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<HTML><HEAD><TITLE>SDL_BuildAudioCVT</TITLE><METANAME="GENERATOR"CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+"><LINKREL="HOME"TITLE="SDL Library Documentation"HREF="index.html"><LINKREL="UP"TITLE="Audio"HREF="audio.html"><LINKREL="PREVIOUS"TITLE="SDL_AudioCVT"HREF="sdlaudiocvt.html"><LINKREL="NEXT"TITLE="SDL_ConvertAudio"HREF="sdlconvertaudio.html"></HEAD><BODYCLASS="REFENTRY"BGCOLOR="#FFF8DC"TEXT="#000000"LINK="#0000ee"VLINK="#551a8b"ALINK="#ff0000"><DIVCLASS="NAVHEADER"><TABLESUMMARY="Header navigation table"WIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><THCOLSPAN="3"ALIGN="center">SDL Library Documentation</TH></TR><TR><TDWIDTH="10%"ALIGN="left"VALIGN="bottom"><AHREF="sdlaudiocvt.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="80%"ALIGN="center"VALIGN="bottom"></TD><TDWIDTH="10%"ALIGN="right"VALIGN="bottom"><AHREF="sdlconvertaudio.html"ACCESSKEY="N">Next</A></TD></TR></TABLE><HRALIGN="LEFT"WIDTH="100%"></DIV><H1><ANAME="SDLBUILDAUDIOCVT"></A>SDL_BuildAudioCVT</H1><DIVCLASS="REFNAMEDIV"><ANAME="AEN7002"></A><H2>Name</H2>SDL_BuildAudioCVT -- Initializes a SDL_AudioCVT structure for conversion</DIV><DIVCLASS="REFSYNOPSISDIV"><ANAME="AEN7005"></A><H2>Synopsis</H2><DIVCLASS="FUNCSYNOPSIS"><ANAME="AEN7006"></A><P></P><PRECLASS="FUNCSYNOPSISINFO">#include "SDL.h"</PRE><P><CODE><CODECLASS="FUNCDEF">int <BCLASS="FSFUNC">SDL_BuildAudioCVT</B></CODE>(SDL_AudioCVT *cvt, Uint16 src_format, Uint8 src_channels, int src_rate, Uint16 dst_format, Uint8 dst_channels, int dst_rate);</CODE></P><P></P></DIV></DIV><DIVCLASS="REFSECT1"><ANAME="AEN7012"></A><H2>Description</H2><P>Before an <AHREF="sdlaudiocvt.html"><SPANCLASS="STRUCTNAME">SDL_AudioCVT</SPAN></A> structure can be used to convert audio data it must be initialized with source and destination information. </P><P><TTCLASS="PARAMETER"><I>src_format</I></TT> and <TTCLASS="PARAMETER"><I>dst_format</I></TT> are the source and destination format of the conversion. (For information on audio formats see <AHREF="sdlaudiospec.html"><SPANCLASS="STRUCTNAME"> SDL_AudioSpec</SPAN></A>). <TTCLASS="PARAMETER"><I>src_channels</I></TT> and <TTCLASS="PARAMETER"><I>dst_channels</I></TT> are the number of channels in the source and destination formats. Finally, <TTCLASS="PARAMETER"><I>src_rate</I></TT> and <TTCLASS="PARAMETER"><I>dst_rate</I></TT> are the frequency or samples-per-second of the source and destination formats. Once again, see <AHREF="sdlaudiospec.html"><SPANCLASS="STRUCTNAME">SDL_AudioSpec</SPAN></A>.</P></DIV><DIVCLASS="REFSECT1"><ANAME="AEN7028"></A><H2>Return Values</H2><P>Returns <SPANCLASS="RETURNVALUE">-1</SPAN> if the filter could not be built or 1 if it could.</P></DIV><DIVCLASS="REFSECT1"><ANAME="AEN7032"></A><H2>Examples</H2><P>See <AHREF="sdlconvertaudio.html"><TTCLASS="FUNCTION">SDL_ConvertAudio</TT></A>.</P></DIV><DIVCLASS="REFSECT1"><ANAME="AEN7037"></A><H2>See Also</H2><P><AHREF="sdlconvertaudio.html"><TTCLASS="FUNCTION">SDL_ConvertAudio</TT></A>,<AHREF="sdlaudiocvt.html"><TTCLASS="FUNCTION">SDL_AudioCVT</TT></A></P></DIV><DIVCLASS="NAVFOOTER"><HRALIGN="LEFT"WIDTH="100%"><TABLESUMMARY="Footer navigation table"WIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top"><AHREF="sdlaudiocvt.html"ACCESSKEY="P">Prev</A></TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="index.html"ACCESSKEY="H">Home</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top"><AHREF="sdlconvertaudio.html"ACCESSKEY="N">Next</A></TD></TR><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top">SDL_AudioCVT</TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="audio.html"ACCESSKEY="U">Up</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top">SDL_ConvertAudio</TD></TR></TABLE></DIV></BODY></HTML>⌨️ 快捷键说明
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