FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
riff.h
Go to the documentation of this file.
1 /*
2  * RIFF common functions and data
3  * copyright (c) 2000 Fabrice Bellard
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg 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  * FFmpeg 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 FFmpeg; 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 extern const char ff_riff_tags[][5];
38 
39 int64_t ff_start_tag(AVIOContext *pb, const char *tag);
40 void ff_end_tag(AVIOContext *pb, int64_t start);
41 
42 /**
43  * Read BITMAPINFOHEADER structure and set AVStream codec width, height and
44  * bits_per_encoded_sample fields. Does not read extradata.
45  * @return codec tag
46  */
47 int ff_get_bmp_header(AVIOContext *pb, AVStream *st, unsigned *esize);
48 
49 void ff_put_bmp_header(AVIOContext *pb, AVCodecContext *enc, const AVCodecTag *tags, int for_asf);
51 enum AVCodecID ff_wav_codec_get_id(unsigned int tag, int bps);
52 int ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size);
53 
54 extern const AVCodecTag ff_codec_bmp_tags[]; // exposed through avformat_get_riff_video_tags()
55 extern const AVCodecTag ff_codec_wav_tags[];
56 
57 void ff_parse_specific_params(AVCodecContext *stream, int *au_rate, int *au_ssize, int *au_scale);
58 
60 
61 /**
62  * Write all recognized RIFF tags from s->metadata
63  */
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;
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 
96 
97 enum AVCodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid);
98 
99 #endif /* AVFORMAT_RIFF_H */