####################################################################### # # Win32::Sound - An extension to play with Windows sounds # # Author: Aldo Calpini # Version: 0.47 # Info: # http://www.divinf.it/dada/perl # http://www.perl.com/CPAN/authors/Aldo_Calpini # ####################################################################### # Version history: # 0.01 (19 Nov 1996) file created # 0.03 (08 Apr 1997) first release # 0.30 (20 Oct 1998) added Volume/Format/Devices/DeviceInfo # (thanks Dave Roth!) # 0.40 (16 Mar 1999) added the WaveOut object # 0.45 (09 Apr 1999) added $! support, documentation et goodies # 0.46 (25 Sep 1999) fixed small bug in DESTROY, wo was used without being # initialized (Gurusamy Sarathy ) # 0.47 (22 May 2000) support for passing Unicode string to Play() # (Doug Lankshear ) package Win32::Sound; # See the bottom of this file for the POD documentation. # Search for the string '=head'. require Exporter; # to export the constants to the main:: space require DynaLoader; # to dynuhlode the module. @ISA= qw( Exporter DynaLoader ); @EXPORT = qw( SND_ASYNC SND_NODEFAULT SND_LOOP SND_NOSTOP ); ####################################################################### # This AUTOLOAD is used to 'autoload' constants from the constant() # XS function. If a constant is not found then control is passed # to the AUTOLOAD in AutoLoader. # sub AUTOLOAD { my($constname); ($constname = $AUTOLOAD) =~ s/.*:://; #reset $! to zero to reset any current errors. $!=0; my $val = constant($constname, @_ ? $_[0] : 0); if ($! != 0) { # [dada] This results in an ugly Autoloader error #if ($! =~ /Invalid/) { # $AutoLoader::AUTOLOAD = $AUTOLOAD; # goto &AutoLoader::AUTOLOAD; #} else { # [dada] ... I prefer this one :) ($pack, $file, $line) = caller; undef $pack; # [dada] and get rid of "used only once" warning... die "Win32::Sound::$constname is not defined, used at $file line $line."; #} } eval "sub $AUTOLOAD { $val }"; goto &$AUTOLOAD; } ####################################################################### # STATIC OBJECT PROPERTIES # $VERSION="0.47"; undef unless $VERSION; # [dada] to avoid "possible typo" warning ####################################################################### # METHODS # sub Version { $VERSION } sub Volume { my(@in) = @_; # Allows '0%'..'100%' $in[0] =~ s{ ([\d\.]+)%$ }{ int($1*100/255) }ex if defined $in[0]; $in[1] =~ s{ ([\d\.]+)%$ }{ int($1*100/255) }ex if defined $in[1]; _Volume(@in); } ####################################################################### # dynamically load in the Sound.dll module. # bootstrap Win32::Sound; ####################################################################### # Win32::Sound::WaveOut # package Win32::Sound::WaveOut; sub new { my($class, $one, $two, $three) = @_; my $self = {}; bless($self, $class); if($one !~ /^\d+$/ and not defined($two) and not defined($three)) { # Looks like a file $self->Open($one); } else { # Default format if not given $self->{samplerate} = ($one or 44100); $self->{bits} = ($two or 16); $self->{channels} = ($three or 2); $self->OpenDevice(); } return $self; } sub Volume { my(@in) = @_; # Allows '0%'..'100%' $in[0] =~ s{ ([\d\.]+)%$ }{ int($1*255/100) }ex if defined $in[0]; $in[1] =~ s{ ([\d\.]+)%$ }{ int($1*255/100) }ex if defined $in[1]; _Volume(@in); } sub Pitch { my($self, $pitch) = @_; my($int, $frac); if(defined($pitch)) { $pitch =~ /(\d+).?(\d+)?/; $int = $1; $frac = $2 or 0; $int = $int << 16; $frac = eval("0.$frac * 65536"); $pitch = $int + $frac; return _Pitch($self, $pitch); } else { $pitch = _Pitch($self); $int = ($pitch & 0xFFFF0000) >> 16; $frac = $pitch & 0x0000FFFF; return eval("$int.$frac"); } } sub PlaybackRate { my($self, $rate) = @_; my($int, $frac); if(defined($rate)) { $rate =~ /(\d+).?(\d+)?/; $int = $1; $frac = $2 or 0; $int = $int << 16; $frac = eval("0.$frac * 65536"); $rate = $int + $frac; return _PlaybackRate($self, $rate); } else { $rate = _PlaybackRate($self); $int = ($rate & 0xFFFF0000) >> 16; $frac = $rate & 0x0000FFFF; return eval("$int.$frac"); } } # Preloaded methods go here. #Currently Autoloading is not implemented in Perl for win32 # Autoload methods go after __END__, and are processed by the autosplit program. 1; __END__ =head1 NAME Win32::Sound - An extension to play with Windows sounds =head1 SYNOPSIS use Win32::Sound; Win32::Sound::Volume('100%'); Win32::Sound::Play("file.wav"); Win32::Sound::Stop(); # ...and read on for more fun ;-) =head1 FUNCTIONS =over 4 =item B Plays the specified sound: SOUND can the be name of a WAV file or one of the following predefined sound names: SystemDefault SystemAsterisk SystemExclamation SystemExit SystemHand SystemQuestion SystemStart Additionally, if the named sound could not be found, the function plays the system default sound (unless you specify the C flag). If no parameters are given, this function stops the sound actually playing (see also Win32::Sound::Stop). FLAGS can be a combination of the following constants: =over 4 =item C The sound is played asynchronously and the function returns immediately after beginning the sound (if this flag is not specified, the sound is played synchronously and the function returns when the sound ends). =item C The sound plays repeatedly until it is stopped. You must also specify C flag. =item C No default sound is used. If the specified I cannot be found, the function returns without playing anything. =item C If a sound is already playing, the function fails. By default, any new call to the function will stop previously playing sounds. =back =item B Stops the sound currently playing. =item B Returns the wave device volume; if called in an array context, returns left and right values. Otherwise, returns a single 32 bit value (left in the low word, right in the high word). In case of error, returns C and sets $!. Examples: ($L, $R) = Win32::Sound::Volume(); if( not defined Win32::Sound::Volume() ) { die "Can't get volume: $!"; } =item B Sets the wave device volume; if two arguments are given, sets left and right channels independently, otherwise sets them both to LEFT (eg. RIGHT=LEFT). Values range from 0 to 65535 (0xFFFF), but they can also be given as percentage (use a string containing a number followed by a percent sign). Returns C and sets $! in case of error, a true value if successful. Examples: Win32::Sound::Volume('50%'); Win32::Sound::Volume(0xFFFF, 0x7FFF); Win32::Sound::Volume('100%', '50%'); Win32::Sound::Volume(0); =item B Returns information about the specified WAV file format; the array contains: =over =item * sample rate (in Hz) =item * bits per sample (8 or 16) =item * channels (1 for mono, 2 for stereo) =back Example: ($hz, $bits, $channels) = Win32::Sound::Format("file.wav"); =item B Returns all the available sound devices; their names contain the type of the device (WAVEOUT, WAVEIN, MIDIOUT, MIDIIN, AUX or MIXER) and a zero-based ID number: valid devices names are for example: WAVEOUT0 WAVEOUT1 WAVEIN0 MIDIOUT0 MIDIIN0 AUX0 AUX1 AUX2 There are also two special device names, C and C (the default devices for wave output and midi output). Example: @devices = Win32::Sound::Devices(); =item Win32::Sound::DeviceInfo(DEVICE) Returns an associative array of information about the sound device named DEVICE (the same format of Win32::Sound::Devices). The content of the array depends on the device type queried. Each device type returns B the following information: manufacturer_id product_id name driver_version For additional data refer to the following table: WAVEIN..... formats channels WAVEOUT.... formats channels support MIDIOUT.... technology voices notes channels support AUX........ technology support MIXER...... destinations support The meaning of the fields, where not obvious, can be evinced from the Microsoft SDK documentation (too long to report here, maybe one day... :-). Example: %info = Win32::Sound::DeviceInfo('WAVE_MAPPER'); print "$info{name} version $info{driver_version}\n"; =back =head1 THE WaveOut PACKAGE Win32::Sound also provides a different, more powerful approach to wave audio data with its C package. It has methods to load and then play WAV files, with the additional feature of specifying the start and end range, so you can play only a portion of an audio file. Furthermore, it is possible to load arbitrary binary data to the soundcard to let it play and save them back into WAV files; in a few words, you can do some sound synthesis work. =head2 FUNCTIONS =over =item new Win32::Sound::WaveOut(FILENAME) =item new Win32::Sound::WaveOut(SAMPLERATE, BITS, CHANNELS) =item new Win32::Sound::WaveOut() This function creates a C object; the first form opens the specified wave file (see also C ), so you can directly C it. The second (and third) form opens the wave output device with the format given (or if none given, defaults to 44.1kHz, 16 bits, stereo); to produce something audible you can either C a wave file or C binary data to the soundcard and then C it. =item Close() Closes the wave file currently opened. =item CloseDevice() Closes the wave output device; you can change format and reopen it with C. =item GetErrorText(ERROR) Returns the error text associated with the specified ERROR number; note it only works for wave-output-specific errors. =item Load(DATA) Loads the DATA buffer in the soundcard. The format of the data buffer depends on the format used; for example, with 8 bit mono each sample is one character, while with 16 bit stereo each sample is four characters long (two 16 bit values for left and right channels). The sample rate defines how much samples are in one second of sound. For example, to fit one second at 44.1kHz 16 bit stereo your buffer must contain 176400 bytes (44100 * 4). =item Open(FILE) Opens the specified wave FILE. =item OpenDevice() Opens the wave output device with the current sound format (not needed unless you used C). =item Pause() Pauses the sound currently playing; use C to continue playing. =item Play( [FROM, TO] ) Plays the opened wave file. You can optionally specify a FROM - TO range, where FROM and TO are expressed in samples (or use FROM=0 for the first sample and TO=-1 for the last sample). Playback happens always asynchronously, eg. in the background. =item Position() Returns the sample number currently playing; note that the play position is not zeroed when the sound ends, so you have to call a C between plays to receive the correct position in the current sound. =item Reset() Stops playing and resets the play position (see C). =item Restart() Continues playing the sound paused by C. =item Save(FILE, [DATA]) Writes the DATA buffer (if not given, uses the buffer currently loaded in the soundcard) to the specified wave FILE. =item Status() Returns 0 if the soundcard is currently playing, 1 if it's free, or C on errors. =item Unload() Frees the soundcard from the loaded data. =item Volume( [LEFT, RIGHT] ) Gets or sets the volume for the wave output device. It works the same way as Win32::Sound::Volume. =item Write() Plays the data currently loaded in the soundcard; playback happens always asynchronously, eg. in the background. =back =head2 THE SOUND FORMAT The sound format is stored in three properties of the C object: C, C and C. If you need to change them without creating a new object, you should close before and reopen afterwards the device. $WAV->CloseDevice(); $WAV->{samplerate} = 44100; # 44.1kHz $WAV->{bits} = 8; # 8 bit $WAV->{channels} = 1; # mono $WAV->OpenDevice(); You can also use the properties to query the sound format currently used. =head2 EXAMPLE This small example produces a 1 second sinusoidal wave at 440Hz and saves it in F: use Win32::Sound; # Create the object $WAV = new Win32::Sound::WaveOut(44100, 8, 2); $data = ""; $counter = 0; $increment = 440/44100; # Generate 44100 samples ( = 1 second) for $i (1..44100) { # Calculate the pitch # (range 0..255 for 8 bits) $v = sin($counter/2*3.14) * 128 + 128; # "pack" it twice for left and right $data .= pack("cc", $v, $v); $counter += $increment; } $WAV->Load($data); # get it $WAV->Write(); # hear it 1 until $WAV->Status(); # wait for completion $WAV->Save("sinus.wav"); # write to disk $WAV->Unload(); # drop it =head1 VERSION Win32::Sound version 0.46, 25 Sep 1999. =head1 AUTHOR Aldo Calpini, C Parts of the code provided and/or suggested by Dave Roth. =cut