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
|
/* ------------------------------------------------------------------
* 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.
* -------------------------------------------------------------------
*/
/*
Pathname: window_block_fxp.h
------------------------------------------------------------------------------
REVISION HISTORY
Description:
modified function definition: Time_data from Int to Int32
change wnd_shape from structure to passing parameters
delete definition of wnd_shape1, not needed.
Description: Modified based on unit test comments
Description: Change copyright, add () around constants.
Description:
changed Long_Window_fxp and Short _Window_fxp tables definition, from
"const UInt16 *" to "const UInt16 * const" to avoid global variable
definition.
Description: Updated function trans4m_freq_2_time_fxp definition
Description: Modified function interface to add output_buffer
Description:
------------------------------------------------------------------------------
INCLUDE DESCRIPTION
Header file for window and block switch
------------------------------------------------------------------------------
REFERENCES
(1) ISO/IEC 13818-7 Part 7: Advanced Audo Coding (AAC)
(2) MPEG-2 NBC Audio Decoder
"This software module was originally developed by AT&T, Dolby
Laboratories, Fraunhofer Gesellschaft IIS in the course of development
of the MPEG-2 NBC/MPEG-4 Audio standard ISO/IEC 13818-7, 14496-1,2 and
3. This software module is an implementation of a part of one or more
MPEG-2 NBC/MPEG-4 Audio tools as specified by the MPEG-2 NBC/MPEG-4
Audio standard. ISO/IEC gives users of the MPEG-2 NBC/MPEG-4 Audio
standards free license to this software module or modifications thereof
for use in hardware or software products claiming conformance to the
MPEG-2 NBC/MPEG-4 Audio standards. Those intending to use this software
module in hardware or software products are advised that this use may
infringe existing patents. The original developer of this software
module and his/her company, the subsequent editors and their companies,
and ISO/IEC have no liability for use of this software module or
modifications thereof in an implementation. Copyright is not released
for non MPEG-2 NBC/MPEG-4 Audio conforming products.The original
developer retains full right to use the code for his/her own purpose,
assign or donate the code to a third party and to inhibit third party
from using the code for non MPEG-2 NBC/MPEG-4 Audio conforming products.
This copyright notice must be included in all copies or derivative
works."
Copyright(c)1996.
------------------------------------------------------------------------------
*/
/*----------------------------------------------------------------------------
; CONTINUE ONLY IF NOT ALREADY DEFINED
----------------------------------------------------------------------------*/
#ifndef WINDOW_BLOCK_FXP_H
#define WINDOW_BLOCK_FXP_H
/*----------------------------------------------------------------------------
; INCLUDES
----------------------------------------------------------------------------*/
#include "pv_audio_type_defs.h"
#include "e_window_shape.h"
#include "e_window_sequence.h"
/*----------------------------------------------------------------------------
; MACROS
; Define module specific macros here
----------------------------------------------------------------------------*/
#ifdef __cplusplus
extern "C"
{
#endif
/*----------------------------------------------------------------------------
; DEFINES
; Include all pre-processor statements here.
----------------------------------------------------------------------------*/
#define LONG_WINDOW (1024)
#define SHORT_WINDOW (128)
#define HALF_LONG_WINDOW (LONG_WINDOW>>1)
#define HALF_SHORT_WINDOW (SHORT_WINDOW>>1)
#define NUM_SHORT_WINDOWS (8)
#define LONG_WINDOW_m_1 (LONG_WINDOW-1)
#define SHORT_WINDOW_m_1 (SHORT_WINDOW-1)
/*
* Limits for window sequences, they are used to build
* each long window, they are defined in the standards
*/
#define W_L_START_1 ((3*LONG_WINDOW - SHORT_WINDOW)>>1)
#define W_L_START_2 ((3*LONG_WINDOW + SHORT_WINDOW)>>1)
#define W_L_STOP_1 ((LONG_WINDOW - SHORT_WINDOW)>>1)
#define W_L_STOP_2 ((LONG_WINDOW + SHORT_WINDOW)>>1)
#define LONG_BLOCK1 (2*LONG_WINDOW)
#define SHORT_BLOCK1 (2*SHORT_WINDOW)
#define SCALING 10
#define ROUNDING (1<<(SCALING-1))
/*----------------------------------------------------------------------------
; EXTERNAL VARIABLES REFERENCES
; Declare variables used in this module but defined elsewhere
----------------------------------------------------------------------------*/
extern const Int16 Short_Window_KBD_fxp[ SHORT_WINDOW];
extern const Int16 Long_Window_KBD_fxp[ LONG_WINDOW];
extern const Int16 Short_Window_sine_fxp[ SHORT_WINDOW];
extern const Int16 Long_Window_sine_fxp[ LONG_WINDOW];
extern const Int16 * const Long_Window_fxp[];
extern const Int16 * const Short_Window_fxp[];
/*----------------------------------------------------------------------------
; SIMPLE TYPEDEF'S
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; ENUMERATED TYPEDEF'S
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; STRUCTURES TYPEDEF'S
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; GLOBAL FUNCTION DEFINITIONS
; Function Prototype declaration
----------------------------------------------------------------------------*/
void trans4m_freq_2_time_fxp(
Int32 Frequency_data[],
Int32 Time_data[],
#ifdef AAC_PLUS
Int32 Output_buffer[],
#else
Int16 Output_buffer[],
#endif
WINDOW_SEQUENCE wnd_seq,
Int wnd_shape_prev_bk,
Int wnd_shape_this_bk,
Int Q_format,
Int32 abs_max_per_window[],
Int32 freq_2_time_buffer[] ,
Int16 *Interleave_output
);
void trans4m_freq_2_time_fxp_1(
Int32 Frequency_data[],
Int32 Time_data[],
Int16 Output_buffer[],
WINDOW_SEQUENCE wnd_seq,
Int wnd_shape_prev_bk,
Int wnd_shape_this_bk,
Int Q_format,
Int32 abs_max_per_window[],
Int32 freq_2_time_buffer[]
);
void trans4m_freq_2_time_fxp_2(
Int32 Frequency_data[],
Int32 Time_data[],
WINDOW_SEQUENCE wnd_seq,
Int wnd_shape_prev_bk,
Int wnd_shape_this_bk,
Int Q_format,
Int32 abs_max_per_window[],
Int32 freq_2_time_buffer[] ,
Int16 *Interleave_output
);
void trans4m_time_2_freq_fxp(
Int32 Time2Freq_data[],
WINDOW_SEQUENCE wnd_seq,
Int wnd_shape_prev_bk,
Int wnd_shape_this_bk,
Int *pQ_format,
Int32 mem_4_in_place_FFT[]);
/*----------------------------------------------------------------------------
; END
----------------------------------------------------------------------------*/
#ifdef __cplusplus
}
#endif
#endif /* WINDOW_BLOCK_FXP_H */
|
