0,0 → 1,141 |
/* |
* 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 <stdint.h> |
#include "libavutil/avutil.h" |
#include "mathops.h" |
|
#undef FUNC |
#undef sum_type |
#undef MUL |
#undef CLIP |
#undef FSUF |
|
#define FUNC(n) AV_JOIN(n ## _, SAMPLE_SIZE) |
|
#if SAMPLE_SIZE == 32 |
# define sum_type int64_t |
# define MUL(a, b) MUL64(a, b) |
# define CLIP(x) av_clipl_int32(x) |
#else |
# define sum_type int32_t |
# define MUL(a, b) ((a) * (b)) |
# define CLIP(x) (x) |
#endif |
|
#define LPC1(x) { \ |
int c = coefs[(x)-1]; \ |
p0 += MUL(c, s); \ |
s = smp[i-(x)+1]; \ |
p1 += MUL(c, s); \ |
} |
|
static av_always_inline void FUNC(lpc_encode_unrolled)(int32_t *res, |
const int32_t *smp, int len, int order, |
const int32_t *coefs, int shift, int big) |
{ |
int i; |
for (i = order; i < len; i += 2) { |
int s = smp[i-order]; |
sum_type p0 = 0, p1 = 0; |
if (big) { |
switch (order) { |
case 32: LPC1(32) |
case 31: LPC1(31) |
case 30: LPC1(30) |
case 29: LPC1(29) |
case 28: LPC1(28) |
case 27: LPC1(27) |
case 26: LPC1(26) |
case 25: LPC1(25) |
case 24: LPC1(24) |
case 23: LPC1(23) |
case 22: LPC1(22) |
case 21: LPC1(21) |
case 20: LPC1(20) |
case 19: LPC1(19) |
case 18: LPC1(18) |
case 17: LPC1(17) |
case 16: LPC1(16) |
case 15: LPC1(15) |
case 14: LPC1(14) |
case 13: LPC1(13) |
case 12: LPC1(12) |
case 11: LPC1(11) |
case 10: LPC1(10) |
case 9: LPC1( 9) |
LPC1( 8) |
LPC1( 7) |
LPC1( 6) |
LPC1( 5) |
LPC1( 4) |
LPC1( 3) |
LPC1( 2) |
LPC1( 1) |
} |
} else { |
switch (order) { |
case 8: LPC1( 8) |
case 7: LPC1( 7) |
case 6: LPC1( 6) |
case 5: LPC1( 5) |
case 4: LPC1( 4) |
case 3: LPC1( 3) |
case 2: LPC1( 2) |
case 1: LPC1( 1) |
} |
} |
res[i ] = smp[i ] - CLIP(p0 >> shift); |
res[i+1] = smp[i+1] - CLIP(p1 >> shift); |
} |
} |
|
static void FUNC(flac_lpc_encode_c)(int32_t *res, const int32_t *smp, int len, |
int order, const int32_t *coefs, int shift) |
{ |
int i; |
for (i = 0; i < order; i++) |
res[i] = smp[i]; |
#if CONFIG_SMALL |
for (i = order; i < len; i += 2) { |
int j; |
int s = smp[i]; |
sum_type p0 = 0, p1 = 0; |
for (j = 0; j < order; j++) { |
int c = coefs[j]; |
p1 += MUL(c, s); |
s = smp[i-j-1]; |
p0 += MUL(c, s); |
} |
res[i ] = smp[i ] - CLIP(p0 >> shift); |
res[i+1] = smp[i+1] - CLIP(p1 >> shift); |
} |
#else |
switch (order) { |
case 1: FUNC(lpc_encode_unrolled)(res, smp, len, 1, coefs, shift, 0); break; |
case 2: FUNC(lpc_encode_unrolled)(res, smp, len, 2, coefs, shift, 0); break; |
case 3: FUNC(lpc_encode_unrolled)(res, smp, len, 3, coefs, shift, 0); break; |
case 4: FUNC(lpc_encode_unrolled)(res, smp, len, 4, coefs, shift, 0); break; |
case 5: FUNC(lpc_encode_unrolled)(res, smp, len, 5, coefs, shift, 0); break; |
case 6: FUNC(lpc_encode_unrolled)(res, smp, len, 6, coefs, shift, 0); break; |
case 7: FUNC(lpc_encode_unrolled)(res, smp, len, 7, coefs, shift, 0); break; |
case 8: FUNC(lpc_encode_unrolled)(res, smp, len, 8, coefs, shift, 0); break; |
default: FUNC(lpc_encode_unrolled)(res, smp, len, order, coefs, shift, 1); break; |
} |
#endif |
} |