1 | //driver_ao.c: |
---|
2 | |
---|
3 | /* |
---|
4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008 |
---|
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, 675 Mass Ave, Cambridge, MA 02139, USA. |
---|
22 | * |
---|
23 | */ |
---|
24 | |
---|
25 | #include "roard.h" |
---|
26 | #ifdef ROAR_HAVE_LIBAO |
---|
27 | |
---|
28 | int _driver_ao_usage_counter = 0; |
---|
29 | |
---|
30 | void driver_ao_init (void) { |
---|
31 | if ( _driver_ao_usage_counter++ == 0 ) |
---|
32 | ao_initialize(); |
---|
33 | } |
---|
34 | |
---|
35 | void driver_ao_uninit (void) { |
---|
36 | if ( _driver_ao_usage_counter-- == 1 ) |
---|
37 | ao_shutdown(); |
---|
38 | } |
---|
39 | |
---|
40 | int driver_ao_open_vio(struct roar_vio_calls * inst, char * device, struct roar_audio_info * info, int fh) { |
---|
41 | //int driver_ao_open(DRIVER_USERDATA_T * inst, char * device, struct roar_audio_info * info) { |
---|
42 | ao_device * aodevice; |
---|
43 | ao_sample_format format; |
---|
44 | int driver; |
---|
45 | |
---|
46 | ROAR_WARN("The libao driver is obsolete, use another!"); |
---|
47 | |
---|
48 | if ( fh != -1 ) |
---|
49 | return -1; |
---|
50 | |
---|
51 | driver_ao_init(); |
---|
52 | |
---|
53 | if ( device == NULL ) { |
---|
54 | driver = ao_default_driver_id(); |
---|
55 | } else { |
---|
56 | if ( (driver = ao_driver_id(device)) == -1 ) { |
---|
57 | ROAR_ERR("Can not open audio device via libao's driver '%s'", device); |
---|
58 | driver_ao_uninit(); |
---|
59 | return -1; |
---|
60 | } |
---|
61 | } |
---|
62 | |
---|
63 | format.bits = info->bits; |
---|
64 | format.channels = info->channels; |
---|
65 | format.rate = info->rate; |
---|
66 | |
---|
67 | if ( info->bits == 8 ) { |
---|
68 | ROAR_WARN("This is the libao driver in 8 bit mode, It's not known to me if I need to provide data in signed or in unsigned mode. If your musik sounds strange try -oO codec=pcm_s_le or -oO codec=pcm_u_le"); |
---|
69 | /* NOTE: the following is only true for EsounD driver, not for OSS driver, don't know for the others |
---|
70 | switch (info->codec) { |
---|
71 | case ROAR_CODEC_PCM_U_LE: |
---|
72 | case ROAR_CODEC_PCM_U_BE: |
---|
73 | case ROAR_CODEC_PCM_U_PDP: |
---|
74 | format.byte_format = AO_FMT_NATIVE; |
---|
75 | break; |
---|
76 | default: |
---|
77 | ROAR_ERR("Can not open audio device via libao: codec not supported. You may want to try -oO codec=pcm_u_le or -oO codec=pcm,bits=16"); |
---|
78 | driver_ao_uninit(); |
---|
79 | return -1; |
---|
80 | break; |
---|
81 | } |
---|
82 | */ |
---|
83 | } |
---|
84 | |
---|
85 | switch (info->codec) { |
---|
86 | case ROAR_CODEC_PCM_S_LE: |
---|
87 | format.byte_format = AO_FMT_LITTLE; |
---|
88 | break; |
---|
89 | case ROAR_CODEC_PCM_S_BE: |
---|
90 | format.byte_format = AO_FMT_BIG; |
---|
91 | break; |
---|
92 | default: |
---|
93 | ROAR_ERR("Can not open audio device via libao: codec not supported. You may want to try -oO codec=pcm"); |
---|
94 | driver_ao_uninit(); |
---|
95 | return -1; |
---|
96 | break; |
---|
97 | } |
---|
98 | |
---|
99 | aodevice = ao_open_live(driver, &format, NULL /* no options */); |
---|
100 | |
---|
101 | if ( aodevice == NULL ) { |
---|
102 | ROAR_ERR("Can not open audio device via libao."); |
---|
103 | driver_ao_uninit(); |
---|
104 | return -1; |
---|
105 | } |
---|
106 | |
---|
107 | memset(inst, 0, sizeof(struct roar_vio_calls)); |
---|
108 | inst->inst = (void*) aodevice; |
---|
109 | inst->write = driver_ao_write; |
---|
110 | |
---|
111 | return 0; |
---|
112 | } |
---|
113 | |
---|
114 | int driver_ao_close(DRIVER_USERDATA_T inst) { |
---|
115 | |
---|
116 | ao_close((ao_device*)(((struct roar_vio_calls *)inst)->inst)); |
---|
117 | |
---|
118 | driver_ao_uninit(); |
---|
119 | |
---|
120 | return 0; |
---|
121 | } |
---|
122 | |
---|
123 | ssize_t driver_ao_write(struct roar_vio_calls * vio, void *buf, size_t count) { |
---|
124 | if ( ao_play((ao_device*)(vio->inst), buf, count) == 0 ) |
---|
125 | return -1; |
---|
126 | return count; |
---|
127 | } |
---|
128 | |
---|
129 | #endif |
---|
130 | //ll |
---|