SDL_AudioCVT(3) SDL API Reference SDL_AudioCVT(3)

NAME

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

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