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    #[repr(C)]
45    pub struct Segment {
46        _opaque_c_aligned: *mut c_void,
47    }
48    pub type SegmentMutPtr = *mut Segment;
49    pub type SegmentNonNullPtr = NonNull<Segment>;
50
51    #[link(name = "webmadapter", kind = "static")]
52    unsafe extern "C" {
53        #[link_name = "mux_new_writer"]
54        pub fn new_writer(
55            write: Option<WriterWriteFn>,
56            get_pos: Option<WriterGetPosFn>,
57            set_pos: Option<WriterSetPosFn>,
58            element_start_notify: Option<WriterElementStartNotifyFn>,
59            user_data: *mut c_void,
60        ) -> WriterMutPtr;
61        #[link_name = "mux_delete_writer"]
62        pub fn delete_writer(writer: WriterMutPtr);
63
64        #[link_name = "mux_new_segment"]
65        pub fn new_segment() -> SegmentMutPtr;
66        #[link_name = "mux_initialize_segment"]
67        pub fn initialize_segment(segment: SegmentMutPtr, writer: WriterMutPtr) -> ResultCode;
68        #[link_name = "mux_set_color"]
69        pub fn mux_set_color(
70            segment: SegmentMutPtr,
71            video_track_num: TrackNum,
72            bits_per_channel: u8,
73            sampling_horiz: u8,
74            sampling_vert: u8,
75            color_range: u8,
76        ) -> ResultCode;
77        #[link_name = "mux_set_writing_app"]
78        pub fn mux_set_writing_app(segment: SegmentMutPtr, name: *const c_char);
79        #[link_name = "mux_finalize_segment"]
80        pub fn finalize_segment(segment: SegmentMutPtr, duration: u64) -> ResultCode;
81        #[link_name = "mux_delete_segment"]
82        pub fn delete_segment(segment: SegmentMutPtr);
83
84        #[link_name = "mux_segment_add_video_track"]
85        pub fn segment_add_video_track(
86            segment: SegmentMutPtr,
87            width: i32,
88            height: i32,
89            number: i32,
90            codec_id: u32,
91            track_num_out: *mut TrackNum,
92        ) -> ResultCode;
93        #[link_name = "mux_segment_add_audio_track"]
94        pub fn segment_add_audio_track(
95            segment: SegmentMutPtr,
96            sample_rate: i32,
97            channels: i32,
98            number: i32,
99            codec_id: u32,
100            track_num_out: *mut TrackNum,
101        ) -> ResultCode;
102        #[link_name = "mux_segment_add_frame"]
103        pub fn segment_add_frame(
104            segment: SegmentMutPtr,
105            track_num: TrackNum,
106            frame: *const u8,
107            length: usize,
108            timestamp_ns: u64,
109            keyframe: bool,
110        ) -> ResultCode;
111        #[link_name = "mux_segment_set_codec_private"]
112        pub fn segment_set_codec_private(
113            segment: SegmentMutPtr,
114            track_num: TrackNum,
115            data: *const u8,
116            len: i32,
117        ) -> ResultCode;
118    }
119}
120
121#[test]
122fn smoke_test() {
123    unsafe {
124        let segment = mux::new_segment();
125        assert!(!segment.is_null());
126        mux::delete_segment(segment);
127    }
128}
webm_sys/lib.rs

webm_sys/
lib.rs
