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gstreamer/gst/playback/gstplaybin.c
Tim-Philipp Müller 85f189aee5 Make switching off of subtitles work. To avoid all kind of problems with unlinking of the subtitle input, we just kee... 
Original commit message from CVS:
* ext/pango/gsttextoverlay.c: (gst_text_overlay_class_init):
* gst/playback/gstplaybasebin.c: (set_subtitles_visible),
(set_active_source):
* gst/playback/gstplaybasebin.h:
* gst/playback/gstplaybin.c: (gst_play_bin_class_init),
(setup_sinks), (playbin_set_subtitles_visible):
Make switching off of subtitles work. To avoid all kind of
problems with unlinking of the subtitle input, we just keep
the subtitle inputs linked as they are and tell textoverlay
not to render them. Fixes #373011.
Other subtitle switching issues (esp. when there are both
external and in-stream subtitles) remain. They'll be solved
in playbin2.
2007-12-20 10:41:29 +00:00

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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:element-playbin
*
* <refsect2>
* <para>
* Playbin provides a stand-alone everything-in-one abstraction for an
* audio and/or video player.
* </para>
* <para>
* It can handle both audio and video files and features
* <itemizedlist>
* <listitem>
* automatic file type recognition and based on that automatic
* selection and usage of the right audio/video/subtitle demuxers/decoders
* </listitem>
* <listitem>
* visualisations for audio files
* </listitem>
* <listitem>
* subtitle support for video files
* </listitem>
* <listitem>
* stream selection between different audio/subtitles streams
* </listitem>
* <listitem>
* meta info (tag) extraction
* </listitem>
* <listitem>
* easy access to the last video frame
* </listitem>
* <listitem>
* buffering when playing streams over a network
* </listitem>
* <listitem>
* volume control
* </listitem>
* </itemizedlist>
* </para>
* <title>Usage</title>
* <para>
* A playbin element can be created just like any other element using
* gst_element_factory_make(). The file/URI to play should be set via the "uri"
* property. This must be an absolute URI, relative file paths are not allowed.
* Example URIs are file:///home/joe/movie.avi or http://www.joedoe.com/foo.ogg
* </para>
* <para>
* Playbin is a #GstPipeline. It will notify the application of everything
* that's happening (errors, end of stream, tags found, state changes, etc.)
* by posting messages on its #GstBus. The application needs to watch the
* bus.
* </para>
* <para>
* Playback can be initiated by setting the element to PLAYING state using
* gst_element_set_state(). Note that the state change will take place in
* the background in a separate thread, when the function returns playback
* is probably not happening yet and any errors might not have occured yet.
* Applications using playbin should ideally be written to deal with things
* completely asynchroneous.
* </para>
* <para>
* When playback has finished (an EOS message has been received on the bus)
* or an error has occured (an ERROR message has been received on the bus) or
* the user wants to play a different track, playbin should be set back to
* READY or NULL state, then the "uri" property should be set to the new
* location and then playbin be set to PLAYING state again.
* </para>
* <para>
* Seeking can be done using gst_element_seek_simple() or gst_element_seek()
* on the playbin element. Again, the seek will not be executed
* instantaneously, but will be done in a background thread. When the seek
* call returns the seek will most likely still be in process. An application
* may wait for the seek to finish (or fail) using gst_element_get_state() with
* -1 as the timeout, but this will block the user interface and is not
* recommended at all.
* </para>
* <para>
* Applications may query the current position and duration of the stream
* via gst_element_query_position() and gst_element_query_duration() and
* setting the format passed to GST_FORMAT_TIME. If the query was successful,
* the duration or position will have been returned in units of nanoseconds.
* </para>
* <title>Advanced Usage: specifying the audio and video sink</title>
* <para>
* By default, if no audio sink or video sink has been specified via the
* "audio-sink" or "video-sink" property, playbin will use the autoaudiosink
* and autovideosink elements to find the first-best available output method.
* This should work in most cases, but is not always desirable. Often either
* the user or application might want to specify more explicitly what to use
* for audio and video output.
* </para>
* <para>
* If the application wants more control over how audio or video should be
* output, it may create the audio/video sink elements itself (for example
* using gst_element_factory_make()) and provide them to playbin using the
* "audio-sink" or "video-sink" property.
* </para>
* <para>
* GNOME-based applications, for example, will usually want to create
* gconfaudiosink and gconfvideosink elements and make playbin use those,
* so that output happens to whatever the user has configured in the GNOME
* Multimedia System Selector confinguration dialog.
* </para>
* <para>
* The sink elements do not necessarily need to be ready-made sinks. It is
* possible to create container elements that look like a sink to playbin,
* but in reality contain a number of custom elements linked together. This
* can be achieved by creating a #GstBin and putting elements in there and
* linking them, and then creating a sink #GstGhostPad for the bin and pointing
* it to the sink pad of the first element within the bin. This can be used
* for a number of purposes, for example to force output to a particular
* format or to modify or observe the data before it is output.
* </para>
* <para>
* It is also possible to 'suppress' audio and/or video output by using
* 'fakesink' elements (or capture it from there using the fakesink element's
* "handoff" signal, which, nota bene, is fired from the streaming thread!).
* </para>
* <title>Retrieving Tags and Other Meta Data</title>
* <para>
* Most of the common meta data (artist, title, etc.) can be retrieved by
* watching for TAG messages on the pipeline's bus (see above).
* </para>
* <para>
* Other more specific meta information like width/height/framerate of video
* streams or samplerate/number of channels of audio streams can be obtained
* using the "stream-info" property, which will return a GList of stream info
* objects, one for each stream. These are opaque objects that can only be
* accessed via the standard GObject property interface, ie. g_object_get().
* Each stream info object has the following properties:
* <itemizedlist>
* <listitem>"object" (GstObject) (the decoder source pad usually)</listitem>
* <listitem>"type" (enum) (if this is an audio/video/subtitle stream)</listitem>
* <listitem>"decoder" (string) (name of decoder used to decode this stream)</listitem>
* <listitem>"mute" (boolean) (to mute or unmute this stream)</listitem>
* <listitem>"caps" (GstCaps) (caps of the decoded stream)</listitem>
* <listitem>"language-code" (string) (ISO-639 language code for this stream, mostly used for audio/subtitle streams)</listitem>
* <listitem>"codec" (string) (format this stream was encoded in)</listitem>
* </itemizedlist>
* Stream information from the stream-info properties is best queried once
* playbin has changed into PAUSED or PLAYING state (which can be detected
* via a state-changed message on the bus where old_state=READY and
* new_state=PAUSED), since before that the list might not be complete yet or
* not contain all available information (like language-codes).
* </para>
* <title>Buffering</title>
* <para>
* Playbin handles buffering automatically for the most part, but applications
* need to handle parts of the buffering process as well. Whenever playbin is
* buffering, it will post BUFFERING messages on the bus with a percentage
* value that shows the progress of the buffering process. Applications need
* to set playbin to PLAYING or PAUSED state in response to these messages.
* They may also want to convey the buffering progress to the user in some
* way. Here is how to extract the percentage information from the message
* (requires GStreamer >= 0.10.11):
* </para>
* <para>
* <programlisting>
* switch (GST_MESSAGE_TYPE (msg)) {
* case GST_MESSAGE_BUFFERING: {
* gint percent = 0;
* gst_message_parse_buffering (msg, &amp;percent);
* g_print ("Buffering (%%u percent done)", percent);
* break;
* }
* ...
* }
* </programlisting>
* Note that applications should keep/set the pipeline in the PAUSED state when
* a BUFFERING message is received with a buffer percent value < 100 and set
* the pipeline back to PLAYING state when a BUFFERING message with a value
* of 100 percent is received (if PLAYING is the desired state, that is).
* </para>
* <title>Embedding the video window in your application</title>
* <para>
* By default, playbin (or rather the video sinks used) will create their own
* window. Applications will usually want to force output to a window of their
* own, however. This can be done using the GstXOverlay interface, which most
* video sinks implement. See the documentation there for more details.
* </para>
* <title>Specifying which CD/DVD device to use</title>
* <para>
* The device to use for CDs/DVDs needs to be set on the source element
* playbin creates before it is opened. The only way to do this at the moment
* is to connect to playbin's "notify::source" signal, which will be emitted
* by playbin when it has created the source element for a particular URI.
* In the signal callback you can check if the source element has a "device"
* property and set it appropriately. In future ways might be added to specify
* the device as part of the URI, but at the time of writing this is not
* possible yet.
* </para>
* <title>Examples</title>
* <para>
* Here is a simple pipeline to play back a video or audio file:
* <programlisting>
* gst-launch -v playbin uri=file:///path/to/somefile.avi
* </programlisting>
* This will play back the given AVI video file, given that the video and
* audio decoders required to decode the content are installed. Since no
* special audio sink or video sink is supplied (not possible via gst-launch),
* playbin will try to find a suitable audio and video sink automatically
* using the autoaudiosink and autovideosink elements.
* </para>
* <para>
* Here is a another pipeline to play track 4 of an audio CD:
* <programlisting>
* gst-launch -v playbin uri=cdda://4
* </programlisting>
* This will play back track 4 on an audio CD in your disc drive (assuming
* the drive is detected automatically by the plugin).
* </para>
* <para>
* Here is a another pipeline to play title 1 of a DVD:
* <programlisting>
* gst-launch -v playbin uri=dvd://1
* </programlisting>
* This will play back title 1 of a DVD in your disc drive (assuming
* the drive is detected automatically by the plugin).
* </para>
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <gst/gst.h>
#include <gst/gst-i18n-plugin.h>
#include <gst/pbutils/pbutils.h>
#include "gstplaybasebin.h"
GST_DEBUG_CATEGORY_STATIC (gst_play_bin_debug);
#define GST_CAT_DEFAULT gst_play_bin_debug
#define GST_TYPE_PLAY_BIN (gst_play_bin_get_type())
#define GST_PLAY_BIN(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_PLAY_BIN,GstPlayBin))
#define GST_PLAY_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_PLAY_BIN,GstPlayBinClass))
#define GST_IS_PLAY_BIN(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_PLAY_BIN))
#define GST_IS_PLAY_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_PLAY_BIN))
#define VOLUME_MAX_DOUBLE 10.0
typedef struct _GstPlayBin GstPlayBin;
typedef struct _GstPlayBinClass GstPlayBinClass;
struct _GstPlayBin
{
GstPlayBaseBin parent;
/* the configurable elements */
GstElement *fakesink;
GstElement *audio_sink;
GstElement *video_sink;
GstElement *visualisation;
GstElement *pending_visualisation;
GstElement *volume_element;
GstElement *textoverlay_element;
gfloat volume;
/* these are the currently active sinks */
GList *sinks;
/* the last captured frame for snapshots */
GstBuffer *frame;
/* our cache for the sinks */
GHashTable *cache;
/* font description */
gchar *font_desc;
/* indication if the pipeline is live */
gboolean is_live;
};
struct _GstPlayBinClass
{
GstPlayBaseBinClass parent_class;
};
/* props */
enum
{
ARG_0,
ARG_AUDIO_SINK,
ARG_VIDEO_SINK,
ARG_VIS_PLUGIN,
ARG_VOLUME,
ARG_FRAME,
ARG_FONT_DESC
};
/* signals */
enum
{
LAST_SIGNAL
};
static void gst_play_bin_class_init (GstPlayBinClass * klass);
static void gst_play_bin_init (GstPlayBin * play_bin);
static void gst_play_bin_dispose (GObject * object);
static gboolean setup_sinks (GstPlayBaseBin * play_base_bin,
GstPlayBaseGroup * group);
static void remove_sinks (GstPlayBin * play_bin);
static void playbin_set_subtitles_visible (GstPlayBaseBin * play_base_bin,
gboolean visible);
static void gst_play_bin_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * spec);
static void gst_play_bin_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * spec);
static gboolean gst_play_bin_send_event (GstElement * element,
GstEvent * event);
static GstStateChangeReturn gst_play_bin_change_state (GstElement * element,
GstStateChange transition);
static void gst_play_bin_handle_message (GstBin * bin, GstMessage * message);
static GstElementClass *parent_class;
//static guint gst_play_bin_signals[LAST_SIGNAL] = { 0 };
static const GstElementDetails gst_play_bin_details =
GST_ELEMENT_DETAILS ("Player Bin",
"Generic/Bin/Player",
"Autoplug and play media from an uri",
"Wim Taymans <wim.taymans@gmail.com>");
static GType
gst_play_bin_get_type (void)
{
static GType gst_play_bin_type = 0;
if (!gst_play_bin_type) {
static const GTypeInfo gst_play_bin_info = {
sizeof (GstPlayBinClass),
NULL,
NULL,
(GClassInitFunc) gst_play_bin_class_init,
NULL,
NULL,
sizeof (GstPlayBin),
0,
(GInstanceInitFunc) gst_play_bin_init,
NULL
};
gst_play_bin_type = g_type_register_static (GST_TYPE_PLAY_BASE_BIN,
"GstPlayBin", &gst_play_bin_info, 0);
}
return gst_play_bin_type;
}
static void
gst_play_bin_class_init (GstPlayBinClass * klass)
{
GObjectClass *gobject_klass;
GstElementClass *gstelement_klass;
GstBinClass *gstbin_klass;
GstPlayBaseBinClass *playbasebin_klass;
gobject_klass = (GObjectClass *) klass;
gstelement_klass = (GstElementClass *) klass;
gstbin_klass = (GstBinClass *) klass;
playbasebin_klass = (GstPlayBaseBinClass *) klass;
parent_class = g_type_class_peek_parent (klass);
gobject_klass->set_property = gst_play_bin_set_property;
gobject_klass->get_property = gst_play_bin_get_property;
g_object_class_install_property (gobject_klass, ARG_VIDEO_SINK,
g_param_spec_object ("video-sink", "Video Sink",
"the video output element to use (NULL = default sink)",
GST_TYPE_ELEMENT, G_PARAM_READWRITE));
g_object_class_install_property (gobject_klass, ARG_AUDIO_SINK,
g_param_spec_object ("audio-sink", "Audio Sink",
"the audio output element to use (NULL = default sink)",
GST_TYPE_ELEMENT, G_PARAM_READWRITE));
g_object_class_install_property (gobject_klass, ARG_VIS_PLUGIN,
g_param_spec_object ("vis-plugin", "Vis plugin",
"the visualization element to use (NULL = none)",
GST_TYPE_ELEMENT, G_PARAM_READWRITE));
g_object_class_install_property (gobject_klass, ARG_VOLUME,
g_param_spec_double ("volume", "volume", "volume",
0.0, VOLUME_MAX_DOUBLE, 1.0, G_PARAM_READWRITE));
g_object_class_install_property (gobject_klass, ARG_FRAME,
gst_param_spec_mini_object ("frame", "Frame",
"The last frame (NULL = no video available)",
GST_TYPE_BUFFER, G_PARAM_READABLE));
g_object_class_install_property (gobject_klass, ARG_FONT_DESC,
g_param_spec_string ("subtitle-font-desc",
"Subtitle font description",
"Pango font description of font "
"to be used for subtitle rendering", NULL, G_PARAM_WRITABLE));
gobject_klass->dispose = GST_DEBUG_FUNCPTR (gst_play_bin_dispose);
gst_element_class_set_details (gstelement_klass, &gst_play_bin_details);
gstelement_klass->change_state =
GST_DEBUG_FUNCPTR (gst_play_bin_change_state);
gstelement_klass->send_event = GST_DEBUG_FUNCPTR (gst_play_bin_send_event);
gstbin_klass->handle_message =
GST_DEBUG_FUNCPTR (gst_play_bin_handle_message);
playbasebin_klass->setup_output_pads = setup_sinks;
playbasebin_klass->set_subtitles_visible = playbin_set_subtitles_visible;
}
static void
gst_play_bin_init (GstPlayBin * play_bin)
{
play_bin->video_sink = NULL;
play_bin->audio_sink = NULL;
play_bin->visualisation = NULL;
play_bin->pending_visualisation = NULL;
play_bin->volume_element = NULL;
play_bin->textoverlay_element = NULL;
play_bin->volume = 1.0;
play_bin->sinks = NULL;
play_bin->frame = NULL;
play_bin->font_desc = NULL;
play_bin->cache = g_hash_table_new_full (g_str_hash, g_str_equal,
NULL, (GDestroyNotify) gst_object_unref);
}
static void
gst_play_bin_dispose (GObject * object)
{
GstPlayBin *play_bin;
play_bin = GST_PLAY_BIN (object);
if (play_bin->cache != NULL) {
remove_sinks (play_bin);
g_hash_table_destroy (play_bin->cache);
play_bin->cache = NULL;
}
if (play_bin->audio_sink != NULL) {
gst_element_set_state (play_bin->audio_sink, GST_STATE_NULL);
gst_object_unref (play_bin->audio_sink);
play_bin->audio_sink = NULL;
}
if (play_bin->video_sink != NULL) {
gst_element_set_state (play_bin->video_sink, GST_STATE_NULL);
gst_object_unref (play_bin->video_sink);
play_bin->video_sink = NULL;
}
if (play_bin->visualisation != NULL) {
gst_element_set_state (play_bin->visualisation, GST_STATE_NULL);
gst_object_unref (play_bin->visualisation);
play_bin->visualisation = NULL;
}
if (play_bin->pending_visualisation != NULL) {
gst_element_set_state (play_bin->pending_visualisation, GST_STATE_NULL);
gst_object_unref (play_bin->pending_visualisation);
play_bin->pending_visualisation = NULL;
}
if (play_bin->textoverlay_element != NULL) {
gst_object_unref (play_bin->textoverlay_element);
play_bin->textoverlay_element = NULL;
}
g_free (play_bin->font_desc);
play_bin->font_desc = NULL;
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_play_bin_vis_unblocked (GstPad * tee_pad, gboolean blocked,
gpointer user_data)
{
GstPlayBin *play_bin = GST_PLAY_BIN (user_data);
if (play_bin->pending_visualisation)
gst_pad_set_blocked_async (tee_pad, FALSE, gst_play_bin_vis_unblocked,
play_bin);
}
static void
gst_play_bin_vis_blocked (GstPad * tee_pad, gboolean blocked,
gpointer user_data)
{
GstPlayBin *play_bin = GST_PLAY_BIN (user_data);
GstBin *vis_bin = NULL;
GstPad *vis_sink_pad = NULL, *vis_src_pad = NULL, *vqueue_pad = NULL;
GstState bin_state;
GstElement *pending_visualisation;
GST_OBJECT_LOCK (play_bin);
pending_visualisation = play_bin->pending_visualisation;
play_bin->pending_visualisation = NULL;
GST_OBJECT_UNLOCK (play_bin);
/* We want to disable visualisation */
if (!GST_IS_ELEMENT (pending_visualisation)) {
/* Set visualisation element to READY */
gst_element_set_state (play_bin->visualisation, GST_STATE_READY);
goto beach;
}
vis_bin =
GST_BIN_CAST (gst_object_get_parent (GST_OBJECT_CAST (play_bin->
visualisation)));
if (!GST_IS_BIN (vis_bin) || !GST_IS_PAD (tee_pad)) {
goto beach;
}
vis_src_pad = gst_element_get_pad (play_bin->visualisation, "src");
vis_sink_pad = gst_pad_get_peer (tee_pad);
/* Can be fakesink */
if (GST_IS_PAD (vis_src_pad)) {
vqueue_pad = gst_pad_get_peer (vis_src_pad);
}
if (!GST_IS_PAD (vis_sink_pad)) {
goto beach;
}
/* Check the bin's state */
GST_OBJECT_LOCK (vis_bin);
bin_state = GST_STATE (vis_bin);
GST_OBJECT_UNLOCK (vis_bin);
/* Unlink */
gst_pad_unlink (tee_pad, vis_sink_pad);
gst_object_unref (vis_sink_pad);
vis_sink_pad = NULL;
if (GST_IS_PAD (vqueue_pad)) {
gst_pad_unlink (vis_src_pad, vqueue_pad);
gst_object_unref (vis_src_pad);
vis_src_pad = NULL;
}
/* Remove from vis_bin */
gst_bin_remove (vis_bin, play_bin->visualisation);
/* Set state to NULL */
gst_element_set_state (play_bin->visualisation, GST_STATE_NULL);
/* And loose our ref */
gst_object_unref (play_bin->visualisation);
if (pending_visualisation) {
/* Ref this new visualisation element before adding to the bin */
gst_object_ref (pending_visualisation);
/* Add the new one */
gst_bin_add (vis_bin, pending_visualisation);
/* Synchronizing state */
gst_element_set_state (pending_visualisation, bin_state);
vis_sink_pad = gst_element_get_pad (pending_visualisation, "sink");
vis_src_pad = gst_element_get_pad (pending_visualisation, "src");
if (!GST_IS_PAD (vis_sink_pad) || !GST_IS_PAD (vis_src_pad)) {
goto beach;
}
/* Link */
gst_pad_link (tee_pad, vis_sink_pad);
gst_pad_link (vis_src_pad, vqueue_pad);
}
/* We are done */
gst_object_unref (play_bin->visualisation);
play_bin->visualisation = pending_visualisation;
beach:
if (vis_sink_pad) {
gst_object_unref (vis_sink_pad);
}
if (vis_src_pad) {
gst_object_unref (vis_src_pad);
}
if (vqueue_pad) {
gst_object_unref (vqueue_pad);
}
if (vis_bin) {
gst_object_unref (vis_bin);
}
/* Unblock the pad */
gst_pad_set_blocked_async (tee_pad, FALSE, gst_play_bin_vis_unblocked,
play_bin);
}
static void
gst_play_bin_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstPlayBin *play_bin;
play_bin = GST_PLAY_BIN (object);
switch (prop_id) {
case ARG_VIDEO_SINK:
if (play_bin->video_sink != NULL) {
gst_object_unref (play_bin->video_sink);
}
play_bin->video_sink = g_value_get_object (value);
if (play_bin->video_sink != NULL) {
gst_object_ref (play_bin->video_sink);
gst_object_sink (GST_OBJECT_CAST (play_bin->video_sink));
}
/* when changing the videosink, we just remove the
* video pipeline from the cache so that it will be
* regenerated with the new sink element */
g_hash_table_remove (play_bin->cache, "vbin");
break;
case ARG_AUDIO_SINK:
if (play_bin->audio_sink != NULL) {
gst_object_unref (play_bin->audio_sink);
}
play_bin->audio_sink = g_value_get_object (value);
if (play_bin->audio_sink != NULL) {
gst_object_ref (play_bin->audio_sink);
gst_object_sink (GST_OBJECT_CAST (play_bin->audio_sink));
}
g_hash_table_remove (play_bin->cache, "abin");
break;
case ARG_VIS_PLUGIN:
{
GstElement *pending_visualisation =
GST_ELEMENT_CAST (g_value_get_object (value));
/* Take ownership */
if (pending_visualisation) {
gst_object_ref (pending_visualisation);
gst_object_sink (pending_visualisation);
}
/* Do we already have a visualisation change pending ? */
GST_OBJECT_LOCK (play_bin);
if (play_bin->pending_visualisation) {
gst_object_unref (play_bin->pending_visualisation);
play_bin->pending_visualisation = pending_visualisation;
GST_OBJECT_UNLOCK (play_bin);
} else {
GST_OBJECT_UNLOCK (play_bin);
/* Was there a visualisation already set ? */
if (play_bin->visualisation != NULL) {
GstBin *vis_bin = NULL;
vis_bin =
GST_BIN_CAST (gst_object_get_parent (GST_OBJECT_CAST (play_bin->
visualisation)));
/* Check if the visualisation is already in a bin */
if (GST_IS_BIN (vis_bin)) {
GstPad *vis_sink_pad = NULL, *tee_pad = NULL;
/* Now get tee pad and block it async */
vis_sink_pad = gst_element_get_pad (play_bin->visualisation,
"sink");
if (!GST_IS_PAD (vis_sink_pad)) {
goto beach;
}
tee_pad = gst_pad_get_peer (vis_sink_pad);
if (!GST_IS_PAD (tee_pad)) {
goto beach;
}
play_bin->pending_visualisation = pending_visualisation;
/* Block with callback */
gst_pad_set_blocked_async (tee_pad, TRUE, gst_play_bin_vis_blocked,
play_bin);
beach:
if (vis_sink_pad) {
gst_object_unref (vis_sink_pad);
}
if (tee_pad) {
gst_object_unref (tee_pad);
}
gst_object_unref (vis_bin);
} else {
play_bin->visualisation = pending_visualisation;
}
} else {
play_bin->visualisation = pending_visualisation;
}
}
break;
}
case ARG_VOLUME:
play_bin->volume = g_value_get_double (value);
if (play_bin->volume_element) {
g_object_set (G_OBJECT (play_bin->volume_element), "volume",
play_bin->volume, NULL);
}
break;
case ARG_FONT_DESC:
g_free (play_bin->font_desc);
play_bin->font_desc = g_strdup (g_value_get_string (value));
if (play_bin->textoverlay_element) {
g_object_set (G_OBJECT (play_bin->textoverlay_element),
"font-desc", g_value_get_string (value), NULL);
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_play_bin_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstPlayBin *play_bin;
play_bin = GST_PLAY_BIN (object);
switch (prop_id) {
case ARG_VIDEO_SINK:
g_value_set_object (value, play_bin->video_sink);
break;
case ARG_AUDIO_SINK:
g_value_set_object (value, play_bin->audio_sink);
break;
case ARG_VIS_PLUGIN:
g_value_set_object (value, play_bin->visualisation);
break;
case ARG_VOLUME:
g_value_set_double (value, play_bin->volume);
break;
case ARG_FRAME:{
GstBuffer *cur_frame = NULL;
gst_buffer_replace (&cur_frame, play_bin->frame);
gst_value_take_buffer (value, cur_frame);
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* signal fired when the identity has received a new buffer. This is used for
* making screenshots.
*/
static void
handoff (GstElement * identity, GstBuffer * frame, gpointer data)
{
GstPlayBin *play_bin = GST_PLAY_BIN (data);
/* applications need to know the buffer caps,
* make sure they are always set on the frame */
if (GST_BUFFER_CAPS (frame) == NULL) {
GstPad *pad;
if ((pad = gst_element_get_pad (identity, "sink"))) {
gst_buffer_set_caps (frame, GST_PAD_CAPS (pad));
gst_object_unref (pad);
}
}
gst_buffer_replace (&play_bin->frame, frame);
}
static void
post_missing_element_message (GstPlayBin * playbin, const gchar * name)
{
GstMessage *msg;
msg = gst_missing_element_message_new (GST_ELEMENT_CAST (playbin), name);
gst_element_post_message (GST_ELEMENT_CAST (playbin), msg);
}
/* make the element (bin) that contains the elements needed to perform
* video display. We connect a handoff signal to identity so that we
* can grab snapshots. Identity's sinkpad is ghosted to vbin.
*
* +-------------------------------------------------------------+
* | vbin |
* | +--------+ +----------+ +----------+ +---------+ |
* | |identity| |colorspace| |videoscale| |videosink| |
* | +-sink src-sink src-sink src-sink | |
* | | +---+----+ +----------+ +----------+ +---------+ |
* sink-+ | |
* +----------|--------------------------------------------------+
* handoff
*/
static GstElement *
gen_video_element (GstPlayBin * play_bin)
{
GstElement *element;
GstElement *conv;
GstElement *scale;
GstElement *sink;
GstElement *identity;
GstPad *pad;
/* first see if we have it in the cache */
element = g_hash_table_lookup (play_bin->cache, "vbin");
if (element != NULL) {
return element;
}
if (play_bin->video_sink) {
sink = play_bin->video_sink;
} else {
sink = gst_element_factory_make ("autovideosink", "videosink");
if (sink == NULL) {
sink = gst_element_factory_make ("xvimagesink", "videosink");
}
if (sink == NULL)
goto no_sinks;
}
gst_object_ref (sink);
g_hash_table_insert (play_bin->cache, "video_sink", sink);
/* create a bin to hold objects, as we create them we add them to this bin so
* that when something goes wrong we only need to unref the bin */
element = gst_bin_new ("vbin");
gst_bin_add (GST_BIN_CAST (element), sink);
conv = gst_element_factory_make ("ffmpegcolorspace", "vconv");
if (conv == NULL)
goto no_colorspace;
gst_bin_add (GST_BIN_CAST (element), conv);
scale = gst_element_factory_make ("videoscale", "vscale");
if (scale == NULL)
goto no_videoscale;
gst_bin_add (GST_BIN_CAST (element), scale);
identity = gst_element_factory_make ("identity", "id");
g_object_set (identity, "silent", TRUE, NULL);
g_signal_connect (identity, "handoff", G_CALLBACK (handoff), play_bin);
gst_bin_add (GST_BIN_CAST (element), identity);
gst_element_link_pads (identity, "src", conv, "sink");
gst_element_link_pads (conv, "src", scale, "sink");
/* be more careful with the pad from the custom sink element, it might not
* be named 'sink' */
if (!gst_element_link_pads (scale, "src", sink, NULL))
goto link_failed;
pad = gst_element_get_pad (identity, "sink");
gst_element_add_pad (element, gst_ghost_pad_new ("sink", pad));
gst_object_unref (pad);
gst_element_set_state (element, GST_STATE_READY);
/* since we're gonna add it to a bin but don't want to lose it,
* we keep a reference. */
gst_object_ref (element);
g_hash_table_insert (play_bin->cache, "vbin", element);
return element;
/* ERRORS */
no_sinks:
{
post_missing_element_message (play_bin, "autovideosink");
GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN,
(_("Both autovideosink and xvimagesink elements are missing.")),
(NULL));
return NULL;
}
no_colorspace:
{
post_missing_element_message (play_bin, "ffmpegcolorspace");
GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN,
(_("Missing element '%s' - check your GStreamer installation."),
"ffmpegcolorspace"), (NULL));
gst_object_unref (element);
return NULL;
}
no_videoscale:
{
post_missing_element_message (play_bin, "videoscale");
GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN,
(_("Missing element '%s' - check your GStreamer installation."),
"videoscale"), ("possibly a liboil version mismatch?"));
gst_object_unref (element);
return NULL;
}
link_failed:
{
GST_ELEMENT_ERROR (play_bin, CORE, PAD,
(NULL), ("Failed to configure the video sink."));
gst_object_unref (element);
return NULL;
}
}
/* make an element for playback of video with subtitles embedded.
*
* +--------------------------------------------------+
* | tbin +-------------+ |
* | +-----+ | textoverlay | +------+ |
* | | csp | +--video_sink | | vbin | |
* video_sink-sink src+ +-text_sink src-sink | |
* | +-----+ | +-------------+ +------+ |
* text_sink-------------+ |
* +--------------------------------------------------+
*
* If there is no subtitle renderer this function will simply return the
* videosink without the text_sink pad.
*/
static GstElement *
gen_text_element (GstPlayBin * play_bin)
{
GstElement *element, *csp, *overlay, *vbin;
GstPad *pad;
/* Create the video rendering bin, error is posted when this fails. */
vbin = gen_video_element (play_bin);
if (!vbin)
return NULL;
/* Text overlay */
overlay = gst_element_factory_make ("textoverlay", "overlay");
/* If no overlay return the video bin without subtitle support. */
if (!overlay)
goto no_overlay;
/* Create our bin */
element = gst_bin_new ("textbin");
/* Set some parameters */
g_object_set (G_OBJECT (overlay),
"halign", "center", "valign", "bottom", NULL);
if (play_bin->font_desc) {
g_object_set (G_OBJECT (overlay), "font-desc", play_bin->font_desc, NULL);
}
/* Take a ref */
play_bin->textoverlay_element = GST_ELEMENT_CAST (gst_object_ref (overlay));
/* we know this will succeed, as the video bin already created one before */
csp = gst_element_factory_make ("ffmpegcolorspace", "subtitlecsp");
/* Add our elements */
gst_bin_add_many (GST_BIN_CAST (element), csp, overlay, vbin, NULL);
/* Link */
gst_element_link_pads (csp, "src", overlay, "video_sink");
gst_element_link_pads (overlay, "src", vbin, "sink");
/* Add ghost pads on the subtitle bin */
pad = gst_element_get_pad (overlay, "text_sink");
gst_element_add_pad (element, gst_ghost_pad_new ("text_sink", pad));
gst_object_unref (pad);
pad = gst_element_get_pad (csp, "sink");
gst_element_add_pad (element, gst_ghost_pad_new ("sink", pad));
gst_object_unref (pad);
/* Set state to READY */
gst_element_set_state (element, GST_STATE_READY);
return element;
/* ERRORS */
no_overlay:
{
post_missing_element_message (play_bin, "textoverlay");
GST_WARNING_OBJECT (play_bin,
"No overlay (pango) element, subtitles disabled");
return vbin;
}
}
/* make the element (bin) that contains the elements needed to perform
* audio playback.
*
* +-------------------------------------------------------------+
* | abin |
* | +---------+ +----------+ +---------+ +---------+ |
* | |audioconv| |audioscale| | volume | |audiosink| |
* | +-sink src-sink src-sink src-sink | |
* | | +---------+ +----------+ +---------+ +---------+ |
* sink-+ |
* +-------------------------------------------------------------+
*/
static GstElement *
gen_audio_element (GstPlayBin * play_bin)
{
gboolean res;
GstElement *element;
GstElement *conv;
GstElement *scale;
GstElement *sink;
GstElement *volume;
GstPad *pad;
element = g_hash_table_lookup (play_bin->cache, "abin");
if (element != NULL)
return element;
if (play_bin->audio_sink) {
sink = play_bin->audio_sink;
} else {
sink = gst_element_factory_make ("autoaudiosink", "audiosink");
if (sink == NULL) {
sink = gst_element_factory_make ("alsasink", "audiosink");
}
if (sink == NULL)
goto no_sinks;
play_bin->audio_sink = GST_ELEMENT_CAST (gst_object_ref (sink));
}
gst_object_ref (sink);
g_hash_table_insert (play_bin->cache, "audio_sink", sink);
element = gst_bin_new ("abin");
gst_bin_add (GST_BIN_CAST (element), sink);
conv = gst_element_factory_make ("audioconvert", "aconv");
if (conv == NULL)
goto no_audioconvert;
gst_bin_add (GST_BIN_CAST (element), conv);
scale = gst_element_factory_make ("audioresample", "aresample");
if (scale == NULL)
goto no_audioresample;
gst_bin_add (GST_BIN_CAST (element), scale);
volume = gst_element_factory_make ("volume", "volume");
g_object_set (G_OBJECT (volume), "volume", play_bin->volume, NULL);
play_bin->volume_element = volume;
gst_bin_add (GST_BIN_CAST (element), volume);
res = gst_element_link_pads (conv, "src", scale, "sink");
res &= gst_element_link_pads (scale, "src", volume, "sink");
res &= gst_element_link_pads (volume, "src", sink, NULL);
if (!res)
goto link_failed;
pad = gst_element_get_pad (conv, "sink");
gst_element_add_pad (element, gst_ghost_pad_new ("sink", pad));
gst_object_unref (pad);
gst_element_set_state (element, GST_STATE_READY);
/* since we're gonna add it to a bin but don't want to lose it,
* we keep a reference. */
gst_object_ref (element);
g_hash_table_insert (play_bin->cache, "abin", element);
return element;
/* ERRORS */
no_sinks:
{
post_missing_element_message (play_bin, "autoaudiosink");
GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN,
(_("Both autoaudiosink and alsasink elements are missing.")), (NULL));
return NULL;
}
no_audioconvert:
{
post_missing_element_message (play_bin, "audioconvert");
GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN,
(_("Missing element '%s' - check your GStreamer installation."),
"audioconvert"), ("possibly a liboil version mismatch?"));
gst_object_unref (element);
return NULL;
}
no_audioresample:
{
post_missing_element_message (play_bin, "audioresample");
GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN,
(_("Missing element '%s' - check your GStreamer installation."),
"audioresample"), ("possibly a liboil version mismatch?"));
gst_object_unref (element);
return NULL;
}
link_failed:
{
GST_ELEMENT_ERROR (play_bin, CORE, PAD,
(NULL), ("Failed to configure the audio sink."));
gst_object_unref (element);
return NULL;
}
}
/* make the element (bin) that contains the elements needed to perform
* visualisation ouput. The idea is to split the audio using tee, then
* sending the output to the regular audio bin and the other output to
* the vis plugin that transforms it into a video that is rendered with the
* normal video bin. The video and audio bins are run in threads to make sure
* they don't block eachother.
*
* +-----------------------------------------------------------------------+
* | visbin |
* | +------+ +--------+ +----------------+ |
* | | tee | | aqueue | | abin ... | |
* | +-sink src-sink src-sink | |
* | | | | +--------+ +----------------+ |
* | | | | |
* | | | | +------+ +------------+ +------+ +-----------+ |
* | | | | |vqueue| | audioconv | | vis | | vbin ... | |
* | | | src-sink src-sink + samp src-sink src-sink | |
* | | | | +------+ +------------+ +------+ +-----------+ |
* | | | | |
* | | +------+ |
* sink-+ |
* +-----------------------------------------------------------------------+
*/
static GstElement *
gen_vis_element (GstPlayBin * play_bin)
{
gboolean res;
GstElement *element;
GstElement *tee;
GstElement *asink;
GstElement *vsink;
GstElement *conv;
GstElement *resamp;
GstElement *conv2;
GstElement *vis;
GstElement *vqueue, *aqueue;
GstPad *pad, *rpad;
/* errors are already posted when these fail. */
asink = gen_audio_element (play_bin);
if (!asink)
return NULL;
vsink = gen_video_element (play_bin);
if (!vsink) {
gst_object_unref (asink);
return NULL;
}
element = gst_bin_new ("visbin");
tee = gst_element_factory_make ("tee", "tee");
vqueue = gst_element_factory_make ("queue", "vqueue");
aqueue = gst_element_factory_make ("queue", "aqueue");
gst_bin_add (GST_BIN_CAST (element), asink);
gst_bin_add (GST_BIN_CAST (element), vqueue);
gst_bin_add (GST_BIN_CAST (element), aqueue);
gst_bin_add (GST_BIN_CAST (element), vsink);
gst_bin_add (GST_BIN_CAST (element), tee);
conv = gst_element_factory_make ("audioconvert", "aconv");
if (conv == NULL)
goto no_audioconvert;
gst_bin_add (GST_BIN_CAST (element), conv);
resamp = gst_element_factory_make ("audioresample", "aresamp");
if (resamp == NULL)
goto no_audioresample;
gst_bin_add (GST_BIN_CAST (element), resamp);
conv2 = gst_element_factory_make ("audioconvert", "aconv2");
if (conv2 == NULL)
goto no_audioconvert;
gst_bin_add (GST_BIN_CAST (element), conv2);
if (play_bin->visualisation) {
gst_object_ref (play_bin->visualisation);
vis = play_bin->visualisation;
} else {
vis = gst_element_factory_make ("goom", "vis");
if (!vis)
goto no_goom;
}
gst_bin_add (GST_BIN_CAST (element), vis);
res = gst_element_link_pads (vqueue, "src", conv, "sink");
res &= gst_element_link_pads (conv, "src", resamp, "sink");
res &= gst_element_link_pads (resamp, "src", conv2, "sink");
res &= gst_element_link_pads (conv2, "src", vis, "sink");
res &= gst_element_link_pads (vis, "src", vsink, "sink");
if (!res)
goto link_failed;
pad = gst_element_get_pad (aqueue, "sink");
rpad = gst_element_get_request_pad (tee, "src%d");
gst_pad_link (rpad, pad);
gst_object_unref (rpad);
gst_object_unref (pad);
gst_element_link_pads (aqueue, "src", asink, "sink");
pad = gst_element_get_pad (vqueue, "sink");
rpad = gst_element_get_request_pad (tee, "src%d");
gst_pad_link (rpad, pad);
gst_object_unref (rpad);
gst_object_unref (pad);
pad = gst_element_get_pad (tee, "sink");
gst_element_add_pad (element, gst_ghost_pad_new ("sink", pad));
gst_object_unref (pad);
return element;
/* ERRORS */
no_audioconvert:
{
post_missing_element_message (play_bin, "audioconvert");
GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN,
(_("Missing element '%s' - check your GStreamer installation."),
"audioconvert"), ("possibly a liboil version mismatch?"));
gst_object_unref (element);
return NULL;
}
no_audioresample:
{
post_missing_element_message (play_bin, "audioresample");
GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN,
(_("Missing element '%s' - check your GStreamer installation."),
"audioresample"), (NULL));
gst_object_unref (element);
return NULL;
}
no_goom:
{
post_missing_element_message (play_bin, "goom");
GST_ELEMENT_ERROR (play_bin, CORE, MISSING_PLUGIN,
(_("Missing element '%s' - check your GStreamer installation."),
"goom"), (NULL));
gst_object_unref (element);
return NULL;
}
link_failed:
{
GST_ELEMENT_ERROR (play_bin, CORE, PAD,
(NULL), ("Failed to configure the visualisation element."));
gst_object_unref (element);
return NULL;
}
}
/* get rid of all installed sinks */
static void
remove_sinks (GstPlayBin * play_bin)
{
GList *sinks;
GstObject *parent;
GstElement *element;
GstPad *pad, *peer;
if (play_bin->cache == NULL)
return;
GST_DEBUG ("removesinks");
element = g_hash_table_lookup (play_bin->cache, "abin");
if (element != NULL) {
parent = gst_element_get_parent (element);
if (parent != NULL) {
/* we remove the element from the parent so that
* there is no unwanted state change when the parent
* is disposed */
play_bin->sinks = g_list_remove (play_bin->sinks, element);
gst_element_set_state (element, GST_STATE_NULL);
gst_bin_remove (GST_BIN_CAST (parent), element);
gst_object_unref (parent);
}
pad = gst_element_get_pad (element, "sink");
if (pad != NULL) {
peer = gst_pad_get_peer (pad);
if (peer != NULL) {
gst_pad_unlink (peer, pad);
gst_object_unref (peer);
}
gst_object_unref (pad);
}
}
element = g_hash_table_lookup (play_bin->cache, "vbin");
if (element != NULL) {
parent = gst_element_get_parent (element);
if (parent != NULL) {
play_bin->sinks = g_list_remove (play_bin->sinks, element);
gst_element_set_state (element, GST_STATE_NULL);
gst_bin_remove (GST_BIN_CAST (parent), element);
gst_object_unref (parent);
}
pad = gst_element_get_pad (element, "sink");
if (pad != NULL) {
peer = gst_pad_get_peer (pad);
if (peer != NULL) {
gst_pad_unlink (peer, pad);
gst_object_unref (peer);
}
gst_object_unref (pad);
}
}
for (sinks = play_bin->sinks; sinks; sinks = g_list_next (sinks)) {
GstElement *element = GST_ELEMENT_CAST (sinks->data);
GstPad *pad;
GstPad *peer;
pad = gst_element_get_pad (element, "sink");
GST_LOG ("removing sink %p", element);
peer = gst_pad_get_peer (pad);
if (peer) {
gst_pad_unlink (peer, pad);
gst_object_unref (peer);
}
gst_object_unref (pad);
gst_element_set_state (element, GST_STATE_NULL);
gst_bin_remove (GST_BIN_CAST (play_bin), element);
}
g_list_free (play_bin->sinks);
play_bin->sinks = NULL;
if (play_bin->visualisation) {
GstElement *vis_bin;
vis_bin =
GST_ELEMENT_CAST (gst_element_get_parent (play_bin->visualisation));
gst_element_set_state (play_bin->visualisation, GST_STATE_NULL);
if (vis_bin) {
gst_bin_remove (GST_BIN_CAST (vis_bin), play_bin->visualisation);
gst_object_unref (vis_bin);
}
}
if (play_bin->frame) {
gst_buffer_unref (play_bin->frame);
play_bin->frame = NULL;
}
if (play_bin->textoverlay_element) {
gst_object_unref (play_bin->textoverlay_element);
play_bin->textoverlay_element = NULL;
}
}
/* loop over the streams and set up the pipeline to play this
* media file. First we count the number of audio and video streams.
* If there is no video stream but there exists an audio stream,
* we install a visualisation pipeline.
*
* Also make sure to only connect the first audio and video pad. FIXME
* this should eventually be handled with a tuner interface so that
* one can switch the streams.
*
* This function takes ownership of @sink.*
*/
static gboolean
add_sink (GstPlayBin * play_bin, GstElement * sink, GstPad * srcpad,
GstPad * subtitle_pad)
{
GstPad *sinkpad;
GstPadLinkReturn linkres;
GstElement *parent;
GstStateChangeReturn stateret;
GstState state;
g_return_val_if_fail (sink != NULL, FALSE);
state = GST_STATE_PAUSED;
/* this is only for debugging */
parent = gst_pad_get_parent_element (srcpad);
if (parent) {
GST_DEBUG ("Adding sink %" GST_PTR_FORMAT
" with state %d (parent: %d, peer: %d)", sink,
GST_STATE (sink), GST_STATE (play_bin), GST_STATE (parent));
gst_object_unref (parent);
}
gst_bin_add (GST_BIN_CAST (play_bin), sink);
/* bring it to the required state so we can link to the peer without
* breaking the flow */
stateret = gst_element_set_state (sink, state);
if (stateret == GST_STATE_CHANGE_FAILURE)
goto state_failed;
/* we found a sink for this stream, now try to install it */
sinkpad = gst_element_get_pad (sink, "sink");
linkres = gst_pad_link (srcpad, sinkpad);
gst_object_unref (sinkpad);
/* try to link the pad of the sink to the stream */
if (GST_PAD_LINK_FAILED (linkres))
goto link_failed;
if (GST_IS_PAD (subtitle_pad)) {
sinkpad = gst_element_get_pad (sink, "text_sink");
linkres = gst_pad_link (subtitle_pad, sinkpad);
gst_object_unref (sinkpad);
}
/* try to link the subtitle pad of the sink to the stream, this is not
* fatal. */
if (GST_PAD_LINK_FAILED (linkres))
goto subtitle_failed;
done:
/* we got the sink succesfully linked, now keep the sink
* in our internal list */
play_bin->sinks = g_list_prepend (play_bin->sinks, sink);
return TRUE;
/* ERRORS */
state_failed:
{
gst_element_set_state (sink, GST_STATE_NULL);
gst_bin_remove (GST_BIN_CAST (play_bin), sink);
GST_DEBUG_OBJECT (play_bin, "state change failure when adding sink");
return FALSE;
}
link_failed:
{
gchar *capsstr;
GstCaps *caps;
/* could not link this stream */
caps = gst_pad_get_caps (srcpad);
capsstr = gst_caps_to_string (caps);
g_warning ("could not link %s: %d", capsstr, linkres);
GST_DEBUG_OBJECT (play_bin,
"link failed when adding sink, caps %s, reason %d", capsstr, linkres);
g_free (capsstr);
gst_caps_unref (caps);
gst_element_set_state (sink, GST_STATE_NULL);
gst_bin_remove (GST_BIN_CAST (play_bin), sink);
return FALSE;
}
subtitle_failed:
{
GstCaps *caps;
/* could not link this stream */
caps = gst_pad_get_caps (subtitle_pad);
GST_WARNING_OBJECT (play_bin, "subtitle link failed when adding sink, "
"caps = %" GST_PTR_FORMAT ", reason %d", caps, linkres);
gst_caps_unref (caps);
/* not fatal */
goto done;
}
}
static void
dummy_blocked_cb (GstPad * pad, gboolean blocked, gpointer user_data)
{
}
static gboolean
setup_sinks (GstPlayBaseBin * play_base_bin, GstPlayBaseGroup * group)
{
GstPlayBin *play_bin = GST_PLAY_BIN (play_base_bin);
GList *streaminfo = NULL, *s;
gboolean need_vis = FALSE;
gboolean need_text = FALSE;
GstPad *textsrcpad = NULL, *pad = NULL, *origtextsrcpad = NULL;
GstElement *sink;
gboolean res = TRUE;
/* get rid of existing sinks */
if (play_bin->sinks) {
remove_sinks (play_bin);
}
GST_DEBUG_OBJECT (play_base_bin, "setupsinks");
/* find out what to do */
if (group->type[GST_STREAM_TYPE_VIDEO - 1].npads > 0 &&
group->type[GST_STREAM_TYPE_TEXT - 1].npads > 0) {
need_text = TRUE;
} else if (group->type[GST_STREAM_TYPE_VIDEO - 1].npads == 0 &&
group->type[GST_STREAM_TYPE_AUDIO - 1].npads > 0 &&
play_bin->visualisation != NULL) {
need_vis = TRUE;
}
/* now actually connect everything */
g_object_get (G_OBJECT (play_base_bin), "stream-info", &streaminfo, NULL);
for (s = streaminfo; s; s = g_list_next (s)) {
GObject *obj = G_OBJECT (s->data);
gint type;
GstObject *object;
g_object_get (obj, "type", &type, NULL);
g_object_get (obj, "object", &object, NULL);
}
/* link audio */
if (group->type[GST_STREAM_TYPE_AUDIO - 1].npads > 0) {
if (need_vis) {
sink = gen_vis_element (play_bin);
} else {
sink = gen_audio_element (play_bin);
}
if (!sink)
return FALSE;
pad = gst_element_get_pad (group->type[GST_STREAM_TYPE_AUDIO - 1].preroll,
"src");
res = add_sink (play_bin, sink, pad, NULL);
gst_object_unref (pad);
}
/* link video */
if (group->type[GST_STREAM_TYPE_VIDEO - 1].npads > 0) {
if (need_text) {
GstObject *parent = NULL, *grandparent = NULL;
GstPad *ghost = NULL;
sink = gen_text_element (play_bin);
textsrcpad =
gst_element_get_pad (group->type[GST_STREAM_TYPE_TEXT - 1].preroll,
"src");
/* This pad is from subtitle-bin, we need to create a ghost pad to have
common grandparents */
parent = gst_object_get_parent (GST_OBJECT_CAST (textsrcpad));
if (!parent) {
GST_WARNING_OBJECT (textsrcpad, "subtitle pad has no parent !");
gst_object_unref (textsrcpad);
textsrcpad = NULL;
goto beach;
}
grandparent = gst_object_get_parent (parent);
if (!grandparent) {
GST_WARNING_OBJECT (textsrcpad, "subtitle pad has no grandparent !");
gst_object_unref (parent);
gst_object_unref (textsrcpad);
textsrcpad = NULL;
goto beach;
}
/* We ghost the pad on subtitle_bin only, if the text pad is from the
media demuxer we keep it as it is */
if (!GST_IS_PLAY_BIN (grandparent)) {
GST_DEBUG_OBJECT (textsrcpad, "this subtitle pad is from a subtitle "
"file, ghosting to a suitable hierarchy");
/* Block the pad first, because as soon as we add a ghostpad, the queue
* will try and start pushing */
gst_pad_set_blocked_async (textsrcpad, TRUE, dummy_blocked_cb, NULL);
origtextsrcpad = gst_object_ref (textsrcpad);
ghost = gst_ghost_pad_new ("text_src", textsrcpad);
if (!GST_IS_PAD (ghost)) {
GST_WARNING_OBJECT (textsrcpad, "failed creating ghost pad for "
"subtitle-bin");
gst_object_unref (parent);
gst_object_unref (grandparent);
gst_object_unref (textsrcpad);
textsrcpad = NULL;
goto beach;
}
gst_pad_set_active (ghost, TRUE);
if (gst_element_add_pad (GST_ELEMENT_CAST (grandparent), ghost)) {
gst_object_unref (textsrcpad);
textsrcpad = gst_object_ref (ghost);
} else {
GST_WARNING_OBJECT (ghost, "failed adding ghost pad on subtitle-bin");
gst_pad_set_active (ghost, FALSE);
gst_object_unref (ghost);
gst_object_unref (textsrcpad);
textsrcpad = NULL;
}
} else {
GST_DEBUG_OBJECT (textsrcpad, "this subtitle pad is from the demuxer "
"no changes to hierarchy needed");
}
gst_object_unref (parent);
gst_object_unref (grandparent);
} else {
sink = gen_video_element (play_bin);
}
beach:
if (!sink)
return FALSE;
pad = gst_element_get_pad (group->type[GST_STREAM_TYPE_VIDEO - 1].preroll,
"src");
res = add_sink (play_bin, sink, pad, textsrcpad);
gst_object_unref (pad);
if (textsrcpad)
gst_object_unref (textsrcpad);
if (origtextsrcpad) {
gst_pad_set_blocked_async (origtextsrcpad, FALSE, dummy_blocked_cb, NULL);
gst_object_unref (origtextsrcpad);
}
}
/* remove the sinks now, pipeline get_state will now wait for the
* sinks to preroll */
if (play_bin->fakesink) {
gst_element_set_state (play_bin->fakesink, GST_STATE_NULL);
gst_bin_remove (GST_BIN_CAST (play_bin), play_bin->fakesink);
play_bin->fakesink = NULL;
}
return res;
}
static void
playbin_set_subtitles_visible (GstPlayBaseBin * play_base_bin, gboolean visible)
{
GstPlayBin *playbin = GST_PLAY_BIN (play_base_bin);
/* we're ignoring the case of someone setting the 'current-text' property
* before textoverlay is set up (which is probably okay, since playbasebin
* will just select the first subtitle stream as active stream regardless) */
if (playbin->textoverlay_element != NULL) {
GST_LOG_OBJECT (playbin, "setting subtitle visibility to %d", visible);
g_object_set (playbin->textoverlay_element, "silent", !visible, NULL);
}
}
/* Send an event to our sinks until one of them works; don't then send to the
* remaining sinks (unlike GstBin)
*/
static gboolean
gst_play_bin_send_event_to_sink (GstPlayBin * play_bin, GstEvent * event)
{
GList *sinks = play_bin->sinks;
gboolean res = TRUE;
while (sinks) {
GstElement *sink = GST_ELEMENT_CAST (sinks->data);
gst_event_ref (event);
if ((res = gst_element_send_event (sink, event))) {
GST_DEBUG_OBJECT (play_bin,
"Sent event succesfully to sink %" GST_PTR_FORMAT, sink);
break;
}
GST_DEBUG_OBJECT (play_bin,
"Event failed when sent to sink %" GST_PTR_FORMAT, sink);
sinks = g_list_next (sinks);
}
gst_event_unref (event);
return res;
}
/* We only want to send the event to a single sink (overriding GstBin's
* behaviour), but we want to keep GstPipeline's behaviour - wrapping seek
* events appropriately. So, this is a messy duplication of code. */
static gboolean
gst_play_bin_send_event (GstElement * element, GstEvent * event)
{
gboolean res = FALSE;
GstEventType event_type = GST_EVENT_TYPE (event);
switch (event_type) {
case GST_EVENT_SEEK:
GST_DEBUG_OBJECT (element, "Sending seek event to a sink");
res = gst_play_bin_send_event_to_sink (GST_PLAY_BIN (element), event);
break;
default:
res = parent_class->send_event (element, event);
break;
}
return res;
}
static void
value_list_append_structure_list (GValue * list_val, GstStructure ** first,
GList * structure_list)
{
GList *l;
for (l = structure_list; l != NULL; l = l->next) {
GValue val = { 0, };
if (*first == NULL)
*first = gst_structure_copy ((GstStructure *) l->data);
g_value_init (&val, GST_TYPE_STRUCTURE);
g_value_take_boxed (&val, gst_structure_copy ((GstStructure *) l->data));
gst_value_list_append_value (list_val, &val);
g_value_unset (&val);
}
}
/* if it's a redirect message with multiple redirect locations we might
* want to pick a different 'best' location depending on the required
* bitrates and the connection speed */
static GstMessage *
gst_play_bin_handle_redirect_message (GstPlayBin * playbin, GstMessage * msg)
{
const GValue *locations_list, *location_val;
GstMessage *new_msg;
GstStructure *new_structure = NULL;
GList *l_good = NULL, *l_neutral = NULL, *l_bad = NULL;
GValue new_list = { 0, };
guint size, i;
GstPlayBaseBin *playbasebin = GST_PLAY_BASE_BIN (playbin);
guint connection_speed = playbasebin->connection_speed;
GST_DEBUG_OBJECT (playbin, "redirect message: %" GST_PTR_FORMAT, msg);
GST_DEBUG_OBJECT (playbin, "connection speed: %u", connection_speed);
if (connection_speed == 0 || msg->structure == NULL)
return msg;
locations_list = gst_structure_get_value (msg->structure, "locations");
if (locations_list == NULL)
return msg;
size = gst_value_list_get_size (locations_list);
if (size < 2)
return msg;
/* maintain existing order as much as possible, just sort references
* with too high a bitrate to the end (the assumption being that if
* bitrates are given they are given for all interesting streams and
* that the you-need-at-least-version-xyz redirect has the same bitrate
* as the lowest referenced redirect alternative) */
for (i = 0; i < size; ++i) {
const GstStructure *s;
gint bitrate = 0;
location_val = gst_value_list_get_value (locations_list, i);
s = (const GstStructure *) g_value_get_boxed (location_val);
if (!gst_structure_get_int (s, "minimum-bitrate", &bitrate) || bitrate <= 0) {
GST_DEBUG_OBJECT (playbin, "no bitrate: %" GST_PTR_FORMAT, s);
l_neutral = g_list_append (l_neutral, (gpointer) s);
} else if (bitrate > connection_speed) {
GST_DEBUG_OBJECT (playbin, "bitrate too high: %" GST_PTR_FORMAT, s);
l_bad = g_list_append (l_bad, (gpointer) s);
} else if (bitrate <= connection_speed) {
GST_DEBUG_OBJECT (playbin, "bitrate OK: %" GST_PTR_FORMAT, s);
l_good = g_list_append (l_good, (gpointer) s);
}
}
g_value_init (&new_list, GST_TYPE_LIST);
value_list_append_structure_list (&new_list, &new_structure, l_good);
value_list_append_structure_list (&new_list, &new_structure, l_neutral);
value_list_append_structure_list (&new_list, &new_structure, l_bad);
gst_structure_set_value (new_structure, "locations", &new_list);
g_value_unset (&new_list);
g_list_free (l_good);
g_list_free (l_neutral);
g_list_free (l_bad);
new_msg = gst_message_new_element (msg->src, new_structure);
gst_message_unref (msg);
GST_DEBUG_OBJECT (playbin, "new redirect message: %" GST_PTR_FORMAT, new_msg);
return new_msg;
}
static void
gst_play_bin_handle_message (GstBin * bin, GstMessage * msg)
{
if (GST_MESSAGE_TYPE (msg) == GST_MESSAGE_ELEMENT && msg->structure != NULL
&& gst_structure_has_name (msg->structure, "redirect")) {
msg = gst_play_bin_handle_redirect_message (GST_PLAY_BIN (bin), msg);
}
GST_BIN_CLASS (parent_class)->handle_message (bin, msg);
}
static GstStateChangeReturn
gst_play_bin_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
GstPlayBin *play_bin;
play_bin = GST_PLAY_BIN (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
/* this really is the easiest way to make the state change return
* ASYNC until we added the sinks */
if (!play_bin->fakesink) {
play_bin->fakesink = gst_element_factory_make ("fakesink", "test");
gst_bin_add (GST_BIN_CAST (play_bin), play_bin->fakesink);
}
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
return ret;
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
/* remember us being a live pipeline */
play_bin->is_live = (ret == GST_STATE_CHANGE_NO_PREROLL);
GST_DEBUG_OBJECT (play_bin, "is live: %d", play_bin->is_live);
break;
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
/* FIXME Release audio device when we implement that */
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
case GST_STATE_CHANGE_READY_TO_NULL:
/* remove sinks we added */
remove_sinks (play_bin);
/* and there might be a fakesink we need to clean up now */
if (play_bin->fakesink) {
gst_element_set_state (play_bin->fakesink, GST_STATE_NULL);
gst_bin_remove (GST_BIN_CAST (play_bin), play_bin->fakesink);
play_bin->fakesink = NULL;
}
break;
default:
break;
}
return ret;
}
gboolean
gst_play_bin_plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (gst_play_bin_debug, "playbin", 0, "play bin");
return gst_element_register (plugin, "playbin", GST_RANK_NONE,
GST_TYPE_PLAY_BIN);
}
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