80 lines
2.5 KiB
C
80 lines
2.5 KiB
C
/*
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* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include <math.h>
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#include "vpx_mem/vpx_mem.h"
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#include "vp8/encoder/quantize.h"
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#include "vp8/common/entropy.h"
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DECLARE_ALIGNED(16, const short, vp8_rvsplus1_default_zig_zag1d[16]) =
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{
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1, 2, 6, 7,
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3, 5, 8, 13,
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4, 9, 12, 14,
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10, 11, 15, 16,
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};
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extern int vp8_fast_quantize_b_neon_func(short *coeff_ptr, short *zbin_ptr, short *qcoeff_ptr, short *dqcoeff_ptr, short *dequant_ptr, const short *scan_mask, short *round_ptr, short *quant_ptr);
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void vp8_fast_quantize_b_neon(BLOCK *b, BLOCKD *d)
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{
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d->eob = vp8_fast_quantize_b_neon_func(b->coeff, b->zbin, d->qcoeff, d->dqcoeff, d->dequant, vp8_rvsplus1_default_zig_zag1d, b->round, b->quant_fast);
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}
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/*
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//neon code is written according to the following rewritten c code
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void vp8_fast_quantize_b_neon(BLOCK *b,BLOCKD *d)
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{
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int i, rc, eob;
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int zbin;
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int x, x1, y, z, sz;
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short *coeff_ptr = &b->Coeff[0];
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short *zbin_ptr = &b->Zbin[0][0];
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short *round_ptr = &b->Round[0][0];
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short *quant_ptr = &b->Quant[0][0];
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short *qcoeff_ptr = d->qcoeff;
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short *dqcoeff_ptr= d->dqcoeff;
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short *dequant_ptr= &d->Dequant[0][0];
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eob = 0;
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for(i=0;i<16;i++)
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{
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z = coeff_ptr[i];
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zbin = zbin_ptr[i] ;
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x = abs(z); // x = abs(z)
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if(x>=zbin)
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{
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sz = (z>>31); // sign of z
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y = ((x+round_ptr[i])*quant_ptr[i])>>16; // quantize (x)
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x1 = (y^sz) - sz; // get the sign back
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qcoeff_ptr[i] = x1; // write to destination
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dqcoeff_ptr[i] = x1 * dequant_ptr[i]; // dequantized value
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if(y)
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{
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if(eob<vp8_rvsplus1_default_zig_zag1d[i])
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eob=(int)vp8_rvsplus1_default_zig_zag1d[i]; // last nonzero coeffs
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}
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}else
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{
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qcoeff_ptr[i] = 0; // write to destination
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dqcoeff_ptr[i] = 0; // dequantized value
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}
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}
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d->eob = eob;
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}
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*/
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