blob: 6df1690bf89fa75414a9847295c82c4cba9a6d6e (
plain)
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
|
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "media/webm/webm_info_parser.h"
#include "base/logging.h"
#include "media/webm/webm_constants.h"
namespace media {
// Default timecode scale if the TimecodeScale element is
// not specified in the INFO element.
static const int kWebMDefaultTimecodeScale = 1000000;
WebMInfoParser::WebMInfoParser()
: timecode_scale_(-1),
duration_(-1) {
}
WebMInfoParser::~WebMInfoParser() {}
int WebMInfoParser::Parse(const uint8* buf, int size) {
timecode_scale_ = -1;
duration_ = -1;
WebMListParser parser(kWebMIdInfo, this);
int result = parser.Parse(buf, size);
if (result <= 0)
return result;
// For now we do all or nothing parsing.
return parser.IsParsingComplete() ? result : 0;
}
WebMParserClient* WebMInfoParser::OnListStart(int id) { return this; }
bool WebMInfoParser::OnListEnd(int id) {
if (id == kWebMIdInfo && timecode_scale_ == -1) {
// Set timecode scale to default value if it isn't present in
// the Info element.
timecode_scale_ = kWebMDefaultTimecodeScale;
}
return true;
}
bool WebMInfoParser::OnUInt(int id, int64 val) {
if (id != kWebMIdTimecodeScale)
return true;
if (timecode_scale_ != -1) {
DVLOG(1) << "Multiple values for id " << std::hex << id << " specified";
return false;
}
timecode_scale_ = val;
return true;
}
bool WebMInfoParser::OnFloat(int id, double val) {
if (id != kWebMIdDuration) {
DVLOG(1) << "Unexpected float for id" << std::hex << id;
return false;
}
if (duration_ != -1) {
DVLOG(1) << "Multiple values for duration.";
return false;
}
duration_ = val;
return true;
}
bool WebMInfoParser::OnBinary(int id, const uint8* data, int size) {
return true;
}
bool WebMInfoParser::OnString(int id, const std::string& str) {
return true;
}
} // namespace media
|
