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