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<A HREF="FSOUND.html#Functions"><H5>[API function]</A></H5>
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<H2><A NAME="FSOUND_DSP_MixBuffers">FSOUND_DSP_MixBuffers</A></H2>
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Allows the user to mix their own data from one buffer to another, using FSOUNDs optimized<BR>
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mixer routines. This was mainly provided for DSP routines, though it can be used for <BR>
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anything.<BR>
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<P>
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<B>signed char F_API </B><B> </B><B>FSOUND_DSP_MixBuffers</B><B>(</B><BR>
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<B>void *</B><I>destbuffer</I><B>,</B><BR>
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<B>void *</B><I>srcbuffer</I><B>,</B><BR>
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<B>int </B><B> </B><I>len</I><B>,</B><BR>
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<B>int </B><B> </B><I>freq</I><B>,</B><BR>
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<B>int </B><B> </B><I>vol</I><B>,</B><BR>
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<B>int </B><B> </B><I>pan</I><B>,</B><BR>
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<B>unsigned int </B><B> </B><I>mode</I><BR>
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<B>);</B><BR>
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<H3>Parameters</H3>
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<TABLE>
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<TR VALIGN=top><TD><I>destbuffer</I></TD>
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<TD>Pointer to a buffer to have the data mixed into.<BR>
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</TD><TR VALIGN=top><TD><I>srcbuffer</I></TD>
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<TD>Pointer to the source buffer to be mixed in.<BR>
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</TD><TR VALIGN=top><TD><I>len</I></TD>
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<TD>Amount to mix in SAMPLES.<BR>
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</TD><TR VALIGN=top><TD><I>freq</I></TD>
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<TD>Speed to mix data to output buffer. Remember if you mix at a rate <BR>
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different than the output rate, the buffer lengths will have to be <BR>
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different to compensate. Ie if the output rate is 44100 and you supply<BR>
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a value of 88200 to FSOUND_DSP_MixBuffers, you will only need a destbuffer<BR>
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that is half the size of srcbuffer. If you supply a value of 22050 then<BR>
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you will need a destbuffer that is twice as big as srcbuffer. If they<BR>
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are both the same size then it will only mix half of the data.<BR>
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</TD><TR VALIGN=top><TD><I>vol</I></TD>
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<TD>volume scalar value of mix. Valid values are 0 (silence) to 255 <BR>
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(full volume). See FSOUND_SetVolume for more information.<BR>
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</TD><TR VALIGN=top><TD><I>pan</I></TD>
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<TD>pan value for data being mixed. Valid values are 0 (full left), 128<BR>
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(middle), 255 (full right) and FSOUND_STEREOPAN. See FSOUND_SetPan for <BR>
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more information.<BR>
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</TD><TR VALIGN=top><TD><I>mode</I></TD>
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<TD>Bit settings to describe the source buffer. Valid values are found in<BR>
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FSOUND_MODES, but only 8/16bit and stereo/mono flags are interpreted,<BR>
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other flags are ignored.<BR>
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</TD></TABLE>
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<H3>Return Value</H3>
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On success, TRUE is returned.<BR>
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On failure, FALSE is returned.<BR>
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<H3>Remarks</H3>
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'destbuffer' should always the format of the mixing output buffer, as it will use the mixer<BR>
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currently running to do the mixing.<BR>
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For MMX it is 16bit stereo, so it is 4 bytes per output sample (word left, word right)<BR>
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For Standard Blend mode it is 32bit stereo, so it is 8 bytes per output sample (left dword, right dword)<BR>
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For FPU mixer it is 32bit float stereo, so it is 8 bytes per output sample (left float, right float)<BR>
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FSOUND_GetMixer can be used to determine which mixer is being used.<BR>
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___________________<BR>
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Supported on the following platforms : Win32, WinCE, Linux, Macintosh, XBox, GameCube<BR>
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<H3>See Also</H3>
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<A HREF="FSOUND_DSP_Create.html">FSOUND_DSP_Create</A>
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,
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<A HREF="FSOUND_DSP_MixBuffers.html">FSOUND_DSP_MixBuffers</A>
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,
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<A HREF="FSOUND_GetMixer.html">FSOUND_GetMixer</A>
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,
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<A HREF="FSOUND_MODES.html">FSOUND_MODES</A>
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,
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<A HREF="FSOUND_SetFrequency.html">FSOUND_SetFrequency</A>
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,
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<A HREF="FSOUND_SetPan.html">FSOUND_SetPan</A>
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,
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<A HREF="FSOUND_SetVolume.html">FSOUND_SetVolume</A>
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<HR><BR><FONT SIZE="-2">This document copyright ©Firelight Technologies, Pty, Ltd, 1999-2002. All rights reserved.</FONT><BR>
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