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105 lines
3.8 KiB
C
105 lines
3.8 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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*
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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_BIT_READER_H__
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#define __GST_BIT_READER_H__
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#include <gst/gst.h>
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/* FIXME: inline functions */
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G_BEGIN_DECLS
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#define GST_BIT_READER(reader) ((GstBitReader *) (reader))
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/**
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* GstBitReader:
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* @data: Data from which the bit reader will read
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* @size: Size of @data in bytes
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* @byte: Current byte position
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* @bit: Bit position in the current byte
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*
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* A bit reader instance.
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*/
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typedef struct {
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const guint8 *data;
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guint size;
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guint byte; /* Byte position */
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guint bit; /* Bit position in the current byte */
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} GstBitReader;
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GstBitReader * gst_bit_reader_new (const guint8 *data, guint size);
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GstBitReader * gst_bit_reader_new_from_buffer (const GstBuffer *buffer);
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void gst_bit_reader_free (GstBitReader *reader);
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void gst_bit_reader_init (GstBitReader *reader, const guint8 *data, guint size);
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void gst_bit_reader_init_from_buffer (GstBitReader *reader, const GstBuffer *buffer);
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gboolean gst_bit_reader_set_pos (GstBitReader *reader, guint pos);
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guint gst_bit_reader_get_pos (const GstBitReader *reader);
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guint gst_bit_reader_get_remaining (const GstBitReader *reader);
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guint gst_bit_reader_get_size (const GstBitReader *reader);
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gboolean gst_bit_reader_skip (GstBitReader *reader, guint nbits);
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gboolean gst_bit_reader_skip_to_byte (GstBitReader *reader);
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gboolean gst_bit_reader_get_bits_uint8 (GstBitReader *reader, guint8 *val, guint nbits);
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gboolean gst_bit_reader_get_bits_uint16 (GstBitReader *reader, guint16 *val, guint nbits);
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gboolean gst_bit_reader_get_bits_uint32 (GstBitReader *reader, guint32 *val, guint nbits);
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gboolean gst_bit_reader_get_bits_uint64 (GstBitReader *reader, guint64 *val, guint nbits);
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gboolean gst_bit_reader_peek_bits_uint8 (const GstBitReader *reader, guint8 *val, guint nbits);
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gboolean gst_bit_reader_peek_bits_uint16 (const GstBitReader *reader, guint16 *val, guint nbits);
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gboolean gst_bit_reader_peek_bits_uint32 (const GstBitReader *reader, guint32 *val, guint nbits);
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gboolean gst_bit_reader_peek_bits_uint64 (const GstBitReader *reader, guint64 *val, guint nbits);
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/**
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* GST_BIT_READER_INIT:
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* @data: Data from which the #GstBitReader should read
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* @size: Size of @data in bytes
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*
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* A #GstBitReader must be initialized with this macro, before it can be
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* used. This macro can used be to initialize a variable, but it cannot
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* be assigned to a variable. In that case you have to use
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* gst_bit_reader_init().
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*
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* Since: 0.10.22
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*/
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#define GST_BIT_READER_INIT(data, size) {data, size, 0, 0}
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/**
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* GST_BIT_READER_INIT_FROM_BUFFER:
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* @buffer: Buffer from which the #GstBitReader should read
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*
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* A #GstBitReader must be initialized with this macro, before it can be
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* used. This macro can used be to initialize a variable, but it cannot
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* be assigned to a variable. In that case you have to use
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* gst_bit_reader_init().
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*
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* Since: 0.10.22
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*/
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#define GST_BIT_READER_INIT_FROM_BUFFER(buffer) {GST_BUFFER_DATA (buffer), GST_BUFFER_SIZE (buffer), 0, 0}
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G_END_DECLS
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#endif /* __GST_BIT_READER_H__ */
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