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
|
/*****************************************************************
* gmerlin-avdecoder - a general purpose multimedia decoding library
*
* Copyright (c) 2001 - 2012 Members of the Gmerlin project
* gmerlin-general@lists.sourceforge.net
* http://gmerlin.sourceforge.net
*
* 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, see <http://www.gnu.org/licenses/>.
* *****************************************************************/
#include <string.h>
#include <stdlib.h>
#include <avdec_private.h>
#include <qt.h>
#include <stdio.h>
#define LOG_DOMAIN "qt_esds"
#define MP4ODescrTag 0x01
#define MP4IODescrTag 0x02
#define MP4ESDescrTag 0x03
#define MP4DecConfigDescrTag 0x04
#define MP4DecSpecificDescrTag 0x05
#define MP4SLConfigDescrTag 0x06
#define MP4ContentIdDescrTag 0x07
#define MP4SupplContentIdDescrTag 0x08
#define MP4IPIPtrDescrTag 0x09
#define MP4IPMPPtrDescrTag 0x0A
#define MP4IPMPDescrTag 0x0B
#define MP4RegistrationDescrTag 0x0D
#define MP4ESIDIncDescrTag 0x0E
#define MP4ESIDRefDescrTag 0x0F
#define MP4FileIODescrTag 0x10
#define MP4FileODescrTag 0x11
#define MP4ExtProfileLevelDescrTag 0x13
#define MP4ExtDescrTagsStart 0x80
#define MP4ExtDescrTagsEnd 0xFE
void bgav_qt_esds_dump(int indent, qt_esds_t * e)
{
bgav_diprintf(indent, "esds:\n");
bgav_qt_atom_dump_header(indent+2, &e->h);
bgav_diprintf(indent+2, "Version: %d\n", e->version);
bgav_diprintf(indent+2, "Flags: 0x%0x06x\n", e->flags);
bgav_diprintf(indent+2, "objectTypeId: %d\n", e->objectTypeId);
bgav_diprintf(indent+2, "streamType: 0x%02x\n", e->streamType);
bgav_diprintf(indent+2, "bufferSizeDB: %d\n", e->bufferSizeDB);
bgav_diprintf(indent+2, "maxBitrate: %d\n", e->maxBitrate);
bgav_diprintf(indent+2, "avgBitrate: %d\n", e->avgBitrate);
bgav_diprintf(indent+2, "decoderConfigLen: %d\n", e->decoderConfigLen);
bgav_diprintf(indent+2, "decoderConfig:\n");
gavl_hexdump(e->decoderConfig, e->decoderConfigLen, 16);
}
static int read_mp4_descr_length(bgav_input_context_t * input)
{
uint8_t b;
int num_bytes = 0;
unsigned int length = 0;
do
{
if(!bgav_input_read_8(input, &b))
return -1;
num_bytes++;
length = (length << 7) | (b & 0x7F);
} while ((b & 0x80) && (num_bytes < 4));
return length;
}
int bgav_qt_esds_read(qt_atom_header_t * h, bgav_input_context_t * input,
qt_esds_t * ret)
{
uint8_t tag;
int len;
READ_VERSION_AND_FLAGS;
memcpy(&ret->h, h, sizeof(*h));
if(!bgav_input_read_8(input, &tag))
return 0;
len = read_mp4_descr_length(input);
if(tag == MP4ESDescrTag)
{
if(len < 20)
return 0;
bgav_input_skip(input, 3);
}
else
bgav_input_skip(input, 2);
if(!bgav_input_read_8(input, &tag))
return 0;
if(tag != MP4DecConfigDescrTag)
return 0;
len = read_mp4_descr_length(input);
if(len < 13)
{
gavl_log(GAVL_LOG_WARNING, LOG_DOMAIN,
"length of MP4DecConfigDescrTag too short: %d < 13", len);
return 0;
}
if(!bgav_input_read_8(input, &ret->objectTypeId) ||
!bgav_input_read_8(input, &ret->streamType) ||
!bgav_input_read_24_be(input, &ret->bufferSizeDB) ||
!bgav_input_read_32_be(input, &ret->maxBitrate) ||
!bgav_input_read_32_be(input, &ret->avgBitrate))
return 0;
if(len >= 15)
{
if(!bgav_input_read_8(input, &tag))
return 0;
if(tag != MP4DecSpecificDescrTag)
return 0;
ret->decoderConfigLen = read_mp4_descr_length(input);
ret->decoderConfig = calloc(ret->decoderConfigLen+16, 1);
if(bgav_input_read_data(input, ret->decoderConfig,
ret->decoderConfigLen) < ret->decoderConfigLen)
return 0;
}
bgav_qt_atom_skip(input, h);
return 1;
}
void bgav_qt_esds_free(qt_esds_t * esds)
{
if(esds->decoderConfig)
free(esds->decoderConfig);
}
|
