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 29typedef float mixeng_real; 30struct mixeng_volume { int mute; mixeng_real r; mixeng_real l; }; 31struct st_sample { mixeng_real l; mixeng_real r; }; 32#else 33struct mixeng_volume { int mute; int64_t r; int64_t l; }; 34struct st_sample { int64_t l; int64_t r; }; 35#endif 36typedef struct st_sample st_sample; 37 38typedef void (t_sample) (struct st_sample *dst, const void *src, int samples); 39typedef void (f_sample) (void *dst, const struct st_sample *src, int samples); 40 41/* indices: [stereo][signed][swap endiannes][8, 16 or 32-bits] */ 42extern t_sample *mixeng_conv[2][2][2][3]; 43extern f_sample *mixeng_clip[2][2][2][3]; 44 45/* indices: [stereo] */ 46extern t_sample *mixeng_conv_float[2]; 47extern f_sample *mixeng_clip_float[2]; 48 49void *st_rate_start (int inrate, int outrate); 50void st_rate_flow(void *opaque, st_sample *ibuf, st_sample *obuf, 51 size_t *isamp, size_t *osamp); 52void st_rate_flow_mix(void *opaque, st_sample *ibuf, st_sample *obuf, 53 size_t *isamp, size_t *osamp); 54void st_rate_stop (void *opaque); 55void mixeng_clear (struct st_sample *buf, int len); 56void mixeng_volume (struct st_sample *buf, int len, struct mixeng_volume *vol); 57 58#endif /* QEMU_MIXENG_H */