author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 12 Mar 2010 15:43:48 +0200 | |
branch | RCL_3 |
changeset 5 | aaf49be10b8c |
parent 0 | 0e761a78d257 |
child 8 | 4a7fac7dd34a |
permissions | -rw-r--r-- |
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/* GStreamer |
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* Copyright (C) <2007> Mike Smith <msmith@xiph.org> |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Library General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Library General Public License for more details. |
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* |
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* You should have received a copy of the GNU Library General Public |
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* License along with this library; if not, write to the |
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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* Boston, MA 02111-1307, USA. |
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*/ |
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|
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/** |
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* SECTION:gstrtspbase64 |
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* @short_description: Helper functions to handle Base64 |
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* |
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* Last reviewed on 2007-07-24 (0.10.14) |
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*/ |
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|
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#ifdef HAVE_CONFIG_H |
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#include "config.h" |
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#endif |
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|
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#include <string.h> |
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|
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#include "gstrtspbase64.h" |
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|
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static char base64table[64] = { |
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'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', |
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'P', |
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'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', |
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'f', |
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'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', |
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'v', |
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'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/' |
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}; |
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|
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/** |
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* gst_rtsp_base64_encode: |
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* @data: the binary data to encode |
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* @len: the length of @data |
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* |
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* Encode a sequence of binary data into its Base-64 stringified representation. |
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* |
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* Returns: a newly allocated, zero-terminated Base-64 encoded string |
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* representing @data. |
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*/ |
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/* This isn't efficient, but it doesn't need to be */ |
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#ifdef __SYMBIAN32__ |
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EXPORT_C |
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#endif |
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|
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gchar * |
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gst_rtsp_base64_encode (const gchar * data, gsize len) |
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{ |
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gchar *out = g_malloc (len * 4 / 3 + 4); |
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gchar *result = out; |
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int chunk; |
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|
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while (len > 0) { |
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chunk = (len > 3) ? 3 : len; |
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*out++ = base64table[(*data & 0xFC) >> 2]; |
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*out++ = base64table[((*data & 0x03) << 4) | ((*(data + 1) & 0xF0) >> 4)]; |
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switch (chunk) { |
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case 3: |
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*out++ = |
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base64table[((*(data + 1) & 0x0F) << 2) | ((*(data + |
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2) & 0xC0) >> 6)]; |
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*out++ = base64table[(*(data + 2)) & 0x3F]; |
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break; |
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case 2: |
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*out++ = base64table[((*(data + 1) & 0x0F) << 2)]; |
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*out++ = '='; |
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break; |
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82 |
case 1: |
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*out++ = '='; |
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*out++ = '='; |
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break; |
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} |
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data += chunk; |
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len -= chunk; |
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} |
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*out = 0; |
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|
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return result; |
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} |
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94 |
|
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/** |
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* gst_rtsp_base64_decode_ip: |
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* @data: the base64 encoded data |
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* @len: location for output length or NULL |
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99 |
* |
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* Decode the base64 string pointed to by @data in-place. When @len is not #NULL |
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* it will contain the length of the decoded data. |
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*/ |
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103 |
void |
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104 |
gst_rtsp_base64_decode_ip (gchar * data, gsize * len) |
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105 |
{ |
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106 |
char dtable[256]; |
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107 |
int i, j, k = 0, n = strlen (data); |
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108 |
|
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109 |
for (i = 0; i < 255; i++) |
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110 |
dtable[i] = 0x80; |
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111 |
for (i = 'A'; i <= 'Z'; i++) |
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112 |
dtable[i] = 0 + (i - 'A'); |
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113 |
for (i = 'a'; i <= 'z'; i++) |
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114 |
dtable[i] = 26 + (i - 'a'); |
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115 |
for (i = '0'; i <= '9'; i++) |
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116 |
dtable[i] = 52 + (i - '0'); |
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117 |
dtable['+'] = 62; |
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118 |
dtable['/'] = 63; |
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dtable['='] = 0; |
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120 |
|
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121 |
for (j = 0; j < n; j += 4) { |
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122 |
char a[4], b[4]; |
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123 |
|
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for (i = 0; i < 4; i++) { |
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125 |
int c = data[i + j]; |
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126 |
|
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127 |
if (dtable[c] & 0x80) { |
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128 |
if (len) |
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*len = 0; |
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130 |
return; |
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131 |
} |
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132 |
a[i] = (char) c; |
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133 |
b[i] = (char) dtable[c]; |
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134 |
} |
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135 |
data[k++] = (b[0] << 2) | (b[1] >> 4); |
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136 |
data[k++] = (b[1] << 4) | (b[2] >> 2); |
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data[k++] = (b[2] << 6) | b[3]; |
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138 |
i = a[2] == '=' ? 1 : (a[3] == '=' ? 2 : 3); |
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139 |
if (i < 3) { |
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data[k] = 0; |
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141 |
if (len) |
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142 |
*len = k; |
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143 |
return; |
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144 |
} |
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145 |
} |
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146 |
data[k] = 0; |
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147 |
if (len) |
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148 |
*len = k; |
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149 |
return; |
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150 |
} |