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gst/: Handle and adjust new-segment events so that downstream really sees a stream with the tag pieces stripped off t...

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Original commit message from CVS:
* gst/id3demux/gstid3demux.c: (gst_id3demux_reset),
(gst_id3demux_send_new_segment), (gst_id3demux_chain),
(gst_id3demux_sink_event):
* gst/id3demux/gstid3demux.h:
* gst/apetag/gsttagdemux.c: (gst_tag_demux_reset),
(gst_tag_demux_chain), (gst_tag_demux_sink_event),
(gst_tag_demux_send_new_segment):
Handle and adjust new-segment events so that downstream really
sees a stream with the tag pieces stripped off the front and back.
Fixes strangeness in seeking when mp3 decoders use the new-segment
byte position to estimate their current playback position timestamp
and then the arriving buffers don't match up.
This commit is contained in:
Jan Schmidt 2007-05-25 10:44:12 +00:00
parent 465a740bbf
commit 4a7ecfb814
4 changed files with 265 additions and 0 deletions
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15
ChangeLog
View file

@ -1,3 +1,18 @@
2007-05-25 Jan Schmidt <thaytan@mad.scientist.com>
* gst/id3demux/gstid3demux.c: (gst_id3demux_reset),
(gst_id3demux_send_new_segment), (gst_id3demux_chain),
(gst_id3demux_sink_event):
* gst/id3demux/gstid3demux.h:
* gst/apetag/gsttagdemux.c: (gst_tag_demux_reset),
(gst_tag_demux_chain), (gst_tag_demux_sink_event),
(gst_tag_demux_send_new_segment):
Handle and adjust new-segment events so that downstream really
sees a stream with the tag pieces stripped off the front and back.
Fixes strangeness in seeking when mp3 decoders use the new-segment
byte position to estimate their current playback position timestamp
and then the arriving buffers don't match up.
2007-05-25 Jan Schmidt <thaytan@mad.scientist.com>
* gst/autodetect/gstautoaudiosink.c: (gst_auto_audio_sink_detect):

126
gst/apetag/gsttagdemux.c
View file

@ -107,6 +107,10 @@ struct _GstTagDemuxPrivate
GstTagList *event_tags;
GstTagList *parsed_tags;
gboolean send_tag_event;
GstSegment segment;
gboolean need_newseg;
gboolean newseg_update;
};
/* Require at least 8kB of data before we attempt typefind.
@ -151,6 +155,7 @@ static gboolean gst_tag_demux_pad_query (GstPad * pad, GstQuery * query);
static const GstQueryType *gst_tag_demux_get_query_types (GstPad * pad);
static gboolean gst_tag_demux_get_upstream_size (GstTagDemux * tagdemux);
static void gst_tag_demux_send_tag_event (GstTagDemux * tagdemux);
static gboolean gst_tag_demux_send_new_segment (GstTagDemux * tagdemux);
static void gst_tag_demux_base_init (gpointer g_class);
static void gst_tag_demux_class_init (gpointer g_class, gpointer d);
@ -236,6 +241,10 @@ gst_tag_demux_reset (GstTagDemux * tagdemux)
gst_tag_list_free (tagdemux->priv->parsed_tags);
tagdemux->priv->parsed_tags = NULL;
}
gst_segment_init (&tagdemux->priv->segment, GST_FORMAT_UNDEFINED);
tagdemux->priv->need_newseg = TRUE;
tagdemux->priv->newseg_update = FALSE;
}
static void
@ -548,6 +557,18 @@ gst_tag_demux_chain (GstPad * pad, GstBuffer * buf)
demux = GST_TAG_DEMUX (GST_PAD_PARENT (pad));
g_return_val_if_fail (GST_IS_TAG_DEMUX (demux), GST_FLOW_ERROR);
/* Update our segment last_stop info */
if (demux->priv->segment.format == GST_FORMAT_BYTES) {
if (GST_BUFFER_OFFSET_IS_VALID (buf))
demux->priv->segment.last_stop = GST_BUFFER_OFFSET (buf);
demux->priv->segment.last_stop += GST_BUFFER_SIZE (buf);
} else if (demux->priv->segment.format == GST_FORMAT_TIME) {
if (GST_BUFFER_TIMESTAMP_IS_VALID (buf))
demux->priv->segment.last_stop = GST_BUFFER_TIMESTAMP (buf);
if (GST_BUFFER_DURATION_IS_VALID (buf))
demux->priv->segment.last_stop += GST_BUFFER_DURATION (buf);
}
if (demux->priv->collect == NULL) {
demux->priv->collect = buf;
} else {
@ -647,6 +668,15 @@ gst_tag_demux_chain (GstPad * pad, GstBuffer * buf)
outbuf = gst_buffer_make_metadata_writable (outbuf);
gst_buffer_set_caps (outbuf, GST_PAD_CAPS (demux->priv->srcpad));
/* Might need a new segment before the buffer */
if (demux->priv->need_newseg) {
if (!gst_tag_demux_send_new_segment (demux)) {
GST_DEBUG_OBJECT (demux, "Failed to send new segment event");
goto error;
}
demux->priv->need_newseg = FALSE;
}
return gst_pad_push (demux->priv->srcpad, outbuf);
}
}
@ -675,6 +705,22 @@ gst_tag_demux_sink_event (GstPad * pad, GstEvent * event)
}
ret = gst_pad_event_default (pad, event);
break;
case GST_EVENT_NEWSEGMENT:{
gboolean update;
gdouble rate, arate;
GstFormat format;
gint64 start, stop, position;
gst_event_parse_new_segment_full (event, &update, &rate, &arate,
&format, &start, &stop, &position);
gst_segment_set_newsegment_full (&demux->priv->segment, update, rate,
arate, format, start, stop, position);
demux->priv->newseg_update = update;
demux->priv->need_newseg = TRUE;
ret = TRUE;
break;
}
default:
ret = gst_pad_event_default (pad, event);
break;
@ -1343,3 +1389,83 @@ gst_tag_demux_send_tag_event (GstTagDemux * demux)
gst_pad_push_event (demux->priv->srcpad, event);
}
}
static gboolean
gst_tag_demux_send_new_segment (GstTagDemux * tagdemux)
{
GstEvent *event;
gint64 start, stop, position;
GstSegment *seg = &tagdemux->priv->segment;
if (seg->format == GST_FORMAT_UNDEFINED) {
GST_LOG_OBJECT (tagdemux,
"No new segment received before first buffer. Using default");
gst_segment_set_newsegment (seg, FALSE, 1.0,
GST_FORMAT_BYTES, tagdemux->priv->strip_start, -1,
tagdemux->priv->strip_start);
}
/* Can't adjust segments in non-BYTES formats */
if (tagdemux->priv->segment.format != GST_FORMAT_BYTES) {
event = gst_event_new_new_segment_full (tagdemux->priv->newseg_update,
seg->rate, seg->applied_rate, seg->format, seg->start,
seg->stop, seg->time);
return gst_pad_push_event (tagdemux->priv->srcpad, event);
}
start = seg->start;
stop = seg->stop;
position = seg->time;
g_return_val_if_fail (start != -1, FALSE);
g_return_val_if_fail (position != -1, FALSE);
if (tagdemux->priv->strip_end > 0) {
if (gst_tag_demux_get_upstream_size (tagdemux)) {
guint64 v1tag_offset =
tagdemux->priv->upstream_size - tagdemux->priv->strip_end;
if (start >= v1tag_offset) {
/* Segment is completely within the ID3v1 tag, output an open-ended
* segment, even though all the buffers will get trimmed away */
start = v1tag_offset;
stop = -1;
}
if (stop != -1 && stop >= v1tag_offset) {
GST_DEBUG_OBJECT (tagdemux,
"Segment crosses the ID3v1 tag. Trimming end");
stop = v1tag_offset;
}
}
}
if (tagdemux->priv->strip_start > 0) {
if (start > tagdemux->priv->strip_start)
start -= tagdemux->priv->strip_start;
else
start = 0;
if (position > tagdemux->priv->strip_start)
position -= tagdemux->priv->strip_start;
else
position = 0;
if (stop != -1) {
if (stop > tagdemux->priv->strip_start)
stop -= tagdemux->priv->strip_start;
else
stop = 0;
}
}
GST_DEBUG_OBJECT (tagdemux,
"Sending new segment update %d, rate %g, format %d, "
"start %" G_GINT64_FORMAT ", stop %" G_GINT64_FORMAT ", position %"
G_GINT64_FORMAT, tagdemux->priv->newseg_update, seg->rate, seg->format,
start, stop, position);
event = gst_event_new_new_segment_full (tagdemux->priv->newseg_update,
seg->rate, seg->applied_rate, seg->format, start, stop, position);
return gst_pad_push_event (tagdemux->priv->srcpad, event);
}

120
gst/id3demux/gstid3demux.c
View file

@ -117,6 +117,7 @@ static gboolean gst_id3demux_pad_query (GstPad * pad, GstQuery * query);
static const GstQueryType *gst_id3demux_get_query_types (GstPad * pad);
static gboolean id3demux_get_upstream_size (GstID3Demux * id3demux);
static void gst_id3demux_send_tag_event (GstID3Demux * id3demux);
static gboolean gst_id3demux_send_new_segment (GstID3Demux * id3demux);
static GstElementClass *parent_class = NULL;
@ -206,6 +207,88 @@ gst_id3demux_reset (GstID3Demux * id3demux)
id3demux->parsed_tags = NULL;
}
gst_segment_init (&id3demux->segment, GST_FORMAT_UNDEFINED);
id3demux->need_newseg = TRUE;
id3demux->newseg_update = FALSE;
}
static gboolean
gst_id3demux_send_new_segment (GstID3Demux * id3demux)
{
GstEvent *event;
gint64 start, stop, position;
GstSegment *seg = &id3demux->segment;
if (seg->format == GST_FORMAT_UNDEFINED) {
GST_LOG_OBJECT (id3demux,
"No new segment received before first buffer. Using default");
gst_segment_set_newsegment (seg, FALSE, 1.0,
GST_FORMAT_BYTES, id3demux->strip_start, -1, id3demux->strip_start);
}
/* Can't adjust segments in non-BYTES formats */
if (id3demux->segment.format != GST_FORMAT_BYTES) {
event = gst_event_new_new_segment_full (id3demux->newseg_update,
seg->rate, seg->applied_rate, seg->format, seg->start,
seg->stop, seg->time);
return gst_pad_push_event (id3demux->srcpad, event);
}
start = seg->start;
stop = seg->stop;
position = seg->time;
g_return_val_if_fail (start != -1, FALSE);
g_return_val_if_fail (position != -1, FALSE);
if (id3demux->strip_end > 0) {
if (id3demux_get_upstream_size (id3demux)) {
guint64 v1tag_offset = id3demux->upstream_size - id3demux->strip_end;
if (start >= v1tag_offset) {
/* Segment is completely within the ID3v1 tag, output an open-ended
* segment, even though all the buffers will get trimmed away */
start = v1tag_offset;
stop = -1;
}
if (stop != -1 && stop >= v1tag_offset) {
GST_DEBUG_OBJECT (id3demux,
"Segment crosses the ID3v1 tag. Trimming end");
stop = v1tag_offset;
}
}
}
if (id3demux->strip_start > 0) {
if (start > id3demux->strip_start)
start -= id3demux->strip_start;
else
start = 0;
if (position > id3demux->strip_start)
position -= id3demux->strip_start;
else
position = 0;
if (stop != -1) {
if (stop > id3demux->strip_start)
stop -= id3demux->strip_start;
else
stop = 0;
}
}
GST_DEBUG_OBJECT (id3demux,
"Sending new segment update %d, rate %g, format %d, "
"start %" G_GINT64_FORMAT ", stop %" G_GINT64_FORMAT ", position %"
G_GINT64_FORMAT, id3demux->newseg_update, seg->rate, seg->format,
start, stop, position);
event = gst_event_new_new_segment_full (id3demux->newseg_update,
seg->rate, seg->applied_rate, seg->format, start, stop, position);
return gst_pad_push_event (id3demux->srcpad, event);
}
static void
@ -409,6 +492,18 @@ gst_id3demux_chain (GstPad * pad, GstBuffer * buf)
id3demux = GST_ID3DEMUX (GST_PAD_PARENT (pad));
g_return_val_if_fail (GST_IS_ID3DEMUX (id3demux), GST_FLOW_ERROR);
/* Update our segment last_stop info */
if (id3demux->segment.format == GST_FORMAT_BYTES) {
if (GST_BUFFER_OFFSET_IS_VALID (buf))
id3demux->segment.last_stop = GST_BUFFER_OFFSET (buf);
id3demux->segment.last_stop += GST_BUFFER_SIZE (buf);
} else if (id3demux->segment.format == GST_FORMAT_TIME) {
if (GST_BUFFER_TIMESTAMP_IS_VALID (buf))
id3demux->segment.last_stop = GST_BUFFER_TIMESTAMP (buf);
if (GST_BUFFER_DURATION_IS_VALID (buf))
id3demux->segment.last_stop += GST_BUFFER_DURATION (buf);
}
if (id3demux->collect == NULL) {
id3demux->collect = buf;
} else {
@ -549,6 +644,15 @@ gst_id3demux_chain (GstPad * pad, GstBuffer * buf)
outbuf = gst_buffer_make_metadata_writable (outbuf);
gst_buffer_set_caps (outbuf, GST_PAD_CAPS (id3demux->srcpad));
/* Might need a new segment before the buffer */
if (id3demux->need_newseg) {
if (!gst_id3demux_send_new_segment (id3demux)) {
GST_DEBUG_OBJECT (id3demux, "Failed to send new segment event");
goto error;
}
id3demux->need_newseg = FALSE;
}
return gst_pad_push (id3demux->srcpad, outbuf);
}
}
@ -577,6 +681,22 @@ gst_id3demux_sink_event (GstPad * pad, GstEvent * event)
}
ret = gst_pad_event_default (pad, event);
break;
case GST_EVENT_NEWSEGMENT:{
gboolean update;
gdouble rate, arate;
GstFormat format;
gint64 start, stop, position;
gst_event_parse_new_segment_full (event, &update, &rate, &arate,
&format, &start, &stop, &position);
gst_segment_set_newsegment_full (&demux->segment, update, rate,
arate, format, start, stop, position);
demux->newseg_update = update;
demux->need_newseg = TRUE;
ret = TRUE;
break;
}
default:
ret = gst_pad_event_default (pad, event);
break;

4
gst/id3demux/gstid3demux.h
View file

@ -65,6 +65,10 @@ struct _GstID3Demux
GstTagList *event_tags;
GstTagList *parsed_tags;
gboolean send_tag_event;
GstSegment segment;
gboolean need_newseg;
gboolean newseg_update;
};
struct _GstID3DemuxClass