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
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
// CodecExports.cpp
#include "StdAfx.h"
#include "../../Common/ComTry.h"
#include "../../Windows/PropVariant.h"
#include "../Common/RegisterCodec.h"
#include "../ICoder.h"
extern unsigned int g_NumCodecs;
extern const CCodecInfo *g_Codecs[];
static const UInt16 kDecodeId = 0x2790;
DEFINE_GUID(CLSID_CCodec,
0x23170F69, 0x40C1, kDecodeId, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
static inline HRESULT SetPropString(const char *s, unsigned int size, PROPVARIANT *value)
{
if ((value->bstrVal = ::SysAllocStringByteLen(s, size)) != 0)
value->vt = VT_BSTR;
return S_OK;
}
static inline HRESULT SetPropGUID(const GUID &guid, PROPVARIANT *value)
{
return SetPropString((const char *)&guid, sizeof(GUID), value);
}
static HRESULT SetClassID(CMethodId id, bool encode, PROPVARIANT *value)
{
GUID clsId = CLSID_CCodec;
for (int i = 0; i < sizeof(id); i++, id >>= 8)
clsId.Data4[i] = (Byte)(id & 0xFF);
if (encode)
clsId.Data3++;
return SetPropGUID(clsId, value);
}
static HRESULT FindCodecClassId(const GUID *clsID, UInt32 isCoder2, bool isFilter, bool &encode, int &index)
{
index = -1;
if (clsID->Data1 != CLSID_CCodec.Data1 ||
clsID->Data2 != CLSID_CCodec.Data2 ||
(clsID->Data3 & ~1) != kDecodeId)
return S_OK;
encode = (clsID->Data3 != kDecodeId);
UInt64 id = 0;
for (int j = 0; j < 8; j++)
id |= ((UInt64)clsID->Data4[j]) << (8 * j);
for (unsigned i = 0; i < g_NumCodecs; i++)
{
const CCodecInfo &codec = *g_Codecs[i];
if (id != codec.Id || encode && !codec.CreateEncoder || !encode && !codec.CreateDecoder)
continue;
if (!isFilter && codec.IsFilter || isFilter && !codec.IsFilter ||
codec.NumInStreams != 1 && !isCoder2 || codec.NumInStreams == 1 && isCoder2)
return E_NOINTERFACE;
index = i;
return S_OK;
}
return S_OK;
}
STDAPI CreateCoder2(bool encode, UInt32 index, const GUID *iid, void **outObject)
{
COM_TRY_BEGIN
*outObject = 0;
bool isCoder = (*iid == IID_ICompressCoder) != 0;
bool isCoder2 = (*iid == IID_ICompressCoder2) != 0;
bool isFilter = (*iid == IID_ICompressFilter) != 0;
const CCodecInfo &codec = *g_Codecs[index];
if (!isFilter && codec.IsFilter || isFilter && !codec.IsFilter ||
codec.NumInStreams != 1 && !isCoder2 || codec.NumInStreams == 1 && isCoder2)
return E_NOINTERFACE;
if (encode)
{
if (!codec.CreateEncoder)
return CLASS_E_CLASSNOTAVAILABLE;
*outObject = codec.CreateEncoder();
}
else
{
if (!codec.CreateDecoder)
return CLASS_E_CLASSNOTAVAILABLE;
*outObject = codec.CreateDecoder();
}
if (isCoder)
((ICompressCoder *)*outObject)->AddRef();
else if (isCoder2)
((ICompressCoder2 *)*outObject)->AddRef();
else
((ICompressFilter *)*outObject)->AddRef();
return S_OK;
COM_TRY_END
}
STDAPI CreateCoder(const GUID *clsid, const GUID *iid, void **outObject)
{
*outObject = 0;
bool isCoder = (*iid == IID_ICompressCoder) != 0;
bool isCoder2 = (*iid == IID_ICompressCoder2) != 0;
bool isFilter = (*iid == IID_ICompressFilter) != 0;
if (!isCoder && !isCoder2 && !isFilter)
return E_NOINTERFACE;
bool encode;
int codecIndex;
HRESULT res = FindCodecClassId(clsid, isCoder2, isFilter, encode, codecIndex);
if (res != S_OK)
return res;
if (codecIndex < 0)
return CLASS_E_CLASSNOTAVAILABLE;
return CreateCoder2(encode, codecIndex, iid, outObject);
}
STDAPI GetMethodProperty(UInt32 codecIndex, PROPID propID, PROPVARIANT *value)
{
::VariantClear((VARIANTARG *)value);
const CCodecInfo &codec = *g_Codecs[codecIndex];
switch(propID)
{
case NMethodPropID::kID:
{
value->uhVal.QuadPart = (UInt64)codec.Id;
value->vt = VT_UI8;
break;
}
case NMethodPropID::kName:
if ((value->bstrVal = ::SysAllocString(codec.Name)) != 0)
value->vt = VT_BSTR;
break;
case NMethodPropID::kDecoder:
if (codec.CreateDecoder)
return SetClassID(codec.Id, false, value);
break;
case NMethodPropID::kEncoder:
if (codec.CreateEncoder)
return SetClassID(codec.Id, true, value);
break;
case NMethodPropID::kInStreams:
{
if (codec.NumInStreams != 1)
{
value->vt = VT_UI4;
value->ulVal = (ULONG)codec.NumInStreams;
}
break;
}
}
return S_OK;
}
STDAPI GetNumberOfMethods(UINT32 *numCodecs)
{
*numCodecs = g_NumCodecs;
return S_OK;
}
|