mirror of
https://github.com/pineappleEA/pineapple-src.git
synced 2024-12-05 03:38:26 -05:00
122 lines
3.6 KiB
C
122 lines
3.6 KiB
C
|
/*
|
||
|
* SIMD-optimized IDCT functions for HEVC decoding
|
||
|
* Copyright (c) Alexandra Hajkova
|
||
|
*
|
||
|
* 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 "config.h"
|
||
|
|
||
|
#include "libavutil/attributes.h"
|
||
|
#include "libavutil/cpu.h"
|
||
|
#include "libavutil/ppc/cpu.h"
|
||
|
#include "libavutil/ppc/util_altivec.h"
|
||
|
|
||
|
#include "libavcodec/hevcdsp.h"
|
||
|
|
||
|
#if HAVE_ALTIVEC
|
||
|
static const vec_s16 trans4[4] = {
|
||
|
{ 64, 64, 64, 64, 64, 64, 64, 64 },
|
||
|
{ 83, 36, 83, 36, 83, 36, 83, 36 },
|
||
|
{ 64, -64, 64, -64, 64, -64, 64, -64 },
|
||
|
{ 36, -83, 36, -83, 36, -83, 36, -83 },
|
||
|
};
|
||
|
|
||
|
static const vec_u8 mask[2] = {
|
||
|
{ 0x00, 0x01, 0x08, 0x09, 0x10, 0x11, 0x18, 0x19, 0x02, 0x03, 0x0A, 0x0B, 0x12, 0x13, 0x1A, 0x1B },
|
||
|
{ 0x04, 0x05, 0x0C, 0x0D, 0x14, 0x15, 0x1C, 0x1D, 0x06, 0x07, 0x0E, 0x0F, 0x16, 0x17, 0x1E, 0x1F },
|
||
|
};
|
||
|
|
||
|
static av_always_inline void transform4x4(vec_s16 src_01, vec_s16 src_23,
|
||
|
vec_s32 res[4], const int shift,
|
||
|
int16_t *coeffs)
|
||
|
{
|
||
|
vec_s16 src_02, src_13;
|
||
|
vec_s32 zero = vec_splat_s32(0);
|
||
|
vec_s32 e0, o0, e1, o1;
|
||
|
vec_s32 add;
|
||
|
|
||
|
src_13 = vec_mergel(src_01, src_23);
|
||
|
src_02 = vec_mergeh(src_01, src_23);
|
||
|
|
||
|
e0 = vec_msums(src_02, trans4[0], zero);
|
||
|
o0 = vec_msums(src_13, trans4[1], zero);
|
||
|
e1 = vec_msums(src_02, trans4[2], zero);
|
||
|
o1 = vec_msums(src_13, trans4[3], zero);
|
||
|
|
||
|
switch(shift) {
|
||
|
case 7: add = vec_sl(vec_splat_s32(1), vec_splat_u32( 7 - 1)); break;
|
||
|
case 10: add = vec_sl(vec_splat_s32(1), vec_splat_u32(10 - 1)); break;
|
||
|
case 12: add = vec_sl(vec_splat_s32(1), vec_splat_u32(12 - 1)); break;
|
||
|
default: abort();
|
||
|
}
|
||
|
|
||
|
e0 = vec_add(e0, add);
|
||
|
e1 = vec_add(e1, add);
|
||
|
|
||
|
res[0] = vec_add(e0, o0);
|
||
|
res[1] = vec_add(e1, o1);
|
||
|
res[2] = vec_sub(e1, o1);
|
||
|
res[3] = vec_sub(e0, o0);
|
||
|
}
|
||
|
|
||
|
static av_always_inline void scale(vec_s32 res[4], vec_s16 res_packed[2],
|
||
|
const int shift)
|
||
|
{
|
||
|
int i;
|
||
|
vec_u32 v_shift;
|
||
|
|
||
|
switch(shift) {
|
||
|
case 7: v_shift = vec_splat_u32(7) ; break;
|
||
|
case 10: v_shift = vec_splat_u32(10); break;
|
||
|
case 12: v_shift = vec_splat_u32(12); break;
|
||
|
default: abort();
|
||
|
}
|
||
|
|
||
|
for (i = 0; i < 4; i++)
|
||
|
res[i] = vec_sra(res[i], v_shift);
|
||
|
|
||
|
// clip16
|
||
|
res_packed[0] = vec_packs(res[0], res[1]);
|
||
|
res_packed[1] = vec_packs(res[2], res[3]);
|
||
|
}
|
||
|
|
||
|
#define FUNCDECL(a, depth) a ## _ ## depth ## _altivec
|
||
|
#define FUNC(a, b) FUNCDECL(a, b)
|
||
|
|
||
|
#define BIT_DEPTH 8
|
||
|
#include "hevcdsp_template.c"
|
||
|
#undef BIT_DEPTH
|
||
|
|
||
|
#define BIT_DEPTH 10
|
||
|
#include "hevcdsp_template.c"
|
||
|
#undef BIT_DEPTH
|
||
|
#endif /* HAVE_ALTIVEC */
|
||
|
|
||
|
av_cold void ff_hevc_dsp_init_ppc(HEVCDSPContext *c, const int bit_depth)
|
||
|
{
|
||
|
#if HAVE_ALTIVEC
|
||
|
if (!PPC_ALTIVEC(av_get_cpu_flags()))
|
||
|
return;
|
||
|
|
||
|
if (bit_depth == 8)
|
||
|
c->idct[0] = ff_hevc_idct_4x4_8_altivec;
|
||
|
if (bit_depth == 10)
|
||
|
c->idct[0] = ff_hevc_idct_4x4_10_altivec;
|
||
|
#endif /* HAVE_ALTIVEC */
|
||
|
}
|