mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
adaptive and fixed codebook vector operations for ACELP-based codecs
Originally committed as revision 13244 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Vladimir Voroshilov
parent
4a13a2d4f7
commit
5b2729cd0b
147
libavcodec/acelp_vectors.c
Normal file
147
libavcodec/acelp_vectors.c
Normal file
@ -0,0 +1,147 @@
|
||||
/*
|
||||
* 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_indices,
|
||||
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_indices & mask]] +=
|
||||
(pulse_signs & 1) ? 8191 : -8192; // +/-1 in (2.13)
|
||||
|
||||
pulse_indices >>= bits;
|
||||
pulse_signs >>= 1;
|
||||
}
|
||||
|
||||
fc_v[tab2[pulse_indices]] += (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);
|
||||
}
|
||||
151
libavcodec/acelp_vectors.h
Normal file
151
libavcodec/acelp_vectors.h
Normal file
@ -0,0 +1,151 @@
|
||||
/*
|
||||
* 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
|
||||
*/
|
||||
|
||||
#ifndef FFMPEG_ACELP_VECTORS_H
|
||||
#define FFMPEG_ACELP_VECTORS_H
|
||||
|
||||
/*
|
||||
* Track|Pulse| Positions
|
||||
* -------------------------------------------------------------------------
|
||||
* 1 | 0 | 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75
|
||||
* -------------------------------------------------------------------------
|
||||
* 2 | 1 | 1, 6, 11, 16, 21, 26, 31, 36, 41, 46, 51, 56, 61, 66, 71, 76
|
||||
* -------------------------------------------------------------------------
|
||||
* 3 | 2 | 2, 7, 12, 17, 22, 27, 32, 37, 42, 47, 52, 57, 62, 67, 72, 77
|
||||
* -------------------------------------------------------------------------
|
||||
*
|
||||
* Table contains only first the pulse indexes.
|
||||
*
|
||||
* Used in G.729 @8k, G.729 @4.4k, AMR @7.95k, AMR @7.40k
|
||||
*/
|
||||
extern const uint8_t ff_fc_4pulses_8bits_tracks_13[16];
|
||||
|
||||
/*
|
||||
* Track|Pulse| Positions
|
||||
* -------------------------------------------------------------------------
|
||||
* 4 | 3 | 3, 8, 13, 18, 23, 28, 33, 38, 43, 48, 53, 58, 63, 68, 73, 78
|
||||
* | | 4, 9, 14, 19, 24, 29, 34, 39, 44, 49, 54, 59, 64, 69, 74, 79
|
||||
* -------------------------------------------------------------------------
|
||||
*
|
||||
* \remark Track in the table should be read top-to-bottom, left-to-right.
|
||||
*
|
||||
* Used in G.729 @8k, G.729 @4.4k, AMR @7.95k, AMR @7.40k
|
||||
*/
|
||||
extern const uint8_t ff_fc_4pulses_8bits_track_4[32];
|
||||
|
||||
/*
|
||||
* Track|Pulse| Positions
|
||||
* -----------------------------------------
|
||||
* 1 | 0 | 1, 6, 11, 16, 21, 26, 31, 36
|
||||
* | | 3, 8, 13, 18, 23, 28, 33, 38
|
||||
* -----------------------------------------
|
||||
*
|
||||
* \remark Track in the table should be read top-to-bottom, left-to-right.
|
||||
*
|
||||
* \note (EE) Reference G.729D code also uses gray decoding for each
|
||||
* pulse index before looking up the value in the table.
|
||||
*
|
||||
* Used in G.729 @6.4k (with gray coding), AMD @5.9k (without gray coding)
|
||||
*/
|
||||
extern const uint8_t ff_fc_2pulses_9bits_track1[16];
|
||||
extern const uint8_t ff_fc_2pulses_9bits_track1_gray[16];
|
||||
|
||||
/*
|
||||
* Track|Pulse| Positions
|
||||
* -----------------------------------------
|
||||
* 2 | 1 | 0, 7, 14, 20, 27, 34, 1, 21
|
||||
* | | 2, 9, 15, 22, 29, 35, 6, 26
|
||||
* | | 4,10, 17, 24, 30, 37, 11, 31
|
||||
* | | 5,12, 19, 25, 32, 39, 16, 36
|
||||
* -----------------------------------------
|
||||
*
|
||||
* \remark Track in the table should be read top-to-bottom, left-to-right.
|
||||
*
|
||||
* \note (EE.1) This table (from the reference code) does not comply with
|
||||
* the specification.
|
||||
* The specification contains the following table:
|
||||
*
|
||||
* Track|Pulse| Positions
|
||||
* -----------------------------------------
|
||||
* 2 | 1 | 0, 5, 10, 15, 20, 25, 30, 35
|
||||
* | | 1, 6, 11, 16, 21, 26, 31, 36
|
||||
* | | 2, 7, 12, 17, 22, 27, 32, 37
|
||||
* | | 4, 9, 14, 19, 24, 29, 34, 39
|
||||
*
|
||||
* -----------------------------------------
|
||||
*
|
||||
* \note (EE.2) Reference G.729D code also uses gray decoding for each
|
||||
* pulse index before looking up the value in the table.
|
||||
*
|
||||
* Used in G.729 @6.4k (with gray coding)
|
||||
*/
|
||||
extern const uint8_t ff_fc_2pulses_9bits_track2_gray[32];
|
||||
|
||||
/**
|
||||
* \brief Decode fixed-codebook vector (3.8 and D.5.8 of G.729, 5.7.1 of AMR).
|
||||
* \param fc_v [out] decoded fixed codebook vector (2.13)
|
||||
* \param tab1 table used for first pulse_count pulses
|
||||
* \param tab2 table used for last pulse
|
||||
* \param pulse_indices fixed codebook indeces
|
||||
* \param pulse_signs signs of the excitation pulses (0 bit value
|
||||
* means negative sign)
|
||||
* \param bits number of bits per one pulse index
|
||||
* \param pulse_count number of pulses decoded using first table
|
||||
* \param bits length of one pulse index in bits
|
||||
*
|
||||
* Used in G.729 @8k, G.729 @4.4k, G.729 @6.4k, AMR @7.95k, AMR @7.40k
|
||||
*/
|
||||
void ff_acelp_fc_pulse_per_track(
|
||||
int16_t* fc_v,
|
||||
const uint8_t *tab1,
|
||||
const uint8_t *tab2,
|
||||
int pulse_indices,
|
||||
int pulse_signs,
|
||||
int pulse_count,
|
||||
int bits);
|
||||
|
||||
/**
|
||||
* \brief weighted sum of two vectors with rounding
|
||||
* \param out [out] result of addition
|
||||
* \param in_a first vector
|
||||
* \param in_b second vector
|
||||
* \param weight_coeff_a first vector weight coefficient
|
||||
* \param weight_coeff_a second vector weight coefficient
|
||||
* \param rounder this value will be added to the sum of the two vectors
|
||||
* \param shift result will be shifted to right by this value
|
||||
* \param length vectors length
|
||||
*
|
||||
* \note It is safe to pass the same buffer for out and in_a or in_b.
|
||||
*
|
||||
* out[i] = (in_a[i]*weight_a+in_b[i]*weight_b+rounder) >> shift
|
||||
*/
|
||||
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);
|
||||
|
||||
#endif // FFMPEG_ACELP_VECTORS_H
|
||||
Loading…
Reference in New Issue
Block a user