--- /dev/null
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include <gst/gst.h>
+#include <string.h>
+#include "media-info.h"
+
+static gboolean _gst_media_info_debug = FALSE;
+#define GMI_DEBUG(format, args...) \
+ { if (_gst_media_info_debug) { g_print ( format , ## args ); }}
+
+struct GstMediaInfoPriv
+{
+ GstElement *pipeline;
+
+ GstElement *typefind;
+
+ GstCaps *type;
+ GstPad *decoder_pad; /* pad for querying decoded caps */
+ GstPad *source_pad; /* pad for querying encoded caps */
+
+ GstCaps *format;
+ GstCaps *metadata;
+ GstCaps *streaminfo;
+
+ GstElement *decoder; /* will be != NULL during collection */
+ gchar *source_element; /* type of element used as source */
+ GstElement *source;
+
+ GHashTable *decoders; /* a table of decoder GstElements */
+
+ GstMediaInfoStream *stream; /* total stream properties */
+ char *cache; /* location of cache */
+};
+
+static void gst_media_info_class_init (GstMediaInfoClass *klass);
+static void gst_media_info_instance_init (GstMediaInfo *info);
+
+static void gst_media_info_get_property (GObject *object, guint prop_id,
+ GValue *value, GParamSpec *pspec);
+
+
+static void gst_media_info_reset (GstMediaInfo *info);
+
+static void deep_notify_callback (GObject *object, GstObject *origin,
+ GParamSpec *pspec, GstMediaInfo *info);
+
+/* helper structs bits */
+static GstMediaInfoStream *
+gst_media_info_stream_new (void)
+{
+ GstMediaInfoStream *stream;
+
+ stream = g_malloc (sizeof (GstMediaInfoStream));
+
+ stream->length_tracks = 0;
+ stream->length_time = 0;
+ stream->bitrate = 0;
+ stream->seekable = FALSE;
+ stream->path = NULL;
+ stream->mime = NULL;
+ stream->tracks = NULL;
+
+ return stream;
+}
+
+static void
+gst_media_info_stream_free (GstMediaInfoStream *stream)
+{
+ if (stream->mime) g_free (stream->mime);
+ /* FIXME: free tracks */
+ g_free (stream);
+}
+
+static GstMediaInfoTrack *
+gst_media_info_track_new (void)
+{
+ GstMediaInfoTrack *track;
+
+ track = g_malloc (sizeof (GstMediaInfoTrack));
+
+ track->metadata = NULL;
+ track->streaminfo = NULL;
+ track->format = NULL;
+ track->length_time = 0;
+ track->con_streams = NULL;
+
+ return track;
+}
+/* GObject-y bits */
+
+/* signal stuff */
+enum
+{
+ MEDIA_INFO_SIGNAL,
+ LAST_SIGNAL
+};
+
+static guint gst_media_info_signals[LAST_SIGNAL] = { 0 };
+
+/* GError stuff */
+/*
+enum
+{
+ MEDIA_INFO_ERROR_FILE
+};
+*/
+/* GError quark stuff */
+/*
+static GQuark
+gst_media_info_error_quark (void)
+{
+ static GQuark quark = 0;
+ if (quark == 0)
+ quark = g_quark_from_static_string ("gst-media-info-error-quark");
+ return quark;
+}
+*/
+/*
+ * GObject type stuff
+ */
+
+enum
+{
+ PROP_SOURCE
+};
+
+static GObjectClass *parent_class = NULL;
+
+GType
+gst_media_info_get_type (void)
+{
+ static GType gst_media_info_type = 0;
+ if (!gst_media_info_type)
+ {
+ static const GTypeInfo gst_media_info_info = {
+ sizeof (GstMediaInfoClass),
+ (GBaseInitFunc) NULL,
+ (GBaseFinalizeFunc) NULL,
+ (GClassInitFunc) gst_media_info_class_init,
+ NULL, NULL,
+ sizeof (GstMediaInfo),
+ 0,
+ (GInstanceInitFunc) gst_media_info_instance_init,
+ NULL
+ };
+ gst_media_info_type = g_type_register_static (G_TYPE_OBJECT,
+ "GstMediaInfo",
+ &gst_media_info_info, 0);
+ }
+ return gst_media_info_type;
+}
+
+static void
+gst_media_info_class_init (GstMediaInfoClass *klass)
+{
+ GObjectClass *g_object_class = G_OBJECT_CLASS (klass);
+
+ parent_class = g_type_class_ref (G_TYPE_OBJECT);
+ //parent_class = g_type_class_peek_parent (klass);
+
+
+ /*
+ object_class->finalize = gst_media_info_finalize;
+ object_class->dispose = gst_media_info_dispose;
+ */
+
+ /*
+ g_object_class->set_property = gst_media_info_set_property;
+ */
+ g_object_class->get_property = gst_media_info_get_property;
+
+ klass->media_info_signal = NULL;
+
+ gst_media_info_signals [MEDIA_INFO_SIGNAL] =
+ g_signal_new ("media-info",
+ G_TYPE_FROM_CLASS (klass),
+ G_SIGNAL_RUN_FIRST,
+ G_STRUCT_OFFSET (GstMediaInfoClass, media_info_signal),
+ NULL, NULL,
+ gst_marshal_VOID__VOID,
+ G_TYPE_NONE, 0);
+}
+
+static void
+gst_media_info_instance_init (GstMediaInfo *info)
+{
+ GstElement *source;
+
+ info->priv = g_new0 (GstMediaInfoPriv, 1);
+
+ info->priv->pipeline = gst_pipeline_new ("media-info");
+
+ info->priv->typefind = gst_element_factory_make ("typefind", "typefind");
+ if (!GST_IS_ELEMENT (info->priv->typefind))
+ /* FIXME */
+ g_error ("Cannot create typefind element !");
+
+ /* ref it so it never goes away on removal out of bins */
+ gst_object_ref (GST_OBJECT (info->priv->typefind));
+
+ /* use gnomevfssrc by default */
+ source = gst_element_factory_make ("gnomevfssrc", "source");
+ if (GST_IS_ELEMENT (source))
+ {
+ info->priv->source = source;
+ info->priv->source_element = g_strdup ("gnomevfssrc");
+ gst_bin_add (GST_BIN (info->priv->pipeline), info->priv->source);
+ }
+ else
+ {
+ info->priv->source = NULL;
+ info->priv->source_element = NULL;
+ }
+ info->priv->decoder = NULL;
+ info->priv->type = NULL;
+ info->priv->format = NULL;
+ info->priv->metadata = NULL;
+
+ /* clear result pointers */
+ info->priv->stream = NULL;
+
+ /* set up decoder hash table */
+ info->priv->decoders = g_hash_table_new (g_str_hash, g_str_equal);
+
+ /* attach notify handler */
+ g_signal_connect (G_OBJECT (info->priv->pipeline), "deep_notify",
+ G_CALLBACK (deep_notify_callback), info);
+}
+
+/* get/set */
+static void
+gst_media_info_get_property (GObject *object, guint prop_id,
+ GValue *value, GParamSpec *pspec)
+{
+ GstMediaInfo *info = GST_MEDIA_INFO (object);
+
+ switch (prop_id)
+ {
+ case PROP_SOURCE:
+ g_value_set_string (value, info->priv->source_element);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+/**
+ * private functions
+ */
+
+/* callbacks */
+static void
+have_type_callback (GstElement *typefind, GstCaps *type, GstMediaInfo *info)
+{
+ info->priv->type = type;
+}
+
+static void
+deep_notify_callback (GObject *object, GstObject *origin,
+ GParamSpec *pspec, GstMediaInfo *info)
+{
+ GValue value = { 0, };
+
+ if (strcmp (pspec->name, "metadata") == 0)
+ {
+ GMI_DEBUG("DEBUG: deep_notify: have metadata !\n");
+ g_value_init (&value, pspec->value_type);
+ g_object_get_property (G_OBJECT (origin), pspec->name, &value);
+ info->priv->metadata = g_value_peek_pointer (&value);
+ }
+ else if (strcmp (pspec->name, "caps") == 0)
+ {
+ /* check if we're getting it from the source we want it from */
+ if (GST_IS_PAD (origin) && GST_PAD (origin) == info->priv->decoder_pad)
+ {
+ GMI_DEBUG("DEBUG: deep_notify: have caps on decoder_pad !\n");
+ g_value_init (&value, pspec->value_type);
+ g_object_get_property (G_OBJECT (origin), pspec->name, &value);
+ info->priv->format = g_value_peek_pointer (&value);
+ }
+ else GMI_DEBUG("DEBUG: igoring caps on object %s:%s\n",
+ gst_object_get_name (gst_object_get_parent (origin)),
+ gst_object_get_name (origin));
+ }
+ else if (strcmp (pspec->name, "offset") == 0)
+ {
+ /* we REALLY ignore offsets, we hate them */
+ }
+ else if (strcmp (pspec->name, "streaminfo") == 0)
+ {
+ GMI_DEBUG("DEBUG: deep_notify: have streaminfo !\n");
+ g_value_init (&value, pspec->value_type);
+ g_object_get_property (G_OBJECT (origin), pspec->name, &value);
+ info->priv->streaminfo = g_value_peek_pointer (&value);
+ }
+ else GMI_DEBUG("DEBUG: ignoring notify of %s\n", pspec->name);
+}
+
+/* helpers */
+
+/* reset info to a state where it can be used to query for media info
+ * clear caps, metadata, and so on */
+static void
+gst_media_info_reset (GstMediaInfo *info)
+{
+ GstMediaInfoPriv *priv = info->priv;
+ /* clear out some stuff */
+ if (priv->format)
+ {
+ gst_caps_unref (priv->format);
+ priv->format = NULL;
+ }
+ if (priv->metadata)
+ {
+ gst_caps_unref (priv->metadata);
+ priv->metadata = NULL;
+ }
+ if (priv->stream)
+ {
+ g_free (priv->stream);
+ priv->stream = NULL;
+ }
+}
+
+/* seek to a track and reset metadata and streaminfo structs */
+static gboolean
+gst_media_info_seek_to_track (GstMediaInfo *info, long track)
+{
+ GstEvent *event;
+ GstFormat track_format = 0;
+ GstMediaInfoPriv *priv = info->priv;
+ gboolean res;
+
+ /* FIXME: consider more nicks as "track" */
+ track_format = gst_format_get_by_nick ("logical_stream");
+ if (track_format == 0) return FALSE;
+ GMI_DEBUG("Track format: %d\n", track_format);
+
+ if (gst_element_set_state (priv->pipeline, GST_STATE_PLAYING)
+ == GST_STATE_FAILURE)
+ g_warning ("Couldn't set to play");
+ g_assert (GST_IS_PAD (info->priv->decoder_pad));
+ event = gst_event_new_seek (track_format |
+ GST_SEEK_METHOD_SET |
+ GST_SEEK_FLAG_FLUSH,
+ track);
+ res = gst_pad_send_event (info->priv->decoder_pad, event);
+ g_assert (res);
+ if (!res)
+ {
+ g_warning ("seek to logical track failed");
+ return FALSE;
+ }
+ /* clear structs because of the seek */
+ if (priv->metadata)
+ {
+ gst_caps_unref (priv->metadata);
+ priv->metadata = NULL;
+ }
+ if (priv->streaminfo)
+ {
+ gst_caps_unref (priv->streaminfo);
+ priv->streaminfo = NULL;
+ }
+ return TRUE;
+}
+
+/* create a good decoder for this mime type */
+/* FIXME: maybe make this more generic with a type, so it can be used
+ * for taggers and other things as well */
+GstElement *
+gst_media_info_get_decoder (GstMediaInfo *info, const char *mime)
+{
+ GstElement *decoder;
+ gchar *factory = NULL;
+
+ /* check if we have an active codec element in the hash table for this */
+ decoder = g_hash_table_lookup (info->priv->decoders, mime);
+ if (decoder == NULL)
+ {
+ GMI_DEBUG("DEBUG: no decoder in table, inserting one\n");
+ if (strcmp (mime, "application/x-ogg") == 0)
+ factory = g_strdup ("vorbisfile");
+ else if (strcmp (mime, "audio/mp3") == 0)
+ factory = g_strdup ("mad");
+ else if (strcmp (mime, "audio/x-wav") == 0)
+ factory = g_strdup ("wavparse");
+
+ if (factory == NULL)
+ return NULL;
+
+ GMI_DEBUG("DEBUG: using factory %s\n", factory);
+ decoder = gst_element_factory_make (factory, "decoder");
+ g_free (factory);
+
+ if (decoder)
+ {
+ g_hash_table_insert (info->priv->decoders, g_strdup (mime), decoder);
+ /* ref it so we don't lose it when removing from bin */
+ g_object_ref (GST_OBJECT (decoder));
+ }
+ }
+
+ return decoder;
+}
+
+/* find the type of a file and store it in the caps of the info
+ * FIXME: we might better return GstCaps instead of storing them
+ * internally */
+static void
+gst_media_info_find_type (GstMediaInfo *info, const char *location)
+{
+ GstMediaInfoPriv *priv = info->priv;
+
+ /* clear vars that need clearing */
+ if (priv->type)
+ {
+ gst_caps_unref (priv->type);
+ priv->type = NULL;
+ }
+
+ GMI_DEBUG("DEBUG: gst_media_info_find_type: start\n");
+ /* find out type */
+ /* FIXME: we could move caps for typefind out of struct and
+ * just use it through this function only */
+
+ gst_bin_add (GST_BIN (priv->pipeline), priv->typefind);
+ g_object_set (G_OBJECT (priv->source), "location", location, NULL);
+ if (!gst_element_connect (priv->source, priv->typefind))
+ g_warning ("Couldn't connect source and typefind\n");
+ g_signal_connect (G_OBJECT (priv->typefind), "have-type",
+ G_CALLBACK (have_type_callback), info);
+ if (gst_element_set_state (priv->pipeline, GST_STATE_PLAYING)
+ == GST_STATE_FAILURE)
+ g_warning ("Couldn't set to play");
+ GMI_DEBUG("DEBUG: gst_media_info_find_type: iterating\n");
+ while ((priv->type == NULL) &&
+ gst_bin_iterate (GST_BIN (priv->pipeline)))
+ GMI_DEBUG("+");
+ GMI_DEBUG("\n");
+
+ /*clear up typefind */
+ gst_element_set_state (priv->pipeline, GST_STATE_READY);
+ gst_element_disconnect (priv->source, priv->typefind);
+ gst_bin_remove (GST_BIN (priv->pipeline), priv->typefind);
+}
+/* get properties of complete physical stream
+ * and return them in pre-alloced stream struct */
+static gboolean
+gst_media_info_get_stream (GstMediaInfo *info, GstMediaInfoStream *stream)
+{
+ GstMediaInfoPriv *priv = info->priv;
+ const GstFormat *formats;
+ GstFormat track_format = 0;
+ GstFormat format;
+ gint64 value;
+ gboolean res;
+ glong bytes = 0;
+
+ GMI_DEBUG("DEBUG:gst_media_info_get_stream start\n");
+
+ if (gst_element_set_state (priv->pipeline, GST_STATE_PLAYING)
+ == GST_STATE_FAILURE)
+ g_warning ("Couldn't set to play");
+ /* iterate until caps are found */
+ /* FIXME: this should be done through the plugin sending some signal
+ * that it is ready for queries */
+ while (gst_bin_iterate (GST_BIN (priv->pipeline)) &&
+ priv->format == NULL)
+ ;
+ if (gst_element_set_state (priv->pipeline, GST_STATE_PAUSED)
+ == GST_STATE_FAILURE)
+ g_warning ("Couldn't set to paused");
+ if (priv->format == NULL)
+ {
+ GMI_DEBUG("DEBUG: gst_media_info_get_stream: couldn't get caps !");
+ return FALSE;
+ }
+
+ /* find a format that matches the "track" concept */
+ /* FIXME: this is used in vorbis, but we might have to loop when
+ * more codecs have tracks */
+ track_format = gst_format_get_by_nick ("logical_stream");
+
+ /* get supported formats on decoder pad */
+ formats = gst_pad_get_formats (priv->decoder_pad);
+ while (*formats)
+ {
+ const GstFormatDefinition *definition;
+
+ format = *formats;
+
+ g_assert (GST_IS_PAD (priv->decoder_pad));
+ res = gst_pad_query (priv->decoder_pad, GST_PAD_QUERY_TOTAL,
+ &format, &value);
+
+ definition = gst_format_get_details (*formats);
+ GMI_DEBUG("trying to figure out length for format %s\n", definition->nick);
+
+ if (res)
+ {
+ switch (format)
+ {
+ case GST_FORMAT_TIME:
+ stream->length_time = value;
+ g_print (" total %s: %lld\n", definition->nick, value);
+ break;
+ default:
+ /* separation is necessary because track_format doesn't resolve to
+ * int */
+ if (format == track_format)
+ {
+ stream->length_tracks = value;
+ g_print (" total %s: %lld\n", definition->nick, value);
+ }
+ else
+ g_print ("warning: unhandled format %s\n", definition->nick);
+ }
+ }
+ else
+ GMI_DEBUG("query didn't return result for %s\n", definition->nick);
+
+ formats++;
+ }
+ if (stream->length_tracks == 0) stream->length_tracks = 1;
+ /* now get number of bytes from the sink pad to get the bitrate */
+ format = GST_FORMAT_BYTES;
+ g_assert (GST_IS_PAD (priv->source_pad));
+ res = gst_pad_query (priv->source_pad, GST_PAD_QUERY_TOTAL,
+ &format, &value);
+ if (!res) g_warning ("Failed to query on sink pad !");
+ bytes = value;
+
+ if (bytes)
+ {
+ double seconds = stream->length_time / GST_SECOND;
+ double bits = bytes * 8;
+ stream->bitrate = (long) (bits / seconds);
+ }
+ return TRUE;
+}
+
+/* find metadata encoded in media */
+GstCaps *
+gst_media_info_find_metadata (GstMediaInfo *info)
+{
+ GstMediaInfoPriv *priv = info->priv;
+ GstCaps *metadata;
+
+ if (gst_element_set_state (priv->pipeline, GST_STATE_PLAYING)
+ == GST_STATE_FAILURE)
+ g_warning ("Couldn't set to play");
+ GMI_DEBUG("DEBUG: gst_media_info_find_metadata: iterating\n");
+ while ((priv->metadata == NULL) &&
+ gst_bin_iterate (GST_BIN (priv->pipeline)))
+ GMI_DEBUG("+");
+ GMI_DEBUG("\n");
+ gst_element_set_state (priv->pipeline, GST_STATE_PAUSED);
+ metadata = priv->metadata;
+ priv->metadata = NULL;
+ return metadata;
+}
+
+/* find streaminfo found by decoder */
+GstCaps *
+gst_media_info_find_streaminfo (GstMediaInfo *info)
+{
+ GstMediaInfoPriv *priv = info->priv;
+ GstCaps *streaminfo;
+ GstFormat format, track_format;
+
+ if (gst_element_set_state (priv->pipeline, GST_STATE_PLAYING)
+ == GST_STATE_FAILURE)
+ g_warning ("Couldn't set to play");
+ GMI_DEBUG("DEBUG: gst_media_info_find_streaminfo: iterating\n");
+ while ((priv->streaminfo == NULL) &&
+ gst_bin_iterate (GST_BIN (priv->pipeline)))
+ GMI_DEBUG("+");
+ GMI_DEBUG("\n");
+ gst_element_set_state (priv->pipeline, GST_STATE_PAUSED);
+ streaminfo = priv->streaminfo;
+ priv->streaminfo = NULL;
+
+ /* now add total length to this, and maybe even bitrate ? FIXME */
+ track_format = gst_format_get_by_nick ("logical_stream");
+ if (track_format == 0)
+ {
+ g_print ("FIXME: implement getting length of whole track\n");
+ }
+ else
+ {
+ /* which one are we at ? */
+ long track_num;
+ gint64 value_start, value_end;
+ gboolean res;
+
+ res = gst_pad_query (priv->decoder_pad, GST_PAD_QUERY_POSITION,
+ &track_format, &value_start);
+ if (res)
+ {
+ format = GST_FORMAT_TIME;
+ track_num = value_start;
+ GMI_DEBUG("DEBUG: we are currently at %ld\n", track_num);
+ res = gst_pad_convert (priv->decoder_pad,
+ track_format, track_num,
+ &format, &value_start);
+ res &= gst_pad_convert (priv->decoder_pad,
+ track_format, track_num + 1,
+ &format, &value_end);
+ if (res)
+ {
+ GstPropsEntry *length;
+ /* substract to get the length */
+ GMI_DEBUG("DEBUG: start %lld, end %lld\n", value_start, value_end);
+ value_end -= value_start;
+ length = gst_props_entry_new ("length", GST_PROPS_INT ((int) value_end));
+ gst_props_add_entry (gst_caps_get_props (streaminfo), length);
+ }
+ }
+ }
+
+ return streaminfo;
+}
+
+/* find format found by decoder */
+GstCaps *
+gst_media_info_find_format (GstMediaInfo *info)
+{
+ GstMediaInfoPriv *priv = info->priv;
+ GstCaps *format;
+
+ if (gst_element_set_state (priv->pipeline, GST_STATE_PLAYING)
+ == GST_STATE_FAILURE)
+ g_warning ("Couldn't set to play");
+ GMI_DEBUG("DEBUG: gst_media_info_find_format: iterating\n");
+ while ((priv->format == NULL) &&
+ gst_bin_iterate (GST_BIN (priv->pipeline)))
+ GMI_DEBUG("+");
+ GMI_DEBUG("\n");
+ gst_element_set_state (priv->pipeline, GST_STATE_PAUSED);
+ format = priv->format;
+ priv->format = NULL;
+ return format;
+}
+
+/* clear the decoder
+ * (if it was set)
+ */
+static void
+gst_media_info_clear_decoder (GstMediaInfo *info)
+{
+ if (info->priv->decoder)
+ {
+ /* clear up decoder */
+ /* FIXME: shouldn't need to set state here */
+ gst_element_set_state (info->priv->pipeline, GST_STATE_READY);
+ gst_element_disconnect (info->priv->source, info->priv->decoder);
+ gst_bin_remove (GST_BIN (info->priv->pipeline), info->priv->decoder);
+ info->priv->decoder = NULL;
+ }
+}
+
+/* set the decoder to be used for decoding
+ * install callback handlers
+ */
+
+static void
+gst_media_info_set_decoder (GstMediaInfo *info, GstElement *decoder)
+{
+ GstMediaInfoPriv *priv = info->priv;
+
+ /* set up pipeline and connect signal handlers */
+ priv->decoder = decoder;
+ gst_bin_add (GST_BIN (priv->pipeline), decoder);
+ if (!gst_element_connect (priv->source, decoder))
+ g_warning ("Couldn't connect source and decoder\n");
+ /* FIXME: we should be connecting to ALL possible src pads */
+ if (!(priv->decoder_pad = gst_element_get_pad (decoder, "src")))
+ g_warning ("Couldn't get decoder pad\n");
+ if (!(priv->source_pad = gst_element_get_pad (priv->source, "src")))
+ g_warning ("Couldn't get source pad\n");
+}
+
+/**
+ * public methods
+ */
+gboolean
+gst_media_info_set_source (GstMediaInfo *info, const char *source)
+{
+ GstElement *src;
+ src = gst_element_factory_make (source, "new-source");
+ if (!GST_IS_ELEMENT (src))
+ return FALSE;
+
+ if (info->priv->source)
+ {
+ /* this also unrefs the element */
+ gst_bin_remove (GST_BIN (info->priv->pipeline), info->priv->source);
+ if (info->priv->source_element)
+ {
+ g_free (info->priv->source_element);
+ info->priv->source_element = NULL;
+ }
+ }
+ g_object_set (G_OBJECT (src), "name", "source", NULL);
+ gst_bin_add (GST_BIN (info->priv->pipeline), src);
+ info->priv->source = src;
+ info->priv->source_element = g_strdup (source);
+
+ return TRUE;
+}
+
+GstMediaInfoStream *
+gst_media_info_read (GstMediaInfo *info, const char *location, guint16 flags)
+{
+ GstMediaInfoPriv *priv = info->priv;
+ GstElement *decoder = NULL;
+ const gchar *mime;
+ GstMediaInfoStream *stream = NULL;
+ int i;
+
+ GMI_DEBUG("DEBUG: gst_media_info_read: start\n");
+ gst_media_info_reset (info); /* reset all structs */
+ /* find out type */
+ /* FIXME: we could move caps for typefind out of struct and
+ * just use it through this function only */
+ gst_media_info_find_type (info, location);
+
+ if (priv->type == NULL)
+ {
+ /* iteration ended, still don't have type, ugh */
+ g_warning ("iteration ended, type not found !\n");
+ return NULL;
+ }
+ stream = gst_media_info_stream_new ();
+ mime = gst_caps_get_mime (priv->type);
+ if (flags & GST_MEDIA_INFO_MIME)
+ stream->mime = g_strdup (mime);
+ stream->path = g_strdup (location);
+ GMI_DEBUG("mime type: %s\n", mime);
+ decoder = gst_media_info_get_decoder (info, mime);
+
+ /* if it's NULL, then that's a sign we can't decode it */
+ if (decoder == NULL)
+ {
+ g_warning ("Can't find a decoder for type %s\n", mime);
+ gst_media_info_stream_free (stream);
+ return NULL;
+ }
+ /* install this decoder in the pipeline */
+ gst_media_info_set_decoder (info, decoder);
+
+ /* collect total stream properties */
+ gst_media_info_get_stream (info, stream);
+
+ /* if we have multiple tracks, loop over them; if not, just get
+ * metadata and return it */
+ GMI_DEBUG("DEBUG: num tracks %ld\n", stream->length_tracks);
+ for (i = 0; i < stream->length_tracks; ++i)
+ {
+ GstMediaInfoTrack *track = gst_media_info_track_new ();
+ if (i > 0)
+ {
+ GMI_DEBUG("seeking to track %d\n", i);
+ gst_media_info_seek_to_track (info, i);
+ }
+ if (flags & GST_MEDIA_INFO_METADATA)
+ track->metadata = gst_media_info_find_metadata (info);
+ if (flags & GST_MEDIA_INFO_STREAMINFO)
+ track->streaminfo = gst_media_info_find_streaminfo (info);
+ if (flags & GST_MEDIA_INFO_FORMAT)
+ track->format = gst_media_info_find_format (info);
+ stream->tracks = g_list_append (stream->tracks, track);
+ }
+
+ gst_media_info_clear_decoder (info);
+ /* please return it */
+ return stream;
+}
+
+
+/*
+ * FIXME: reset ?
+gboolean gst_media_info_write (GstMediaInfo *media_info,
+ const char *location,
+ GstCaps *media_info);
+ */
+
projects / platform / upstream / gst-plugins-base.git / commitdiff