2 * Copyright © 2022 Rémi Denis-Courmont.
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "libavutil/attributes.h"
24 #include "libavutil/cpu.h"
25 #include "libavcodec/avcodec.h"
26 #include "libavcodec/alacdsp.h"
28 void ff_alac_decorrelate_stereo_rvv(int32_t *buffer[2], int nb_samples,
29 int decorr_shift, int decorr_left_weight);
30 void ff_alac_append_extra_bits_mono_rvv(int32_t *buffer[2],
31 int32_t *extra_bits_buf[2],
32 int extra_bits, int channels,
34 void ff_alac_append_extra_bits_stereo_rvv(int32_t *buffer[2],
35 int32_t *extra_bits_buf[2],
36 int extra_bits, int channels,
39 av_cold void ff_alacdsp_init_riscv(ALACDSPContext *c)
41 #if HAVE_RVV && (__riscv_xlen == 64)
42 int flags = av_get_cpu_flags();
44 if ((flags & AV_CPU_FLAG_RVV_I32) && (flags & AV_CPU_FLAG_RVB_ADDR)) {
45 c->decorrelate_stereo = ff_alac_decorrelate_stereo_rvv;
46 c->append_extra_bits[0] = ff_alac_append_extra_bits_mono_rvv;
47 c->append_extra_bits[1] = ff_alac_append_extra_bits_stereo_rvv;