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riff.h
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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 
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  * @return codec tag
45  */
46 int ff_get_bmp_header(AVIOContext *pb, AVStream *st, unsigned *esize);
47 
48 void ff_put_bmp_header(AVIOContext *pb, AVCodecContext *enc, const AVCodecTag *tags, int for_asf, int ignore_extradata);
49 
50 /**
51  * Tell ff_put_wav_header() to use WAVEFORMATEX even for PCM codecs.
52  */
53 #define FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX 0x00000001
54 
55 /**
56  * Write WAVEFORMAT header structure.
57  *
58  * @param flags a combination of FF_PUT_WAV_HEADER_* constants
59  *
60  * @return the size or -1 on error
61  */
63 
64 enum AVCodecID ff_wav_codec_get_id(unsigned int tag, int bps);
65 int ff_get_wav_header(AVIOContext *pb, AVCodecContext *codec, int size, int big_endian);
66 
67 extern const AVCodecTag ff_codec_bmp_tags[]; // exposed through avformat_get_riff_video_tags()
68 extern const AVCodecTag ff_codec_wav_tags[];
69 
70 void ff_parse_specific_params(AVStream *st, int *au_rate, int *au_ssize, int *au_scale);
71 
73 
74 /**
75  * Write all recognized RIFF tags from s->metadata
76  */
78 
79 /**
80  * Write a single RIFF info tag
81  */
82 void ff_riff_write_info_tag(AVIOContext *pb, const char *tag, const char *str);
83 
84 typedef uint8_t ff_asf_guid[16];
85 
86 typedef struct AVCodecGuid {
87  enum AVCodecID id;
89 } AVCodecGuid;
90 
91 extern const AVCodecGuid ff_codec_wav_guids[];
92 
93 #define FF_PRI_GUID \
94  "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x " \
95  "{%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x}"
96 
97 #define FF_ARG_GUID(g) \
98  g[0], g[1], g[2], g[3], g[4], g[5], g[6], g[7], \
99  g[8], g[9], g[10], g[11], g[12], g[13], g[14], g[15],\
100  g[3], g[2], g[1], g[0], g[5], g[4], g[7], g[6], \
101  g[8], g[9], g[10], g[11], g[12], g[13], g[14], g[15]
102 
103 #define FF_MEDIASUBTYPE_BASE_GUID \
104  0x00, 0x00, 0x10, 0x00, 0x80, 0x00, 0x00, 0xAA, 0x00, 0x38, 0x9B, 0x71
105 
106 static av_always_inline int ff_guidcmp(const void *g1, const void *g2)
107 {
108  return memcmp(g1, g2, sizeof(ff_asf_guid));
109 }
110 
112 void ff_put_guid(AVIOContext *s, const ff_asf_guid *g);
113 const ff_asf_guid *get_codec_guid(enum AVCodecID id, const AVCodecGuid *av_guid);
114 
115 enum AVCodecID ff_codec_guid_get_id(const AVCodecGuid *guids, ff_asf_guid guid);
116 
117 #endif /* AVFORMAT_RIFF_H */