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examples: use PW_KEY_TARGET_OBJECT

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In examples, tell people how to use target.object.
This commit is contained in:
Pauli Virtanen 2022-01-16 19:48:43 +02:00
parent de65fd442f
commit ca87d40448
16 changed files with 94 additions and 65 deletions
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24
doc/tutorial5.dox
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@ -23,18 +23,25 @@ We create a stream object with different properties to make it a Camera
Video Capture stream.
\code{.c}
props = pw_properties_new(PW_KEY_MEDIA_TYPE, "Video",
PW_KEY_MEDIA_CATEGORY, "Capture",
PW_KEY_MEDIA_ROLE, "Camera",
NULL);
if (argc > 1)
pw_properties_set(props, PW_KEY_TARGET_OBJECT, argv[1]);
data.stream = pw_stream_new_simple(
pw_main_loop_get_loop(data.loop),
"video-capture",
pw_properties_new(
PW_KEY_MEDIA_TYPE, "Video",
PW_KEY_MEDIA_CATEGORY, "Capture",
PW_KEY_MEDIA_ROLE, "Camera",
NULL),
props,
&stream_events,
&data);
\endcode
We also optionally allow the user to pass the name of the target node where the session
manager is supposed to connect the node. The user may also give the value of the
unique target node serial (`PW_KEY_OBJECT_SERIAL`) as the value.
In addition to the `process` event, we are also going to listen to a new event,
`param_changed`:
@ -122,7 +129,7 @@ Now we're ready to connect the stream and run the main loop:
\code{.c}
pw_stream_connect(data.stream,
PW_DIRECTION_INPUT,
argc > 1 ? (uint32_t)atoi(argv[1]) : PW_ID_ANY,
PW_ID_ANY,
PW_STREAM_FLAG_AUTOCONNECT |
PW_STREAM_FLAG_MAP_BUFFERS,
params, 1);
@ -130,9 +137,8 @@ Now we're ready to connect the stream and run the main loop:
pw_main_loop_run(data.loop);
\endcode
To connect we specify that we have a `PW_DIRECTION_INPUT` stream. `PW_ID_ANY`
means that we are ok with connecting to any producer. We also allow the user
to pass an optional target id.
To connect we specify that we have a `PW_DIRECTION_INPUT` stream. The third
argument is always `PW_ID_ANY`.
We're setting the `PW_STREAM_FLAG_AUTOCONNECT` flag to make an automatic
connection to a suitable camera and `PW_STREAM_FLAG_MAP_BUFFERS` to let the