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Linshizhi
ffmpeg.wasm-core
Commits
8ae50d87
Commit
8ae50d87
authored
Dec 24, 2012
by
Justin Ruggles
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ws-snd1: decode directly to the user-provided AVFrame
parent
5a728882
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1 changed file
with
7 additions
and
19 deletions
+7
-19
ws-snd1.c
libavcodec/ws-snd1.c
+7
-19
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libavcodec/ws-snd1.c
View file @
8ae50d87
...
@@ -41,28 +41,19 @@ static const int8_t ws_adpcm_4bit[] = {
...
@@ -41,28 +41,19 @@ static const int8_t ws_adpcm_4bit[] = {
0
,
1
,
2
,
3
,
4
,
5
,
6
,
8
0
,
1
,
2
,
3
,
4
,
5
,
6
,
8
};
};
typedef
struct
WSSndContext
{
AVFrame
frame
;
}
WSSndContext
;
static
av_cold
int
ws_snd_decode_init
(
AVCodecContext
*
avctx
)
static
av_cold
int
ws_snd_decode_init
(
AVCodecContext
*
avctx
)
{
{
WSSndContext
*
s
=
avctx
->
priv_data
;
avctx
->
channels
=
1
;
avctx
->
channels
=
1
;
avctx
->
channel_layout
=
AV_CH_LAYOUT_MONO
;
avctx
->
channel_layout
=
AV_CH_LAYOUT_MONO
;
avctx
->
sample_fmt
=
AV_SAMPLE_FMT_U8
;
avctx
->
sample_fmt
=
AV_SAMPLE_FMT_U8
;
avcodec_get_frame_defaults
(
&
s
->
frame
);
avctx
->
coded_frame
=
&
s
->
frame
;
return
0
;
return
0
;
}
}
static
int
ws_snd_decode_frame
(
AVCodecContext
*
avctx
,
void
*
data
,
static
int
ws_snd_decode_frame
(
AVCodecContext
*
avctx
,
void
*
data
,
int
*
got_frame_ptr
,
AVPacket
*
avpkt
)
int
*
got_frame_ptr
,
AVPacket
*
avpkt
)
{
{
WSSndContext
*
s
=
avctx
->
priv_
data
;
AVFrame
*
frame
=
data
;
const
uint8_t
*
buf
=
avpkt
->
data
;
const
uint8_t
*
buf
=
avpkt
->
data
;
int
buf_size
=
avpkt
->
size
;
int
buf_size
=
avpkt
->
size
;
...
@@ -89,18 +80,17 @@ static int ws_snd_decode_frame(AVCodecContext *avctx, void *data,
...
@@ -89,18 +80,17 @@ static int ws_snd_decode_frame(AVCodecContext *avctx, void *data,
}
}
/* get output buffer */
/* get output buffer */
s
->
frame
.
nb_samples
=
out_size
;
frame
->
nb_samples
=
out_size
;
if
((
ret
=
ff_get_buffer
(
avctx
,
&
s
->
frame
))
<
0
)
{
if
((
ret
=
ff_get_buffer
(
avctx
,
frame
))
<
0
)
{
av_log
(
avctx
,
AV_LOG_ERROR
,
"get_buffer() failed
\n
"
);
av_log
(
avctx
,
AV_LOG_ERROR
,
"get_buffer() failed
\n
"
);
return
ret
;
return
ret
;
}
}
samples
=
s
->
frame
.
data
[
0
];
samples
=
frame
->
data
[
0
];
samples_end
=
samples
+
out_size
;
samples_end
=
samples
+
out_size
;
if
(
in_size
==
out_size
)
{
if
(
in_size
==
out_size
)
{
memcpy
(
samples
,
buf
,
out_size
);
memcpy
(
samples
,
buf
,
out_size
);
*
got_frame_ptr
=
1
;
*
got_frame_ptr
=
1
;
*
(
AVFrame
*
)
data
=
s
->
frame
;
return
buf_size
;
return
buf_size
;
}
}
...
@@ -176,9 +166,8 @@ static int ws_snd_decode_frame(AVCodecContext *avctx, void *data,
...
@@ -176,9 +166,8 @@ static int ws_snd_decode_frame(AVCodecContext *avctx, void *data,
}
}
}
}
s
->
frame
.
nb_samples
=
samples
-
s
->
frame
.
data
[
0
];
frame
->
nb_samples
=
samples
-
frame
->
data
[
0
];
*
got_frame_ptr
=
1
;
*
got_frame_ptr
=
1
;
*
(
AVFrame
*
)
data
=
s
->
frame
;
return
buf_size
;
return
buf_size
;
}
}
...
@@ -187,7 +176,6 @@ AVCodec ff_ws_snd1_decoder = {
...
@@ -187,7 +176,6 @@ AVCodec ff_ws_snd1_decoder = {
.
name
=
"ws_snd1"
,
.
name
=
"ws_snd1"
,
.
type
=
AVMEDIA_TYPE_AUDIO
,
.
type
=
AVMEDIA_TYPE_AUDIO
,
.
id
=
AV_CODEC_ID_WESTWOOD_SND1
,
.
id
=
AV_CODEC_ID_WESTWOOD_SND1
,
.
priv_data_size
=
sizeof
(
WSSndContext
),
.
init
=
ws_snd_decode_init
,
.
init
=
ws_snd_decode_init
,
.
decode
=
ws_snd_decode_frame
,
.
decode
=
ws_snd_decode_frame
,
.
capabilities
=
CODEC_CAP_DR1
,
.
capabilities
=
CODEC_CAP_DR1
,
...
...
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