1SDL::AudioCVT(3)      User Contributed Perl Documentation     SDL::AudioCVT(3)
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NAME

6       SDL::AudioCVT -- Audio Conversion Structure
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CATEGORY

9       Core, Audio, Structure
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SYNOPSIS

DESCRIPTION
13       The "SDL::AudioCVT" is used to convert audio data between different
14       formats. A "SDL::AudioCVT" structure is created with the
15       "SDL::AudioCVT-"build> function, while the actual conversion is done by
16       the "SDL::Audio::convert_audio" function.
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METHODS
19   new
20       This constructor returns an empty "SDL::AudioCVT" structure.
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22   build
23        $cvt = SDL::AudioCVT->build( $src_format, $src_channels, $src_rate
24                                     $dst_format, $dst_channels, $dst_rate );
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26       Before an "SDL::AudioCVT" structure can be used to convert audio data
27       it must be initialized with source and destination information.
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29       "src_format" and "dst_format" are the source and destination format of
30       the conversion. (For information on audio formats see
31       "SDL::AudioSpec"). "src_channels" and "dst_channels" are the number of
32       channels in the source and destination formats.  Finally, "src_rate"
33       and "dst_rate" are the frequency or samples-per-second of the source
34       and destination formats. Once again, see "SDL::AudioSpec".
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36       Currently (SDL-1.2.11) only rate conversions of 2x and (1/2)x with x >
37       0 are done, nearing the requested rate conversion.
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39       See "SDL::Audio::convert_audio".
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41   needed
42       Set to one if the conversion is possible
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44   src_format
45       Audio format of the source
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47   dest_format
48       Audio format of the destination
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50   rate_incr
51       Rate conversion increment
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53   len
54       Length of the original audio buffer in bytes
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56   len_cvt
57       Length of converted audio buffer in bytes (calculated)
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59   len_mult
60       "buf" must be "len*len_mult" bytes in size (calculated)
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62   len_ratio
63       Final audio size is "len*len_ratio"
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AUTHORS
66       See "AUTHORS" in SDL.
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70perl v5.30.0                      2019-07-26                  SDL::AudioCVT(3)



        

    


            
        

        

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