diff options
Diffstat (limited to 'faad2/src/common/mp4ff/mp4util.c')
| -rw-r--r-- | faad2/src/common/mp4ff/mp4util.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/faad2/src/common/mp4ff/mp4util.c b/faad2/src/common/mp4ff/mp4util.c new file mode 100644 index 0000000..8acfcfe --- /dev/null +++ b/faad2/src/common/mp4ff/mp4util.c @@ -0,0 +1,191 @@ +/*
+** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
+** Copyright (C) 2003-2005 M. Bakker, Nero AG, http://www.nero.com
+**
+** This program is free software; you can redistribute it and/or modify
+** it under the terms of the GNU General Public License as published by
+** the Free Software Foundation; either version 2 of the License, or
+** (at your option) any later version.
+**
+** This program is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+** GNU General Public License for more details.
+**
+** You should have received a copy of the GNU General Public License
+** along with this program; if not, write to the Free Software
+** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+**
+** Any non-GPL usage of this software or parts of this software is strictly
+** forbidden.
+**
+** The "appropriate copyright message" mentioned in section 2c of the GPLv2
+** must read: "Code from FAAD2 is copyright (c) Nero AG, www.nero.com"
+**
+** Commercial non-GPL licensing of this software is possible.
+** For more info contact Nero AG through Mpeg4AAClicense@nero.com.
+**
+** $Id: mp4util.c,v 1.20 2007/11/01 12:33:29 menno Exp $
+**/
+
+#include "mp4ffint.h"
+#include <stdlib.h>
+
+int32_t mp4ff_read_data(mp4ff_t *f, int8_t *data, uint32_t size)
+{
+ int32_t result = 1;
+
+ result = f->stream->read(f->stream->user_data, data, size);
+
+ f->current_position += size;
+
+ return result;
+}
+
+int32_t mp4ff_truncate(mp4ff_t * f)
+{
+ return f->stream->truncate(f->stream->user_data);
+}
+
+int32_t mp4ff_write_data(mp4ff_t *f, int8_t *data, uint32_t size)
+{
+ int32_t result = 1;
+
+ result = f->stream->write(f->stream->user_data, data, size);
+
+ f->current_position += size;
+
+ return result;
+}
+
+int32_t mp4ff_write_int32(mp4ff_t *f,const uint32_t data)
+{
+ uint32_t result;
+ uint32_t a, b, c, d;
+ int8_t temp[4];
+
+ *(uint32_t*)temp = data;
+ a = (uint8_t)temp[0];
+ b = (uint8_t)temp[1];
+ c = (uint8_t)temp[2];
+ d = (uint8_t)temp[3];
+
+ result = (a<<24) | (b<<16) | (c<<8) | d;
+
+ return mp4ff_write_data(f,(uint8_t*)&result,sizeof(result));
+}
+
+int32_t mp4ff_set_position(mp4ff_t *f, const int64_t position)
+{
+ f->stream->seek(f->stream->user_data, position);
+ f->current_position = position;
+
+ return 0;
+}
+
+int64_t mp4ff_position(const mp4ff_t *f)
+{
+ return f->current_position;
+}
+
+uint64_t mp4ff_read_int64(mp4ff_t *f)
+{
+ uint8_t data[8];
+ uint64_t result = 0;
+ int8_t i;
+
+ mp4ff_read_data(f, data, 8);
+
+ for (i = 0; i < 8; i++)
+ {
+ result |= ((uint64_t)data[i]) << ((7 - i) * 8);
+ }
+
+ return result;
+}
+
+uint32_t mp4ff_read_int32(mp4ff_t *f)
+{
+ uint32_t result;
+ uint32_t a, b, c, d;
+ int8_t data[4];
+
+ mp4ff_read_data(f, data, 4);
+ a = (uint8_t)data[0];
+ b = (uint8_t)data[1];
+ c = (uint8_t)data[2];
+ d = (uint8_t)data[3];
+
+ result = (a<<24) | (b<<16) | (c<<8) | d;
+ return (uint32_t)result;
+}
+
+uint32_t mp4ff_read_int24(mp4ff_t *f)
+{
+ uint32_t result;
+ uint32_t a, b, c;
+ int8_t data[4];
+
+ mp4ff_read_data(f, data, 3);
+ a = (uint8_t)data[0];
+ b = (uint8_t)data[1];
+ c = (uint8_t)data[2];
+
+ result = (a<<16) | (b<<8) | c;
+ return (uint32_t)result;
+}
+
+uint16_t mp4ff_read_int16(mp4ff_t *f)
+{
+ uint32_t result;
+ uint32_t a, b;
+ int8_t data[2];
+
+ mp4ff_read_data(f, data, 2);
+ a = (uint8_t)data[0];
+ b = (uint8_t)data[1];
+
+ result = (a<<8) | b;
+ return (uint16_t)result;
+}
+
+char * mp4ff_read_string(mp4ff_t * f,uint32_t length)
+{
+ char * str = (char*)malloc(length + 1);
+ if (str!=0)
+ {
+ if ((uint32_t)mp4ff_read_data(f,str,length)!=length)
+ {
+ free(str);
+ str = 0;
+ }
+ else
+ {
+ str[length] = 0;
+ }
+ }
+ return str;
+}
+
+uint8_t mp4ff_read_char(mp4ff_t *f)
+{
+ uint8_t output;
+ mp4ff_read_data(f, &output, 1);
+ return output;
+}
+
+uint32_t mp4ff_read_mp4_descr_length(mp4ff_t *f)
+{
+ uint8_t b;
+ uint8_t numBytes = 0;
+ uint32_t length = 0;
+
+ do
+ {
+ b = mp4ff_read_char(f);
+ numBytes++;
+ length = (length << 7) | (b & 0x7F);
+ } while ((b & 0x80) && numBytes < 4);
+
+ return length;
+}
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