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FFmpeg/libavcodec/diracdsp.c

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/*
* Copyright (C) 2009 David Conrad
*
* 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 "avcodec.h"
#include "diracdsp.h"
#define FILTER(src, stride) \
((21*((src)[ 0*stride] + (src)[1*stride]) \
-7*((src)[-1*stride] + (src)[2*stride]) \
+3*((src)[-2*stride] + (src)[3*stride]) \
-1*((src)[-3*stride] + (src)[4*stride]) + 16) >> 5)
static void dirac_hpel_filter(uint8_t *dsth, uint8_t *dstv, uint8_t *dstc, const uint8_t *src,
int stride, int width, int height)
{
int x, y;
for (y = 0; y < height; y++) {
for (x = -3; x < width+5; x++)
dstv[x] = av_clip_uint8(FILTER(src+x, stride));
for (x = 0; x < width; x++)
dstc[x] = av_clip_uint8(FILTER(dstv+x, 1));
for (x = 0; x < width; x++)
dsth[x] = av_clip_uint8(FILTER(src+x, 1));
src += stride;
dsth += stride;
dstv += stride;
dstc += stride;
}
}
#define PIXOP_BILINEAR(PFX, OP, WIDTH) \
static void ff_ ## PFX ## _dirac_pixels ## WIDTH ## _bilinear_c(uint8_t *dst, const uint8_t *src[5], int stride, int h) \
{ \
int x; \
const uint8_t *s0 = src[0]; \
const uint8_t *s1 = src[1]; \
const uint8_t *s2 = src[2]; \
const uint8_t *s3 = src[3]; \
const uint8_t *w = src[4]; \
\
while (h--) { \
for (x = 0; x < WIDTH; x++) { \
OP(dst[x], (s0[x]*w[0] + s1[x]*w[1] + s2[x]*w[2] + s3[x]*w[3] + 8) >> 4); \
} \
\
dst += stride; \
s0 += stride; \
s1 += stride; \
s2 += stride; \
s3 += stride; \
} \
}
#define OP_PUT(dst, val) (dst) = (val)
#define OP_AVG(dst, val) (dst) = (((dst) + (val) + 1)>>1)
PIXOP_BILINEAR(put, OP_PUT, 8)
PIXOP_BILINEAR(put, OP_PUT, 16)
PIXOP_BILINEAR(put, OP_PUT, 32)
PIXOP_BILINEAR(avg, OP_AVG, 8)
PIXOP_BILINEAR(avg, OP_AVG, 16)
PIXOP_BILINEAR(avg, OP_AVG, 32)
#define op_scale1(x) block[x] = av_clip_uint8( (block[x]*weight + (1<<(log2_denom-1))) >> log2_denom)
#define op_scale2(x) dst[x] = av_clip_uint8( (src[x]*weights + dst[x]*weightd + (1<<(log2_denom-1))) >> log2_denom)
#define DIRAC_WEIGHT(W) \
static void weight_dirac_pixels ## W ## _c(uint8_t *block, int stride, int log2_denom, \
int weight, int h) { \
int x; \
while (h--) { \
for (x = 0; x < W; x++) { \
op_scale1(x); \
op_scale1(x+1); \
} \
block += stride; \
} \
} \
static void biweight_dirac_pixels ## W ## _c(uint8_t *dst, const uint8_t *src, int stride, int log2_denom, \
int weightd, int weights, int h) { \
int x; \
while (h--) { \
for (x = 0; x < W; x++) { \
op_scale2(x); \
op_scale2(x+1); \
} \
dst += stride; \
src += stride; \
} \
}
DIRAC_WEIGHT(8)
DIRAC_WEIGHT(16)
DIRAC_WEIGHT(32)
#define ADD_OBMC(xblen) \
static void add_obmc ## xblen ## _c(uint16_t *dst, const uint8_t *src, int stride, \
const uint8_t *obmc_weight, int yblen) \
{ \
int x; \
while (yblen--) { \
for (x = 0; x < xblen; x += 2) { \
dst[x ] += src[x ] * obmc_weight[x ]; \
dst[x+1] += src[x+1] * obmc_weight[x+1]; \
} \
dst += stride; \
src += stride; \
obmc_weight += 32; \
} \
}
ADD_OBMC(8)
ADD_OBMC(16)
ADD_OBMC(32)
static void put_signed_rect_clamped_8bit_c(uint8_t *dst, int dst_stride, const uint8_t *_src, int src_stride, int width, int height)
{
int x, y;
int16_t *src = (int16_t *)_src;
for (y = 0; y < height; y++) {
for (x = 0; x < width; x+=4) {
dst[x ] = av_clip_uint8(src[x ] + 128);
dst[x+1] = av_clip_uint8(src[x+1] + 128);
dst[x+2] = av_clip_uint8(src[x+2] + 128);
dst[x+3] = av_clip_uint8(src[x+3] + 128);
}
dst += dst_stride;
src += src_stride >> 1;
}
}
#define PUT_SIGNED_RECT_CLAMPED(PX) \
static void put_signed_rect_clamped_ ## PX ## bit_c(uint8_t *_dst, int dst_stride, const uint8_t *_src, \
int src_stride, int width, int height) \
{ \
int x, y; \
uint16_t *dst = (uint16_t *)_dst; \
int32_t *src = (int32_t *)_src; \
for (y = 0; y < height; y++) { \
for (x = 0; x < width; x+=4) { \
dst[x ] = av_clip_uintp2(src[x ] + (1 << (PX - 1)), PX); \
dst[x+1] = av_clip_uintp2(src[x+1] + (1 << (PX - 1)), PX); \
dst[x+2] = av_clip_uintp2(src[x+2] + (1 << (PX - 1)), PX); \
dst[x+3] = av_clip_uintp2(src[x+3] + (1 << (PX - 1)), PX); \
} \
dst += dst_stride >> 1; \
src += src_stride >> 2; \
} \
}
PUT_SIGNED_RECT_CLAMPED(10)
PUT_SIGNED_RECT_CLAMPED(12)
static void add_rect_clamped_c(uint8_t *dst, const uint16_t *src, int stride,
const int16_t *idwt, int idwt_stride,
int width, int height)
{
int x, y;
for (y = 0; y < height; y++) {
for (x = 0; x < width; x+=2) {
dst[x ] = av_clip_uint8(((src[x ]+32)>>6) + idwt[x ]);
dst[x+1] = av_clip_uint8(((src[x+1]+32)>>6) + idwt[x+1]);
}
dst += stride;
src += stride;
idwt += idwt_stride;
}
}
#define DEQUANT_SUBBAND(PX) \
static void dequant_subband_ ## PX ## _c(uint8_t *src, uint8_t *dst, ptrdiff_t stride, \
const int qf, const int qs, int tot_v, int tot_h) \
{ \
int i, y; \
for (y = 0; y < tot_v; y++) { \
PX c, sign, *src_r = (PX *)src, *dst_r = (PX *)dst; \
for (i = 0; i < tot_h; i++) { \
c = *src_r++; \
sign = FFSIGN(c)*(!!c); \
c = (FFABS(c)*(unsigned)qf + qs) >> 2; \
*dst_r++ = c*sign; \
} \
src += tot_h << (sizeof(PX) >> 1); \
dst += stride; \
} \
}
DEQUANT_SUBBAND(int16_t)
DEQUANT_SUBBAND(int32_t)
#define PIXFUNC(PFX, WIDTH) \
c->PFX ## _dirac_pixels_tab[WIDTH>>4][0] = ff_ ## PFX ## _dirac_pixels ## WIDTH ## _c; \
c->PFX ## _dirac_pixels_tab[WIDTH>>4][1] = ff_ ## PFX ## _dirac_pixels ## WIDTH ## _l2_c; \
c->PFX ## _dirac_pixels_tab[WIDTH>>4][2] = ff_ ## PFX ## _dirac_pixels ## WIDTH ## _l4_c; \
c->PFX ## _dirac_pixels_tab[WIDTH>>4][3] = ff_ ## PFX ## _dirac_pixels ## WIDTH ## _bilinear_c
av_cold void ff_diracdsp_init(DiracDSPContext *c)
{
c->dirac_hpel_filter = dirac_hpel_filter;
c->add_rect_clamped = add_rect_clamped_c;
c->put_signed_rect_clamped[0] = put_signed_rect_clamped_8bit_c;
c->put_signed_rect_clamped[1] = put_signed_rect_clamped_10bit_c;
c->put_signed_rect_clamped[2] = put_signed_rect_clamped_12bit_c;
c->add_dirac_obmc[0] = add_obmc8_c;
c->add_dirac_obmc[1] = add_obmc16_c;
c->add_dirac_obmc[2] = add_obmc32_c;
c->weight_dirac_pixels_tab[0] = weight_dirac_pixels8_c;
c->weight_dirac_pixels_tab[1] = weight_dirac_pixels16_c;
c->weight_dirac_pixels_tab[2] = weight_dirac_pixels32_c;
c->biweight_dirac_pixels_tab[0] = biweight_dirac_pixels8_c;
c->biweight_dirac_pixels_tab[1] = biweight_dirac_pixels16_c;
c->biweight_dirac_pixels_tab[2] = biweight_dirac_pixels32_c;
c->dequant_subband[0] = c->dequant_subband[2] = dequant_subband_int16_t_c;
c->dequant_subband[1] = c->dequant_subband[3] = dequant_subband_int32_t_c;
PIXFUNC(put, 8);
PIXFUNC(put, 16);
PIXFUNC(put, 32);
PIXFUNC(avg, 8);
PIXFUNC(avg, 16);
PIXFUNC(avg, 32);
if (ARCH_X86)
ff_diracdsp_init_x86(c);
}