0,0 → 1,131 |
/* |
* Copyright (c) 2012 Mans Rullgard <mans@mansr.com> |
* |
* 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 "libavutil/attributes.h" |
#include "libavutil/samplefmt.h" |
#include "flacdsp.h" |
#include "config.h" |
|
#define SAMPLE_SIZE 16 |
#define PLANAR 0 |
#include "flacdsp_template.c" |
#include "flacdsp_lpc_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" |
#include "flacdsp_lpc_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; |
c->lpc_encode = flac_lpc_encode_c_32; |
} else { |
c->lpc = flac_lpc_16_c; |
c->lpc_encode = flac_lpc_encode_c_16; |
} |
|
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); |
} |