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"