From: Marc-André Lureau <marcandre.lureau@redhat.com>

AUD_init_time_stamp_{in,out} and AUD_get_elapsed_usec_{in,out} are only
used by the adlib device. The result isn't actually being used since
ADLIB_KILL_TIMERS was set some 20y ago. Let's drop this dead code now.

Drop QEMUAudioTimeStamp as well as reported by Akihiko Odaki.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---
 audio/audio_template.h                        | 34 -------------------
 include/qemu/audio.h                          | 10 ------
 hw/audio/adlib.c                              | 18 +---------
 .../codeconverter/test_regexps.py             |  1 -
 4 files changed, 1 insertion(+), 62 deletions(-)

diff --git a/audio/audio_template.h b/audio/audio_template.h
index 7a8c431f2d7..1ab3c47fd76 100644
--- a/audio/audio_template.h
+++ b/audio/audio_template.h
@@ -569,40 +569,6 @@ bool glue(AUD_is_active_, TYPE)(SW *sw)
     return sw ? sw->active : 0;
 }
 
-void glue (AUD_init_time_stamp_, TYPE) (SW *sw, QEMUAudioTimeStamp *ts)
-{
-    if (!sw) {
-        return;
-    }
-
-    ts->old_ts = sw->hw->ts_helper;
-}
-
-uint64_t glue (AUD_get_elapsed_usec_, TYPE) (SW *sw, QEMUAudioTimeStamp *ts)
-{
-    uint64_t delta, cur_ts, old_ts;
-
-    if (!sw) {
-        return 0;
-    }
-
-    cur_ts = sw->hw->ts_helper;
-    old_ts = ts->old_ts;
-    /* dolog ("cur %" PRId64 " old %" PRId64 "\n", cur_ts, old_ts); */
-
-    if (cur_ts >= old_ts) {
-        delta = cur_ts - old_ts;
-    } else {
-        delta = UINT64_MAX - old_ts + cur_ts;
-    }
-
-    if (!delta) {
-        return 0;
-    }
-
-    return muldiv64 (delta, sw->hw->info.freq, 1000000);
-}
-
 #undef TYPE
 #undef HW
 #undef SW
diff --git a/include/qemu/audio.h b/include/qemu/audio.h
index a92e0b70ef0..a1a64ad340d 100644
--- a/include/qemu/audio.h
+++ b/include/qemu/audio.h
@@ -50,10 +50,6 @@ struct AudioBackendClass {
 
 typedef struct AudioBackend AudioBackend;
 
-typedef struct QEMUAudioTimeStamp {
-    uint64_t old_ts;
-} QEMUAudioTimeStamp;
-
 bool AUD_backend_check(AudioBackend **be, Error **errp);
 
 SWVoiceOut *AUD_open_out (
@@ -71,9 +67,6 @@ int  AUD_get_buffer_size_out (SWVoiceOut *sw);
 void AUD_set_active_out(SWVoiceOut *sw, bool on);
 bool AUD_is_active_out(SWVoiceOut *sw);
 
-void     AUD_init_time_stamp_out (SWVoiceOut *sw, QEMUAudioTimeStamp *ts);
-uint64_t AUD_get_elapsed_usec_out (SWVoiceOut *sw, QEMUAudioTimeStamp *ts);
-
 #define AUDIO_MAX_CHANNELS 16
 typedef struct Volume {
     bool mute;
@@ -112,9 +105,6 @@ size_t AUD_read (SWVoiceIn *sw, void *pcm_buf, size_t size);
 void AUD_set_active_in(SWVoiceIn *sw, bool on);
 bool AUD_is_active_in(SWVoiceIn *sw);
 
-void     AUD_init_time_stamp_in (SWVoiceIn *sw, QEMUAudioTimeStamp *ts);
-uint64_t AUD_get_elapsed_usec_in (SWVoiceIn *sw, QEMUAudioTimeStamp *ts);
-
 void audio_cleanup(void);
 
 typedef struct st_sample st_sample;
diff --git a/hw/audio/adlib.c b/hw/audio/adlib.c
index 8b9fe53e17b..efab5107a4c 100644
--- a/hw/audio/adlib.c
+++ b/hw/audio/adlib.c
@@ -34,8 +34,6 @@
 
 #define DEBUG 0
 
-#define ADLIB_KILL_TIMERS 1
-
 #define ADLIB_DESC "Yamaha YM3812 (OPL2)"
 
 #if DEBUG
@@ -71,7 +69,6 @@ struct AdlibState {
     uint64_t dexp[2];
     SWVoiceOut *voice;
     int left, pos, samples;
-    QEMUAudioTimeStamp ats;
     FM_OPL *opl;
     PortioList port_list;
 };
@@ -88,19 +85,7 @@ static void adlib_kill_timers (AdlibState *s)
 
     for (i = 0; i < 2; ++i) {
         if (s->ticking[i]) {
-            uint64_t delta;
-
-            delta = AUD_get_elapsed_usec_out (s->voice, &s->ats);
-            ldebug (
-                "delta = %f dexp = %f expired => %d",
-                delta / 1000000.0,
-                s->dexp[i] / 1000000.0,
-                delta >= s->dexp[i]
-                );
-            if (ADLIB_KILL_TIMERS || delta >= s->dexp[i]) {
-                adlib_stop_opl_timer (s, i);
-                AUD_init_time_stamp_out (s->voice, &s->ats);
-            }
+            adlib_stop_opl_timer(s, i);
         }
     }
 }
@@ -149,7 +134,6 @@ static void timer_handler (void *opaque, int c, double interval_Sec)
 #endif
 
     s->dexp[n] = interval_Sec * 1000000.0;
-    AUD_init_time_stamp_out (s->voice, &s->ats);
 }
 
 static int write_audio (AdlibState *s, int samples)
diff --git a/scripts/codeconverter/codeconverter/test_regexps.py b/scripts/codeconverter/codeconverter/test_regexps.py
index b00e9ef15b2..1ab3fa1699f 100644
--- a/scripts/codeconverter/codeconverter/test_regexps.py
+++ b/scripts/codeconverter/codeconverter/test_regexps.py
@@ -202,7 +202,6 @@ def test_struct_re():
     uint64_t dexp[2];
     SWVoiceOut *voice;
     int left, pos, samples;
-    QEMUAudioTimeStamp ats;
     FM_OPL *opl;
     PortioList port_list;
 } AdlibState;
-- 
2.52.0