LXR qemu/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
  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 */
  59