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Diffstat (limited to 'ext/metadata/gstbasemetadata.h')
| -rw-r--r-- | ext/metadata/gstbasemetadata.h | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/ext/metadata/gstbasemetadata.h b/ext/metadata/gstbasemetadata.h new file mode 100644 index 00000000..4389cf90 --- /dev/null +++ b/ext/metadata/gstbasemetadata.h @@ -0,0 +1,164 @@ +/* + * GStreamer + * Copyright 2007 Edgard Lima <edgard.lima@indt.org.br> + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + * Alternatively, the contents of this file may be used under the + * GNU Lesser General Public License Version 2.1 (the "LGPL"), in + * which case the following provisions apply instead of the ones + * mentioned above: + * + * 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. + */ + +#ifndef __GST_BASE_METADATA_H__ +#define __GST_BASE_METADATA_H__ + +#include <gst/gst.h> + +#include "gstmetadatacommon.h" + +G_BEGIN_DECLS + +/* #defines don't like whitespacey bits */ +#define GST_TYPE_BASE_METADATA (gst_base_metadata_get_type()) +#define GST_BASE_METADATA(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_BASE_METADATA,GstBaseMetadata)) +#define GST_BASE_METADATA_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_BASE_METADATA,GstBaseMetadataClass)) +#define GST_BASE_METADATA_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_BASE_METADATA, GstBaseMetadataClass)) +#define GST_IS_BASE_METADATA(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_BASE_METADATA)) +#define GST_IS_BASE_METADATA_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_BASE_METADATA)) +#define GST_BASE_METADATA_CAST(obj) ((GstBaseMetadata *)(obj)) + +typedef struct _GstBaseMetadata GstBaseMetadata; +typedef struct _GstBaseMetadataClass GstBaseMetadataClass; + +typedef enum _tag_BaseMetadataType { + BASE_METADATA_DEMUXING, + BASE_METADATA_MUXING +} BaseMetadataType; + + +/** + * GST_BASE_METADATA_SRC_PAD: + * @obj: base metadata instance + * + * Gives the pointer to the #GstPad object of the element. + */ +#define GST_BASE_METADATA_SRC_PAD(obj) (GST_BASE_METADATA_CAST (obj)->srcpad) + +/** + * GST_BASE_METADATA_SINK_PAD: + * @obj: base metadata instance + * + * Gives the pointer to the #GstPad object of the element. + */ +#define GST_BASE_METADATA_SINK_PAD(obj) (GST_BASE_METADATA_CAST (obj)->sinkpad) + +#define GST_BASE_METADATA_EXIF_ADAPTER(obj) (GST_BASE_METADATA_CAST (obj)->common.metadata.exif_adapter) +#define GST_BASE_METADATA_IPTC_ADAPTER(obj) (GST_BASE_METADATA_CAST (obj)->common.metadata.iptc_adapter) +#define GST_BASE_METADATA_XMP_ADAPTER(obj) (GST_BASE_METADATA_CAST (obj)->common.metadata.xmp_adapter) + +#define GST_BASE_METADATA_IMG_TYPE(obj) (GST_BASE_METADATA_CAST (obj)->img_type) + + +/** + * GstBaseMetadata: + * @element: the parent element. + * + * The opaque #GstBaseMetadata data structure. + */ +struct _GstBaseMetadata +{ + GstElement element; + + /*< protected >*/ + GstPad *sinkpad, *srcpad; + + /*< private >*/ + GstMetadataCommon common; + + MetaOptions options; + + gboolean need_processing; + + GstAdapter *adapter_parsing; + GstAdapter *adapter_holding; + guint32 next_offset; + guint32 next_size; + ImageType img_type; + + gint64 offset_orig; /* offset in original stream */ + gint64 offset; /* offset in current stream */ + + GstBuffer * prepend_buffer; + + gboolean need_more_data; + +}; + +struct _GstBaseMetadataClass +{ + GstElementClass parent_class; + + void (*processing) (GstBaseMetadata *basemetadata); + + gboolean (*set_caps) (GstPad * pad, GstCaps * caps); + + GstCaps* (*get_src_caps) (GstPad * pad); + GstCaps* (*get_sink_caps) (GstPad * pad); + + gboolean (*sink_event) (GstPad * pad, GstEvent * event); + +}; + +extern GType +gst_base_metadata_get_type (void); + +extern void +gst_base_metadata_set_option_flag(GstBaseMetadata *metadata, const MetaOptions options); + +extern void +gst_base_metadata_unset_option_flag(GstBaseMetadata *metadata, const MetaOptions options); + +extern MetaOptions +gst_base_metadata_get_option_flag(const GstBaseMetadata *metadata); + +extern void +gst_base_metadata_update_segment_with_new_buffer (GstBaseMetadata *metadata, + guint8 ** buf, guint32 * size, MetadataChunkType type); + +extern void +gst_base_metadata_chunk_array_remove_zero_size (GstBaseMetadata *metadata); + +G_END_DECLS +#endif /* __GST_BASE_METADATA_H__ */ |