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Man Pages


Manual Reference Pages  -  SDL_AUDIOCVT (3)

NAME

SDL_AudioCVT - Audio Conversion Structure

CONTENTS

STRUCTURE DEFINITION

typedef struct{
  int needed;
  Uint16 src_format;
  Uint16 dest_format;
  double rate_incr;
  Uint8 *buf;
  int len;
  int len_cvt;
  int len_mult;
  double len_ratio;
  void (*filters[10])(struct SDL_AudioCVT *cvt, Uint16 format);
  int filter_index;
} SDL_AudioCVT;

STRUCTURE DATA

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
buf Audio buffer
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
filters[10](..) Pointers to functions needed for this conversion
filter_index Current conversion function

DESCRIPTION

The SDL_AudioCVT is used to convert audio data between different formats. A SDL_AudioCVT structure is created with the SDL_BuildAudioCVT function, while the actual conversion is done by the SDL_ConvertAudio function.

Many of the fields in the SDL_AudioCVT structure should be considered private and their function will not be discussed here.
Uint8 *buf
int len
int len_mult
double len_ratio

SEE ALSO

SDL_BuildAudioCVT, SDL_ConvertAudio, SDL_AudioSpec

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SDL SDL_AUDIOCVT (3) Tue 11 Sep 2001, 22:58

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