On 02.10.2017 12:20, Tanu Kaskinen wrote:
On Sat, 2017-08-19 at 17:48 +0200, Georg Chini wrote:
This patch extends the client subscription API, so that signals sent from
PulseAudio can be processed. Within PulseAudio, a signal can be emitted
using pa_signal_post(). The interface can be used to notify the client of
events that are not covered by the subscription API (for example a button
press event on a bluetooth headset).
Setting up signal notification is very similar to using subscriptions.
First the client needs to subscribe with pa_context_subscribe_signals()
and then sets up a signal handler using pa_context_set_signal_callback().
The signal handler will receive three arguments in addition to the usual
context and userdata:
sender - string that specifies the origin of the signal
signal - string that specifies the type of the signal
signal_parameters - optional string for additional information
---
PROTOCOL | 3 ++
src/map-file | 2 ++
src/pulse/def.h | 4 +++
src/pulse/internal.h | 2 ++
src/pulse/subscribe.c | 66 +++++++++++++++++++++++++++++++++++++----
src/pulse/subscribe.h | 9 ++++++
src/pulsecore/core-messages.c | 23 ++++++++++++++
src/pulsecore/core-messages.h | 11 +++++++
src/pulsecore/core.h | 1 +
src/pulsecore/native-common.h | 1 +
src/pulsecore/pdispatch.c | 1 +
src/pulsecore/protocol-native.c | 57 +++++++++++++++++++++++++++++++++++
12 files changed, 174 insertions(+), 6 deletions(-)
diff --git a/PROTOCOL b/PROTOCOL
index ccd3cd2c..e9337e27 100644
--- a/PROTOCOL
+++ b/PROTOCOL
@@ -427,6 +427,9 @@ Added new command for communication with objects.
PA_COMMAND_SEND_OBJECT_MESSAGE:
sends a message to an object that registered a named message handler
+Added signal subscription functions. Clients can now subscribe to signals
+that PulseAudio sends.
The PROTOCOL file is supposed to document the protocol changes in
detail (or at least that's my impression), but this description is a
very high-level note. Also, talking about "functions" is off-topic
since the protocol doesn't define any functions.
Where does your impression come from? My impression was, that the
PROTOCOL file has only very brief and high level descriptions, so I kept
it that way. I can surely add more details, if you want.
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