include/SDL_audio.h
branchgsoc2008_audio_resampling
changeset 2655 b8e736c8a5a8
parent 2049 5f6550e5184f
child 2656 dd74182b3c3c
     1.1 --- a/include/SDL_audio.h	Wed Apr 23 06:26:21 2008 +0000
     1.2 +++ b/include/SDL_audio.h	Wed Jun 18 04:51:10 2008 +0000
     1.3 @@ -142,10 +142,15 @@
     1.4      SDL_AudioFormat dst_format; /* Target audio format */
     1.5      double rate_incr;           /* Rate conversion increment */
     1.6      Uint8 *buf;                 /* Buffer to hold entire audio data */
     1.7 +	Uint8 *sinc;				/* Windowed sinc filter */
     1.8 +	Uint8 *state_buf;			/* Sample history for either the FIR or IIR filter */
     1.9 +	int state_pos;				/* Position in the state */
    1.10 +	int len_sinc;				/* Length of windowed sinc filter, in appropriate units (not necessarily bytes) */
    1.11      int len;                    /* Length of original audio buffer */
    1.12      int len_cvt;                /* Length of converted audio buffer */
    1.13      int len_mult;               /* buffer must be len*len_mult big */
    1.14 -    double len_ratio;           /* Given len, final size is len*len_ratio */
    1.15 +	int len_div;				/* desination length = len_mult / len_div * src length */
    1.16 +    double len_ratio;           /* Given len, final size is len*len_ratio ( len_ratio = len_mult / len_div ) */
    1.17      SDL_AudioFilter filters[10];        /* Filter list */
    1.18      int filter_index;           /* Current audio conversion function */
    1.19  } SDL_AudioCVT;