8009581912
This is implemented for a vector size of 128-bit. Since the scalar product in the inner loop covers 5 samples or 160 bits, we need a group multipler of 2. To avoid reconfiguring the vector type, the outer loop, which loads multiple input samples sticks to the same multipler. Consequently, the outer loop loads 8 samples per iteration. This is safe since the minimum period of the CELT codec is 15 samples. The same code would also work, albeit needlessly inefficiently with a vector length of 256 bits. A proper implementation will follow instead.
43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
/*
|
|
* Copyright © 2022 Rémi Denis-Courmont.
|
|
*
|
|
* 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/riscv/cpu.h"
|
|
#include "libavcodec/opusdsp.h"
|
|
|
|
void ff_opus_postfilter_rvv_128(float *data, int period, float *g, int len);
|
|
|
|
av_cold void ff_opus_dsp_init_riscv(OpusDSP *d)
|
|
{
|
|
#if HAVE_RVV
|
|
int flags = av_get_cpu_flags();
|
|
|
|
if (flags & AV_CPU_FLAG_RVV_F32)
|
|
switch (ff_get_rv_vlenb()) {
|
|
case 16:
|
|
d->postfilter = ff_opus_postfilter_rvv_128;
|
|
break;
|
|
}
|
|
#endif
|
|
}
|