1/*
2 * Copyright (c) 2004-2007 Marcus Overhagen <marcus@overhagen.de>
3 *
4 * Permission is hereby granted, free of charge, to any person
5 * obtaining a copy of this software and associated documentation
6 * files (the "Software"), to deal in the Software without restriction,
7 * including without limitation the rights to use, copy, modify,
8 * merge, publish, distribute, sublicense, and/or sell copies of
9 * the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be
13 * included in all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
17 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
19 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
20 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25#include <stdio.h>
26#include "pes.h"
27
28
29status_t
30pes_extract(const uint8 *pes_data, size_t pes_size, const uint8 **data, size_t *size)
31{
32	if (pes_size <= 9)
33		return B_ERROR;
34
35	if (pes_data[0] || pes_data[1] || pes_data[2] != 1)
36		return B_ERROR;
37
38	size_t header_size = 9 + pes_data[8];
39
40	if (pes_size <= header_size)
41		return B_ERROR;
42
43//	printf("header size %d\n", header_size);
44
45	pes_data += header_size;
46	pes_size -= header_size;
47
48	*data = pes_data;
49	*size = pes_size;
50
51	return B_OK;
52}
53
54
55status_t
56pes_stream_id(const uint8 *pes_data, size_t pes_size, int *stream_id)
57{
58	if (pes_size <= 9)
59		return B_ERROR;
60
61	if (pes_data[0] || pes_data[1] || pes_data[2] != 1)
62		return B_ERROR;
63
64	*stream_id = pes_data[3];
65
66	return B_OK;
67}
68
69