webm_sys/
lib.rs

1pub mod mux {
2    use core::ffi::{c_char, c_void};
3    use core::ptr::NonNull;
4
5    #[repr(C)]
6    pub struct IWriter {
7        _opaque_c_aligned: *mut c_void,
8    }
9    pub type WriterMutPtr = *mut IWriter;
10    pub type WriterNonNullPtr = NonNull<IWriter>;
11
12    pub type WriterWriteFn = extern "C" fn(*mut c_void, *const c_void, usize) -> bool;
13    pub type WriterGetPosFn = extern "C" fn(*mut c_void) -> u64;
14    pub type WriterSetPosFn = extern "C" fn(*mut c_void, u64) -> bool;
15    pub type WriterElementStartNotifyFn = extern "C" fn(*mut c_void, u64, i64);
16
17    /// An opaque number used to identify an added track.
18    pub type TrackNum = u64;
19
20    #[derive(Debug, Clone, Copy, PartialEq, Eq)]
21    #[repr(i32)]
22    pub enum ResultCode {
23        /// The function completed without error
24        Ok = 0,
25
26        /// An invalid parameter was passed (e.g. a null pointer or an invalid track number)
27        BadParam = -1,
28
29        /// `libwebm` returned an error, and no more specific error info is known. No assumptions
30        /// should be made about whether this is an issue with the caller, or something internal
31        /// to `libwebm`.
32        UnknownLibwebmError = -2,
33    }
34
35    // audio
36    pub const OPUS_CODEC_ID: u32 = 0;
37    pub const VORBIS_CODEC_ID: u32 = 1;
38
39    // video
40    pub const VP8_CODEC_ID: u32 = 0;
41    pub const VP9_CODEC_ID: u32 = 1;
42    pub const AV1_CODEC_ID: u32 = 2;
43
44    // segment modes
45    pub const SEGMENT_MODE_LIVE: u32 = 0x1;
46    pub const SEGMENT_MODE_FILE: u32 = 0x2;
47
48    #[repr(C)]
49    pub struct Segment {
50        _opaque_c_aligned: *mut c_void,
51    }
52    pub type SegmentMutPtr = *mut Segment;
53    pub type SegmentNonNullPtr = NonNull<Segment>;
54
55    #[link(name = "webmadapter", kind = "static")]
56    unsafe extern "C" {
57        #[link_name = "mux_new_writer"]
58        pub fn new_writer(
59            write: Option<WriterWriteFn>,
60            get_pos: Option<WriterGetPosFn>,
61            set_pos: Option<WriterSetPosFn>,
62            element_start_notify: Option<WriterElementStartNotifyFn>,
63            user_data: *mut c_void,
64        ) -> WriterMutPtr;
65        #[link_name = "mux_delete_writer"]
66        pub fn delete_writer(writer: WriterMutPtr);
67
68        #[link_name = "mux_new_segment"]
69        pub fn new_segment() -> SegmentMutPtr;
70        #[link_name = "mux_initialize_segment"]
71        pub fn initialize_segment(segment: SegmentMutPtr, writer: WriterMutPtr) -> ResultCode;
72        #[link_name = "mux_set_color"]
73        pub fn mux_set_color(
74            segment: SegmentMutPtr,
75            video_track_num: TrackNum,
76            bits_per_channel: u8,
77            sampling_horiz: u8,
78            sampling_vert: u8,
79            color_range: u8,
80        ) -> ResultCode;
81        #[link_name = "mux_set_writing_app"]
82        pub fn mux_set_writing_app(segment: SegmentMutPtr, name: *const c_char);
83        #[link_name = "mux_finalize_segment"]
84        pub fn finalize_segment(segment: SegmentMutPtr, duration: u64) -> ResultCode;
85        #[link_name = "mux_delete_segment"]
86        pub fn delete_segment(segment: SegmentMutPtr);
87        #[link_name = "mux_segment_set_mode"]
88        pub fn segment_set_mode(segment: SegmentMutPtr, mode: u32) -> ResultCode;
89
90        #[link_name = "mux_segment_add_video_track"]
91        pub fn segment_add_video_track(
92            segment: SegmentMutPtr,
93            width: i32,
94            height: i32,
95            number: i32,
96            codec_id: u32,
97            track_num_out: *mut TrackNum,
98        ) -> ResultCode;
99        #[link_name = "mux_segment_add_audio_track"]
100        pub fn segment_add_audio_track(
101            segment: SegmentMutPtr,
102            sample_rate: i32,
103            channels: i32,
104            number: i32,
105            codec_id: u32,
106            track_num_out: *mut TrackNum,
107        ) -> ResultCode;
108        #[link_name = "mux_segment_add_frame"]
109        pub fn segment_add_frame(
110            segment: SegmentMutPtr,
111            track_num: TrackNum,
112            frame: *const u8,
113            length: usize,
114            timestamp_ns: u64,
115            keyframe: bool,
116        ) -> ResultCode;
117        #[link_name = "mux_segment_set_codec_private"]
118        pub fn segment_set_codec_private(
119            segment: SegmentMutPtr,
120            track_num: TrackNum,
121            data: *const u8,
122            len: i32,
123        ) -> ResultCode;
124    }
125}
126
127#[test]
128fn smoke_test() {
129    unsafe {
130        let segment = mux::new_segment();
131        assert!(!segment.is_null());
132        mux::delete_segment(segment);
133    }
134}
webm_sys/lib.rs

webm_sys/
lib.rs
