gstplaybin3.c 173 KB
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/* GStreamer
 * Copyright (C) <2007> Wim Taymans <wim.taymans@gmail.com>
 * Copyright (C) <2011> Sebastian Dröge <sebastian.droege@collabora.co.uk>
 * Copyright (C) <2013> Collabora Ltd.
 *   Author: Sebastian Dröge <sebastian.droege@collabora.co.uk>
 * Copyright (C) <2015> Jan Schmidt <jan@centricular.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., 51 Franklin St, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

/**
 * SECTION:element-playbin3
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 * @title: playbin3
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 *
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 * playbin3 provides a stand-alone everything-in-one abstraction for an
 * audio and/or video player. It differs from the previous playbin (playbin2)
 * by supporting publication and selection of available streams via the
 * #GstStreamCollection message and #GST_EVENT_SELECT_STREAMS event API.
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 *
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 * <emphasis>playbin3 is still experimental API and a technology preview.
 * Its behaviour and exposed API is subject to change.</emphasis>
 *
 * playbin3 can handle both audio and video files and features
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 *
 * * automatic file type recognition and based on that automatic
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 * selection and usage of the right audio/video/subtitle demuxers/decoders
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 *
 * * auxilliary files - such as external subtitles and audio tracks
 * * visualisations for audio files
 * * subtitle support for video files. Subtitles can be store in external
 *   files.
 * * stream selection between different video/audio/subtitles streams
 * * meta info (tag) extraction
 * * easy access to the last video sample
 * * buffering when playing streams over a network
 * * volume control with mute option
 *
 * ## Usage
 *
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 * A playbin element can be created just like any other element using
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 * gst_element_factory_make(). The file/URI to play should be set via the #GstPlayBin3: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
 *
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 * Playbin3 is a #GstPipeline. It will notify the application of everything
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 * 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.
 *
 * 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.
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 * Applications using playbin3 should ideally be written to deal with things
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 * completely asynchroneous.
 *
 * 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
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 * the user wants to play a different track, playbin3 should be set back to
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 * READY or NULL state, then the #GstPlayBin3:uri property should be set to the
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 * new location and then playbin3 be set to PLAYING state again.
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 *
 * Seeking can be done using gst_element_seek_simple() or gst_element_seek()
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 * on the playbin3 element. Again, the seek will not be executed
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 * 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.
 *
 * 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.
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 *
 * ## Advanced Usage: specifying the audio and video sink
 *
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 * By default, if no audio sink or video sink has been specified via the
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 * #GstPlayBin3:audio-sink or #GstPlayBin3:video-sink property, playbin3 will use the autoaudiosink
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 * 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.
 *
 * 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
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 * using gst_element_factory_make()) and provide them to playbin3 using the
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 * #GstPlayBin3:audio-sink or #GstPlayBin3:video-sink property.
 *
 * GNOME-based applications, for example, will usually want to create
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 * gconfaudiosink and gconfvideosink elements and make playbin3 use those,
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 * so that output happens to whatever the user has configured in the GNOME
 * Multimedia System Selector configuration dialog.
 *
 * The sink elements do not necessarily need to be ready-made sinks. It is
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 * possible to create container elements that look like a sink to playbin3,
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 * 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.
 *
 * 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!).
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 *
 * ## Retrieving Tags and Other Meta Data
 *
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 * Most of the common meta data (artist, title, etc.) can be retrieved by
 * watching for TAG messages on the pipeline's bus (see above).
 *
 * Other more specific meta information like width/height/framerate of video
 * streams or samplerate/number of channels of audio streams can be obtained
 * from the negotiated caps on the sink pads of the sinks.
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 *
 * ## Buffering
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 * Playbin3 handles buffering automatically for the most part, but applications
 * need to handle parts of the buffering process as well. Whenever playbin3 is
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 * buffering, it will post BUFFERING messages on the bus with a percentage
 * value that shows the progress of the buffering process. Applications need
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 * to set playbin3 to PLAYING or PAUSED state in response to these messages.
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 * 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:
 * |[
 * 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;
 *   }
 *   ...
 * }
 * ]|
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 *
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 * 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).
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 *
 * ## Embedding the video window in your application
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 * By default, playbin3 (or rather the video sinks used) will create their own
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 * window. Applications will usually want to force output to a window of their
 * own, however. This can be done using the #GstVideoOverlay interface, which most
 * video sinks implement. See the documentation there for more details.
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 *
 * ## Specifying which CD/DVD device to use
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 *
 * The device to use for CDs/DVDs needs to be set on the source element playbin3
 * creates before it is opened. The most generic way of doing this is to connect
 * to playbin3's "source-setup" signal, which will be emitted by playbin3 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 some cases the device can also be set as part of the
 * URI, but it depends on the elements involved if this will work or not. For
 * example, for DVD menu playback, the following syntax might work (if the
 * resindvd plugin is used): dvd://[/path/to/device]
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 *
 * ## Handling redirects
 *
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 * Some elements may post 'redirect' messages on the bus to tell the
 * application to open another location. These are element messages containing
 * a structure named 'redirect' along with a 'new-location' field of string
 * type. The new location may be a relative or an absolute URI. Examples
 * for such redirects can be found in many quicktime movie trailers.
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 *
 * ## Examples
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 * |[
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 * gst-launch-1.0 -v playbin3 uri=file:///path/to/somefile.mp4
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 * ]|
 *  This will play back the given AVI video file, given that the video and
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 * audio decoders required to decode the content are installed. Since no
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 * special audio sink or video sink is supplied (via playbin3's audio-sink or
 * video-sink properties) playbin3 will try to find a suitable audio and
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 * video sink automatically using the autoaudiosink and autovideosink elements.
 * |[
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 * gst-launch-1.0 -v playbin3 uri=cdda://4
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 * ]|
 *  This will play back track 4 on an audio CD in your disc drive (assuming
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 * the drive is detected automatically by the plugin).
 * |[
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 * gst-launch-1.0 -v playbin3 uri=dvd://
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 * ]|
 *  This will play back the DVD in your disc drive (assuming
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 * the drive is detected automatically by the plugin).
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 *
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 */

/* FIXME 0.11: suppress warnings for deprecated API such as GValueArray
 * with newer GLib versions (>= 2.31.0) */
#define GLIB_DISABLE_DEPRECATION_WARNINGS

#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 <gst/audio/streamvolume.h>
#include <gst/video/video-info.h>
#include <gst/video/video-multiview.h>
#include <gst/video/videooverlay.h>
#include <gst/video/navigation.h>
#include <gst/video/colorbalance.h>
#include "gstplay-enum.h"
#include "gstplayback.h"
#include "gstplaysink.h"
#include "gstsubtitleoverlay.h"
#include "gstplaybackutils.h"

GST_DEBUG_CATEGORY_STATIC (gst_play_bin3_debug);
#define GST_CAT_DEFAULT gst_play_bin3_debug

#define GST_TYPE_PLAY_BIN               (gst_play_bin3_get_type())
#define GST_PLAY_BIN3(obj)               (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_PLAY_BIN,GstPlayBin3))
#define GST_PLAY_BIN3_CLASS(klass)       (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_PLAY_BIN,GstPlayBin3Class))
#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 ULONG_TO_POINTER(number)        ((gpointer) (guintptr) (number))
#define POINTER_TO_ULONG(number)        ((guintptr) (number))

#define VOLUME_MAX_DOUBLE 10.0

typedef struct _GstPlayBin3 GstPlayBin3;
typedef struct _GstPlayBin3Class GstPlayBin3Class;
typedef struct _GstSourceGroup GstSourceGroup;
typedef struct _GstSourceCombine GstSourceCombine;

typedef GstCaps *(*SourceCombineGetMediaCapsFunc) (void);

/* has the info for a combiner and provides the link to the sink */
struct _GstSourceCombine
{
  const gchar *media_type;      /* the media type for the combiner */
  SourceCombineGetMediaCapsFunc get_media_caps; /* more complex caps for the combiner */
  GstPlaySinkType type;         /* the sink pad type of the combiner */

  GstElement *combiner;         /* the combiner */
  GPtrArray *channels;
  GstPad *srcpad;               /* the source pad of the combiner */
  GstPad *sinkpad;              /* the sinkpad of the sink when the combiner
                                 * is linked
                                 */
  gulong block_id;

  GPtrArray *streams;           /* Sorted array of GstStream for the given type */
  gint current_stream;          /* Currently selected GstStream */

  gboolean has_active_pad;      /* stream combiner has the "active-pad" property */

  gboolean has_always_ok;       /* stream combiner's sink pads have the "always-ok" property */
};

#define GST_SOURCE_GROUP_GET_LOCK(group) (&((GstSourceGroup*)(group))->lock)
#define GST_SOURCE_GROUP_LOCK(group) (g_mutex_lock (GST_SOURCE_GROUP_GET_LOCK(group)))
#define GST_SOURCE_GROUP_UNLOCK(group) (g_mutex_unlock (GST_SOURCE_GROUP_GET_LOCK(group)))

enum
{
  PLAYBIN_STREAM_AUDIO = 0,
  PLAYBIN_STREAM_VIDEO,
  PLAYBIN_STREAM_TEXT,
  PLAYBIN_STREAM_LAST
};

/* names matching the enum above */
static const gchar *stream_type_names[] = {
  "audio", "video", "text"
};

static void avelements_free (gpointer data);
static GSequence *avelements_create (GstPlayBin3 * playbin,
    gboolean isaudioelement);

/* The GstAudioVideoElement structure holding the audio/video decoder
 * and the audio/video sink factories together with field indicating
 * the number of common caps features */
typedef struct
{
  GstElementFactory *dec;       /* audio:video decoder */
  GstElementFactory *sink;      /* audio:video sink */
  guint n_comm_cf;              /* number of common caps features */
} GstAVElement;

/* a structure to hold the objects for decoding a uri and the subtitle uri
 */
struct _GstSourceGroup
{
  GstPlayBin3 *playbin;

  GMutex lock;

  gboolean valid;               /* the group has valid info to start playback */
  gboolean active;              /* the group is active */

  /* properties */
  gchar *uri;
  gchar *suburi;
  GValueArray *streaminfo;

  /* urisourcebins for uri and subtitle uri */
  /* FIXME: Just make this an array of uris */
  GstElement *urisourcebin;
  GstElement *suburisourcebin;

  /* Active sinks for each media type. These are initialized with
   * the configured or currently used sink, otherwise
   * left as NULL and playbin tries to automatically
   * select a good sink */
  GstElement *audio_sink;
  GstElement *video_sink;
  GstElement *text_sink;

  gint pending;
  gboolean sub_pending;

  /* primary uri signals */
  gulong urisrc_pad_added_id;
  gulong urisrc_pad_removed_id;
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  gulong urisrc_source_setup_id;
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  gulong autoplug_factories_id;
  gulong autoplug_select_id;
  gulong autoplug_continue_id;
  gulong autoplug_query_id;

  /* subtitle uri signals */
  gulong sub_pad_added_id;
  gulong sub_pad_removed_id;
  gulong sub_autoplug_continue_id;
  gulong sub_autoplug_query_id;

  gulong block_id;

  GMutex stream_changed_pending_lock;
  gboolean stream_changed_pending;

  /* buffering message stored for after switching */
  GstMessage *pending_buffering_msg;
};

#define GST_PLAY_BIN3_GET_LOCK(bin) (&((GstPlayBin3*)(bin))->lock)
#define GST_PLAY_BIN3_LOCK(bin) (g_rec_mutex_lock (GST_PLAY_BIN3_GET_LOCK(bin)))
#define GST_PLAY_BIN3_UNLOCK(bin) (g_rec_mutex_unlock (GST_PLAY_BIN3_GET_LOCK(bin)))

/* lock to protect dynamic callbacks, like no-more-pads */
#define GST_PLAY_BIN3_DYN_LOCK(bin)    g_mutex_lock (&(bin)->dyn_lock)
#define GST_PLAY_BIN3_DYN_UNLOCK(bin)  g_mutex_unlock (&(bin)->dyn_lock)

/* lock for shutdown */
#define GST_PLAY_BIN3_SHUTDOWN_LOCK(bin,label)           \
G_STMT_START {                                          \
  if (G_UNLIKELY (g_atomic_int_get (&bin->shutdown)))   \
    goto label;                                         \
  GST_PLAY_BIN3_DYN_LOCK (bin);                          \
  if (G_UNLIKELY (g_atomic_int_get (&bin->shutdown))) { \
    GST_PLAY_BIN3_DYN_UNLOCK (bin);                      \
    goto label;                                         \
  }                                                     \
} G_STMT_END

/* unlock for shutdown */
#define GST_PLAY_BIN3_SHUTDOWN_UNLOCK(bin)         \
  GST_PLAY_BIN3_DYN_UNLOCK (bin);                  \

/**
 * GstPlayBin3:
 *
 * playbin element structure
 */
struct _GstPlayBin3
{
  GstPipeline parent;

  GRecMutex lock;               /* to protect group switching */

  /* the input 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 */

  /* combiners for different streams */
  GPtrArray *channels[PLAYBIN_STREAM_LAST];     /* links to combiner pads */
  GstSourceCombine combiner[PLAYBIN_STREAM_LAST];

  /* A global decodebin3 that's used to actually do decoding */
  gboolean decodebin_active;
  GstElement *decodebin;
  /* Bit-wise set of stream types we have
   * requested from decodebin vs stream types
   * decodebin has provided */
  GstStreamType selected_stream_types;
  GstStreamType active_stream_types;

  /* Decodebin signals */
  gulong db_pad_added_id;
  gulong db_pad_removed_id;
  gulong db_no_more_pads_id;
  gulong db_drained_id;
  gulong db_select_stream_id;

  /* properties */
  guint64 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 */

  gboolean do_stream_selections;        /* Set to TRUE when any of current-{video|audio|text} are set to
                                           say playbin should do backwards-compatibility behaviours */

  guint64 buffer_duration;      /* When buffering, the max buffer duration (ns) */
  guint buffer_size;            /* When buffering, the max buffer size (bytes) */
  gboolean force_aspect_ratio;

  /* Multiview/stereoscopic overrides */
  GstVideoMultiviewFramePacking multiview_mode;
  GstVideoMultiviewFlags multiview_flags;

  /* our play sink */
  GstPlaySink *playsink;


  /* lock protecting dynamic adding/removing */
  GMutex dyn_lock;
  /* if we are shutting down or not */
  gint shutdown;
  gboolean async_pending;       /* async-start has been emitted */

  GMutex elements_lock;
  guint32 elements_cookie;
  GList *elements;              /* factories we can use for selecting elements */

  gboolean have_selector;       /* set to FALSE when we fail to create an
                                 * input-selector, so that we only post a
                                 * warning once */

  gboolean video_pending_flush_finish;  /* whether we are pending to send a custom
                                         * custom-video-flush-finish event
                                         * on pad activation */
  gboolean audio_pending_flush_finish;  /* whether we are pending to send a custom
                                         * custom-audio-flush-finish event
                                         * on pad activation */
  gboolean text_pending_flush_finish;   /* whether we are pending to send a custom
                                         * custom-subtitle-flush-finish event
                                         * on pad activation */

  GstElement *audio_sink;       /* configured audio sink, or NULL      */
  GstElement *video_sink;       /* configured video sink, or NULL      */
  GstElement *text_sink;        /* configured text sink, or NULL       */

  GstElement *audio_stream_combiner;    /* configured audio stream combiner, or NULL */
  GstElement *video_stream_combiner;    /* configured video stream combiner, or NULL */
  GstElement *text_stream_combiner;     /* configured text stream combiner, or NULL */

  GSequence *aelements;         /* a list of GstAVElements for audio stream */
  GSequence *velements;         /* a list of GstAVElements for video stream */

  struct
  {
    gboolean valid;
    GstFormat format;
    gint64 duration;
  } duration[5];                /* cached durations */

  guint64 ring_buffer_max_size; /* 0 means disabled */

  /* Active stream collection */
  GstStreamCollection *collection;
};

struct _GstPlayBin3Class
{
  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) (GstPlayBin3 * playbin);

  /* get the last video sample and convert it to the given caps */
  GstSample *(*convert_sample) (GstPlayBin3 * playbin, GstCaps * caps);
};

/* props */
#define DEFAULT_URI               NULL
#define DEFAULT_SUBURI            NULL
#define DEFAULT_FLAGS             GST_PLAY_FLAG_AUDIO | GST_PLAY_FLAG_VIDEO | GST_PLAY_FLAG_TEXT | \
                                  GST_PLAY_FLAG_SOFT_VOLUME | GST_PLAY_FLAG_DEINTERLACE | \
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                                  GST_PLAY_FLAG_SOFT_COLORBALANCE | GST_PLAY_FLAG_BUFFERING
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#define DEFAULT_CURRENT_VIDEO     -1
#define DEFAULT_CURRENT_AUDIO     -1
#define DEFAULT_CURRENT_TEXT      -1
#define DEFAULT_AUTO_SELECT_STREAMS TRUE
#define DEFAULT_SUBTITLE_ENCODING NULL
#define DEFAULT_AUDIO_SINK        NULL
#define DEFAULT_VIDEO_SINK        NULL
#define DEFAULT_VIS_PLUGIN        NULL
#define DEFAULT_TEXT_SINK         NULL
#define DEFAULT_VOLUME            1.0
#define DEFAULT_MUTE              FALSE
#define DEFAULT_FRAME             NULL
#define DEFAULT_FONT_DESC         NULL
#define DEFAULT_CONNECTION_SPEED  0
#define DEFAULT_BUFFER_DURATION   -1
#define DEFAULT_BUFFER_SIZE       -1
#define DEFAULT_RING_BUFFER_MAX_SIZE 0

enum
{
  PROP_0,
  PROP_URI,
  PROP_CURRENT_URI,
  PROP_SUBURI,
  PROP_CURRENT_SUBURI,
  PROP_FLAGS,
  PROP_SUBTITLE_ENCODING,
  PROP_AUDIO_SINK,
  PROP_VIDEO_SINK,
  PROP_VIS_PLUGIN,
  PROP_TEXT_SINK,
  PROP_VIDEO_STREAM_COMBINER,
  PROP_AUDIO_STREAM_COMBINER,
  PROP_TEXT_STREAM_COMBINER,
  PROP_VOLUME,
  PROP_MUTE,
  PROP_SAMPLE,
  PROP_FONT_DESC,
  PROP_CONNECTION_SPEED,
  PROP_BUFFER_SIZE,
  PROP_BUFFER_DURATION,
  PROP_AV_OFFSET,
  PROP_RING_BUFFER_MAX_SIZE,
  PROP_FORCE_ASPECT_RATIO,
  PROP_AUDIO_FILTER,
  PROP_VIDEO_FILTER,
  PROP_MULTIVIEW_MODE,
  PROP_MULTIVIEW_FLAGS
};

/* signals */
enum
{
  SIGNAL_ABOUT_TO_FINISH,
  SIGNAL_CONVERT_SAMPLE,
  SIGNAL_SOURCE_SETUP,
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  SIGNAL_ELEMENT_SETUP,
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  LAST_SIGNAL
};

static GstStaticCaps raw_audio_caps = GST_STATIC_CAPS ("audio/x-raw(ANY)");
static GstStaticCaps raw_video_caps = GST_STATIC_CAPS ("video/x-raw(ANY)");

static void gst_play_bin3_class_init (GstPlayBin3Class * klass);
static void gst_play_bin3_init (GstPlayBin3 * playbin);
static void gst_play_bin3_finalize (GObject * object);

static void gst_play_bin3_set_property (GObject * object, guint prop_id,
    const GValue * value, GParamSpec * spec);
static void gst_play_bin3_get_property (GObject * object, guint prop_id,
    GValue * value, GParamSpec * spec);

static GstStateChangeReturn gst_play_bin3_change_state (GstElement * element,
    GstStateChange transition);

static void gst_play_bin3_handle_message (GstBin * bin, GstMessage * message);
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static void gst_play_bin3_deep_element_added (GstBin * playbin,
    GstBin * sub_bin, GstElement * child);
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static gboolean gst_play_bin3_query (GstElement * element, GstQuery * query);
static gboolean gst_play_bin3_send_event (GstElement * element,
    GstEvent * event);

static GstSample *gst_play_bin3_convert_sample (GstPlayBin3 * playbin,
    GstCaps * caps);

static GstStateChangeReturn setup_next_source (GstPlayBin3 * playbin,
    GstState target);

static void no_more_pads_cb (GstElement * decodebin, GstPlayBin3 * playbin);
static void pad_removed_cb (GstElement * decodebin, GstPad * pad,
    GstPlayBin3 * playbin);

static gint select_stream_cb (GstElement * decodebin,
    GstStreamCollection * collection, GstStream * stream,
    GstPlayBin3 * playbin);

static void do_stream_selection (GstPlayBin3 * playbin);

static GstElementClass *parent_class;

static guint gst_play_bin3_signals[LAST_SIGNAL] = { 0 };

#define REMOVE_SIGNAL(obj,id)            \
if (id) {                                \
  g_signal_handler_disconnect (obj, id); \
  id = 0;                                \
}

static void gst_play_bin3_overlay_init (gpointer g_iface,
    gpointer g_iface_data);
static void gst_play_bin3_navigation_init (gpointer g_iface,
    gpointer g_iface_data);
static void gst_play_bin3_colorbalance_init (gpointer g_iface,
    gpointer g_iface_data);

static GType
gst_play_bin3_get_type (void)
{
  static GType gst_play_bin3_type = 0;

  if (!gst_play_bin3_type) {
    static const GTypeInfo gst_play_bin3_info = {
      sizeof (GstPlayBin3Class),
      NULL,
      NULL,
      (GClassInitFunc) gst_play_bin3_class_init,
      NULL,
      NULL,
      sizeof (GstPlayBin3),
      0,
      (GInstanceInitFunc) gst_play_bin3_init,
      NULL
    };
    static const GInterfaceInfo svol_info = {
      NULL, NULL, NULL
    };
    static const GInterfaceInfo ov_info = {
      gst_play_bin3_overlay_init,
      NULL, NULL
    };
    static const GInterfaceInfo nav_info = {
      gst_play_bin3_navigation_init,
      NULL, NULL
    };
    static const GInterfaceInfo col_info = {
      gst_play_bin3_colorbalance_init,
      NULL, NULL
    };

    gst_play_bin3_type = g_type_register_static (GST_TYPE_PIPELINE,
        "GstPlayBin3", &gst_play_bin3_info, 0);

    g_type_add_interface_static (gst_play_bin3_type, GST_TYPE_STREAM_VOLUME,
        &svol_info);
    g_type_add_interface_static (gst_play_bin3_type, GST_TYPE_VIDEO_OVERLAY,
        &ov_info);
    g_type_add_interface_static (gst_play_bin3_type, GST_TYPE_NAVIGATION,
        &nav_info);
    g_type_add_interface_static (gst_play_bin3_type, GST_TYPE_COLOR_BALANCE,
        &col_info);
  }

  return gst_play_bin3_type;
}

static void
gst_play_bin3_class_init (GstPlayBin3Class * 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_bin3_set_property;
  gobject_klass->get_property = gst_play_bin3_get_property;

  gobject_klass->finalize = gst_play_bin3_finalize;

  /**
   * GstPlayBin3: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 | G_PARAM_STATIC_STRINGS));

   /**
   * GstPlayBin3:current-uri
   *
   * The currently playing uri.
   */
  g_object_class_install_property (gobject_klass, PROP_CURRENT_URI,
      g_param_spec_string ("current-uri", "Current URI",
          "The currently playing URI", NULL,
          G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));

  /**
   * GstPlayBin3: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_PARAM_STATIC_STRINGS));

  /**
   * GstPlayBin3:current-suburi
   *
   * The currently playing subtitle uri.
   */
  g_object_class_install_property (gobject_klass, PROP_CURRENT_SUBURI,
      g_param_spec_string ("current-suburi", "Current .sub-URI",
          "The currently playing URI of a subtitle",
          NULL, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));

  /**
   * GstPlayBin3: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 | G_PARAM_STATIC_STRINGS));

  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_PARAM_STATIC_STRINGS));

  g_object_class_install_property (gobject_klass, PROP_VIDEO_FILTER,
      g_param_spec_object ("video-filter", "Video filter",
          "the video filter(s) to apply, if possible",
          GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
  g_object_class_install_property (gobject_klass, PROP_AUDIO_FILTER,
      g_param_spec_object ("audio-filter", "Audio filter",
          "the audio filter(s) to apply, if possible",
          GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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  /**
   * GstPlayBin3:video-sink
   *
   * Get or set the video sink to use for video output. If set to
   * NULL, one will be auto-selected. To disable video entirely, unset
   * the VIDEO flag in the #GstPlayBin3:flags property.
   *
   */
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  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_PARAM_STATIC_STRINGS));
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  /**
   * GstPlayBin3:audio-sink
   *
   * Get or set the audio sink to use for audio output. If set to
   * NULL, one will be auto-selected. To disable audio entirely, unset
   * the AUDIO flag in the #GstPlayBin3:flags property.
   *
   */
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  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_PARAM_STATIC_STRINGS));
  g_object_class_install_property (gobject_klass, PROP_VIS_PLUGIN,
      g_param_spec_object ("vis-plugin", "Vis plugin",
          "the visualization element to use (NULL = default)",
          GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
  g_object_class_install_property (gobject_klass, PROP_TEXT_SINK,
      g_param_spec_object ("text-sink", "Text plugin",
          "the text output element to use (NULL = default subtitleoverlay)",
          GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
  /**
   * GstPlayBin3:video-stream-combiner
   *
   * Get or set the current video stream combiner. By default, an input-selector
   * is created and deleted as-needed.
   */
  g_object_class_install_property (gobject_klass, PROP_VIDEO_STREAM_COMBINER,
      g_param_spec_object ("video-stream-combiner", "Video stream combiner",
          "Current video stream combiner (NULL = input-selector)",
          GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
  /**
   * GstPlayBin3:audio-stream-combiner
   *
   * Get or set the current audio stream combiner. By default, an input-selector
   * is created and deleted as-needed.
   */
  g_object_class_install_property (gobject_klass, PROP_AUDIO_STREAM_COMBINER,
      g_param_spec_object ("audio-stream-combiner", "Audio stream combiner",
          "Current audio stream combiner (NULL = input-selector)",
          GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
  /**
   * GstPlayBin3:text-stream-combiner
   *
   * Get or set the current text stream combiner. By default, an input-selector
   * is created and deleted as-needed.
   */
  g_object_class_install_property (gobject_klass, PROP_TEXT_STREAM_COMBINER,
      g_param_spec_object ("text-stream-combiner", "Text stream combiner",
          "Current text stream combiner (NULL = input-selector)",
          GST_TYPE_ELEMENT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

  /**
   * GstPlayBin3:volume:
   *
   * Get or set the current audio stream volume. 1.0 means 100%,
   * 0.0 means mute. This uses a linear volume scale.
   *
   */
  g_object_class_install_property (gobject_klass, PROP_VOLUME,
      g_param_spec_double ("volume", "Volume", "The audio volume, 1.0=100%",
          0.0, VOLUME_MAX_DOUBLE, 1.0,
          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
  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 | G_PARAM_STATIC_STRINGS));

  /**
   * GstPlayBin3:sample:
   * @playbin: a #GstPlayBin3
   *
   * Get the currently rendered or prerolled sample in the video sink.
   * The #GstCaps in the sample will describe the format of the buffer.
   */
  g_object_class_install_property (gobject_klass, PROP_SAMPLE,
      g_param_spec_boxed ("sample", "Sample",
          "The last sample (NULL = no video available)",
          GST_TYPE_SAMPLE, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));

  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_PARAM_STATIC_STRINGS));

  g_object_class_install_property (gobject_klass, PROP_CONNECTION_SPEED,
      g_param_spec_uint64 ("connection-speed", "Connection Speed",
          "Network connection speed in kbps (0 = unknown)",
          0, G_MAXUINT64 / 1000, DEFAULT_CONNECTION_SPEED,
          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

  g_object_class_install_property (gobject_klass, PROP_BUFFER_SIZE,
      g_param_spec_int ("buffer-size", "Buffer size (bytes)",
          "Buffer size when buffering network streams",
          -1, G_MAXINT, DEFAULT_BUFFER_SIZE,
          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
  g_object_class_install_property (gobject_klass, PROP_BUFFER_DURATION,
      g_param_spec_int64 ("buffer-duration", "Buffer duration (ns)",
          "Buffer duration when buffering network streams",
          -1, G_MAXINT64, DEFAULT_BUFFER_DURATION,
          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
  /**
   * GstPlayBin3:av-offset:
   *
   * Control the synchronisation offset between the audio and video streams.
   * Positive values make the audio ahead of the video and negative values make
   * the audio go behind the video.
   */
  g_object_class_install_property (gobject_klass, PROP_AV_OFFSET,
      g_param_spec_int64 ("av-offset", "AV Offset",
          "The synchronisation offset between audio and video in nanoseconds",
          G_MININT64, G_MAXINT64, 0,
          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

  /**
   * GstPlayBin3:ring-buffer-max-size
   *
   * The maximum size of the ring buffer in bytes. If set to 0, the ring
   * buffer is disabled. Default 0.
   */
  g_object_class_install_property (gobject_klass, PROP_RING_BUFFER_MAX_SIZE,
      g_param_spec_uint64 ("ring-buffer-max-size",
          "Max. ring buffer size (bytes)",
          "Max. amount of data in the ring buffer (bytes, 0 = ring buffer disabled)",
          0, G_MAXUINT, DEFAULT_RING_BUFFER_MAX_SIZE,
          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

  /**
   * GstPlayBin3::force-aspect-ratio:
   *
   * Requests the video sink to enforce the video display aspect ratio.
   */
  g_object_class_install_property (gobject_klass, PROP_FORCE_ASPECT_RATIO,
      g_param_spec_boolean ("force-aspect-ratio", "Force Aspect Ratio",
          "When enabled, scaling will respect original aspect ratio", TRUE,
          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

  /**
   * GstPlayBin3::video-multiview-mode:
   *
   * Set the stereoscopic mode for video streams that don't contain
   * any information in the stream, so they can be correctly played
   * as 3D streams. If a video already has multiview information
   * encoded, this property can override other modes in the set,
   * but cannot be used to re-interpret MVC or mixed-mono streams.
   *
   * See Also: The #GstPlayBin3::video-multiview-flags property
   *
   */
  g_object_class_install_property (gobject_klass, PROP_MULTIVIEW_MODE,
      g_param_spec_enum ("video-multiview-mode",
          "Multiview Mode Override",
          "Re-interpret a video stream as one of several frame-packed stereoscopic modes.",
          GST_TYPE_VIDEO_MULTIVIEW_FRAME_PACKING,
          GST_VIDEO_MULTIVIEW_FRAME_PACKING_NONE,
          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

  /**
   * GstPlayBin3::video-multiview-flags:
   *
   * When overriding the multiview mode of an input stream,
   * these flags modify details of the view layout.
   *
   * See Also: The #GstPlayBin3::video-multiview-mode property
   */
  g_object_class_install_property (gobject_klass, PROP_MULTIVIEW_FLAGS,
      g_param_spec_flags ("video-multiview-flags",
          "Multiview Flags Override",
          "Override details of the multiview frame layout",
          GST_TYPE_VIDEO_MULTIVIEW_FLAGS, GST_VIDEO_MULTIVIEW_FLAGS_NONE,
          G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

  /**
   * GstPlayBin3::about-to-finish
   * @playbin: a #GstPlayBin3
   *
   * This signal is emitted when the current uri is about to finish. You can
   * set the uri and suburi to make sure that playback continues.
   *
   * This signal is emitted from the context of a GStreamer streaming thread.
   */
  gst_play_bin3_signals[SIGNAL_ABOUT_TO_FINISH] =
      g_signal_new ("about-to-finish", G_TYPE_FROM_CLASS (klass),
      G_SIGNAL_RUN_LAST,
      G_STRUCT_OFFSET (GstPlayBin3Class, about_to_finish), NULL, NULL,
      g_cclosure_marshal_generic, G_TYPE_NONE, 0, G_TYPE_NONE);


  /**
   * GstPlayBin3::source-setup:
   * @playbin: a #GstPlayBin3
   * @source: source element
   *
   * This signal is emitted after the source element has been created, so
   * it can be configured by setting additional properties (e.g. set a
   * proxy server for an http source, or set the device and read speed for
   * an audio cd source). This is functionally equivalent to connecting to
   * the notify::source signal, but more convenient.
   *
   * This signal is usually emitted from the context of a GStreamer streaming
   * thread.
   */
  gst_play_bin3_signals[SIGNAL_SOURCE_SETUP] =
      g_signal_new ("source-setup", G_TYPE_FROM_CLASS (klass),
      G_SIGNAL_RUN_LAST, 0, NULL, NULL,
      g_cclosure_marshal_generic, G_TYPE_NONE, 1, GST_TYPE_ELEMENT);

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  /**
   * GstPlayBin3::element-setup:
   * @playbin: a #GstPlayBin3
   * @element: an element that was added to the playbin hierarchy
   *
   * This signal is emitted when a new element is added to playbin or any of
   * its sub-bins. This signal can be used to configure elements, e.g. to set
   * properties on decoders. This is functionally equivalent to connecting to
   * the deep-element-added signal, but more convenient.
   *
   * This signal is usually emitted from the context of a GStreamer streaming
   * thread, so might be called at the same time as code running in the main
   * application thread.
   *
   * Since: 1.10
   */
  gst_play_bin3_signals[SIGNAL_ELEMENT_SETUP] =
      g_signal_new ("element-setup", G_TYPE_FROM_CLASS (klass),
      G_SIGNAL_RUN_LAST, 0, NULL, NULL,
      g_cclosure_marshal_generic, G_TYPE_NONE, 1, GST_TYPE_ELEMENT);

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  /**
   * GstPlayBin3::convert-sample
   * @playbin: a #GstPlayBin3
   * @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
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   * equivalent to the #GstPlayBin3::sample property.
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   *
   * Returns: a #GstSample of the current video frame converted to #caps.
   * The caps on the sample 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_bin3_signals[SIGNAL_CONVERT_SAMPLE] =
      g_signal_new ("convert-sample", G_TYPE_FROM_CLASS (klass),
      G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
      G_STRUCT_OFFSET (GstPlayBin3Class, convert_sample), NULL, NULL,
      g_cclosure_marshal_generic, GST_TYPE_SAMPLE, 1, GST_TYPE_CAPS);

  klass->convert_sample = gst_play_bin3_convert_sample;

  gst_element_class_set_static_metadata (gstelement_klass,
      "Player Bin 3", "Generic/Bin/Player",
      "Autoplug and play media from an uri",
      "Wim Taymans <wim.taymans@gmail.com>");

  gstelement_klass->change_state =
      GST_DEBUG_FUNCPTR (gst_play_bin3_change_state);
  gstelement_klass->query = GST_DEBUG_FUNCPTR (gst_play_bin3_query);
  gstelement_klass->send_event = GST_DEBUG_FUNCPTR (gst_play_bin3_send_event);

  gstbin_klass->handle_message =
      GST_DEBUG_FUNCPTR (gst_play_bin3_handle_message);
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  gstbin_klass->deep_element_added =
      GST_DEBUG_FUNCPTR (gst_play_bin3_deep_element_added);
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}

static void
do_async_start (GstPlayBin3 * playbin)
{
  GstMessage *message;

  playbin->async_pending = TRUE;

  message = gst_message_new_async_start (GST_OBJECT_CAST (playbin));
  GST_BIN_CLASS (parent_class)->handle_message (GST_BIN_CAST (playbin),
      message);
}

static void
do_async_done (GstPlayBin3 * playbin)
{
  GstMessage *message;

  if (playbin->async_pending) {
    GST_DEBUG_OBJECT (playbin, "posting ASYNC_DONE");
    message =
        gst_message_new_async_done (GST_OBJECT_CAST (playbin),
        GST_CLOCK_TIME_NONE);
    GST_BIN_CLASS (parent_class)->handle_message (GST_BIN_CAST (playbin),
        message);

    playbin->async_pending = FALSE;
  }
}

/* init combiners. The combiner is found by finding the first prefix that
 * matches the media. */
static void
init_combiners (GstPlayBin3 * playbin)
{
  gint i;

  /* store the array for the different channels */
  for (i = 0; i < PLAYBIN_STREAM_LAST; i++)
    playbin->channels[i] = g_ptr_array_new ();

  playbin->combiner[PLAYBIN_STREAM_AUDIO].media_type = "audio";
  playbin->combiner[PLAYBIN_STREAM_AUDIO].type = GST_PLAY_SINK_TYPE_AUDIO;
  playbin->combiner[PLAYBIN_STREAM_AUDIO].channels = playbin->channels[0];
  playbin->combiner[PLAYBIN_STREAM_AUDIO].streams =
      g_ptr_array_new_with_free_func ((GDestroyNotify) gst_object_unref);
  playbin->combiner[PLAYBIN_STREAM_AUDIO].current_stream = -1;

  playbin->combiner[PLAYBIN_STREAM_VIDEO].media_type = "video";
  playbin->combiner[PLAYBIN_STREAM_VIDEO].type = GST_PLAY_SINK_TYPE_VIDEO;
  playbin->combiner[PLAYBIN_STREAM_VIDEO].channels = playbin->channels[1];
  playbin->combiner[PLAYBIN_STREAM_VIDEO].streams =
      g_ptr_array_new_with_free_func ((GDestroyNotify) gst_object_unref);
  playbin->combiner[PLAYBIN_STREAM_VIDEO].current_stream = -1;

  playbin->combiner[PLAYBIN_STREAM_TEXT].media_type = "text";
  playbin->combiner[PLAYBIN_STREAM_TEXT].get_media_caps =
      gst_subtitle_overlay_create_factory_caps;
  playbin->combiner[PLAYBIN_STREAM_TEXT].type = GST_PLAY_SINK_TYPE_TEXT;
  playbin->combiner[PLAYBIN_STREAM_TEXT].channels = playbin->channels[2];
  playbin->combiner[PLAYBIN_STREAM_TEXT].streams =
      g_ptr_array_new_with_free_func ((GDestroyNotify) gst_object_unref);
  playbin->combiner[PLAYBIN_STREAM_TEXT].current_stream = -1;
}

/* Update the combiner information to be in sync with the current collection */
static void
update_combiner_info (GstPlayBin3 * playbin)
{
  guint i, len;

  if (playbin->collection == NULL)
    return;

  GST_DEBUG_OBJECT (playbin, "Updating combiner info");

  /* Wipe current combiner streams */
  g_ptr_array_free (playbin->combiner[PLAYBIN_STREAM_AUDIO].streams, TRUE);
  g_ptr_array_free (playbin->combiner[PLAYBIN_STREAM_VIDEO].streams, TRUE);
  g_ptr_array_free (playbin->combiner[PLAYBIN_STREAM_TEXT].streams, TRUE);
  playbin->combiner[PLAYBIN_STREAM_AUDIO].streams =
      g_ptr_array_new_with_free_func ((GDestroyNotify) gst_object_unref);
  playbin->combiner[PLAYBIN_STREAM_AUDIO].current_stream = -1;
  playbin->combiner[PLAYBIN_STREAM_VIDEO].streams =
      g_ptr_array_new_with_free_func ((GDestroyNotify) gst_object_unref);
  playbin->combiner[PLAYBIN_STREAM_VIDEO].current_stream = -1;
  playbin->combiner[PLAYBIN_STREAM_TEXT].streams =
      g_ptr_array_new_with_free_func ((GDestroyNotify) gst_object_unref);
  playbin->combiner[PLAYBIN_STREAM_TEXT].current_stream = -1;

  len = gst_stream_collection_get_size (playbin->collection);
  for (i = 0; i < len; i++) {
    GstStream *stream =
        gst_stream_collection_get_stream (playbin->collection, i);
    GstStreamType stype = gst_stream_get_stream_type (stream);

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    if (stype & GST_STREAM_TYPE_AUDIO) {
      g_ptr_array_add (playbin->combiner[PLAYBIN_STREAM_AUDIO].streams,
          gst_object_ref (stream));
    } else if (stype & GST_STREAM_TYPE_VIDEO) {
      g_ptr_array_add (playbin->combiner[PLAYBIN_STREAM_VIDEO].streams,
          gst_object_ref (stream));
    } else if (stype & GST_STREAM_TYPE_TEXT) {
      g_ptr_array_add (playbin->combiner[PLAYBIN_STREAM_TEXT].streams,
          gst_object_ref (stream));
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    }
  }

  GST_DEBUG_OBJECT (playbin, "There are %d audio streams",
      playbin->combiner[PLAYBIN_STREAM_AUDIO].streams->len);
  GST_DEBUG_OBJECT (playbin, "There are %d video streams",
      playbin->combiner[PLAYBIN_STREAM_VIDEO].streams->len);
  GST_DEBUG_OBJECT (playbin, "There are %d text streams",
      playbin->combiner[PLAYBIN_STREAM_TEXT].streams->len);
}

/* Set the given stream as the selected stream */
static void
set_selected_stream (GstPlayBin3 * playbin, GstStream * stream)
{
  GstSourceCombine *combine = NULL;
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  GstStreamType stype = gst_stream_get_stream_type (stream);
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  if (stype & GST_STREAM_TYPE_AUDIO)
    combine = &playbin->combiner[PLAYBIN_STREAM_AUDIO];
  else if (stype & GST_STREAM_TYPE_VIDEO)
    combine = &playbin->combiner[PLAYBIN_STREAM_VIDEO];
  else if (stype & GST_STREAM_TYPE_TEXT)
    combine = &playbin->combiner[PLAYBIN_STREAM_TEXT];
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  if (combine) {
    if (combine->combiner == NULL) {
      guint i, len;

      GST_DEBUG_OBJECT (playbin, "Called for %s (%p)",
          gst_stream_get_stream_id (stream), combine->combiner);

      combine->current_stream = -1;
      len = combine->streams->len;
      for (i = 0; i < len; i++) {
        GstStream *cand = g_ptr_array_index (combine->streams, i);
        if (cand == stream) {
          GST_DEBUG_OBJECT (playbin, "Setting current to %d", i);
          combine->current_stream = i;
          break;
        }
      }
    }
  }
}

static void
init_group (GstPlayBin3 * playbin, GstSourceGroup * group)
{
  g_mutex_init (&group->lock);

  group->stream_changed_pending = FALSE;
  g_mutex_init (&group->stream_changed_pending_lock);

  group->playbin = playbin;
}

static void
free_group (GstPlayBin3 * playbin, GstSourceGroup * group)
{
  g_free (group->uri);
  g_free (group->suburi);

  g_mutex_clear (&group->lock);
  group->stream_changed_pending = FALSE;
  g_mutex_clear (&group->stream_changed_pending_lock);

  if (group->pending_buffering_msg)
    gst_message_unref (group->pending_buffering_msg);
  group->pending_buffering_msg = NULL;

  gst_object_replace ((GstObject **) & group->audio_sink, NULL);
  gst_object_replace ((GstObject **) & group->video_sink, NULL);
  gst_object_replace ((GstObject **) & group->text_sink, NULL);
}

static void
notify_volume_cb (GObject * combiner, GParamSpec * pspec, GstPlayBin3 * playbin)
{
  g_object_notify (G_OBJECT (playbin), "volume");
}

static void
notify_mute_cb (GObject * combiner, GParamSpec * pspec, GstPlayBin3 * playbin)
{
  g_object_notify (G_OBJECT (playbin), "mute");
}

static void
colorbalance_value_changed_cb (GstColorBalance * balance,
    GstColorBalanceChannel * channel, gint value, GstPlayBin3 * playbin)
{
  gst_color_balance_value_changed (GST_COLOR_BALANCE (playbin), channel, value);
}

static gint
compare_factories_func (gconstpointer p1, gconstpointer p2)
{
  GstPluginFeature *f1, *f2;
  gboolean is_sink1, is_sink2;
  gboolean is_parser1, is_parser2;

  f1 = (GstPluginFeature *) p1;
  f2 = (GstPluginFeature *) p2;

  is_sink1 = gst_element_factory_list_is_type (GST_ELEMENT_FACTORY_CAST (f1),
      GST_ELEMENT_FACTORY_TYPE_SINK);
  is_sink2 = gst_element_factory_list_is_type (GST_ELEMENT_FACTORY_CAST (f2),
      GST_ELEMENT_FACTORY_TYPE_SINK);
  is_parser1 = gst_element_factory_list_is_type (GST_ELEMENT_FACTORY_CAST (f1),
      GST_ELEMENT_FACTORY_TYPE_PARSER);
  is_parser2 = gst_element_factory_list_is_type (GST_ELEMENT_FACTORY_CAST (f2),
      GST_ELEMENT_FACTORY_TYPE_PARSER);

  /* First we want all sinks as we prefer a sink if it directly
   * supports the current caps */
  if (is_sink1 && !is_sink2)
    return -1;
  else if (!is_sink1 && is_sink2)
    return 1;

  /* Then we want all parsers as we always want to plug parsers
   * before decoders */
  if (is_parser1 && !is_parser2)
    return -1;
  else if (!is_parser1 && is_parser2)
    return 1;

  /* And if it's a both a parser or sink we first sort by rank
   * and then by factory name */
  return gst_plugin_feature_rank_compare_func (p1, p2);
}

/* Must be called with elements lock! */
static void
gst_play_bin3_update_elements_list (GstPlayBin3 * playbin)
{
  GList *res, *tmp;
  guint cookie;

  cookie = gst_registry_get_feature_list_cookie (gst_registry_get ());

  if (!playbin->elements || playbin->elements_cookie != cookie) {
    if (playbin->elements)
      gst_plugin_feature_list_free (playbin->elements);
    res =
        gst_element_factory_list_get_elements
        (GST_ELEMENT_FACTORY_TYPE_DECODABLE, GST_RANK_MARGINAL);
    tmp =
        gst_element_factory_list_get_elements
        (GST_ELEMENT_FACTORY_TYPE_AUDIOVIDEO_SINKS, GST_RANK_MARGINAL);
    playbin->elements = g_list_concat (res, tmp);
    playbin->elements = g_list_sort (playbin->elements, compare_factories_func);
  }

  if (!playbin->aelements || playbin->elements_cookie != cookie) {
    if (playbin->aelements)
      g_sequence_free (playbin->aelements);
    playbin->aelements = avelements_create (playbin, TRUE);
  }

  if (!playbin->velements || playbin->elements_cookie != cookie) {
    if (playbin->velements)
      g_sequence_free (playbin->velements);
    playbin->velements = avelements_create (playbin, FALSE);
  }

  playbin->elements_cookie = cookie;
}

static void
gst_play_bin3_init (GstPlayBin3 * playbin)
{
  g_rec_mutex_init (&playbin->lock);
  g_mutex_init (&playbin->dyn_lock);

  /* assume we can create an input-selector */
  playbin->have_selector = TRUE;

  init_combiners (playbin);

  /* 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 */
  g_mutex_init (&playbin->elements_lock);

  /* add sink */
  playbin->playsink =
      g_object_new (GST_TYPE_PLAY_SINK, "name", "playsink", "send-event-mode",
      1, NULL);
  gst_bin_add (GST_BIN_CAST (playbin), GST_ELEMENT_CAST (playbin->playsink));
  gst_play_sink_set_flags (playbin->playsink, DEFAULT_FLAGS);
  /* Connect to notify::volume and notify::mute signals for proxying */
  g_signal_connect (playbin->playsink, "notify::volume",
      G_CALLBACK (notify_volume_cb), playbin);
  g_signal_connect (playbin->playsink, "notify::mute",
      G_CALLBACK (notify_mute_cb), playbin);
  g_signal_connect (playbin->playsink, "value-changed",
      G_CALLBACK (colorbalance_value_changed_cb), playbin);

  playbin->current_video = DEFAULT_CURRENT_VIDEO;
  playbin->current_audio = DEFAULT_CURRENT_AUDIO;
  playbin->current_text = DEFAULT_CURRENT_TEXT;

  playbin->buffer_duration = DEFAULT_BUFFER_DURATION;
  playbin->buffer_size = DEFAULT_BUFFER_SIZE;
  playbin->ring_buffer_max_size = DEFAULT_RING_BUFFER_MAX_SIZE;

  playbin->force_aspect_ratio = TRUE;

  playbin->multiview_mode = GST_VIDEO_MULTIVIEW_FRAME_PACKING_NONE;
  playbin->multiview_flags = GST_VIDEO_MULTIVIEW_FLAGS_NONE;
}

static void
gst_play_bin3_finalize (GObject * object)
{
  GstPlayBin3 *playbin;
  gint i;

  playbin = GST_PLAY_BIN3 (object);

  free_group (playbin, &playbin->groups[0]);
  free_group (playbin, &playbin->groups[1]);

  for (i = 0; i < PLAYBIN_STREAM_LAST; i++)
    g_ptr_array_free (playbin->channels[i], TRUE);

  /* Setting states to NULL is safe here because playsink
   * will already be gone and none of these sinks will be
   * a child of playsink
   */
  if (playbin->video_sink) {
    gst_element_set_state (playbin->video_sink, GST_STATE_NULL);
    gst_object_unref (playbin->video_sink);
  }
  if (playbin->audio_sink) {
    gst_element_set_state (playbin->audio_sink, GST_STATE_NULL);
    gst_object_unref (playbin->audio_sink);
  }
  if (playbin->text_sink) {
    gst_element_set_state (playbin->text_sink, GST_STATE_NULL);
    gst_object_unref (playbin->text_sink);
  }

  if (playbin->video_stream_combiner) {
    gst_element_set_state (playbin->video_stream_combiner, GST_STATE_NULL);
    gst_object_unref (playbin->video_stream_combiner);
  }
  if (playbin->audio_stream_combiner) {
    gst_element_set_state (playbin->audio_stream_combiner, GST_STATE_NULL);
    gst_object_unref (playbin->audio_stream_combiner);
  }
  if (playbin->text_stream_combiner) {
    gst_element_set_state (playbin->text_stream_combiner, GST_STATE_NULL);
    gst_object_unref (playbin->text_stream_combiner);
  }

  g_ptr_array_free (playbin->combiner[PLAYBIN_STREAM_AUDIO].streams, TRUE);
  g_ptr_array_free (playbin->combiner[PLAYBIN_STREAM_VIDEO].streams, TRUE);
  g_ptr_array_free (playbin->combiner[PLAYBIN_STREAM_TEXT].streams, TRUE);

  if (playbin->decodebin)
    gst_object_unref (playbin->decodebin);

  if (playbin->elements)
    gst_plugin_feature_list_free (playbin->elements);

  if (playbin->aelements)
    g_sequence_free (playbin->aelements);

  if (playbin->velements)
    g_sequence_free (playbin->velements);

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  if (playbin->collection)
    gst_object_unref (playbin->collection);

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