mixeng.h (2418B)
1 /* 2 * QEMU Mixing engine header 3 * 4 * Copyright (c) 2004-2005 Vassili Karpov (malc) 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 25 #ifndef QEMU_MIXENG_H 26 #define QEMU_MIXENG_H 27 28 #ifdef FLOAT_MIXENG 29 typedef float mixeng_real; 30 struct mixeng_volume { int mute; mixeng_real r; mixeng_real l; }; 31 struct st_sample { mixeng_real l; mixeng_real r; }; 32 #else 33 struct mixeng_volume { int mute; int64_t r; int64_t l; }; 34 struct st_sample { int64_t l; int64_t r; }; 35 #endif 36 typedef struct st_sample st_sample; 37 38 typedef void (t_sample) (struct st_sample *dst, const void *src, int samples); 39 typedef void (f_sample) (void *dst, const struct st_sample *src, int samples); 40 41 /* indices: [stereo][signed][swap endiannes][8, 16 or 32-bits] */ 42 extern t_sample *mixeng_conv[2][2][2][3]; 43 extern f_sample *mixeng_clip[2][2][2][3]; 44 45 /* indices: [stereo] */ 46 extern t_sample *mixeng_conv_float[2]; 47 extern f_sample *mixeng_clip_float[2]; 48 49 void *st_rate_start (int inrate, int outrate); 50 void st_rate_flow(void *opaque, st_sample *ibuf, st_sample *obuf, 51 size_t *isamp, size_t *osamp); 52 void st_rate_flow_mix(void *opaque, st_sample *ibuf, st_sample *obuf, 53 size_t *isamp, size_t *osamp); 54 void st_rate_stop (void *opaque); 55 void mixeng_clear (struct st_sample *buf, int len); 56 void mixeng_volume (struct st_sample *buf, int len, struct mixeng_volume *vol); 57 58 #endif /* QEMU_MIXENG_H */