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      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 
     31 typedef void (*audio_callback_fn) (void *opaque, int avail);
     32 
     33 typedef 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 
     48 struct audsettings {
     49     int freq;
     50     int nchannels;
     51     audfmt_e fmt;
     52     int endianness;
     53 };
     54 
     55 typedef enum {
     56     AUD_CNOTIFY_ENABLE,
     57     AUD_CNOTIFY_DISABLE
     58 } audcnotification_e;
     59 
     60 struct 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 
     66 struct capture_ops {
     67     void (*info) (void *opaque);
     68     void (*destroy) (void *opaque);
     69 };
     70 
     71 typedef struct CaptureState {
     72     void *opaque;
     73     struct capture_ops ops;
     74     QLIST_ENTRY (CaptureState) entries;
     75 } CaptureState;
     76 
     77 typedef struct SWVoiceOut SWVoiceOut;
     78 typedef struct CaptureVoiceOut CaptureVoiceOut;
     79 typedef struct SWVoiceIn SWVoiceIn;
     80 
     81 typedef struct QEMUSoundCard {
     82     char *name;
     83     QLIST_ENTRY (QEMUSoundCard) entries;
     84 } QEMUSoundCard;
     85 
     86 typedef struct QEMUAudioTimeStamp {
     87     uint64_t old_ts;
     88 } QEMUAudioTimeStamp;
     89 
     90 void AUD_vlog (const char *cap, const char *fmt, va_list ap);
     91 void AUD_log (const char *cap, const char *fmt, ...)
     92 #ifdef __GNUC__
     93     __attribute__ ((__format__ (__printf__, 2, 3)))
     94 #endif
     95     ;
     96 
     97 void AUD_help (void);
     98 void AUD_register_card (const char *name, QEMUSoundCard *card);
     99 void AUD_remove_card (QEMUSoundCard *card);
    100 CaptureVoiceOut *AUD_add_capture (
    101     struct audsettings *as,
    102     struct audio_capture_ops *ops,
    103     void *opaque
    104     );
    105 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque);
    106 
    107 SWVoiceOut *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 
    116 void AUD_close_out (QEMUSoundCard *card, SWVoiceOut *sw);
    117 int  AUD_write (SWVoiceOut *sw, void *pcm_buf, int size);
    118 int  AUD_get_buffer_size_out (SWVoiceOut *sw);
    119 void AUD_set_active_out (SWVoiceOut *sw, int on);
    120 int  AUD_is_active_out (SWVoiceOut *sw);
    121 
    122 void     AUD_init_time_stamp_out (SWVoiceOut *sw, QEMUAudioTimeStamp *ts);
    123 uint64_t AUD_get_elapsed_usec_out (SWVoiceOut *sw, QEMUAudioTimeStamp *ts);
    124 
    125 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol);
    126 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol);
    127 
    128 SWVoiceIn *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 
    137 void AUD_close_in (QEMUSoundCard *card, SWVoiceIn *sw);
    138 int  AUD_read (SWVoiceIn *sw, void *pcm_buf, int size);
    139 void AUD_set_active_in (SWVoiceIn *sw, int on);
    140 int  AUD_is_active_in (SWVoiceIn *sw);
    141 
    142 void     AUD_init_time_stamp_in (SWVoiceIn *sw, QEMUAudioTimeStamp *ts);
    143 uint64_t AUD_get_elapsed_usec_in (SWVoiceIn *sw, QEMUAudioTimeStamp *ts);
    144 
    145 static 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 
    168 int wav_start_capture (CaptureState *s, const char *path, int freq,
    169                        int bits, int nchannels);
    170 
    171 extern int
    172 audio_get_backend_count( int  is_input );
    173 
    174 extern const char*
    175 audio_get_backend_name( int   is_input, int  index, const char*  *pinfo );
    176 
    177 extern int
    178 audio_check_backend_name( int  is_input, const char*  name );
    179 
    180 #endif  /* audio.h */
    181