1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
|
/* ------------------------------------------------------------------
* Copyright (C) 1998-2009 PacketVideo
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied.
* See the License for the specific language governing permissions
* and limitations under the License.
* -------------------------------------------------------------------
*/
/****************************************************************************************
Portions of this file are derived from the following 3GPP standard:
3GPP TS 26.173
ANSI-C code for the Adaptive Multi-Rate - Wideband (AMR-WB) speech codec
Available from http://www.3gpp.org
(C) 2007, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC)
Permission to distribute, modify and use this file under the standard license
terms listed above has been obtained from the copyright holder.
****************************************************************************************/
/*
------------------------------------------------------------------------------
Filename: band_pass_6k_7k.cpp
Date: 05/08/2004
------------------------------------------------------------------------------
REVISION HISTORY
Description:
------------------------------------------------------------------------------
INPUT AND OUTPUT DEFINITIONS
int16 signal[], input signal / output is divided by 16
int16 lg, lenght of signal
int16 mem[] in/out: memory (size=30)
int16 x[] scratch mem ( size= 60)
------------------------------------------------------------------------------
FUNCTION DESCRIPTION
15th order band pass 6kHz to 7kHz FIR filter.
frequency: 4kHz 5kHz 5.5kHz 6kHz 6.5kHz 7kHz 7.5kHz 8kHz
dB loss: -60dB -45dB -13dB -3dB 0dB -3dB -13dB -45dB
------------------------------------------------------------------------------
REQUIREMENTS
------------------------------------------------------------------------------
REFERENCES
------------------------------------------------------------------------------
PSEUDO-CODE
------------------------------------------------------------------------------
*/
/*----------------------------------------------------------------------------
; INCLUDES
----------------------------------------------------------------------------*/
#include "pv_amr_wb_type_defs.h"
#include "pvamrwbdecoder_basic_op.h"
#include "pvamrwbdecoder_acelp.h"
#include "pvamrwbdecoder_cnst.h"
/*----------------------------------------------------------------------------
; MACROS
; Define module specific macros here
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; DEFINES
; Include all pre-processor statements here. Include conditional
; compile variables also.
----------------------------------------------------------------------------*/
#define L_FIR 30
/*----------------------------------------------------------------------------
; LOCAL FUNCTION DEFINITIONS
; Function Prototype declaration
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; LOCAL STORE/BUFFER/POINTER DEFINITIONS
; Variable declaration - defined here and used outside this module
----------------------------------------------------------------------------*/
/* filter coefficients (gain=4.0) */
const int16 fir_6k_7k[L_FIR] =
{
-32, 47, 32, -27,
-369, 1122, -1421, 0,
3798, -8880, 12349, -10984,
3548, 7766, -18001,
22118,
-18001, 7766, 3548, -10984,
12349, -8880, 3798, 0,
-1421, 1122, -369, -27,
32, 47
};
/*----------------------------------------------------------------------------
; EXTERNAL FUNCTION REFERENCES
; Declare functions defined elsewhere and referenced in this module
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES
; Declare variables used in this module but defined elsewhere
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; FUNCTION CODE
----------------------------------------------------------------------------*/
void band_pass_6k_7k_init(int16 mem[]) /* mem[30] */
{
pv_memset((void *)mem, 0, L_FIR*sizeof(*mem));
}
/*----------------------------------------------------------------------------
; FUNCTION CODE
----------------------------------------------------------------------------*/
void band_pass_6k_7k(
int16 signal[], /* input: signal */
int16 lg, /* input: length of input */
int16 mem[], /* in/out: memory (size=30) */
int16 x[]
)
{
int16 i, j;
int32 L_tmp1;
int32 L_tmp2;
int32 L_tmp3;
int32 L_tmp4;
int16 *pt_sign = signal;
pv_memcpy((void *)x, (void *)mem, L_FIR*sizeof(*x));
for (i = 0; i < lg >> 2; i++)
{
x[(i<<2) + L_FIR ] = *(pt_sign) >> 2; /* gain of filter = 4 */
x[(i<<2) + L_FIR + 1] = *(pt_sign + 1) >> 2; /* gain of filter = 4 */
x[(i<<2) + L_FIR + 2] = *(pt_sign + 2) >> 2; /* gain of filter = 4 */
x[(i<<2) + L_FIR + 3] = *(pt_sign + 3) >> 2; /* gain of filter = 4 */
L_tmp1 = 0x00004000;
L_tmp2 = 0x00004000;
L_tmp3 = 0x00004000;
L_tmp4 = 0x00004000;
L_tmp1 -= ((int32)x[(i<<2)+L_FIR ] << 5);
L_tmp2 -= ((int32)x[(i<<2)+L_FIR+1] << 5);
L_tmp3 -= ((int32)x[(i<<2)+L_FIR+2] << 5);
L_tmp4 -= ((int32)x[(i<<2)+L_FIR+3] << 5);
L_tmp1 -= ((int32)x[(i<<2)] << 5);
L_tmp2 -= ((int32)x[(i<<2)+1] << 5);
L_tmp3 -= ((int32)x[(i<<2)+2] << 5);
L_tmp4 -= ((int32)x[(i<<2)+3] << 5);
for (j = 1; j < L_FIR - 1; j += 4)
{
int16 tmp1 = x[(i<<2)+j ];
int16 tmp2 = x[(i<<2)+j+1];
int16 tmp3 = x[(i<<2)+j+2];
L_tmp1 = fxp_mac_16by16(tmp1, fir_6k_7k[j ], L_tmp1);
L_tmp2 = fxp_mac_16by16(tmp2, fir_6k_7k[j ], L_tmp2);
L_tmp1 = fxp_mac_16by16(tmp2, fir_6k_7k[j+1], L_tmp1);
L_tmp2 = fxp_mac_16by16(tmp3, fir_6k_7k[j+1], L_tmp2);
L_tmp3 = fxp_mac_16by16(tmp3, fir_6k_7k[j ], L_tmp3);
L_tmp1 = fxp_mac_16by16(tmp3, fir_6k_7k[j+2], L_tmp1);
tmp1 = x[(i<<2)+j+3];
tmp2 = x[(i<<2)+j+4];
L_tmp2 = fxp_mac_16by16(tmp1, fir_6k_7k[j+2], L_tmp2);
L_tmp4 = fxp_mac_16by16(tmp1, fir_6k_7k[j ], L_tmp4);
L_tmp3 = fxp_mac_16by16(tmp1, fir_6k_7k[j+1], L_tmp3);
L_tmp1 = fxp_mac_16by16(tmp1, fir_6k_7k[j+3], L_tmp1);
L_tmp2 = fxp_mac_16by16(tmp2, fir_6k_7k[j+3], L_tmp2);
L_tmp4 = fxp_mac_16by16(tmp2, fir_6k_7k[j+1], L_tmp4);
L_tmp3 = fxp_mac_16by16(tmp2, fir_6k_7k[j+2], L_tmp3);
tmp1 = x[(i<<2)+j+5];
tmp2 = x[(i<<2)+j+6];
L_tmp4 = fxp_mac_16by16(tmp1, fir_6k_7k[j+2], L_tmp4);
L_tmp3 = fxp_mac_16by16(tmp1, fir_6k_7k[j+3], L_tmp3);
L_tmp4 = fxp_mac_16by16(tmp2, fir_6k_7k[j+3], L_tmp4);
}
L_tmp1 = fxp_mac_16by16(x[(i<<2)+j ], fir_6k_7k[L_FIR-1 ], L_tmp1);
L_tmp2 = fxp_mac_16by16(x[(i<<2)+j+1], fir_6k_7k[L_FIR-1 ], L_tmp2);
L_tmp3 = fxp_mac_16by16(x[(i<<2)+j+2], fir_6k_7k[L_FIR-1 ], L_tmp3);
L_tmp4 = fxp_mac_16by16(x[(i<<2)+j+3], fir_6k_7k[L_FIR-1 ], L_tmp4);
*(pt_sign++) = (int16)(L_tmp1 >> 15);
*(pt_sign++) = (int16)(L_tmp2 >> 15);
*(pt_sign++) = (int16)(L_tmp3 >> 15);
*(pt_sign++) = (int16)(L_tmp4 >> 15);
}
pv_memcpy((void *)mem, (void *)(x + lg), L_FIR*sizeof(*mem));
}
|
