| /* |
| * Copyright (C) 2007 Marc Hoffman <marc.hoffman@analog.com> |
| * April 20, 2007 |
| * |
| * Blackfin video color space converter operations |
| * convert I420 YV12 to RGB in various formats |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| |
| /* |
| YUV420 to RGB565 conversion. This routine takes a YUV 420 planar macroblock |
| and converts it to RGB565. R:5 bits, G:6 bits, B:5 bits.. packed into shorts. |
| |
| |
| The following calculation is used for the conversion: |
| |
| r = clipz((y-oy)*cy + crv*(v-128)) |
| g = clipz((y-oy)*cy + cgv*(v-128) + cgu*(u-128)) |
| b = clipz((y-oy)*cy + cbu*(u-128)) |
| |
| y,u,v are prescaled by a factor of 4 i.e. left-shifted to gain precision. |
| |
| |
| New factorization to eliminate the truncation error which was |
| occurring due to the byteop3p. |
| |
| |
| 1) Use the bytop16m to subtract quad bytes we use this in U8 this |
| then so the offsets need to be renormalized to 8bits. |
| |
| 2) Scale operands up by a factor of 4 not 8 because Blackfin |
| multiplies include a shift. |
| |
| 3) Compute into the accumulators cy*yx0, cy*yx1. |
| |
| 4) Compute each of the linear equations: |
| r = clipz((y - oy) * cy + crv * (v - 128)) |
| |
| g = clipz((y - oy) * cy + cgv * (v - 128) + cgu * (u - 128)) |
| |
| b = clipz((y - oy) * cy + cbu * (u - 128)) |
| |
| Reuse of the accumulators requires that we actually multiply |
| twice once with addition and the second time with a subtraction. |
| |
| Because of this we need to compute the equations in the order R B |
| then G saving the writes for B in the case of 24/32 bit color |
| formats. |
| |
| API: yuv2rgb_kind (uint8_t *Y, uint8_t *U, uint8_t *V, int *out, |
| int dW, uint32_t *coeffs); |
| |
| A B |
| --- --- |
| i2 = cb i3 = cr |
| i1 = coeff i0 = y |
| |
| Where coeffs have the following layout in memory. |
| |
| uint32_t oy,oc,zero,cy,crv,rmask,cbu,bmask,cgu,cgv; |
| |
| coeffs is a pointer to oy. |
| |
| The {rgb} masks are only utilized by the 565 packing algorithm. Note the data |
| replication is used to simplify the internal algorithms for the dual Mac |
| architecture of BlackFin. |
| |
| All routines are exported with _ff_bfin_ as a symbol prefix. |
| |
| Rough performance gain compared against -O3: |
| |
| 2779809/1484290 187.28% |
| |
| which translates to ~33c/pel to ~57c/pel for the reference vs 17.5 |
| c/pel for the optimized implementations. Not sure why there is such a |
| huge variation on the reference codes on Blackfin I guess it must have |
| to do with the memory system. |
| */ |
| |
| #define mL3 .text |
| #ifdef __FDPIC__ |
| #define mL1 .l1.text |
| #else |
| #define mL1 mL3 |
| #endif |
| #define MEM mL1 |
| |
| #define DEFUN(fname,where,interface) \ |
| .section where; \ |
| .global _ff_bfin_ ## fname; \ |
| .type _ff_bfin_ ## fname, STT_FUNC; \ |
| .align 8; \ |
| _ff_bfin_ ## fname |
| |
| #define DEFUN_END(fname) \ |
| .size _ff_bfin_ ## fname, . - _ff_bfin_ ## fname |
| |
| |
| .text |
| |
| #define COEFF_LEN 11*4 |
| #define COEFF_REL_CY_OFF 4*4 |
| |
| #define ARG_OUT 20 |
| #define ARG_W 24 |
| #define ARG_COEFF 28 |
| |
| DEFUN(yuv2rgb565_line,MEM, |
| (uint8_t *Y, uint8_t *U, uint8_t *V, int *out, int dW, uint32_t *coeffs)): |
| link 0; |
| [--sp] = (r7:4); |
| p1 = [fp+ARG_OUT]; |
| r3 = [fp+ARG_W]; |
| |
| i0 = r0; |
| i2 = r1; |
| i3 = r2; |
| |
| r0 = [fp+ARG_COEFF]; |
| i1 = r0; |
| b1 = i1; |
| l1 = COEFF_LEN; |
| m0 = COEFF_REL_CY_OFF; |
| p0 = r3; |
| |
| r0 = [i0++]; // 2Y |
| r1.l = w[i2++]; // 2u |
| r1.h = w[i3++]; // 2v |
| p0 = p0>>2; |
| |
| lsetup (.L0565, .L1565) lc0 = p0; |
| |
| /* |
| uint32_t oy,oc,zero,cy,crv,rmask,cbu,bmask,cgu,cgv |
| r0 -- used to load 4ys |
| r1 -- used to load 2us,2vs |
| r4 -- y3,y2 |
| r5 -- y1,y0 |
| r6 -- u1,u0 |
| r7 -- v1,v0 |
| */ |
| r2=[i1++]; // oy |
| .L0565: |
| /* |
| rrrrrrrr gggggggg bbbbbbbb |
| 5432109876543210 |
| bbbbb >>3 |
| gggggggg <<3 |
| rrrrrrrr <<8 |
| rrrrrggggggbbbbb |
| */ |
| (r4,r5) = byteop16m (r1:0, r3:2) || r3=[i1++]; // oc |
| (r7,r6) = byteop16m (r1:0, r3:2) (r); |
| r5 = r5 << 2 (v); // y1,y0 |
| r4 = r4 << 2 (v); // y3,y2 |
| r6 = r6 << 2 (v) || r0=[i1++]; // u1,u0, r0=zero |
| r7 = r7 << 2 (v) || r1=[i1++]; // v1,v0 r1=cy |
| /* Y' = y*cy */ |
| a1 = r1.h*r5.h, a0 = r1.l*r5.l || r1=[i1++]; // crv |
| |
| /* R = Y+ crv*(Cr-128) */ |
| r2.h = (a1 += r1.h*r7.l), r2.l = (a0 += r1.l*r7.l); |
| a1 -= r1.h*r7.l, a0 -= r1.l*r7.l || r5=[i1++]; // rmask |
| r2 = byteop3p(r3:2, r1:0)(LO) || r1=[i1++]; // cbu |
| r2 = r2 >> 3 (v); |
| r3 = r2 & r5; |
| |
| /* B = Y+ cbu*(Cb-128) */ |
| r2.h = (a1 += r1.h*r6.l), r2.l = (a0 += r1.l*r6.l); |
| a1 -= r1.h*r6.l, a0 -= r1.l*r6.l || r5=[i1++]; // bmask |
| r2 = byteop3p(r3:2, r1:0)(LO) || r1=[i1++]; // cgu |
| r2 = r2 << 8 (v); |
| r2 = r2 & r5; |
| r3 = r3 | r2; |
| |
| /* G = Y+ cgu*(Cb-128)+cgv*(Cr-128) */ |
| a1 += r1.h*r6.l, a0 += r1.l*r6.l || r1=[i1++]; // cgv |
| r2.h = (a1 += r1.h*r7.l), r2.l = (a0 += r1.l*r7.l); |
| r2 = byteop3p(r3:2, r1:0)(LO) || r5=[i1++m0]; // gmask |
| r2 = r2 << 3 (v); |
| r2 = r2 & r5; |
| r3 = r3 | r2; |
| [p1++]=r3 || r1=[i1++]; // cy |
| |
| /* Y' = y*cy */ |
| |
| a1 = r1.h*r4.h, a0 = r1.l*r4.l || r1=[i1++]; // crv |
| |
| /* R = Y+ crv*(Cr-128) */ |
| r2.h = (a1 += r1.h*r7.h), r2.l = (a0 += r1.l*r7.h); |
| a1 -= r1.h*r7.h, a0 -= r1.l*r7.h || r5=[i1++]; // rmask |
| r2 = byteop3p(r3:2, r1:0)(LO) || r1=[i1++]; // cbu |
| r2 = r2 >> 3 (v); |
| r3 = r2 & r5; |
| |
| /* B = Y+ cbu*(Cb-128) */ |
| r2.h = (a1 += r1.h*r6.h), r2.l = (a0 += r1.l*r6.h); |
| a1 -= r1.h*r6.h, a0 -= r1.l*r6.h || r5=[i1++]; // bmask |
| r2 = byteop3p(r3:2, r1:0)(LO) || r1=[i1++]; // cgu |
| r2 = r2 << 8 (v); |
| r2 = r2 & r5; |
| r3 = r3 | r2; |
| |
| /* G = Y+ cgu*(Cb-128)+cgv*(Cr-128) */ |
| a1 += r1.h*r6.h, a0 += r1.l*r6.h || r1=[i1++]; // cgv |
| r2.h = (a1 += r1.h*r7.h), r2.l = (a0 += r1.l*r7.h) || r5=[i1++]; // gmask |
| r2 = byteop3p(r3:2, r1:0)(LO) || r0 = [i0++]; // 2Y |
| r2 = r2 << 3 (v) || r1.l = w[i2++]; // 2u |
| r2 = r2 & r5; |
| r3 = r3 | r2; |
| [p1++]=r3 || r1.h = w[i3++]; // 2v |
| .L1565: r2=[i1++]; // oy |
| |
| l1 = 0; |
| |
| (r7:4) = [sp++]; |
| unlink; |
| rts; |
| DEFUN_END(yuv2rgb565_line) |
| |
| DEFUN(yuv2rgb555_line,MEM, |
| (uint8_t *Y, uint8_t *U, uint8_t *V, int *out, int dW, uint32_t *coeffs)): |
| link 0; |
| [--sp] = (r7:4); |
| p1 = [fp+ARG_OUT]; |
| r3 = [fp+ARG_W]; |
| |
| i0 = r0; |
| i2 = r1; |
| i3 = r2; |
| |
| r0 = [fp+ARG_COEFF]; |
| i1 = r0; |
| b1 = i1; |
| l1 = COEFF_LEN; |
| m0 = COEFF_REL_CY_OFF; |
| p0 = r3; |
| |
| r0 = [i0++]; // 2Y |
| r1.l = w[i2++]; // 2u |
| r1.h = w[i3++]; // 2v |
| p0 = p0>>2; |
| |
| lsetup (.L0555, .L1555) lc0 = p0; |
| |
| /* |
| uint32_t oy,oc,zero,cy,crv,rmask,cbu,bmask,cgu,cgv |
| r0 -- used to load 4ys |
| r1 -- used to load 2us,2vs |
| r4 -- y3,y2 |
| r5 -- y1,y0 |
| r6 -- u1,u0 |
| r7 -- v1,v0 |
| */ |
| r2=[i1++]; // oy |
| .L0555: |
| /* |
| rrrrrrrr gggggggg bbbbbbbb |
| 5432109876543210 |
| bbbbb >>3 |
| gggggggg <<2 |
| rrrrrrrr <<7 |
| xrrrrrgggggbbbbb |
| */ |
| |
| (r4,r5) = byteop16m (r1:0, r3:2) || r3=[i1++]; // oc |
| (r7,r6) = byteop16m (r1:0, r3:2) (r); |
| r5 = r5 << 2 (v); // y1,y0 |
| r4 = r4 << 2 (v); // y3,y2 |
| r6 = r6 << 2 (v) || r0=[i1++]; // u1,u0, r0=zero |
| r7 = r7 << 2 (v) || r1=[i1++]; // v1,v0 r1=cy |
| /* Y' = y*cy */ |
| a1 = r1.h*r5.h, a0 = r1.l*r5.l || r1=[i1++]; // crv |
| |
| /* R = Y+ crv*(Cr-128) */ |
| r2.h = (a1 += r1.h*r7.l), r2.l = (a0 += r1.l*r7.l); |
| a1 -= r1.h*r7.l, a0 -= r1.l*r7.l || r5=[i1++]; // rmask |
| r2 = byteop3p(r3:2, r1:0)(LO) || r1=[i1++]; // cbu |
| r2 = r2 >> 3 (v); |
| r3 = r2 & r5; |
| |
| /* B = Y+ cbu*(Cb-128) */ |
| r2.h = (a1 += r1.h*r6.l), r2.l = (a0 += r1.l*r6.l); |
| a1 -= r1.h*r6.l, a0 -= r1.l*r6.l || r5=[i1++]; // bmask |
| r2 = byteop3p(r3:2, r1:0)(LO) || r1=[i1++]; // cgu |
| r2 = r2 << 7 (v); |
| r2 = r2 & r5; |
| r3 = r3 | r2; |
| |
| /* G = Y+ cgu*(Cb-128)+cgv*(Cr-128) */ |
| a1 += r1.h*r6.l, a0 += r1.l*r6.l || r1=[i1++]; // cgv |
| r2.h = (a1 += r1.h*r7.l), r2.l = (a0 += r1.l*r7.l); |
| r2 = byteop3p(r3:2, r1:0)(LO) || r5=[i1++m0]; // gmask |
| r2 = r2 << 2 (v); |
| r2 = r2 & r5; |
| r3 = r3 | r2; |
| [p1++]=r3 || r1=[i1++]; // cy |
| |
| /* Y' = y*cy */ |
| |
| a1 = r1.h*r4.h, a0 = r1.l*r4.l || r1=[i1++]; // crv |
| |
| /* R = Y+ crv*(Cr-128) */ |
| r2.h = (a1 += r1.h*r7.h), r2.l = (a0 += r1.l*r7.h); |
| a1 -= r1.h*r7.h, a0 -= r1.l*r7.h || r5=[i1++]; // rmask |
| r2 = byteop3p(r3:2, r1:0)(LO) || r1=[i1++]; // cbu |
| r2 = r2 >> 3 (v); |
| r3 = r2 & r5; |
| |
| /* B = Y+ cbu*(Cb-128) */ |
| r2.h = (a1 += r1.h*r6.h), r2.l = (a0 += r1.l*r6.h); |
| a1 -= r1.h*r6.h, a0 -= r1.l*r6.h || r5=[i1++]; // bmask |
| r2 = byteop3p(r3:2, r1:0)(LO) || r1=[i1++]; // cgu |
| r2 = r2 << 7 (v); |
| r2 = r2 & r5; |
| r3 = r3 | r2; |
| |
| /* G = Y+ cgu*(Cb-128)+cgv*(Cr-128) */ |
| a1 += r1.h*r6.h, a0 += r1.l*r6.h || r1=[i1++]; // cgv |
| r2.h = (a1 += r1.h*r7.h), r2.l = (a0 += r1.l*r7.h) || r5=[i1++]; // gmask |
| r2 = byteop3p(r3:2, r1:0)(LO) || r0=[i0++]; // 4Y |
| r2 = r2 << 2 (v) || r1.l=w[i2++]; // 2u |
| r2 = r2 & r5; |
| r3 = r3 | r2; |
| [p1++]=r3 || r1.h=w[i3++]; // 2v |
| |
| .L1555: r2=[i1++]; // oy |
| |
| l1 = 0; |
| |
| (r7:4) = [sp++]; |
| unlink; |
| rts; |
| DEFUN_END(yuv2rgb555_line) |
| |
| DEFUN(yuv2rgb24_line,MEM, |
| (uint8_t *Y, uint8_t *U, uint8_t *V, int *out, int dW, uint32_t *coeffs)): |
| link 0; |
| [--sp] = (r7:4); |
| p1 = [fp+ARG_OUT]; |
| r3 = [fp+ARG_W]; |
| p2 = p1; |
| p2 += 3; |
| |
| i0 = r0; |
| i2 = r1; |
| i3 = r2; |
| |
| r0 = [fp+ARG_COEFF]; // coeff buffer |
| i1 = r0; |
| b1 = i1; |
| l1 = COEFF_LEN; |
| m0 = COEFF_REL_CY_OFF; |
| p0 = r3; |
| |
| r0 = [i0++]; // 2Y |
| r1.l = w[i2++]; // 2u |
| r1.h = w[i3++]; // 2v |
| p0 = p0>>2; |
| |
| lsetup (.L0888, .L1888) lc0 = p0; |
| |
| /* |
| uint32_t oy,oc,zero,cy,crv,rmask,cbu,bmask,cgu,cgv |
| r0 -- used to load 4ys |
| r1 -- used to load 2us,2vs |
| r4 -- y3,y2 |
| r5 -- y1,y0 |
| r6 -- u1,u0 |
| r7 -- v1,v0 |
| */ |
| r2=[i1++]; // oy |
| .L0888: |
| (r4,r5) = byteop16m (r1:0, r3:2) || r3=[i1++]; // oc |
| (r7,r6) = byteop16m (r1:0, r3:2) (r); |
| r5 = r5 << 2 (v); // y1,y0 |
| r4 = r4 << 2 (v); // y3,y2 |
| r6 = r6 << 2 (v) || r0=[i1++]; // u1,u0, r0=zero |
| r7 = r7 << 2 (v) || r1=[i1++]; // v1,v0 r1=cy |
| |
| /* Y' = y*cy */ |
| a1 = r1.h*r5.h, a0 = r1.l*r5.l || r1=[i1++]; // crv |
| |
| /* R = Y+ crv*(Cr-128) */ |
| r2.h = (a1 += r1.h*r7.l), r2.l = (a0 += r1.l*r7.l); |
| a1 -= r1.h*r7.l, a0 -= r1.l*r7.l || r5=[i1++]; // rmask |
| r2 = byteop3p(r3:2, r1:0)(LO) || r1=[i1++]; // cbu |
| r2=r2>>16 || B[p1++]=r2; |
| B[p2++]=r2; |
| |
| /* B = Y+ cbu*(Cb-128) */ |
| r2.h = (a1 += r1.h*r6.l), r2.l = (a0 += r1.l*r6.l); |
| a1 -= r1.h*r6.l, a0 -= r1.l*r6.l || r5=[i1++]; // bmask |
| r3 = byteop3p(r3:2, r1:0)(LO) || r1=[i1++]; // cgu |
| |
| /* G = Y+ cgu*(Cb-128)+cgv*(Cr-128) */ |
| a1 += r1.h*r6.l, a0 += r1.l*r6.l || r1=[i1++]; // cgv |
| r2.h = (a1 += r1.h*r7.l), r2.l = (a0 += r1.l*r7.l); |
| r2 = byteop3p(r3:2, r1:0)(LO) || r5=[i1++m0]; // gmask, oy,cy,zero |
| |
| r2=r2>>16 || B[p1++]=r2; |
| B[p2++]=r2; |
| |
| r3=r3>>16 || B[p1++]=r3; |
| B[p2++]=r3 || r1=[i1++]; // cy |
| |
| p1+=3; |
| p2+=3; |
| /* Y' = y*cy */ |
| a1 = r1.h*r4.h, a0 = r1.l*r4.l || r1=[i1++]; // crv |
| |
| /* R = Y+ crv*(Cr-128) */ |
| r2.h = (a1 += r1.h*r7.h), r2.l = (a0 += r1.l*r7.h); |
| a1 -= r1.h*r7.h, a0 -= r1.l*r7.h || r5=[i1++]; // rmask |
| r2 = byteop3p(r3:2, r1:0)(LO) || r1=[i1++]; // cbu |
| r2=r2>>16 || B[p1++]=r2; |
| B[p2++]=r2; |
| |
| /* B = Y+ cbu*(Cb-128) */ |
| r2.h = (a1 += r1.h*r6.h), r2.l = (a0 += r1.l*r6.h); |
| a1 -= r1.h*r6.h, a0 -= r1.l*r6.h || r5=[i1++]; // bmask |
| r3 = byteop3p(r3:2, r1:0)(LO) || r1=[i1++]; // cgu |
| |
| /* G = Y+ cgu*(Cb-128)+cgv*(Cr-128) */ |
| a1 += r1.h*r6.h, a0 += r1.l*r6.h || r1=[i1++]; // cgv |
| r2.h = (a1 += r1.h*r7.h), r2.l = (a0 += r1.l*r7.h); |
| r2 = byteop3p(r3:2, r1:0)(LO) || r5=[i1++]; // gmask |
| r2=r2>>16 || B[p1++]=r2 || r0 = [i0++]; // 4y |
| B[p2++]=r2 || r1.l = w[i2++]; // 2u |
| r3=r3>>16 || B[p1++]=r3 || r1.h = w[i3++]; // 2v |
| B[p2++]=r3 || r2=[i1++]; // oy |
| |
| p1+=3; |
| .L1888: p2+=3; |
| |
| l1 = 0; |
| |
| (r7:4) = [sp++]; |
| unlink; |
| rts; |
| DEFUN_END(yuv2rgb24_line) |
| |
| |
| |
| #define ARG_vdst 20 |
| #define ARG_width 24 |
| #define ARG_height 28 |
| #define ARG_lumStride 32 |
| #define ARG_chromStride 36 |
| #define ARG_srcStride 40 |
| |
| DEFUN(uyvytoyv12, mL3, (const uint8_t *src, uint8_t *ydst, uint8_t *udst, uint8_t *vdst, |
| long width, long height, |
| long lumStride, long chromStride, long srcStride)): |
| link 0; |
| [--sp] = (r7:4,p5:4); |
| |
| p0 = r1; // Y top even |
| |
| i2 = r2; // *u |
| r2 = [fp + ARG_vdst]; |
| i3 = r2; // *v |
| |
| r1 = [fp + ARG_srcStride]; |
| r2 = r0 + r1; |
| r1 += -8; // i0,i1 is pre read need to correct |
| m0 = r1; |
| |
| i0 = r0; // uyvy_T even |
| i1 = r2; // uyvy_B odd |
| |
| p2 = [fp + ARG_lumStride]; |
| p1 = p0 + p2; // Y bot odd |
| |
| p5 = [fp + ARG_width]; |
| p4 = [fp + ARG_height]; |
| r0 = p5; |
| p4 = p4 >> 1; |
| p5 = p5 >> 2; |
| |
| r2 = [fp + ARG_chromStride]; |
| r0 = r0 >> 1; |
| r2 = r2 - r0; |
| m1 = r2; |
| |
| /* I0,I1 - src input line pointers |
| * p0,p1 - luma output line pointers |
| * I2 - dstU |
| * I3 - dstV |
| */ |
| |
| lsetup (0f, 1f) lc1 = p4; // H/2 |
| 0: r0 = [i0++] || r2 = [i1++]; |
| r1 = [i0++] || r3 = [i1++]; |
| r4 = byteop1p(r1:0, r3:2); |
| r5 = byteop1p(r1:0, r3:2) (r); |
| lsetup (2f, 3f) lc0 = p5; // W/4 |
| 2: r0 = r0 >> 8(v); |
| r1 = r1 >> 8(v); |
| r2 = r2 >> 8(v); |
| r3 = r3 >> 8(v); |
| r0 = bytepack(r0, r1); |
| r2 = bytepack(r2, r3) || [p0++] = r0; // yyyy |
| r6 = pack(r5.l, r4.l) || [p1++] = r2; // yyyy |
| r7 = pack(r5.h, r4.h) || r0 = [i0++] || r2 = [i1++]; |
| r6 = bytepack(r6, r7) || r1 = [i0++] || r3 = [i1++]; |
| r4 = byteop1p(r1:0, r3:2) || w[i2++] = r6.l; // uu |
| 3: r5 = byteop1p(r1:0, r3:2) (r) || w[i3++] = r6.h; // vv |
| |
| i0 += m0; |
| i1 += m0; |
| i2 += m1; |
| i3 += m1; |
| p0 = p0 + p2; |
| 1: p1 = p1 + p2; |
| |
| (r7:4,p5:4) = [sp++]; |
| unlink; |
| rts; |
| DEFUN_END(uyvytoyv12) |
| |
| DEFUN(yuyvtoyv12, mL3, (const uint8_t *src, uint8_t *ydst, uint8_t *udst, uint8_t *vdst, |
| long width, long height, |
| long lumStride, long chromStride, long srcStride)): |
| link 0; |
| [--sp] = (r7:4,p5:4); |
| |
| p0 = r1; // Y top even |
| |
| i2 = r2; // *u |
| r2 = [fp + ARG_vdst]; |
| i3 = r2; // *v |
| |
| r1 = [fp + ARG_srcStride]; |
| r2 = r0 + r1; |
| r1 += -8; // i0,i1 is pre read need to correct |
| m0 = r1; |
| |
| i0 = r0; // uyvy_T even |
| i1 = r2; // uyvy_B odd |
| |
| p2 = [fp + ARG_lumStride]; |
| p1 = p0 + p2; // Y bot odd |
| |
| p5 = [fp + ARG_width]; |
| p4 = [fp + ARG_height]; |
| r0 = p5; |
| p4 = p4 >> 1; |
| p5 = p5 >> 2; |
| |
| r2 = [fp + ARG_chromStride]; |
| r0 = r0 >> 1; |
| r2 = r2 - r0; |
| m1 = r2; |
| |
| /* I0,I1 - src input line pointers |
| * p0,p1 - luma output line pointers |
| * I2 - dstU |
| * I3 - dstV |
| */ |
| |
| lsetup (0f, 1f) lc1 = p4; // H/2 |
| 0: r0 = [i0++] || r2 = [i1++]; |
| r1 = [i0++] || r3 = [i1++]; |
| r4 = bytepack(r0, r1); |
| r5 = bytepack(r2, r3); |
| lsetup (2f, 3f) lc0 = p5; // W/4 |
| 2: r0 = r0 >> 8(v) || [p0++] = r4; // yyyy-even |
| r1 = r1 >> 8(v) || [p1++] = r5; // yyyy-odd |
| r2 = r2 >> 8(v); |
| r3 = r3 >> 8(v); |
| r4 = byteop1p(r1:0, r3:2); |
| r5 = byteop1p(r1:0, r3:2) (r); |
| r6 = pack(r5.l, r4.l); |
| r7 = pack(r5.h, r4.h) || r0 = [i0++] || r2 = [i1++]; |
| r6 = bytepack(r6, r7) || r1 = [i0++] || r3 = [i1++]; |
| r4 = bytepack(r0, r1) || w[i2++] = r6.l; // uu |
| 3: r5 = bytepack(r2, r3) || w[i3++] = r6.h; // vv |
| |
| i0 += m0; |
| i1 += m0; |
| i2 += m1; |
| i3 += m1; |
| p0 = p0 + p2; |
| 1: p1 = p1 + p2; |
| |
| (r7:4,p5:4) = [sp++]; |
| unlink; |
| rts; |
| DEFUN_END(yuyvtoyv12) |
