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FreeRDP/libfreerdp-rfx/sse2/rfx_sse2.c

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/**
* FreeRDP: A Remote Desktop Protocol client.
* RemoteFX Codec Library - SSE2 Optimizations
*
* Copyright 2011 Stephen Erisman
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <xmmintrin.h>
#include <emmintrin.h>
#include "rfx_types.h"
#include "rfx_sse2.h"
#define CACHE_LINE_BYTES 64
#define _mm_between_epi16(_val, _min, _max) \
do { _val = _mm_min_epi16(_max, _mm_max_epi16(_val, _min)); } while (0)
static __inline void __attribute__((__gnu_inline__, __always_inline__, __artificial__))
_mm_prefetch_buffer(char * buffer, int num_bytes)
{
__m128i * buf = (__m128i*) buffer;
int i;
for (i = 0; i < (num_bytes / sizeof(__m128i)); i+=(CACHE_LINE_BYTES / sizeof(__m128i)))
{
_mm_prefetch((char*)(&buf[i]), _MM_HINT_NTA);
}
}
static void rfx_decode_ycbcr_to_rgb_sse2(sint16* y_r_buffer, sint16* cb_g_buffer, sint16* cr_b_buffer)
{
__m128i zero = _mm_setzero_si128();
__m128i max = _mm_set1_epi16(255);
__m128i* y_r_buf = (__m128i*) y_r_buffer;
__m128i* cb_g_buf = (__m128i*) cb_g_buffer;
__m128i* cr_b_buf = (__m128i*) cr_b_buffer;
__m128i y;
__m128i cr;
__m128i cb;
__m128i r;
__m128i g;
__m128i b;
int i;
for (i = 0; i < (4096 * sizeof(sint16) / sizeof(__m128i)); i += (CACHE_LINE_BYTES / sizeof(__m128i)))
{
_mm_prefetch((char*)(&y_r_buf[i]), _MM_HINT_NTA);
_mm_prefetch((char*)(&cb_g_buf[i]), _MM_HINT_NTA);
_mm_prefetch((char*)(&cr_b_buf[i]), _MM_HINT_NTA);
}
for (i = 0; i < (4096 * sizeof(sint16) / sizeof(__m128i)); i++)
{
/* y = (y_r_buf[i] >> 5) + 128; */
y = _mm_load_si128(&y_r_buf[i]);
y = _mm_add_epi16(_mm_srai_epi16(y, 5), _mm_set1_epi16(128));
/* cr = cr_b_buf[i]; */
cr = _mm_load_si128(&cr_b_buf[i]);
/* r = y + ((cr >> 5) + (cr >> 7) + (cr >> 8) + (cr >> 11) + (cr >> 12) + (cr >> 13)); */
/* y_r_buf[i] = MINMAX(r, 0, 255); */
r = _mm_add_epi16(y, _mm_srai_epi16(cr, 5));
r = _mm_add_epi16(r, _mm_srai_epi16(cr, 7));
r = _mm_add_epi16(r, _mm_srai_epi16(cr, 8));
r = _mm_add_epi16(r, _mm_srai_epi16(cr, 11));
r = _mm_add_epi16(r, _mm_srai_epi16(cr, 12));
r = _mm_add_epi16(r, _mm_srai_epi16(cr, 13));
_mm_between_epi16(r, zero, max);
_mm_store_si128(&y_r_buf[i], r);
/* cb = cb_g_buf[i]; */
cb = _mm_load_si128(&cb_g_buf[i]);
/* g = y - ((cb >> 7) + (cb >> 9) + (cb >> 10)) -
((cr >> 6) + (cr >> 8) + (cr >> 9) + (cr >> 11) + (cr >> 12) + (cr >> 13)); */
/* cb_g_buf[i] = MINMAX(g, 0, 255); */
g = _mm_sub_epi16(y, _mm_srai_epi16(cb, 7));
g = _mm_sub_epi16(g, _mm_srai_epi16(cb, 9));
g = _mm_sub_epi16(g, _mm_srai_epi16(cb, 10));
g = _mm_sub_epi16(g, _mm_srai_epi16(cr, 6));
g = _mm_sub_epi16(g, _mm_srai_epi16(cr, 8));
g = _mm_sub_epi16(g, _mm_srai_epi16(cr, 9));
g = _mm_sub_epi16(g, _mm_srai_epi16(cr, 11));
g = _mm_sub_epi16(g, _mm_srai_epi16(cr, 12));
g = _mm_sub_epi16(g, _mm_srai_epi16(cr, 13));
_mm_between_epi16(g, zero, max);
_mm_store_si128(&cb_g_buf[i], g);
/* b = y + ((cb >> 5) + (cb >> 6) + (cb >> 7) + (cb >> 11) + (cb >> 13)); */
/* cr_b_buf[i] = MINMAX(b, 0, 255); */
b = _mm_add_epi16(y, _mm_srai_epi16(cb, 5));
b = _mm_add_epi16(b, _mm_srai_epi16(cb, 6));
b = _mm_add_epi16(b, _mm_srai_epi16(cb, 7));
b = _mm_add_epi16(b, _mm_srai_epi16(cb, 11));
b = _mm_add_epi16(b, _mm_srai_epi16(cb, 13));
_mm_between_epi16(b, zero, max);
_mm_store_si128(&cr_b_buf[i], b);
}
}
/* The encodec YCbCr coeffectients are represented as 11.5 fixed-point numbers. See rfx_encode.c */
static void rfx_encode_rgb_to_ycbcr_sse2(sint16* y_r_buffer, sint16* cb_g_buffer, sint16* cr_b_buffer)
{
__m128i min = _mm_set1_epi16(-128 << 5);
__m128i max = _mm_set1_epi16(127 << 5);
__m128i* y_r_buf = (__m128i*) y_r_buffer;
__m128i* cb_g_buf = (__m128i*) cb_g_buffer;
__m128i* cr_b_buf = (__m128i*) cr_b_buffer;
__m128i y;
__m128i cr;
__m128i cb;
__m128i r;
__m128i g;
__m128i b;
int i;
for (i = 0; i < (4096 * sizeof(sint16) / sizeof(__m128i)); i += (CACHE_LINE_BYTES / sizeof(__m128i)))
{
_mm_prefetch((char*)(&y_r_buf[i]), _MM_HINT_NTA);
_mm_prefetch((char*)(&cb_g_buf[i]), _MM_HINT_NTA);
_mm_prefetch((char*)(&cr_b_buf[i]), _MM_HINT_NTA);
}
for (i = 0; i < (4096 * sizeof(sint16) / sizeof(__m128i)); i++)
{
/* r = y_r_buf[i]; */
r = _mm_load_si128(&y_r_buf[i]);
/* g = cb_g_buf[i]; */
g = _mm_load_si128(&cb_g_buf[i]);
/* b = cr_b_buf[i]; */
b = _mm_load_si128(&cr_b_buf[i]);
/* y = ((r << 3) + (r) + (r >> 1) + (r >> 4) + (r >> 7)) +
((g << 4) + (g << 1) + (g >> 1) + (g >> 2) + (g >> 5)) +
((b << 1) + (b) + (b >> 1) + (b >> 3) + (b >> 6) + (b >> 7)); */
/* y_r_buf[i] = MINMAX(y, 0, (255 << 5)) - (128 << 5); */
y = _mm_add_epi16(_mm_slli_epi16(r, 3), r);
y = _mm_add_epi16(y, _mm_srai_epi16(r, 1));
y = _mm_add_epi16(y, _mm_srai_epi16(r, 4));
y = _mm_add_epi16(y, _mm_srai_epi16(r, 7));
y = _mm_add_epi16(y, _mm_slli_epi16(g, 4));
y = _mm_add_epi16(y, _mm_slli_epi16(g, 1));
y = _mm_add_epi16(y, _mm_srai_epi16(g, 1));
y = _mm_add_epi16(y, _mm_srai_epi16(g, 2));
y = _mm_add_epi16(y, _mm_srai_epi16(g, 5));
y = _mm_add_epi16(y, _mm_slli_epi16(b, 1));
y = _mm_add_epi16(y, b);
y = _mm_add_epi16(y, _mm_srai_epi16(b, 1));
y = _mm_add_epi16(y, _mm_srai_epi16(b, 3));
y = _mm_add_epi16(y, _mm_srai_epi16(b, 6));
y = _mm_add_epi16(y, _mm_srai_epi16(b, 7));
y = _mm_add_epi16(y, min);
_mm_between_epi16(y, min, max);
_mm_store_si128(&y_r_buf[i], y);
/* cb = 0 - ((r << 2) + (r) + (r >> 2) + (r >> 3) + (r >> 5)) -
((g << 3) + (g << 1) + (g >> 1) + (g >> 4) + (g >> 5) + (g >> 6)) +
((b << 4) + (b >> 6)); */
/* cb_g_buf[i] = MINMAX(cb, (-128 << 5), (127 << 5)); */
cb = _mm_add_epi16(_mm_slli_epi16(b, 4), _mm_srai_epi16(b, 6));
cb = _mm_sub_epi16(cb, _mm_slli_epi16(r, 2));
cb = _mm_sub_epi16(cb, r);
cb = _mm_sub_epi16(cb, _mm_srai_epi16(r, 2));
cb = _mm_sub_epi16(cb, _mm_srai_epi16(r, 3));
cb = _mm_sub_epi16(cb, _mm_srai_epi16(r, 5));
cb = _mm_sub_epi16(cb, _mm_slli_epi16(g, 3));
cb = _mm_sub_epi16(cb, _mm_slli_epi16(g, 1));
cb = _mm_sub_epi16(cb, _mm_srai_epi16(g, 1));
cb = _mm_sub_epi16(cb, _mm_srai_epi16(g, 4));
cb = _mm_sub_epi16(cb, _mm_srai_epi16(g, 5));
cb = _mm_sub_epi16(cb, _mm_srai_epi16(g, 6));
_mm_between_epi16(cb, min, max);
_mm_store_si128(&cb_g_buf[i], cb);
/* cr = ((r << 4) - (r >> 7)) -
((g << 3) + (g << 2) + (g) + (g >> 2) + (g >> 3) + (g >> 6)) -
((b << 1) + (b >> 1) + (b >> 4) + (b >> 5) + (b >> 7)); */
/* cr_b_buf[i] = MINMAX(cr, (-128 << 5), (127 << 5)); */
cr = _mm_sub_epi16(_mm_slli_epi16(r, 4), _mm_srai_epi16(r, 7));
cr = _mm_sub_epi16(cr, _mm_slli_epi16(g, 3));
cr = _mm_sub_epi16(cr, _mm_slli_epi16(g, 2));
cr = _mm_sub_epi16(cr, g);
cr = _mm_sub_epi16(cr, _mm_srai_epi16(g, 2));
cr = _mm_sub_epi16(cr, _mm_srai_epi16(g, 3));
cr = _mm_sub_epi16(cr, _mm_srai_epi16(g, 6));
cr = _mm_sub_epi16(cr, _mm_slli_epi16(b, 1));
cr = _mm_sub_epi16(cr, _mm_srai_epi16(b, 1));
cr = _mm_sub_epi16(cr, _mm_srai_epi16(b, 4));
cr = _mm_sub_epi16(cr, _mm_srai_epi16(b, 5));
cr = _mm_sub_epi16(cr, _mm_srai_epi16(b, 7));
_mm_between_epi16(cr, min, max);
_mm_store_si128(&cr_b_buf[i], cr);
}
}
static __inline void __attribute__((__gnu_inline__, __always_inline__, __artificial__))
rfx_quantization_decode_block_sse2(sint16* buffer, const int buffer_size, const uint32 factor)
{
int shift = factor-6;
if (shift <= 0)
return;
__m128i a;
__m128i * ptr = (__m128i*) buffer;
__m128i * buf_end = (__m128i*) (buffer + buffer_size);
do
{
a = _mm_load_si128(ptr);
a = _mm_slli_epi16(a, shift);
_mm_store_si128(ptr, a);
ptr++;
} while(ptr < buf_end);
}
static void rfx_quantization_decode_sse2(sint16* buffer, const uint32* quantization_values)
{
_mm_prefetch_buffer((char*) buffer, 4096 * sizeof(sint16));
rfx_quantization_decode_block_sse2(buffer, 1024, quantization_values[8]); /* HL1 */
rfx_quantization_decode_block_sse2(buffer + 1024, 1024, quantization_values[7]); /* LH1 */
rfx_quantization_decode_block_sse2(buffer + 2048, 1024, quantization_values[9]); /* HH1 */
rfx_quantization_decode_block_sse2(buffer + 3072, 256, quantization_values[5]); /* HL2 */
rfx_quantization_decode_block_sse2(buffer + 3328, 256, quantization_values[4]); /* LH2 */
rfx_quantization_decode_block_sse2(buffer + 3584, 256, quantization_values[6]); /* HH2 */
rfx_quantization_decode_block_sse2(buffer + 3840, 64, quantization_values[2]); /* HL3 */
rfx_quantization_decode_block_sse2(buffer + 3904, 64, quantization_values[1]); /* LH3 */
rfx_quantization_decode_block_sse2(buffer + 3868, 64, quantization_values[3]); /* HH3 */
rfx_quantization_decode_block_sse2(buffer + 4032, 64, quantization_values[0]); /* LL3 */
}
static __inline void __attribute__((__gnu_inline__, __always_inline__, __artificial__))
rfx_quantization_encode_block_sse2(sint16* buffer, const int buffer_size, const uint32 factor)
{
int shift = factor-6;
if (shift <= 0)
return;
__m128i a;
__m128i* ptr = (__m128i*) buffer;
__m128i* buf_end = (__m128i*) (buffer + buffer_size);
do
{
a = _mm_load_si128(ptr);
a = _mm_srai_epi16(a, shift);
_mm_store_si128(ptr, a);
ptr++;
} while(ptr < buf_end);
}
static void rfx_quantization_encode_sse2(sint16* buffer, const uint32* quantization_values)
{
_mm_prefetch_buffer((char*) buffer, 4096 * sizeof(sint16));
rfx_quantization_encode_block_sse2(buffer, 1024, quantization_values[8]); /* HL1 */
rfx_quantization_encode_block_sse2(buffer + 1024, 1024, quantization_values[7]); /* LH1 */
rfx_quantization_encode_block_sse2(buffer + 2048, 1024, quantization_values[9]); /* HH1 */
rfx_quantization_encode_block_sse2(buffer + 3072, 256, quantization_values[5]); /* HL2 */
rfx_quantization_encode_block_sse2(buffer + 3328, 256, quantization_values[4]); /* LH2 */
rfx_quantization_encode_block_sse2(buffer + 3584, 256, quantization_values[6]); /* HH2 */
rfx_quantization_encode_block_sse2(buffer + 3840, 64, quantization_values[2]); /* HL3 */
rfx_quantization_encode_block_sse2(buffer + 3904, 64, quantization_values[1]); /* LH3 */
rfx_quantization_encode_block_sse2(buffer + 3868, 64, quantization_values[3]); /* HH3 */
rfx_quantization_encode_block_sse2(buffer + 4032, 64, quantization_values[0]); /* LL3 */
}
static __inline void __attribute__((__gnu_inline__, __always_inline__, __artificial__))
rfx_dwt_2d_decode_block_horiz_sse2(sint16* l, sint16* h, sint16* dst, int subband_width)
{
int y, n;
sint16* l_ptr = l;
sint16* h_ptr = h;
sint16* dst_ptr = dst;
int first;
int last;
__m128i l_n;
__m128i h_n;
__m128i h_n_m;
__m128i tmp_n;
__m128i dst_n;
__m128i dst_n_p;
__m128i dst1;
__m128i dst2;
for (y = 0; y < subband_width; y++)
{
/* Even coefficients */
for (n = 0; n < subband_width; n+=8)
{
/* dst[2n] = l[n] - ((h[n-1] + h[n] + 1) >> 1); */
l_n = _mm_load_si128((__m128i*) l_ptr);
h_n = _mm_load_si128((__m128i*) h_ptr);
h_n_m = _mm_loadu_si128((__m128i*) (h_ptr - 1));
if (n == 0)
{
first = _mm_extract_epi16(h_n_m, 1);
h_n_m = _mm_insert_epi16(h_n_m, first, 0);
}
tmp_n = _mm_add_epi16(h_n, h_n_m);
tmp_n = _mm_add_epi16(tmp_n, _mm_set1_epi16(1));
tmp_n = _mm_srai_epi16(tmp_n, 1);
dst_n = _mm_sub_epi16(l_n, tmp_n);
_mm_store_si128((__m128i*) l_ptr, dst_n);
l_ptr+=8;
h_ptr+=8;
}
l_ptr -= subband_width;
h_ptr -= subband_width;
/* Odd coefficients */
for (n = 0; n < subband_width; n+=8)
{
/* dst[2n + 1] = (h[n] << 1) + ((dst[2n] + dst[2n + 2]) >> 1); */
h_n = _mm_load_si128((__m128i*) h_ptr);
h_n = _mm_slli_epi16(h_n, 1);
dst_n = _mm_load_si128((__m128i*) (l_ptr));
dst_n_p = _mm_loadu_si128((__m128i*) (l_ptr + 1));
if (n == subband_width - 8)
{
last = _mm_extract_epi16(dst_n_p, 6);
dst_n_p = _mm_insert_epi16(dst_n_p, last, 7);
}
tmp_n = _mm_add_epi16(dst_n_p, dst_n);
tmp_n = _mm_srai_epi16(tmp_n, 1);
tmp_n = _mm_add_epi16(tmp_n, h_n);
dst1 = _mm_unpacklo_epi16(dst_n, tmp_n);
dst2 = _mm_unpackhi_epi16(dst_n, tmp_n);
_mm_store_si128((__m128i*) dst_ptr, dst1);
_mm_store_si128((__m128i*) (dst_ptr + 8), dst2);
l_ptr+=8;
h_ptr+=8;
dst_ptr+=16;
}
}
}
static __inline void __attribute__((__gnu_inline__, __always_inline__, __artificial__))
rfx_dwt_2d_decode_block_vert_sse2(sint16* l, sint16* h, sint16* dst, int subband_width)
{
int x, n;
sint16* l_ptr = l;
sint16* h_ptr = h;
sint16* dst_ptr = dst;
__m128i l_n;
__m128i h_n;
__m128i tmp_n;
__m128i h_n_m;
__m128i dst_n;
__m128i dst_n_m;
__m128i dst_n_p;
int total_width = subband_width + subband_width;
/* Even coefficients */
for (n = 0; n < subband_width; n++)
{
for (x = 0; x < total_width; x+=8)
{
/* dst[2n] = l[n] - ((h[n-1] + h[n] + 1) >> 1); */
l_n = _mm_load_si128((__m128i*) l_ptr);
h_n = _mm_load_si128((__m128i*) h_ptr);
tmp_n = _mm_add_epi16(h_n, _mm_set1_epi16(1));;
if (n == 0)
tmp_n = _mm_add_epi16(tmp_n, h_n);
else
{
h_n_m = _mm_loadu_si128((__m128i*) (h_ptr - total_width));
tmp_n = _mm_add_epi16(tmp_n, h_n_m);
}
tmp_n = _mm_srai_epi16(tmp_n, 1);
dst_n = _mm_sub_epi16(l_n, tmp_n);
_mm_store_si128((__m128i*) dst_ptr, dst_n);
l_ptr+=8;
h_ptr+=8;
dst_ptr+=8;
}
dst_ptr+=total_width;
}
h_ptr = h;
dst_ptr = dst + total_width;
/* Odd coefficients */
for (n = 0; n < subband_width; n++)
{
for (x = 0; x < total_width; x+=8)
{
/* dst[2n + 1] = (h[n] << 1) + ((dst[2n] + dst[2n + 2]) >> 1); */
h_n = _mm_load_si128((__m128i*) h_ptr);
dst_n_m = _mm_load_si128((__m128i*) (dst_ptr - total_width));
h_n = _mm_slli_epi16(h_n, 1);
tmp_n = dst_n_m;
if (n == subband_width - 1)
tmp_n = _mm_add_epi16(tmp_n, dst_n_m);
else
{
dst_n_p = _mm_loadu_si128((__m128i*) (dst_ptr + total_width));
tmp_n = _mm_add_epi16(tmp_n, dst_n_p);
}
tmp_n = _mm_srai_epi16(tmp_n, 1);
dst_n = _mm_add_epi16(tmp_n, h_n);
_mm_store_si128((__m128i*) dst_ptr, dst_n);
h_ptr+=8;
dst_ptr+=8;
}
dst_ptr+=total_width;
}
}
static __inline void __attribute__((__gnu_inline__, __always_inline__, __artificial__))
rfx_dwt_2d_decode_block_sse2(sint16* buffer, sint16* idwt, int subband_width)
{
sint16 *hl, *lh, *hh, *ll;
sint16 *l_dst, *h_dst;
_mm_prefetch_buffer((char*) idwt, subband_width * 4 * sizeof(sint16));
/* Inverse DWT in horizontal direction, results in 2 sub-bands in L, H order in tmp buffer idwt. */
/* The 4 sub-bands are stored in HL(0), LH(1), HH(2), LL(3) order. */
/* The lower part L uses LL(3) and HL(0). */
/* The higher part H uses LH(1) and HH(2). */
ll = buffer + subband_width * subband_width * 3;
hl = buffer;
l_dst = idwt;
rfx_dwt_2d_decode_block_horiz_sse2(ll, hl, l_dst, subband_width);
lh = buffer + subband_width * subband_width;
hh = buffer + subband_width * subband_width * 2;
h_dst = idwt + subband_width * subband_width * 2;
rfx_dwt_2d_decode_block_horiz_sse2(lh, hh, h_dst, subband_width);
/* Inverse DWT in vertical direction, results are stored in original buffer. */
rfx_dwt_2d_decode_block_vert_sse2(l_dst, h_dst, buffer, subband_width);
}
static void rfx_dwt_2d_decode_sse2(sint16* buffer, sint16* dwt_buffer)
{
_mm_prefetch_buffer((char*) buffer, 4096 * sizeof(sint16));
rfx_dwt_2d_decode_block_sse2(buffer + 3840, dwt_buffer, 8);
rfx_dwt_2d_decode_block_sse2(buffer + 3072, dwt_buffer, 16);
rfx_dwt_2d_decode_block_sse2(buffer, dwt_buffer, 32);
}
static __inline void __attribute__((__gnu_inline__, __always_inline__, __artificial__))
rfx_dwt_2d_encode_block_vert_sse2(sint16* src, sint16* l, sint16* h, int subband_width)
{
int total_width;
int x;
int n;
__m128i src_2n;
__m128i src_2n_1;
__m128i src_2n_2;
__m128i h_n;
__m128i h_n_m;
__m128i l_n;
total_width = subband_width << 1;
for (n = 0; n < subband_width; n++)
{
for (x = 0; x < total_width; x += 8)
{
src_2n = _mm_load_si128((__m128i*) src);
src_2n_1 = _mm_load_si128((__m128i*) (src + total_width));
if (n < subband_width - 1)
src_2n_2 = _mm_load_si128((__m128i*) (src + 2 * total_width));
else
src_2n_2 = src_2n_1;
/* h[n] = (src[2n + 1] - ((src[2n] + src[2n + 2]) >> 1)) >> 1 */
h_n = _mm_add_epi16(src_2n, src_2n_2);
h_n = _mm_srai_epi16(h_n, 1);
h_n = _mm_sub_epi16(src_2n_1, h_n);
h_n = _mm_srai_epi16(h_n, 1);
_mm_store_si128((__m128i*) h, h_n);
if (n == 0)
h_n_m = h_n;
else
h_n_m = _mm_load_si128((__m128i*) (h - total_width));
/* l[n] = src[2n] + ((h[n - 1] + h[n]) >> 1) */
l_n = _mm_add_epi16(h_n_m, h_n);
l_n = _mm_srai_epi16(l_n, 1);
l_n = _mm_add_epi16(l_n, src_2n);
_mm_store_si128((__m128i*) l, l_n);
src += 8;
l += 8;
h += 8;
}
src += total_width;
}
}
static __inline void __attribute__((__gnu_inline__, __always_inline__, __artificial__))
rfx_dwt_2d_encode_block_horiz_sse2(sint16* src, sint16* l, sint16* h, int subband_width)
{
int y;
int n;
int first;
__m128i src_2n;
__m128i src_2n_1;
__m128i src_2n_2;
__m128i h_n;
__m128i h_n_m;
__m128i l_n;
for (y = 0; y < subband_width; y++)
{
for (n = 0; n < subband_width; n += 8)
{
/* The following 3 Set operations consumes more than half of the total DWT processing time! */
src_2n = _mm_set_epi16(src[14], src[12], src[10], src[8], src[6], src[4], src[2], src[0]);
src_2n_1 = _mm_set_epi16(src[15], src[13], src[11], src[9], src[7], src[5], src[3], src[1]);
src_2n_2 = _mm_set_epi16(n == subband_width - 8 ? src[15] : src[16],
src[14], src[12], src[10], src[8], src[6], src[4], src[2]);
/* h[n] = (src[2n + 1] - ((src[2n] + src[2n + 2]) >> 1)) >> 1 */
h_n = _mm_add_epi16(src_2n, src_2n_2);
h_n = _mm_srai_epi16(h_n, 1);
h_n = _mm_sub_epi16(src_2n_1, h_n);
h_n = _mm_srai_epi16(h_n, 1);
_mm_store_si128((__m128i*) h, h_n);
h_n_m = _mm_loadu_si128((__m128i*) (h - 1));
if (n == 0)
{
first = _mm_extract_epi16(h_n_m, 1);
h_n_m = _mm_insert_epi16(h_n_m, first, 0);
}
/* l[n] = src[2n] + ((h[n - 1] + h[n]) >> 1) */
l_n = _mm_add_epi16(h_n_m, h_n);
l_n = _mm_srai_epi16(l_n, 1);
l_n = _mm_add_epi16(l_n, src_2n);
_mm_store_si128((__m128i*) l, l_n);
src += 16;
l += 8;
h += 8;
}
}
}
static __inline void __attribute__((__gnu_inline__, __always_inline__, __artificial__))
rfx_dwt_2d_encode_block_sse2(sint16* buffer, sint16* dwt, int subband_width)
{
sint16 *hl, *lh, *hh, *ll;
sint16 *l_src, *h_src;
_mm_prefetch_buffer((char*) dwt, subband_width * 4 * sizeof(sint16));
/* DWT in vertical direction, results in 2 sub-bands in L, H order in tmp buffer dwt. */
l_src = dwt;
h_src = dwt + subband_width * subband_width * 2;
rfx_dwt_2d_encode_block_vert_sse2(buffer, l_src, h_src, subband_width);
/* DWT in horizontal direction, results in 4 sub-bands in HL(0), LH(1), HH(2), LL(3) order, stored in original buffer. */
/* The lower part L generates LL(3) and HL(0). */
/* The higher part H generates LH(1) and HH(2). */
ll = buffer + subband_width * subband_width * 3;
hl = buffer;
lh = buffer + subband_width * subband_width;
hh = buffer + subband_width * subband_width * 2;
rfx_dwt_2d_encode_block_horiz_sse2(l_src, ll, hl, subband_width);
rfx_dwt_2d_encode_block_horiz_sse2(h_src, lh, hh, subband_width);
}
static void rfx_dwt_2d_encode_sse2(sint16* buffer, sint16* dwt_buffer)
{
_mm_prefetch_buffer((char*) buffer, 4096 * sizeof(sint16));
rfx_dwt_2d_encode_block_sse2(buffer, dwt_buffer, 32);
rfx_dwt_2d_encode_block_sse2(buffer + 3072, dwt_buffer, 16);
rfx_dwt_2d_encode_block_sse2(buffer + 3840, dwt_buffer, 8);
}
void rfx_init_sse2(RFX_CONTEXT* context)
{
DEBUG_RFX("Using SSE2 optimizations");
IF_PROFILER(context->priv->prof_rfx_decode_ycbcr_to_rgb->name = "rfx_decode_ycbcr_to_rgb_sse2");
IF_PROFILER(context->priv->prof_rfx_encode_rgb_to_ycbcr->name = "rfx_encode_rgb_to_ycbcr_sse2");
IF_PROFILER(context->priv->prof_rfx_quantization_decode->name = "rfx_quantization_decode_sse2");
IF_PROFILER(context->priv->prof_rfx_quantization_encode->name = "rfx_quantization_encode_sse2");
IF_PROFILER(context->priv->prof_rfx_dwt_2d_decode->name = "rfx_dwt_2d_decode_sse2");
IF_PROFILER(context->priv->prof_rfx_dwt_2d_encode->name = "rfx_dwt_2d_encode_sse2");
context->decode_ycbcr_to_rgb = rfx_decode_ycbcr_to_rgb_sse2;
context->encode_rgb_to_ycbcr = rfx_encode_rgb_to_ycbcr_sse2;
context->quantization_decode = rfx_quantization_decode_sse2;
context->quantization_encode = rfx_quantization_encode_sse2;
context->dwt_2d_decode = rfx_dwt_2d_decode_sse2;
context->dwt_2d_encode = rfx_dwt_2d_encode_sse2;
}
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