#Module webcodecs_video_decoder

WebCodecs VideoDecoder (src/page/bindings_video_decoder.odin, native/js/runtime/web_webcodecs_video_decoder.c). Wires to the media decoders of src/media behind an honest isConfigSupported. The engine holds the output / error callbacks; a decoded VideoFrame is delivered through the output callback (user, frame handle).

Exposed to: Window, Worker. Source: api/webcodecs_video_decoder.widl.

Odin: import "wren:webcodecs".

#Types

#handle VideoDecoder : Object

Checked by the browser on every call (lookup_VideoDecoder).

#callback VideoDecoderOutput

void VideoDecoderOutput(i32 user, u64 frame)

output(frame) and error(code) callbacks. The frame handle is a VideoFrame the guest must close.

#callback VideoDecoderError

void VideoDecoderError(i32 user, i32 code)

#Functions

#VideoDecoder_create

VideoDecoder VideoDecoder_create(VideoDecoderOutput output, i32 output_user, VideoDecoderError error, i32 error_user) raises

new VideoDecoder({output, error}).

Raises: returns an Error (see web).

Host: VideoDecoder_create :: proc(c: ^Call, output: u32, output_user: i32, error: u32, error_user: i32) -> (u64, Api_Error)

#VideoDecoder_isConfigSupported

bool VideoDecoder_isConfigSupported(string codec)

VideoDecoder.isConfigSupported(config.codec): honest — true only when src/media can decode the codec.

Host: VideoDecoder_isConfigSupported :: proc(c: ^Call, codec: string) -> bool

#VideoDecoder_configure

void VideoDecoder_configure(VideoDecoder decoder, string codec, bytes description, u32 coded_w, u32 coded_h) raises

decoder.configure({codec, description, codedWidth, codedHeight}).

Raises: returns an Error (see web).

Host: VideoDecoder_configure :: proc(c: ^Call, decoder: Api_VideoDecoder, codec: string, description: []u8, coded_w: u32, coded_h: u32) -> Api_Error

#VideoDecoder_decode

void VideoDecoder_decode(VideoDecoder decoder, bool key, i64 timestamp, i64 duration, bool has_duration, bytes data) raises

decoder.decode(EncodedVideoChunk): the engine passes the chunk's fields and bytes.

Raises: returns an Error (see web).

Host: VideoDecoder_decode :: proc(c: ^Call, decoder: Api_VideoDecoder, key: bool, timestamp: i64, duration: i64, has_duration: bool, data: []u8) -> Api_Error

#VideoDecoder_flush

void VideoDecoder_flush(VideoDecoder decoder) raises

decoder.flush(): drain the pipeline (the engine resolves the promise).

Raises: returns an Error (see web).

Host: VideoDecoder_flush :: proc(c: ^Call, decoder: Api_VideoDecoder) -> Api_Error

#VideoDecoder_reset

void VideoDecoder_reset(VideoDecoder decoder)

Host: VideoDecoder_reset :: proc(c: ^Call, decoder: Api_VideoDecoder)

#VideoDecoder_close

void VideoDecoder_close(VideoDecoder decoder)

Host: VideoDecoder_close :: proc(c: ^Call, decoder: Api_VideoDecoder)

#VideoDecoder_decodeQueueSize

u32 VideoDecoder_decodeQueueSize(VideoDecoder decoder)

Host: VideoDecoder_decodeQueueSize :: proc(c: ^Call, decoder: Api_VideoDecoder) -> u32

#VideoDecoder_state

i32 VideoDecoder_state(VideoDecoder decoder)

0 unconfigured, 1 configured, 2 closed.

Host: VideoDecoder_state :: proc(c: ^Call, decoder: Api_VideoDecoder) -> i32

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