/* GStreamer
* Copyright (C) <2007> Wim Taymans <wim.taymans@gmail.com>
*
* 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-playbin2
*
* <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, &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 "gstplay-enum.h"
#include "gstplay-marshal.h"
#include "gstplaysink.h"
#include "gstfactorylists.h"
#include "gstscreenshot.h"
#include "gststreaminfo.h"
#include "gststreamselector.h"
#ifdef __SYMBIAN32__
#include <glib_global.h>
#endif
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;
typedef struct _GstSourceGroup GstSourceGroup;
typedef struct _GstSourceSelect GstSourceSelect;
/* has the info for a selector and provides the link to the sink */
struct _GstSourceSelect
{
const gchar *media; /* the media type of the selector */
GstPlaySinkType type; /* the sink pad type of the selector */
GstElement *selector; /* the selector */
GPtrArray *channels;
GstPad *srcpad; /* the source pad of the selector */
GstPad *sinkpad; /* the sinkpad of the sink when the selector is linked */
};
/* a structure to hold the objects for decoding a uri and the subtitle uri
*/
struct _GstSourceGroup
{
GstPlayBin *playbin;
gboolean valid; /* the group has valid info to start playback */
gboolean active; /* the group is active */
/* properties */
gchar *uri;
gchar *suburi;
GValueArray *streaminfo;
GstElement *source;
gchar *subencoding; /* encoding to propagate to the subtitle elements */
GPtrArray *video_channels; /* links to selector pads */
GPtrArray *audio_channels; /* links to selector pads */
GPtrArray *text_channels; /* links to selector pads */
/* uridecodebins for uri and subtitle uri */
GstElement *uridecodebin;
GstElement *suburidecodebin;
/* selectors for different streams */
GstSourceSelect selector[GST_PLAY_SINK_TYPE_LAST];
};
struct _GstPlayBin
{
GstPipeline parent;
/* the groups, we use a double buffer to switch between current and next */
GstSourceGroup groups[2]; /* array with group info */
GstSourceGroup *curr_group; /* pointer to the currently playing group */
GstSourceGroup *next_group; /* pointer to the next group */
gboolean about_to_finish; /* the about-to-finish signal is emited */
/* properties */
guint connection_speed; /* connection speed in bits/sec (0 = unknown) */
gint current_video; /* the currently selected stream */
gint current_audio; /* the currently selected stream */
gint current_text; /* the currently selected stream */
/* our play sink */
GstPlaySink *playsink;
GValueArray *elements; /* factories we can use for selecting elements */
};
struct _GstPlayBinClass
{
GstPipelineClass parent_class;
/* notify app that the current uri finished decoding and it is possible to
* queue a new one for gapless playback */
void (*about_to_finish) (GstPlayBin * playbin);
/* notify app that number of audio/video/text streams changed */
void (*video_changed) (GstPlayBin * playbin);
void (*audio_changed) (GstPlayBin * playbin);
void (*text_changed) (GstPlayBin * playbin);
/* get audio/video/text tags for a stream */
GstTagList *(*get_video_tags) (GstPlayBin * playbin, gint stream);
GstTagList *(*get_audio_tags) (GstPlayBin * playbin, gint stream);
GstTagList *(*get_text_tags) (GstPlayBin * playbin, gint stream);
/* get the last video frame and convert it to the given caps */
GstBuffer *(*convert_frame) (GstPlayBin * playbin, GstCaps * caps);
};
/* props */
#define DEFAULT_URI NULL
#define DEFAULT_SUBURI NULL
#define DEFAULT_SOURCE NULL
#define DEFAULT_FLAGS GST_PLAY_FLAG_AUDIO | GST_PLAY_FLAG_VIDEO | GST_PLAY_FLAG_TEXT | \
GST_PLAY_FLAG_SOFT_VOLUME
#define DEFAULT_N_VIDEO 0
#define DEFAULT_CURRENT_VIDEO -1
#define DEFAULT_N_AUDIO 0
#define DEFAULT_CURRENT_AUDIO -1
#define DEFAULT_N_TEXT 0
#define DEFAULT_CURRENT_TEXT -1
#define DEFAULT_SUBTITLE_ENCODING NULL
#define DEFAULT_AUDIO_SINK NULL
#define DEFAULT_VIDEO_SINK NULL
#define DEFAULT_VIS_PLUGIN NULL
#define DEFAULT_VOLUME 1.0
#define DEFAULT_MUTE FALSE
#define DEFAULT_FRAME NULL
#define DEFAULT_FONT_DESC NULL
#define DEFAULT_CONNECTION_SPEED 0
enum
{
PROP_0,
PROP_URI,
PROP_SUBURI,
PROP_SOURCE,
PROP_FLAGS,
PROP_N_VIDEO,
PROP_CURRENT_VIDEO,
PROP_N_AUDIO,
PROP_CURRENT_AUDIO,
PROP_N_TEXT,
PROP_CURRENT_TEXT,
PROP_SUBTITLE_ENCODING,
PROP_AUDIO_SINK,
PROP_VIDEO_SINK,
PROP_VIS_PLUGIN,
PROP_VOLUME,
PROP_MUTE,
PROP_FRAME,
PROP_FONT_DESC,
PROP_CONNECTION_SPEED
};
/* signals */
enum
{
SIGNAL_ABOUT_TO_FINISH,
SIGNAL_VIDEO_CHANGED,
SIGNAL_AUDIO_CHANGED,
SIGNAL_TEXT_CHANGED,
SIGNAL_GET_VIDEO_TAGS,
SIGNAL_GET_AUDIO_TAGS,
SIGNAL_GET_TEXT_TAGS,
LAST_SIGNAL
};
static void gst_play_bin_class_init (GstPlayBinClass * klass);
static void gst_play_bin_init (GstPlayBin * playbin);
static void gst_play_bin_finalize (GObject * object);
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 GstStateChangeReturn gst_play_bin_change_state (GstElement * element,
GstStateChange transition);
static void gst_play_bin_handle_message (GstBin * bin, GstMessage * message);
static GstTagList *gst_play_bin_get_video_tags (GstPlayBin * playbin,
gint stream);
static GstTagList *gst_play_bin_get_audio_tags (GstPlayBin * playbin,
gint stream);
static GstTagList *gst_play_bin_get_text_tags (GstPlayBin * playbin,
gint stream);
static GstBuffer *gst_play_bin_convert_frame (GstPlayBin * playbin,
GstCaps * caps);
static gboolean setup_next_source (GstPlayBin * playbin);
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 2",
"Generic/Bin/Player",
"Autoplug and play media from an uri",
"Wim Taymans <wim.taymans@gmail.com>");
static void
gst_play_marshal_BUFFER__BOXED (GClosure * closure,
GValue * return_value G_GNUC_UNUSED,
guint n_param_values,
const GValue * param_values,
gpointer invocation_hint G_GNUC_UNUSED, gpointer marshal_data)
{
typedef GstBuffer *(*GMarshalFunc_OBJECT__BOXED) (gpointer data1,
gpointer arg_1, gpointer data2);
register GMarshalFunc_OBJECT__BOXED callback;
register GCClosure *cc = (GCClosure *) closure;
register gpointer data1, data2;
GstBuffer *v_return;
g_return_if_fail (return_value != NULL);
g_return_if_fail (n_param_values == 2);
if (G_CCLOSURE_SWAP_DATA (closure)) {
data1 = closure->data;
data2 = g_value_peek_pointer (param_values + 0);
} else {
data1 = g_value_peek_pointer (param_values + 0);
data2 = closure->data;
}
callback =
(GMarshalFunc_OBJECT__BOXED) (marshal_data ? marshal_data : cc->callback);
v_return = callback (data1, g_value_get_boxed (param_values + 1), data2);
gst_value_take_buffer (return_value, v_return);
}
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_PIPELINE,
"GstPlayBin2", &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;
gobject_klass = (GObjectClass *) klass;
gstelement_klass = (GstElementClass *) klass;
gstbin_klass = (GstBinClass *) 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;
gobject_klass->finalize = GST_DEBUG_FUNCPTR (gst_play_bin_finalize);
/**
* GstPlayBin:uri
*
* Set the next URI that playbin will play. This property can be set from the
* about-to-finish signal to queue the next media file.
*/
g_object_class_install_property (gobject_klass, PROP_URI,
g_param_spec_string ("uri", "URI", "URI of the media to play",
NULL, G_PARAM_READWRITE));
/**
* GstPlayBin:suburi
*
* Set the next subtitle URI that playbin will play. This property can be
* set from the about-to-finish signal to queue the next subtitle media file.
*/
g_object_class_install_property (gobject_klass, PROP_SUBURI,
g_param_spec_string ("suburi", ".sub-URI", "Optional URI of a subtitle",
NULL, G_PARAM_READWRITE));
g_object_class_install_property (gobject_klass, PROP_SOURCE,
g_param_spec_object ("source", "Source", "Source element",
GST_TYPE_ELEMENT, G_PARAM_READABLE));
/**
* GstPlayBin:flags
*
* Control the behaviour of playbin.
*/
g_object_class_install_property (gobject_klass, PROP_FLAGS,
g_param_spec_flags ("flags", "Flags", "Flags to control behaviour",
GST_TYPE_PLAY_FLAGS, DEFAULT_FLAGS, G_PARAM_READWRITE));
/**
* GstPlayBin:n-video
*
* Get the total number of available video streams.
*/
g_object_class_install_property (gobject_klass, PROP_N_VIDEO,
g_param_spec_int ("n-video", "Number Video",
"Total number of video streams", 0, G_MAXINT, 0, G_PARAM_READABLE));
/**
* GstPlayBin:current-video
*
* Get or set the currently playing video stream. By default the first video
* stream with data is played.
*/
g_object_class_install_property (gobject_klass, PROP_CURRENT_VIDEO,
g_param_spec_int ("current-video", "Current Video",
"Currently playing video stream (-1 = auto)",
-1, G_MAXINT, -1, G_PARAM_READWRITE));
/**
* GstPlayBin:n-audio
*
* Get the total number of available audio streams.
*/
g_object_class_install_property (gobject_klass, PROP_N_AUDIO,
g_param_spec_int ("n-audio", "Number Audio",
"Total number of audio streams", 0, G_MAXINT, 0, G_PARAM_READABLE));
/**
* GstPlayBin:current-audio
*
* Get or set the currently playing audio stream. By default the first audio
* stream with data is played.
*/
g_object_class_install_property (gobject_klass, PROP_CURRENT_AUDIO,
g_param_spec_int ("current-audio", "Current audio",
"Currently playing audio stream (-1 = auto)",
-1, G_MAXINT, -1, G_PARAM_READWRITE));
/**
* GstPlayBin:n-text
*
* Get the total number of available subtitle streams.
*/
g_object_class_install_property (gobject_klass, PROP_N_TEXT,
g_param_spec_int ("n-text", "Number Text",
"Total number of text streams", 0, G_MAXINT, 0, G_PARAM_READABLE));
/**
* GstPlayBin:current-text
*
* Get or set the currently playing subtitle stream. By default the first
* subtitle stream with data is played.
*/
g_object_class_install_property (gobject_klass, PROP_CURRENT_TEXT,
g_param_spec_int ("current-text", "Current Text",
"Currently playing text stream (-1 = auto)",
-1, G_MAXINT, -1, G_PARAM_READWRITE));
g_object_class_install_property (gobject_klass, PROP_SUBTITLE_ENCODING,
g_param_spec_string ("subtitle-encoding", "subtitle encoding",
"Encoding to assume if input subtitles are not in UTF-8 encoding. "
"If not set, the GST_SUBTITLE_ENCODING environment variable will "
"be checked for an encoding to use. If that is not set either, "
"ISO-8859-15 will be assumed.", NULL, G_PARAM_READWRITE));
g_object_class_install_property (gobject_klass, PROP_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, PROP_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, PROP_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, PROP_VOLUME,
g_param_spec_double ("volume", "Volume", "The audio volume",
0.0, VOLUME_MAX_DOUBLE, 1.0, G_PARAM_READWRITE));
g_object_class_install_property (gobject_klass, PROP_MUTE,
g_param_spec_boolean ("mute", "Mute",
"Mute the audio channel without changing the volume", FALSE,
G_PARAM_READWRITE));
/**
* GstPlayBin::frame
* @playbin: a #GstPlayBin
*
* Get the currently rendered or prerolled frame in the sink.
* The #GstCaps on the buffer will describe the format of the buffer.
*/
g_object_class_install_property (gobject_klass, PROP_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, PROP_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));
g_object_class_install_property (gobject_klass, PROP_CONNECTION_SPEED,
g_param_spec_uint ("connection-speed", "Connection Speed",
"Network connection speed in kbps (0 = unknown)",
0, G_MAXUINT, DEFAULT_CONNECTION_SPEED, G_PARAM_READWRITE));
/**
* GstPlayBin::about-to-finish:
* @playbin: a #GstPlayBin
*
* This signal is emitted when the current uri is about to finish. You can
* set the next-uri and next-suburi to make sure that playback continues.
*/
gst_play_bin_signals[SIGNAL_ABOUT_TO_FINISH] =
g_signal_new ("about-to-finish", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstPlayBinClass, about_to_finish), NULL, NULL,
gst_marshal_VOID__VOID, G_TYPE_NONE, 0, G_TYPE_NONE);
/**
* GstPlayBin::video-changed
* @playbin: a #GstPlayBin
*
* This signal is emited whenever the number or order of the video
* streams has changed. The application will most likely want to select
* a new video stream.
*/
gst_play_bin_signals[SIGNAL_VIDEO_CHANGED] =
g_signal_new ("video-changed", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstPlayBinClass, video_changed), NULL, NULL,
gst_marshal_VOID__VOID, G_TYPE_NONE, 0, G_TYPE_NONE);
/**
* GstPlayBin::audio-changed
* @playbin: a #GstPlayBin
*
* This signal is emited whenever the number or order of the audio
* streams has changed. The application will most likely want to select
* a new audio stream.
*/
gst_play_bin_signals[SIGNAL_AUDIO_CHANGED] =
g_signal_new ("audio-changed", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstPlayBinClass, audio_changed), NULL, NULL,
gst_marshal_VOID__VOID, G_TYPE_NONE, 0, G_TYPE_NONE);
/**
* GstPlayBin::text-changed
* @playbin: a #GstPlayBin
*
* This signal is emited whenever the number or order of the text
* streams has changed. The application will most likely want to select
* a new text stream.
*/
gst_play_bin_signals[SIGNAL_TEXT_CHANGED] =
g_signal_new ("text-changed", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GstPlayBinClass, text_changed), NULL, NULL,
gst_marshal_VOID__VOID, G_TYPE_NONE, 0, G_TYPE_NONE);
/**
* GstPlayBin::get-video-tags
* @playbin: a #GstPlayBin
* @stream: a video stream number
*
* Action signal to retrieve the tags of a specific video stream number.
* This information can be used to select a stream.
*
* Returns: a GstTagList with tags or NULL when the stream number does not
* exist.
*/
gst_play_bin_signals[SIGNAL_GET_VIDEO_TAGS] =
g_signal_new ("get-video-tags", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GstPlayBinClass, get_video_tags), NULL, NULL,
gst_play_marshal_BOXED__INT, GST_TYPE_TAG_LIST, 1, G_TYPE_INT);
/**
* GstPlayBin::get-audio-tags
* @playbin: a #GstPlayBin
* @stream: an audio stream number
*
* Action signal to retrieve the tags of a specific audio stream number.
* This information can be used to select a stream.
*
* Returns: a GstTagList with tags or NULL when the stream number does not
* exist.
*/
gst_play_bin_signals[SIGNAL_GET_AUDIO_TAGS] =
g_signal_new ("get-audio-tags", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GstPlayBinClass, get_audio_tags), NULL, NULL,
gst_play_marshal_BOXED__INT, GST_TYPE_TAG_LIST, 1, G_TYPE_INT);
/**
* GstPlayBin::get-text-tags
* @playbin: a #GstPlayBin
* @stream: a text stream number
*
* Action signal to retrieve the tags of a specific text stream number.
* This information can be used to select a stream.
*
* Returns: a GstTagList with tags or NULL when the stream number does not
* exist.
*/
gst_play_bin_signals[SIGNAL_GET_TEXT_TAGS] =
g_signal_new ("get-text-tags", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GstPlayBinClass, get_text_tags), NULL, NULL,
gst_play_marshal_BOXED__INT, GST_TYPE_TAG_LIST, 1, G_TYPE_INT);
/**
* GstPlayBin::convert-frame
* @playbin: a #GstPlayBin
* @caps: the target format of the frame
*
* Action signal to retrieve the currently playing video frame in the format
* specified by @caps.
* If @caps is %NULL, no conversion will be performed and this function is
* equivalent to the #GstPlayBin::frame property.
*
* Returns: a #GstBuffer of the current video frame converted to #caps.
* The caps on the buffer will describe the final layout of the buffer data.
* %NULL is returned when no current buffer can be retrieved or when the
* conversion failed.
*/
gst_play_bin_signals[SIGNAL_GET_TEXT_TAGS] =
g_signal_new ("convert-frame", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GstPlayBinClass, convert_frame), NULL, NULL,
gst_play_marshal_BUFFER__BOXED, GST_TYPE_BUFFER, 1, GST_TYPE_CAPS);
klass->get_video_tags = gst_play_bin_get_video_tags;
klass->get_audio_tags = gst_play_bin_get_audio_tags;
klass->get_text_tags = gst_play_bin_get_text_tags;
klass->convert_frame = gst_play_bin_convert_frame;
gst_element_class_set_details (gstelement_klass, &gst_play_bin_details);
gstelement_klass->change_state =
GST_DEBUG_FUNCPTR (gst_play_bin_change_state);
gstbin_klass->handle_message =
GST_DEBUG_FUNCPTR (gst_play_bin_handle_message);
}
static void
init_group (GstPlayBin * playbin, GstSourceGroup * group)
{
/* store the array for the different channels */
group->video_channels = g_ptr_array_new ();
group->audio_channels = g_ptr_array_new ();
group->text_channels = g_ptr_array_new ();
/* init selectors */
group->playbin = playbin;
group->selector[0].media = "audio/x-raw-";
group->selector[0].type = GST_PLAY_SINK_TYPE_AUDIO_RAW;
group->selector[0].channels = group->audio_channels;
group->selector[1].media = "audio/";
group->selector[1].type = GST_PLAY_SINK_TYPE_AUDIO;
group->selector[1].channels = group->audio_channels;
group->selector[2].media = "video/x-raw-";
group->selector[2].type = GST_PLAY_SINK_TYPE_VIDEO_RAW;
group->selector[2].channels = group->video_channels;
group->selector[3].media = "video/";
group->selector[3].type = GST_PLAY_SINK_TYPE_VIDEO;
group->selector[3].channels = group->video_channels;
group->selector[4].media = "text/";
group->selector[4].type = GST_PLAY_SINK_TYPE_TEXT;
group->selector[4].channels = group->text_channels;
}
static void
gst_play_bin_init (GstPlayBin * playbin)
{
GstFactoryListType type;
/* init groups */
playbin->curr_group = &playbin->groups[0];
playbin->next_group = &playbin->groups[1];
init_group (playbin, &playbin->groups[0]);
init_group (playbin, &playbin->groups[1]);
/* first filter out the interesting element factories */
type = GST_FACTORY_LIST_DECODER | GST_FACTORY_LIST_SINK;
playbin->elements = gst_factory_list_get_elements (type);
gst_factory_list_debug (playbin->elements);
/* add sink */
playbin->playsink = g_object_new (GST_TYPE_PLAY_SINK, NULL);
gst_bin_add (GST_BIN_CAST (playbin), GST_ELEMENT_CAST (playbin->playsink));
gst_play_sink_set_flags (playbin->playsink, DEFAULT_FLAGS);
playbin->current_video = DEFAULT_CURRENT_VIDEO;
playbin->current_audio = DEFAULT_CURRENT_AUDIO;
playbin->current_text = DEFAULT_CURRENT_TEXT;
}
static void
gst_play_bin_finalize (GObject * object)
{
GstPlayBin *playbin;
playbin = GST_PLAY_BIN (object);
g_value_array_free (playbin->elements);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_play_bin_set_uri (GstPlayBin * playbin, const gchar * uri)
{
GstSourceGroup *group;
if (uri == NULL) {
g_warning ("cannot set NULL uri");
return;
}
GST_OBJECT_LOCK (playbin);
group = playbin->next_group;
/* if we have no previous uri, or the new uri is different from the
* old one, replug */
g_free (group->uri);
group->uri = g_strdup (uri);
group->valid = TRUE;
GST_DEBUG ("setting new uri to %s", uri);
GST_OBJECT_UNLOCK (playbin);
}
static void
gst_play_bin_set_suburi (GstPlayBin * playbin, const gchar * suburi)
{
GstSourceGroup *group;
GST_OBJECT_LOCK (playbin);
group = playbin->next_group;
if ((!suburi && !group->suburi) ||
(suburi && group->suburi && !strcmp (group->suburi, suburi)))
goto done;
g_free (group->suburi);
group->suburi = g_strdup (suburi);
GST_DEBUG ("setting new .sub uri to %s", suburi);
done:
GST_OBJECT_UNLOCK (playbin);
}
/* get the currently playing group or if nothing is playing, the next
* group. Must be called with the LOCK. */
static GstSourceGroup *
get_group (GstPlayBin * playbin)
{
GstSourceGroup *result;
if (!(result = playbin->curr_group))
result = playbin->next_group;
return result;
}
static GstTagList *
get_tags (GstPlayBin * playbin, GPtrArray * channels, gint stream)
{
GstTagList *result;
GstPad *sinkpad;
if (!channels || channels->len < stream)
return NULL;
sinkpad = g_ptr_array_index (channels, stream);
g_object_get (sinkpad, "tags", &result, NULL);
return result;
}
static GstTagList *
gst_play_bin_get_video_tags (GstPlayBin * playbin, gint stream)
{
GstTagList *result;
GstSourceGroup *group;
GST_OBJECT_LOCK (playbin);
group = get_group (playbin);
result = get_tags (playbin, group->video_channels, stream);
GST_OBJECT_UNLOCK (playbin);
return result;
}
static GstTagList *
gst_play_bin_get_audio_tags (GstPlayBin * playbin, gint stream)
{
GstTagList *result;
GstSourceGroup *group;
GST_OBJECT_LOCK (playbin);
group = get_group (playbin);
result = get_tags (playbin, group->audio_channels, stream);
GST_OBJECT_UNLOCK (playbin);
return result;
}
static GstTagList *
gst_play_bin_get_text_tags (GstPlayBin * playbin, gint stream)
{
GstTagList *result;
GstSourceGroup *group;
GST_OBJECT_LOCK (playbin);
group = get_group (playbin);
result = get_tags (playbin, group->text_channels, stream);
GST_OBJECT_UNLOCK (playbin);
return result;
}
static GstBuffer *
gst_play_bin_convert_frame (GstPlayBin * playbin, GstCaps * caps)
{
GstBuffer *result;
result = gst_play_sink_get_last_frame (playbin->playsink);
if (result != NULL && caps != NULL) {
GstBuffer *temp;
temp = gst_play_frame_conv_convert (result, caps);
gst_buffer_unref (result);
result = temp;
}
return result;
}
static gboolean
gst_play_bin_set_current_video_stream (GstPlayBin * playbin, gint stream)
{
GstSourceGroup *group;
GPtrArray *channels;
GstPad *sinkpad;
GST_OBJECT_LOCK (playbin);
group = get_group (playbin);
if (!(channels = group->video_channels))
goto no_channels;
if (stream == -1 || channels->len < stream) {
sinkpad = NULL;
} else {
/* take channel from selected stream */
sinkpad = g_ptr_array_index (channels, stream);
}
if (sinkpad)
gst_object_ref (sinkpad);
GST_OBJECT_UNLOCK (playbin);
if (sinkpad) {
GstObject *selector;
if ((selector = gst_pad_get_parent (sinkpad))) {
/* activate the selected pad */
g_object_set (selector, "active-pad", sinkpad, NULL);
gst_object_unref (selector);
}
gst_object_unref (sinkpad);
}
return TRUE;
no_channels:
{
GST_OBJECT_UNLOCK (playbin);
return FALSE;
}
}
static gboolean
gst_play_bin_set_current_audio_stream (GstPlayBin * playbin, gint stream)
{
GstSourceGroup *group;
GPtrArray *channels;
GstPad *sinkpad;
GST_OBJECT_LOCK (playbin);
group = get_group (playbin);
if (!(channels = group->audio_channels))
goto no_channels;
if (stream == -1 || channels->len < stream) {
sinkpad = NULL;
} else {
/* take channel from selected stream */
sinkpad = g_ptr_array_index (channels, stream);
}
if (sinkpad)
gst_object_ref (sinkpad);
GST_OBJECT_UNLOCK (playbin);
if (sinkpad) {
GstObject *selector;
if ((selector = gst_pad_get_parent (sinkpad))) {
/* activate the selected pad */
g_object_set (selector, "active-pad", sinkpad, NULL);
gst_object_unref (selector);
}
gst_object_unref (sinkpad);
}
return TRUE;
no_channels:
{
GST_OBJECT_UNLOCK (playbin);
return FALSE;
}
}
static gboolean
gst_play_bin_set_current_text_stream (GstPlayBin * playbin, gint stream)
{
GstSourceGroup *group;
GPtrArray *channels;
GstPad *sinkpad;
GST_OBJECT_LOCK (playbin);
group = get_group (playbin);
if (!(channels = group->text_channels))
goto no_channels;
if (stream == -1 || channels->len < stream) {
sinkpad = NULL;
} else {
/* take channel from selected stream */
sinkpad = g_ptr_array_index (channels, stream);
}
if (sinkpad)
gst_object_ref (sinkpad);
GST_OBJECT_UNLOCK (playbin);
if (sinkpad) {
GstObject *selector;
if ((selector = gst_pad_get_parent (sinkpad))) {
/* activate the selected pad */
g_object_set (selector, "active-pad", sinkpad, NULL);
gst_object_unref (selector);
}
gst_object_unref (sinkpad);
}
return TRUE;
no_channels:
{
GST_OBJECT_UNLOCK (playbin);
return FALSE;
}
}
static void
gst_play_bin_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstPlayBin *playbin;
playbin = GST_PLAY_BIN (object);
switch (prop_id) {
case PROP_URI:
gst_play_bin_set_uri (playbin, g_value_get_string (value));
break;
case PROP_SUBURI:
gst_play_bin_set_suburi (playbin, g_value_get_string (value));
break;
case PROP_FLAGS:
gst_play_sink_set_flags (playbin->playsink, g_value_get_flags (value));
break;
case PROP_CURRENT_VIDEO:
gst_play_bin_set_current_video_stream (playbin, g_value_get_int (value));
break;
case PROP_CURRENT_AUDIO:
gst_play_bin_set_current_audio_stream (playbin, g_value_get_int (value));
break;
case PROP_CURRENT_TEXT:
gst_play_bin_set_current_text_stream (playbin, g_value_get_int (value));
break;
case PROP_SUBTITLE_ENCODING:
break;
case PROP_VIDEO_SINK:
break;
case PROP_AUDIO_SINK:
break;
case PROP_VIS_PLUGIN:
gst_play_sink_set_vis_plugin (playbin->playsink,
g_value_get_object (value));
break;
case PROP_VOLUME:
gst_play_sink_set_volume (playbin->playsink, g_value_get_double (value));
break;
case PROP_MUTE:
gst_play_sink_set_mute (playbin->playsink, g_value_get_boolean (value));
break;
case PROP_FONT_DESC:
break;
case PROP_CONNECTION_SPEED:
GST_OBJECT_LOCK (playbin);
playbin->connection_speed = g_value_get_uint (value) * 1000;
GST_OBJECT_UNLOCK (playbin);
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 *playbin;
playbin = GST_PLAY_BIN (object);
switch (prop_id) {
case PROP_URI:
{
GstSourceGroup *group;
GST_OBJECT_LOCK (playbin);
group = get_group (playbin);
g_value_set_string (value, group->uri);
GST_OBJECT_UNLOCK (playbin);
break;
}
case PROP_SUBURI:
{
GstSourceGroup *group;
GST_OBJECT_LOCK (playbin);
group = get_group (playbin);
g_value_set_string (value, group->suburi);
GST_OBJECT_UNLOCK (playbin);
break;
}
case PROP_SOURCE:
break;
case PROP_FLAGS:
g_value_set_flags (value, gst_play_sink_get_flags (playbin->playsink));
break;
case PROP_N_VIDEO:
{
GstSourceGroup *group;
gint n_video;
GST_OBJECT_LOCK (playbin);
group = get_group (playbin);
n_video = (group->video_channels ? group->video_channels->len : 0);
g_value_set_int (value, n_video);
GST_OBJECT_UNLOCK (playbin);
break;
}
case PROP_CURRENT_VIDEO:
GST_OBJECT_LOCK (playbin);
g_value_set_int (value, playbin->current_video);
GST_OBJECT_UNLOCK (playbin);
break;
case PROP_N_AUDIO:
{
GstSourceGroup *group;
gint n_audio;
GST_OBJECT_LOCK (playbin);
group = get_group (playbin);
n_audio = (group->audio_channels ? group->audio_channels->len : 0);
g_value_set_int (value, n_audio);
GST_OBJECT_UNLOCK (playbin);
break;
}
case PROP_CURRENT_AUDIO:
GST_OBJECT_LOCK (playbin);
g_value_set_int (value, playbin->current_audio);
GST_OBJECT_UNLOCK (playbin);
break;
case PROP_N_TEXT:
{
GstSourceGroup *group;
gint n_text;
GST_OBJECT_LOCK (playbin);
group = get_group (playbin);
n_text = (group->text_channels ? group->text_channels->len : 0);
g_value_set_int (value, n_text);
GST_OBJECT_UNLOCK (playbin);
break;
}
case PROP_CURRENT_TEXT:
GST_OBJECT_LOCK (playbin);
g_value_set_int (value, playbin->current_text);
GST_OBJECT_UNLOCK (playbin);
break;
case PROP_SUBTITLE_ENCODING:
break;
case PROP_VIDEO_SINK:
break;
case PROP_AUDIO_SINK:
break;
case PROP_VIS_PLUGIN:
break;
case PROP_VOLUME:
g_value_set_double (value, gst_play_sink_get_volume (playbin->playsink));
break;
case PROP_MUTE:
g_value_set_boolean (value, gst_play_sink_get_mute (playbin->playsink));
break;
case PROP_FRAME:
gst_value_take_buffer (value, gst_play_bin_convert_frame (playbin, NULL));
break;
case PROP_FONT_DESC:
break;
case PROP_CONNECTION_SPEED:
GST_OBJECT_LOCK (playbin);
g_value_set_uint (value, playbin->connection_speed / 1000);
GST_OBJECT_UNLOCK (playbin);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* mime types we are not handling on purpose right now, don't post a
* missing-plugin message for these */
static const gchar *blacklisted_mimes[] = {
"video/x-dvd-subpicture", NULL
};
static void
gst_play_bin_handle_message (GstBin * bin, GstMessage * msg)
{
if (gst_is_missing_plugin_message (msg)) {
gchar *detail;
guint i;
detail = gst_missing_plugin_message_get_installer_detail (msg);
for (i = 0; detail != NULL && blacklisted_mimes[i] != NULL; ++i) {
if (strstr (detail, "|decoder-") && strstr (detail, blacklisted_mimes[i])) {
GST_LOG_OBJECT (bin, "suppressing message %" GST_PTR_FORMAT, msg);
gst_message_unref (msg);
g_free (detail);
return;
}
}
g_free (detail);
}
GST_BIN_CLASS (parent_class)->handle_message (bin, msg);
}
/* this function is called when a new pad is added to decodebin. We check the
* type of the pad and add it to the selecter element of the group.
*/
static void
pad_added_cb (GstElement * decodebin, GstPad * pad, GstSourceGroup * group)
{
GstPlayBin *playbin;
GstCaps *caps;
const GstStructure *s;
const gchar *name;
GstPad *sinkpad;
GstPadLinkReturn res;
GstSourceSelect *select = NULL;
gint i;
playbin = group->playbin;
caps = gst_pad_get_caps (pad);
s = gst_caps_get_structure (caps, 0);
name = gst_structure_get_name (s);
GST_DEBUG_OBJECT (playbin,
"pad %s:%s with caps %" GST_PTR_FORMAT " added in group %p",
GST_DEBUG_PAD_NAME (pad), caps, group);
/* major type of the pad, this determines the selector to use */
for (i = 0; i < GST_PLAY_SINK_TYPE_LAST; i++) {
if (g_str_has_prefix (name, group->selector[i].media)) {
select = &group->selector[i];
break;
}
}
/* no selector found for the media type, don't bother linking it to a
* selector. This will leave the pad unlinked and thus ignored. */
if (select == NULL)
goto unknown_type;
if (select->selector == NULL) {
/* no selector, create one */
GST_DEBUG_OBJECT (playbin, "creating new selector");
select->selector = g_object_new (GST_TYPE_STREAM_SELECTOR, NULL);
if (select->selector == NULL)
goto no_selector;
GST_DEBUG_OBJECT (playbin, "adding new selector %p", select->selector);
gst_bin_add (GST_BIN_CAST (playbin), select->selector);
gst_element_set_state (select->selector, GST_STATE_PAUSED);
/* save source pad */
select->srcpad = gst_element_get_pad (select->selector, "src");
}
/* get sinkpad for the new stream */
if ((sinkpad = gst_element_get_request_pad (select->selector, "sink%d"))) {
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);
/* store the pad in the array */
GST_DEBUG_OBJECT (playbin, "pad %p added to array", sinkpad);
g_ptr_array_add (select->channels, sinkpad);
res = gst_pad_link (pad, sinkpad);
if (GST_PAD_LINK_FAILED (res))
goto link_failed;
/* store selector pad so we can release it */
g_object_set_data (G_OBJECT (pad), "playbin2.sinkpad", sinkpad);
}
GST_DEBUG_OBJECT (playbin, "linked pad %s:%s to selector %p",
GST_DEBUG_PAD_NAME (pad), select->selector);
return;
/* ERRORS */
unknown_type:
{
GST_ERROR_OBJECT (playbin, "unknown type %s for pad %s:%s",
name, GST_DEBUG_PAD_NAME (pad));
return;
}
no_selector:
{
GST_ERROR_OBJECT (playbin, "could not create selector for pad %s:%s",
GST_DEBUG_PAD_NAME (pad));
return;
}
link_failed:
{
GST_ERROR_OBJECT (playbin,
"failed to link pad %s:%s to selector, reason %d",
GST_DEBUG_PAD_NAME (pad), res);
return;
}
}
/* called when a pad is removed form the uridecodebin. We unlink the pad from
* the selector. This will make the selector select a new pad. */
static void
pad_removed_cb (GstElement * decodebin, GstPad * pad, GstSourceGroup * group)
{
GstPlayBin *playbin;
GstPad *peer;
GstElement *selector;
GstSourceSelect *select;
playbin = group->playbin;
GST_DEBUG_OBJECT (playbin,
"pad %s:%s removed from group %p", GST_DEBUG_PAD_NAME (pad), group);
/* get the selector sinkpad */
if (!(peer = g_object_get_data (G_OBJECT (pad), "playbin2.sinkpad")))
goto not_linked;
if ((select = g_object_get_data (G_OBJECT (peer), "playbin2.select"))) {
/* remove the pad from the array */
g_ptr_array_remove (select->channels, peer);
GST_DEBUG_OBJECT (playbin, "pad %p removed from array", peer);
}
/* unlink the pad now (can fail, the pad is unlinked before it's removed) */
gst_pad_unlink (pad, peer);
/* get selector, this can be NULL when the element is removing the pads
* because it's being disposed. */
selector = GST_ELEMENT_CAST (gst_pad_get_parent (peer));
if (!selector)
goto no_selector;
/* release the pad to the selector, this will make the selector choose a new
* pad. */
gst_element_release_request_pad (selector, peer);
gst_object_unref (selector);
return;
/* ERRORS */
not_linked:
{
GST_DEBUG_OBJECT (playbin, "pad not linked");
return;
}
no_selector:
{
GST_DEBUG_OBJECT (playbin, "selector not found");
return;
}
}
/* we get called when all pads are available and we must connect the sinks to
* them.
* The main purpose of the code is to see if we have video/audio and subtitles
* and pick the right pipelines to display them.
*
* The selectors installed on the group tell us about the presence of
* audio/video and subtitle streams. This allows us to see if we need
* visualisation, video or/and audio.
*/
static void
no_more_pads_cb (GstElement * decodebin, GstSourceGroup * group)
{
GstPlayBin *playbin;
GstPadLinkReturn res;
gint i;
playbin = group->playbin;
GST_DEBUG_OBJECT (playbin, "no more pads in group %p", group);
for (i = 0; i < GST_PLAY_SINK_TYPE_LAST; i++) {
GstSourceSelect *select = &group->selector[i];
if (select->selector) {
select->sinkpad =
gst_play_sink_request_pad (playbin->playsink, select->type);
res = gst_pad_link (select->srcpad, select->sinkpad);
GST_DEBUG_OBJECT (playbin, "linked type %s, result: %d", select->media,
res);
}
}
/* configure the modes now */
gst_play_sink_reconfigure (playbin->playsink);
}
/* send an EOS event to all of the selectors */
static void
perform_eos (GstPlayBin * playbin, GstSourceGroup * group)
{
GstEvent *event;
gint i;
GST_DEBUG_OBJECT (playbin, "doing EOS in group %p", group);
event = gst_event_new_eos ();
for (i = 0; i < GST_PLAY_SINK_TYPE_LAST; i++) {
GstSourceSelect *select = &group->selector[i];
if (select->selector) {
GST_DEBUG_OBJECT (playbin, "send EOS in selector %s", select->media);
gst_event_ref (event);
gst_pad_push_event (select->srcpad, event);
}
}
gst_event_unref (event);
}
static void
drained_cb (GstElement * decodebin, GstSourceGroup * group)
{
GstPlayBin *playbin;
playbin = group->playbin;
GST_DEBUG_OBJECT (playbin, "about to finish in group %p", group);
/* mark use as sending out the about-to-finish signal. When the app sets a URI
* when this signal is emited, we're marking it as next-uri */
playbin->about_to_finish = TRUE;
/* after this call, we should have a next group to activate or we EOS */
g_signal_emit (G_OBJECT (playbin),
gst_play_bin_signals[SIGNAL_ABOUT_TO_FINISH], 0, NULL);
playbin->about_to_finish = FALSE;
/* now activate the next group. If the app did not set a next-uri, this will
* fail and we can do EOS */
if (!setup_next_source (playbin)) {
perform_eos (playbin, group);
}
}
/* Called when we must provide a list of factories to plug to @pad with @caps.
* We first check if we have a sink that can handle the format and if we do, we
* return NULL, to expose the pad. If we have no sink (or the sink does not
* work), we return the list of elements that can connect. */
static GValueArray *
autoplug_factories_cb (GstElement * decodebin, GstPad * pad,
GstCaps * caps, GstSourceGroup * group)
{
GstPlayBin *playbin;
GValueArray *result;
playbin = group->playbin;
GST_DEBUG_OBJECT (playbin, "factories group %p for %s:%s, %" GST_PTR_FORMAT,
group, GST_DEBUG_PAD_NAME (pad), caps);
/* filter out the elements based on the caps. */
result = gst_factory_list_filter (playbin->elements, caps);
GST_DEBUG_OBJECT (playbin, "found factories %p", result);
gst_factory_list_debug (result);
return result;
}
/* We are asked to select an element. See if the next element to check
* is a sink. If this is the case, we see if the sink works by setting it to
* READY. If the sink works, we return -2 to make decodebin expose the raw pad
* so that we can setup the mixers. */
static GstAutoplugSelectResult
autoplug_select_cb (GstElement * decodebin, GstPad * pad,
GstCaps * caps, GstElementFactory * factory, GstSourceGroup * group)
{
GstPlayBin *playbin;
GstElement *element;
const gchar *klass;
playbin = group->playbin;
GST_DEBUG_OBJECT (playbin, "select group %p for %s:%s, %" GST_PTR_FORMAT,
group, GST_DEBUG_PAD_NAME (pad), caps);
GST_DEBUG_OBJECT (playbin, "checking factory %s",
GST_PLUGIN_FEATURE_NAME (factory));
/* if it's not a sink, we just make decodebin try it */
if (!gst_factory_list_is_type (factory, GST_FACTORY_LIST_SINK))
return GST_AUTOPLUG_SELECT_TRY;
/* it's a sink, see if an instance of it actually works */
GST_DEBUG_OBJECT (playbin, "we found a sink");
if ((element = gst_element_factory_create (factory, NULL)) == NULL) {
GST_WARNING_OBJECT (playbin, "Could not create an element from %s",
gst_plugin_feature_get_name (GST_PLUGIN_FEATURE (factory)));
return GST_AUTOPLUG_SELECT_SKIP;
}
/* ... activate it ... We do this before adding it to the bin so that we
* don't accidentally make it post error messages that will stop
* everything. */
if ((gst_element_set_state (element,
GST_STATE_READY)) == GST_STATE_CHANGE_FAILURE) {
GST_WARNING_OBJECT (playbin, "Couldn't set %s to READY",
GST_ELEMENT_NAME (element));
gst_object_unref (element);
return GST_AUTOPLUG_SELECT_SKIP;
}
/* at this point, we have the sink working, configure it in playsink */
klass = gst_element_factory_get_klass (factory);
/* get klass to figure out if it's audio or video */
if (strstr (klass, "Audio")) {
GST_DEBUG_OBJECT (playbin, "configure audio sink");
gst_play_sink_set_audio_sink (playbin->playsink, element);
} else if (strstr (klass, "Video")) {
GST_DEBUG_OBJECT (playbin, "configure video sink");
gst_play_sink_set_video_sink (playbin->playsink, element);
} else {
GST_WARNING_OBJECT (playbin, "unknown sink klass %s found", klass);
}
/* tell decodebin to expose the pad because we are going to use this
* sink */
GST_DEBUG_OBJECT (playbin, "we found a working sink, expose pad");
return GST_AUTOPLUG_SELECT_EXPOSE;
}
static gboolean
activate_group (GstPlayBin * playbin, GstSourceGroup * group)
{
GstElement *uridecodebin;
g_return_val_if_fail (group->valid, FALSE);
g_return_val_if_fail (!group->active, FALSE);
if (group->uridecodebin) {
gst_element_set_state (group->uridecodebin, GST_STATE_NULL);
gst_bin_remove (GST_BIN_CAST (playbin), group->uridecodebin);
group->uridecodebin = NULL;
}
uridecodebin = gst_element_factory_make ("uridecodebin", NULL);
if (!uridecodebin)
goto no_decodebin;
/* configure connection speed */
g_object_set (uridecodebin, "connection-speed", playbin->connection_speed,
NULL);
/* configure uri */
g_object_set (uridecodebin, "uri", group->uri, NULL);
/* connect pads and other things */
g_signal_connect (uridecodebin, "pad-added", G_CALLBACK (pad_added_cb),
group);
g_signal_connect (uridecodebin, "pad-removed", G_CALLBACK (pad_removed_cb),
group);
g_signal_connect (uridecodebin, "no-more-pads", G_CALLBACK (no_more_pads_cb),
group);
/* is called when the uridecodebin is out of data and we can switch to the
* next uri */
g_signal_connect (uridecodebin, "drained", G_CALLBACK (drained_cb), group);
/* will be called when a new media type is found. We return a list of decoders
* including sinks for decodebin to try */
g_signal_connect (uridecodebin, "autoplug-factories",
G_CALLBACK (autoplug_factories_cb), group);
g_signal_connect (uridecodebin, "autoplug-select",
G_CALLBACK (autoplug_select_cb), group);
/* */
gst_bin_add (GST_BIN_CAST (playbin), uridecodebin);
group->uridecodebin = uridecodebin;
gst_element_set_state (uridecodebin, GST_STATE_PAUSED);
group->active = TRUE;
return TRUE;
/* ERRORS */
no_decodebin:
{
return FALSE;
}
}
/* unlink a group of uridecodebins from the sink */
static gboolean
deactivate_group (GstPlayBin * playbin, GstSourceGroup * group)
{
gint i;
g_return_val_if_fail (group->valid, FALSE);
g_return_val_if_fail (group->active, FALSE);
GST_DEBUG_OBJECT (playbin, "unlinking group %p", group);
for (i = 0; i < GST_PLAY_SINK_TYPE_LAST; i++) {
GstSourceSelect *select = &group->selector[i];
if (!select->selector)
continue;
GST_DEBUG_OBJECT (playbin, "unlinking selector %s", select->media);
gst_pad_unlink (select->srcpad, select->sinkpad);
/* release back */
gst_play_sink_release_pad (playbin->playsink, select->sinkpad);
select->sinkpad = NULL;
gst_object_unref (select->srcpad);
select->srcpad = NULL;
gst_element_set_state (select->selector, GST_STATE_NULL);
gst_bin_remove (GST_BIN_CAST (playbin), select->selector);
select->selector = NULL;
}
group->active = FALSE;
return TRUE;
}
/* setup the next group to play, this assumes the next_group is valid and
* configured. It swaps out the current_group and activates the valid
* next_group. */
static gboolean
setup_next_source (GstPlayBin * playbin)
{
GstSourceGroup *new_group, *old_group;
GST_DEBUG_OBJECT (playbin, "setup sources");
/* see if there is a next group */
new_group = playbin->next_group;
if (!new_group || !new_group->valid)
goto no_next_group;
/* first unlink the current source, if any */
old_group = playbin->curr_group;
if (old_group && old_group->valid) {
/* unlink our pads with the sink */
deactivate_group (playbin, old_group);
old_group->valid = FALSE;
}
/* activate the new group */
if (!activate_group (playbin, new_group))
goto activate_failed;
/* swap old and new */
playbin->curr_group = new_group;
playbin->next_group = old_group;
return TRUE;
/* ERRORS */
no_next_group:
{
GST_DEBUG_OBJECT (playbin, "no next group");
return FALSE;
}
activate_failed:
{
GST_DEBUG_OBJECT (playbin, "activate failed");
return FALSE;
}
}
/* The group that is currently playing is copied again to the
* next_group.
*/
static gboolean
save_current_group (GstPlayBin * playbin)
{
GstSourceGroup *curr_group;
GST_DEBUG_OBJECT (playbin, "save current group");
/* see if there is a current group */
curr_group = playbin->curr_group;
if (curr_group && curr_group->valid) {
/* unlink our pads with the sink */
deactivate_group (playbin, curr_group);
}
/* swap old and new */
playbin->curr_group = playbin->next_group;
playbin->next_group = curr_group;
return TRUE;
}
static GstStateChangeReturn
gst_play_bin_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
GstPlayBin *playbin;
playbin = GST_PLAY_BIN (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
if (!setup_next_source (playbin))
goto source_failed;
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:
break;
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
/* FIXME Release audio device when we implement that */
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
save_current_group (playbin);
break;
default:
break;
}
return ret;
/* ERRORS */
source_failed:
{
return GST_STATE_CHANGE_FAILURE;
}
}
#ifdef __SYMBIAN32__
EXPORT_C
#endif
gboolean
gst_play_bin2_plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (gst_play_bin_debug, "playbin2", 0, "play bin");
return gst_element_register (plugin, "playbin2", GST_RANK_NONE,
GST_TYPE_PLAY_BIN);
}