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/*
* Copyright (c) Radzivon Bartoshyk, 10/2024. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
use crate::avx2::avx2_utils::{
_mm256_deinterleave_x2_epi8, _mm256_havg_epu8, _mm256_store_interleaved_epi8,
};
use crate::yuv_support::{YuvChromaSubsampling, Yuy2Description};
use crate::yuv_to_yuy2::YuvToYuy2Navigation;
#[cfg(target_arch = "x86")]
use std::arch::x86::*;
#[cfg(target_arch = "x86_64")]
use std::arch::x86_64::*;
pub(crate) fn yuv_to_yuy2_avx2_row<const SAMPLING: u8, const YUY2_TARGET: usize>(
y_plane: &[u8],
u_plane: &[u8],
v_plane: &[u8],
yuy2_store: &mut [u8],
width: u32,
nav: YuvToYuy2Navigation,
) -> YuvToYuy2Navigation {
unsafe {
yuv_to_yuy2_avx2_row_impl::<SAMPLING, YUY2_TARGET>(
y_plane, u_plane, v_plane, yuy2_store, width, nav,
)
}
}
#[target_feature(enable = "avx2")]
pub(crate) unsafe fn yuv_to_yuy2_avx2_row_impl<const SAMPLING: u8, const YUY2_TARGET: usize>(
y_plane: &[u8],
u_plane: &[u8],
v_plane: &[u8],
yuy2_store: &mut [u8],
width: u32,
nav: YuvToYuy2Navigation,
) -> YuvToYuy2Navigation {
let yuy2_target: Yuy2Description = YUY2_TARGET.into();
let chroma_subsampling: YuvChromaSubsampling = SAMPLING.into();
let mut _cx = nav.cx;
let mut _uv_x = nav.uv_x;
let mut _yuy2_x = nav.x;
let chroma_big_step = match chroma_subsampling {
YuvChromaSubsampling::Yuv420 | YuvChromaSubsampling::Yuv422 => 32,
YuvChromaSubsampling::Yuv444 => 64,
};
unsafe {
while _cx + 64 < width as usize {
let u_pos = _uv_x;
let v_pos = _uv_x;
let y_pos = _cx;
let u_pixels;
let v_pixels;
let y_ptr = y_plane.as_ptr().add(y_pos);
let y_pixels = (
_mm256_loadu_si256(y_ptr as *const __m256i),
_mm256_loadu_si256(y_ptr.add(32) as *const __m256i),
);
if chroma_subsampling == YuvChromaSubsampling::Yuv444 {
let u_ptr = u_plane.as_ptr().add(u_pos);
let full_u = (
_mm256_loadu_si256(u_ptr as *const __m256i),
_mm256_loadu_si256(u_ptr.add(32) as *const __m256i),
);
let v_ptr = v_plane.as_ptr().add(v_pos);
let full_v = (
_mm256_loadu_si256(v_ptr as *const __m256i),
_mm256_loadu_si256(v_ptr.add(32) as *const __m256i),
);
u_pixels = _mm256_havg_epu8(full_u.0, full_u.1);
v_pixels = _mm256_havg_epu8(full_v.0, full_v.1);
} else {
u_pixels = _mm256_loadu_si256(u_plane.as_ptr().add(u_pos) as *const __m256i);
v_pixels = _mm256_loadu_si256(v_plane.as_ptr().add(v_pos) as *const __m256i);
}
let (low_y, high_y) = _mm256_deinterleave_x2_epi8(y_pixels.0, y_pixels.1);
let storage = match yuy2_target {
Yuy2Description::YUYV => (low_y, u_pixels, high_y, v_pixels),
Yuy2Description::UYVY => (u_pixels, low_y, v_pixels, high_y),
Yuy2Description::YVYU => (low_y, v_pixels, high_y, u_pixels),
Yuy2Description::VYUY => (v_pixels, low_y, u_pixels, high_y),
};
let dst_offset = _cx * 2;
_mm256_store_interleaved_epi8(
yuy2_store.as_mut_ptr().add(dst_offset),
storage.0,
storage.1,
storage.2,
storage.3,
);
_uv_x += chroma_big_step;
_cx += 64;
}
_yuy2_x = _cx;
YuvToYuy2Navigation {
cx: _cx,
uv_x: _uv_x,
x: _yuy2_x,
}
}
}