audio/audio.h

   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 "sys-queue.h"
  29
  30 typedef void (*audio_callback_fn_t) (void *opaque, int avail);
  31
  32 typedef enum {
  33     AUD_FMT_U8,
  34     AUD_FMT_S8,
  35     AUD_FMT_U16,
  36     AUD_FMT_S16,
  37     AUD_FMT_U32,
  38     AUD_FMT_S32
  39 } audfmt_e;
  40
  41 #ifdef WORDS_BIGENDIAN
  42 #define AUDIO_HOST_ENDIANNESS 1
  43 #else
  44 #define AUDIO_HOST_ENDIANNESS 0
  45 #endif
  46
  47 struct audsettings {
  48     int freq;
  49     int nchannels;
  50     audfmt_e fmt;
  51     int endianness;
  52 };
  53
  54 typedef enum {
  55     AUD_CNOTIFY_ENABLE,
  56     AUD_CNOTIFY_DISABLE
  57 } audcnotification_e;
  58
  59 struct audio_capture_ops {
  60     void (*notify) (void *opaque, audcnotification_e cmd);
  61     void (*capture) (void *opaque, void *buf, int size);
  62     void (*destroy) (void *opaque);
  63 };
  64
  65 struct capture_ops {
  66     void (*info) (void *opaque);
  67     void (*destroy) (void *opaque);
  68 };
  69
  70 typedef struct CaptureState {
  71     void *opaque;
  72     struct capture_ops ops;
  73     LIST_ENTRY (CaptureState) entries;
  74 } CaptureState;
  75
  76 typedef struct SWVoiceOut SWVoiceOut;
  77 typedef struct CaptureVoiceOut CaptureVoiceOut;
  78 typedef struct SWVoiceIn SWVoiceIn;
  79
  80 typedef struct QEMUSoundCard {
  81     AudioState *audio;
  82     char *name;
  83     LIST_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 AudioState *AUD_init (void);
  98 void AUD_help (void);
  99 void AUD_register_card (AudioState *s, const char *name, QEMUSoundCard *card);
 100 void AUD_remove_card (QEMUSoundCard *card);
 101 CaptureVoiceOut *AUD_add_capture (
 102     AudioState *s,
 103     struct audsettings *as,
 104     struct audio_capture_ops *ops,
 105     void *opaque
 106     );
 107 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque);
 108
 109 SWVoiceOut *AUD_open_out (
 110     QEMUSoundCard *card,
 111     SWVoiceOut *sw,
 112     const char *name,
 113     void *callback_opaque,
 114     audio_callback_fn_t callback_fn,
 115     struct audsettings *settings
 116     );
 117
 118 void AUD_close_out (QEMUSoundCard *card, SWVoiceOut *sw);
 119 int  AUD_write (SWVoiceOut *sw, void *pcm_buf, int size);
 120 int  AUD_get_buffer_size_out (SWVoiceOut *sw);
 121 void AUD_set_active_out (SWVoiceOut *sw, int on);
 122 int  AUD_is_active_out (SWVoiceOut *sw);
 123
 124 void     AUD_init_time_stamp_out (SWVoiceOut *sw, QEMUAudioTimeStamp *ts);
 125 uint64_t AUD_get_elapsed_usec_out (SWVoiceOut *sw, QEMUAudioTimeStamp *ts);
 126
 127 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol);
 128 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol);
 129
 130 SWVoiceIn *AUD_open_in (
 131     QEMUSoundCard *card,
 132     SWVoiceIn *sw,
 133     const char *name,
 134     void *callback_opaque,
 135     audio_callback_fn_t callback_fn,
 136     struct audsettings *settings
 137     );
 138
 139 void AUD_close_in (QEMUSoundCard *card, SWVoiceIn *sw);
 140 int  AUD_read (SWVoiceIn *sw, void *pcm_buf, int size);
 141 void AUD_set_active_in (SWVoiceIn *sw, int on);
 142 int  AUD_is_active_in (SWVoiceIn *sw);
 143
 144 void     AUD_init_time_stamp_in (SWVoiceIn *sw, QEMUAudioTimeStamp *ts);
 145 uint64_t AUD_get_elapsed_usec_in (SWVoiceIn *sw, QEMUAudioTimeStamp *ts);
 146
 147 static inline void *advance (void *p, int incr)
 148 {
 149     uint8_t *d = p;
 150     return (d + incr);
 151 }
 152
 153 uint32_t popcount (uint32_t u);
 154 uint32_t lsbindex (uint32_t u);
 155
 156 #ifdef __GNUC__
 157 #define audio_MIN(a, b) ( __extension__ ({      \
 158     __typeof (a) ta = a;                        \
 159     __typeof (b) tb = b;                        \
 160     ((ta)>(tb)?(tb):(ta));                      \
 161 }))
 162
 163 #define audio_MAX(a, b) ( __extension__ ({      \
 164     __typeof (a) ta = a;                        \
 165     __typeof (b) tb = b;                        \
 166     ((ta)<(tb)?(tb):(ta));                      \
 167 }))
 168 #else
 169 #define audio_MIN(a, b) ((a)>(b)?(b):(a))
 170 #define audio_MAX(a, b) ((a)<(b)?(b):(a))
 171 #endif
 172
 173 int wav_start_capture (CaptureState *s, const char *path, int freq,
 174                        int bits, int nchannels);
 175
 176 #endif  /* audio.h */