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playbin2: API: Add {audio,video,text}-tags-changed signals

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Fixes bug #584686.
This commit is contained in:
Sebastian Dröge 2009-06-04 08:57:24 +02:00
parent 20fb58be19
commit 28b366db00
1 changed files with 122 additions and 0 deletions
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122
gst/playback/gstplaybin2.c
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@ -396,6 +396,11 @@ struct _GstPlayBinClass
void (*audio_changed) (GstPlayBin * playbin);
void (*text_changed) (GstPlayBin * playbin);
/* notify app that the tags of audio/video/text streams changed */
void (*video_tags_changed) (GstPlayBin * playbin, gint stream);
void (*audio_tags_changed) (GstPlayBin * playbin, gint stream);
void (*text_tags_changed) (GstPlayBin * playbin, gint stream);
/* get audio/video/text tags for a stream */
GstTagList *(*get_video_tags) (GstPlayBin * playbin, gint stream);
GstTagList *(*get_audio_tags) (GstPlayBin * playbin, gint stream);
@ -473,6 +478,9 @@ enum
SIGNAL_VIDEO_CHANGED,
SIGNAL_AUDIO_CHANGED,
SIGNAL_TEXT_CHANGED,
SIGNAL_VIDEO_TAGS_CHANGED,
SIGNAL_AUDIO_TAGS_CHANGED,
SIGNAL_TEXT_TAGS_CHANGED,
SIGNAL_GET_VIDEO_TAGS,
SIGNAL_GET_AUDIO_TAGS,
SIGNAL_GET_TEXT_TAGS,
@ -816,6 +824,54 @@ gst_play_bin_class_init (GstPlayBinClass * klass)
G_STRUCT_OFFSET (GstPlayBinClass, text_changed), NULL, NULL,
gst_marshal_VOID__VOID, G_TYPE_NONE, 0, G_TYPE_NONE);
/**
* GstPlayBin2::video-tags-changed
* @playbin: a #GstPlayBin2
* @stream: stream index with changed tags
*
* This signal is emitted whenever the tags of a video stream have changed.
* The application will most likely want to get the new tags.
*
* Since: 0.10.24
*/
gst_play_bin_signals[SIGNAL_VIDEO_TAGS_CHANGED] =
g_signal_new ("video-tags-changed", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstPlayBinClass, video_tags_changed), NULL, NULL,
gst_marshal_VOID__INT, G_TYPE_NONE, 1, G_TYPE_INT);
/**
* GstPlayBin2::audio-tags-changed
* @playbin: a #GstPlayBin2
* @stream: stream index with changed tags
*
* This signal is emitted whenever the tags of an audio stream have changed.
* The application will most likely want to get the new tags.
*
* Since: 0.10.24
*/
gst_play_bin_signals[SIGNAL_AUDIO_TAGS_CHANGED] =
g_signal_new ("audio-tags-changed", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstPlayBinClass, audio_tags_changed), NULL, NULL,
gst_marshal_VOID__INT, G_TYPE_NONE, 1, G_TYPE_INT);
/**
* GstPlayBin2::text-tags-changed
* @playbin: a #GstPlayBin2
* @stream: stream index with changed tags
*
* This signal is emitted whenever the tags of a text stream have changed.
* The application will most likely want to get the new tags.
*
* Since: 0.10.24
*/
gst_play_bin_signals[SIGNAL_TEXT_TAGS_CHANGED] =
g_signal_new ("text-tags-changed", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstPlayBinClass, text_tags_changed), NULL, NULL,
gst_marshal_VOID__INT, G_TYPE_NONE, 1, G_TYPE_INT);
/**
* GstPlayBin2::get-video-tags
* @playbin: a #GstPlayBin2
@ -1802,6 +1858,45 @@ array_has_value (const gchar * values[], const gchar * value)
return FALSE;
}
typedef struct
{
GstPlayBin *playbin;
gint stream_id;
GstPlaySinkType type;
} NotifyTagsData;
static void
notify_tags_cb (GObject * object, GParamSpec * pspec, gpointer user_data)
{
NotifyTagsData *ntdata = (NotifyTagsData *) user_data;
gint signal;
GST_DEBUG_OBJECT (ntdata->playbin, "Tags on pad %" GST_PTR_FORMAT
" with stream id %d and type %d have changed",
object, ntdata->stream_id, ntdata->type);
switch (ntdata->type) {
case GST_PLAY_SINK_TYPE_VIDEO:
case GST_PLAY_SINK_TYPE_VIDEO_RAW:
signal = SIGNAL_VIDEO_TAGS_CHANGED;
break;
case GST_PLAY_SINK_TYPE_AUDIO:
case GST_PLAY_SINK_TYPE_AUDIO_RAW:
signal = SIGNAL_AUDIO_TAGS_CHANGED;
break;
case GST_PLAY_SINK_TYPE_TEXT:
signal = SIGNAL_TEXT_TAGS_CHANGED;
break;
default:
signal = -1;
break;
}
if (signal >= 0)
g_signal_emit (G_OBJECT (ntdata->playbin), gst_play_bin_signals[signal], 0,
ntdata->stream_id);
}
/* this function is called when a new pad is added to decodebin. We check the
* type of the pad and add it to the selector element of the group.
*/
@ -1882,12 +1977,30 @@ pad_added_cb (GstElement * decodebin, GstPad * pad, GstSourceGroup * group)
/* get sinkpad for the new stream */
if (select->selector) {
if ((sinkpad = gst_element_get_request_pad (select->selector, "sink%d"))) {
gulong notify_tags_handler = 0;
NotifyTagsData *ntdata;
GST_DEBUG_OBJECT (playbin, "got pad %s:%s from selector",
GST_DEBUG_PAD_NAME (sinkpad));
/* store the selector for the pad */
g_object_set_data (G_OBJECT (sinkpad), "playbin2.select", select);
/* connect to the notify::tags signal for our
* own *-tags-changed signals
*/
ntdata = g_new0 (NotifyTagsData, 1);
ntdata->playbin = playbin;
ntdata->stream_id = select->channels->len;
ntdata->type = select->type;
notify_tags_handler =
g_signal_connect_data (G_OBJECT (sinkpad), "notify::tags",
G_CALLBACK (notify_tags_cb), ntdata, (GClosureNotify) g_free,
(GConnectFlags) 0);
g_object_set_data (G_OBJECT (sinkpad), "playbin2.notify_tags_handler",
(gpointer) notify_tags_handler);
/* store the pad in the array */
GST_DEBUG_OBJECT (playbin, "pad %p added to array", sinkpad);
g_ptr_array_add (select->channels, sinkpad);
@ -1980,6 +2093,15 @@ pad_removed_cb (GstElement * decodebin, GstPad * pad, GstSourceGroup * group)
goto not_linked;
if ((select = g_object_get_data (G_OBJECT (peer), "playbin2.select"))) {
gulong notify_tags_handler;
notify_tags_handler =
(gulong) g_object_get_data (G_OBJECT (peer),
"playbin2.notify_tags_handler");
if (notify_tags_handler != 0)
g_signal_handler_disconnect (G_OBJECT (peer), notify_tags_handler);
g_object_set_data (G_OBJECT (peer), "playbin2.notify_tags_handler", NULL);
/* remove the pad from the array */
g_ptr_array_remove (select->channels, peer);
GST_DEBUG_OBJECT (playbin, "pad %p removed from array", peer);