Function rsmpeg::ffi::av_hwdevice_ctx_create

pub unsafe extern "C" fn av_hwdevice_ctx_create(
    device_ctx: *mut *mut AVBufferRef, 
    type_: u32, 
    device: *const i8, 
    opts: *mut AVDictionary, 
    flags: i32
) -> i32

Open a device of the specified type and create an AVHWDeviceContext for it.

This is a convenience function intended to cover the simple cases. Callers who need to fine-tune device creation/management should open the device manually and then wrap it in an AVHWDeviceContext using av_hwdevice_ctx_alloc()/av_hwdevice_ctx_init().

The returned context is already initialized and ready for use, the caller should not call av_hwdevice_ctx_init() on it. The user_opaque/free fields of the created AVHWDeviceContext are set by this function and should not be touched by the caller.

@param device_ctx On success, a reference to the newly-created device context will be written here. The reference is owned by the caller and must be released with av_buffer_unref() when no longer needed. On failure, NULL will be written to this pointer. @param type The type of the device to create. @param device A type-specific string identifying the device to open. @param opts A dictionary of additional (type-specific) options to use in opening the device. The dictionary remains owned by the caller. @param flags currently unused

@return 0 on success, a negative AVERROR code on failure.