e5f4645c125092b97695e62ce4558b9b24d8ff05
[libav.git] / libavformat / riff.h
1 /*
2 * RIFF common functions and data
3 * copyright (c) 2000 Fabrice Bellard
4 *
5 * This file is part of Libav.
6 *
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 /**
23 * @file
24 * internal header for RIFF based (de)muxers
25 * do NOT include this in end user applications
26 */
27
28 #ifndef AVFORMAT_RIFF_H
29 #define AVFORMAT_RIFF_H
30
31 #include "libavcodec/avcodec.h"
32 #include "avio.h"
33 #include "internal.h"
34 #include "metadata.h"
35
36 extern const AVMetadataConv ff_riff_info_conv[];
37
38 int64_t ff_start_tag(AVIOContext *pb, const char *tag);
39 void ff_end_tag(AVIOContext *pb, int64_t start);
40
41 /**
42 * Read BITMAPINFOHEADER structure and set AVStream codec width, height and
43 * bits_per_encoded_sample fields. Does not read extradata.
44 * Writes the size of the BMP file to *size.
45 * @return codec tag
46 */
47 int ff_get_bmp_header(AVIOContext *pb, AVStream *st, uint32_t *size);
48
49 void ff_put_bmp_header(AVIOContext *pb, AVCodecParameters *par, const AVCodecTag *tags, int for_asf);
50 int ff_put_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par);
51 enum AVCodecID ff_wav_codec_get_id(unsigned int tag, int bps);
52 int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, int size);
53
54 extern const AVCodecTag ff_codec_bmp_tags[];
55 extern const AVCodecTag ff_codec_wav_tags[];
56
57 void ff_parse_specific_params(AVStream *st, int *au_rate, int *au_ssize, int *au_scale);
58
59 int ff_read_riff_info(AVFormatContext *s, int64_t size);
60
61 /**
62 * Write all recognized RIFF tags from s->metadata
63 */
64 void ff_riff_write_info(AVFormatContext *s);
65
66 /**
67 * Write a single RIFF info tag
68 */
69 void ff_riff_write_info_tag(AVIOContext *pb, const char *tag, const char *str);
70
71 typedef uint8_t ff_asf_guid[16];
72
73 typedef struct AVCodecGuid {
74 enum AVCodecID id;
75 ff_asf_guid guid;
76 } AVCodecGuid;
77
78 extern const AVCodecGuid ff_codec_wav_guids[];
79
80 #define FF_PRI_GUID \
81 "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x"
82
83 #define FF_ARG_GUID(g) \
84 g[0], g[1], g[2], g[3], g[4], g[5], g[6], g[7], \
85 g[8], g[9], g[10], g[11], g[12], g[13], g[14], g[15]
86
87 #define FF_MEDIASUBTYPE_BASE_GUID \
88 0x00, 0x00, 0x10, 0x00, 0x80, 0x00, 0x00, 0xAA, 0x00, 0x38, 0x9B, 0x71
89
90 static av_always_inline int ff_guidcmp(const void *g1, const void *g2)
91 {
92 return memcmp(g1, g2, sizeof(ff_asf_guid));
93 }
94
95 static av_always_inline int ff_get_guid(AVIOContext *s, ff_asf_guid *g)
96 {
97 return avio_read(s, *g, sizeof(*g));
98 }
99
100 enum AVCodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid);
101
102 #endif /* AVFORMAT_RIFF_H */