2
** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
3
** Copyright (C) 2003-2004 M. Bakker, Ahead Software AG, http://www.nero.com
5
** This program is free software; you can redistribute it and/or modify
6
** it under the terms of the GNU General Public License as published by
7
** the Free Software Foundation; either version 2 of the License, or
8
** (at your option) any later version.
10
** This program is distributed in the hope that it will be useful,
11
** but WITHOUT ANY WARRANTY; without even the implied warranty of
12
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13
** GNU General Public License for more details.
15
** You should have received a copy of the GNU General Public License
16
** along with this program; if not, write to the Free Software
17
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19
** Any non-GPL usage of this software or parts of this software is strictly
22
** Commercial non-GPL licensing of this software is possible.
23
** For more info contact Ahead Software through Mpeg4AAClicense@nero.com.
25
** $Id: mp4util.c,v 1.15 2004/01/11 15:52:19 menno Exp $
31
int32_t mp4ff_read_data(mp4ff_t *f, int8_t *data, uint32_t size)
35
result = f->stream->read(f->stream->user_data, data, size);
37
f->current_position += size;
42
int32_t mp4ff_truncate(mp4ff_t * f)
44
return f->stream->truncate(f->stream->user_data);
47
int32_t mp4ff_write_data(mp4ff_t *f, int8_t *data, uint32_t size)
51
result = f->stream->write(f->stream->user_data, data, size);
53
f->current_position += size;
58
int32_t mp4ff_write_int32(mp4ff_t *f,const uint32_t data)
64
*(uint32_t*)temp = data;
70
result = (a<<24) | (b<<16) | (c<<8) | d;
72
return mp4ff_write_data(f,(uint8_t*)&result,sizeof(result));
75
int32_t mp4ff_set_position(mp4ff_t *f, const int64_t position)
77
f->stream->seek(f->stream->user_data, position);
78
f->current_position = position;
83
int64_t mp4ff_position(const mp4ff_t *f)
85
return f->current_position;
88
uint64_t mp4ff_read_int64(mp4ff_t *f)
94
mp4ff_read_data(f, data, 8);
96
for (i = 0; i < 8; i++)
98
result |= ((uint64_t)data[i]) << ((7 - i) * 8);
104
uint32_t mp4ff_read_int32(mp4ff_t *f)
110
mp4ff_read_data(f, data, 4);
111
a = (uint8_t)data[0];
112
b = (uint8_t)data[1];
113
c = (uint8_t)data[2];
114
d = (uint8_t)data[3];
116
result = (a<<24) | (b<<16) | (c<<8) | d;
117
return (uint32_t)result;
120
uint32_t mp4ff_read_int24(mp4ff_t *f)
126
mp4ff_read_data(f, data, 3);
127
a = (uint8_t)data[0];
128
b = (uint8_t)data[1];
129
c = (uint8_t)data[2];
131
result = (a<<16) | (b<<8) | c;
132
return (uint32_t)result;
135
uint16_t mp4ff_read_int16(mp4ff_t *f)
141
mp4ff_read_data(f, data, 2);
142
a = (uint8_t)data[0];
143
b = (uint8_t)data[1];
146
return (uint16_t)result;
149
char * mp4ff_read_string(mp4ff_t * f,uint32_t length)
151
char * str = (char*)malloc(length + 1);
154
if ((uint32_t)mp4ff_read_data(f,str,length)!=length)
167
uint8_t mp4ff_read_char(mp4ff_t *f)
170
mp4ff_read_data(f, &output, 1);
174
uint32_t mp4ff_read_mp4_descr_length(mp4ff_t *f)
177
uint8_t numBytes = 0;
182
b = mp4ff_read_char(f);
184
length = (length << 7) | (b & 0x7F);
185
} while ((b & 0x80) && numBytes < 4);