audio fixes + initial audio capture support (malc)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2040 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 18 insertions, 16 deletions

diff --git a/audio/noaudio.c b/audio/noaudio.c
index aa3581168d..314f6177ad 100644
--- a/audio/noaudio.c
+++ b/audio/noaudio.c
@@ -40,22 +40,21 @@ static int no_run_out (HWVoiceOut *hw)
 {
     NoVoiceOut *no = (NoVoiceOut *) hw;
     int live, decr, samples;
-    int64_t now = qemu_get_clock (vm_clock);
-    int64_t ticks = now - no->old_ticks;
-    int64_t bytes = (ticks * hw->info.bytes_per_second) / ticks_per_sec;
-
-    if (bytes > INT_MAX) {
-        samples = INT_MAX >> hw->info.shift;
-    }
-    else {
-        samples = bytes >> hw->info.shift;
-    }
+    int64_t now;
+    int64_t ticks;
+    int64_t bytes;
 
     live = audio_pcm_hw_get_live_out (&no->hw);
     if (!live) {
         return 0;
     }
 
+    now = qemu_get_clock (vm_clock);
+    ticks = now - no->old_ticks;
+    bytes = (ticks * hw->info.bytes_per_second) / ticks_per_sec;
+    bytes = audio_MIN (bytes, INT_MAX);
+    samples = bytes >> hw->info.shift;
+
     no->old_ticks = now;
     decr = audio_MIN (live, samples);
     hw->rpos = (hw->rpos + decr) % hw->samples;
@@ -101,17 +100,20 @@ static void no_fini_in (HWVoiceIn *hw)
 static int no_run_in (HWVoiceIn *hw)
 {
     NoVoiceIn *no = (NoVoiceIn *) hw;
-    int64_t now = qemu_get_clock (vm_clock);
-    int64_t ticks = now - no->old_ticks;
-    int64_t bytes = (ticks * hw->info.bytes_per_second) / ticks_per_sec;
     int live = audio_pcm_hw_get_live_in (hw);
     int dead = hw->samples - live;
     int samples;
 
-    bytes = audio_MIN (bytes, INT_MAX);
-    samples = bytes >> hw->info.shift;
-    samples = audio_MIN (samples, dead);
+    if (dead) {
+        int64_t now = qemu_get_clock (vm_clock);
+        int64_t ticks = now - no->old_ticks;
+        int64_t bytes = (ticks * hw->info.bytes_per_second) / ticks_per_sec;
 
+        no->old_ticks = now;
+        bytes = audio_MIN (bytes, INT_MAX);
+        samples = bytes >> hw->info.shift;
+        samples = audio_MIN (samples, dead);
+    }
     return samples;
 }