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
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1">
<title>Graphic Equalizer 2: C:/Project Marcel & Oliver/Graphic_Equalizer/src/runfft.hcc Source File</title>
<link href="doxygen.css" rel="stylesheet" type="text/css">
</head><body>
<!-- Generated by Doxygen 1.3.9.1 -->
<div class="qindex"><a class="qindex" href="main.html">Main Page</a> | <a class="qindex" href="annotated.html">Data Structures</a> | <a class="qindex" href="dirs.html">Directories</a> | <a class="qindex" href="files.html">File List</a> | <a class="qindex" href="functions.html">Data Fields</a> | <a class="qindex" href="globals.html">Globals</a></div>
<div class="nav">
<a class="el" href="dir_000000.html">C:</a> / <a class="el" href="dir_000001.html">Project Marcel & Oliver</a> / <a class="el" href="dir_000002.html">Graphic_Equalizer</a> / <a class="el" href="dir_000004.html">src</a></div>
<h1>runfft.hcc</h1><a href="runfft_8hcc.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment">00001
00020 <span class="preprocessor">#include <stdlib.hch></span>
00021 <span class="preprocessor">#include "pal_master.hch"</span>
00022
00023 <span class="preprocessor">#include "<a class="code" href="configuration_8hch.html">configuration.hch</a>"</span>
00024 <span class="preprocessor">#if USE_RUNFFT</span>
00025 <span class="preprocessor"></span><span class="preprocessor">#include "<a class="code" href="audio_8hch.html">audio.hch</a>"</span>
00026 <span class="preprocessor">#include "<a class="code" href="fft_8hch.html">fft.hch</a>"</span>
00027
00028 <span class="preprocessor">#if HAVE_DEBUG</span>
00029 <span class="preprocessor"></span><span class="preprocessor"> #include "debug.hch"</span>
00030 <span class="preprocessor">#endif</span>
00031 <span class="preprocessor"></span>
00032 <span class="comment">/*</span>
00033 <span class="comment"> * Forward declarations</span>
00034 <span class="comment"> */</span>
00035 <span class="keyword">static</span> macro expr ClockRate = PAL_ACTUAL_CLOCK_RATE;
00036 <span class="preprocessor">#if HARDWARE_MULTIPLY</span>
00037 <span class="preprocessor"></span><span class="comment">//input buffer</span>
00038 ram <span class="keywordtype">signed</span> 18 audio_buffer_in[256] with { block = <span class="stringliteral">"BlockRAM"</span>};
00039 <span class="comment">//output buffer</span>
00040 ram <span class="keywordtype">signed</span> 18 audio_buffer_out[128] with { block = <span class="stringliteral">"BlockRAM"</span>};
00041 <span class="preprocessor">#else</span>
00042 <span class="preprocessor"></span><span class="comment">//input buffer</span>
00043 ram <span class="keywordtype">signed</span> 16 audio_buffer_in[256] with { block = <span class="stringliteral">"BlockRAM"</span>};
00044 <span class="comment">//output buffer</span>
00045 ram <span class="keywordtype">signed</span> 16 audio_buffer_out[128] with { block = <span class="stringliteral">"BlockRAM"</span>};
00046 <span class="preprocessor">#endif</span>
00047 <span class="preprocessor"></span><span class="comment">//EQ settings for the FFT</span>
00048 ram <span class="keywordtype">unsigned</span> 4 EQ_info[128] with { block = <span class="stringliteral">"BlockRAM"</span>};
00049 <span class="comment">//EQ settings received from the display</span>
00050
00051
00052 <span class="preprocessor">#if HARDWARE_MULTIPLY</span>
00053 <span class="preprocessor"></span><span class="keywordtype">signed</span> 18 *audioptr_in1,*audioptr_in2,*audioptr_in3,*audioptr_in4;
00054
00055 <span class="keywordtype">signed</span> 18 *audioptr_out1,*audioptr_out2;
00056
00057 <span class="keywordtype">unsigned</span> 6 *displayptr1,*displayptr2,*displayptr3,*displayptr4;
00058 <span class="preprocessor">#else</span>
00059 <span class="preprocessor"></span><span class="keywordtype">signed</span> 16 *audioptr_in1,*audioptr_in2,*audioptr_in3,*audioptr_in4;
00060
00061 <span class="keywordtype">signed</span> 16 *audioptr_out1,*audioptr_out2;
00062
00063 <span class="keywordtype">unsigned</span> 6 *displayptr1,*displayptr2,*displayptr3,*displayptr4;
00064 <span class="preprocessor">#endif</span>
00065 <span class="preprocessor"></span>
00076 macro proc <a class="code" href="audio_8hcc.html#a1">audio_main</a>(audiodata, AUDIOIN, AUDIOOUT)
00077 {
00078 <span class="keywordtype">signed</span> 18 sample;
00079 <span class="keywordtype">unsigned</span> 6 sample_count;
00080 <span class="keywordtype">unsigned</span> 8 i,cycle;
00081 <span class="keywordtype">unsigned</span> 4 eqinfo;
00082
00083 <span class="keywordtype">unsigned</span> 1 FFT_Sync, first;
00084 macro expr OW = PalAudioOutGetMaxDataWidthCT ();
00085 macro expr IW = PalAudioInGetMaxDataWidthCT ();
00086 <span class="keywordtype">signed</span> LeftNew, RightNew;
00087 <span class="keywordtype">signed</span> Output_sample;
00088
00089 ram <span class="keywordtype">unsigned</span> 6 input[64];
00090
00091 <span class="comment">//pointers for double and quadruple buffering:</span>
00092 audioptr_in1 = &audio_buffer_in[0];
00093 audioptr_in2 = &audio_buffer_in[64];
00094 audioptr_in3 = &audio_buffer_in[128];
00095 audioptr_in4 = &audio_buffer_in[192];
00096
00097 audioptr_out1 = &audio_buffer_out[0];
00098 audioptr_out2 = &audio_buffer_out[64];
00099
00100 displayptr1 = &audiodata.ifft_info.write[0];
00101 displayptr2 = &audiodata.ifft_info.write[64];
00102 displayptr3 = &audiodata.ifft_info.write[128];
00103 displayptr4 = &audiodata.ifft_info.write[192];
00104
00105 FFT_Sync=0;
00106 par
00107 {
00108 <span class="keywordflow">for</span>(;;)
00109 {
00110 <span class="keywordflow">if</span> (FFT_Sync) <span class="comment">//if 64 samples are read from ADC...</span>
00111 {
00112 par
00113 {
00114 <span class="comment">// switch pointers </span>
00115 audioptr_in1 = audioptr_in2;
00116 audioptr_in2 = audioptr_in3;
00117 audioptr_in3 = audioptr_in4;
00118 audioptr_in4 = audioptr_in1;
00119
00120 audioptr_out1 = audioptr_out2;
00121 audioptr_out2 = audioptr_out1;
00122
00123 displayptr1=displayptr2;
00124 displayptr2=displayptr3;
00125 displayptr3=displayptr4;
00126 displayptr4=displayptr1;
00127
00128 FFT_Sync = 0;
00129 }
00130
00131 <span class="comment">// FFT calculation</span>
00132 <a class="code" href="fft_8hcc.html#a4">perform_fft</a>(audioptr_in1);
00133
00134 <span class="preprocessor">#if PERFORM_FFT_CALCULATION</span>
00135 <span class="preprocessor"></span> <a class="code" href="fft_8hcc.html#a6">equalize_audio</a>(&audiodata);
00136 <span class="preprocessor">#endif</span>
00137 <span class="preprocessor"></span> <span class="comment">// inverse FFT calculation</span>
00138 <a class="code" href="fft_8hcc.html#a5">perform_ifft</a>(audioptr_out1,displayptr1);
00139 }
00140 <span class="keywordflow">else</span>
00141 delay;
00142 }
00143
00144 <span class="keywordflow">for</span>(sample_count=0;;)<span class="comment">//store the samples in the inputbuffer</span>
00145 {
00146 <span class="keywordflow">if</span> (!FFT_Sync)
00147 {
00148 par
00149 {
00150 seq
00151 {
00152 PalAudioInRead(AUDIOIN, &LeftNew, &RightNew);
00153 <span class="preprocessor">#if HARDWARE_MULTIPLY </span>
00154 <span class="preprocessor"></span> audioptr_in1[sample_count] = LeftNew;<span class="comment">//drop 2 LSB's</span>
00155 <span class="preprocessor">#else</span>
00156 <span class="preprocessor"></span> audioptr_in1[sample_count] = (LeftNew\\2);<span class="comment">//drop 2 LSB's</span>
00157 <span class="preprocessor">#endif</span>
00158 <span class="preprocessor"></span> sample_count++;
00159 <span class="keywordflow">if</span> (!sample_count)
00160 {
00161 FFT_Sync = 1;
00162 }
00163 }
00164 seq
00165 {
00166 Output_sample = audioptr_out2[sample_count];
00167 }
00168 }
00169 }
00170 <span class="keywordflow">else</span>
00171 {
00172 delay;
00173 }
00174 }
00175 <span class="keywordflow">for</span>(;;)
00176 {
00177 PalAudioOutWrite(AUDIOOUT,(<span class="keywordtype">signed</span> OW)(Output_sample @ 0),(<span class="keywordtype">signed</span> OW)(Output_sample @ 0));
00178 }
00179 }<span class="comment">//end par</span>
00180 }<span class="comment">// end function</span>
00181 <span class="preprocessor">#endif</span>
00182 <span class="preprocessor"></span>
</pre></div><hr size="1"><address style="align: right;"><small>Generated on Thu Dec 9 14:37:07 2004 for Graphic Equalizer 2 by
<a href="http://www.doxygen.org/index.html">
<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.3.9.1 </small></address>
</body>
</html>
|
