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 (calcu
- lated)
- 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