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
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
|
/*
* Copyright (C) 2004-2010 NXP Software
* Copyright (C) 2010 The Android Open Source Project
*
* 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.
*/
/************************************************************************************
$Author: beq07716 $
$Revision: 1001 $
$Date: 2010-06-28 13:23:02 +0200 (Mon, 28 Jun 2010) $
*************************************************************************************/
/************************************************************************************/
/* */
/* Includes */
/* */
/************************************************************************************/
#include "LVCS.h"
#include "LVCS_Private.h"
#include "VectorArithmetic.h"
#include "CompLim.h"
/************************************************************************************/
/* */
/* FUNCTION: LVCS_Process_CS */
/* */
/* DESCRIPTION: */
/* Process function for the Concert Sound module based on the following block */
/* diagram: */
/* _________ ________ _____ _______ ___ ______ */
/* | | | | | | | | | | | | */
/* ----->| Stereo |->| Reverb |->| Equ |->| Alpha |-->| + |-| Gain |----> */
/* | | Enhance | |________| |_____| |_______| |___| |______| */
/* | |_________| | */
/* | ___________ | */
/* | | | | */
/* |------------------------------->| 1 - Alpha |-----| */
/* |___________| */
/* */
/* The Stereo Enhancer, Reverb and Equaliser blocks are each configured to have */
/* their gain to give a near peak to peak output (-0.1dBFS) with a worst case */
/* input signal. The gains of these blocks are re-combined in the Alpha mixer and */
/* the gain block folloing the sum. */
/* */
/* The processing uses the output buffer for data storage after each processing */
/* block. When processing is inplace a copy of the input signal is made in scratch */
/* memory for the 1-Alpha path. */
/* */
/* */
/* PARAMETERS: */
/* hInstance Instance handle */
/* pInData Pointer to the input data */
/* pOutData Pointer to the output data */
/* NumSamples Number of samples in the input buffer */
/* */
/* RETURNS: */
/* LVCS_Success Succeeded */
/* */
/* NOTES: */
/* */
/************************************************************************************/
LVCS_ReturnStatus_en LVCS_Process_CS(LVCS_Handle_t hInstance,
const LVM_INT16 *pInData,
LVM_INT16 *pOutData,
LVM_UINT16 NumSamples)
{
const LVM_INT16 *pInput;
LVCS_Instance_t *pInstance = (LVCS_Instance_t *)hInstance;
LVM_INT16 *pScratch = (LVM_INT16 *)pInstance->MemoryTable.Region[LVCS_MEMREGION_TEMPORARY_FAST].pBaseAddress;
LVCS_ReturnStatus_en err;
/*
* Check if the processing is inplace
*/
if (pInData == pOutData)
{
/* Processing inplace */
pInput = pScratch + (2*NumSamples);
Copy_16((LVM_INT16 *)pInData, /* Source */
(LVM_INT16 *)pInput, /* Destination */
(LVM_INT16)(2*NumSamples)); /* Left and right */
}
else
{
/* Processing outplace */
pInput = pInData;
}
/*
* Call the stereo enhancer
*/
err=LVCS_StereoEnhancer(hInstance, /* Instance handle */
pInData, /* Pointer to the input data */
pOutData, /* Pointer to the output data */
NumSamples); /* Number of samples to process */
/*
* Call the reverb generator
*/
err=LVCS_ReverbGenerator(hInstance, /* Instance handle */
pOutData, /* Pointer to the input data */
pOutData, /* Pointer to the output data */
NumSamples); /* Number of samples to process */
/*
* Call the equaliser
*/
err=LVCS_Equaliser(hInstance, /* Instance handle */
pOutData, /* Pointer to the input data */
NumSamples); /* Number of samples to process */
/*
* Call the bypass mixer
*/
err=LVCS_BypassMixer(hInstance, /* Instance handle */
pOutData, /* Pointer to the processed data */
pInput, /* Pointer to the input (unprocessed) data */
pOutData, /* Pointer to the output data */
NumSamples); /* Number of samples to process */
if(err !=LVCS_SUCCESS)
{
return err;
}
return(LVCS_SUCCESS);
}
/************************************************************************************/
/* */
/* FUNCTION: LVCS_Process */
/* */
/* DESCRIPTION: */
/* Process function for the Concert Sound module. The implementation supports two */
/* variants of the algorithm, one for headphones and one for mobile speakers. */
/* */
/* Data can be processed in two formats, stereo or mono-in-stereo. Data in mono */
/* format is not supported, the calling routine must convert the mono stream to */
/* mono-in-stereo. */
/* */
/* */
/* PARAMETERS: */
/* hInstance Instance handle */
/* pInData Pointer to the input data */
/* pOutData Pointer to the output data */
/* NumSamples Number of samples in the input buffer */
/* */
/* RETURNS: */
/* LVCS_Success Succeeded */
/* LVCS_TooManySamples NumSamples was larger than the maximum block size */
/* */
/* NOTES: */
/* */
/************************************************************************************/
LVCS_ReturnStatus_en LVCS_Process(LVCS_Handle_t hInstance,
const LVM_INT16 *pInData,
LVM_INT16 *pOutData,
LVM_UINT16 NumSamples)
{
LVCS_Instance_t *pInstance =(LVCS_Instance_t *)hInstance;
LVCS_ReturnStatus_en err;
/*
* Check the number of samples is not too large
*/
if (NumSamples > pInstance->Capabilities.MaxBlockSize)
{
return(LVCS_TOOMANYSAMPLES);
}
/*
* Check if the algorithm is enabled
*/
if (pInstance->Params.OperatingMode != LVCS_OFF)
{
/*
* Call CS process function
*/
err=LVCS_Process_CS(hInstance,
pInData,
pOutData,
NumSamples);
/*
* Compress to reduce expansion effect of Concert Sound and correct volume
* differences for difference settings. Not applied in test modes
*/
if ((pInstance->Params.OperatingMode == LVCS_ON)&&(pInstance->Params.CompressorMode == LVM_MODE_ON))
{
LVM_INT16 Gain = pInstance->VolCorrect.CompMin;
LVM_INT32 Current1;
Current1 = LVC_Mixer_GetCurrent(&pInstance->BypassMix.Mixer_Instance.MixerStream[0]);
Gain = (LVM_INT16)( pInstance->VolCorrect.CompMin
- (((LVM_INT32)pInstance->VolCorrect.CompMin * (Current1)) >> 15)
+ (((LVM_INT32)pInstance->VolCorrect.CompFull * (Current1)) >> 15) );
NonLinComp_D16(Gain, /* Compressor gain setting */
pOutData,
pOutData,
(LVM_INT32)(2*NumSamples));
}
if(pInstance->bInOperatingModeTransition == LVM_TRUE){
/*
* Re-init bypass mix when timer has completed
*/
if ((pInstance->bTimerDone == LVM_TRUE) &&
(pInstance->BypassMix.Mixer_Instance.MixerStream[1].CallbackSet == 0))
{
err=LVCS_BypassMixInit(hInstance,
&pInstance->Params);
if(err != LVCS_SUCCESS)
{
return err;
}
}
else{
LVM_Timer ( &pInstance->TimerInstance,
(LVM_INT16)NumSamples);
}
}
}
else
{
if (pInData != pOutData)
{
/*
* The algorithm is disabled so just copy the data
*/
Copy_16((LVM_INT16 *)pInData, /* Source */
(LVM_INT16 *)pOutData, /* Destination */
(LVM_INT16)(2*NumSamples)); /* Left and right */
}
}
return(LVCS_SUCCESS);
}
|
