[FFmpeg-devel] [PATCH 5/8] lavd: add device capabilities API

Lukasz Marek lukasz.m.luki2 at gmail.com
Thu Apr 10 02:11:56 CEST 2014


>
> /**
> + * Following API allows user to probe device capabilities (supported
> codecs,
> + * pixel formats, sample formats, resolutions, channel counts, etc).
> + * It is build on top op AVOption API.
> + * Queried capabilities allows to set up converters of video or audio
> + * parameters that fit to the device.
> + *
> + * List of capablities that can be queried:
> + *  - Capabilities valid for both audio and video devices:
> + *    - codec:          supported audio/video codecs.
> + *                      type: AV_OPT_TYPE_INT (AVCodecID value)
> + *  - Capabilities valid for audio devices:
> + *    - sample_format:  supported sample formats.
> + *                      type: AV_OPT_TYPE_INT (AVSampleFormat value)
> + *    - sample_rate:    supported sample rates.
> + *                      type: AV_OPT_TYPE_INT
> + *    - channels:       supported number of channels.
> + *                      type: AV_OPT_TYPE_INT
> + *    - channel_layout: supported channel layouts.
> + *                      type: AV_OPT_TYPE_INT64
>
> Following should be: *  - Capabilities valid for video devices:

yes, fixed locallly, thx

> + *  - Capabilities valid for audio devices:
>
> + *    - pixel_format:   supported pixel formats.
> + *                      type: AV_OPT_TYPE_INT (AVPixelFormat value)
> + *    - window_size:    supported window sizes (describes size of the
> window size presented to the user).
> + *                      type: AV_OPT_TYPE_IMAGE_SIZE
> + *    - frame_size:     supported frame sizes (describes size of
> provided video frames).
> + *                      type: AV_OPT_TYPE_IMAGE_SIZE
> + *    - fps:            supported fps values
> + *                      type: AV_OPT_TYPE_RATIONAL
>
> FPS can be a range for capture devices

It can be a range by now.



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