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ffmpeg/libswscale/loongarch/yuv2rgb_lsx.c
Niklas Haas 67adb30322 swscale: rename SwsContext to SwsInternal 
And preserve the public SwsContext as separate name. The motivation here
is that I want to turn SwsContext into a public struct, while keeping the
internal implementation hidden. Additionally, I also want to be able to
use multiple internal implementations, e.g. for GPU devices.

This commit does not include any functional changes. For the most part, it is
a simple rename. The only complications arise from the public facing API
functions, which preserve their current type (and hence require an additional
unwrapping step internally), and the checkasm test framework, which directly
accesses SwsInternal.

For consistency, the affected functions that need to maintain a distionction
have generally been changed to refer to the SwsContext as *sws, and the
SwsInternal as *c.

In an upcoming commit, I will provide a backing definition for the public
SwsContext, and update `sws_internal()` to dereference the internal struct
instead of merely casting it.

Sponsored-by: Sovereign Tech Fund
Signed-off-by: Niklas Haas <git@haasn.dev>
2024-10-24 22:50:00 +02:00

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/*
* Copyright (C) 2023 Loongson Technology Co. Ltd.
* Contributed by Bo Jin(jinbo@loongson.cn)
* All rights reserved.
*
* 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 "swscale_loongarch.h"
#include "libavutil/loongarch/loongson_intrinsics.h"
#define YUV2RGB_LOAD_COE \
/* Load x_offset */ \
__m128i y_offset = __lsx_vreplgr2vr_d(c->yOffset); \
__m128i u_offset = __lsx_vreplgr2vr_d(c->uOffset); \
__m128i v_offset = __lsx_vreplgr2vr_d(c->vOffset); \
/* Load x_coeff */ \
__m128i ug_coeff = __lsx_vreplgr2vr_d(c->ugCoeff); \
__m128i vg_coeff = __lsx_vreplgr2vr_d(c->vgCoeff); \
__m128i y_coeff = __lsx_vreplgr2vr_d(c->yCoeff); \
__m128i ub_coeff = __lsx_vreplgr2vr_d(c->ubCoeff); \
__m128i vr_coeff = __lsx_vreplgr2vr_d(c->vrCoeff); \
#define LOAD_YUV_16 \
m_y1 = __lsx_vld(py_1, 0); \
m_y2 = __lsx_vld(py_2, 0); \
m_u = __lsx_vldrepl_d(pu, 0); \
m_v = __lsx_vldrepl_d(pv, 0); \
DUP2_ARG2(__lsx_vilvl_b, m_u, m_u, m_v, m_v, m_u, m_v); \
DUP2_ARG2(__lsx_vilvh_b, zero, m_u, zero, m_v, m_u_h, m_v_h); \
DUP2_ARG2(__lsx_vilvl_b, zero, m_u, zero, m_v, m_u, m_v); \
DUP2_ARG2(__lsx_vilvh_b, zero, m_y1, zero, m_y2, m_y1_h, m_y2_h); \
DUP2_ARG2(__lsx_vilvl_b, zero, m_y1, zero, m_y2, m_y1, m_y2); \
/* YUV2RGB method
* The conversion method is as follows:
* R = Y' * y_coeff + V' * vr_coeff
* G = Y' * y_coeff + V' * vg_coeff + U' * ug_coeff
* B = Y' * y_coeff + U' * ub_coeff
*
* where X' = X * 8 - x_offset
*
*/
#define YUV2RGB(y1, y2, u, v, r1, g1, b1, r2, g2, b2) \
{ \
y1 = __lsx_vslli_h(y1, 3); \
y2 = __lsx_vslli_h(y2, 3); \
u = __lsx_vslli_h(u, 3); \
v = __lsx_vslli_h(v, 3); \
y1 = __lsx_vsub_h(y1, y_offset); \
y2 = __lsx_vsub_h(y2, y_offset); \
u = __lsx_vsub_h(u, u_offset); \
v = __lsx_vsub_h(v, v_offset); \
y_1 = __lsx_vmuh_h(y1, y_coeff); \
y_2 = __lsx_vmuh_h(y2, y_coeff); \
u2g = __lsx_vmuh_h(u, ug_coeff); \
u2b = __lsx_vmuh_h(u, ub_coeff); \
v2r = __lsx_vmuh_h(v, vr_coeff); \
v2g = __lsx_vmuh_h(v, vg_coeff); \
r1 = __lsx_vsadd_h(y_1, v2r); \
v2g = __lsx_vsadd_h(v2g, u2g); \
g1 = __lsx_vsadd_h(y_1, v2g); \
b1 = __lsx_vsadd_h(y_1, u2b); \
r2 = __lsx_vsadd_h(y_2, v2r); \
g2 = __lsx_vsadd_h(y_2, v2g); \
b2 = __lsx_vsadd_h(y_2, u2b); \
DUP4_ARG1(__lsx_vclip255_h, r1, g1, b1, r2, r1, g1, b1, r2); \
DUP2_ARG1(__lsx_vclip255_h, g2, b2, g2, b2); \
}
#define RGB_PACK(r, g, b, rgb_l, rgb_h) \
{ \
__m128i rg; \
rg = __lsx_vpackev_b(g, r); \
DUP2_ARG3(__lsx_vshuf_b, b, rg, shuf2, b, rg, shuf3, rgb_l, rgb_h); \
}
#define RGB32_PACK(a, r, g, b, rgb_l, rgb_h) \
{ \
__m128i ra, bg; \
ra = __lsx_vpackev_b(r, a); \
bg = __lsx_vpackev_b(b, g); \
rgb_l = __lsx_vilvl_h(bg, ra); \
rgb_h = __lsx_vilvh_h(bg, ra); \
}
#define RGB_STORE(rgb_l, rgb_h, image) \
{ \
__lsx_vstelm_d(rgb_l, image, 0, 0); \
__lsx_vstelm_d(rgb_l, image, 8, 1); \
__lsx_vstelm_d(rgb_h, image, 16, 0); \
}
#define RGB32_STORE(rgb_l, rgb_h, image) \
{ \
__lsx_vst(rgb_l, image, 0); \
__lsx_vst(rgb_h, image, 16); \
}
#define YUV2RGBFUNC(func_name, dst_type, alpha) \
int func_name(SwsInternal *c, const uint8_t *const src[], \
const int srcStride[], int srcSliceY, int srcSliceH, \
uint8_t *const dst[], const int dstStride[]) \
{ \
int x, y, h_size, vshift, res; \
__m128i m_y1, m_y2, m_u, m_v; \
__m128i m_y1_h, m_y2_h, m_u_h, m_v_h; \
__m128i y_1, y_2, u2g, v2g, u2b, v2r, rgb1_l, rgb1_h; \
__m128i rgb2_l, rgb2_h, r1, g1, b1, r2, g2, b2; \
__m128i shuf2 = {0x0504120302100100, 0x0A18090816070614}; \
__m128i shuf3 = {0x1E0F0E1C0D0C1A0B, 0x0101010101010101}; \
__m128i zero = __lsx_vldi(0); \
\
YUV2RGB_LOAD_COE \
\
h_size = c->dstW >> 4; \
res = (c->dstW & 15) >> 1; \
vshift = c->srcFormat != AV_PIX_FMT_YUV422P; \
for (y = 0; y < srcSliceH; y += 2) { \
dst_type av_unused *r, *g, *b; \
dst_type *image1 = (dst_type *)(dst[0] + (y + srcSliceY) * dstStride[0]);\
dst_type *image2 = (dst_type *)(image1 + dstStride[0]);\
const uint8_t *py_1 = src[0] + y * srcStride[0]; \
const uint8_t *py_2 = py_1 + srcStride[0]; \
const uint8_t *pu = src[1] + (y >> vshift) * srcStride[1]; \
const uint8_t *pv = src[2] + (y >> vshift) * srcStride[2]; \
for(x = 0; x < h_size; x++) { \
#define YUV2RGBFUNC32(func_name, dst_type, alpha) \
int func_name(SwsInternal *c, const uint8_t *const src[], \
const int srcStride[], int srcSliceY, int srcSliceH, \
uint8_t *const dst[], const int dstStride[]) \
{ \
int x, y, h_size, vshift, res; \
__m128i m_y1, m_y2, m_u, m_v; \
__m128i m_y1_h, m_y2_h, m_u_h, m_v_h; \
__m128i y_1, y_2, u2g, v2g, u2b, v2r, rgb1_l, rgb1_h; \
__m128i rgb2_l, rgb2_h, r1, g1, b1, r2, g2, b2; \
__m128i a = __lsx_vldi(0xFF); \
__m128i zero = __lsx_vldi(0); \
\
YUV2RGB_LOAD_COE \
\
h_size = c->dstW >> 4; \
res = (c->dstW & 15) >> 1; \
vshift = c->srcFormat != AV_PIX_FMT_YUV422P; \
for (y = 0; y < srcSliceH; y += 2) { \
int yd = y + srcSliceY; \
dst_type av_unused *r, *g, *b; \
dst_type *image1 = (dst_type *)(dst[0] + (yd) * dstStride[0]); \
dst_type *image2 = (dst_type *)(dst[0] + (yd + 1) * dstStride[0]); \
const uint8_t *py_1 = src[0] + y * srcStride[0]; \
const uint8_t *py_2 = py_1 + srcStride[0]; \
const uint8_t *pu = src[1] + (y >> vshift) * srcStride[1]; \
const uint8_t *pv = src[2] + (y >> vshift) * srcStride[2]; \
for(x = 0; x < h_size; x++) { \
#define DEALYUV2RGBREMAIN \
py_1 += 16; \
py_2 += 16; \
pu += 8; \
pv += 8; \
image1 += 48; \
image2 += 48; \
} \
for (x = 0; x < res; x++) { \
int av_unused U, V, Y; \
U = pu[0]; \
V = pv[0]; \
r = (void *)c->table_rV[V+YUVRGB_TABLE_HEADROOM]; \
g = (void *)(c->table_gU[U+YUVRGB_TABLE_HEADROOM] \
+ c->table_gV[V+YUVRGB_TABLE_HEADROOM]); \
b = (void *)c->table_bU[U+YUVRGB_TABLE_HEADROOM];
#define DEALYUV2RGBREMAIN32 \
py_1 += 16; \
py_2 += 16; \
pu += 8; \
pv += 8; \
image1 += 16; \
image2 += 16; \
} \
for (x = 0; x < res; x++) { \
int av_unused U, V, Y; \
U = pu[0]; \
V = pv[0]; \
r = (void *)c->table_rV[V+YUVRGB_TABLE_HEADROOM]; \
g = (void *)(c->table_gU[U+YUVRGB_TABLE_HEADROOM] \
+ c->table_gV[V+YUVRGB_TABLE_HEADROOM]); \
b = (void *)c->table_bU[U+YUVRGB_TABLE_HEADROOM]; \
#define PUTRGB24(dst, src) \
Y = src[0]; \
dst[0] = r[Y]; \
dst[1] = g[Y]; \
dst[2] = b[Y]; \
Y = src[1]; \
dst[3] = r[Y]; \
dst[4] = g[Y]; \
dst[5] = b[Y];
#define PUTBGR24(dst, src) \
Y = src[0]; \
dst[0] = b[Y]; \
dst[1] = g[Y]; \
dst[2] = r[Y]; \
Y = src[1]; \
dst[3] = b[Y]; \
dst[4] = g[Y]; \
dst[5] = r[Y];
#define PUTRGB(dst, src) \
Y = src[0]; \
dst[0] = r[Y] + g[Y] + b[Y]; \
Y = src[1]; \
dst[1] = r[Y] + g[Y] + b[Y]; \
#define ENDRES \
pu += 1; \
pv += 1; \
py_1 += 2; \
py_2 += 2; \
image1 += 6; \
image2 += 6; \
#define ENDRES32 \
pu += 1; \
pv += 1; \
py_1 += 2; \
py_2 += 2; \
image1 += 2; \
image2 += 2; \
#define END_FUNC() \
} \
} \
return srcSliceH; \
}
YUV2RGBFUNC(yuv420_rgb24_lsx, uint8_t, 0)
LOAD_YUV_16
YUV2RGB(m_y1, m_y2, m_u, m_v, r1, g1, b1, r2, g2, b2);
RGB_PACK(r1, g1, b1, rgb1_l, rgb1_h);
RGB_PACK(r2, g2, b2, rgb2_l, rgb2_h);
RGB_STORE(rgb1_l, rgb1_h, image1);
RGB_STORE(rgb2_l, rgb2_h, image2);
YUV2RGB(m_y1_h, m_y2_h, m_u_h, m_v_h, r1, g1, b1, r2, g2, b2);
RGB_PACK(r1, g1, b1, rgb1_l, rgb1_h);
RGB_PACK(r2, g2, b2, rgb2_l, rgb2_h);
RGB_STORE(rgb1_l, rgb1_h, image1 + 24);
RGB_STORE(rgb2_l, rgb2_h, image2 + 24);
DEALYUV2RGBREMAIN
PUTRGB24(image1, py_1);
PUTRGB24(image2, py_2);
ENDRES
END_FUNC()
YUV2RGBFUNC(yuv420_bgr24_lsx, uint8_t, 0)
LOAD_YUV_16
YUV2RGB(m_y1, m_y2, m_u, m_v, r1, g1, b1, r2, g2, b2);
RGB_PACK(b1, g1, r1, rgb1_l, rgb1_h);
RGB_PACK(b2, g2, r2, rgb2_l, rgb2_h);
RGB_STORE(rgb1_l, rgb1_h, image1);
RGB_STORE(rgb2_l, rgb2_h, image2);
YUV2RGB(m_y1_h, m_y2_h, m_u_h, m_v_h, r1, g1, b1, r2, g2, b2);
RGB_PACK(b1, g1, r1, rgb1_l, rgb1_h);
RGB_PACK(b2, g2, r2, rgb2_l, rgb2_h);
RGB_STORE(rgb1_l, rgb1_h, image1 + 24);
RGB_STORE(rgb2_l, rgb2_h, image2 + 24);
DEALYUV2RGBREMAIN
PUTBGR24(image1, py_1);
PUTBGR24(image2, py_2);
ENDRES
END_FUNC()
YUV2RGBFUNC32(yuv420_rgba32_lsx, uint32_t, 0)
LOAD_YUV_16
YUV2RGB(m_y1, m_y2, m_u, m_v, r1, g1, b1, r2, g2, b2);
RGB32_PACK(r1, g1, b1, a, rgb1_l, rgb1_h);
RGB32_PACK(r2, g2, b2, a, rgb2_l, rgb2_h);
RGB32_STORE(rgb1_l, rgb1_h, image1);
RGB32_STORE(rgb2_l, rgb2_h, image2);
YUV2RGB(m_y1_h, m_y2_h, m_u_h, m_v_h, r1, g1, b1, r2, g2, b2);
RGB32_PACK(r1, g1, b1, a, rgb1_l, rgb1_h);
RGB32_PACK(r2, g2, b2, a, rgb2_l, rgb2_h);
RGB32_STORE(rgb1_l, rgb1_h, image1 + 8);
RGB32_STORE(rgb2_l, rgb2_h, image2 + 8);
DEALYUV2RGBREMAIN32
PUTRGB(image1, py_1);
PUTRGB(image2, py_2);
ENDRES32
END_FUNC()
YUV2RGBFUNC32(yuv420_bgra32_lsx, uint32_t, 0)
LOAD_YUV_16
YUV2RGB(m_y1, m_y2, m_u, m_v, r1, g1, b1, r2, g2, b2);
RGB32_PACK(b1, g1, r1, a, rgb1_l, rgb1_h);
RGB32_PACK(b2, g2, r2, a, rgb2_l, rgb2_h);
RGB32_STORE(rgb1_l, rgb1_h, image1);
RGB32_STORE(rgb2_l, rgb2_h, image2);
YUV2RGB(m_y1_h, m_y2_h, m_u_h, m_v_h, r1, g1, b1, r2, g2, b2);
RGB32_PACK(b1, g1, r1, a, rgb1_l, rgb1_h);
RGB32_PACK(b2, g2, r2, a, rgb2_l, rgb2_h);
RGB32_STORE(rgb1_l, rgb1_h, image1 + 8);
RGB32_STORE(rgb2_l, rgb2_h, image2 + 8);
DEALYUV2RGBREMAIN32
PUTRGB(image1, py_1);
PUTRGB(image2, py_2);
ENDRES32
END_FUNC()
YUV2RGBFUNC32(yuv420_argb32_lsx, uint32_t, 0)
LOAD_YUV_16
YUV2RGB(m_y1, m_y2, m_u, m_v, r1, g1, b1, r2, g2, b2);
RGB32_PACK(a, r1, g1, b1, rgb1_l, rgb1_h);
RGB32_PACK(a, r2, g2, b2, rgb2_l, rgb2_h);
RGB32_STORE(rgb1_l, rgb1_h, image1);
RGB32_STORE(rgb2_l, rgb2_h, image2);
YUV2RGB(m_y1_h, m_y2_h, m_u_h, m_v_h, r1, g1, b1, r2, g2, b2);
RGB32_PACK(a, r1, g1, b1, rgb1_l, rgb1_h);
RGB32_PACK(a, r2, g2, b2, rgb2_l, rgb2_h);
RGB32_STORE(rgb1_l, rgb1_h, image1 + 8);
RGB32_STORE(rgb2_l, rgb2_h, image2 + 8);
DEALYUV2RGBREMAIN32
PUTRGB(image1, py_1);
PUTRGB(image2, py_2);
ENDRES32
END_FUNC()
YUV2RGBFUNC32(yuv420_abgr32_lsx, uint32_t, 0)
LOAD_YUV_16
YUV2RGB(m_y1, m_y2, m_u, m_v, r1, g1, b1, r2, g2, b2);
RGB32_PACK(a, b1, g1, r1, rgb1_l, rgb1_h);
RGB32_PACK(a, b2, g2, r2, rgb2_l, rgb2_h);
RGB32_STORE(rgb1_l, rgb1_h, image1);
RGB32_STORE(rgb2_l, rgb2_h, image2);
YUV2RGB(m_y1_h, m_y2_h, m_u_h, m_v_h, r1, g1, b1, r2, g2, b2);
RGB32_PACK(a, b1, g1, r1, rgb1_l, rgb1_h);
RGB32_PACK(a, b2, g2, r2, rgb2_l, rgb2_h);
RGB32_STORE(rgb1_l, rgb1_h, image1 + 8);
RGB32_STORE(rgb2_l, rgb2_h, image2 + 8);
DEALYUV2RGBREMAIN32
PUTRGB(image1, py_1);
PUTRGB(image2, py_2);
ENDRES32
END_FUNC()
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