h2645_parse: add support for parsing h264
[libav.git] / libavcodec / h2645_parse.h
1 /*
2 * H.264/HEVC common parsing code
3 *
4 * This file is part of Libav.
5 *
6 * Libav is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * Libav is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with Libav; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #ifndef AVCODEC_H2645_PARSE_H
22 #define AVCODEC_H2645_PARSE_H
23
24 #include <stdint.h>
25
26 #include "avcodec.h"
27 #include "get_bits.h"
28
29 typedef struct H2645NAL {
30 uint8_t *rbsp_buffer;
31 int rbsp_buffer_size;
32
33 int size;
34 const uint8_t *data;
35
36 int raw_size;
37 const uint8_t *raw_data;
38
39 GetBitContext gb;
40
41 /**
42 * NAL unit type
43 */
44 int type;
45
46 /**
47 * HEVC only, nuh_temporal_id_plus_1 - 1
48 */
49 int temporal_id;
50
51 /**
52 * H264 only, nal_ref_idc
53 */
54 int ref_idc;
55 } H2645NAL;
56
57 /* an input packet split into unescaped NAL units */
58 typedef struct H2645Packet {
59 H2645NAL *nals;
60 int nb_nals;
61 int nals_allocated;
62 } H2645Packet;
63
64 /**
65 * Extract the raw (unescaped) bitstream.
66 */
67 int ff_h2645_extract_rbsp(const uint8_t *src, int length,
68 H2645NAL *nal);
69
70 /**
71 * Split an input packet into NAL units.
72 */
73 int ff_h2645_packet_split(H2645Packet *pkt, const uint8_t *buf, int length,
74 void *logctx, int is_nalff, int nal_length_size,
75 enum AVCodecID codec_id);
76
77 /**
78 * Free all the allocated memory in the packet.
79 */
80 void ff_h2645_packet_uninit(H2645Packet *pkt);
81
82 #endif /* AVCODEC_H2645_PARSE_H */