gstreamer/gst/rtp/fnv1hash.h

/* GStreamer
 * Copyright (C) 2007 Thomas Vander Stichele <thomas at apestaart dot org>
 *
 * 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_FNV1_HASH_H__
#define __GST_FNV1_HASH_H__

#include <gst/gst.h>
#include <gst/rtp/gstbasertppayload.h>
#include <gst/base/gstadapter.h>

G_BEGIN_DECLS

guint32 fnv1_hash_32_new ();
guint32 fnv1_hash_32_update (guint32 hash, const guchar *data, guint length);
guint32 fnv1_hash_32_to_24 (guint32 hash);

G_END_DECLS

#endif /* __GST_FNV1_HASH_H__ */
gst/rtp/Makefile.am: gst/rtp/fnv1hash.c (MASK_24, FNV1_HASH_32_INIT, FNV1_HASH_32_PRIME, fnv1_hash_32_new, fnv1_hash_... Original commit message from CVS: * gst/rtp/Makefile.am: * gst/rtp/fnv1hash.c (MASK_24, FNV1_HASH_32_INIT, FNV1_HASH_32_PRIME, fnv1_hash_32_new, fnv1_hash_32_update, fnv1_hash_32_to_24): * gst/rtp/fnv1hash.h (__GST_FNV1_HASH_H__): Add a simple hashing implementation that we can use to generate a 24-bit ident value based on the codebooks for vorbis and theora. * gst/rtp/gstrtptheorapay.c (gst_rtp_theora_pay_finish_headers, gst_rtp_theora_pay_handle_buffer): * gst/rtp/gstrtpvorbisdepay.c (gst_rtp_vorbis_depay_parse_configuration, gst_rtp_vorbis_depay_switch_codebook, gst_rtp_vorbis_depay_process): * gst/rtp/gstrtpvorbispay.c (gst_rtp_vorbis_pay_reset_packet, gst_rtp_vorbis_pay_init_packet, gst_rtp_vorbis_pay_flush_packet, gst_rtp_vorbis_pay_finish_headers, gst_rtp_vorbis_pay_handle_buffer): Use the hashing function, ensuring that the same codebooks result in the same ident and thus the same SDP description. Various log fixes/changes. 2007-04-12 11:41:11 +00:00			`/* GStreamer`
			`* Copyright (C) 2007 Thomas Vander Stichele <thomas at apestaart dot org>`
			`*`
			`* 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_FNV1_HASH_H__`
			`#define __GST_FNV1_HASH_H__`

			`#include <gst/gst.h>`
			`#include <gst/rtp/gstbasertppayload.h>`
			`#include <gst/base/gstadapter.h>`

			`G_BEGIN_DECLS`

			`guint32 fnv1_hash_32_new ();`
			`guint32 fnv1_hash_32_update (guint32 hash, const guchar *data, guint length);`
			`guint32 fnv1_hash_32_to_24 (guint32 hash);`

			`G_END_DECLS`

			`#endif /* __GST_FNV1_HASH_H__ */`