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Mathis Rosenhauer
libaec
Commits
bc5254df
Commit
bc5254df
authored
Dec 05, 2012
by
Mathis Rosenhauer
Committed by
Thomas Jahns
Feb 19, 2013
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Plain Diff
Avoid double zero-checking block after zero blocks
parent
90e25ec4
Changes
2
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2 changed files
with
35 additions
and
16 deletions
+35
-16
src/encode.c
src/encode.c
+33
-16
src/encode.h
src/encode.h
+2
-0
No files found.
src/encode.c
View file @
bc5254df
...
...
@@ -425,6 +425,31 @@ static int assess_se_option(uint64_t limit, struct aec_stream *strm)
return
len
;
}
static
void
init_output
(
struct
aec_stream
*
strm
)
{
/**
Direct output to next_out if next_out can hold a Coded Data
Set, use internal buffer otherwise.
*/
struct
internal_state
*
state
=
strm
->
state
;
if
(
strm
->
avail_out
>
state
->
cds_len
)
{
if
(
!
state
->
direct_out
)
{
state
->
direct_out
=
1
;
*
strm
->
next_out
=
*
state
->
cds
;
state
->
cds
=
strm
->
next_out
;
}
}
else
{
if
(
state
->
zero_blocks
==
0
||
state
->
direct_out
)
{
/* copy leftover from last block */
*
state
->
cds_buf
=
*
state
->
cds
;
state
->
cds
=
state
->
cds_buf
;
}
state
->
direct_out
=
0
;
}
}
/*
*
* FSM functions
...
...
@@ -596,10 +621,9 @@ static int m_check_zero_block(struct aec_stream *strm)
if
(
state
->
zero_blocks
)
{
/* The current block isn't zero but we have to emit a
* previous zero block first. The current block will be
* handled later.
*
flagged and
handled later.
*/
state
->
block
-=
strm
->
block_size
;
state
->
blocks_avail
++
;
state
->
block_nonzero
=
1
;
state
->
mode
=
m_encode_zero
;
return
M_CONTINUE
;
}
...
...
@@ -682,19 +706,12 @@ static int m_get_block(struct aec_stream *strm)
struct
internal_state
*
state
=
strm
->
state
;
if
(
strm
->
avail_out
>
state
->
cds_len
)
{
if
(
!
state
->
direct_out
)
{
state
->
direct_out
=
1
;
*
strm
->
next_out
=
*
state
->
cds
;
state
->
cds
=
strm
->
next_out
;
}
}
else
{
if
(
state
->
zero_blocks
==
0
||
state
->
direct_out
)
{
/* copy leftover from last block */
*
state
->
cds_buf
=
*
state
->
cds
;
state
->
cds
=
state
->
cds_buf
;
}
state
->
direct_out
=
0
;
init_output
(
strm
);
if
(
state
->
block_nonzero
)
{
state
->
block_nonzero
=
0
;
state
->
mode
=
m_select_code_option
;
return
M_CONTINUE
;
}
if
(
state
->
blocks_avail
==
0
)
{
...
...
src/encode.h
View file @
bc5254df
...
...
@@ -95,6 +95,8 @@ struct internal_state {
int
zero_ref
;
/* current zero block has a reference sample */
int64_t
zero_ref_sample
;
/* reference sample of zero block */
int
zero_blocks
;
/* number of contiguous zero blocks */
int
block_nonzero
;
/* 1 if this is the first non-zero block
* after one or more zero blocks */
int
k
;
/* splitting position */
int
kmax
;
/* maximum number for k depending on id_len */
int
flush
;
/* flush option copied from argument */
...
...
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