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101 lines
3.1 KiB
C
101 lines
3.1 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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* Copyright (C) <2004> Thomas Vander Stichele <thomas at apestaart dot org>
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*
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* dataprotocol.h: Functions implementing the GStreamer Data Protocol
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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_DATA_PROTOCOL_H__
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#define __GST_DATA_PROTOCOL_H__
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#include <gst/gstdata.h>
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#include <gst/gstbuffer.h>
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#include <gst/gstevent.h>
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#include <gst/gstcaps.h>
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G_BEGIN_DECLS
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/* GStreamer Data Protocol Version */
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#define GST_DP_VERSION_MAJOR 0
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#define GST_DP_VERSION_MINOR 0
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#define GST_DP_HEADER_LENGTH 60 /* header size in bytes */
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/* header flags */
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typedef enum {
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GST_DP_HEADER_FLAG_NONE = 0,
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GST_DP_HEADER_FLAG_CRC_HEADER = (1 << 0),
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GST_DP_HEADER_FLAG_CRC_PAYLOAD = (1 << 1),
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GST_DP_HEADER_FLAG_CRC = (1 << 1) | (1 <<0),
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} GstDPHeaderFlag;
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/* payload types */
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typedef enum {
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GST_DP_PAYLOAD_NONE = 0,
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GST_DP_PAYLOAD_BUFFER,
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GST_DP_PAYLOAD_CAPS,
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GST_DP_PAYLOAD_EVENT_NONE = 64,
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} GstDPPayloadType;
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/* payload information from header */
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guint32 gst_dp_header_payload_length (const guint8 * header);
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GstDPPayloadType
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gst_dp_header_payload_type (const guint8 * header);
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/* converting from GstBuffer/GstEvent/GstCaps */
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gboolean gst_dp_header_from_buffer (const GstBuffer * buffer,
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GstDPHeaderFlag flags,
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guint * length,
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guint8 ** header);
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gboolean gst_dp_packet_from_caps (const GstCaps * caps,
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GstDPHeaderFlag flags,
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guint * length,
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guint8 ** header,
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guint8 ** payload);
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gboolean gst_dp_packet_from_event (const GstEvent * event,
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GstDPHeaderFlag flags,
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guint * length,
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guint8 ** header,
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guint8 ** payload);
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/* converting to GstBuffer/GstEvent/GstCaps */
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GstBuffer * gst_dp_buffer_from_header (guint header_length,
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const guint8 * header);
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GstCaps * gst_dp_caps_from_packet (guint header_length,
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const guint8 * header,
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const guint8 * payload);
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GstEvent * gst_dp_event_from_packet (guint header_length,
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const guint8 * header,
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const guint8 * payload);
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/* validation */
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gboolean gst_dp_validate_header (guint header_length,
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const guint8 * header);
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gboolean gst_dp_validate_payload (guint header_length,
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const guint8 * header,
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const guint8 * payload);
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gboolean gst_dp_validate_packet (guint header_length,
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const guint8 * header,
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const guint8 * payload);
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G_END_DECLS
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#endif /* __GST_DATA_PROTOCOL_H__ */
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