1 /* ------------------------------------------------------------------
2 * Copyright (C) 1998-2009 PacketVideo
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
13 * express or implied.
14 * See the License for the specific language governing permissions
15 * and limitations under the License.
16 * -------------------------------------------------------------------
17 */
18 #ifndef PV_AVIFILE_STATUS
19 #include "pv_avifile_status.h"
20 #endif
21
22 #ifndef PV_AVIFILE_PARSER_UTILS_H_INCLUDED
23 #include "pv_avifile_parser_utils.h"
24 #endif
25
26
27
28 PV_AVI_FILE_PARSER_ERROR_TYPE
ReadNextChunkType(PVFile * aFp,uint32 & aChkType)29 PVAviFileParserUtils::ReadNextChunkType(PVFile* aFp, uint32& aChkType)
30 {
31 uint32 data = 0;
32
33 if (PV_AVI_FILE_PARSER_SUCCESS != read32(aFp, data))
34 {
35 return PV_AVI_FILE_PARSER_READ_ERROR;
36 }
37
38 aChkType = data;
39 PV_AVI_FILE_PARSER_ERROR_TYPE error = PV_AVI_FILE_PARSER_ERROR_UNKNOWN;
40
41 if (aChkType == RIFF
42 || aChkType == AVI
43 || aChkType == LIST
44 || aChkType == HDRL
45 || aChkType == STRL
46 || aChkType == STRH
47 || aChkType == STRF
48 || aChkType == STRN
49 || aChkType == STRD
50 || aChkType == IDX1
51 || aChkType == VIDS
52 || aChkType == AUDS
53 || aChkType == MIDS
54 || aChkType == TXTS
55 || aChkType == DIB
56 || aChkType == AVIH
57 || aChkType == MOVI
58 || aChkType == JUNK)
59 {
60 error = PV_AVI_FILE_PARSER_SUCCESS ;
61 }
62 else
63 {
64 error = PV_AVI_FILE_PARSER_UNSUPPORTED_CHUNK;
65 }
66
67 return error;
68 }
69
70 PV_AVI_FILE_PARSER_ERROR_TYPE
read32(PVFile * aFp,uint32 & aBuff,bool aBigEndian)71 PVAviFileParserUtils::read32(PVFile* aFp, uint32& aBuff, bool aBigEndian)
72 {
73 aBuff = 0;
74 const uint32 sz = 4;
75 uint8 temp[sz] = {0};
76
77 if (aFp->Read(temp, 1, sz) != sz)
78 {
79 return PV_AVI_FILE_PARSER_ERROR_UNKNOWN;
80 }
81
82 if (aBigEndian)
83 {
84 big_endian_to_host((char*)temp, sz);
85 }
86
87 for (uint32 ii = 0; ii < sz; ii++)
88 {
89 aBuff = (aBuff << 8 | temp[ii]);
90 }
91
92 return PV_AVI_FILE_PARSER_SUCCESS;
93 }
94
read8(PVFile * aFp,uint8 * aBuff,uint32 aLength)95 uint32 PVAviFileParserUtils::read8(PVFile* aFp, uint8* aBuff, uint32 aLength)
96 {
97 for (uint32 ii = 0; ii < aLength; ii++)
98 {
99 uint8 temp = 0;
100 if (aFp->Read(&temp, 1, 1) != 1)
101 {
102 return 0;
103 }
104 else
105 {
106 aBuff[ii] = temp;
107 }
108 }
109 return aLength;
110 }
111
112 PV_AVI_FILE_PARSER_ERROR_TYPE
read16(PVFile * aFp,uint16 & aBuff,bool aBigEndian)113 PVAviFileParserUtils::read16(PVFile* aFp, uint16& aBuff, bool aBigEndian)
114 {
115 aBuff = 0;
116 const uint32 sz = 2;
117 uint8 temp[sz] = {0};
118
119 if (aFp->Read(temp, 1, sz) != sz)
120 {
121 return PV_AVI_FILE_PARSER_ERROR_UNKNOWN;
122 }
123
124 if (aBigEndian)
125 {
126 big_endian_to_host((char*)temp, sz);
127 }
128
129 for (uint32 ii = 0; ii < sz; ii++)
130 {
131 aBuff = (aBuff << 8 | temp[ii]);
132 }
133 return PV_AVI_FILE_PARSER_SUCCESS;
134 }
135
GetStreamNumber(uint32 aData)136 int32 PVAviFileParserUtils::GetStreamNumber(uint32 aData)
137 {
138 uint8 temp[3] = {0};
139 temp[0] = aData >> 24;
140 temp[1] = ((aData >> 16) & 0xff);
141 temp[2] = '\0';
142
143 uint32 strNum = 0;
144 if (!PV_atoi((const char*)temp, 'd', 2, strNum))
145 {
146 return -1;
147 }
148 else
149 {
150 return strNum;
151 }
152 }
153
154
155