audio/mixeng.h

   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 #ifndef QEMU_MIXENG_H
  25 #define QEMU_MIXENG_H
  26
  27 #ifdef FLOAT_MIXENG
  28 typedef float real_t;
  29 typedef struct { int mute; real_t r; real_t l; } volume_t;
  30 typedef struct { real_t l; real_t r; } st_sample_t;
  31 #else
  32 typedef struct { int mute; int64_t r; int64_t l; } volume_t;
  33 typedef struct { int64_t l; int64_t r; } st_sample_t;
  34 #endif
  35
  36 typedef void (t_sample) (st_sample_t *dst, const void *src,
  37                          int samples, volume_t *vol);
  38 typedef void (f_sample) (void *dst, const st_sample_t *src, int samples);
  39
  40 extern t_sample *mixeng_conv[2][2][2][3];
  41 extern f_sample *mixeng_clip[2][2][2][3];
  42
  43 void *st_rate_start (int inrate, int outrate);
  44 void st_rate_flow (void *opaque, st_sample_t *ibuf, st_sample_t *obuf,
  45                    int *isamp, int *osamp);
  46 void st_rate_flow_mix (void *opaque, st_sample_t *ibuf, st_sample_t *obuf,
  47                        int *isamp, int *osamp);
  48 void st_rate_stop (void *opaque);
  49 void mixeng_clear (st_sample_t *buf, int len);
  50
  51 #endif  /* mixeng.h */