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avidemux: tweak KEY_UNIT SNAP seek handling
Previously, seeking to position y where y is (strictly) within a keyframe would seek to that keyframe both with SNAP_BEFORE and SNAP_AFTER, where the latter is now adjusted to really snap to the next keyframe.
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parent
3362dceb25
commit
494f4beb40
1 changed files with 29 additions and 23 deletions
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@ -72,8 +72,8 @@ static GstStaticPadTemplate sink_templ = GST_STATIC_PAD_TEMPLATE ("sink",
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#ifndef GST_DISABLE_GST_DEBUG
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static const char *const snap_types[2][2] = {
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{"any", "before"},
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{"after", "nearest"},
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{"any", "after"},
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{"before", "nearest"},
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};
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#endif
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@ -2608,8 +2608,9 @@ gst_avi_demux_index_entry_search (GstAviIndexEntry * entry, guint64 * total)
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* @avi: Avi object
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* @stream: the stream
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* @time: a time position
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* @next: whether to look for entry before or after @time
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*
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* Finds the index entry which time is less or equal than the requested time.
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* Finds the index entry which time is less/more or equal than the requested time.
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* Try to avoid binary search when we can convert the time to an index
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* position directly (for example for video frames with a fixed duration).
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*
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@ -2617,7 +2618,7 @@ gst_avi_demux_index_entry_search (GstAviIndexEntry * entry, guint64 * total)
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*/
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static guint
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gst_avi_demux_index_for_time (GstAviDemux * avi,
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GstAviStream * stream, guint64 time)
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GstAviStream * stream, guint64 time, gboolean next)
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{
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guint index = -1;
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guint64 total;
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@ -2638,6 +2639,14 @@ gst_avi_demux_index_for_time (GstAviDemux * avi,
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total = avi_stream_convert_time_to_frames_unchecked (stream, time);
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} else {
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index = avi_stream_convert_time_to_frames_unchecked (stream, time);
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/* this entry typically undershoots the target time,
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* so check a bit more if next needed */
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if (next) {
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GstClockTime itime =
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avi_stream_convert_frames_to_time_unchecked (stream, index);
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if (itime < time && index + 1 < stream->idx_n)
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index++;
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}
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}
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} else if (stream->strh->type == GST_RIFF_FCC_auds) {
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/* constant rate stream */
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@ -2655,7 +2664,7 @@ gst_avi_demux_index_for_time (GstAviDemux * avi,
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entry = gst_util_array_binary_search (stream->index,
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stream->idx_n, sizeof (GstAviIndexEntry),
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(GCompareDataFunc) gst_avi_demux_index_entry_search,
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GST_SEARCH_MODE_BEFORE, &total, NULL);
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next ? GST_SEARCH_MODE_AFTER : GST_SEARCH_MODE_BEFORE, &total, NULL);
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if (entry == NULL) {
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GST_LOG_OBJECT (avi, "not found, assume index 0");
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@ -4447,6 +4456,7 @@ gst_avi_demux_do_seek (GstAviDemux * avi, GstSegment * segment,
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gboolean keyframe, before, after;
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guint i, index;
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GstAviStream *stream;
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gboolean next;
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seek_time = segment->position;
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keyframe = ! !(flags & GST_SEEK_FLAG_KEY_UNIT);
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@ -4461,20 +4471,18 @@ gst_avi_demux_do_seek (GstAviDemux * avi, GstSegment * segment,
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* which is mostly correct... */
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stream = &avi->stream[avi->main_stream];
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next = after && !before;
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if (segment->rate < 0)
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next = !next;
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/* get the entry index for the requested position */
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index = gst_avi_demux_index_for_time (avi, stream, seek_time);
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index = gst_avi_demux_index_for_time (avi, stream, seek_time, next);
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GST_DEBUG_OBJECT (avi, "Got entry %u", index);
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if (index == -1)
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return FALSE;
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/* check if we are already on a keyframe */
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if (!ENTRY_IS_KEYFRAME (&stream->index[index])) {
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gboolean next;
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next = after && !before;
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if (segment->rate < 0)
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next = !next;
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if (next) {
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GST_DEBUG_OBJECT (avi, "not keyframe, searching forward");
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/* now go to the next keyframe, this is where we should start
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@ -4518,7 +4526,7 @@ gst_avi_demux_do_seek (GstAviDemux * avi, GstSegment * segment,
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continue;
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/* get the entry index for the requested position */
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index = gst_avi_demux_index_for_time (avi, ostream, seek_time);
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index = gst_avi_demux_index_for_time (avi, ostream, seek_time, FALSE);
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if (index == -1)
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continue;
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@ -4686,7 +4694,7 @@ avi_demux_handle_seek_push (GstAviDemux * avi, GstPad * pad, GstEvent * event)
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GstSeekFlags flags;
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GstSeekType cur_type = GST_SEEK_TYPE_NONE, stop_type;
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gint64 cur, stop;
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gboolean keyframe, before, after;
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gboolean keyframe, before, after, next;
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GstAviStream *stream;
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guint index;
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guint n, str_num;
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@ -4746,8 +4754,12 @@ avi_demux_handle_seek_push (GstAviDemux * avi, GstPad * pad, GstEvent * event)
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str_num = avi->main_stream;
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stream = &avi->stream[str_num];
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next = after && !before;
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if (seeksegment.rate < 0)
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next = !next;
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/* get the entry index for the requested position */
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index = gst_avi_demux_index_for_time (avi, stream, cur);
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index = gst_avi_demux_index_for_time (avi, stream, cur, next);
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GST_DEBUG_OBJECT (avi, "str %u: Found entry %u for %" GST_TIME_FORMAT,
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str_num, index, GST_TIME_ARGS (cur));
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if (index == -1)
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@ -4755,12 +4767,6 @@ avi_demux_handle_seek_push (GstAviDemux * avi, GstPad * pad, GstEvent * event)
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/* check if we are already on a keyframe */
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if (!ENTRY_IS_KEYFRAME (&stream->index[index])) {
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gboolean next;
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next = after && !before;
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if (seeksegment.rate < 0)
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next = !next;
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if (next) {
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GST_DEBUG_OBJECT (avi, "Entry is not a keyframe - searching forward");
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/* now go to the next keyframe, this is where we should start
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@ -4799,7 +4805,7 @@ avi_demux_handle_seek_push (GstAviDemux * avi, GstPad * pad, GstEvent * event)
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continue;
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/* get the entry index for the requested position */
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idx = gst_avi_demux_index_for_time (avi, str, cur);
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idx = gst_avi_demux_index_for_time (avi, str, cur, FALSE);
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GST_DEBUG_OBJECT (avi, "str %u: Found entry %u for %" GST_TIME_FORMAT, n,
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idx, GST_TIME_ARGS (cur));
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if (idx == -1)
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@ -4807,7 +4813,7 @@ avi_demux_handle_seek_push (GstAviDemux * avi, GstPad * pad, GstEvent * event)
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/* check if we are already on a keyframe */
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if (!ENTRY_IS_KEYFRAME (&str->index[idx])) {
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if (after && !before) {
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if (next) {
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GST_DEBUG_OBJECT (avi, "Entry is not a keyframe - searching forward");
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/* now go to the next keyframe, this is where we should start
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* decoding from. */
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