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Diffstat (limited to 'libswscale/bfin/internal_bfin.S')
| -rw-r--r-- | libswscale/bfin/internal_bfin.S | 606 |
1 files changed, 606 insertions, 0 deletions
diff --git a/libswscale/bfin/internal_bfin.S b/libswscale/bfin/internal_bfin.S new file mode 100644 index 0000000000..fb7bda7e12 --- /dev/null +++ b/libswscale/bfin/internal_bfin.S @@ -0,0 +1,606 @@ +/* + * 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) |