blob: 897d980dbdec5054e69f0e89d8fca7893e2c7124 (
plain)
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
|
<refentry id="filelen">
<indexterm id="IndexFilelen"><primary>filelen</primary></indexterm>
<refentryinfo><title>Signal I/O:Soundfile Queries</title></refentryinfo>
<refmeta>
<refentrytitle>filelen</refentrytitle>
</refmeta>
<refnamediv>
<refname>filelen</refname>
<refpurpose>
Returns the length of a sound file.
</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<para>
Returns the length of a sound file.
</para>
</refsect1>
<refsect1>
<title>Syntax</title>
<synopsis>ir <command>filelen</command> ifilcod, [iallowraw]</synopsis>
</refsect1>
<refsect1>
<title>Initialization</title>
<para>
<emphasis>ifilcod</emphasis> -- sound file to be queried
</para>
<para>
<emphasis>iallowraw</emphasis> -- Allow raw sound files (default=1)
</para>
</refsect1>
<refsect1>
<title>Performance</title>
<para>
<emphasis>filelen</emphasis> returns the length of the sound file <emphasis>ifilcod</emphasis> in seconds. <emphasis>filelen</emphasis> can return the length of convolve and PVOC files if the "allow raw sound file" flag is not zero (it is non-zero by default).
</para>
</refsect1>
<refsect1>
<title>Examples</title>
<para>
Here is an example of the filelen opcode. It uses the file <ulink url="examples/filelen.csd"><citetitle>filelen.csd</citetitle></ulink>, and <ulink url="examples/mary.wav"><citetitle>mary.wav</citetitle></ulink>.
<example>
<title>Example of the filelen opcode.</title>
<para>See the sections <link linkend="UsingRealTime"><citetitle>Real-time Audio</citetitle></link> and <link linkend="CommandFlags"><citetitle>Command Line Flags</citetitle></link> for more information on using command line flags.</para>
<xi:include href="examples-xml/filelen.csd.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/>
</example>
The audio file <quote>mary.wav</quote> is 3.5 seconds long. So <emphasis>filelen</emphasis>'s output should include a line like this:
<screen>
instr 1: ilen = 3.501
</screen>
</para>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<link linkend="filenchnls"><citetitle>filenchnls</citetitle></link>,
<link linkend="filepeak"><citetitle>filepeak</citetitle></link>,
<link linkend="filesr"><citetitle>filesr</citetitle></link>
</para>
</refsect1>
<refsect1>
<title>Credits</title>
<para>
<simplelist>
<member>Author: &namematt;</member>
<member>July 1999</member>
</simplelist>
</para>
<para>Example written by &namekevin;.</para>
<para>New in Csound version 3.57</para>
</refsect1>
</refentry>
|
