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
  25 #ifndef QEMU_AUDIO_H
  26 #define QEMU_AUDIO_H
  27
  28 #include "qemu/queue.h"
  29 #include "qapi/qapi-types-audio.h"
  30
  31 typedef void (*audio_callback_fn) (void *opaque, int avail);
  32
  33 #ifdef HOST_WORDS_BIGENDIAN
  34 #define AUDIO_HOST_ENDIANNESS 1
  35 #else
  36 #define AUDIO_HOST_ENDIANNESS 0
  37 #endif
  38
  39 struct audsettings {
  40     int freq;
  41     int nchannels;
  42     AudioFormat fmt;
  43     int endianness;
  44 };
  45
  46 typedef enum {
  47     AUD_CNOTIFY_ENABLE,
  48     AUD_CNOTIFY_DISABLE
  49 } audcnotification_e;
  50
  51 struct audio_capture_ops {
  52     void (*notify) (void *opaque, audcnotification_e cmd);
  53     void (*capture) (void *opaque, void *buf, int size);
  54     void (*destroy) (void *opaque);
  55 };
  56
  57 struct capture_ops {
  58     void (*info) (void *opaque);
  59     void (*destroy) (void *opaque);
  60 };
  61
  62 typedef struct CaptureState {
  63     void *opaque;
  64     struct capture_ops ops;
  65     QLIST_ENTRY (CaptureState) entries;
  66 } CaptureState;
  67
  68 typedef struct SWVoiceOut SWVoiceOut;
  69 typedef struct CaptureVoiceOut CaptureVoiceOut;
  70 typedef struct SWVoiceIn SWVoiceIn;
  71
  72 typedef struct QEMUSoundCard {
  73     char *name;
  74     QLIST_ENTRY (QEMUSoundCard) entries;
  75 } QEMUSoundCard;
  76
  77 typedef struct QEMUAudioTimeStamp {
  78     uint64_t old_ts;
  79 } QEMUAudioTimeStamp;
  80
  81 void AUD_vlog (const char *cap, const char *fmt, va_list ap) GCC_FMT_ATTR(2, 0);
  82 void AUD_log (const char *cap, const char *fmt, ...) GCC_FMT_ATTR(2, 3);
  83
  84 void AUD_help (void);
  85 void AUD_register_card (const char *name, QEMUSoundCard *card);
  86 void AUD_remove_card (QEMUSoundCard *card);
  87 CaptureVoiceOut *AUD_add_capture (
  88     struct audsettings *as,
  89     struct audio_capture_ops *ops,
  90     void *opaque
  91     );
  92 void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque);
  93
  94 SWVoiceOut *AUD_open_out (
  95     QEMUSoundCard *card,
  96     SWVoiceOut *sw,
  97     const char *name,
  98     void *callback_opaque,
  99     audio_callback_fn callback_fn,
 100     struct audsettings *settings
 101     );
 102
 103 void AUD_close_out (QEMUSoundCard *card, SWVoiceOut *sw);
 104 int  AUD_write (SWVoiceOut *sw, void *pcm_buf, int size);
 105 int  AUD_get_buffer_size_out (SWVoiceOut *sw);
 106 void AUD_set_active_out (SWVoiceOut *sw, int on);
 107 int  AUD_is_active_out (SWVoiceOut *sw);
 108
 109 void     AUD_init_time_stamp_out (SWVoiceOut *sw, QEMUAudioTimeStamp *ts);
 110 uint64_t AUD_get_elapsed_usec_out (SWVoiceOut *sw, QEMUAudioTimeStamp *ts);
 111
 112 void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol);
 113 void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol);
 114
 115 SWVoiceIn *AUD_open_in (
 116     QEMUSoundCard *card,
 117     SWVoiceIn *sw,
 118     const char *name,
 119     void *callback_opaque,
 120     audio_callback_fn callback_fn,
 121     struct audsettings *settings
 122     );
 123
 124 void AUD_close_in (QEMUSoundCard *card, SWVoiceIn *sw);
 125 int  AUD_read (SWVoiceIn *sw, void *pcm_buf, int size);
 126 void AUD_set_active_in (SWVoiceIn *sw, int on);
 127 int  AUD_is_active_in (SWVoiceIn *sw);
 128
 129 void     AUD_init_time_stamp_in (SWVoiceIn *sw, QEMUAudioTimeStamp *ts);
 130 uint64_t AUD_get_elapsed_usec_in (SWVoiceIn *sw, QEMUAudioTimeStamp *ts);
 131
 132 static inline void *advance (void *p, int incr)
 133 {
 134     uint8_t *d = p;
 135     return (d + incr);
 136 }
 137
 138 #ifdef __GNUC__
 139 #define audio_MIN(a, b) ( __extension__ ({      \
 140     __typeof (a) ta = a;                        \
 141     __typeof (b) tb = b;                        \
 142     ((ta)>(tb)?(tb):(ta));                      \
 143 }))
 144
 145 #define audio_MAX(a, b) ( __extension__ ({      \
 146     __typeof (a) ta = a;                        \
 147     __typeof (b) tb = b;                        \
 148     ((ta)<(tb)?(tb):(ta));                      \
 149 }))
 150 #else
 151 #define audio_MIN(a, b) ((a)>(b)?(b):(a))
 152 #define audio_MAX(a, b) ((a)<(b)?(b):(a))
 153 #endif
 154
 155 int wav_start_capture (CaptureState *s, const char *path, int freq,
 156                        int bits, int nchannels);
 157
 158 bool audio_is_cleaning_up(void);
 159 void audio_cleanup(void);
 160
 161 void audio_sample_to_uint64(void *samples, int pos,
 162                             uint64_t *left, uint64_t *right);
 163 void audio_sample_from_uint64(void *samples, int pos,
 164                             uint64_t left, uint64_t right);
 165
 166 #endif /* QEMU_AUDIO_H */