pipewire: add and enable native gstreamer audio source & sink elements for pipewire

[AGL/meta-agl-devel.git] / meta-pipewire / recipes-multimedia / pipewire / pipewire / 0012-gst-pwaudioringbuffer-request-pause-play-on-the-appr.patch

diff --git a/meta-pipewire/recipes-multimedia/pipewire/pipewire/0012-gst-pwaudioringbuffer-request-pause-play-on-the-appr.patch b/meta-pipewire/recipes-multimedia/pipewire/pipewire/0012-gst-pwaudioringbuffer-request-pause-play-on-the-appr.patch
new file mode 100644 (file)
index 0000000..3680cc3
--- /dev/null
+++ b/meta-pipewire/recipes-multimedia/pipewire/pipewire/0012-gst-pwaudioringbuffer-request-pause-play-on-the-appr.patch
@@ -0,0 +1,76 @@
+From 1eb1e3a839f97ad4aa43c289f702c587a068a333 Mon Sep 17 00:00:00 2001
+From: George Kiagiadakis <george.kiagiadakis@collabora.com>
+Date: Thu, 11 Jul 2019 16:21:17 +0300
+Subject: [PATCH] gst/pwaudioringbuffer: request pause/play on the appropriate
+ stream state changes
+
+This allows the client to properly go to PAUSED when the session manager
+unlinks the stream and go again to PLAYING when the sm re-links it.
+This allows the session manager to implement policies without letting
+the client pipeline freeze (in the absence of a running audio clock)
+when it is unlinked. Note that in case the client doesn't handle the
+request, there is still no issue. Like in pulseaudio, the clock just
+freezes, so the pipeline stops progressing.
+
+This is similar to the pulseaudio cork/uncork mechanism.
+
+Upstream-Status: Submitted [https://github.com/PipeWire/pipewire/pull/140]
+---
+ src/gst/gstpwaudioringbuffer.c | 27 +++++++++++++++++++++++----
+ 1 file changed, 23 insertions(+), 4 deletions(-)
+
+diff --git a/src/gst/gstpwaudioringbuffer.c b/src/gst/gstpwaudioringbuffer.c
+index 181304e8..04259927 100644
+--- a/src/gst/gstpwaudioringbuffer.c
++++ b/src/gst/gstpwaudioringbuffer.c
+@@ -202,11 +202,16 @@ on_stream_state_changed (void *data, enum pw_stream_state old,
+     enum pw_stream_state state, const char *error)
+ {
+   GstPwAudioRingBuffer *self = GST_PW_AUDIO_RING_BUFFER (data);
++  GstMessage *msg;
+ 
+   GST_DEBUG_OBJECT (self->elem, "got stream state: %s",
+       pw_stream_state_as_string (state));
+ 
+   switch (state) {
++    case PW_STREAM_STATE_ERROR:
++      GST_ELEMENT_ERROR (self->elem, RESOURCE, FAILED,
++          ("stream error: %s", error), (NULL));
++      break;
+     case PW_STREAM_STATE_UNCONNECTED:
+       GST_ELEMENT_ERROR (self->elem, RESOURCE, FAILED,
+           ("stream disconnected unexpectedly"), (NULL));
+@@ -214,12 +219,26 @@ on_stream_state_changed (void *data, enum pw_stream_state old,
+     case PW_STREAM_STATE_CONNECTING:
+     case PW_STREAM_STATE_CONFIGURE:
+     case PW_STREAM_STATE_READY:
++      break;
+     case PW_STREAM_STATE_PAUSED:
+-    case PW_STREAM_STATE_STREAMING:
++      if (old == PW_STREAM_STATE_STREAMING) {
++        if (GST_STATE (self->elem) != GST_STATE_PAUSED &&
++            GST_STATE_TARGET (self->elem) != GST_STATE_PAUSED) {
++          GST_DEBUG_OBJECT (self->elem, "requesting GST_STATE_PAUSED");
++          msg = gst_message_new_request_state (GST_OBJECT (self->elem),
++              GST_STATE_PAUSED);
++          gst_element_post_message (self->elem, msg);
++        }
++      }
+       break;
+-    case PW_STREAM_STATE_ERROR:
+-      GST_ELEMENT_ERROR (self->elem, RESOURCE, FAILED,
+-          ("stream error: %s", error), (NULL));
++    case PW_STREAM_STATE_STREAMING:
++      if (GST_STATE (self->elem) != GST_STATE_PLAYING &&
++          GST_STATE_TARGET (self->elem) != GST_STATE_PLAYING) {
++        GST_DEBUG_OBJECT (self->elem, "requesting GST_STATE_PLAYING");
++        msg = gst_message_new_request_state (GST_OBJECT (self->elem),
++            GST_STATE_PLAYING);
++        gst_element_post_message (self->elem, msg);
++      }
+       break;
+   }
+   pw_thread_loop_signal (self->main_loop, FALSE);
+-- 
+2.20.1
+