* @GST_SEEK_FLAG_KEY_UNIT: seek to the nearest keyframe. This might be
* faster but less accurate.
* @GST_SEEK_FLAG_SEGMENT: perform a segment seek.
- * @GST_SEEK_FLAG_SKIP: when doing fast forward or fast reverse playback, allow
+ * @GST_SEEK_FLAG_TRICKMODE: when doing fast forward or fast reverse playback, allow
* elements to skip frames instead of generating all
- * frames.
+ * frames. (Since: 1.6)
* @GST_SEEK_FLAG_SNAP_BEFORE: go to a location before the requested position,
* if KEY_UNIT this means the keyframe at or before the
* requested position the one at or before the seek target.
* if KEY_UNIT this means the keyframe closest to the
* requested position, if both keyframes are at an equal
* distance, behaves like SNAP_BEFORE.
+ * @GST_SEEK_FLAG_TRICKMODE_KEY_UNITS: when doing fast forward or fast reverse
+ * playback, request that elements only decode keyframes
+ * and skip all other content, for formats that have
+ * keyframes. (Since: 1.6)
+ * @GST_SEEK_FLAG_TRICKMODE_NO_AUDIO: when doing fast forward or fast reverse
+ * playback, request that audio decoder elements skip
+ * decoding and output only gap events or silence. (Since: 1.6)
+ * @GST_SEEK_FLAG_SKIP: Deprecated backward compatibility flag, replaced
+ * by @GST_SEEK_FLAG_TRICKMODE
*
* Flags to be used with gst_element_seek() or gst_event_new_seek(). All flags
* can be used together.
* looping or simple linear editing.
*
* When doing fast forward (rate > 1.0) or fast reverse (rate < -1.0) trickmode
- * playback, the @GST_SEEK_FLAG_SKIP flag can be used to instruct decoders
+ * playback, the @GST_SEEK_FLAG_TRICKMODE flag can be used to instruct decoders
* and demuxers to adjust the playback rate by skipping frames. This can improve
* performance and decrease CPU usage because not all frames need to be decoded.
*
+ * Beyond that, the @GST_SEEK_FLAG_TRICKMODE_KEY_UNITS flag can be used to
+ * request that decoders skip all frames except key units, and
+ * @GST_SEEK_FLAG_TRICKMODE_NO_AUDIO flags can be used to request that audio
+ * decoders do no decoding at all, and simple output silence.
+ *
* The @GST_SEEK_FLAG_SNAP_BEFORE flag can be used to snap to the previous
* relevant location, and the @GST_SEEK_FLAG_SNAP_AFTER flag can be used to
* select the next relevant location. If KEY_UNIT is specified, the relevant
GST_SEEK_FLAG_ACCURATE = (1 << 1),
GST_SEEK_FLAG_KEY_UNIT = (1 << 2),
GST_SEEK_FLAG_SEGMENT = (1 << 3),
+ GST_SEEK_FLAG_TRICKMODE = (1 << 4),
+ /* FIXME 2.0: Remove _SKIP flag,
+ * which was kept for backward compat when _TRICKMODE was added */
GST_SEEK_FLAG_SKIP = (1 << 4),
GST_SEEK_FLAG_SNAP_BEFORE = (1 << 5),
GST_SEEK_FLAG_SNAP_AFTER = (1 << 6),
GST_SEEK_FLAG_SNAP_NEAREST = GST_SEEK_FLAG_SNAP_BEFORE | GST_SEEK_FLAG_SNAP_AFTER,
/* Careful to restart next flag with 1<<7 here */
+ GST_SEEK_FLAG_TRICKMODE_KEY_UNITS = (1 << 7),
+ GST_SEEK_FLAG_TRICKMODE_NO_AUDIO = (1 << 8),
} GstSeekFlags;
/**
* @GST_SEGMENT_FLAG_NONE: no flags
* @GST_SEGMENT_FLAG_RESET: reset the pipeline running_time to the segment
* running_time
- * @GST_SEGMENT_FLAG_SKIP: perform skip playback
+ * @GST_SEGMENT_FLAG_TRICKMODE: perform skip playback (Since: 1.6)
* @GST_SEGMENT_FLAG_SEGMENT: send SEGMENT_DONE instead of EOS
+ * @GST_SEGMENT_FLAG_TRICKMODE_KEY_UNITS: Decode only keyframes, where
+ * possible (Since: 1.6)
+ * @GST_SEGMENT_FLAG_TRICKMODE_NO_AUDIO: Do not decode any audio, where
+ * possible (Since: 1.6)
+ * @GST_SEGMENT_FLAG_SKIP: Deprecated backward compatibility flag, replaced
+ * by @GST_SEGMENT_FLAG_TRICKMODE
*
* Flags for the GstSegment structure. Currently mapped to the corresponding
* values of the seek flags.
typedef enum { /*< flags >*/
GST_SEGMENT_FLAG_NONE = GST_SEEK_FLAG_NONE,
GST_SEGMENT_FLAG_RESET = GST_SEEK_FLAG_FLUSH,
- GST_SEGMENT_FLAG_SKIP = GST_SEEK_FLAG_SKIP,
- GST_SEGMENT_FLAG_SEGMENT = GST_SEEK_FLAG_SEGMENT
+ GST_SEGMENT_FLAG_TRICKMODE = GST_SEEK_FLAG_TRICKMODE,
+ /* FIXME 2.0: Remove _SKIP flag,
+ * which was kept for backward compat when _TRICKMODE was added */
+ GST_SEGMENT_FLAG_SKIP = GST_SEEK_FLAG_TRICKMODE,
+ GST_SEGMENT_FLAG_SEGMENT = GST_SEEK_FLAG_SEGMENT,
+ GST_SEGMENT_FLAG_TRICKMODE_KEY_UNITS = GST_SEEK_FLAG_TRICKMODE_KEY_UNITS,
+ GST_SEGMENT_FLAG_TRICKMODE_NO_AUDIO = GST_SEEK_FLAG_TRICKMODE_NO_AUDIO
} GstSegmentFlags;
/**