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gstbuffer: add GST_BUFFER_FLAG_NON_DROPPABLE

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This can be used to identify buffers for which a higher percentage
of redundancy should be allocated when performing forward error
correction, or to prevent still video frames from being dropped by
elements due to QoS.

https://bugzilla.gnome.org/show_bug.cgi?id=793008
This commit is contained in:
Mathieu Duponchelle 2018-01-30 16:41:39 +01:00
parent e1fdb5bf03
commit ebcdfd2e9c
1 changed files with 48 additions and 42 deletions
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90
gst/gstbuffer.h
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@ -181,55 +181,61 @@ typedef struct _GstBufferPool GstBufferPool;
/**
* GstBufferFlags:
* @GST_BUFFER_FLAG_LIVE: the buffer is live data and should be discarded in
* the PAUSED state.
* @GST_BUFFER_FLAG_DECODE_ONLY: the buffer contains data that should be dropped
* because it will be clipped against the segment
* boundaries or because it does not contain data
* that should be shown to the user.
* @GST_BUFFER_FLAG_DISCONT: the buffer marks a data discontinuity in the stream.
* This typically occurs after a seek or a dropped buffer
* from a live or network source.
* @GST_BUFFER_FLAG_RESYNC: the buffer timestamps might have a discontinuity
* and this buffer is a good point to resynchronize.
* @GST_BUFFER_FLAG_CORRUPTED: the buffer data is corrupted.
* @GST_BUFFER_FLAG_MARKER: the buffer contains a media specific marker. for
* video this is typically the end of a frame boundary, for audio
* this is usually the start of a talkspurt.
* @GST_BUFFER_FLAG_HEADER: the buffer contains header information that is
* needed to decode the following data.
* @GST_BUFFER_FLAG_GAP: the buffer has been created to fill a gap in the
* stream and contains media neutral data (elements can
* switch to optimized code path that ignores the buffer
* content).
* @GST_BUFFER_FLAG_DROPPABLE: the buffer can be dropped without breaking the
* stream, for example to reduce bandwidth.
* @GST_BUFFER_FLAG_DELTA_UNIT: this unit cannot be decoded independently.
* @GST_BUFFER_FLAG_TAG_MEMORY: this flag is set when memory of the buffer
* is added/removed
* @GST_BUFFER_FLAG_SYNC_AFTER: Elements which write to disk or permanent
* @GST_BUFFER_FLAG_LIVE: the buffer is live data and should be discarded in
* the PAUSED state.
* @GST_BUFFER_FLAG_DECODE_ONLY: the buffer contains data that should be dropped
* because it will be clipped against the segment
* boundaries or because it does not contain data
* that should be shown to the user.
* @GST_BUFFER_FLAG_DISCONT: the buffer marks a data discontinuity in the stream.
* This typically occurs after a seek or a dropped buffer
* from a live or network source.
* @GST_BUFFER_FLAG_RESYNC: the buffer timestamps might have a discontinuity
* and this buffer is a good point to resynchronize.
* @GST_BUFFER_FLAG_CORRUPTED: the buffer data is corrupted.
* @GST_BUFFER_FLAG_MARKER: the buffer contains a media specific marker. for
* video this is typically the end of a frame boundary, for audio
* this is usually the start of a talkspurt.
* @GST_BUFFER_FLAG_HEADER: the buffer contains header information that is
* needed to decode the following data.
* @GST_BUFFER_FLAG_GAP: the buffer has been created to fill a gap in the
* stream and contains media neutral data (elements can
* switch to optimized code path that ignores the buffer
* content).
* @GST_BUFFER_FLAG_DROPPABLE: the buffer can be dropped without breaking the
* stream, for example to reduce bandwidth.
* @GST_BUFFER_FLAG_DELTA_UNIT: this unit cannot be decoded independently.
* @GST_BUFFER_FLAG_TAG_MEMORY: this flag is set when memory of the buffer
* is added/removed
* @GST_BUFFER_FLAG_SYNC_AFTER: Elements which write to disk or permanent
* storage should ensure the data is synced after
* writing the contents of this buffer. (Since 1.6)
* @GST_BUFFER_FLAG_LAST: additional media specific flags can be added starting from
* this flag.
* @GST_BUFFER_FLAG_LAST: additional media specific flags can be added starting from
* this flag.
* @GST_BUFFER_FLAG_NON_DROPPABLE: This buffer is important and should not be dropped.
* This can be used to mark important buffers, e.g. to flag
* RTP packets carrying keyframes or codec setup data for RTP
* Forward Error Correction purposes, or to prevent still video
* frames from being dropped by elements due to QoS. (Since 1.14)
*
* A set of buffer flags used to describe properties of a #GstBuffer.
*/
typedef enum {
GST_BUFFER_FLAG_LIVE = (GST_MINI_OBJECT_FLAG_LAST << 0),
GST_BUFFER_FLAG_DECODE_ONLY = (GST_MINI_OBJECT_FLAG_LAST << 1),
GST_BUFFER_FLAG_DISCONT = (GST_MINI_OBJECT_FLAG_LAST << 2),
GST_BUFFER_FLAG_RESYNC = (GST_MINI_OBJECT_FLAG_LAST << 3),
GST_BUFFER_FLAG_CORRUPTED = (GST_MINI_OBJECT_FLAG_LAST << 4),
GST_BUFFER_FLAG_MARKER = (GST_MINI_OBJECT_FLAG_LAST << 5),
GST_BUFFER_FLAG_HEADER = (GST_MINI_OBJECT_FLAG_LAST << 6),
GST_BUFFER_FLAG_GAP = (GST_MINI_OBJECT_FLAG_LAST << 7),
GST_BUFFER_FLAG_DROPPABLE = (GST_MINI_OBJECT_FLAG_LAST << 8),
GST_BUFFER_FLAG_DELTA_UNIT = (GST_MINI_OBJECT_FLAG_LAST << 9),
GST_BUFFER_FLAG_TAG_MEMORY = (GST_MINI_OBJECT_FLAG_LAST << 10),
GST_BUFFER_FLAG_SYNC_AFTER = (GST_MINI_OBJECT_FLAG_LAST << 11),
GST_BUFFER_FLAG_LIVE = (GST_MINI_OBJECT_FLAG_LAST << 0),
GST_BUFFER_FLAG_DECODE_ONLY = (GST_MINI_OBJECT_FLAG_LAST << 1),
GST_BUFFER_FLAG_DISCONT = (GST_MINI_OBJECT_FLAG_LAST << 2),
GST_BUFFER_FLAG_RESYNC = (GST_MINI_OBJECT_FLAG_LAST << 3),
GST_BUFFER_FLAG_CORRUPTED = (GST_MINI_OBJECT_FLAG_LAST << 4),
GST_BUFFER_FLAG_MARKER = (GST_MINI_OBJECT_FLAG_LAST << 5),
GST_BUFFER_FLAG_HEADER = (GST_MINI_OBJECT_FLAG_LAST << 6),
GST_BUFFER_FLAG_GAP = (GST_MINI_OBJECT_FLAG_LAST << 7),
GST_BUFFER_FLAG_DROPPABLE = (GST_MINI_OBJECT_FLAG_LAST << 8),
GST_BUFFER_FLAG_DELTA_UNIT = (GST_MINI_OBJECT_FLAG_LAST << 9),
GST_BUFFER_FLAG_TAG_MEMORY = (GST_MINI_OBJECT_FLAG_LAST << 10),
GST_BUFFER_FLAG_SYNC_AFTER = (GST_MINI_OBJECT_FLAG_LAST << 11),
GST_BUFFER_FLAG_NON_DROPPABLE = (GST_MINI_OBJECT_FLAG_LAST << 12),
GST_BUFFER_FLAG_LAST = (GST_MINI_OBJECT_FLAG_LAST << 16)
GST_BUFFER_FLAG_LAST = (GST_MINI_OBJECT_FLAG_LAST << 16)
} GstBufferFlags;
/**