LXR qemu/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
  30typedef void (*audio_callback_fn) (void *opaque, int avail);
  31
  32typedef 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
  47struct audsettings {
  48    int freq;
  49    int nchannels;
  50    audfmt_e fmt;
  51    int endianness;
  52};
  53
  54typedef enum {
  55    AUD_CNOTIFY_ENABLE,
  56    AUD_CNOTIFY_DISABLE
  57} audcnotification_e;
  58
  59struct 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
  65struct capture_ops {
  66    void (*info) (void *opaque);
  67    void (*destroy) (void *opaque);
  68};
  69
  70typedef struct CaptureState {
  71    void *opaque;
  72    struct capture_ops ops;
  73    QLIST_ENTRY (CaptureState) entries;
  74} CaptureState;
  75
  76typedef struct SWVoiceOut SWVoiceOut;
  77typedef struct CaptureVoiceOut CaptureVoiceOut;
  78typedef struct SWVoiceIn SWVoiceIn;
  79
  80typedef struct QEMUSoundCard {
  81    char *name;
  82    QLIST_ENTRY (QEMUSoundCard) entries;
  83} QEMUSoundCard;
  84
  85typedef struct QEMUAudioTimeStamp {
  86    uint64_t old_ts;
  87} QEMUAudioTimeStamp;
  88
  89void AUD_vlog (const char *cap, const char *fmt, va_list ap) GCC_FMT_ATTR(2, 0);
  90void AUD_log (const char *cap, const char *fmt, ...) GCC_FMT_ATTR(2, 3);
  91
  92void AUD_help (void);
  93void AUD_register_card (const char *name, QEMUSoundCard *card);
  94void AUD_remove_card (QEMUSoundCard *card);
  95CaptureVoiceOut *AUD_add_capture (
  96    struct audsettings *as,
  97    struct audio_capture_ops *ops,
  98    void *opaque
  99    );
 100void AUD_del_capture (CaptureVoiceOut *cap, void *cb_opaque);
 101
 102SWVoiceOut *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
 111void AUD_close_out (QEMUSoundCard *card, SWVoiceOut *sw);
 112int  AUD_write (SWVoiceOut *sw, void *pcm_buf, int size);
 113int  AUD_get_buffer_size_out (SWVoiceOut *sw);
 114void AUD_set_active_out (SWVoiceOut *sw, int on);
 115int  AUD_is_active_out (SWVoiceOut *sw);
 116
 117void     AUD_init_time_stamp_out (SWVoiceOut *sw, QEMUAudioTimeStamp *ts);
 118uint64_t AUD_get_elapsed_usec_out (SWVoiceOut *sw, QEMUAudioTimeStamp *ts);
 119
 120void AUD_set_volume_out (SWVoiceOut *sw, int mute, uint8_t lvol, uint8_t rvol);
 121void AUD_set_volume_in (SWVoiceIn *sw, int mute, uint8_t lvol, uint8_t rvol);
 122
 123SWVoiceIn *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
 132void AUD_close_in (QEMUSoundCard *card, SWVoiceIn *sw);
 133int  AUD_read (SWVoiceIn *sw, void *pcm_buf, int size);
 134void AUD_set_active_in (SWVoiceIn *sw, int on);
 135int  AUD_is_active_in (SWVoiceIn *sw);
 136
 137void     AUD_init_time_stamp_in (SWVoiceIn *sw, QEMUAudioTimeStamp *ts);
 138uint64_t AUD_get_elapsed_usec_in (SWVoiceIn *sw, QEMUAudioTimeStamp *ts);
 139
 140static 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
 163int wav_start_capture (CaptureState *s, const char *path, int freq,
 164                       int bits, int nchannels);
 165
 166bool audio_is_cleaning_up(void);
 167void audio_cleanup(void);
 168
 169void audio_sample_to_uint64(void *samples, int pos,
 170                            uint64_t *left, uint64_t *right);
 171void audio_sample_from_uint64(void *samples, int pos,
 172                            uint64_t left, uint64_t right);
 173
 174#endif /* QEMU_AUDIO_H */
 175