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/* GStreamer
*
* Copyright (C) 2009 Carl-Anton Ingmarsson <ca.ingmarsson@gmail.com>.
*
* 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_NAL_READER_H__
#define __GST_NAL_READER_H__
#include <gst/gst.h>
G_BEGIN_DECLS
typedef struct _GstNalReader GstNalReader;
struct _GstNalReader
{
const guint8 *data;
guint size;
guint byte; /* Byte position */
guint bits_in_cache; /* bitpos in the cache of next bit */
guint8 first_byte;
guint64 cache; /* cached bytes */
};
GstNalReader *gst_nal_reader_new (const guint8 *data, guint size);
GstNalReader *gst_nal_reader_new_from_buffer (const GstBuffer *buffer);
void gst_nal_reader_free (GstNalReader * reader);
void gst_nal_reader_init (GstNalReader * reader, const guint8 * data, guint size);
void gst_nal_reader_init_from_buffer (GstNalReader * reader, const GstBuffer * buffer);
gboolean gst_nal_reader_skip (GstNalReader *reader, guint nbits);
gboolean gst_nal_reader_skip_to_byte (GstNalReader *reader);
guint gst_nal_reader_get_pos (const GstNalReader * reader);
guint gst_nal_reader_get_remaining (const GstNalReader *reader);
gboolean gst_nal_reader_get_bits_uint8 (GstNalReader *reader, guint8 *val, guint nbits);
gboolean gst_nal_reader_get_bits_uint16 (GstNalReader *reader, guint16 *val, guint nbits);
gboolean gst_nal_reader_get_bits_uint32 (GstNalReader *reader, guint32 *val, guint nbits);
gboolean gst_nal_reader_get_bits_uint64 (GstNalReader *reader, guint64 *val, guint nbits);
gboolean gst_nal_reader_peek_bits_uint8 (const GstNalReader *reader, guint8 *val, guint nbits);
gboolean gst_nal_reader_peek_bits_uint16 (const GstNalReader *reader, guint16 *val, guint nbits);
gboolean gst_nal_reader_peek_bits_uint32 (const GstNalReader *reader, guint32 *val, guint nbits);
gboolean gst_nal_reader_peek_bits_uint64 (const GstNalReader *reader, guint64 *val, guint nbits);
gboolean gst_nal_reader_get_ue (GstNalReader *reader, guint32 *val);
gboolean gst_nal_reader_peek_ue (const GstNalReader *reader, guint32 *val);
gboolean gst_nal_reader_get_se (GstNalReader *reader, gint32 *val);
gboolean gst_nal_reader_peek_se (const GstNalReader *reader, gint32 *val);
/**
* GST_NAL_READER_INIT:
* @data: Data from which the #GstNalReader should read
* @size: Size of @data in bytes
*
* A #GstNalReader must be initialized with this macro, before it can be
* used. This macro can used be to initialize a variable, but it cannot
* be assigned to a variable. In that case you have to use
* gst_bit_reader_init().
*
* Since: 0.10.22
*/
#define GST_NAL_READER_INIT(data, size) {data, size, 0, 0, 0xff, 0xff}
/**
* GST_NAL_READER_INIT_FROM_BUFFER:
* @buffer: Buffer from which the #GstNalReader should read
*
* A #GstNalReader must be initialized with this macro, before it can be
* used. This macro can used be to initialize a variable, but it cannot
* be assigned to a variable. In that case you have to use
* gst_bit_reader_init().
*
* Since: 0.10.22
*/
#define GST_NAL_READER_INIT_FROM_BUFFER(buffer) {GST_BUFFER_DATA (buffer), GST_BUFFER_SIZE (buffer), 0, 0, 0xff, 0xff}
G_END_DECLS
#endif /* __GST_NAL_READER_H__ */
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