mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-07 11:13:41 +02:00
127 lines
3.6 KiB
C
127 lines
3.6 KiB
C
/*
|
|
* Copyright (c) 2012 Mans Rullgard <mans@mansr.com>
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav 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.
|
|
*
|
|
* Libav 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 Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "libavutil/attributes.h"
|
|
#include "libavutil/samplefmt.h"
|
|
#include "flacdsp.h"
|
|
#include "config.h"
|
|
|
|
#define SAMPLE_SIZE 16
|
|
#define PLANAR 0
|
|
#include "flacdsp_template.c"
|
|
|
|
#undef PLANAR
|
|
#define PLANAR 1
|
|
#include "flacdsp_template.c"
|
|
|
|
#undef SAMPLE_SIZE
|
|
#undef PLANAR
|
|
#define SAMPLE_SIZE 32
|
|
#define PLANAR 0
|
|
#include "flacdsp_template.c"
|
|
|
|
#undef PLANAR
|
|
#define PLANAR 1
|
|
#include "flacdsp_template.c"
|
|
|
|
static void flac_lpc_16_c(int32_t *decoded, const int coeffs[32],
|
|
int pred_order, int qlevel, int len)
|
|
{
|
|
int i, j;
|
|
|
|
for (i = pred_order; i < len - 1; i += 2, decoded += 2) {
|
|
int c = coeffs[0];
|
|
int d = decoded[0];
|
|
int s0 = 0, s1 = 0;
|
|
for (j = 1; j < pred_order; j++) {
|
|
s0 += c*d;
|
|
d = decoded[j];
|
|
s1 += c*d;
|
|
c = coeffs[j];
|
|
}
|
|
s0 += c*d;
|
|
d = decoded[j] += s0 >> qlevel;
|
|
s1 += c*d;
|
|
decoded[j + 1] += s1 >> qlevel;
|
|
}
|
|
if (i < len) {
|
|
int sum = 0;
|
|
for (j = 0; j < pred_order; j++)
|
|
sum += coeffs[j] * decoded[j];
|
|
decoded[j] += sum >> qlevel;
|
|
}
|
|
}
|
|
|
|
static void flac_lpc_32_c(int32_t *decoded, const int coeffs[32],
|
|
int pred_order, int qlevel, int len)
|
|
{
|
|
int i, j;
|
|
|
|
for (i = pred_order; i < len; i++, decoded++) {
|
|
int64_t sum = 0;
|
|
for (j = 0; j < pred_order; j++)
|
|
sum += (int64_t)coeffs[j] * decoded[j];
|
|
decoded[j] += sum >> qlevel;
|
|
}
|
|
|
|
}
|
|
|
|
av_cold void ff_flacdsp_init(FLACDSPContext *c, enum AVSampleFormat fmt,
|
|
int bps)
|
|
{
|
|
if (bps > 16)
|
|
c->lpc = flac_lpc_32_c;
|
|
else
|
|
c->lpc = flac_lpc_16_c;
|
|
|
|
switch (fmt) {
|
|
case AV_SAMPLE_FMT_S32:
|
|
c->decorrelate[0] = flac_decorrelate_indep_c_32;
|
|
c->decorrelate[1] = flac_decorrelate_ls_c_32;
|
|
c->decorrelate[2] = flac_decorrelate_rs_c_32;
|
|
c->decorrelate[3] = flac_decorrelate_ms_c_32;
|
|
break;
|
|
|
|
case AV_SAMPLE_FMT_S32P:
|
|
c->decorrelate[0] = flac_decorrelate_indep_c_32p;
|
|
c->decorrelate[1] = flac_decorrelate_ls_c_32p;
|
|
c->decorrelate[2] = flac_decorrelate_rs_c_32p;
|
|
c->decorrelate[3] = flac_decorrelate_ms_c_32p;
|
|
break;
|
|
|
|
case AV_SAMPLE_FMT_S16:
|
|
c->decorrelate[0] = flac_decorrelate_indep_c_16;
|
|
c->decorrelate[1] = flac_decorrelate_ls_c_16;
|
|
c->decorrelate[2] = flac_decorrelate_rs_c_16;
|
|
c->decorrelate[3] = flac_decorrelate_ms_c_16;
|
|
break;
|
|
|
|
case AV_SAMPLE_FMT_S16P:
|
|
c->decorrelate[0] = flac_decorrelate_indep_c_16p;
|
|
c->decorrelate[1] = flac_decorrelate_ls_c_16p;
|
|
c->decorrelate[2] = flac_decorrelate_rs_c_16p;
|
|
c->decorrelate[3] = flac_decorrelate_ms_c_16p;
|
|
break;
|
|
}
|
|
|
|
if (ARCH_ARM)
|
|
ff_flacdsp_init_arm(c, fmt, bps);
|
|
}
|