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572366e179
Thanks to Felipe Contreras for the suggestion. This is partially based on his patches and makes flacparse more than 3.5 times faster. Looking for valid frame headers is unlikely to give false positives because every frame header is at least 9 bytes long, contains a 14 bit sync code and a 8 bit checksum over the first 8 bytes. Fixes bug #631200.
92 lines
2.7 KiB
C
92 lines
2.7 KiB
C
/* GStreamer
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*
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* Copyright (C) 2008 Sebastian Dröge <sebastian.droege@collabora.co.uk>.
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* Copyright (C) 2009 Mark Nauwelaerts <mark.nauwelaerts@collabora.co.uk>
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* Copyright (C) 2009 Nokia Corporation. All rights reserved.
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* Contact: Stefan Kost <stefan.kost@nokia.com>
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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_FLAC_PARSE_H__
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#define __GST_FLAC_PARSE_H__
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#include <gst/gst.h>
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#include "gstbaseparse.h"
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G_BEGIN_DECLS
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#define GST_TYPE_FLAC_PARSE (gst_flac_parse_get_type())
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#define GST_FLAC_PARSE(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_FLAC_PARSE,GstFlacParse))
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#define GST_FLAC_PARSE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_FLAC_PARSE,GstFlacParseClass))
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#define GST_FLAC_PARSE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj),GST_TYPE_FLAC_PARSE,GstFlacParseClass))
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#define GST_IS_FLAC_PARSE(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_FLAC_PARSE))
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#define GST_IS_FLAC_PARSE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_FLAC_PARSE))
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#define GST_FLAC_PARSE_CAST(obj) ((GstFlacParse *)(obj))
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typedef struct _GstFlacParse GstFlacParse;
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typedef struct _GstFlacParseClass GstFlacParseClass;
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typedef enum {
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GST_FLAC_PARSE_STATE_INIT,
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GST_FLAC_PARSE_STATE_HEADERS,
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GST_FLAC_PARSE_STATE_GENERATE_HEADERS,
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GST_FLAC_PARSE_STATE_DATA
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} GstFlacParseState;
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typedef struct {
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guint8 type;
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} GstFlacParseSubFrame;
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struct _GstFlacParse {
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GstBaseParse parent;
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/* Properties */
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gboolean check_frame_checksums;
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GstFlacParseState state;
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gint64 upstream_length;
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/* STREAMINFO content */
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guint16 min_blocksize, max_blocksize;
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guint32 min_framesize, max_framesize;
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guint32 samplerate;
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guint8 channels;
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guint8 bps;
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guint64 total_samples;
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/* Current frame */
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guint64 offset;
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guint8 blocking_strategy;
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guint16 block_size;
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guint64 sample_number;
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GstTagList *tags;
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GList *headers;
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};
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struct _GstFlacParseClass {
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GstBaseParseClass parent_class;
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};
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GType gst_flac_parse_get_type (void);
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G_END_DECLS
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#endif /* __GST_FLAC_PARSE_H__ */
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