audio: reduce glob_audio_state usage

Remove glob_audio_state from functions, where possible without breaking
the API.  This means that most static functions in audio.c now take an
AudioState pointer instead of implicitly using glob_audio_state.  Also
included a pointer in SWVoice*, HWVoice* structs, so that functions
dealing them can know the audio state without having to pass it around
separately.

This is required in order to support multiple simultaneous audio
backends (added in a later commit).

Signed-off-by: Kővágó, Zoltán <DirtY.iCE.hu@gmail.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-id: b5e241f24e795267b145bcde7c6a72dd5e6037ea.1566168923.git.DirtY.iCE.hu@gmail.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/audio/audio_int.h b/audio/audio_int.h
index 3f14842709..8164696b2c 100644
--- a/audio/audio_int.h
+++ b/audio/audio_int.h
@@ -49,9 +49,11 @@ struct audio_pcm_info {
     int swap_endianness;
 };
 
+typedef struct AudioState AudioState;
 typedef struct SWVoiceCap SWVoiceCap;
 
 typedef struct HWVoiceOut {
+    AudioState *s;
     int enabled;
     int poll_mode;
     int pending_disable;
@@ -73,6 +75,7 @@ typedef struct HWVoiceOut {
 } HWVoiceOut;
 
 typedef struct HWVoiceIn {
+    AudioState *s;
     int enabled;
     int poll_mode;
     struct audio_pcm_info info;
@@ -94,6 +97,7 @@ typedef struct HWVoiceIn {
 
 struct SWVoiceOut {
     QEMUSoundCard *card;
+    AudioState *s;
     struct audio_pcm_info info;
     t_sample *conv;
     int64_t ratio;
@@ -111,6 +115,7 @@ struct SWVoiceOut {
 
 struct SWVoiceIn {
     QEMUSoundCard *card;
+    AudioState *s;
     int active;
     struct audio_pcm_info info;
     int64_t ratio;
@@ -188,6 +193,9 @@ typedef struct AudioState {
     int nb_hw_voices_in;
     int vm_running;
     int64_t period_ticks;
+
+    bool timer_running;
+    uint64_t timer_last;
 } AudioState;
 
 extern const struct mixeng_volume nominal_volume;