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 "sys-queue.h"
  28
  29 typedef void (*audio_callback_fn_t) (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 } audfmt_e;
  37
  38 typedef struct {
  39     int freq;
  40     int nchannels;
  41     audfmt_e fmt;
  42 } audsettings_t;
  43
  44 typedef struct AudioState AudioState;
  45 typedef struct SWVoiceOut SWVoiceOut;
  46 typedef struct SWVoiceIn SWVoiceIn;
  47
  48 typedef struct QEMUSoundCard {
  49     AudioState *audio;
  50     char *name;
  51     LIST_ENTRY (QEMUSoundCard) entries;
  52 } QEMUSoundCard;
  53
  54 typedef struct QEMUAudioTimeStamp {
  55     uint64_t old_ts;
  56 } QEMUAudioTimeStamp;
  57
  58 void AUD_vlog (const char *cap, const char *fmt, va_list ap);
  59 void AUD_log (const char *cap, const char *fmt, ...)
  60 #ifdef __GNUC__
  61     __attribute__ ((__format__ (__printf__, 2, 3)))
  62 #endif
  63     ;
  64
  65 AudioState *AUD_init (void);
  66 void AUD_help (void);
  67 void AUD_register_card (AudioState *s, const char *name, QEMUSoundCard *card);
  68 void AUD_remove_card (QEMUSoundCard *card);
  69
  70 SWVoiceOut *AUD_open_out (
  71     QEMUSoundCard *card,
  72     SWVoiceOut *sw,
  73     const char *name,
  74     void *callback_opaque,
  75     audio_callback_fn_t callback_fn,
  76     audsettings_t *settings,
  77     int sw_endian
  78     );
  79
  80 void AUD_close_out (QEMUSoundCard *card, SWVoiceOut *sw);
  81 int  AUD_write (SWVoiceOut *sw, void *pcm_buf, int size);
  82 int  AUD_get_buffer_size_out (SWVoiceOut *sw);
  83 void AUD_set_active_out (SWVoiceOut *sw, int on);
  84 int  AUD_is_active_out (SWVoiceOut *sw);
  85
  86 void     AUD_init_time_stamp_out (SWVoiceOut *sw, QEMUAudioTimeStamp *ts);
  87 uint64_t AUD_get_elapsed_usec_out (SWVoiceOut *sw, QEMUAudioTimeStamp *ts);
  88
  89 SWVoiceIn *AUD_open_in (
  90     QEMUSoundCard *card,
  91     SWVoiceIn *sw,
  92     const char *name,
  93     void *callback_opaque,
  94     audio_callback_fn_t callback_fn,
  95     audsettings_t *settings,
  96     int sw_endian
  97     );
  98
  99 void AUD_close_in (QEMUSoundCard *card, SWVoiceIn *sw);
 100 int  AUD_read (SWVoiceIn *sw, void *pcm_buf, int size);
 101 void AUD_set_active_in (SWVoiceIn *sw, int on);
 102 int  AUD_is_active_in (SWVoiceIn *sw);
 103
 104 void     AUD_init_time_stamp_in (SWVoiceIn *sw, QEMUAudioTimeStamp *ts);
 105 uint64_t AUD_get_elapsed_usec_in (SWVoiceIn *sw, QEMUAudioTimeStamp *ts);
 106
 107 static inline void *advance (void *p, int incr)
 108 {
 109     uint8_t *d = p;
 110     return (d + incr);
 111 }
 112
 113 uint32_t popcount (uint32_t u);
 114 inline uint32_t lsbindex (uint32_t u);
 115
 116 #ifdef __GNUC__
 117 #define audio_MIN(a, b) ( __extension__ ({      \
 118     __typeof (a) ta = a;                        \
 119     __typeof (b) tb = b;                        \
 120     ((ta)>(tb)?(tb):(ta));                      \
 121 }))
 122
 123 #define audio_MAX(a, b) ( __extension__ ({      \
 124     __typeof (a) ta = a;                        \
 125     __typeof (b) tb = b;                        \
 126     ((ta)<(tb)?(tb):(ta));                      \
 127 }))
 128 #else
 129 #define audio_MIN(a, b) ((a)>(b)?(b):(a))
 130 #define audio_MAX(a, b) ((a)<(b)?(b):(a))
 131 #endif
 132
 133 #endif  /* audio.h */