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81 lines
4.7 KiB
Text
81 lines
4.7 KiB
Text
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The '''_SNDOPEN''' function loads a sound file into memory and returns a [[LONG]] handle value above 0.
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{{PageSyntax}}
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:{{Parameter|sound_handle&}} = {{KW|_SNDOPEN}} (''filename$''[, "[VOL][,][SYNC][,][LEN][,][PAUSE][,][SETPOS]"])
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{{PageDescription}}
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* Returns a [[LONG]] ''sound handle'' value to the sound file in memory. '''A zero value means the sound could NOT be loaded.'''
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* The literal or variable [[STRING]] sound ''file name'' can be WAV, OGG, AIFF, RIFF, VOC, MP3, MOD or MIDI file types.
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*Capabilities of VOL, LEN, SYNC, SETPOS and PAUSE is a string of parameters separated by commas. It is NOT case sensitive.
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* '''ALWAYS check the handle value returned is greater than zero before attempting to play the sound!'''
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* The handle can be used by most of the SND sound playing Functions and Subs in QB64 except [[_SNDPLAYFILE]] which plays a sound file name directly and does not use a handle value.
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* Handles can be closed with [[_SNDCLOSE]] when the sound is no longer necessary.
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*An '''ILLEGAL FUNCTION CALL''' error message means the capabilities$ string was invalid or two NON-SYNC sounds are using the same channel!
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* If a WAV sound file won't play, try it using the Windows [[Windows_Libraries#Play_WAV_Sounds|Play WAV sounds library]] to check it or convert the sound file to OGG!
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<center>'''Sound File Capabilities'''</center>
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* Each capability can only be specified once and must be valid for that file or it won't play. Capabilities can be listed in any order.
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{{TextStart}} QB64 supports the following sound file formats ('''Bold is a guaranteed capability'''):
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WAV = "'''VOL,SYNC,LEN''',PAUSE" [http://www.rarewares.org/ogg-oggdropxpd.php Free WAV to OGG GUI converter]
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OGG = "VOL,SYNC,LEN,PAUSE" [http://www.rarewares.org/ogg-oggenc.php Free WAV to OGG converter]
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AIF = "VOL,SYNC,LEN,PAUSE"
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RIF = "VOL,SYNC,LEN,PAUSE"
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VOC = "VOL,SYNC,LEN,PAUSE"
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MID = "'''VOL'''"
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MOD = "VOL,PAUSE"
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MP3 = "'''VOL''',PAUSE,SETPOS" [http://www.freemp3wmaconverter.com/index.html Free WMA, MP3 and OGG converter]
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''Note:'' {{Cb|_SNDBAL}} only affects MP3 volume. Sound will reside in main channel.
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{{TextEnd}}
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* The required sound file capabilities can make a difference as to whether a sound file can be played or not and how it can be used.
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:'''Only one sound can exist on the primary channel, and it must be closed before playing another non-SYNC sound.
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<center>See {{KW|_SNDCOPY}} and {{KW|_SNDPLAYCOPY}}</center>
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{{TextStart}} '''Capability Descriptions'''
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"'''VOL'''" can change the volume or balance of the sound using {{Cb|_SNDVOL}} and {{Cb|_SNDBAL}}.
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"'''LEN'''" can get the length of the sound using the {{Cb|_SNDLEN}} function.
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"'''PAUSE'''" can pause the sound using {{Cb|_SNDPAUSE}} and the {{Cb|_SNDPAUSED}} function can check it.
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"'''SETPOS'''" can change the position the sound is (or will be) playing from. See {{Cb|_SNDSETPOS}}.
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"'''SYNC'''" can load the sound onto a unique channel, to be played simultaneously with others.
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'''When SYNC is not specified, the sound is loaded onto the primary channel.'''
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{{TextEnd}}
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''Snippet 1:'' Loading a sound file to use in the program later. Only load it ONCE and use the handle any time you want!
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{{CodeStart}}
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h& = {{Cl|_SNDOPEN}}("dog.wav","sync,vol") 'only use the capabilities of that file type
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IF h& = 0 THEN BEEP ELSE {{Cl|_SNDPLAY}} h& 'check for valid handle before using!
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{{CodeEnd}}
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''Snippet 2:'' Playing a sound from 2 different speakers based on program results. Must use SYNC!
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{{CodeStart}} '' ''
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Laff& = {{Cl|_SNDOPEN}}("KONGlaff.ogg", "SYNC,VOL") 'load sound file and get LONG handle value
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{{Cl|IF}} LaffX! < -1 {{Cl|THEN}} LaffX! = -1 'set full volume to left speaker
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{{Cl|IF}} LaffX! > 1 {{Cl|THEN}} LaffX! = 1 'set full volume to right speaker
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{{Cl|_SNDBAL}} Laff&, LaffX! 'balance sound to left or right speaker
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{{Cl|_SNDPLAY}} Laff& 'play sound '' ''
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{{CodeEnd}}
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{{PageSeeAlso}}
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* [[_SNDCLOSE]], [[_SNDPLAY]], [[_SNDSTOP]]
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* [[_SNDPAUSE]], [[_SNDLOOP]], [[_SNDLIMIT]]
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* [[_SNDSETPOS]], [[_SNDGETPOS]]
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* [[_SNDPLAYING]], [[_SNDPAUSED]]
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* [[_SNDCOPY]], [[_SNDPLAYCOPY]]
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* [[_SNDBAL]], [[_SNDLEN]], [[_SNDVOL]]
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* [[_SNDPLAYFILE]] {{text|(plays a named sound file directly and closes)}}
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* [[_SNDRAW]], [[_SNDRATE]], [[_SNDRAWLEN]] {{text|{raw sounds without files)}}
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{{PageNavigation}}
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