mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-14 05:12:09 +00:00
a5350f2d0c
It was using a 24000/24000/48000, but I think it meant to use 24000/32000/48000. Not 100% sure... https://en.wikipedia.org/wiki/G.722.1 has the list of supported bitrates. It's not clear whether the "flag" code maps to this, however. Coverity 206072
529 lines
14 KiB
C
529 lines
14 KiB
C
/*
|
|
* Siren Encoder/Decoder library
|
|
*
|
|
* @author: Youness Alaoui <kakaroto@kakaroto.homelinux.net>
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#include "siren7.h"
|
|
|
|
int region_size;
|
|
float region_size_inverse;
|
|
|
|
float standard_deviation[64];
|
|
float deviation_inverse[64];
|
|
float region_power_table_boundary[63];
|
|
|
|
int expected_bits_table[8] = { 52, 47, 43, 37, 29, 22, 16, 0 };
|
|
int vector_dimension[8] = { 2, 2, 2, 4, 4, 5, 5, 1 };
|
|
int number_of_vectors[8] = { 10, 10, 10, 5, 5, 4, 4, 20 };
|
|
float dead_zone[8] = { 0.3f, 0.33f, 0.36f, 0.39f, 0.42f, 0.45f, 0.5f, 0.5f };
|
|
|
|
int max_bin[8] = {
|
|
13,
|
|
9,
|
|
6,
|
|
4,
|
|
3,
|
|
2,
|
|
1,
|
|
1
|
|
};
|
|
|
|
float step_size[8] = {
|
|
0.3536f,
|
|
0.5f,
|
|
0.70709997f,
|
|
1.0f,
|
|
1.4141999f,
|
|
2.0f,
|
|
2.8283999f,
|
|
2.8283999f
|
|
};
|
|
|
|
float step_size_inverse[8];
|
|
|
|
static int siren_initialized = 0;
|
|
|
|
/*
|
|
STEPSIZE = 2.0 * log(sqrt(2));
|
|
*/
|
|
#define STEPSIZE 0.3010299957
|
|
|
|
void
|
|
siren_init (void)
|
|
{
|
|
int i;
|
|
float region_power;
|
|
|
|
if (siren_initialized == 1)
|
|
return;
|
|
|
|
region_size = 20;
|
|
region_size_inverse = 1.0f / region_size;
|
|
|
|
for (i = 0; i < 64; i++) {
|
|
region_power = (float) pow (10, (i - 24) * STEPSIZE);
|
|
standard_deviation[i] = (float) sqrt (region_power);
|
|
deviation_inverse[i] = (float) 1.0 / standard_deviation[i];
|
|
}
|
|
|
|
for (i = 0; i < 63; i++)
|
|
region_power_table_boundary[i] =
|
|
(float) pow (10, (i - 24 + 0.5) * STEPSIZE);
|
|
|
|
for (i = 0; i < 8; i++)
|
|
step_size_inverse[i] = (float) 1.0 / step_size[i];
|
|
|
|
siren_dct4_init ();
|
|
siren_rmlt_init ();
|
|
|
|
siren_initialized = 1;
|
|
}
|
|
|
|
|
|
int
|
|
categorize_regions (int number_of_regions, int number_of_available_bits,
|
|
int *absolute_region_power_index, int *power_categories,
|
|
int *category_balance)
|
|
{
|
|
int region, delta, i, temp;
|
|
int expected_number_of_code_bits;
|
|
int min, max;
|
|
int offset,
|
|
num_rate_control_possibilities,
|
|
raw_value, raw_max_idx = 0, raw_min_idx = 0;
|
|
int max_rate_categories[28];
|
|
int min_rate_categories[28];
|
|
int temp_category_balances[64];
|
|
int *min_rate_ptr = NULL;
|
|
int *max_rate_ptr = NULL;
|
|
|
|
if (number_of_regions == 14) {
|
|
num_rate_control_possibilities = 16;
|
|
if (number_of_available_bits > 320)
|
|
number_of_available_bits =
|
|
((number_of_available_bits - 320) * 5 / 8) + 320;
|
|
} else {
|
|
num_rate_control_possibilities = 32;
|
|
if (number_of_regions == 28 && number_of_available_bits > 640)
|
|
number_of_available_bits =
|
|
((number_of_available_bits - 640) * 5 / 8) + 640;
|
|
}
|
|
|
|
offset = -32;
|
|
for (delta = 32; number_of_regions > 0 && delta > 0; delta /= 2) {
|
|
expected_number_of_code_bits = 0;
|
|
for (region = 0; region < number_of_regions; region++) {
|
|
i = (delta + offset - absolute_region_power_index[region]) >> 1;
|
|
if (i > 7)
|
|
i = 7;
|
|
else if (i < 0)
|
|
i = 0;
|
|
|
|
power_categories[region] = i;
|
|
expected_number_of_code_bits += expected_bits_table[i];
|
|
|
|
}
|
|
if (expected_number_of_code_bits >= number_of_available_bits - 32)
|
|
offset += delta;
|
|
}
|
|
|
|
expected_number_of_code_bits = 0;
|
|
for (region = 0; region < number_of_regions; region++) {
|
|
i = (offset - absolute_region_power_index[region]) >> 1;
|
|
if (i > 7)
|
|
i = 7;
|
|
else if (i < 0)
|
|
i = 0;
|
|
max_rate_categories[region] = min_rate_categories[region] =
|
|
power_categories[region] = i;
|
|
expected_number_of_code_bits += expected_bits_table[i];
|
|
}
|
|
|
|
|
|
min = max = expected_number_of_code_bits;
|
|
min_rate_ptr = max_rate_ptr =
|
|
temp_category_balances + num_rate_control_possibilities;
|
|
for (i = 0; i < num_rate_control_possibilities - 1; i++) {
|
|
if (min + max > number_of_available_bits * 2) {
|
|
raw_value = -99;
|
|
for (region = number_of_regions - 1; region >= 0; region--) {
|
|
if (min_rate_categories[region] < 7) {
|
|
temp =
|
|
offset - absolute_region_power_index[region] -
|
|
2 * min_rate_categories[region];
|
|
if (temp > raw_value) {
|
|
raw_value = temp;
|
|
raw_min_idx = region;
|
|
}
|
|
}
|
|
}
|
|
*min_rate_ptr++ = raw_min_idx;
|
|
min +=
|
|
expected_bits_table[min_rate_categories[raw_min_idx] + 1] -
|
|
expected_bits_table[min_rate_categories[raw_min_idx]];
|
|
min_rate_categories[raw_min_idx]++;
|
|
} else {
|
|
raw_value = 99;
|
|
for (region = 0; region < number_of_regions; region++) {
|
|
if (max_rate_categories[region] > 0) {
|
|
temp =
|
|
offset - absolute_region_power_index[region] -
|
|
2 * max_rate_categories[region];
|
|
if (temp < raw_value) {
|
|
raw_value = temp;
|
|
raw_max_idx = region;
|
|
}
|
|
}
|
|
}
|
|
|
|
*--max_rate_ptr = raw_max_idx;
|
|
max +=
|
|
expected_bits_table[max_rate_categories[raw_max_idx] - 1] -
|
|
expected_bits_table[max_rate_categories[raw_max_idx]];
|
|
max_rate_categories[raw_max_idx]--;
|
|
}
|
|
}
|
|
|
|
for (region = 0; region < number_of_regions; region++)
|
|
power_categories[region] = max_rate_categories[region];
|
|
|
|
for (i = 0; i < num_rate_control_possibilities - 1; i++)
|
|
category_balance[i] = *max_rate_ptr++;
|
|
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
Looks like the flag means what kind of encoding is used
|
|
for now, it looks like :
|
|
0 : the sample rate is not encoded in the frame
|
|
1 - 2 : the sample rate is fixed in the frame
|
|
3 : sample rate is variable and there is one for each frame
|
|
*/
|
|
|
|
int
|
|
GetSirenCodecInfo (int flag, int sample_rate, int *number_of_coefs,
|
|
int *sample_rate_bits, int *rate_control_bits,
|
|
int *rate_control_possibilities, int *checksum_bits, int *esf_adjustment,
|
|
int *scale_factor, int *number_of_regions, int *sample_rate_code,
|
|
int *bits_per_frame)
|
|
{
|
|
switch (flag) {
|
|
case 0:
|
|
*number_of_coefs = 320;
|
|
*sample_rate_bits = 0;
|
|
*rate_control_bits = 4;
|
|
*rate_control_possibilities = 16;
|
|
*checksum_bits = 0;
|
|
*esf_adjustment = 7;
|
|
*number_of_regions = 14;
|
|
*sample_rate_code = 0;
|
|
*scale_factor = 22;
|
|
break;
|
|
case 1:
|
|
*number_of_coefs = 320;
|
|
*sample_rate_bits = 2;
|
|
*rate_control_bits = 4;
|
|
*rate_control_possibilities = 16;
|
|
*checksum_bits = 4;
|
|
*esf_adjustment = -2;
|
|
*number_of_regions = 14;
|
|
*scale_factor = 1;
|
|
if (sample_rate == 16000)
|
|
*sample_rate_code = 1;
|
|
else if (sample_rate == 24000)
|
|
*sample_rate_code = 2;
|
|
else if (sample_rate == 32000)
|
|
*sample_rate_code = 3;
|
|
else
|
|
return 3;
|
|
break;
|
|
case 2:
|
|
*number_of_coefs = 640;
|
|
*sample_rate_bits = 2;
|
|
*rate_control_bits = 5;
|
|
*rate_control_possibilities = 32;
|
|
*checksum_bits = 4;
|
|
*esf_adjustment = 7;
|
|
*number_of_regions = 28;
|
|
*scale_factor = 33;
|
|
|
|
if (sample_rate == 24000)
|
|
*sample_rate_code = 1;
|
|
else if (sample_rate == 32000)
|
|
*sample_rate_code = 2;
|
|
else if (sample_rate == 48000)
|
|
*sample_rate_code = 3;
|
|
else
|
|
return 3;
|
|
|
|
break;
|
|
case 3:
|
|
*number_of_coefs = 640;
|
|
*sample_rate_bits = 6;
|
|
*rate_control_bits = 5;
|
|
*rate_control_possibilities = 32;
|
|
*checksum_bits = 4;
|
|
*esf_adjustment = 7;
|
|
*scale_factor = 33;
|
|
|
|
switch (sample_rate) {
|
|
case 8800:
|
|
*number_of_regions = 12;
|
|
*sample_rate_code = 59;
|
|
break;
|
|
case 9600:
|
|
*number_of_regions = 12;
|
|
*sample_rate_code = 1;
|
|
break;
|
|
case 10400:
|
|
*number_of_regions = 12;
|
|
*sample_rate_code = 13;
|
|
break;
|
|
case 10800:
|
|
*number_of_regions = 12;
|
|
*sample_rate_code = 14;
|
|
break;
|
|
case 11200:
|
|
*number_of_regions = 12;
|
|
*sample_rate_code = 15;
|
|
break;
|
|
case 11600:
|
|
*number_of_regions = 12;
|
|
*sample_rate_code = 16;
|
|
break;
|
|
case 12000:
|
|
*number_of_regions = 12;
|
|
*sample_rate_code = 2;
|
|
break;
|
|
case 12400:
|
|
*number_of_regions = 12;
|
|
*sample_rate_code = 17;
|
|
break;
|
|
case 12800:
|
|
*number_of_regions = 12;
|
|
*sample_rate_code = 18;
|
|
break;
|
|
case 13200:
|
|
*number_of_regions = 12;
|
|
*sample_rate_code = 19;
|
|
break;
|
|
case 13600:
|
|
*number_of_regions = 12;
|
|
*sample_rate_code = 20;
|
|
break;
|
|
case 14000:
|
|
*number_of_regions = 12;
|
|
*sample_rate_code = 21;
|
|
break;
|
|
case 14400:
|
|
*number_of_regions = 16;
|
|
*sample_rate_code = 3;
|
|
break;
|
|
case 14800:
|
|
*number_of_regions = 16;
|
|
*sample_rate_code = 22;
|
|
break;
|
|
case 15200:
|
|
*number_of_regions = 16;
|
|
*sample_rate_code = 23;
|
|
break;
|
|
case 15600:
|
|
*number_of_regions = 16;
|
|
*sample_rate_code = 24;
|
|
break;
|
|
case 16000:
|
|
*number_of_regions = 16;
|
|
*sample_rate_code = 25;
|
|
break;
|
|
case 16400:
|
|
*number_of_regions = 16;
|
|
*sample_rate_code = 26;
|
|
break;
|
|
case 16800:
|
|
*number_of_regions = 18;
|
|
*sample_rate_code = 4;
|
|
break;
|
|
case 17200:
|
|
*number_of_regions = 18;
|
|
*sample_rate_code = 27;
|
|
break;
|
|
case 17600:
|
|
*number_of_regions = 18;
|
|
*sample_rate_code = 28;
|
|
break;
|
|
case 18000:
|
|
*number_of_regions = 18;
|
|
*sample_rate_code = 29;
|
|
break;
|
|
case 18400:
|
|
*number_of_regions = 18;
|
|
*sample_rate_code = 30;
|
|
break;
|
|
case 18800:
|
|
*number_of_regions = 18;
|
|
*sample_rate_code = 31;
|
|
break;
|
|
case 19200:
|
|
*number_of_regions = 20;
|
|
*sample_rate_code = 5;
|
|
break;
|
|
case 19600:
|
|
*number_of_regions = 20;
|
|
*sample_rate_code = 32;
|
|
break;
|
|
case 20000:
|
|
*number_of_regions = 20;
|
|
*sample_rate_code = 33;
|
|
break;
|
|
case 20400:
|
|
*number_of_regions = 20;
|
|
*sample_rate_code = 34;
|
|
break;
|
|
case 20800:
|
|
*number_of_regions = 20;
|
|
*sample_rate_code = 35;
|
|
break;
|
|
case 21200:
|
|
*number_of_regions = 20;
|
|
*sample_rate_code = 36;
|
|
break;
|
|
case 21600:
|
|
*number_of_regions = 22;
|
|
*sample_rate_code = 6;
|
|
break;
|
|
case 22000:
|
|
*number_of_regions = 22;
|
|
*sample_rate_code = 37;
|
|
break;
|
|
case 22400:
|
|
*number_of_regions = 22;
|
|
*sample_rate_code = 38;
|
|
break;
|
|
case 22800:
|
|
*number_of_regions = 22;
|
|
*sample_rate_code = 39;
|
|
break;
|
|
case 23200:
|
|
*number_of_regions = 22;
|
|
*sample_rate_code = 40;
|
|
break;
|
|
case 23600:
|
|
*number_of_regions = 22;
|
|
*sample_rate_code = 41;
|
|
break;
|
|
case 24000:
|
|
*number_of_regions = 24;
|
|
*sample_rate_code = 7;
|
|
break;
|
|
case 24400:
|
|
*number_of_regions = 24;
|
|
*sample_rate_code = 42;
|
|
break;
|
|
case 24800:
|
|
*number_of_regions = 24;
|
|
*sample_rate_code = 43;
|
|
break;
|
|
case 25200:
|
|
*number_of_regions = 24;
|
|
*sample_rate_code = 44;
|
|
break;
|
|
case 25600:
|
|
*number_of_regions = 24;
|
|
*sample_rate_code = 45;
|
|
break;
|
|
case 26000:
|
|
*number_of_regions = 24;
|
|
*sample_rate_code = 46;
|
|
break;
|
|
case 26400:
|
|
*number_of_regions = 26;
|
|
*sample_rate_code = 8;
|
|
break;
|
|
case 26800:
|
|
*number_of_regions = 26;
|
|
*sample_rate_code = 47;
|
|
break;
|
|
case 27200:
|
|
*number_of_regions = 26;
|
|
*sample_rate_code = 48;
|
|
break;
|
|
case 27600:
|
|
*number_of_regions = 26;
|
|
*sample_rate_code = 49;
|
|
break;
|
|
case 28000:
|
|
*number_of_regions = 26;
|
|
*sample_rate_code = 50;
|
|
break;
|
|
case 28400:
|
|
*number_of_regions = 26;
|
|
*sample_rate_code = 51;
|
|
break;
|
|
case 28800:
|
|
*number_of_regions = 28;
|
|
*sample_rate_code = 9;
|
|
break;
|
|
case 29200:
|
|
*number_of_regions = 28;
|
|
*sample_rate_code = 52;
|
|
break;
|
|
case 29600:
|
|
*number_of_regions = 28;
|
|
*sample_rate_code = 53;
|
|
break;
|
|
case 30000:
|
|
*number_of_regions = 28;
|
|
*sample_rate_code = 54;
|
|
break;
|
|
case 30400:
|
|
*number_of_regions = 28;
|
|
*sample_rate_code = 55;
|
|
break;
|
|
case 30800:
|
|
*number_of_regions = 28;
|
|
*sample_rate_code = 56;
|
|
break;
|
|
case 31200:
|
|
*number_of_regions = 28;
|
|
*sample_rate_code = 10;
|
|
break;
|
|
case 31600:
|
|
*number_of_regions = 28;
|
|
*sample_rate_code = 57;
|
|
break;
|
|
case 32000:
|
|
*number_of_regions = 28;
|
|
*sample_rate_code = 58;
|
|
break;
|
|
default:
|
|
return 3;
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
return 6;
|
|
}
|
|
|
|
*bits_per_frame = sample_rate / 50;
|
|
return 0;
|
|
}
|