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108 lines
4.7 KiB
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<A HREF="FSOUND.html#Functions"><H5>[API function]</A></H5>
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<H2><A NAME="FSOUND_PlaySound">FSOUND_PlaySound</A></H2>
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Plays a sample in a specified channel, using the sample's default frequency, volume<BR>
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and pan settings.<BR>
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<P>
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<B>int F_API </B><B> </B><B>FSOUND_PlaySound</B><B>(</B><BR>
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<B>int </B><B> </B><I>channel</I><B>,</B><BR>
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<B>FSOUND_SAMPLE *</B><I>sptr</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>channel</I></TD>
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<TD>0+ <BR>
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The absolute channel number in the channel pool. <BR>
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Remember software channels come first, followed by hardware channels. <BR>
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You cannot play a software sample on a hardware channel and vice versa.<BR>
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FSOUND_FREE<BR>
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Chooses a free channel to play in. If all channels are used then it<BR>
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selects a channel with a sample playing that has an EQUAL or LOWER priority <BR>
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than the sample to be played.<BR>
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FSOUND_ALL<BR>
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Passing this will cause ALL channels to play. (note this will make things<BR>
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VERY noisy!)<BR>
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If FSOUND_ALL is used the last channel success flag will be returned.<BR>
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</TD><TR VALIGN=top><TD><I>sptr</I></TD>
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<TD>Pointer to the sample to be played.<BR>
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</TD></TABLE>
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<H3>Return Value</H3>
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On success, the channel handle that was selected is returned.<BR>
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On failure, -1 is returned.<BR>
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<H3>Remarks</H3>
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If you play a FSOUND_HW3D declared sample with this function, then the position and velocity<BR>
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are set to those of the listener. Other attributes such as volume, frequency and pan are taken<BR>
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from the sample's default volume, frequency, pan etc.<BR>
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----------<BR>
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The channel handle :<BR>
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The return value is reference counted. This stops the user from updating a stolen channel.<BR>
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Basically it means the only sound you can change the attributes (ie volume/pan/frequency/3d position) for are the one you specifically called playsound for. If another sound steals that channel, and you keep trying to change its attributes (ie volume/pan/frequency/3d position), it will do nothing.<BR>
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This is great if you have sounds being updated from tasks and you just forget about it.<BR>
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You can keep updating the sound attributes and if another task steals that channel, your original task wont change the attributes of the new sound!!!<BR>
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The lower 12 bits contain the channel number. (yes this means a 4096 channel limit for FMOD :)<BR>
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The upper 19 bits contain the reference count.<BR>
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The top 1 bit is the sign bit.<BR>
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ie<BR>
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S RRRRRRRRRRRRRRRRRRR CCCCCCCCCCCC<BR>
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----------<BR>
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Remember if not using FSOUND_FREE, then the channel pool is split up into software and hardware channels.<BR>
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Software channels occupy the first n indicies specified by the value passed into FSOUND_Init.<BR>
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Hardware channels occupy the next n indicies after this, and can be a variable amount, depending on the hardware.<BR>
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Use FSOUND_GetNumHardwareChannels to query how many channels are available in hardware.<BR>
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___________________<BR>
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Supported on the following platforms : Win32, WinCE, Linux, Macintosh, XBox, PlayStation 2, GameCube<BR>
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<H3>See Also</H3>
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<A HREF="FSOUND_FX_Enable.html">FSOUND_FX_Enable</A>
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,
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<A HREF="FSOUND_GetNumHardwareChannels.html">FSOUND_GetNumHardwareChannels</A>
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,
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<A HREF="FSOUND_GetNumSubChannels.html">FSOUND_GetNumSubChannels</A>
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,
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<A HREF="FSOUND_GetSubChannel.html">FSOUND_GetSubChannel</A>
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,
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<A HREF="FSOUND_Init.html">FSOUND_Init</A>
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,
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<A HREF="FSOUND_PlaySoundEx.html">FSOUND_PlaySoundEx</A>
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,
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<A HREF="FSOUND_Sample_SetMaxPlaybacks.html">FSOUND_Sample_SetMaxPlaybacks</A>
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,
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<A HREF="FSOUND_StopSound.html">FSOUND_StopSound</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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<FONT SIZE="-2">Generated Thu Dec 15 17:31:31 2005
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