git.sesse.net Git - ffmpeg/blob - libswscale/arm/yuv2rgb_neon.S

   1 /*
   2  * Copyright (c) 2015 Matthieu Bouron <matthieu.bouron stupeflix.com>
   3  * Copyright (c) 2015 Clément Bœsch <clement stupeflix.com>
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include "libavutil/arm/asm.S"
  23
  24
  25 .macro compute_premult_16 half_u1, half_u2, half_v1, half_v2
  26     vmov                d2, \half_u1                                   @ copy left q14 to left q1
  27     vmov                d3, \half_u1                                   @ copy left q14 to right q1
  28     vmov                d4, \half_u2                                   @ copy right q14 to left q2
  29     vmov                d5, \half_u2                                   @ copy right q14 to right q2
  30
  31     vmov                d6, \half_v1                                   @ copy left q15 to left q3
  32     vmov                d7, \half_v1                                   @ copy left q15 to right q3
  33     vmov                d8, \half_v2                                   @ copy right q15 to left q4
  34     vmov                d9, \half_v2                                   @ copy right q15 to right q4
  35
  36     vzip.16             d2, d3                                         @ U1U1U2U2U3U3U4U4
  37     vzip.16             d4, d5                                         @ U5U5U6U6U7U7U8U8
  38
  39     vzip.16             d6, d7                                         @ V1V1V2V2V3V3V4V4
  40     vzip.16             d8, d9                                         @ V5V5V6V6V7V7V8V8
  41
  42     vmul.s16            q8,  q3, d1[0]                                 @  V * v2r             (left,  red)
  43     vmul.s16            q9,  q4, d1[0]                                 @  V * v2r             (right, red)
  44     vmul.s16            q10, q1, d1[1]                                 @  U * u2g
  45     vmul.s16            q11, q2, d1[1]                                 @  U * u2g
  46     vmla.s16            q10, q3, d1[2]                                 @  U * u2g + V * v2g   (left,  green)
  47     vmla.s16            q11, q4, d1[2]                                 @  U * u2g + V * v2g   (right, green)
  48     vmul.s16            q12, q1, d1[3]                                 @  U * u2b             (left,  blue)
  49     vmul.s16            q13, q2, d1[3]                                 @  U * u2b             (right, blue)
  50 .endm
  51
  52 .macro compute_premult_32 half_u half_v
  53     vmov                d2, \half_u                                    @ copy left q14 to left q1
  54     vmov                d3, \half_u                                    @ copy left q14 to right q1
  55     vmov                d4, \half_v                                    @ copy left q15 to left q2
  56     vmov                d5, \half_v                                    @ copy left q15 to right q2
  57
  58     vzip.16             d2, d3                                         @ U1U1U2U2U3U3U4U4
  59     vzip.16             d4, d5                                         @ V1V1V2V2V3V3V4V4
  60
  61     vmull.s16           q8,  d4, d1[0]                                 @  V * v2r             (left,  red)
  62     vmull.s16           q9,  d5, d1[0]                                 @  V * v2r             (right, red)
  63     vmull.s16           q10, d2, d1[1]                                 @  U * u2g
  64     vmull.s16           q11, d3, d1[1]                                 @  U * u2g
  65     vmlal.s16           q10, d4, d1[2]                                 @  U * u2g + V * v2g   (left,  green)
  66     vmlal.s16           q11, d5, d1[2]                                 @  U * u2g + V * v2g   (right, green)
  67     vmull.s16           q12, d2, d1[3]                                 @  U * u2b             (left,  blue)
  68     vmull.s16           q13, d3, d1[3]                                 @  U * u2b             (right, blue)
  69 .endm
  70
  71 .macro compute_color_16 dst_comp1 dst_comp2 pre1 pre2
  72     vadd.s16            q1, q14, \pre1
  73     vadd.s16            q2, q15, \pre2
  74     vqrshrun.s16        \dst_comp1, q1, #6
  75     vqrshrun.s16        \dst_comp2, q2, #6
  76 .endm
  77
  78 .macro compute_color_32 dst_comp pre1 pre2
  79     vadd.s32            q3, q1, \pre1
  80     vadd.s32            q4, q2, \pre2
  81     vqrshrun.s32        d10, q3, #13
  82     vqrshrun.s32        d11, q4, #13                                   @ q5 = ({q3,q4} + (1<<12)) >> 13
  83     vqmovn.u16          \dst_comp, q5                                  @ saturate 16bit -> 8bit
  84 .endm
  85
  86 .macro compute_rgba_16 r1 r2 g1 g2 b1 b2 a1 a2
  87     compute_color_16    \r1, \r2, q8,  q9
  88     compute_color_16    \g1, \g2, q10, q11
  89     compute_color_16    \b1, \b2, q12, q13
  90     vmov.u8             \a1, #255
  91     vmov.u8             \a2, #255
  92 .endm
  93
  94 .macro compute_rgba_32 r g b a
  95     compute_color_32    \r, q8,  q9
  96     compute_color_32    \g, q10, q11
  97     compute_color_32    \b, q12, q13
  98     vmov.u8             \a, #255
  99 .endm
 100
 101 .macro compute_16px_16 dst y0 y1 ofmt
 102     vmovl.u8            q14, \y0                                       @ 8px of y
 103     vmovl.u8            q15, \y1                                       @ 8px of y
 104
 105     vdup.16             q5, r9                                         @ q5  = y_offset
 106     vmov                d14, d0                                        @ q7  = y_coeff
 107     vmov                d15, d0                                        @ q7  = y_coeff
 108
 109     vsub.s16            q14, q5
 110     vsub.s16            q15, q5
 111
 112     vmul.s16            q14, q7                                        @ q14 = (srcY - y_offset) * y_coeff (left)
 113     vmul.s16            q15, q7                                        @ q15 = (srcY - y_offset) * y_coeff (right)
 114
 115
 116 .ifc \ofmt,argb
 117     compute_rgba_16     d7, d11, d8, d12, d9, d13, d6, d10
 118 .endif
 119
 120 .ifc \ofmt,rgba
 121     compute_rgba_16     d6, d10, d7, d11, d8, d12, d9, d13
 122 .endif
 123
 124 .ifc \ofmt,abgr
 125     compute_rgba_16     d9, d13, d8, d12, d7, d11, d6, d10
 126 .endif
 127
 128 .ifc \ofmt,bgra
 129     compute_rgba_16     d8, d12, d7, d11, d6, d10, d9, d13
 130 .endif
 131     vst4.8              {q3, q4}, [\dst,:128]!
 132     vst4.8              {q5, q6}, [\dst,:128]!
 133
 134 .endm
 135
 136 .macro compute_8px_32 dst half_y ofmt
 137     vmovl.u8            q7, \half_y                                    @ 8px of Y
 138     vdup.16             q5, r9
 139     vsub.s16            q7, q5
 140     vmull.s16           q1, d14, d0                                    @ q1 = (srcY - y_offset) * y_coeff (left)
 141     vmull.s16           q2, d15, d0                                    @ q2 = (srcY - y_offset) * y_coeff (right)
 142
 143 .ifc \ofmt,argb
 144     compute_rgba_32     d13, d14, d15, d12
 145 .endif
 146
 147 .ifc \ofmt,rgba
 148     compute_rgba_32     d12, d13, d14, d15
 149 .endif
 150
 151 .ifc \ofmt,abgr
 152     compute_rgba_32     d15, d14, d13, d12
 153 .endif
 154
 155 .ifc \ofmt,bgra
 156     compute_rgba_32     d14, d13, d12, d15
 157 .endif
 158
 159     vst4.8              {q6, q7}, [\dst,:128]!
 160 .endm
 161
 162 .macro process_16px_16 ofmt
 163     compute_premult_16  d28, d29, d30, d31
 164
 165     vld1.8              {q7}, [r4]!                                    @ first line of luma
 166     compute_16px_16     r2, d14, d15, \ofmt
 167
 168     vld1.8              {q7}, [r12]!                                   @ second line of luma
 169     compute_16px_16     r11, d14, d15, \ofmt
 170 .endm
 171
 172 .macro process_16px_32 ofmt
 173     compute_premult_32  d28, d30
 174
 175     vld1.8              {q7}, [r4]!                                    @ first line of luma
 176     vmov                d28, d15                                       @ save right of the first line of luma for later use
 177     compute_8px_32      r2, d14, \ofmt
 178
 179     vld1.8              {q7}, [r12]!                                   @ second line of luma
 180     vmov                d30, d15                                       @ save right of the second line of luma for later use
 181     compute_8px_32      r11, d14, \ofmt
 182
 183     compute_premult_32  d29, d31
 184     compute_8px_32      r2,  d28, \ofmt
 185     compute_8px_32      r11, d30, \ofmt
 186 .endm
 187
 188 .macro load_args_nvx
 189     push                {r4-r12, lr}
 190     vpush               {q4-q7}
 191     ldr                 r4, [sp, #104]                                 @ r4  = srcY
 192     ldr                 r5, [sp, #108]                                 @ r5  = linesizeY
 193     ldr                 r6, [sp, #112]                                 @ r6  = srcC
 194     ldr                 r7, [sp, #116]                                 @ r7  = linesizeC
 195     ldr                 r8, [sp, #120]                                 @ r8  = table
 196     ldr                 r9, [sp, #124]                                 @ r9  = y_offset
 197     ldr                 r10,[sp, #128]                                 @ r10 = y_coeff
 198     vdup.16             d0, r10                                        @ d0  = y_coeff
 199     vld1.16             {d1}, [r8]                                     @ d1  = *table
 200     add                 r11, r2, r3                                    @ r11 = dst + linesize (dst2)
 201     add                 r12, r4, r5                                    @ r12 = srcY + linesizeY (srcY2)
 202     lsl                 r3, r3, #1
 203     lsl                 r5, r5, #1
 204     lsl                 r8, r0, #2
 205     sub                 r3, r3, r8                                     @ r3 = linesize  * 2 - width * 4 (padding)
 206     sub                 r5, r5, r0                                     @ r5 = linesizeY * 2 - width     (paddingY)
 207     sub                 r7, r7, r0                                     @ r7 = linesizeC     - width     (paddingC)
 208 .endm
 209
 210 .macro load_args_yuv420p
 211     push                {r4-r12, lr}
 212     vpush               {q4-q7}
 213     ldr                 r4, [sp, #104]                                 @ r4  = srcY
 214     ldr                 r5, [sp, #108]                                 @ r5  = linesizeY
 215     ldr                 r6, [sp, #112]                                 @ r6  = srcU
 216     ldr                 r8, [sp, #128]                                 @ r8  = table
 217     ldr                 r9, [sp, #132]                                 @ r9  = y_offset
 218     ldr                 r10,[sp, #136]                                 @ r10 = y_coeff
 219     vdup.16             d0, r10                                        @ d0  = y_coeff
 220     vld1.16             {d1}, [r8]                                     @ d1  = *table
 221     add                 r11, r2, r3                                    @ r11 = dst + linesize (dst2)
 222     add                 r12, r4, r5                                    @ r12 = srcY + linesizeY (srcY2)
 223     lsl                 r3, r3, #1
 224     lsl                 r5, r5, #1
 225     lsl                 r8, r0, #2
 226     sub                 r3, r3, r8                                     @ r3 = linesize  * 2 - width * 4 (padding)
 227     sub                 r5, r5, r0                                     @ r5 = linesizeY * 2 - width     (paddingY)
 228     ldr                 r10,[sp, #120]                                 @ r10 = srcV
 229 .endm
 230
 231 .macro declare_func ifmt ofmt precision
 232 function ff_\ifmt\()_to_\ofmt\()_neon_\precision\(), export=1
 233
 234 .ifc \ifmt,nv12
 235     load_args_nvx
 236 .endif
 237
 238 .ifc \ifmt,nv21
 239     load_args_nvx
 240 .endif
 241
 242 .ifc \ifmt,yuv420p
 243     load_args_yuv420p
 244 .endif
 245
 246 1:
 247     mov                 r8, r0                                         @ r8 = width
 248 2:
 249     pld [r6, #64*3]
 250     pld [r4, #64*3]
 251     pld [r12, #64*3]
 252
 253     vmov.i8             d10, #128
 254
 255 .ifc \ifmt,nv12
 256     vld2.8              {d2, d3}, [r6]!                                @ q1: interleaved chroma line
 257     vsubl.u8            q14, d2, d10                                   @ q14 = U - 128
 258     vsubl.u8            q15, d3, d10                                   @ q15 = V - 128
 259 .endif
 260
 261 .ifc \ifmt,nv21
 262     vld2.8              {d2, d3}, [r6]!                                @ q1: interleaved chroma line
 263     vsubl.u8            q14, d3, d10                                   @ q14 = U - 128
 264     vsubl.u8            q15, d2, d10                                   @ q15 = V - 128
 265 .endif
 266
 267 .ifc \ifmt,yuv420p
 268     pld [r10, #64*3]
 269
 270     vld1.8              d2, [r6]!                                      @ d2: chroma red line
 271     vld1.8              d3, [r10]!                                     @ d3: chroma blue line
 272     vsubl.u8            q14, d2, d10                                   @ q14 = U - 128
 273     vsubl.u8            q15, d3, d10                                   @ q15 = V - 128
 274 .endif
 275
 276
 277     process_16px_\precision \ofmt
 278
 279     subs                r8, r8, #16                                    @ width -= 16
 280     bgt                 2b
 281
 282     add                 r2, r2, r3                                     @ dst   += padding
 283     add                 r4, r4, r5                                     @ srcY  += paddingY
 284     add                 r11, r11, r3                                   @ dst2  += padding
 285     add                 r12, r12, r5                                   @ srcY2 += paddingY
 286
 287 .ifc \ifmt,nv12
 288     add                 r6, r6, r7                                     @ srcC  += paddingC
 289 .endif
 290
 291 .ifc \ifmt,nv21
 292     add                 r6, r6, r7                                     @ srcC  += paddingC
 293 .endif
 294
 295 .ifc \ifmt,yuv420p
 296     ldr                 r7, [sp, #116]                                 @ r7     = linesizeU
 297     sub                 r7, r7, r0, lsr #1                             @ r7     = linesizeU - width / 2 (paddingU)
 298     add                 r6, r6, r7                                     @ srcU  += paddingU
 299
 300     ldr                 r7, [sp, #124]                                 @ r7     = linesizeV
 301     sub                 r7, r7, r0, lsr #1                             @ r7     = linesizeV - width / 2 (paddingV)
 302     add                 r10, r10, r7                                   @ srcU  += paddingV
 303 .endif
 304
 305     subs                r1, r1, #2                                     @ height -= 2
 306     bgt                 1b
 307
 308     vpop                {q4-q7}
 309     pop                 {r4-r12, lr}
 310     mov                 pc, lr
 311 endfunc
 312 .endm
 313
 314 .macro declare_rgb_funcs ifmt precision
 315     declare_func \ifmt, argb, \precision
 316     declare_func \ifmt, rgba, \precision
 317     declare_func \ifmt, abgr, \precision
 318     declare_func \ifmt, bgra, \precision
 319 .endm
 320
 321 declare_rgb_funcs nv12, 16
 322 declare_rgb_funcs nv21, 16
 323 declare_rgb_funcs nv12, 32
 324 declare_rgb_funcs nv21, 32
 325 declare_rgb_funcs yuv420p, 16
 326 declare_rgb_funcs yuv420p, 32