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Linshizhi
ffmpeg.wasm-core
Commits
7d8075cf
Commit
7d8075cf
authored
Apr 13, 2016
by
Alexandra Hájková
Committed by
Diego Biurrun
Nov 24, 2016
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ra144: Convert to the new bitstream reader
parent
79566ec8
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1 changed file
with
12 additions
and
11 deletions
+12
-11
ra144dec.c
libavcodec/ra144dec.c
+12
-11
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libavcodec/ra144dec.c
View file @
7d8075cf
...
...
@@ -23,8 +23,9 @@
*/
#include "libavutil/channel_layout.h"
#include "avcodec.h"
#include "
get_bits
.h"
#include "
bitstream
.h"
#include "internal.h"
#include "ra144.h"
...
...
@@ -46,12 +47,12 @@ static av_cold int ra144_decode_init(AVCodecContext * avctx)
}
static
void
do_output_subblock
(
RA144Context
*
ractx
,
const
uint16_t
*
lpc_coefs
,
int
gval
,
GetBitContext
*
gb
)
int
gval
,
BitstreamContext
*
bc
)
{
int
cba_idx
=
get_bits
(
gb
,
7
);
// index of the adaptive CB, 0 if none
int
gain
=
get_bits
(
gb
,
8
);
int
cb1_idx
=
get_bits
(
gb
,
7
);
int
cb2_idx
=
get_bits
(
gb
,
7
);
int
cba_idx
=
bitstream_read
(
bc
,
7
);
// index of the adaptive CB, 0 if none
int
gain
=
bitstream_read
(
bc
,
8
);
int
cb1_idx
=
bitstream_read
(
bc
,
7
);
int
cb2_idx
=
bitstream_read
(
bc
,
7
);
ff_subblock_synthesis
(
ractx
,
lpc_coefs
,
cba_idx
,
cb1_idx
,
cb2_idx
,
gval
,
gain
);
...
...
@@ -74,7 +75,7 @@ static int ra144_decode_frame(AVCodecContext * avctx, void *data,
unsigned
int
energy
;
RA144Context
*
ractx
=
avctx
->
priv_data
;
GetBitContext
gb
;
BitstreamContext
bc
;
if
(
buf_size
<
FRAMESIZE
)
{
av_log
(
avctx
,
AV_LOG_ERROR
,
...
...
@@ -91,15 +92,15 @@ static int ra144_decode_frame(AVCodecContext * avctx, void *data,
}
samples
=
(
int16_t
*
)
frame
->
data
[
0
];
init_get_bits
(
&
gb
,
buf
,
FRAMESIZE
*
8
);
bitstream_init
(
&
bc
,
buf
,
FRAMESIZE
*
8
);
for
(
i
=
0
;
i
<
LPC_ORDER
;
i
++
)
lpc_refl
[
i
]
=
ff_lpc_refl_cb
[
i
][
get_bits
(
&
gb
,
sizes
[
i
])];
lpc_refl
[
i
]
=
ff_lpc_refl_cb
[
i
][
bitstream_read
(
&
bc
,
sizes
[
i
])];
ff_eval_coefs
(
ractx
->
lpc_coef
[
0
],
lpc_refl
);
ractx
->
lpc_refl_rms
[
0
]
=
ff_rms
(
lpc_refl
);
energy
=
ff_energy_tab
[
get_bits
(
&
gb
,
5
)];
energy
=
ff_energy_tab
[
bitstream_read
(
&
bc
,
5
)];
refl_rms
[
0
]
=
ff_interp
(
ractx
,
block_coefs
[
0
],
1
,
1
,
ractx
->
old_energy
);
refl_rms
[
1
]
=
ff_interp
(
ractx
,
block_coefs
[
1
],
2
,
...
...
@@ -111,7 +112,7 @@ static int ra144_decode_frame(AVCodecContext * avctx, void *data,
ff_int_to_int16
(
block_coefs
[
3
],
ractx
->
lpc_coef
[
0
]);
for
(
i
=
0
;
i
<
NBLOCKS
;
i
++
)
{
do_output_subblock
(
ractx
,
block_coefs
[
i
],
refl_rms
[
i
],
&
gb
);
do_output_subblock
(
ractx
,
block_coefs
[
i
],
refl_rms
[
i
],
&
bc
);
for
(
j
=
0
;
j
<
BLOCKSIZE
;
j
++
)
*
samples
++
=
av_clip_int16
(
ractx
->
curr_sblock
[
j
+
10
]
<<
2
);
...
...
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