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MF_E_ALLOCATOR_NOT_COMMITED
Where the result originates
MF_E_ALLOCATOR_NOT_COMMITED means the allocator knows its configuration but has not committed the backing sample pool.
The result comes from the sample allocator at the transition between configuration and active allocation. A representative case is a presenter initializes the allocator but begins streaming without reserving the configured surfaces.
Read the call sequence as a timeline. First, the application reaches the sample allocator at the transition between configuration and active allocation. Next, the component evaluates the allocator knows its configuration but has not committed the backing sample pool. A wrapper, user interface, or fallback path can report a less specific message afterward.
Evidence that survives retries
- Exact request: method name, all identifiers, units, flags, stream number, requested action, and this result.
- Object state: initialization result, commit call and result, sample count, device state, outstanding old samples, and current commit flag.
- Correlation: callback cookie, object instance, URL or file identity, device identity, and timestamps from the same attempt.
- Underlying cause: the first Win32, COM, network, driver, policy, or component error reported before
0xC00DA7F9.
A controlled verification sequence
Use one controlled experiment: call the documented commit method after initialization and before requesting samples. A useful comparison for this result changes exactly that variable; changing content, account, proxy, device, components, and version together makes attribution impossible.
| Outcome | Interpretation |
|---|---|
| The same operation now succeeds | The changed precondition was relevant to the failure. |
| A more specific earlier HRESULT appears | Preserve it; this result was probably a wrapper or terminal state. |
| The operation advances and fails later | The condition is fixed even though the complete workflow still has another defect. |
| No behavior changes | Restore the original baseline and test another documented prerequisite instead of stacking workarounds. |
Nearby results that mean something else
| Related code | Why it is not interchangeable |
|---|---|
MF_E_ALLOCATOR_NOT_INITIALIZED | Memory allocator is not initialized. |
MF_E_ALLOCATOR_ALREADY_COMMITED | Memory allocator has already been committed. |
MF_E_STREAM_ERROR | An error occurred in media stream. |
The important distinction is this: MF_E_ALLOCATOR_NOT_INITIALIZED is earlier in the lifecycle; already committed is later. Use the symbolic constant and 0xC00DA7F9 value to distinguish states that share a similar visible message.
Repair at the owning layer
Apply the narrow remedy: commit the allocator after final configuration; if commit fails, fix that original failure instead of ignoring it. Then discard stale media objects, pending callbacks, cached provider sessions, or installer state as appropriate and rerun the exact request that originally returned it.
References
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