SDL_AudioCVT

SDL_AudioCVT

NAME STRUCTURE DEFINITION STRUCTURE DATA DESCRIPTION SEE ALSO

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?