Re: [PATCH 0/2] MR9538: winegstreamer: Return S_FALSE from DMO when there is not enough data.

[Yuxuan Shui (＠yshui)]

On Thu Nov 20 08:40:37 2025 +0000, Yuxuan Shui wrote:
> Context: I was trying to make use of DMOs in `WMSyncReader`. I want to
> know if there is data available from a DMO decoder. Maybe there's a
> better way, but intuitively I call `ProcessOutput` and check if it
> returns `S_FALSE`.
> Our DMOs return `MF_E_TRANSFORM_NEED_MORE_INPUT` which is not a
> documented return value for DMOs.

Notes on the test case (on native):

- I also tried adding a test case calling `ProcessOutput` before any `ProcessInput` calls, and I got `E_POINTER`. Don't know what's going on there.
- If I call `ProcessInput` before setting an output type, subsequent `ProcessOutput` might crash. Either c0000005, or c0000374 (heap corruption). Must messed up some internal states.