[Bug 774779] New: Move GstPhotography interface to -base
GStreamer (GNOME Bugzilla)
bugzilla at gnome.org
Mon Nov 21 10:56:21 UTC 2016
https://bugzilla.gnome.org/show_bug.cgi?id=774779
Bug ID: 774779
Summary: Move GstPhotography interface to -base
Classification: Platform
Product: GStreamer
Version: 1.10.0
OS: Linux
Status: NEW
Severity: enhancement
Priority: Normal
Component: gst-plugins-bad
Assignee: gstreamer-bugs at lists.freedesktop.org
Reporter: t.i.m at zen.co.uk
QA Contact: gstreamer-bugs at lists.freedesktop.org
Depends on: 757352
GNOME version: ---
We should move this. It is a prerequisite to moving camerabin.
Some comments/questions after reviewing:
- GST_PHOTOGRAPHY_AUTOFOCUS_DONE: Name of custom GstMessage that will be
posted to #GstBus when autofocusing is complete. Shouldn't we have a
gst_photography_is_autofocus_done_message() for this, just like we have
gst_is_video_overlay_prepare_window_handle_message() and
gst_is_missing_plugin_message(), plus _parse_autofocus_done_message()?
- GST_PHOTOGRAPHY_SHAKE_RISK: same as for AUTOFOCUS done
- GST_PHOTOGRAPHY_PROP_*(): do we really want to require interface implementors
to implement all of these properties? And then again implement setters as
vfuncs? Seems a bit tedious, and also makes it more difficult for
implementors
to only support some of the functionality, doesn't it? (properties are good
for things like automatic UI dialogs of course)
- struct GstPhotographySettings: used to set/get all options in one go. Assumes
implementor supports all options; duplicates other mechanisms of getting and
setting options (wrapper API for interface vfuncs and properties) with a
third
option, and the wrapper func doesn't even have fallback code for when the
interface doesn't implement ::set_config or ::get_config.
- struct GstPhotographySettings: if we keep it it needs padding
- prepare_for_capture: why is the callback not done via a signal instead?
(also, no destroy_notify for user_data, but callback can do that I suppose)
How is failure communicated? Should we differentiate between still image and
video capture?
- typedef void (*GstPhotographyCapturePrepared) (gpointer data, const GstCaps
*configured_caps);
why not GstPhotography-implementing object as first argument?
- set_autofocus: no gboolean return like all the others?
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