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
|
<!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: 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="files.html">File List</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 "fft.hch"</span>
00027
00028 <span class="preprocessor">#include "debug.hch"</span>
00029
00030 <span class="comment">/*</span>
00031 <span class="comment"> * Forward declarations</span>
00032 <span class="comment"> */</span>
00033 <span class="keyword">static</span> macro expr ClockRate = PAL_ACTUAL_CLOCK_RATE;
00034 <span class="preprocessor">#if HARDWARE_MULTIPLY</span>
00035 <span class="preprocessor"></span><span class="comment">//input buffer</span>
00036 ram <span class="keywordtype">signed</span> 18 audio_buffer_in[256] with { block = <span class="stringliteral">"BlockRAM"</span>};
00037 <span class="comment">//output buffer</span>
00038 ram <span class="keywordtype">signed</span> 18 audio_buffer_out[128] with { block = <span class="stringliteral">"BlockRAM"</span>};
00039 <span class="preprocessor">#else</span>
00040 <span class="preprocessor"></span><span class="comment">//input buffer</span>
00041 ram <span class="keywordtype">signed</span> 16 audio_buffer_in[256] with { block = <span class="stringliteral">"BlockRAM"</span>};
00042 <span class="comment">//output buffer</span>
00043 ram <span class="keywordtype">signed</span> 16 audio_buffer_out[128] with { block = <span class="stringliteral">"BlockRAM"</span>};
00044 <span class="preprocessor">#endif</span>
00045 <span class="preprocessor"></span><span class="comment">//EQ settings for the FFT</span>
00046 ram <span class="keywordtype">unsigned</span> 4 EQ_info[128] with { block = <span class="stringliteral">"BlockRAM"</span>};
00047 <span class="comment">//EQ settings received from the display</span>
00048
00049
00050 <span class="preprocessor">#if HARDWARE_MULTIPLY</span>
00051 <span class="preprocessor"></span><span class="keywordtype">signed</span> 18 *audioptr_in1,*audioptr_in2,*audioptr_in3,*audioptr_in4;
00052
00053 <span class="keywordtype">signed</span> 18 *audioptr_out1,*audioptr_out2;
00054
00055 <span class="keywordtype">unsigned</span> 6 *displayptr1,*displayptr2,*displayptr3,*displayptr4;
00056 <span class="preprocessor">#else</span>
00057 <span class="preprocessor"></span><span class="keywordtype">signed</span> 16 *audioptr_in1,*audioptr_in2,*audioptr_in3,*audioptr_in4;
00058
00059 <span class="keywordtype">signed</span> 16 *audioptr_out1,*audioptr_out2;
00060
00061 <span class="keywordtype">unsigned</span> 6 *displayptr1,*displayptr2,*displayptr3,*displayptr4;
00062 <span class="preprocessor">#endif</span>
00063 <span class="preprocessor"></span>
00074 macro proc <a class="code" href="audio_8hcc.html#a1">audio_main</a>(audiodata, AUDIOIN, AUDIOOUT)
00075 {
00076 <span class="keywordtype">signed</span> 18 sample;
00077 <span class="keywordtype">unsigned</span> 6 sample_count;
00078 <span class="keywordtype">unsigned</span> 8 i,cycle;
00079 <span class="keywordtype">unsigned</span> 4 eqinfo;
00080
00081 <span class="keywordtype">unsigned</span> 1 FFT_Sync, first;
00082 macro expr OW = PalAudioOutGetMaxDataWidthCT ();
00083 macro expr IW = PalAudioInGetMaxDataWidthCT ();
00084 <span class="keywordtype">signed</span> LeftNew, RightNew;
00085 <span class="keywordtype">signed</span> Output_sample;
00086
00087 ram <span class="keywordtype">unsigned</span> 6 input[64];
00088
00089 <span class="comment">//pointers for double and quadruple buffering:</span>
00090 audioptr_in1 = &audio_buffer_in[0];
00091 audioptr_in2 = &audio_buffer_in[64];
00092 audioptr_in3 = &audio_buffer_in[128];
00093 audioptr_in4 = &audio_buffer_in[192];
00094
00095 audioptr_out1 = &audio_buffer_out[0];
00096 audioptr_out2 = &audio_buffer_out[64];
00097
00098 displayptr1 = &audiodata.ifft_info.write[0];
00099 displayptr2 = &audiodata.ifft_info.write[64];
00100 displayptr3 = &audiodata.ifft_info.write[128];
00101 displayptr4 = &audiodata.ifft_info.write[192];
00102
00103 FFT_Sync=0;
00104 par
00105 {
00106 <span class="keywordflow">for</span>(;;)
00107 {
00108 <span class="keywordflow">if</span> (FFT_Sync) <span class="comment">//if 64 samples are read from ADC...</span>
00109 {
00110 par
00111 {
00112 <span class="comment">// switch pointers </span>
00113 audioptr_in1 = audioptr_in2;
00114 audioptr_in2 = audioptr_in3;
00115 audioptr_in3 = audioptr_in4;
00116 audioptr_in4 = audioptr_in1;
00117
00118 audioptr_out1 = audioptr_out2;
00119 audioptr_out2 = audioptr_out1;
00120
00121 displayptr1=displayptr2;
00122 displayptr2=displayptr3;
00123 displayptr3=displayptr4;
00124 displayptr4=displayptr1;
00125
00126 FFT_Sync = 0;
00127 }
00128
00129 <span class="comment">// FFT calculation</span>
00130 perform_fft(audioptr_in1);
00131
00132 <span class="preprocessor">#if PERFORM_FFT_CALCULATION</span>
00133 <span class="preprocessor"></span> <a class="code" href="fft_8hcc.html#a5">equalize_audio</a>(&audiodata);
00134 <span class="preprocessor">#endif</span>
00135 <span class="preprocessor"></span> <span class="comment">// inverse FFT calculation</span>
00136 perform_ifft(audioptr_out1,displayptr1);
00137 }
00138 <span class="keywordflow">else</span>
00139 delay;
00140 }
00141
00142 <span class="keywordflow">for</span>(sample_count=0;;)<span class="comment">//store the samples in the inputbuffer</span>
00143 {
00144 <span class="keywordflow">if</span> (!FFT_Sync)
00145 {
00146 par
00147 {
00148 seq
00149 {
00150 PalAudioInRead(AUDIOIN, &LeftNew, &RightNew);
00151 <span class="preprocessor">#if HARDWARE_MULTIPLY </span>
00152 <span class="preprocessor"></span> audioptr_in1[sample_count] = LeftNew;<span class="comment">//drop 2 LSB's</span>
00153 <span class="preprocessor">#else</span>
00154 <span class="preprocessor"></span> audioptr_in1[sample_count] = (LeftNew\\2);<span class="comment">//drop 2 LSB's</span>
00155 <span class="preprocessor">#endif</span>
00156 <span class="preprocessor"></span> sample_count++;
00157 <span class="keywordflow">if</span> (!sample_count)
00158 {
00159 FFT_Sync = 1;
00160 }
00161 }
00162 seq
00163 {
00164 Output_sample = audioptr_out2[sample_count];
00165 }
00166 }
00167 }
00168 <span class="keywordflow">else</span>
00169 {
00170 delay;
00171 }
00172 }
00173 <span class="keywordflow">for</span>(;;)
00174 {
00175 PalAudioOutWrite(AUDIOOUT,(<span class="keywordtype">signed</span> OW)(Output_sample @ 0),(<span class="keywordtype">signed</span> OW)(Output_sample @ 0));
00176 }
00177 }<span class="comment">//end par</span>
00178 }<span class="comment">// end function</span>
00179 <span class="preprocessor">#endif</span>
00180 <span class="preprocessor"></span>
</pre></div><hr size="1"><address style="align: right;"><small>Generated on Mon Nov 29 12:04:48 2004 for Graphic Equalizer 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>
|
