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comparison include/SDL_audio.h @ 2655:b8e736c8a5a8 gsoc2008_audio_resampling

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Added beginnings of resampling code.
author Aaron Wishnick <schnarf@gmail.com>
date Wed, 18 Jun 2008 04:51:10 +0000
parents 5f6550e5184f
children dd74182b3c3c
comparison
equal deleted inserted replaced
2654:2e14bdaaff18 2655:b8e736c8a5a8
140 int needed; /* Set to 1 if conversion possible */ 140 int needed; /* Set to 1 if conversion possible */
141 SDL_AudioFormat src_format; /* Source audio format */ 141 SDL_AudioFormat src_format; /* Source audio format */
142 SDL_AudioFormat dst_format; /* Target audio format */ 142 SDL_AudioFormat dst_format; /* Target audio format */
143 double rate_incr; /* Rate conversion increment */ 143 double rate_incr; /* Rate conversion increment */
144 Uint8 *buf; /* Buffer to hold entire audio data */ 144 Uint8 *buf; /* Buffer to hold entire audio data */
145 Uint8 *sinc; /* Windowed sinc filter */
146 Uint8 *state_buf; /* Sample history for either the FIR or IIR filter */
147 int state_pos; /* Position in the state */
148 int len_sinc; /* Length of windowed sinc filter, in appropriate units (not necessarily bytes) */
145 int len; /* Length of original audio buffer */ 149 int len; /* Length of original audio buffer */
146 int len_cvt; /* Length of converted audio buffer */ 150 int len_cvt; /* Length of converted audio buffer */
147 int len_mult; /* buffer must be len*len_mult big */ 151 int len_mult; /* buffer must be len*len_mult big */
148 double len_ratio; /* Given len, final size is len*len_ratio */ 152 int len_div; /* desination length = len_mult / len_div * src length */
153 double len_ratio; /* Given len, final size is len*len_ratio ( len_ratio = len_mult / len_div ) */
149 SDL_AudioFilter filters[10]; /* Filter list */ 154 SDL_AudioFilter filters[10]; /* Filter list */
150 int filter_index; /* Current audio conversion function */ 155 int filter_index; /* Current audio conversion function */
151 } SDL_AudioCVT; 156 } SDL_AudioCVT;
152 157
153 158