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sdl::audiocvt

pods::SDL::AudioCVT(3pm)				User Contributed Perl Documentation				  pods::SDL::AudioCVT(3pm)

NAME

       SDL::AudioCVT -- Audio Conversion Structure

CATEGORY

       Core, Audio, Structure

SYNOPSIS

DESCRIPTION

       The "SDL::AudioCVT" is used to convert audio data between different formats. A "SDL::AudioCVT" structure is created with the
       "SDL::AudioCVT-"build> function, while the actual conversion is done by the "SDL::Audio::convert_audio" function.

METHODS

   new
       This constructor returns an empty "SDL::AudioCVT" structure.

   build
	$cvt = SDL::AudioCVT->build( $src_format, $src_channels, $src_rate
				     $dst_format, $dst_channels, $dst_rate );

       Before an "SDL::AudioCVT" structure can be used to convert audio data it must be initialized with source and destination information.

       "src_format" and "dst_format" are the source and destination format of the conversion. (For information on audio formats see
       "SDL::AudioSpec"). "src_channels" and "dst_channels" are the number of channels in the source and destination formats.  Finally, "src_rate"
       and "dst_rate" are the frequency or samples-per-second of the source and destination formats. Once again, see "SDL::AudioSpec".

       Currently (SDL-1.2.11) only rate conversions of 2x and (1/2)x with x > 0 are done, nearing the requested rate conversion.

       See "SDL::Audio::convert_audio".

   needed
       Set to one if the conversion is possible

   src_format
       Audio format of the source

   dest_format
       Audio format of the destination

   rate_incr
       Rate conversion increment

   len
       Length of the original audio buffer in bytes

   len_cvt
       Length of converted audio buffer in bytes (calculated)

   len_mult
       "buf" must be "len*len_mult" bytes in size (calculated)

   len_ratio
       Final audio size is "len*len_ratio"

AUTHORS

       See "AUTHORS" in SDL.

perl v5.14.2							    2012-05-28						  pods::SDL::AudioCVT(3pm)

Programming