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
|
@***********************************************************
@ File: ARM_synth_constants.inc
@ Processor: ARM
@ Description: Contains constants and defines, most of which
@ are mirrored in synth.h
@
@ Copyright Sonic Network Inc. 2004
@****************************************************************
@ Revision Control:
@ $Revision: 741 $
@ $Date: 2007-06-22 16:39:21 -0700 (Fri, 22 Jun 2007) $
@****************************************************************
.ifdef SAMPLE_RATE_8000
.equ SYNTH_UPDATE_PERIOD_IN_BITS, 5
.equ BUFFER_SIZE_IN_MONO_SAMPLES, 32
.endif
.ifdef SAMPLE_RATE_16000
.equ SYNTH_UPDATE_PERIOD_IN_BITS, 6
.equ BUFFER_SIZE_IN_MONO_SAMPLES, 64
.endif
.ifdef SAMPLE_RATE_20000
.equ SYNTH_UPDATE_PERIOD_IN_BITS, 7
.equ BUFFER_SIZE_IN_MONO_SAMPLES, 128
.endif
.ifdef SAMPLE_RATE_22050
.equ SYNTH_UPDATE_PERIOD_IN_BITS, 7
.equ BUFFER_SIZE_IN_MONO_SAMPLES, 128
.endif
.ifdef SAMPLE_RATE_24000
.equ SYNTH_UPDATE_PERIOD_IN_BITS, 7
.equ BUFFER_SIZE_IN_MONO_SAMPLES, 128
.endif
.ifdef SAMPLE_RATE_32000
.equ SYNTH_UPDATE_PERIOD_IN_BITS, 7
.equ BUFFER_SIZE_IN_MONO_SAMPLES, 128
.endif
.ifdef SAMPLE_RATE_44100
.equ SYNTH_UPDATE_PERIOD_IN_BITS, 8
.equ BUFFER_SIZE_IN_MONO_SAMPLES, 256
.endif
.ifdef SAMPLE_RATE_48000
.equ SYNTH_UPDATE_PERIOD_IN_BITS, 8
.equ BUFFER_SIZE_IN_MONO_SAMPLES, 256
.endif
@ if the OUTPUT PCM sample is 16-bits, then when using indexed addressing,
@ the next sample is this many bytes away
.equ NEXT_OUTPUT_PCM, 2
@****************************************************************************
@/* macros for fractional phase accumulator */
.equ NUM_PHASE_FRAC_BITS, 15
.equ PHASE_FRAC_MASK, 0x7FFF
@ shift for phase accumulator when fraction carries over
.ifdef SAMPLES_8_BIT
.equ NEXT_INPUT_PCM_SHIFT, 0
.endif
.ifdef SAMPLES_16_BIT
.equ NEXT_INPUT_PCM_SHIFT, 1
.endif
@****************************************************************************
.equ NUM_MIXER_GUARD_BITS, 4
@****************************************************************************
@/* Envelope 1 (EG1) calculation macros */
.equ NUM_EG1_FRAC_BITS, 15
@****************************************************************************
.equ NUM_ENHANCER_FILTER_COEF_FRAC_BITS, 5
@****************************************************************************
@
@ I've temporarily given up on the idea of getting ADS/RV and gcc to
@ handle a struct in a compatible fashion. Switching to old fashion EQU
@
.if FILTER_ENABLED
@**************************************
@ typedef struct s_filter_tag
.equ m_z1, 0
.equ m_z2, 2
.endif
@**************************************
@ typedef struct s_wt_frame_tag
.equ m_gainTarget, 0
.equ m_phaseIncrement, 4
.if FILTER_ENABLED
.equ m_k, 8
.equ m_b1, 12
.equ m_b2, 16
.equ m_pAudioBuffer, 20
.equ m_pMixBuffer, 24
.equ m_numSamples, 28
.equ m_prevGain, 32
.else
.equ m_pAudioBuffer, 8
.equ m_pMixBuffer, 12
.equ m_numSamples, 16
.equ m_prevGain, 20
.endif
@**************************************
@ typedef struct s_wt_voice_tag
.equ m_pLoopEnd, 0 @ /* points to last PCM sample (not 1 beyond last) */
.equ m_pLoopStart, 4 @ /* points to first sample at start of loop */
.equ m_pPhaseAccum, 8 @ /* points to first sample at start of loop */
.equ m_phaseFrac, 12 @ /* points to first sample at start of loop */
.if STEREO_OUTPUT
.equ m_gainLeft, 16 @ /* current gain, left ch */
.equ m_gainRight, 18 @ /* current gain, right ch */
.endif
@****************************************************************************
@ enhancer
.equ m_nEnhancerFeedForward1, 0
.equ m_nEnhancerFeedback1, 1
.equ m_nDriveCoef, 2
.equ m_nEnhancerFeedback2, 3
.equ m_nWet, 4
.equ m_nDry, 5
.equ m_zF0L, 6 @ filter 1 zero state var, left
.equ m_zF1L, 8 @ filter 1 pole state var, left
.equ m_zF2L, 10 @ filter 2 zero state var, left
.equ m_zF0R, 12 @ filter 1 zero state var, right
.equ m_zF1R, 14 @ filter 1 pole state var, right
.equ m_zF2R, 16 @ filter 2 zero state var, right
@****************************************************************************
|
