Quoting Soft Works (2021-11-25 03:41:32)
> @@ -687,6 +720,11 @@ int av_hwdevice_ctx_create_derived_opts(AVBufferRef
> **dst_ref_ptr,
> ret = AVERROR(ENOMEM);
> goto fail;
> }
> + tmp_ctx->internal->derived_devices[type] =
> av_buffer_ref(dst_ref);
> + if (!tmp_ctx->internal->derived_devices[type]) {
> + ret = AVERROR(ENOMEM);
> + goto fail;
> + }
This means that once you derive a device of a certain type, you can
never truly close it without also killing the parent device. That
strikes me as
- potentially troublesome
- a behavior change
Also, I don't see it as completely obvious that all derivations should
always return the same child instance.
--
Anton Khirnov
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