From b5373079f20aeeba8ac80e773f3cc05692dbb51f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= <thomas@t-8ch.de>
Date: Tue, 29 Nov 2022 01:45:12 +0100
Subject: [PATCH] ao_pipewire: deactivate stream at end of playback

By explictly shutting down the stream pipewire can deactivate the used
hardware, saving CPU and power.

Fixes #9835
---
 audio/out/ao_pipewire.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/audio/out/ao_pipewire.c b/audio/out/ao_pipewire.c
index 4880e776f0..267d649848 100644
--- a/audio/out/ao_pipewire.c
+++ b/audio/out/ao_pipewire.c
@@ -185,6 +185,11 @@ static void on_process(void *userdata)
     pw_stream_queue_buffer(p->stream, b);
 
     MP_TRACE(ao, "queued %d of %d samples\n", samples, nframes);
+
+    if (samples == 0 && !ao_is_playing(ao)) {
+        MP_DBG(ao, "end of playback\n");
+        pw_stream_flush(p->stream, true);
+    }
 }
 
 static void on_param_changed(void *userdata, uint32_t id, const struct spa_pod *param)
@@ -274,12 +279,21 @@ static void on_control_info(void *userdata, uint32_t id,
     }
 }
 
+static void on_drained(void *userdata) {
+    struct ao *ao = userdata;
+    struct priv *p = ao->priv;
+
+    MP_DBG(ao, "stream drained\n");
+    pw_stream_set_active(p->stream, false);
+}
+
 static const struct pw_stream_events stream_events = {
     .version = PW_VERSION_STREAM_EVENTS,
     .param_changed = on_param_changed,
     .process = on_process,
     .state_changed = on_state_changed,
     .control_info = on_control_info,
+    .drained = on_drained,
 };
 
 static void uninit(struct ao *ao)