1 | //output.h: |
---|
2 | |
---|
3 | /* |
---|
4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008-2010 |
---|
5 | * |
---|
6 | * This file is part of roard a part of RoarAudio, |
---|
7 | * a cross-platform sound system for both, home and professional use. |
---|
8 | * See README for details. |
---|
9 | * |
---|
10 | * This file is free software; you can redistribute it and/or modify |
---|
11 | * it under the terms of the GNU General Public License version 3 |
---|
12 | * as published by the Free Software Foundation. |
---|
13 | * |
---|
14 | * RoarAudio is distributed in the hope that it will be useful, |
---|
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
---|
17 | * GNU General Public License for more details. |
---|
18 | * |
---|
19 | * You should have received a copy of the GNU General Public License |
---|
20 | * along with this software; see the file COPYING. If not, write to |
---|
21 | * the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
---|
22 | * Boston, MA 02110-1301, USA. |
---|
23 | * |
---|
24 | */ |
---|
25 | |
---|
26 | #ifndef _OUTPUT_H_ |
---|
27 | #define _OUTPUT_H_ |
---|
28 | |
---|
29 | #include <roaraudio.h> |
---|
30 | |
---|
31 | // NOTE: we do not set ROAR_OUTPUT_BUFFER_SAMPLES depending on DEBUG anymore |
---|
32 | // as it caused a lot problems with partly enabled debugging |
---|
33 | |
---|
34 | #ifdef ROAR_OUTPUT_CFREQ |
---|
35 | #define ROAR_OUTPUT_BUFFER_SAMPLES (ROAR_RATE_DEFAULT/ROAR_OUTPUT_CFREQ) |
---|
36 | #else |
---|
37 | // in normal case we use 100 cycles per sec, as we do not know the sample |
---|
38 | // rate at compile time we guess it's normaly the default rate. |
---|
39 | // on OpenBSD we need to set a lower freq, use 20 cycles per sec here as |
---|
40 | // it seems to work. |
---|
41 | // FIXME: find out what the problem is and how to fix |
---|
42 | #ifdef ROAR_OS_OPENBSD |
---|
43 | #define ROAR_OUTPUT_BUFFER_SAMPLES (ROAR_RATE_DEFAULT/20) |
---|
44 | #define ROAR_OUTPUT_CFREQ 20 |
---|
45 | #else |
---|
46 | #define ROAR_OUTPUT_BUFFER_SAMPLES (ROAR_RATE_DEFAULT/100) |
---|
47 | #define ROAR_OUTPUT_CFREQ 100 |
---|
48 | #endif |
---|
49 | |
---|
50 | #endif |
---|
51 | |
---|
52 | #define ROAR_OUTPUT_WRITE_SIZE 1024 |
---|
53 | |
---|
54 | #define ROAR_OUTPUT_CALC_OUTBUFSIZE(x) (ROAR_OUTPUT_BUFFER_SAMPLES * (x)->channels * ((x)->bits / 8) * ((float)(x)->rate/g_sa->rate)) |
---|
55 | #define ROAR_OUTPUT_CALC_OUTBUFSAMP(x,y) ((y) / ((x)->channels * ((x)->bits / 8)*((float)(x)->rate/g_sa->rate))) |
---|
56 | #define ROAR_OUTPUT_CALC_OUTBUFSIZE_MAX(x0,x1) (ROAR_OUTPUT_BUFFER_SAMPLES * \ |
---|
57 | ROAR_MAX((x0)->channels,(x1)->channels) * \ |
---|
58 | (ROAR_MAX((x0)->bits, (x1)->bits ) / 8) * \ |
---|
59 | (ROAR_MAX((float)(x0)->rate,(float)(x1)->rate)/g_sa->rate) \ |
---|
60 | ) |
---|
61 | |
---|
62 | void * g_output_buffer; |
---|
63 | unsigned int g_output_buffer_len; |
---|
64 | |
---|
65 | int output_buffer_init (struct roar_audio_info * info); |
---|
66 | int output_buffer_reinit (void); |
---|
67 | int output_buffer_free (void); |
---|
68 | |
---|
69 | int output_buffer_flush (DRIVER_USERDATA_T inst, int driver); |
---|
70 | |
---|
71 | #endif |
---|
72 | |
---|
73 | //ll |
---|