1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
/*############################################################################
# Copyright (C) 2005 Intel Corporation
#
# SPDX-License-Identifier: MIT
############################################################################*/
#pragma once
#include "sample_utils.h"
#include "vpl/mfxstructures.h"
/*
Rationale: locks allocator if necessary to get RAW pointers, unlock it at the end
*/
class SurfaceAutoLock {
private:
SurfaceAutoLock(const SurfaceAutoLock&) {}
public:
SurfaceAutoLock(mfxFrameAllocator& alloc, mfxFrameSurface1& srf)
: m_alloc(alloc),
m_srf(srf),
m_lockRes(MFX_ERR_NONE),
m_bLocked() {
LockFrame();
}
operator mfxStatus() {
return m_lockRes;
}
~SurfaceAutoLock() {
UnlockFrame();
}
protected:
mfxFrameAllocator& m_alloc;
mfxFrameSurface1& m_srf;
mfxStatus m_lockRes;
bool m_bLocked;
void LockFrame() {
//no allocator used, no need to do lock
if (m_srf.Data.Y != 0)
return;
//lock required
m_lockRes = m_alloc.Lock(m_alloc.pthis, m_srf.Data.MemId, &m_srf.Data);
if (m_lockRes == MFX_ERR_NONE) {
m_bLocked = true;
}
}
void UnlockFrame() {
if (m_lockRes != MFX_ERR_NONE || !m_bLocked) {
return;
}
//unlock required
m_alloc.Unlock(m_alloc.pthis, m_srf.Data.MemId, &m_srf.Data);
}
};
|
