4 short term core API stability
5 -----------------------------
7 Changes that probably impact the API, carefull discussion (IRC) + design doc is required
8 before changes are accepted.
10 target release ! description
12 0.4.1 ! expose and API to query the supported seek formats/flags on
13 (done) ! pads, somthing like an extra arg to gst_pad_set_convert_function
14 ! and gst_pad_set_event_function with some function to query the
15 ! flags and formats. more ideas in docs/random/wtay/query_events
16 ! (API: medium dificulty)
18 0.4.1 ! add event for segment playback/looping and seeking (docs/random/wtay/segments)
19 (done) ! (API: medium dificulty, plugins: HARD to very HARD)
21 ? ! add event to adjust rate (reverse playback, slow motion, frame skipping)
22 ! (docs/random/wtay/rate_event)
23 ! (API: medium dificulty, plugins: HARD to very HARD)
25 ? ! add method in the scheduler to set the entry point (frame stepping?)
26 ! (docs/random/wtay/scheduler_entry)
27 ! (API: moderatly EASY, scheduler implementation MEDIUM)
29 0.6.0 ! create a design doc for a timecache implementation,
30 (done) ! (docs/wtay/random/timecache)
31 ! (API: MEDIUM, needs lots of discussion, plugin implementation MEDIUM to HARD)
32 ! (done: implemented using GstIndex base class + subclasses)
34 ? ! implement a QoS event and a policy for handling the event.
35 ! (API: kindof EASY, plugins MEDIUM to very HARD)
37 0.4.1 ! implement user defined GstFormat values, make a format factory etc..
38 (done) ! (API: MEDIUM, plugins MEDIUM)
40 ? ! strip the API to a bare bones minimal set of functions, leave the automatic
41 ! stuff to the app instead of forcing a policy in the core.
42 ! create a library with useful higher level function for people who don't want
43 ! to deal with the lowlevel stuff.
44 ! (HARD, need to negotiate with people :))
46 ? ! use GMarkup to load/save objects, remove dependency on libxml2
47 ! (MEDIUM) breaks API/ABI compatibility
51 shortterm core feature enhancements
52 -----------------------------------
54 0.4.1 ! Implement PAD_DISABLED. This requires simple checks in the scheduler so that
55 ! it doesn't try to pull/push data from/to a disabled pad.
56 ! When an element goes to the PAUSED state, all of its pads should be disabled.
57 ! This should also work for ghostpads.
58 ! (API: MEDIUM to moderatly HARD, requires some scheduler understanding)
64 Writing docs is NOT boring, you learn a lot, you get insight in stuff, you help a lot
65 of people, hey! you might even find YOUR book on a shelf in a bookstore!!
68 ? ! plugin writers guide
69 ! (we have almost nothing, so any start is welcomed)
72 ? ! app writers guide needs to cover common tips and tricks and HOWTOs
76 short to midterm policy definition
77 ----------------------------------
79 Policy definition is closely related to a HOWTO but sometimes needs some thinking.
82 ? ! document thread safety guidelines, what stuff needs locking in the app, what
83 ! is done in the core.
84 ! most of this stuff is in the heads of various people but needs to be written
85 ! down so that people get more insights into the design and vision of GStreamer.
86 ! (MEDIUM, some research and discussion needed)
88 ? ! a step by step guide to the implementation of various events in a plugin, what can you
89 ! do, when is data passing forbidden etc..
90 ! (MEDIUM, some research needed)
92 ? ! figure out a policy for the NEW_MEDIA event
95 ? ! figure out how to better handle clock resync
100 midterm feature enhancement
101 ---------------------------
103 0.6.0 | Define and implement a syntax in gst_parse to handle filtered pad connections.
106 ? | Figure out a way to set properties on schedulers (and bins?) from gst_parse.
109 ? | Make gst-inspect do inspection of plugins, schedulers, autopluggers, types.
110 | An idea would be to make -inspect output an XML representation of the objects
111 | and use XSLT to transform this into text, HTML, docbook, ...
116 midterm (longterm) optimisations
117 --------------------------------
119 These optimisations can be done without changing the existing API.
122 (in progress) ! implement an optimal scheduler that uses chaining when possible
123 ! (HARD, requires detailed knowledge of element scheduling)
125 ? ! alternatively optimisations to the current scheduler can be done such
126 ! as: do nothing when the pipeline structure (or chain) has not changed
129 ? ! GstQueue is a little mess. implement a better queue (lockfree?), refactor
130 ! queueing policy (max buffer, max time, levels etc..)
131 ! (MEDIUM to farily EASY)
134 longterm feature enhancements
135 -----------------------------
137 Various features that are not critical yet.
139 ? ! factory aliases. map a generic name like "videosink" to and actual
140 ! user configurable plugin (aasink, sdlsink, xvideosink, ...)
143 ? ! property proxy in compount elements. not sure if it's possible at all.
144 ! what with elements with the same property?
145 ! (MEDIUM, needs some thinking)
147 ? ! Make _pad_select work for muxers
154 Some stuff that needs to be figured out based on a pro/con comparison.
156 ? ! can we decide on the fact that downstream events are traveling using the
157 ! scheduler? do we need to reevaluate that design decision?
158 ! (MEDIUM, needs pros vs cons document)
164 Benchmarks are always good to get acceptance in a wider comunity or to identify performance
165 problems that need fixing.
167 ? ! do a latency comparison with popular other frameworks, document GStreamer
169 ! (MEDIUM to somewhat EASY)