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/*
* Copyright (c) 2002 Falk Hueffner <falk@debian.org>
*
* 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/attributes.h"
#include "libavcodec/idctdsp.h"
#include "idctdsp_alpha.h"
#include "asm.h"
void put_pixels_clamped_mvi_asm(const int16_t *block, uint8_t *pixels,
int line_size);
void add_pixels_clamped_mvi_asm(const int16_t *block, uint8_t *pixels,
int line_size);
void (*put_pixels_clamped_axp_p)(const int16_t *block, uint8_t *pixels,
int line_size);
void (*add_pixels_clamped_axp_p)(const int16_t *block, uint8_t *pixels,
int line_size);
#if 0
/* These functions were the base for the optimized assembler routines,
and remain here for documentation purposes. */
static void put_pixels_clamped_mvi(const int16_t *block, uint8_t *pixels,
ptrdiff_t line_size)
{
int i = 8;
uint64_t clampmask = zap(-1, 0xaa); /* 0x00ff00ff00ff00ff */
do {
uint64_t shorts0, shorts1;
shorts0 = ldq(block);
shorts0 = maxsw4(shorts0, 0);
shorts0 = minsw4(shorts0, clampmask);
stl(pkwb(shorts0), pixels);
shorts1 = ldq(block + 4);
shorts1 = maxsw4(shorts1, 0);
shorts1 = minsw4(shorts1, clampmask);
stl(pkwb(shorts1), pixels + 4);
pixels += line_size;
block += 8;
} while (--i);
}
void add_pixels_clamped_mvi(const int16_t *block, uint8_t *pixels,
ptrdiff_t line_size)
{
int h = 8;
/* Keep this function a leaf function by generating the constants
manually (mainly for the hack value ;-). */
uint64_t clampmask = zap(-1, 0xaa); /* 0x00ff00ff00ff00ff */
uint64_t signmask = zap(-1, 0x33);
signmask ^= signmask >> 1; /* 0x8000800080008000 */
do {
uint64_t shorts0, pix0, signs0;
uint64_t shorts1, pix1, signs1;
shorts0 = ldq(block);
shorts1 = ldq(block + 4);
pix0 = unpkbw(ldl(pixels));
/* Signed subword add (MMX paddw). */
signs0 = shorts0 & signmask;
shorts0 &= ~signmask;
shorts0 += pix0;
shorts0 ^= signs0;
/* Clamp. */
shorts0 = maxsw4(shorts0, 0);
shorts0 = minsw4(shorts0, clampmask);
/* Next 4. */
pix1 = unpkbw(ldl(pixels + 4));
signs1 = shorts1 & signmask;
shorts1 &= ~signmask;
shorts1 += pix1;
shorts1 ^= signs1;
shorts1 = maxsw4(shorts1, 0);
shorts1 = minsw4(shorts1, clampmask);
stl(pkwb(shorts0), pixels);
stl(pkwb(shorts1), pixels + 4);
pixels += line_size;
block += 8;
} while (--h);
}
#endif
av_cold void ff_idctdsp_init_alpha(IDCTDSPContext *c, AVCodecContext *avctx,
unsigned high_bit_depth)
{
/* amask clears all bits that correspond to present features. */
if (amask(AMASK_MVI) == 0) {
c->put_pixels_clamped = put_pixels_clamped_mvi_asm;
c->add_pixels_clamped = add_pixels_clamped_mvi_asm;
}
put_pixels_clamped_axp_p = c->put_pixels_clamped;
add_pixels_clamped_axp_p = c->add_pixels_clamped;
if (!high_bit_depth && !avctx->lowres &&
(avctx->idct_algo == FF_IDCT_AUTO ||
avctx->idct_algo == FF_IDCT_SIMPLEALPHA)) {
c->idct_put = ff_simple_idct_put_axp;
c->idct_add = ff_simple_idct_add_axp;
c->idct = ff_simple_idct_axp;
}
}
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