/* * ARM NEON optimised IDCT functions for HEVC decoding * Copyright (c) 2014 Seppo Tomperi * Copyright (c) 2017 Alexandra Hájková * * 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 */ #include "libavutil/arm/asm.S" const trans, align=4 .short 64, 83, 64, 36 .short 89, 75, 50, 18 .short 90, 87, 80, 70 .short 57, 43, 25, 9 endconst function ff_hevc_idct_4x4_dc_neon_8, export=1 ldrsh r1, [r0] ldr r2, =0x20 add r1, #1 asr r1, #1 add r1, r2 asr r1, #6 vdup.16 q0, r1 vdup.16 q1, r1 vst1.16 {q0, q1}, [r0] bx lr endfunc function ff_hevc_idct_8x8_dc_neon_8, export=1 ldrsh r1, [r0] ldr r2, =0x20 add r1, #1 asr r1, #1 add r1, r2 asr r1, #6 vdup.16 q8, r1 vdup.16 q9, r1 vmov.16 q10, q8 vmov.16 q11, q8 vmov.16 q12, q8 vmov.16 q13, q8 vmov.16 q14, q8 vmov.16 q15, q8 vstm r0, {q8-q15} bx lr endfunc function ff_hevc_idct_16x16_dc_neon_8, export=1 ldrsh r1, [r0] ldr r2, =0x20 add r1, #1 asr r1, #1 add r1, r2 asr r1, #6 vdup.16 q8, r1 vdup.16 q9, r1 vmov.16 q10, q8 vmov.16 q11, q8 vmov.16 q12, q8 vmov.16 q13, q8 vmov.16 q14, q8 vmov.16 q15, q8 vstm r0!, {q8-q15} vstm r0!, {q8-q15} vstm r0!, {q8-q15} vstm r0, {q8-q15} bx lr endfunc function ff_hevc_idct_32x32_dc_neon_8, export=1 ldrsh r1, [r0] ldr r2, =0x20 add r1, #1 asr r1, #1 add r1, r2 asr r1, #6 mov r3, #16 vdup.16 q8, r1 vdup.16 q9, r1 vmov.16 q10, q8 vmov.16 q11, q8 vmov.16 q12, q8 vmov.16 q13, q8 vmov.16 q14, q8 vmov.16 q15, q8 1: subs r3, #1 vstm r0!, {q8-q15} bne 1b bx lr endfunc function ff_hevc_add_residual_4x4_neon_8, export=1 vldm r1, {q0-q1} vld1.32 d4[0], [r0], r2 vld1.32 d4[1], [r0], r2 vld1.32 d5[0], [r0], r2 vld1.32 d5[1], [r0], r2 sub r0, r0, r2, lsl #2 vmovl.u8 q8, d4 vmovl.u8 q9, d5 vqadd.s16 q0, q0, q8 vqadd.s16 q1, q1, q9 vqmovun.s16 d0, q0 vqmovun.s16 d1, q1 vst1.32 d0[0], [r0], r2 vst1.32 d0[1], [r0], r2 vst1.32 d1[0], [r0], r2 vst1.32 d1[1], [r0], r2 bx lr endfunc function ff_hevc_add_residual_8x8_neon_8, export=1 mov r3, #8 1: subs r3, #1 vld1.16 {q0}, [r1]! vld1.8 d16, [r0] vmovl.u8 q8, d16 vqadd.s16 q0, q8 vqmovun.s16 d0, q0 vst1.32 d0, [r0], r2 bne 1b bx lr endfunc function ff_hevc_add_residual_16x16_neon_8, export=1 mov r3, #16 1: subs r3, #1 vld1.16 {q0, q1}, [r1]! vld1.8 {q8}, [r0] vmovl.u8 q9, d16 vmovl.u8 q10, d17 vqadd.s16 q0, q9 vqadd.s16 q1, q10 vqmovun.s16 d0, q0 vqmovun.s16 d1, q1 vst1.8 {q0}, [r0], r2 bne 1b bx lr endfunc function ff_hevc_add_residual_32x32_neon_8, export=1 mov r3, #32 1: subs r3, #1 vldm r1!, {q0-q3} vld1.8 {q8, q9}, [r0] vmovl.u8 q10, d16 vmovl.u8 q11, d17 vmovl.u8 q12, d18 vmovl.u8 q13, d19 vqadd.s16 q0, q10 vqadd.s16 q1, q11 vqadd.s16 q2, q12 vqadd.s16 q3, q13 vqmovun.s16 d0, q0 vqmovun.s16 d1, q1 vqmovun.s16 d2, q2 vqmovun.s16 d3, q3 vst1.8 {q0, q1}, [r0], r2 bne 1b bx lr endfunc /* uses registers q2 - q9 for temp values */ /* TODO: reorder */ .macro tr4_luma_shift r0, r1, r2, r3, shift vaddl.s16 q5, \r0, \r2 // c0 = src0 + src2 vaddl.s16 q2, \r2, \r3 // c1 = src2 + src3 vsubl.s16 q4, \r0, \r3 // c2 = src0 - src3 vmull.s16 q6, \r1, d0[0] // c3 = 74 * src1 vaddl.s16 q7, \r0, \r3 // src0 + src3 vsubw.s16 q7, q7, \r2 // src0 - src2 + src3 vmul.s32 q7, q7, d0[0] // dst2 = 74 * (src0 - src2 + src3) vmul.s32 q8, q5, d0[1] // 29 * c0 vmul.s32 q9, q2, d1[0] // 55 * c1 vadd.s32 q8, q9 // 29 * c0 + 55 * c1 vadd.s32 q8, q6 // dst0 = 29 * c0 + 55 * c1 + c3 vmul.s32 q2, q2, d0[1] // 29 * c1 vmul.s32 q9, q4, d1[0] // 55 * c2 vsub.s32 q9, q2 // 55 * c2 - 29 * c1 vadd.s32 q9, q6 // dst1 = 55 * c2 - 29 * c1 + c3 vmul.s32 q5, q5, d1[0] // 55 * c0 vmul.s32 q4, q4, d0[1] // 29 * c2 vadd.s32 q5, q4 // 55 * c0 + 29 * c2 vsub.s32 q5, q6 // dst3 = 55 * c0 + 29 * c2 - c3 vqrshrn.s32 \r0, q8, \shift vqrshrn.s32 \r1, q9, \shift vqrshrn.s32 \r2, q7, \shift vqrshrn.s32 \r3, q5, \shift .endm function ff_hevc_transform_luma_4x4_neon_8, export=1 vpush {d8-d15} vld1.16 {q14, q15}, [r0] // coeffs ldr r3, =0x4a // 74 vmov.32 d0[0], r3 ldr r3, =0x1d // 29 vmov.32 d0[1], r3 ldr r3, =0x37 // 55 vmov.32 d1[0], r3 tr4_luma_shift d28, d29, d30, d31, #7 vtrn.16 d28, d29 vtrn.16 d30, d31 vtrn.32 q14, q15 tr4_luma_shift d28, d29, d30, d31, #12 vtrn.16 d28, d29 vtrn.16 d30, d31 vtrn.32 q14, q15 vst1.16 {q14, q15}, [r0] vpop {d8-d15} bx lr endfunc .macro sum_sub out, in, c, op .ifc \op, + vmlal.s16 \out, \in, \c .else vmlsl.s16 \out, \in, \c .endif .endm .macro tr_4x4 in0, in1, in2, in3, out0, out1, out2, out3, shift, tmp0, tmp1, tmp2, tmp3, tmp4 vshll.s16 \tmp0, \in0, #6 vmull.s16 \tmp2, \in1, d4[1] vmov \tmp1, \tmp0 vmull.s16 \tmp3, \in1, d4[3] vmlal.s16 \tmp0, \in2, d4[0] @e0 vmlsl.s16 \tmp1, \in2, d4[0] @e1 vmlal.s16 \tmp2, \in3, d4[3] @o0 vmlsl.s16 \tmp3, \in3, d4[1] @o1 vadd.s32 \tmp4, \tmp0, \tmp2 vsub.s32 \tmp0, \tmp0, \tmp2 vadd.s32 \tmp2, \tmp1, \tmp3 vsub.s32 \tmp1, \tmp1, \tmp3 vqrshrn.s32 \out0, \tmp4, #\shift vqrshrn.s32 \out3, \tmp0, #\shift vqrshrn.s32 \out1, \tmp2, #\shift vqrshrn.s32 \out2, \tmp1, #\shift .endm .macro tr_4x4_8 in0, in1, in2, in3, out0, out1, out2, out3, tmp0, tmp1, tmp2, tmp3 vshll.s16 \tmp0, \in0, #6 vld1.s16 {\in0}, [r1, :64]! vmov \tmp1, \tmp0 vmull.s16 \tmp2, \in1, \in0[1] vmull.s16 \tmp3, \in1, \in0[3] vmlal.s16 \tmp0, \in2, \in0[0] @e0 vmlsl.s16 \tmp1, \in2, \in0[0] @e1 vmlal.s16 \tmp2, \in3, \in0[3] @o0 vmlsl.s16 \tmp3, \in3, \in0[1] @o1 vld1.s16 {\in0}, [r1, :64] vadd.s32 \out0, \tmp0, \tmp2 vadd.s32 \out1, \tmp1, \tmp3 vsub.s32 \out2, \tmp1, \tmp3 vsub.s32 \out3, \tmp0, \tmp2 sub r1, r1, #8 .endm @ Do a 4x4 transpose, using q registers for the subtransposes that don't @ need to address the indiviudal d registers. @ r0,r1 == rq0, r2,r3 == rq1 .macro transpose_4x4 rq0, rq1, r0, r1, r2, r3 vtrn.32 \rq0, \rq1 vtrn.16 \r0, \r1 vtrn.16 \r2, \r3 .endm .macro idct_4x4 bitdepth function ff_hevc_idct_4x4_\bitdepth\()_neon, export=1 @r0 - coeffs vld1.s16 {q0-q1}, [r0, :128] movrel r1, trans vld1.s16 {d4}, [r1, :64] tr_4x4 d0, d1, d2, d3, d16, d17, d18, d19, 7, q10, q11, q12, q13, q0 transpose_4x4 q8, q9, d16, d17, d18, d19 tr_4x4 d16, d17, d18, d19, d0, d1, d2, d3, 20 - \bitdepth, q10, q11, q12, q13, q0 transpose_4x4 q0, q1, d0, d1, d2, d3 vst1.s16 {d0-d3}, [r0, :128] bx lr endfunc .endm .macro transpose8_4x4 r0, r1, r2, r3 vtrn.16 \r0, \r1 vtrn.16 \r2, \r3 vtrn.32 \r0, \r2 vtrn.32 \r1, \r3 .endm .macro transpose_8x8 r0, r1, r2, r3, r4, r5, r6, r7, l0, l1, l2, l3, l4, l5, l6, l7 transpose8_4x4 \r0, \r1, \r2, \r3 transpose8_4x4 \r4, \r5, \r6, \r7 transpose8_4x4 \l0, \l1, \l2, \l3 transpose8_4x4 \l4, \l5, \l6, \l7 .endm .macro tr_8x4 shift, in0, in1, in2, in3, in4, in5, in6, in7 tr_4x4_8 \in0, \in2, \in4, \in6, q8, q9, q10, q11, q12, q13, q14, q15 vmull.s16 q14, \in1, \in0[2] vmull.s16 q12, \in1, \in0[0] vmull.s16 q13, \in1, \in0[1] sum_sub q14, \in3, \in0[0], - sum_sub q12, \in3, \in0[1], + sum_sub q13, \in3, \in0[3], - sum_sub q14, \in5, \in0[3], + sum_sub q12, \in5, \in0[2], + sum_sub q13, \in5, \in0[0], - sum_sub q14, \in7, \in0[1], + sum_sub q12, \in7, \in0[3], + sum_sub q13, \in7, \in0[2], - vadd.s32 q15, q10, q14 vsub.s32 q10, q10, q14 vqrshrn.s32 \in2, q15, \shift vmull.s16 q15, \in1, \in0[3] sum_sub q15, \in3, \in0[2], - sum_sub q15, \in5, \in0[1], + sum_sub q15, \in7, \in0[0], - vqrshrn.s32 \in5, q10, \shift vadd.s32 q10, q8, q12 vsub.s32 q8, q8, q12 vadd.s32 q12, q9, q13 vsub.s32 q9, q9, q13 vadd.s32 q14, q11, q15 vsub.s32 q11, q11, q15 vqrshrn.s32 \in0, q10, \shift vqrshrn.s32 \in7, q8, \shift vqrshrn.s32 \in1, q12, \shift vqrshrn.s32 \in6, q9, \shift vqrshrn.s32 \in3, q14, \shift vqrshrn.s32 \in4, q11, \shift .endm .macro idct_8x8 bitdepth function ff_hevc_idct_8x8_\bitdepth\()_neon, export=1 @r0 - coeffs vpush {q4-q7} mov r1, r0 mov r2, #64 add r3, r0, #32 vld1.s16 {q0-q1}, [r1,:128], r2 vld1.s16 {q2-q3}, [r3,:128], r2 vld1.s16 {q4-q5}, [r1,:128], r2 vld1.s16 {q6-q7}, [r3,:128], r2 movrel r1, trans tr_8x4 7, d0, d2, d4, d6, d8, d10, d12, d14 tr_8x4 7, d1, d3, d5, d7, d9, d11, d13, d15 @ Transpose each 4x4 block, and swap how d4-d7 and d8-d11 are used. @ Layout before: @ d0 d1 @ d2 d3 @ d4 d5 @ d6 d7 @ d8 d9 @ d10 d11 @ d12 d13 @ d14 d15 transpose_8x8 d0, d2, d4, d6, d8, d10, d12, d14, d1, d3, d5, d7, d9, d11, d13, d15 @ Now the layout is: @ d0 d8 @ d2 d10 @ d4 d12 @ d6 d14 @ d1 d9 @ d3 d11 @ d5 d13 @ d7 d15 tr_8x4 20 - \bitdepth, d0, d2, d4, d6, d1, d3, d5, d7 vswp d0, d8 tr_8x4 20 - \bitdepth, d0, d10, d12, d14, d9, d11, d13, d15 vswp d0, d8 transpose_8x8 d0, d2, d4, d6, d8, d10, d12, d14, d1, d3, d5, d7, d9, d11, d13, d15 mov r1, r0 mov r2, #64 add r3, r0, #32 vst1.s16 {q0-q1}, [r1,:128], r2 vst1.s16 {q2-q3}, [r3,:128], r2 vst1.s16 {q4-q5}, [r1,:128], r2 vst1.s16 {q6-q7}, [r3,:128], r2 vpop {q4-q7} bx lr endfunc .endm idct_4x4 8 idct_4x4 10 idct_8x8 8 idct_8x8 10