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docs: xrefs more api around GstStateChange and GstStateChangeReturn.

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This commit is contained in:
Stefan Kost 2011-05-28 10:24:37 +03:00
parent dd6a5d81c4
commit 6c2024f881
1 changed files with 26 additions and 25 deletions
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51
gst/gstelement.h
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@ -85,8 +85,8 @@ G_BEGIN_DECLS
* cannot produce data in %GST_STATE_PAUSED.
* This typically happens with live sources.
*
* The possible return values from a state change function. Only
* @GST_STATE_CHANGE_FAILURE is a real failure.
* The possible return values from a state change function such as
* gst_element_set_state(). Only @GST_STATE_CHANGE_FAILURE is a real failure.
*/
typedef enum {
GST_STATE_CHANGE_FAILURE = 0,
@ -195,17 +195,17 @@ typedef enum {
* Streaming threads are started.
* </para></listitem>
* <listitem><para>
* Some elements might need to return ASYNC and complete the state change
* when they have enough information. It is a requirement for sinks to
* return ASYNC and complete the state change when they receive the first
* buffer or EOS event (preroll). Sinks also block the dataflow when in
* PAUSED.
* Some elements might need to return %GST_STATE_CHANGE_ASYNC and complete
* the state change when they have enough information. It is a requirement
* for sinks to return %GST_STATE_CHANGE_ASYNC and complete the state change
* when they receive the first buffer or %GST_EVENT_EOS (preroll).
* Sinks also block the dataflow when in PAUSED.
* </para></listitem>
* <listitem><para>
* A pipeline resets the running_time to 0.
* </para></listitem>
* <listitem><para>
* Live sources return NO_PREROLL and don't generate data.
* Live sources return %GST_STATE_CHANGE_NO_PREROLL and don't generate data.
* </para></listitem>
* </itemizedlist>
* @GST_STATE_CHANGE_PAUSED_TO_PLAYING: state change from PAUSED to PLAYING.
@ -214,12 +214,12 @@ typedef enum {
* Most elements ignore this state change.
* </para></listitem>
* <listitem><para>
* The pipeline selects a clock and distributes this to all the children
* The pipeline selects a #GstClock and distributes this to all the children
* before setting them to PLAYING. This means that it is only alowed to
* synchronize on the clock in the PLAYING state.
* synchronize on the #GstClock in the PLAYING state.
* </para></listitem>
* <listitem><para>
* The pipeline uses the clock and the running_time to calculate the
* The pipeline uses the #GstClock and the running_time to calculate the
* base_time. The base_time is distributed to all children when performing
* the state change.
* </para></listitem>
@ -228,15 +228,15 @@ typedef enum {
* rendering the data.
* </para></listitem>
* <listitem><para>
* Sinks can post the EOS message in the PLAYING state. It is not allowed to
* post EOS when not in the PLAYING state.
* Sinks can post %GST_MESSAGE_EOS in the PLAYING state. It is not allowed
* to post %GST_MESSAGE_EOS when not in the PLAYING state.
* </para></listitem>
* <listitem><para>
* While streaming in PAUSED or PLAYING elements can create and remove
* sometimes pads.
* </para></listitem>
* <listitem><para>
* Live sources start generating data and return SUCCESS.
* Live sources start generating data and return %GST_STATE_CHANGE_SUCCESS.
* </para></listitem>
* </itemizedlist>
* @GST_STATE_CHANGE_PLAYING_TO_PAUSED: state change from PLAYING to PAUSED.
@ -245,24 +245,25 @@ typedef enum {
* Most elements ignore this state change.
* </para></listitem>
* <listitem><para>
* The pipeline calculates the running_time based on the last selected clock
* and the base_time. It stores this information to continue playback when
* going back to the PLAYING state.
* The pipeline calculates the running_time based on the last selected
* #GstClock and the base_time. It stores this information to continue
* playback when going back to the PLAYING state.
* </para></listitem>
* <listitem><para>
* Sinks unblock any clock wait calls.
* Sinks unblock any #GstClock wait calls.
* </para></listitem>
* <listitem><para>
* When a sink does not have a pending buffer to play, it returns ASYNC from
* this state change and completes the state change when it receives a new
* buffer or an EOS event.
* When a sink does not have a pending buffer to play, it returns
* %GST_STATE_CHANGE_ASYNC from this state change and completes the state
* change when it receives a new buffer or an %GST_EVENT_EOS.
* </para></listitem>
* <listitem><para>
* Any queued EOS messages are removed since they will be reposted when going
* back to the PLAYING state. The EOS messages are queued in GstBins.
* Any queued %GST_MESSAGE_EOS items are removed since they will be reposted
* when going back to the PLAYING state. The EOS messages are queued in
* #GstBin containers.
* </para></listitem>
* <listitem><para>
* Live sources stop generating data and return NO_PREROLL.
* Live sources stop generating data and return %GST_STATE_CHANGE_NO_PREROLL.
* </para></listitem>
* </itemizedlist>
* @GST_STATE_CHANGE_PAUSED_TO_READY : state change from PAUSED to READY.
@ -274,7 +275,7 @@ typedef enum {
* Elements unblock any waits on devices
* </para></listitem>
* <listitem><para>
* Chain or get_range functions return WRONG_STATE.
* Chain or get_range functions return %GST_FLOW_WRONG_STATE.
* </para></listitem>
* <listitem><para>
* The element pads are deactivated so that streaming becomes impossible and