nihed-cros-libva/src/status.rs

   1 // Copyright 2022 The ChromiumOS Authors
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 use std::ffi::CStr;
   6
   7 use anyhow::anyhow;
   8 use anyhow::Result;
   9
  10 use crate::bindings;
  11
  12 /// Wrapper over `VAStatus`, calling check() returns a Error if the status is not VA_STATUS_SUCCESS.
  13 #[must_use = "VAStatus might not be VA_STATUS_SUCCESS."]
  14 pub(crate) struct Status(pub bindings::VAStatus);
  15
  16 impl Status {
  17     /// Returns `Ok(())` if this status is successful, and an error otherwise.
  18     pub(crate) fn check(&self) -> Result<()> {
  19         if self.0 == bindings::constants::VA_STATUS_SUCCESS as i32 {
  20             Ok(())
  21         } else {
  22             // Safe because `vaErrorStr` will return a pointer to a statically allocated, null
  23             // terminated C string. The pointer is guaranteed to never be null.
  24             let err_str = unsafe { CStr::from_ptr(bindings::vaErrorStr(self.0)) }
  25                 .to_str()
  26                 .unwrap();
  27             Err(anyhow!("VA-API error: {}: {}", self.0, err_str))
  28         }
  29     }
  30 }