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 "qemu/queue.h"
  29
  30 typedef void (*audio_callback_fn) (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 HOST_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     QLIST_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     char *name;
  82     QLIST_ENTRY (QEMUSoundCard) entries;
  83 } QEMUSoundCard;
  84
  85 typedef struct QEMUAudioTimeStamp {
  86     uint64_t old_ts;
  87 } QEMUAudioTimeStamp;
  88
  89 void AUD_vlog (const char *cap, const char *fmt, va_list ap) GCC_FMT_ATTR(2, 0);
  90 void AUD_log (const char *cap, const char *fmt, ...) GCC_FMT_ATTR(2, 3);
  91
  92 void AUD_help (void);
  93 void AUD_register_card (const char *name, QEMUSoundCard *card);
  94 void AUD_remove_card (QEMUSoundCard *card);
  95 CaptureVoiceOut *AUD_add_capture (
  96     struct audsettings *as,
  97     struct audio_capture_ops *ops,
  98     void *opaque
  99     );
 100 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque);
 101
 102 SWVoiceOut *AUD_open_out (
 103     QEMUSoundCard *card,
 104     SWVoiceOut *sw,
 105     const char *name,
 106     void *callback_opaque,
 107     audio_callback_fn callback_fn,
 108     struct audsettings *settings
 109     );
 110
 111 void AUD_close_out (QEMUSoundCard *card, SWVoiceOut *sw);
 112 int  AUD_write (SWVoiceOut *sw, void *pcm_buf, int size);
 113 int  AUD_get_buffer_size_out (SWVoiceOut *sw);
 114 void AUD_set_active_out (SWVoiceOut *sw, int on);
 115 int  AUD_is_active_out (SWVoiceOut *sw);
 116
 117 void     AUD_init_time_stamp_out (SWVoiceOut *sw, QEMUAudioTimeStamp *ts);
 118 uint64_t AUD_get_elapsed_usec_out (SWVoiceOut *sw, QEMUAudioTimeStamp *ts);
 119
 120 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol);
 121 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol);
 122
 123 SWVoiceIn *AUD_open_in (
 124     QEMUSoundCard *card,
 125     SWVoiceIn *sw,
 126     const char *name,
 127     void *callback_opaque,
 128     audio_callback_fn callback_fn,
 129     struct audsettings *settings
 130     );
 131
 132 void AUD_close_in (QEMUSoundCard *card, SWVoiceIn *sw);
 133 int  AUD_read (SWVoiceIn *sw, void *pcm_buf, int size);
 134 void AUD_set_active_in (SWVoiceIn *sw, int on);
 135 int  AUD_is_active_in (SWVoiceIn *sw);
 136
 137 void     AUD_init_time_stamp_in (SWVoiceIn *sw, QEMUAudioTimeStamp *ts);
 138 uint64_t AUD_get_elapsed_usec_in (SWVoiceIn *sw, QEMUAudioTimeStamp *ts);
 139
 140 static inline void *advance (void *p, int incr)
 141 {
 142     uint8_t *d = p;
 143     return (d + incr);
 144 }
 145
 146 #ifdef __GNUC__
 147 #define audio_MIN(a, b) ( __extension__ ({      \
 148     __typeof (a) ta = a;                        \
 149     __typeof (b) tb = b;                        \
 150     ((ta)>(tb)?(tb):(ta));                      \
 151 }))
 152
 153 #define audio_MAX(a, b) ( __extension__ ({      \
 154     __typeof (a) ta = a;                        \
 155     __typeof (b) tb = b;                        \
 156     ((ta)<(tb)?(tb):(ta));                      \
 157 }))
 158 #else
 159 #define audio_MIN(a, b) ((a)>(b)?(b):(a))
 160 #define audio_MAX(a, b) ((a)<(b)?(b):(a))
 161 #endif
 162
 163 int wav_start_capture (CaptureState *s, const char *path, int freq,
 164                        int bits, int nchannels);
 165
 166 #endif  /* audio.h */