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Linshizhi
ffmpeg.wasm-core
Commits
e43b0a73
Commit
e43b0a73
authored
Aug 24, 2008
by
Kostya Shishkov
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okayed chunks of AAC encoder
Originally committed as revision 14939 to
svn://svn.ffmpeg.org/ffmpeg/trunk
parent
6986662b
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Showing
1 changed file
with
22 additions
and
8 deletions
+22
-8
aacenc.c
libavcodec/aacenc.c
+22
-8
No files found.
libavcodec/aacenc.c
View file @
e43b0a73
...
...
@@ -28,6 +28,7 @@
* TODOs:
* psy model selection with some option
* add sane pulse detection
* add temporal noise shaping
***********************************/
#include "avcodec.h"
...
...
@@ -211,10 +212,6 @@ static av_cold int aac_encode_init(AVCodecContext *avctx)
return
-
1
;
}
s
->
samplerate_index
=
i
;
s
->
swb_sizes1024
=
swb_size_1024
[
i
];
s
->
swb_num1024
=
ff_aac_num_swb_1024
[
i
];
s
->
swb_sizes128
=
swb_size_128
[
i
];
s
->
swb_num128
=
ff_aac_num_swb_128
[
i
];
dsputil_init
(
&
s
->
dsp
,
avctx
);
ff_mdct_init
(
&
s
->
mdct1024
,
11
,
0
);
...
...
@@ -229,7 +226,7 @@ static av_cold int aac_encode_init(AVCodecContext *avctx)
s
->
cpe
=
av_mallocz
(
sizeof
(
ChannelElement
)
*
aac_chan_configs
[
avctx
->
channels
-
1
][
0
]);
if
(
ff_aac_psy_init
(
&
s
->
psy
,
avctx
,
AAC_PSY_3GPP
,
aac_chan_configs
[
avctx
->
channels
-
1
][
0
],
0
,
s
->
swb_sizes1024
,
s
->
swb_num1024
,
s
->
swb_sizes128
,
s
->
swb_num128
)
<
0
){
s
wb_size_1024
[
i
],
ff_aac_num_swb_1024
[
i
],
swb_size_128
[
i
],
ff_aac_num_swb_128
[
i
]
)
<
0
){
av_log
(
avctx
,
AV_LOG_ERROR
,
"Cannot initialize selected model.
\n
"
);
return
-
1
;
}
...
...
@@ -243,9 +240,8 @@ static av_cold int aac_encode_init(AVCodecContext *avctx)
* Encode ics_info element.
* @see Table 4.6 (syntax of ics_info)
*/
static
void
put_ics_info
(
A
VCodecContext
*
avctx
,
IndividualChannelStream
*
info
)
static
void
put_ics_info
(
A
ACEncContext
*
s
,
IndividualChannelStream
*
info
)
{
AACEncContext
*
s
=
avctx
->
priv_data
;
int
i
;
put_bits
(
&
s
->
pb
,
1
,
0
);
// ics_reserved bit
...
...
@@ -261,6 +257,24 @@ static void put_ics_info(AVCodecContext *avctx, IndividualChannelStream *info)
}
}
/**
* Calculate the number of bits needed to code all coefficient signs in current band.
*/
static
int
calculate_band_sign_bits
(
AACEncContext
*
s
,
SingleChannelElement
*
sce
,
int
group_len
,
int
start
,
int
size
)
{
int
bits
=
0
;
int
i
,
w
;
for
(
w
=
0
;
w
<
group_len
;
w
++
){
for
(
i
=
0
;
i
<
size
;
i
++
){
if
(
sce
->
icoefs
[
start
+
i
])
bits
++
;
}
start
+=
128
;
}
return
bits
;
}
/**
* Encode pulse data.
*/
...
...
@@ -295,7 +309,7 @@ static void encode_spectral_coeffs(AACEncContext *s, SingleChannelElement *sce)
continue
;
}
for
(
w2
=
w
;
w2
<
w
+
sce
->
ics
.
group_len
[
wg
];
w2
++
){
encode_band_coeffs
(
s
,
cpe
,
channel
,
start
+
w2
*
128
,
encode_band_coeffs
(
s
,
sce
,
start
+
w2
*
128
,
sce
->
ics
.
swb_sizes
[
i
],
sce
->
band_type
[
w
*
16
+
i
]);
}
...
...
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