) {
 306             let istrides = [sbuf.get_stride(0), sbuf.get_stride(1), sbuf.get_stride(2)];
 307             let dstrides = [dbuf.get_stride(0), dbuf.get_stride(1), dbuf.get_stride(2)];
 308             let (w, h) = sbuf.get_dimensions(0);
 309             let (sv0, sh0) = sbuf.get_info().get_format().get_chromaton(1).unwrap().get_subsampling();
 310             let (sv1, sh1) = sbuf.get_info().get_format().get_chromaton(2).unwrap().get_subsampling();
 311
 312             let uhmask = (1 << sh0) - 1;
 313             let vhmask = (1 << sh1) - 1;
 314             let mut roff = dbuf.get_offset(0);
 315             let mut goff = dbuf.get_offset(1);
 316             let mut boff = dbuf.get_offset(2);
 317             let mut yoff = sbuf.get_offset(0);
 318             let mut uoff = sbuf.get_offset(1);
 319             let mut voff = sbuf.get_offset(2);
 320             let src = sbuf.get_data();
 321             let dst = dbuf.get_data_mut().unwrap();
 322             if self.yscale.len() > 0 {
 323                 for y in 0..h {
 324                     for x in 0..w {
 325                         let y = self.yscale[src[yoff + x] as usize];
 326                         let u = src[uoff + (x >> sv0)] as usize;
 327                         let v = src[voff + (x >> sv1)] as usize;
 328                         let r = y + self.r_chr[v];
 329                         let g = y + self.g_u[u] + self.g_v[v];
 330                         let b = y + self.b_chr[u];
 331                         dst[roff + x] = r.max(0).min(255) as u8;
 332                         dst[goff + x] = g.max(0).min(255) as u8;
 333                         dst[boff + x] = b.max(0).min(255) as u8;
 334                     }
 335                     roff += dstrides[0];
 336                     goff += dstrides[1];
 337                     boff += dstrides[2];
 338                     yoff += istrides[0];
 339                     if (y & uhmask) == uhmask {
 340                         uoff += istrides[1];
 341                     }
 342                     if (y & vhmask) == vhmask {
 343                         voff += istrides[2];
 344                     }
 345                 }
 346                 return;
 347             }
 348             for y in 0..h {
 349                 for x in 0..w {
 350                     let y = f32::from(src[yoff + x]);
 351                     let u = f32::from(i16::from(src[uoff + (x >> sv0)]) - 128);
 352                     let v = f32::from(i16::from(src[voff + (x >> sv1)]) - 128);
 353
 354                     let (r, g, b) = matrix_mul(&self.matrix, y, u, v);
 355                     dst[roff + x] = (r as i16).max(0).min(255) as u8;
 356                     dst[goff + x] = (g as i16).max(0).min(255) as u8;
 357                     dst[boff + x] = (b as i16).max(0).min(255) as u8;
 358                 }
 359                 roff += dstrides[0];
 360                 goff += dstrides[1];
 361                 boff += dstrides[2];
 362                 yoff += istrides[0];
 363                 if (y & uhmask) == uhmask {
 364                     uoff += istrides[1];
 365                 }
 366                 if (y & vhmask) == vhmask {
 367                     voff += istrides[2];
 368                 }
 369             }
 370         }
 371     }
 372 }
 373
 374 pub fn create_yuv2rgb() -> Box<dyn Kernel> {
 375     Box::new(YuvToRgb::new())
 376 }