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Implement negotiation

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Use generic byte blobs for formats. We currently use them to store
gstreamer caps but we could also use them to exchange serialized
GVariants if we want.

Make properties a variant dictionary
This commit is contained in:
Wim Taymans 2015-05-14 17:46:12 +02:00
parent ca7e4602f6
commit 4bc308835a
21 changed files with 620 additions and 582 deletions
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53
src/dbus/org.pulsevideo.xml
View file

@ -53,25 +53,24 @@
<method name='Disconnect'/>
<!-- CreateSourceOutput:
@source: the Source1 object path or / for default
@props: input properties
@incaps: input capabilities
@output: the SourceOutput1 object path
Create a new output for @source with given @props
Create a new output for @source with given @incaps
-->
<method name='CreateSourceOutput'>
<arg type='o' name='source' direction='in'/>
<arg type='a{sv}' name='props' direction='in'/>
<arg type='s' name='accepted_formats' direction='in'/>
<arg type='o' name='output' direction='out'/>
</method>
<!-- CreateSourceInput:
@props: input properties
@source: the new Source1 object path
@incaps: input capabilities
@input: the SourceInput1 object path
Create a new source and input object with given @props
Create a new source and input object with given @incaps
-->
<method name='CreateSourceInput'>
<arg type='a{sv}' name='props' direction='in'/>
<arg type='s' name='possible_formats' direction='in'/>
<arg type='o' name='input' direction='out'/>
</method>
</interface>
@ -122,18 +121,12 @@
4 = the source is running
-->
<property name='State' type='u' access='read' />
<!-- GetCapabilities:
@props: input properties
@caps: result capabilities
<!-- Capabilities:
Get a list of capabilities of this source. This includes
supported data formats and transports. @props is used to
filter the amount of output capabilities
The capabilities of this source. This includes
supported data formats and transports.
-->
<method name='GetCapabilities'>
<arg type='a{sv}' name='props' direction='in'/>
<arg type='aa{sv}' name='caps' direction='out'/>
</method>
<property name='PossibleFormats' type='s' access='read' />
</interface>
<!--
@ -144,34 +137,28 @@
start/stop the media transport.
-->
<interface name='org.pulsevideo.SourceOutput1'>
<!-- Client: the owner client of this source output -->
<property name='Client' type='o' access='read' />
<!-- Source: the source of this source output -->
<property name='Source' type='o' access='read' />
<!-- Capabilities: capabilities of the source output -->
<property name='PossibleFormats' type='s' access='read' />
<!-- Start:
@props: input properties
@incaps: input capabilities
@fd: output file descriptor
@props: output properties
@outcaps: output capabilities
Start the datatransfer of the source with @props.
Start the datatransfer of the source with @incaps.
The result is a file descriptor that can be used to get metadata
and media. @props contains the final media format and transport
and media. @outcaps contains the final media format and transport
properties.
-->
<method name='Start'>
<arg type='a{sv}' name='props' direction='in'/>
<arg type='s' name='requested_format' direction='in'/>
<arg type='h' name='fd' direction='out'/>
<arg type='a{sv}' name='props' direction='out'/>
<arg type='s' name='format' direction='out'/>
</method>
<!-- RequestReconfigure:
@props: new properties
This signal is fired when the source wants to change the format
or transport. The client should Stop and Start the source output
with new properties
-->
<signal name='RequestReconfigure'>
<arg type='a{sv}' name='props' direction='in'/>
</signal>
<!-- Stop:
Stop data transport