SDL_AudioCVT man page

SDL_AudioCVT — Audio Conversion Structure

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

Info

Tue 11 Sep 2001, 22:58 SDL SDL API Reference