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Stefan Westerfeld
audiowmark
Commits
34d47bde
Commit
34d47bde
authored
Apr 27, 2020
by
Stefan Westerfeld
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Erase ts reader header after parsing (optimize performance).
Signed-off-by:
Stefan Westerfeld
<
stefan@space.twc.de
>
parent
20b6418d
Changes
1
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-7
testmpegts.cc
src/testmpegts.cc
+7
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src/testmpegts.cc
View file @
34d47bde
...
...
@@ -186,17 +186,16 @@ private:
{
string
filename
;
size_t
data_size
=
0
;
size_t
header_size
=
0
;
};
vector
<
Entry
>
m_entries
;
bool
parse_header
(
Header
&
header
,
const
vector
<
unsigned
char
>&
data
);
bool
parse_header
(
Header
&
header
,
vector
<
unsigned
char
>&
data
);
public
:
Error
load
(
const
string
&
inname
);
const
vector
<
Entry
>&
entries
();
};
bool
TSReader
::
parse_header
(
Header
&
header
,
const
vector
<
unsigned
char
>&
data
)
TSReader
::
parse_header
(
Header
&
header
,
vector
<
unsigned
char
>&
data
)
{
for
(
size_t
i
=
0
;
i
<
data
.
size
();
i
++
)
{
...
...
@@ -208,9 +207,11 @@ TSReader::parse_header (Header& header, const vector<unsigned char>& data)
std
::
smatch
sm
;
if
(
regex_match
(
s
,
sm
,
header_re
))
{
header
.
header_size
=
i
+
1
;
// number of header bytes including 0 termination
header
.
data_size
=
atoi
(
sm
[
1
].
str
().
c_str
());
header
.
filename
=
sm
[
2
];
// erase header including null termination
data
.
erase
(
data
.
begin
(),
data
.
begin
()
+
i
+
1
);
return
true
;
}
}
...
...
@@ -247,14 +248,13 @@ TSReader::load (const string& inname)
{
if
(
parse_header
(
header
,
awmk_stream
))
{
awmk_stream
.
reserve
(
header
.
header_size
+
header
.
data_size
+
p
.
size
());
awmk_stream
.
reserve
(
header
.
data_size
+
p
.
size
());
header_valid
=
true
;
}
}
// done? do we have enough bytes for the complete entry?
if
(
header_valid
&&
awmk_stream
.
size
()
>=
(
header
.
header_size
+
header
.
data_size
)
)
if
(
header_valid
&&
awmk_stream
.
size
()
>=
header
.
data_size
)
{
awmk_stream
.
erase
(
awmk_stream
.
begin
(),
awmk_stream
.
begin
()
+
header
.
header_size
);
awmk_stream
.
resize
(
header
.
data_size
);
m_entries
.
push_back
({
header
.
filename
,
std
::
move
(
awmk_stream
)});
...
...
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