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 mixeng_real;

    29 struct mixeng_volume { int mute; mixeng_real r; mixeng_real l; };

    30 struct mixeng_sample { mixeng_real l; mixeng_real r; };

    31 #else

    32 struct mixeng_volume { int mute; int64_t r; int64_t l; };

    33 struct st_sample { int64_t l; int64_t r; };

    34 #endif

    35 

    36 typedef void (t_sample) (struct st_sample *dst, const void *src,

    37                          int samples, struct mixeng_volume *vol);

    38 typedef void (f_sample) (void *dst, const struct st_sample *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, struct st_sample *ibuf, struct st_sample *obuf,

    45                    int *isamp, int *osamp);

    46 void st_rate_flow_mix (void *opaque, struct st_sample *ibuf, struct st_sample *obuf,

    47                        int *isamp, int *osamp);

    48 void st_rate_stop (void *opaque);

    49 void mixeng_clear (struct st_sample *buf, int len);

    50 

    51 #endif  /* mixeng.h */