source: roaraudio/roard/include/output.h @ 5823:f9f70dbaa376

Last change on this file since 5823:f9f70dbaa376 was 5823:f9f70dbaa376, checked in by phi, 11 years ago

updated copyright

File size: 3.5 KB
Line 
1//output.h:
2
3/*
4 *      Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008-2013
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// First rounds the samples count, and makes sure that the outbuffer size is divisible by the framesize (channels * bits/8)
56#define ROAR_OUTPUT_CALC_OUTBUFSIZE(x)   ( \
57                                          ( \
58                                           (int)(ROAR_OUTPUT_BUFFER_SAMPLES * ((float)(x)->rate/g_sa->rate) + 0.5) \
59                                          ) * \
60                                          (x)->channels * ((x)->bits / 8) \
61                                         )
62
63#define ROAR_OUTPUT_CALC_OUTBUFSAMP(x,y) ((y) / ((x)->channels * ((x)->bits / 8)*((float)(x)->rate/g_sa->rate)))
64#define ROAR_OUTPUT_CALC_OUTBUFSIZE_MAX(x0,x1)  (ROAR_OUTPUT_BUFFER_SAMPLES                                  * \
65                                                  ROAR_MAX((x0)->channels,(x1)->channels)                    * \
66                                                 (ROAR_MAX((x0)->bits,    (x1)->bits    ) / 8)               * \
67                                                 (ROAR_MAX((float)(x0)->rate,(float)(x1)->rate)/g_sa->rate)    \
68                                                )
69
70extern void         * g_output_buffer;
71extern void         * g_input_buffer;
72extern size_t         g_output_buffer_len;
73#define        g_input_buffer_len g_output_buffer_len
74
75int output_buffer_init   (struct roar_audio_info * info);
76int output_buffer_reinit (void);
77int output_buffer_free   (void);
78
79int output_add         (char * drv, char * dev, char * opts, int prim, int count);
80int output_add_default (char * drv, char * dev, char * opts, int prim, int count);
81
82#endif
83
84//ll
Note: See TracBrowser for help on using the repository browser.