gst-libs/gst/pbutils/gstdiscoverer.h

   1 /* GStreamer
   2  * Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
   3  *               2009 Nokia Corporation
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Library General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Library General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Library General Public
  16  * License along with this library; if not, write to the
  17  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18  * Boston, MA 02111-1307, USA.
  19  */
  20
  21 #ifndef _GST_DISCOVERER_H_
  22 #define _GST_DISCOVERER_H_
  23
  24 #include <gst/gst.h>
  25
  26 G_BEGIN_DECLS
  27
  28 #define GST_TYPE_DISCOVERER_STREAM_INFO \
  29   (gst_discoverer_stream_info_get_type ())
  30 #define GST_DISCOVERER_STREAM_INFO(obj) \
  31   (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DISCOVERER_STREAM_INFO, GstDiscovererStreamInfo))
  32 #define GST_IS_DISCOVERER_STREAM_INFO(obj) \
  33   (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_DISCOVERER_STREAM_INFO))
  34 typedef struct _GstDiscovererStreamInfo GstDiscovererStreamInfo;
  35 typedef GObjectClass GstDiscovererStreamInfoClass;
  36 GType gst_discoverer_stream_info_get_type (void);
  37
  38 /**
  39  * GstDiscovererStreamInfo:
  40  *
  41  * Base structure for information concerning a media stream. Depending on the
  42  * stream type, one can find more media-specific information in
  43  * #GstDiscovererAudioInfo, #GstDiscovererVideoInfo, and
  44  * #GstDiscovererContainerInfo.
  45  *
  46  * The #GstDiscovererStreamInfo represents the topology of the stream. Siblings
  47  * can be iterated over with gst_discoverer_stream_info_get_next() and
  48  * gst_discoverer_stream_info_get_previous(). Children (sub-streams) of a
  49  * stream can be accessed using the #GstDiscovererContainerInfo API.
  50  *
  51  * As a simple example, if you run #GstDiscoverer on an AVI file with one audio
  52  * and one video stream, you will get a #GstDiscovererContainerInfo
  53  * corresponding to the AVI container, which in turn will have a
  54  * #GstDiscovererAudioInfo sub-stream and a #GstDiscovererVideoInfo sub-stream
  55  * for the audio and video streams respectively.
  56  *
  57  * Since: 0.10.31
  58  */
  59 #define gst_discoverer_stream_info_ref(info) ((GstDiscovererStreamInfo*) g_object_ref((GObject*) info))
  60 #define gst_discoverer_stream_info_unref(info) (g_object_unref((GObject*) info))
  61
  62 GstDiscovererStreamInfo* gst_discoverer_stream_info_get_previous(GstDiscovererStreamInfo* info);
  63 GstDiscovererStreamInfo* gst_discoverer_stream_info_get_next(GstDiscovererStreamInfo* info);
  64 GstCaps*                 gst_discoverer_stream_info_get_caps(GstDiscovererStreamInfo* info);
  65 const GstTagList*        gst_discoverer_stream_info_get_tags(GstDiscovererStreamInfo* info);
  66 const GstStructure*      gst_discoverer_stream_info_get_misc(GstDiscovererStreamInfo* info);
  67 const gchar *            gst_discoverer_stream_info_get_stream_type_nick(GstDiscovererStreamInfo* info);
  68
  69 /**
  70  * GstDiscovererContainerInfo:
  71  *
  72  * #GstDiscovererStreamInfo specific to container streams.
  73  *
  74  * Since: 0.10.31
  75  */
  76 #define GST_TYPE_DISCOVERER_CONTAINER_INFO \
  77   (gst_discoverer_container_info_get_type ())
  78 #define GST_DISCOVERER_CONTAINER_INFO(obj) \
  79   (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DISCOVERER_CONTAINER_INFO, GstDiscovererContainerInfo))
  80 #define GST_IS_DISCOVERER_CONTAINER_INFO(obj) \
  81   (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_DISCOVERER_CONTAINER_INFO))
  82 typedef struct _GstDiscovererContainerInfo GstDiscovererContainerInfo;
  83 typedef GObjectClass GstDiscovererContainerInfoClass;
  84
  85 GType gst_discoverer_container_info_get_type (void);
  86
  87 GList *gst_discoverer_container_info_get_streams(GstDiscovererContainerInfo *info);
  88
  89
  90 /**
  91  * GstDiscovererAudioInfo:
  92  *
  93  * #GstDiscovererStreamInfo specific to audio streams.
  94  *
  95  * Since: 0.10.31
  96  */
  97 #define GST_TYPE_DISCOVERER_AUDIO_INFO \
  98   (gst_discoverer_audio_info_get_type ())
  99 #define GST_DISCOVERER_AUDIO_INFO(obj) \
 100   (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DISCOVERER_AUDIO_INFO, GstDiscovererAudioInfo))
 101 #define GST_IS_DISCOVERER_AUDIO_INFO(obj) \
 102   (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_DISCOVERER_AUDIO_INFO))
 103 typedef struct _GstDiscovererAudioInfo GstDiscovererAudioInfo;
 104 typedef GObjectClass GstDiscovererAudioInfoClass;
 105
 106 GType gst_discoverer_audio_info_get_type (void);
 107
 108 guint gst_discoverer_audio_info_get_channels(const GstDiscovererAudioInfo* info);
 109 guint gst_discoverer_audio_info_get_sample_rate(const GstDiscovererAudioInfo* info);
 110 guint gst_discoverer_audio_info_get_depth(const GstDiscovererAudioInfo* info);
 111 guint gst_discoverer_audio_info_get_bitrate(const GstDiscovererAudioInfo* info);
 112 guint gst_discoverer_audio_info_get_max_bitrate(const GstDiscovererAudioInfo* info);
 113 const gchar * gst_discoverer_audio_info_get_language(const GstDiscovererAudioInfo* info);
 114
 115 /**
 116  * GstDiscovererVideoInfo:
 117  *
 118  * #GstDiscovererStreamInfo specific to video streams (this includes images).
 119  *
 120  * Since: 0.10.31
 121  */
 122 #define GST_TYPE_DISCOVERER_VIDEO_INFO \
 123   (gst_discoverer_video_info_get_type ())
 124 #define GST_DISCOVERER_VIDEO_INFO(obj) \
 125   (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DISCOVERER_VIDEO_INFO, GstDiscovererVideoInfo))
 126 #define GST_IS_DISCOVERER_VIDEO_INFO(obj) \
 127   (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_DISCOVERER_VIDEO_INFO))
 128 typedef struct _GstDiscovererVideoInfo GstDiscovererVideoInfo;
 129 typedef GObjectClass GstDiscovererVideoInfoClass;
 130 GType gst_discoverer_video_info_get_type (void);
 131
 132 guint           gst_discoverer_video_info_get_width(const GstDiscovererVideoInfo* info);
 133 guint           gst_discoverer_video_info_get_height(const GstDiscovererVideoInfo* info);
 134 guint           gst_discoverer_video_info_get_depth(const GstDiscovererVideoInfo* info);
 135 guint           gst_discoverer_video_info_get_framerate_num(const GstDiscovererVideoInfo* info);
 136 guint           gst_discoverer_video_info_get_framerate_denom(const GstDiscovererVideoInfo* info);
 137 guint           gst_discoverer_video_info_get_par_num(const GstDiscovererVideoInfo* info);
 138 guint           gst_discoverer_video_info_get_par_denom(const GstDiscovererVideoInfo* info);
 139 gboolean        gst_discoverer_video_info_is_interlaced(const GstDiscovererVideoInfo* info);
 140 guint           gst_discoverer_video_info_get_bitrate(const GstDiscovererVideoInfo* info);
 141 guint           gst_discoverer_video_info_get_max_bitrate(const GstDiscovererVideoInfo* info);
 142 gboolean        gst_discoverer_video_info_is_image(const GstDiscovererVideoInfo* info);
 143
 144 /**
 145  * GstDiscovererSubtitleInfo:
 146  *
 147  * #GstDiscovererStreamInfo specific to subtitle streams (this includes text and
 148  * image based ones).
 149  *
 150  * Since: 0.10.36
 151  */
 152 #define GST_TYPE_DISCOVERER_SUBTITLE_INFO \
 153   (gst_discoverer_subtitle_info_get_type ())
 154 #define GST_DISCOVERER_SUBTITLE_INFO(obj) \
 155   (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DISCOVERER_SUBTITLE_INFO, GstDiscovererSubtitleInfo))
 156 #define GST_IS_DISCOVERER_SUBTITLE_INFO(obj) \
 157   (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_DISCOVERER_SUBTITLE_INFO))
 158 typedef struct _GstDiscovererSubtitleInfo GstDiscovererSubtitleInfo;
 159 typedef GObjectClass GstDiscovererSubtitleInfoClass;
 160 GType gst_discoverer_subtitle_info_get_type (void);
 161
 162 const gchar *   gst_discoverer_subtitle_info_get_language(const GstDiscovererSubtitleInfo* info);
 163
 164 /**
 165  * GstDiscovererResult:
 166  * @GST_DISCOVERER_OK: The discovery was successful
 167  * @GST_DISCOVERER_URI_INVALID: the URI is invalid
 168  * @GST_DISCOVERER_ERROR: an error happened and the GError is set
 169  * @GST_DISCOVERER_TIMEOUT: the discovery timed-out
 170  * @GST_DISCOVERER_BUSY: the discoverer was already discovering a file
 171  * @GST_DISCOVERER_MISSING_PLUGINS: Some plugins are missing for full discovery
 172  *
 173  * Result values for the discovery process.
 174  *
 175  * Since: 0.10.31
 176  */
 177 typedef enum {
 178   GST_DISCOVERER_OK               = 0,
 179   GST_DISCOVERER_URI_INVALID      = 1,
 180   GST_DISCOVERER_ERROR            = 2,
 181   GST_DISCOVERER_TIMEOUT          = 3,
 182   GST_DISCOVERER_BUSY             = 4,
 183   GST_DISCOVERER_MISSING_PLUGINS  = 5
 184 } GstDiscovererResult;
 185
 186
 187 /**
 188  * GstDiscovererInfo:
 189  *
 190  * Structure containing the information of a URI analyzed by #GstDiscoverer.
 191  *
 192  * Since: 0.10.31
 193  */
 194 typedef struct _GstDiscovererInfo GstDiscovererInfo;
 195
 196 #define GST_TYPE_DISCOVERER_INFO \
 197   (gst_discoverer_info_get_type ())
 198 #define GST_DISCOVERER_INFO(obj) \
 199   (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DISCOVERER_INFO, GstDiscovererInfo))
 200 #define GST_IS_DISCOVERER_INFO(obj) \
 201   (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_DISCOVERER_INFO))
 202 typedef GObjectClass GstDiscovererInfoClass;
 203 GType gst_discoverer_info_get_type (void);
 204
 205 #define gst_discoverer_info_unref(info) (g_object_unref((GObject*)info))
 206 #define gst_discoverer_info_ref(info) (g_object_ref((Gbject*)info))
 207
 208 GstDiscovererInfo*        gst_discoverer_info_copy (GstDiscovererInfo * ptr);
 209
 210 const gchar*              gst_discoverer_info_get_uri(const GstDiscovererInfo* info);
 211 GstDiscovererResult       gst_discoverer_info_get_result(const GstDiscovererInfo* info);
 212 GstDiscovererStreamInfo*  gst_discoverer_info_get_stream_info(GstDiscovererInfo* info);
 213 GList*                    gst_discoverer_info_get_stream_list(GstDiscovererInfo* info);
 214 GstClockTime              gst_discoverer_info_get_duration(const GstDiscovererInfo* info);
 215 gboolean                  gst_discoverer_info_get_seekable(const GstDiscovererInfo* info);
 216 const GstStructure*       gst_discoverer_info_get_misc(const GstDiscovererInfo* info);
 217 const GstTagList*         gst_discoverer_info_get_tags(const GstDiscovererInfo* info);
 218
 219 GList *                   gst_discoverer_info_get_streams (GstDiscovererInfo *info,
 220                                                            GType streamtype);
 221 GList *                   gst_discoverer_info_get_audio_streams (GstDiscovererInfo *info);
 222 GList *                   gst_discoverer_info_get_video_streams (GstDiscovererInfo *info);
 223 GList *                   gst_discoverer_info_get_subtitle_streams (GstDiscovererInfo *info);
 224 GList *                   gst_discoverer_info_get_container_streams (GstDiscovererInfo *info);
 225
 226 void                      gst_discoverer_stream_info_list_free (GList *infos);
 227
 228 #define GST_TYPE_DISCOVERER \
 229   (gst_discoverer_get_type())
 230 #define GST_DISCOVERER(obj) \
 231   (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DISCOVERER,GstDiscoverer))
 232 #define GST_DISCOVERER_CLASS(klass) \
 233   (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_DISCOVERER,GstDiscovererClass))
 234 #define GST_IS_DISCOVERER(obj) \
 235   (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_DISCOVERER))
 236 #define GST_IS_DISCOVERER_CLASS(klass) \
 237   (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_DISCOVERER))
 238
 239 typedef struct _GstDiscoverer GstDiscoverer;
 240 typedef struct _GstDiscovererClass GstDiscovererClass;
 241 typedef struct _GstDiscovererPrivate GstDiscovererPrivate;
 242
 243 /**
 244  * GstDiscoverer:
 245  *
 246  * The #GstDiscoverer structure.
 247  *
 248  * Since: 0.10.31
 249  **/
 250 struct _GstDiscoverer {
 251   GObject parent;
 252
 253   GstDiscovererPrivate *priv;
 254
 255   gpointer _reserved[GST_PADDING];
 256 };
 257
 258 struct _GstDiscovererClass {
 259   GObjectClass parentclass;
 260
 261   /* signals */
 262   void        (*finished)        (GstDiscoverer *discoverer);
 263   void        (*starting)        (GstDiscoverer *discoverer);
 264   void        (*discovered)      (GstDiscoverer *discoverer,
 265                                   GstDiscovererInfo *info,
 266                                   const GError *err);
 267
 268   gpointer _reserved[GST_PADDING];
 269 };
 270
 271 GType          gst_discoverer_get_type (void);
 272 GstDiscoverer *gst_discoverer_new (GstClockTime timeout, GError **err);
 273
 274 /* Asynchronous API */
 275 void           gst_discoverer_start (GstDiscoverer *discoverer);
 276 void           gst_discoverer_stop (GstDiscoverer *discoverer);
 277 gboolean       gst_discoverer_discover_uri_async (GstDiscoverer *discoverer,
 278                                                   const gchar *uri);
 279
 280 /* Synchronous API */
 281 GstDiscovererInfo *
 282 gst_discoverer_discover_uri (GstDiscoverer * discoverer,
 283                              const gchar * uri,
 284                              GError ** err);
 285
 286 G_END_DECLS
 287
 288 #endif /* _GST_DISCOVERER_H */