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ffmpeg / libavcodec / arm / mpegvideo_neon.S @ 2912e87a

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/*
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 * Copyright (c) 2010 Mans Rullgard
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 *
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 * This file is part of Libav.
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 *
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 * Libav is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * Libav is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with Libav; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#include "asm.S"
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#include "asm-offsets.h"
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function ff_dct_unquantize_h263_inter_neon, export=1
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        add             r12, r0,  #BLOCK_LAST_INDEX
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        ldr             r12, [r12, r2, lsl #2]
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        add             r0,  r0,  #INTER_SCANTAB_RASTER_END
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        ldrb            r12, [r0, r12]
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        sub             r2,  r3,  #1
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        lsl             r0,  r3,  #1
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        orr             r2,  r2,  #1
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        add             r3,  r12, #1
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endfunc
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function ff_dct_unquantize_h263_neon, export=1
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        vdup.16         q15, r0                 @ qmul
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        vdup.16         q14, r2                 @ qadd
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        vneg.s16        q13, q14
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        cmp             r3,  #4
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        mov             r0,  r1
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        ble             2f
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1:
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        vld1.16         {q0},     [r0,:128]!
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        vclt.s16        q3,  q0,  #0
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        vld1.16         {q8},     [r0,:128]!
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        vceq.s16        q1,  q0,  #0
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        vmul.s16        q2,  q0,  q15
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        vclt.s16        q11, q8,  #0
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        vmul.s16        q10, q8,  q15
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        vbsl            q3,  q13, q14
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        vbsl            q11, q13, q14
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        vadd.s16        q2,  q2,  q3
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        vceq.s16        q9,  q8,  #0
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        vadd.s16        q10, q10, q11
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        vbif            q0,  q2,  q1
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        vbif            q8,  q10, q9
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        subs            r3,  r3,  #16
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        vst1.16         {q0},     [r1,:128]!
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        vst1.16         {q8},     [r1,:128]!
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        bxle            lr
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        cmp             r3,  #8
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        bgt             1b
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2:
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        vld1.16         {d0},     [r0,:64]
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        vclt.s16        d3,  d0,  #0
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        vceq.s16        d1,  d0,  #0
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        vmul.s16        d2,  d0,  d30
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        vbsl            d3,  d26, d28
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        vadd.s16        d2,  d2,  d3
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        vbif            d0,  d2,  d1
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        vst1.16         {d0},     [r1,:64]
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        bx              lr
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endfunc
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function ff_dct_unquantize_h263_intra_neon, export=1
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        push            {r4-r6,lr}
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        add             r12, r0,  #BLOCK_LAST_INDEX
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        ldr             r6,  [r0, #AC_PRED]
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        add             lr,  r0,  #INTER_SCANTAB_RASTER_END
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        cmp             r6,  #0
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        movne           r12, #63
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        bne             1f
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        ldr             r12, [r12, r2, lsl #2]
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        ldrb            r12, [lr, r12]
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1:      ldr             r5,  [r0, #H263_AIC]
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        ldrsh           r4,  [r1]
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        cmp             r5,  #0
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        mov             r5,  r1
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        movne           r2,  #0
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        bne             2f
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        cmp             r2,  #4
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        addge           r0,  r0,  #4
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        sub             r2,  r3,  #1
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        ldr             r6,  [r0, #Y_DC_SCALE]
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        orr             r2,  r2,  #1
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        smulbb          r4,  r4,  r6
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2:      lsl             r0,  r3,  #1
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        add             r3,  r12, #1
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        bl              ff_dct_unquantize_h263_neon
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        vmov.16         d0[0], r4
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        vst1.16         {d0[0]},  [r5]
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        pop             {r4-r6,pc}
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endfunc