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Current libsamplerate source
author Chris Cannam
date Tue, 18 Oct 2016 13:24:45 +0100
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6 Secret Rabbit Code (aka libsamplerate)
7 </TITLE>
8 <META NAME="Author" CONTENT="Erik de Castro Lopo (erikd AT mega-nerd DOT com)">
9 <META NAME="Version" CONTENT="libsamplerate-0.1.8">
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11 <META NAME="Keywords" CONTENT="libsamplerate sound resample audio dsp Linux">
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42 Author :<BR>Erik de Castro Lopo
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59
60 <H1><B>Applications Programming Interface</B></H1>
61 <P>
62 The publically callable functions of libsamplerate are all listed in the
63 <B>&lt;samplerate.h&gt;</B> header file.
64 In order to use any of the functionality of libsamplerate, you need to add
65 </P>
66 <PRE>
67 #include &lt;samplerate.h&gt;
68 </PRE>
69 <P>
70 to the top of any function that call any of the following functions.
71 You will also need to link you binary with the libsamplerate library.
72 </P>
73 <P>
74 The API allows three methods for accessing the capabilies of the library:
75 </P>
76 <UL>
77 <LI>A <A HREF="api_simple.html">simple interface</A> which can sample rate convert
78 a single block of samples (one or more channels) in one go.
79 The simple API is less capable than the full API.
80 <LI>A <A HREF="api_full.html">more fully featured interface</A> which allows time
81 varying sample rate conversion on streaming data (again one or more
82 channels).
83 <LI>A <A HREF="api_callback.html">callback interface</A> which has the same
84 functionality as the interface above but allows the details of input and
85 output to be separated.
86 The output is generated by call a read function and the library calls a user
87 supplied callback function to obtain its input.
88 This interface is particularly well suited to applications where the output
89 sample rate is varied with time.
90 </UL>
91
92 <P>
93 <b>NB :</b> All three access methods are able to process multi channel interleaved
94 data.
95 </P>
96
97 <P>
98 The parts of the API which are common to all three interfaces are:
99 </P>
100 <UL>
101 <LI> The <A HREF="api_misc.html#ErrorReporting">error reporting</A> mechanisim.
102 <LI> The available <A HREF="api_misc.html#Converters">converter</A> types.
103 <LI> The <A HREF="api_misc.html#SRC_DATA">SRC_DATA</A> struct.
104 </UL>
105 <P>
106 All three versions of the API are restricted to operating on buffers of ISO C
107 Standard <B>float</B> data.
108 However, there are two
109 <A HREF="api_misc.html#Aux">auxillary functions</A>
110 for converting arrays of float data to and from short data.
111 </P>
112
113 <P>
114 <B>Note:</B> The <B>tests/</B> and <B>examples/</B> directories of the source code
115 distribution contain numerous example programs showing the use of the library.
116 </P>
117
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