flowly_flv/
tag.rs

1pub mod audio;
2pub mod meta;
3pub mod video;
4
5/// The FLV tag has three types: `script tag`, `audio tag` and `video tag`.
6/// Each tag contains tag header and tag data.
7/// The structure of each type of tag header is the same.
8#[derive(Clone, Debug, PartialEq)]
9pub struct FlvTag {
10    /// The header part of FLV tag.
11    pub header: FlvTagHeader,
12
13    /// Data specific for each media type:
14    /// * 8 = audio data.
15    /// * 9 = video data.
16    /// * 18 = script data.
17    pub data: FlvTagData,
18}
19
20/// The type of FLV tag.
21#[derive(Copy, Clone, Debug, Eq, PartialEq)]
22pub enum FlvTagType {
23    /// Audio tag type.
24    Audio,
25
26    /// Video tag type.
27    Video,
28
29    /// Script tag type.
30    Metadata,
31
32    // Unknown
33    Unknown(u8),
34}
35
36impl From<u8> for FlvTagType {
37    fn from(value: u8) -> Self {
38        match value {
39            8 => FlvTagType::Audio,
40            9 => FlvTagType::Video,
41            18 => FlvTagType::Metadata,
42            t => FlvTagType::Unknown(t),
43        }
44    }
45}
46
47impl From<FlvTagType> for u8 {
48    fn from(value: FlvTagType) -> Self {
49        match value {
50            FlvTagType::Audio => 8,
51            FlvTagType::Video => 9,
52            FlvTagType::Metadata => 18,
53            FlvTagType::Unknown(v) => v,
54        }
55    }
56}
57
58/// The tag header part of FLV tag.
59#[derive(Copy, Clone, Debug, Eq, PartialEq)]
60pub struct FlvTagHeader {
61    /// Reserved    2 bits  Reserved for FMS, should be 0.
62    /// Filter      1 bit   Indicates if packets are filtered.
63    ///                     0 = No pre-processing required
64    ///                     1 = Pre-processing (Such as decryption) of the packet
65    ///                         is required before it can be rendered.
66    /// TagType     5 bits  The type of contents in this tag,
67    ///                     8 = audio, 9 = video, 18 = script.
68    pub tag_type: FlvTagType,
69
70    /// The size of the tag's data part, 3 bytes.
71    pub data_size: u32,
72
73    /// The timestamp (in milliseconds) of the tag, Timestamp (3 bytes) + TimestampExtended (1 byte).
74    pub timestamp: u32,
75
76    /// The id of stream is always 0, 3 bytes.
77    pub stream_id: u32,
78}
79
80/// The tag data part of FLV tag.
81#[derive(Clone, Debug, PartialEq)]
82pub enum FlvTagData {
83    /// Audio tag data.
84    Audio(audio::AudioTag),
85
86    /// Video tag data.
87    Video(video::VideoTag),
88
89    /// Script tag data.
90    Meta(meta::MetaTag),
91
92    /// Unknown
93    Unknown,
94}
flowly_flv/tag.rs

flowly_flv/
tag.rs
