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[Qemu-devel] [PATCH] audio: disable timer when idle.
From: |
Gerd Hoffmann |
Subject: |
[Qemu-devel] [PATCH] audio: disable timer when idle. |
Date: |
Mon, 15 Nov 2010 13:24:24 +0100 |
This patch makes sure the audio timer gets disabled when no voice is
active. It adds a variable to track whenever the timer is needed or
not to the global audio state. audio_timer_reset() will set that
variable. audio_timer() will check that variable and only re-arm
the timer when needed. One additional call to audio_timer_reset() has
been added to the output voice disable code path.
Signed-off-by: Gerd Hoffmann <address@hidden>
---
audio/audio.c | 6 +++++-
audio/audio_int.h | 1 +
2 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/audio/audio.c b/audio/audio.c
index ade342e..9cf91ae 100644
--- a/audio/audio.c
+++ b/audio/audio.c
@@ -1101,7 +1101,8 @@ static void audio_timer (void *opaque)
AudioState *s = opaque;
audio_run ("timer");
- qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + conf.period.ticks);
+ if (s->need_timer)
+ qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + conf.period.ticks);
}
@@ -1124,9 +1125,11 @@ static void audio_reset_timer (void)
AudioState *s = &glob_audio_state;
if (audio_is_timer_needed ()) {
+ s->need_timer = 1;
qemu_mod_timer (s->ts, qemu_get_clock (vm_clock) + 1);
}
else {
+ s->need_timer = 0;
qemu_del_timer (s->ts);
}
}
@@ -1380,6 +1383,7 @@ static void audio_run_out (AudioState *s)
sc->sw.active = 0;
audio_recalc_and_notify_capture (sc->cap);
}
+ audio_reset_timer ();
continue;
}
diff --git a/audio/audio_int.h b/audio/audio_int.h
index d66f2c3..df060a9 100644
--- a/audio/audio_int.h
+++ b/audio/audio_int.h
@@ -190,6 +190,7 @@ struct AudioState {
void *drv_opaque;
QEMUTimer *ts;
+ int need_timer;
QLIST_HEAD (card_listhead, QEMUSoundCard) card_head;
QLIST_HEAD (hw_in_listhead, HWVoiceIn) hw_head_in;
QLIST_HEAD (hw_out_listhead, HWVoiceOut) hw_head_out;
--
1.7.1
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