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/*
* Copyright (c) 2010 Mans Rullgard
* Copyright (c) 2014 James Yu <james.yu@linaro.org>
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <arm_neon.h>
#include "config.h"
#include "libavutil/cpu.h"
#if ARCH_AARCH64
# include "libavutil/aarch64/cpu.h"
#elif ARCH_ARM
# include "libavutil/arm/cpu.h"
#endif
#include "libavcodec/mpegvideo.h"
static void inline ff_dct_unquantize_h263_neon(int qscale, int qadd, int nCoeffs,
int16_t *block)
{
int16x8_t q0s16, q2s16, q3s16, q8s16, q10s16, q11s16, q13s16;
int16x8_t q14s16, q15s16, qzs16;
int16x4_t d0s16, d2s16, d3s16, dzs16;
uint16x8_t q1u16, q9u16;
uint16x4_t d1u16;
dzs16 = vdup_n_s16(0);
qzs16 = vdupq_n_s16(0);
q15s16 = vdupq_n_s16(qscale << 1);
q14s16 = vdupq_n_s16(qadd);
q13s16 = vnegq_s16(q14s16);
if (nCoeffs > 4) {
for (; nCoeffs > 8; nCoeffs -= 16, block += 16) {
q0s16 = vld1q_s16(block);
q3s16 = vreinterpretq_s16_u16(vcltq_s16(q0s16, qzs16));
q8s16 = vld1q_s16(block + 8);
q1u16 = vceqq_s16(q0s16, qzs16);
q2s16 = vmulq_s16(q0s16, q15s16);
q11s16 = vreinterpretq_s16_u16(vcltq_s16(q8s16, qzs16));
q10s16 = vmulq_s16(q8s16, q15s16);
q3s16 = vbslq_s16(vreinterpretq_u16_s16(q3s16), q13s16, q14s16);
q11s16 = vbslq_s16(vreinterpretq_u16_s16(q11s16), q13s16, q14s16);
q2s16 = vaddq_s16(q2s16, q3s16);
q9u16 = vceqq_s16(q8s16, qzs16);
q10s16 = vaddq_s16(q10s16, q11s16);
q0s16 = vbslq_s16(q1u16, q0s16, q2s16);
q8s16 = vbslq_s16(q9u16, q8s16, q10s16);
vst1q_s16(block, q0s16);
vst1q_s16(block + 8, q8s16);
}
}
if (nCoeffs <= 0)
return;
d0s16 = vld1_s16(block);
d3s16 = vreinterpret_s16_u16(vclt_s16(d0s16, dzs16));
d1u16 = vceq_s16(d0s16, dzs16);
d2s16 = vmul_s16(d0s16, vget_high_s16(q15s16));
d3s16 = vbsl_s16(vreinterpret_u16_s16(d3s16),
vget_high_s16(q13s16), vget_high_s16(q14s16));
d2s16 = vadd_s16(d2s16, d3s16);
d0s16 = vbsl_s16(d1u16, d0s16, d2s16);
vst1_s16(block, d0s16);
}
static void dct_unquantize_h263_inter_neon(MpegEncContext *s, int16_t *block,
int n, int qscale)
{
int nCoeffs = s->inter_scantable.raster_end[s->block_last_index[n]];
int qadd = (qscale - 1) | 1;
ff_dct_unquantize_h263_neon(qscale, qadd, nCoeffs + 1, block);
}
static void dct_unquantize_h263_intra_neon(MpegEncContext *s, int16_t *block,
int n, int qscale)
{
int qadd;
int nCoeffs, blk0;
if (!s->h263_aic) {
if (n < 4)
block[0] *= s->y_dc_scale;
else
block[0] *= s->c_dc_scale;
qadd = (qscale - 1) | 1;
} else {
qadd = 0;
}
if (s->ac_pred) {
nCoeffs = 63;
} else {
nCoeffs = s->inter_scantable.raster_end[s->block_last_index[n]];
if (nCoeffs <= 0)
return;
}
blk0 = block[0];
ff_dct_unquantize_h263_neon(qscale, qadd, nCoeffs + 1, block);
block[0] = blk0;
}
av_cold void ff_mpv_common_init_neon(MpegEncContext *s)
{
int cpu_flags = av_get_cpu_flags();
if (have_neon(cpu_flags)) {
s->dct_unquantize_h263_intra = dct_unquantize_h263_intra_neon;
s->dct_unquantize_h263_inter = dct_unquantize_h263_inter_neon;
}
}
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