1/*
2 * QEMU Audio subsystem header
3 *
4 * Copyright (c) 2003-2005 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_AUDIO_H
25#define QEMU_AUDIO_H
26
27#include "config-host.h"
28#include "qemu-queue.h"
29#include "qemu-common.h"  /* For QEMUTimer */
30
31typedef void (*audio_callback_fn) (void *opaque, int avail);
32
33typedef enum {
34    AUD_FMT_U8,
35    AUD_FMT_S8,
36    AUD_FMT_U16,
37    AUD_FMT_S16,
38    AUD_FMT_U32,
39    AUD_FMT_S32
40} audfmt_e;
41
42#ifdef HOST_WORDS_BIGENDIAN
43#define AUDIO_HOST_ENDIANNESS 1
44#else
45#define AUDIO_HOST_ENDIANNESS 0
46#endif
47
48struct audsettings {
49    int freq;
50    int nchannels;
51    audfmt_e fmt;
52    int endianness;
53};
54
55typedef enum {
56    AUD_CNOTIFY_ENABLE,
57    AUD_CNOTIFY_DISABLE
58} audcnotification_e;
59
60struct audio_capture_ops {
61    void (*notify) (void *opaque, audcnotification_e cmd);
62    void (*capture) (void *opaque, void *buf, int size);
63    void (*destroy) (void *opaque);
64};
65
66struct capture_ops {
67    void (*info) (void *opaque);
68    void (*destroy) (void *opaque);
69};
70
71typedef struct CaptureState {
72    void *opaque;
73    struct capture_ops ops;
74    QLIST_ENTRY (CaptureState) entries;
75} CaptureState;
76
77typedef struct SWVoiceOut SWVoiceOut;
78typedef struct CaptureVoiceOut CaptureVoiceOut;
79typedef struct SWVoiceIn SWVoiceIn;
80
81typedef struct QEMUSoundCard {
82    char *name;
83    QLIST_ENTRY (QEMUSoundCard) entries;
84} QEMUSoundCard;
85
86typedef struct QEMUAudioTimeStamp {
87    uint64_t old_ts;
88} QEMUAudioTimeStamp;
89
90void AUD_vlog (const char *cap, const char *fmt, va_list ap);
91void AUD_log (const char *cap, const char *fmt, ...)
92#ifdef __GNUC__
93    __attribute__ ((__format__ (__printf__, 2, 3)))
94#endif
95    ;
96
97void AUD_help (void);
98void AUD_register_card (const char *name, QEMUSoundCard *card);
99void AUD_remove_card (QEMUSoundCard *card);
100CaptureVoiceOut *AUD_add_capture (
101    struct audsettings *as,
102    struct audio_capture_ops *ops,
103    void *opaque
104    );
105void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque);
106
107SWVoiceOut *AUD_open_out (
108    QEMUSoundCard *card,
109    SWVoiceOut *sw,
110    const char *name,
111    void *callback_opaque,
112    audio_callback_fn callback_fn,
113    struct audsettings *settings
114    );
115
116void AUD_close_out (QEMUSoundCard *card, SWVoiceOut *sw);
117int  AUD_write (SWVoiceOut *sw, void *pcm_buf, int size);
118int  AUD_get_buffer_size_out (SWVoiceOut *sw);
119void AUD_set_active_out (SWVoiceOut *sw, int on);
120int  AUD_is_active_out (SWVoiceOut *sw);
121
122void     AUD_init_time_stamp_out (SWVoiceOut *sw, QEMUAudioTimeStamp *ts);
123uint64_t AUD_get_elapsed_usec_out (SWVoiceOut *sw, QEMUAudioTimeStamp *ts);
124
125void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol);
126void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol);
127
128SWVoiceIn *AUD_open_in (
129    QEMUSoundCard *card,
130    SWVoiceIn *sw,
131    const char *name,
132    void *callback_opaque,
133    audio_callback_fn callback_fn,
134    struct audsettings *settings
135    );
136
137void AUD_close_in (QEMUSoundCard *card, SWVoiceIn *sw);
138int  AUD_read (SWVoiceIn *sw, void *pcm_buf, int size);
139void AUD_set_active_in (SWVoiceIn *sw, int on);
140int  AUD_is_active_in (SWVoiceIn *sw);
141
142void     AUD_init_time_stamp_in (SWVoiceIn *sw, QEMUAudioTimeStamp *ts);
143uint64_t AUD_get_elapsed_usec_in (SWVoiceIn *sw, QEMUAudioTimeStamp *ts);
144
145static inline void *advance (void *p, int incr)
146{
147    uint8_t *d = p;
148    return (d + incr);
149}
150
151#ifdef __GNUC__
152#define audio_MIN(a, b) ( __extension__ ({      \
153    __typeof (a) ta = a;                        \
154    __typeof (b) tb = b;                        \
155    ((ta)>(tb)?(tb):(ta));                      \
156}))
157
158#define audio_MAX(a, b) ( __extension__ ({      \
159    __typeof (a) ta = a;                        \
160    __typeof (b) tb = b;                        \
161    ((ta)<(tb)?(tb):(ta));                      \
162}))
163#else
164#define audio_MIN(a, b) ((a)>(b)?(b):(a))
165#define audio_MAX(a, b) ((a)<(b)?(b):(a))
166#endif
167
168int wav_start_capture (CaptureState *s, const char *path, int freq,
169                       int bits, int nchannels);
170
171extern int
172audio_get_backend_count( int  is_input );
173
174extern const char*
175audio_get_backend_name( int   is_input, int  index, const char*  *pinfo );
176
177extern int
178audio_check_backend_name( int  is_input, const char*  name );
179
180#endif  /* audio.h */
181