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audio: add driver registry

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Add registry for audio drivers, using the existing audio_driver struct.
Make all drivers register themself.  The old list of audio_driver struct
pointers is now a list of audio driver names, specifying the priority
(aka probe order) in case no driver is explicitly asked for.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 20180306074053.22856-2-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann 2018-03-06 08:40:47 +01:00
parent a88afc649e
commit d3893a39eb
12 changed files with 106 additions and 45 deletions
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14
audio/audio_int.h
View file

@ -141,6 +141,7 @@ struct SWVoiceIn {
QLIST_ENTRY (SWVoiceIn) entries;
};
typedef struct audio_driver audio_driver;
struct audio_driver {
const char *name;
const char *descr;
@ -154,6 +155,7 @@ struct audio_driver {
int voice_size_out;
int voice_size_in;
int ctl_caps;
QLIST_ENTRY(audio_driver) next;
};
struct audio_pcm_ops {
@ -203,17 +205,11 @@ struct AudioState {
int vm_running;
};
extern struct audio_driver no_audio_driver;
extern struct audio_driver oss_audio_driver;
extern struct audio_driver sdl_audio_driver;
extern struct audio_driver wav_audio_driver;
extern struct audio_driver alsa_audio_driver;
extern struct audio_driver coreaudio_audio_driver;
extern struct audio_driver dsound_audio_driver;
extern struct audio_driver pa_audio_driver;
extern struct audio_driver spice_audio_driver;
extern const struct mixeng_volume nominal_volume;
void audio_driver_register(audio_driver *drv);
audio_driver *audio_driver_lookup(const char *name);
void audio_pcm_init_info (struct audio_pcm_info *info, struct audsettings *as);
void audio_pcm_info_clear_buf (struct audio_pcm_info *info, void *buf, int len);