mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-21 07:46:38 +00:00
tagdemux: don't to data processing in state change
Start a task to perform the pulling and typefind of the tags.
This commit is contained in:
Wim Taymans
parent
ee2c699016
commit
8dd93b897f
1 changed files with 192 additions and 106 deletions
|
|
@ -112,6 +112,8 @@ struct _GstTagDemuxPrivate
|
|||
GstSegment segment;
|
||||
gboolean need_newseg;
|
||||
|
||||
guint64 offset;
|
||||
|
||||
GList *pending_events;
|
||||
};
|
||||
|
||||
|
|
@ -139,6 +141,8 @@ static GstFlowReturn gst_tag_demux_chain (GstPad * pad, GstObject * parent,
|
|||
static gboolean gst_tag_demux_sink_event (GstPad * pad, GstObject * parent,
|
||||
GstEvent * event);
|
||||
|
||||
static gboolean gst_tag_demux_sink_activate_mode (GstPad * pad,
|
||||
GstObject * parent, GstPadMode mode, gboolean active);
|
||||
static gboolean gst_tag_demux_src_activate_mode (GstPad * pad,
|
||||
GstObject * parent, GstPadMode mode, gboolean active);
|
||||
static GstFlowReturn gst_tag_demux_read_range (GstTagDemux * tagdemux,
|
||||
|
|
@ -292,6 +296,8 @@ gst_tag_demux_init (GstTagDemux * demux, GstTagDemuxClass * gclass)
|
|||
if (tmpl) {
|
||||
demux->priv->sinkpad = gst_pad_new_from_template (tmpl, "sink");
|
||||
|
||||
gst_pad_set_activatemode_function (demux->priv->sinkpad,
|
||||
GST_DEBUG_FUNCPTR (gst_tag_demux_sink_activate_mode));
|
||||
gst_pad_set_activate_function (demux->priv->sinkpad,
|
||||
GST_DEBUG_FUNCPTR (gst_tag_demux_sink_activate));
|
||||
gst_pad_set_event_function (demux->priv->sinkpad,
|
||||
|
|
@ -703,6 +709,10 @@ gst_tag_demux_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
|
|||
case GST_EVENT_FLUSH_START:
|
||||
ret = gst_pad_event_default (pad, parent, event);
|
||||
break;
|
||||
case GST_EVENT_CAPS:
|
||||
/* we drop the caps event. We do typefind and push a new caps event. */
|
||||
ret = gst_pad_event_default (pad, parent, event);
|
||||
break;
|
||||
default:
|
||||
if (demux->priv->need_newseg && GST_EVENT_IS_SERIALIZED (event)) {
|
||||
/* Cache all events if we have a pending segment, so they don't get
|
||||
|
|
@ -1078,33 +1088,191 @@ done:
|
|||
return res;
|
||||
}
|
||||
|
||||
/* This function operates similarly to gst_type_find_element_activate
|
||||
/* This function operates similarly to gst_type_find_element_loop
|
||||
* in the typefind element
|
||||
* 1. try to activate in pull mode. if not, switch to push and succeed.
|
||||
* 2. try to read tags in pull mode
|
||||
* 3. typefind the contents
|
||||
* 4. deactivate pull mode.
|
||||
* 5. if we didn't find any caps, fail.
|
||||
* 6. Add the srcpad
|
||||
* 7. if the sink pad is activated, we are in pull mode. succeed.
|
||||
* otherwise activate both pads in push mode and succeed.
|
||||
* 1. try to read tags in pull mode
|
||||
* 2. typefind the contents
|
||||
* 3. if we didn't find any caps, fail.
|
||||
* 4. set caps on srcpad
|
||||
*/
|
||||
static gboolean
|
||||
gst_tag_demux_sink_activate (GstPad * sinkpad, GstObject * parent)
|
||||
static void
|
||||
gst_tag_demux_element_loop (GstTagDemux * demux)
|
||||
{
|
||||
GstTypeFindProbability probability = 0;
|
||||
GstTagDemuxClass *klass;
|
||||
GstTagDemux *demux;
|
||||
GstTypeFindProbability probability = 0;
|
||||
GstFlowReturn ret = GST_FLOW_OK;
|
||||
GstTagList *start_tags = NULL;
|
||||
GstTagList *end_tags = NULL;
|
||||
gboolean e_tag_ok, s_tag_ok;
|
||||
gboolean ret = FALSE;
|
||||
GstCaps *caps = NULL;
|
||||
|
||||
/* Look for tags at start and end of file */
|
||||
GST_DEBUG_OBJECT (demux, "Activated pull mode. Looking for tags");
|
||||
if (!gst_tag_demux_get_upstream_size (demux))
|
||||
goto no_size;
|
||||
|
||||
demux->priv->strip_start = 0;
|
||||
demux->priv->strip_end = 0;
|
||||
|
||||
/* 1 - Read tags */
|
||||
s_tag_ok = gst_tag_demux_pull_start_tag (demux, &start_tags);
|
||||
e_tag_ok = gst_tag_demux_pull_end_tag (demux, &end_tags);
|
||||
|
||||
klass = GST_TAG_DEMUX_CLASS (G_OBJECT_GET_CLASS (demux));
|
||||
|
||||
if (klass->merge_tags != NULL) {
|
||||
demux->priv->parsed_tags = klass->merge_tags (demux, start_tags, end_tags);
|
||||
} else {
|
||||
/* we merge in REPLACE mode, so put the less important tags first, which
|
||||
* we'll just assume is the end tag (subclasses may change this behaviour
|
||||
* or make it configurable by overriding the merge_tags vfunc) */
|
||||
demux->priv->parsed_tags =
|
||||
gst_tag_list_merge (end_tags, start_tags, GST_TAG_MERGE_REPLACE);
|
||||
}
|
||||
|
||||
if (start_tags)
|
||||
gst_tag_list_free (start_tags);
|
||||
if (end_tags)
|
||||
gst_tag_list_free (end_tags);
|
||||
|
||||
if (!e_tag_ok && !s_tag_ok)
|
||||
goto no_tags;
|
||||
|
||||
if (demux->priv->parsed_tags != NULL) {
|
||||
demux->priv->send_tag_event = TRUE;
|
||||
}
|
||||
|
||||
if (demux->priv->upstream_size <=
|
||||
demux->priv->strip_start + demux->priv->strip_end)
|
||||
goto no_data;
|
||||
|
||||
/* 2 - Do typefinding on data */
|
||||
caps = gst_type_find_helper_get_range (GST_OBJECT (demux), NULL,
|
||||
(GstTypeFindHelperGetRangeFunction) gst_tag_demux_read_range,
|
||||
demux->priv->upstream_size
|
||||
- (demux->priv->strip_start + demux->priv->strip_end), NULL,
|
||||
&probability);
|
||||
|
||||
GST_DEBUG_OBJECT (demux, "Found type %" GST_PTR_FORMAT " with a "
|
||||
"probability of %u", caps, probability);
|
||||
|
||||
/* 3 - If we didn't find the caps, fail */
|
||||
if (caps == NULL)
|
||||
goto no_caps;
|
||||
|
||||
/* tag reading and typefinding were already done, don't do them again in
|
||||
* the chain function if we end up in push mode */
|
||||
demux->priv->state = GST_TAG_DEMUX_STREAMING;
|
||||
|
||||
/* 6 Set the srcpad caps now we know them */
|
||||
gst_tag_demux_set_src_caps (demux, caps);
|
||||
|
||||
if (caps)
|
||||
gst_caps_unref (caps);
|
||||
|
||||
/* now we pause */
|
||||
goto pause;
|
||||
|
||||
/* ERRORS */
|
||||
no_size:
|
||||
{
|
||||
GST_ELEMENT_ERROR (demux, STREAM, TYPE_NOT_FOUND,
|
||||
("Could not get stream size"), (NULL));
|
||||
ret = GST_FLOW_ERROR;
|
||||
goto pause;
|
||||
}
|
||||
no_tags:
|
||||
{
|
||||
GST_ELEMENT_ERROR (demux, STREAM, TYPE_NOT_FOUND,
|
||||
("Could not get start and/or end tag"), (NULL));
|
||||
ret = GST_FLOW_ERROR;
|
||||
goto pause;
|
||||
}
|
||||
no_data:
|
||||
{
|
||||
/* There was no data (probably due to a truncated file) */
|
||||
/* so we don't know about type either */
|
||||
GST_ELEMENT_ERROR (demux, STREAM, TYPE_NOT_FOUND, ("No data in file"),
|
||||
(NULL));
|
||||
ret = GST_FLOW_ERROR;
|
||||
goto pause;
|
||||
}
|
||||
no_caps:
|
||||
{
|
||||
GST_ELEMENT_ERROR (demux, STREAM, TYPE_NOT_FOUND,
|
||||
("Could not detect type of contents"), (NULL));
|
||||
ret = GST_FLOW_ERROR;
|
||||
goto pause;
|
||||
}
|
||||
pause:
|
||||
{
|
||||
const gchar *reason = gst_flow_get_name (ret);
|
||||
gboolean push_eos = FALSE;
|
||||
|
||||
GST_LOG_OBJECT (demux, "pausing task, reason %s", reason);
|
||||
gst_pad_pause_task (demux->priv->sinkpad);
|
||||
|
||||
if (ret == GST_FLOW_EOS) {
|
||||
/* perform EOS logic */
|
||||
|
||||
if (demux->priv->segment.flags & GST_SEEK_FLAG_SEGMENT) {
|
||||
gint64 stop;
|
||||
|
||||
/* for segment playback we need to post when (in stream time)
|
||||
* we stopped, this is either stop (when set) or the duration. */
|
||||
if ((stop = demux->priv->segment.stop) == -1)
|
||||
stop = demux->priv->offset;
|
||||
|
||||
GST_LOG_OBJECT (demux, "Sending segment done, at end of segment");
|
||||
gst_element_post_message (GST_ELEMENT_CAST (demux),
|
||||
gst_message_new_segment_done (GST_OBJECT_CAST (demux),
|
||||
GST_FORMAT_BYTES, stop));
|
||||
} else {
|
||||
push_eos = TRUE;
|
||||
}
|
||||
} else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) {
|
||||
/* for fatal errors we post an error message */
|
||||
GST_ELEMENT_ERROR (demux, STREAM, FAILED, (NULL),
|
||||
("Stream stopped, reason %s", reason));
|
||||
push_eos = TRUE;
|
||||
}
|
||||
if (push_eos) {
|
||||
/* send EOS, and prevent hanging if no streams yet */
|
||||
GST_LOG_OBJECT (demux, "Sending EOS, at end of stream");
|
||||
gst_pad_push_event (demux->priv->srcpad, gst_event_new_eos ());
|
||||
}
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
static gboolean
|
||||
gst_tag_demux_sink_activate_mode (GstPad * pad, GstObject * parent,
|
||||
GstPadMode mode, gboolean active)
|
||||
{
|
||||
gboolean res;
|
||||
|
||||
switch (mode) {
|
||||
case GST_PAD_MODE_PULL:
|
||||
if (active)
|
||||
res = TRUE;
|
||||
else
|
||||
res = gst_pad_stop_task (pad);
|
||||
break;
|
||||
default:
|
||||
res = TRUE;
|
||||
break;
|
||||
}
|
||||
return res;
|
||||
}
|
||||
|
||||
static gboolean
|
||||
gst_tag_demux_sink_activate (GstPad * sinkpad, GstObject * parent)
|
||||
{
|
||||
GstTagDemux *demux;
|
||||
GstQuery *query;
|
||||
gboolean pull_mode;
|
||||
|
||||
demux = GST_TAG_DEMUX (parent);
|
||||
klass = GST_TAG_DEMUX_CLASS (G_OBJECT_GET_CLASS (demux));
|
||||
|
||||
/* 1: */
|
||||
/* If we can activate pull_range upstream, then read any end and start
|
||||
|
|
@ -1128,94 +1296,9 @@ gst_tag_demux_sink_activate (GstPad * sinkpad, GstObject * parent)
|
|||
if (!gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE))
|
||||
goto activate_push;
|
||||
|
||||
/* Look for tags at start and end of file */
|
||||
GST_DEBUG_OBJECT (demux, "Activated pull mode. Looking for tags");
|
||||
if (!gst_tag_demux_get_upstream_size (demux))
|
||||
return FALSE;
|
||||
|
||||
demux->priv->strip_start = 0;
|
||||
demux->priv->strip_end = 0;
|
||||
|
||||
s_tag_ok = gst_tag_demux_pull_start_tag (demux, &start_tags);
|
||||
e_tag_ok = gst_tag_demux_pull_end_tag (demux, &end_tags);
|
||||
|
||||
if (klass->merge_tags != NULL) {
|
||||
demux->priv->parsed_tags = klass->merge_tags (demux, start_tags, end_tags);
|
||||
} else {
|
||||
/* we merge in REPLACE mode, so put the less important tags first, which
|
||||
* we'll just assume is the end tag (subclasses may change this behaviour
|
||||
* or make it configurable by overriding the merge_tags vfunc) */
|
||||
demux->priv->parsed_tags =
|
||||
gst_tag_list_merge (end_tags, start_tags, GST_TAG_MERGE_REPLACE);
|
||||
}
|
||||
|
||||
if (start_tags)
|
||||
gst_tag_list_free (start_tags);
|
||||
if (end_tags)
|
||||
gst_tag_list_free (end_tags);
|
||||
|
||||
if (!e_tag_ok && !s_tag_ok)
|
||||
return FALSE;
|
||||
|
||||
if (demux->priv->parsed_tags != NULL) {
|
||||
demux->priv->send_tag_event = TRUE;
|
||||
}
|
||||
|
||||
if (demux->priv->upstream_size <=
|
||||
demux->priv->strip_start + demux->priv->strip_end) {
|
||||
/* There was no data (probably due to a truncated file) */
|
||||
GST_DEBUG_OBJECT (demux, "No data in file");
|
||||
/* so we don't know about type either */
|
||||
GST_ELEMENT_ERROR (demux, STREAM, TYPE_NOT_FOUND, (NULL), (NULL));
|
||||
goto done_activate;
|
||||
}
|
||||
|
||||
/* 3 - Do typefinding on data */
|
||||
caps = gst_type_find_helper_get_range (GST_OBJECT (demux), NULL,
|
||||
(GstTypeFindHelperGetRangeFunction) gst_tag_demux_read_range,
|
||||
demux->priv->upstream_size
|
||||
- (demux->priv->strip_start + demux->priv->strip_end), NULL,
|
||||
&probability);
|
||||
|
||||
GST_DEBUG_OBJECT (demux, "Found type %" GST_PTR_FORMAT " with a "
|
||||
"probability of %u", caps, probability);
|
||||
|
||||
/* 4 - Deactivate pull mode */
|
||||
if (!gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, FALSE)) {
|
||||
if (caps)
|
||||
gst_caps_unref (caps);
|
||||
GST_DEBUG_OBJECT (demux, "Could not deactivate sinkpad after reading tags");
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
/* 5 - If we didn't find the caps, fail */
|
||||
if (caps == NULL) {
|
||||
GST_DEBUG_OBJECT (demux, "Could not detect type of contents");
|
||||
GST_ELEMENT_ERROR (demux, STREAM, TYPE_NOT_FOUND, (NULL), (NULL));
|
||||
goto done_activate;
|
||||
}
|
||||
|
||||
/* tag reading and typefinding were already done, don't do them again in
|
||||
* the chain function if we end up in push mode */
|
||||
demux->priv->state = GST_TAG_DEMUX_STREAMING;
|
||||
|
||||
/* 6 Set the srcpad caps now we know them */
|
||||
gst_tag_demux_set_src_caps (demux, caps);
|
||||
|
||||
/* 7 - if the sinkpad is active, it was done by downstream so we're
|
||||
* done, otherwise switch to push */
|
||||
ret = TRUE;
|
||||
if (!gst_pad_is_active (sinkpad)) {
|
||||
ret = gst_pad_activate_mode (demux->priv->srcpad, GST_PAD_MODE_PUSH, TRUE);
|
||||
ret &= gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
|
||||
}
|
||||
|
||||
done_activate:
|
||||
|
||||
if (caps)
|
||||
gst_caps_unref (caps);
|
||||
|
||||
return ret;
|
||||
/* only start our task if we ourselves decide to start in pull mode */
|
||||
return gst_pad_start_task (sinkpad,
|
||||
(GstTaskFunction) gst_tag_demux_element_loop, demux);
|
||||
|
||||
activate_push:
|
||||
{
|
||||
|
|
@ -1230,14 +1313,18 @@ static gboolean
|
|||
gst_tag_demux_src_activate_mode (GstPad * pad, GstObject * parent,
|
||||
GstPadMode mode, gboolean active)
|
||||
{
|
||||
gboolean res = TRUE;
|
||||
gboolean res;
|
||||
GstTagDemux *demux = GST_TAG_DEMUX (parent);
|
||||
|
||||
switch (mode) {
|
||||
case GST_PAD_MODE_PULL:
|
||||
/* make sure our task stops pushing, we can't call _stop here
|
||||
* because this activation might happen from the streaming thread. */
|
||||
gst_pad_pause_task (demux->priv->sinkpad);
|
||||
res = gst_pad_activate_mode (demux->priv->sinkpad, mode, active);
|
||||
break;
|
||||
default:
|
||||
res = TRUE;
|
||||
break;
|
||||
}
|
||||
return res;
|
||||
|
|
@ -1392,8 +1479,7 @@ gst_tag_demux_send_pending_events (GstTagDemux * demux)
|
|||
while (events != NULL) {
|
||||
GST_DEBUG_OBJECT (demux->priv->srcpad, "sending cached %s event: %"
|
||||
GST_PTR_FORMAT, GST_EVENT_TYPE_NAME (events->data), events->data);
|
||||
gst_pad_event_default (demux->priv->sinkpad, GST_OBJECT (demux),
|
||||
GST_EVENT (events->data));
|
||||
gst_pad_push_event (demux->priv->srcpad, GST_EVENT (events->data));
|
||||
events = g_list_delete_link (events, events);
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue