gst_plugins_base/gst/playback/gstplaybasebin.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 16 Apr 2010 15:15:52 +0300
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permissions -rw-r--r--
Revision: 201011 Kit: 201015
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/* GStreamer
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 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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 *               <2007> Wim Taymans <wim.taymans@gmail.com>
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 *
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 * This library is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Library General Public
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 * License as published by the Free Software Foundation; either
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 * version 2 of the License, or (at your option) any later version.
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 *
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 * This library is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Library General Public License for more details.
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 *
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 * You should have received a copy of the GNU Library General Public
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 * License along with this library; if not, write to the
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 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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 * Boston, MA 02111-1307, USA.
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 */
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#ifndef __GST_PLAYBASEBIN_H__
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#define __GST_PLAYBASEBIN_H__
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#include <gst/gst.h>
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#include "gststreaminfo.h"
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G_BEGIN_DECLS
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#define GST_TYPE_PLAY_BASE_BIN            (gst_play_base_bin_get_type())
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#define GST_PLAY_BASE_BIN(obj)            (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_PLAY_BASE_BIN,GstPlayBaseBin))
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#define GST_PLAY_BASE_BIN_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_PLAY_BASE_BIN,GstPlayBaseBinClass))
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#define GST_IS_PLAY_BASE_BIN(obj)         (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_PLAY_BASE_BIN))
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#define GST_IS_PLAY_BASE_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_PLAY_BASE_BIN))
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#define GST_PLAY_BASE_BIN_GET_CLASS(obj) \
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  (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_PLAY_BASE_BIN, \
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                              GstPlayBaseBinClass))
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typedef struct _GstPlayBaseBin GstPlayBaseBin;
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typedef struct _GstPlayBaseBinClass GstPlayBaseBinClass;
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/* a GstPlayBaseGroup is a group of pads and streaminfo that together 
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 * make up a playable stream. A new group is created from the current 
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 * set of pads that are alive when the preroll elements are filled or 
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 * when the no-more-pads signal is fired.
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 *
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 * We have to queue the groups as they can be created while the preroll
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 * queues are still playing the old group. We monitor the EOS signals
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 * on the preroll queues and when all the streams in the current group
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 * have EOSed, we switch to the next queued group.
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 */
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typedef struct
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{
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  GstPlayBaseBin *bin;  /* ref to the owner */
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  gint           nstreams;
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  GList         *streaminfo;
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  GValueArray   *streaminfo_value_array;
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  /* contained decoded elementary streams */
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  struct {
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    gint         npads;
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    GstBin      *bin;
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    GstElement  *preroll;
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    GstElement  *selector;
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    gboolean     done;
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#define NUM_TYPES 4
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  } type[NUM_TYPES]; /* AUDIO, VIDEO, TEXT, SUBPIC */
0
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} GstPlayBaseGroup;
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struct _GstPlayBaseBin {
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  GstPipeline    pipeline;
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  /* properties */
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  guint64        queue_size;
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  guint64        queue_threshold;
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  guint64        queue_min_threshold;
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  /* connection speed in bits/sec (0 = unknown) */
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  guint          connection_speed;
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  /* currently loaded media */
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  gint           current[NUM_TYPES];
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  gchar         *uri, *suburi;
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  gboolean       is_stream;
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  GstElement    *source;
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  GSList        *decoders;
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  GstElement    *subtitle;              /* additional filesrc ! subparse bin */
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  gboolean       subtitle_done;
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  gboolean       need_rebuild;
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  gboolean       raw_decoding_mode;     /* Use smaller queues when source outputs raw data */
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  GSList        *subtitle_elements;     /* subtitle elements that have 'subtitle-encoding' property */
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  gchar         *subencoding;           /* encoding to propagate to the above subtitle elements     */
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  GMutex        *sub_lock;              /* protecting subtitle_elements and subencoding members     */
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  /* group management - using own lock */
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  GMutex        *group_lock;            /* lock and mutex to signal availability of new group */
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  GCond         *group_cond;
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  GstPlayBaseGroup *building_group;     /* the group that we are constructing */
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  GList         *queued_groups;         /* the constructed groups, head is the active one */
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  /* for dynamic sources */
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  guint          src_np_sig_id;		/* new-pad signal id */
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  guint          src_nmp_sig_id;        /* no-more-pads signal id */
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  gint           pending;
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};
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struct _GstPlayBaseBinClass {
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  GstPipelineClass parent_class;
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  /* virtual fuctions */
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  gboolean (*setup_output_pads) (GstPlayBaseBin *play_base_bin,
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                                 GstPlayBaseGroup *group);
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  void     (*set_subtitles_visible) (GstPlayBaseBin *play_base_bin,
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                                     gboolean visible);
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  void     (*set_audio_mute)        (GstPlayBaseBin *play_base_bin,
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                                     gboolean mute);
0
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};
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#ifdef __SYMBIAN32__
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IMPORT_C
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#endif
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GType gst_play_base_bin_get_type (void);
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G_END_DECLS
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#endif /* __GST_PLAYBASEBIN_H__ */
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