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qtmux: correctly track chunk size of subtitle stream

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... thereby ensuring correct chunk offset tracking for all streams.
This commit is contained in:
Mark Nauwelaerts 2017-07-01 18:59:07 +02:00
parent afbabaefbe
commit d1d149ce82
1 changed files with 23 additions and 8 deletions
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31
gst/isomp4/gstqtmux.c
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@ -3901,6 +3901,23 @@ gst_qt_mux_register_and_push_sample (GstQTMux * qtmux, GstQTPad * pad,
return ret;
}
static void
gst_qt_mux_register_buffer_in_chunk (GstQTMux * qtmux, GstQTPad * pad,
guint buffer_size, GstClockTime duration)
{
/* not that much happens here,
* but updating any of this very likely needs to happen all in sync,
* unless there is a very good reason not to */
/* for computing the avg bitrate */
pad->total_bytes += buffer_size;
pad->total_duration += duration;
/* for keeping track of where we are in chunk;
* ensures that data really is located as recorded in atoms */
qtmux->current_chunk_size += buffer_size;
qtmux->current_chunk_duration += duration;
}
static GstFlowReturn
gst_qt_mux_check_and_update_timecode (GstQTMux * qtmux, GstQTPad * pad,
GstBuffer * buf, GstFlowReturn ret)
@ -4237,11 +4254,7 @@ gst_qt_mux_add_buffer (GstQTMux * qtmux, GstQTPad * pad, GstBuffer * buf)
}
}
/* for computing the avg bitrate */
pad->total_bytes += buffer_size;
pad->total_duration += duration;
qtmux->current_chunk_size += buffer_size;
qtmux->current_chunk_duration += duration;
gst_qt_mux_register_buffer_in_chunk (qtmux, pad, buffer_size, duration);
chunk_offset = qtmux->current_chunk_offset;
@ -4338,19 +4351,21 @@ gst_qt_mux_add_buffer (GstQTMux * qtmux, GstQTPad * pad, GstBuffer * buf)
gint64 empty_duration =
GST_BUFFER_PTS (buf) - (GST_BUFFER_PTS (last_buf) + duration);
gint64 empty_duration_scaled;
guint empty_size;
empty_buf = pad->create_empty_buffer (pad, empty_duration);
empty_duration_scaled = gst_util_uint64_scale_round (empty_duration,
atom_trak_get_timescale (pad->trak), GST_SECOND);
empty_size = gst_buffer_get_size (empty_buf);
pad->total_bytes += gst_buffer_get_size (empty_buf);
pad->total_duration += duration;
gst_qt_mux_register_buffer_in_chunk (qtmux, pad, empty_size,
empty_duration);
ret =
gst_qt_mux_register_and_push_sample (qtmux, pad, empty_buf, FALSE, 1,
last_dts + scaled_duration, empty_duration_scaled,
gst_buffer_get_size (empty_buf), chunk_offset, sync, TRUE, 0);
empty_size, chunk_offset, sync, TRUE, 0);
} else {
/* our only case currently is tx3g subtitles, so there is no reason to fill this yet */
g_assert_not_reached ();