mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-21 06:50:44 +00:00
95e8325771
patchset. Idea is to share this common code between the AMR and QCELP decoders. Originally committed as revision 17916 to svn://svn.ffmpeg.org/ffmpeg/trunk
158 lines
3.3 KiB
C
158 lines
3.3 KiB
C
/*
|
|
* adaptive and fixed codebook vector operations for ACELP-based codecs
|
|
*
|
|
* Copyright (c) 2008 Vladimir Voroshilov
|
|
*
|
|
* 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 <inttypes.h>
|
|
#include "avcodec.h"
|
|
#include "acelp_vectors.h"
|
|
|
|
const uint8_t ff_fc_2pulses_9bits_track1[16] =
|
|
{
|
|
1, 3,
|
|
6, 8,
|
|
11, 13,
|
|
16, 18,
|
|
21, 23,
|
|
26, 28,
|
|
31, 33,
|
|
36, 38
|
|
};
|
|
const uint8_t ff_fc_2pulses_9bits_track1_gray[16] =
|
|
{
|
|
1, 3,
|
|
8, 6,
|
|
18, 16,
|
|
11, 13,
|
|
38, 36,
|
|
31, 33,
|
|
21, 23,
|
|
28, 26,
|
|
};
|
|
|
|
const uint8_t ff_fc_2pulses_9bits_track2_gray[32] =
|
|
{
|
|
0, 2,
|
|
5, 4,
|
|
12, 10,
|
|
7, 9,
|
|
25, 24,
|
|
20, 22,
|
|
14, 15,
|
|
19, 17,
|
|
36, 31,
|
|
21, 26,
|
|
1, 6,
|
|
16, 11,
|
|
27, 29,
|
|
32, 30,
|
|
39, 37,
|
|
34, 35,
|
|
};
|
|
|
|
const uint8_t ff_fc_4pulses_8bits_tracks_13[16] =
|
|
{
|
|
0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75,
|
|
};
|
|
|
|
const uint8_t ff_fc_4pulses_8bits_track_4[32] =
|
|
{
|
|
3, 4,
|
|
8, 9,
|
|
13, 14,
|
|
18, 19,
|
|
23, 24,
|
|
28, 29,
|
|
33, 34,
|
|
38, 39,
|
|
43, 44,
|
|
48, 49,
|
|
53, 54,
|
|
58, 59,
|
|
63, 64,
|
|
68, 69,
|
|
73, 74,
|
|
78, 79,
|
|
};
|
|
|
|
#if 0
|
|
static uint8_t gray_decode[32] =
|
|
{
|
|
0, 1, 3, 2, 7, 6, 4, 5,
|
|
15, 14, 12, 13, 8, 9, 11, 10,
|
|
31, 30, 28, 29, 24, 25, 27, 26,
|
|
16, 17, 19, 18, 23, 22, 20, 21
|
|
};
|
|
#endif
|
|
|
|
void ff_acelp_fc_pulse_per_track(
|
|
int16_t* fc_v,
|
|
const uint8_t *tab1,
|
|
const uint8_t *tab2,
|
|
int pulse_indexes,
|
|
int pulse_signs,
|
|
int pulse_count,
|
|
int bits)
|
|
{
|
|
int mask = (1 << bits) - 1;
|
|
int i;
|
|
|
|
for(i=0; i<pulse_count; i++)
|
|
{
|
|
fc_v[i + tab1[pulse_indexes & mask]] +=
|
|
(pulse_signs & 1) ? 8191 : -8192; // +/-1 in (2.13)
|
|
|
|
pulse_indexes >>= bits;
|
|
pulse_signs >>= 1;
|
|
}
|
|
|
|
fc_v[tab2[pulse_indexes]] += (pulse_signs & 1) ? 8191 : -8192;
|
|
}
|
|
|
|
void ff_acelp_weighted_vector_sum(
|
|
int16_t* out,
|
|
const int16_t *in_a,
|
|
const int16_t *in_b,
|
|
int16_t weight_coeff_a,
|
|
int16_t weight_coeff_b,
|
|
int16_t rounder,
|
|
int shift,
|
|
int length)
|
|
{
|
|
int i;
|
|
|
|
// Clipping required here; breaks OVERFLOW test.
|
|
for(i=0; i<length; i++)
|
|
out[i] = av_clip_int16((
|
|
in_a[i] * weight_coeff_a +
|
|
in_b[i] * weight_coeff_b +
|
|
rounder) >> shift);
|
|
}
|
|
|
|
void ff_weighted_vector_sumf(float *out, const float *in_a, const float *in_b,
|
|
float weight_coeff_a, float weight_coeff_b, int length)
|
|
{
|
|
int i;
|
|
|
|
for(i=0; i<length; i++)
|
|
out[i] = weight_coeff_a * in_a[i]
|
|
+ weight_coeff_b * in_b[i];
|
|
}
|