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obs-studio/libobs/media-io/format-conversion.c

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/******************************************************************************
Copyright (C) 2013 by Hugh Bailey <obs.jim@gmail.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/
#include "format-conversion.h"
#include <xmmintrin.h>
#include <emmintrin.h>
/* ...surprisingly, if I don't use a macro to force inlining, it causes the
* CPU usage to boost by a tremendous amount in debug builds. */
#define get_m128_32_0(val) (*((uint32_t*)&val))
#define get_m128_32_1(val) (*(((uint32_t*)&val)+1))
#define pack_lum(lum_plane, lum_pos0, lum_pos1, line1, line2, lum_mask) \
do { \
__m128i pack_val = _mm_packs_epi32( \
_mm_srli_si128(_mm_and_si128(line1, lum_mask), 1), \
_mm_srli_si128(_mm_and_si128(line2, lum_mask), 1)); \
pack_val = _mm_packus_epi16(pack_val, pack_val); \
\
*(uint32_t*)(lum_plane+lum_pos0) = get_m128_32_0(pack_val); \
*(uint32_t*)(lum_plane+lum_pos1) = get_m128_32_1(pack_val); \
} while (false)
#define pack_ch_1plane(uv_plane, chroma_pos, line1, line2, uv_mask) \
do { \
__m128i add_val = _mm_add_epi64( \
_mm_and_si128(line1, uv_mask), \
_mm_and_si128(line2, uv_mask)); \
__m128i avg_val = _mm_add_epi64( \
add_val, \
_mm_shuffle_epi32(add_val, _MM_SHUFFLE(2, 3, 0, 1))); \
avg_val = _mm_srai_epi16(avg_val, 2); \
avg_val = _mm_shuffle_epi32(avg_val, _MM_SHUFFLE(3, 1, 2, 0)); \
avg_val = _mm_packus_epi16(avg_val, avg_val); \
\
*(uint32_t*)(uv_plane+chroma_pos) = get_m128_32_0(avg_val); \
} while (false)
#define pack_ch_2plane(u_plane, v_plane, chroma_pos, line1, line2, uv_mask) \
do { \
uint32_t packed_vals; \
\
__m128i add_val = _mm_add_epi64( \
_mm_and_si128(line1, uv_mask), \
_mm_and_si128(line2, uv_mask)); \
__m128i avg_val = _mm_add_epi64( \
add_val, \
_mm_shuffle_epi32(add_val, _MM_SHUFFLE(2, 3, 0, 1))); \
avg_val = _mm_srai_epi16(avg_val, 2); \
avg_val = _mm_shuffle_epi32(avg_val, _MM_SHUFFLE(3, 1, 2, 0)); \
avg_val = _mm_shufflelo_epi16(avg_val, _MM_SHUFFLE(3, 1, 2, 0)); \
avg_val = _mm_packus_epi16(avg_val, avg_val); \
\
packed_vals = get_m128_32_0(avg_val); \
\
*(uint16_t*)(u_plane+chroma_pos) = (uint16_t)(packed_vals); \
*(uint16_t*)(v_plane+chroma_pos) = (uint16_t)(packed_vals>>16); \
} while (false)
static FORCE_INLINE uint32_t min_uint32(uint32_t a, uint32_t b)
{
return a < b ? a : b;
}
void compress_uyvx_to_i420(
const uint8_t *input, uint32_t in_linesize,
uint32_t start_y, uint32_t end_y,
uint8_t *output[], const uint32_t out_linesize[])
{
uint8_t *lum_plane = output[0];
uint8_t *u_plane = output[1];
uint8_t *v_plane = output[2];
uint32_t width = min_uint32(in_linesize, out_linesize[0]);
uint32_t y;
__m128i lum_mask = _mm_set1_epi32(0x0000FF00);
__m128i uv_mask = _mm_set1_epi16(0x00FF);
for (y = start_y; y < end_y; y += 2) {
uint32_t y_pos = y * in_linesize;
uint32_t chroma_y_pos = (y>>1) * out_linesize[1];
uint32_t lum_y_pos = y * out_linesize[0];
uint32_t x;
for (x = 0; x < width; x += 4) {
const uint8_t *img = input + y_pos + x*4;
uint32_t lum_pos0 = lum_y_pos + x;
uint32_t lum_pos1 = lum_pos0 + out_linesize[0];
__m128i line1 = _mm_load_si128((const __m128i*)img);
__m128i line2 = _mm_load_si128(
(const __m128i*)(img + in_linesize));
pack_lum(lum_plane, lum_pos0, lum_pos1,
line1, line2, lum_mask);
pack_ch_2plane(u_plane, v_plane,
chroma_y_pos + (x>>1),
line1, line2, uv_mask);
}
}
}
void compress_uyvx_to_nv12(
const uint8_t *input, uint32_t in_linesize,
uint32_t start_y, uint32_t end_y,
uint8_t *output[], const uint32_t out_linesize[])
{
uint8_t *lum_plane = output[0];
uint8_t *chroma_plane = output[1];
uint32_t width = min_uint32(in_linesize, out_linesize[0]);
uint32_t y;
__m128i lum_mask = _mm_set1_epi32(0x0000FF00);
__m128i uv_mask = _mm_set1_epi16(0x00FF);
for (y = start_y; y < end_y; y += 2) {
uint32_t y_pos = y * in_linesize;
uint32_t chroma_y_pos = (y>>1) * out_linesize[1];
uint32_t lum_y_pos = y * out_linesize[0];
uint32_t x;
for (x = 0; x < width; x += 4) {
const uint8_t *img = input + y_pos + x*4;
uint32_t lum_pos0 = lum_y_pos + x;
uint32_t lum_pos1 = lum_pos0 + out_linesize[0];
__m128i line1 = _mm_load_si128((const __m128i*)img);
__m128i line2 = _mm_load_si128(
(const __m128i*)(img + in_linesize));
pack_lum(lum_plane, lum_pos0, lum_pos1,
line1, line2, lum_mask);
pack_ch_1plane(chroma_plane, chroma_y_pos + x,
line1, line2, uv_mask);
}
}
}
void decompress_420(
const uint8_t *const input[], const uint32_t in_linesize[],
uint32_t start_y, uint32_t end_y,
uint8_t *output, uint32_t out_linesize)
{
uint32_t start_y_d2 = start_y/2;
uint32_t width_d2 = min_uint32(in_linesize[0], out_linesize)/2;
uint32_t height_d2 = end_y/2;
uint32_t y;
for (y = start_y_d2; y < height_d2; y++) {
const uint8_t *chroma0 = input[1] + y * in_linesize[1];
const uint8_t *chroma1 = input[2] + y * in_linesize[2];
register const uint8_t *lum0, *lum1;
register uint32_t *output0, *output1;
uint32_t x;
lum0 = input[0] + y * 2 * in_linesize[0];
lum1 = lum0 + in_linesize[0];
output0 = (uint32_t*)(output + y * 2 * in_linesize[0]);
output1 = (uint32_t*)((uint8_t*)output0 + in_linesize[0]);
for (x = 0; x < width_d2; x++) {
uint32_t out;
out = (*(chroma0++) << 8) | (*(chroma1++) << 16);
*(output0++) = *(lum0++) | out;
*(output0++) = *(lum0++) | out;
*(output1++) = *(lum1++) | out;
*(output1++) = *(lum1++) | out;
}
}
}
void decompress_nv12(
const uint8_t *const input[], const uint32_t in_linesize[],
uint32_t start_y, uint32_t end_y,
uint8_t *output, uint32_t out_linesize)
{
uint32_t start_y_d2 = start_y/2;
uint32_t width_d2 = min_uint32(in_linesize[0], out_linesize)/2;
uint32_t height_d2 = end_y/2;
uint32_t y;
for (y = start_y_d2; y < height_d2; y++) {
const uint16_t *chroma;
register const uint8_t *lum0, *lum1;
register uint32_t *output0, *output1;
uint32_t x;
chroma = (const uint16_t*)(input[1] + y * in_linesize[1]);
lum0 = input[0] + y * 2 * in_linesize[0];
lum1 = lum0 + in_linesize[0];
output0 = (uint32_t*)(output + y * 2 * out_linesize);
output1 = (uint32_t*)((uint8_t*)output0 + out_linesize);
for (x = 0; x < width_d2; x++) {
uint32_t out = *(chroma++) << 8;
*(output0++) = *(lum0++) | out;
*(output0++) = *(lum0++) | out;
*(output1++) = *(lum1++) | out;
*(output1++) = *(lum1++) | out;
}
}
}
void decompress_422(
const uint8_t *input, uint32_t in_linesize,
uint32_t start_y, uint32_t end_y,
uint8_t *output, uint32_t out_linesize,
bool leading_lum)
{
uint32_t width_d2 = min_uint32(in_linesize, out_linesize)/2;
uint32_t y;
register const uint32_t *input32;
register const uint32_t *input32_end;
register uint32_t *output32;
if (leading_lum) {
for (y = start_y; y < end_y; y++) {
input32 = (const uint32_t*)(input + y*in_linesize);
input32_end = input32 + width_d2;
output32 = (uint32_t*)(output + y*out_linesize);
while(input32 < input32_end) {
register uint32_t dw = *input32;
output32[0] = dw;
dw &= 0xFFFFFF00;
dw |= (uint8_t)(dw>>16);
output32[1] = dw;
output32 += 2;
input32++;
}
}
} else {
for (y = start_y; y < end_y; y++) {
input32 = (const uint32_t*)(input + y*in_linesize);
input32_end = input32 + width_d2;
output32 = (uint32_t*)(output + y*out_linesize);
while (input32 < input32_end) {
register uint32_t dw = *input32;
output32[0] = dw;
dw &= 0xFFFF00FF;
dw |= (dw>>16) & 0xFF00;
output32[1] = dw;
output32 += 2;
input32++;
}
}
}
}
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