[Qemu-devel] [PATCH v2 32/52] noaudio: port to the new audio backend api

[Kővágó, Zoltán]

Signed-off-by: Kővágó, Zoltán <address@hidden>
---
 audio/noaudio.c | 39 +++++++++++++++------------------------
 1 file changed, 15 insertions(+), 24 deletions(-)

diff --git a/audio/noaudio.c b/audio/noaudio.c
index c49f2df4b3..6a3a1c418b 100644
--- a/audio/noaudio.c
+++ b/audio/noaudio.c
@@ -40,10 +40,9 @@ typedef struct NoVoiceIn {
     int64_t old_ticks;
 } NoVoiceIn;
 
-static int no_run_out (HWVoiceOut *hw, int live)
+static size_t no_write(HWVoiceOut *hw, void *buf, size_t len)
 {
     NoVoiceOut *no = (NoVoiceOut *) hw;
-    int decr, samples;
     int64_t now;
     int64_t ticks;
     int64_t bytes;
@@ -51,13 +50,9 @@ static int no_run_out (HWVoiceOut *hw, int live)
     now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
     ticks = now - no->old_ticks;
     bytes = muldiv64(ticks, hw->info.bytes_per_second, NANOSECONDS_PER_SECOND);
-    bytes = MIN(bytes, INT_MAX);
-    samples = bytes >> hw->info.shift;
 
     no->old_ticks = now;
-    decr = MIN (live, samples);
-    hw->rpos = (hw->rpos + decr) % hw->samples;
-    return decr;
+    return MIN(len, bytes);
 }
 
 static int no_init_out(HWVoiceOut *hw, struct audsettings *as, void 
*drv_opaque)
@@ -91,25 +86,21 @@ static void no_fini_in (HWVoiceIn *hw)
     (void) hw;
 }
 
-static int no_run_in (HWVoiceIn *hw)
+static size_t no_read(HWVoiceIn *hw, void *buf, size_t size)
 {
+    size_t to_clear;
     NoVoiceIn *no = (NoVoiceIn *) hw;
-    int live = audio_pcm_hw_get_live_in (hw);
-    int dead = hw->samples - live;
-    int samples = 0;
 
-    if (dead) {
-        int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
-        int64_t ticks = now - no->old_ticks;
-        int64_t bytes =
-            muldiv64(ticks, hw->info.bytes_per_second, NANOSECONDS_PER_SECOND);
+    int64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
+    int64_t ticks = now - no->old_ticks;
+    int64_t bytes =
+        muldiv64 (ticks, hw->info.bytes_per_second, NANOSECONDS_PER_SECOND);
 
-        no->old_ticks = now;
-        bytes = MIN (bytes, INT_MAX);
-        samples = bytes >> hw->info.shift;
-        samples = MIN (samples, dead);
-    }
-    return samples;
+    no->old_ticks = now;
+    to_clear = MIN(bytes, size);
+
+    audio_pcm_info_clear_buf(&hw->info, buf, to_clear >> hw->info.shift);
+    return to_clear;
 }
 
 static int no_ctl_in (HWVoiceIn *hw, int cmd, ...)
@@ -132,12 +123,12 @@ static void no_audio_fini (void *opaque)
 static struct audio_pcm_ops no_pcm_ops = {
     .init_out = no_init_out,
     .fini_out = no_fini_out,
-    .run_out  = no_run_out,
+    .write    = no_write,
     .ctl_out  = no_ctl_out,
 
     .init_in  = no_init_in,
     .fini_in  = no_fini_in,
-    .run_in   = no_run_in,
+    .read     = no_read,
     .ctl_in   = no_ctl_in
 };
 
-- 
2.20.1