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Stefan Westerfeld
ffmpeg
Commits
8893fbdf
Commit
8893fbdf
authored
Dec 31, 2011
by
Justin Ruggles
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bmv audio: implement new audio decoding API
parent
03fafdec
Changes
1
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1 changed file
with
25 additions
and
9 deletions
+25
-9
bmv.c
libavcodec/bmv.c
+25
-9
No files found.
libavcodec/bmv.c
View file @
8893fbdf
...
...
@@ -285,12 +285,17 @@ static av_cold int decode_end(AVCodecContext *avctx)
return
0
;
}
typedef
struct
BMVAudioDecContext
{
AVFrame
frame
;
}
BMVAudioDecContext
;
static
const
int
bmv_aud_mults
[
16
]
=
{
16512
,
8256
,
4128
,
2064
,
1032
,
516
,
258
,
192
,
129
,
88
,
64
,
56
,
48
,
40
,
36
,
32
};
static
av_cold
int
bmv_aud_decode_init
(
AVCodecContext
*
avctx
)
{
BMVAudioDecContext
*
c
=
avctx
->
priv_data
;
if
(
avctx
->
channels
!=
2
)
{
av_log
(
avctx
,
AV_LOG_INFO
,
"invalid number of channels
\n
"
);
...
...
@@ -299,17 +304,21 @@ static av_cold int bmv_aud_decode_init(AVCodecContext *avctx)
avctx
->
sample_fmt
=
AV_SAMPLE_FMT_S16
;
avcodec_get_frame_defaults
(
&
c
->
frame
);
avctx
->
coded_frame
=
&
c
->
frame
;
return
0
;
}
static
int
bmv_aud_decode_frame
(
AVCodecContext
*
avctx
,
void
*
data
,
int
*
data_size
,
AVPacket
*
avpkt
)
static
int
bmv_aud_decode_frame
(
AVCodecContext
*
avctx
,
void
*
data
,
int
*
got_frame_ptr
,
AVPacket
*
avpkt
)
{
BMVAudioDecContext
*
c
=
avctx
->
priv_data
;
const
uint8_t
*
buf
=
avpkt
->
data
;
int
buf_size
=
avpkt
->
size
;
int
blocks
=
0
,
total_blocks
,
i
;
int
out_size
;
int16_t
*
output_samples
=
data
;
int
ret
;
int16_t
*
output_samples
;
int
scale
[
2
];
total_blocks
=
*
buf
++
;
...
...
@@ -318,11 +327,14 @@ static int bmv_aud_decode_frame(AVCodecContext *avctx, void *data, int *data_siz
total_blocks
*
65
+
1
,
buf_size
);
return
AVERROR_INVALIDDATA
;
}
out_size
=
total_blocks
*
64
*
sizeof
(
*
output_samples
);
if
(
*
data_size
<
out_size
)
{
av_log
(
avctx
,
AV_LOG_ERROR
,
"Output buffer is too small
\n
"
);
return
AVERROR
(
EINVAL
);
/* get output buffer */
c
->
frame
.
nb_samples
=
total_blocks
*
32
;
if
((
ret
=
avctx
->
get_buffer
(
avctx
,
&
c
->
frame
))
<
0
)
{
av_log
(
avctx
,
AV_LOG_ERROR
,
"get_buffer() failed
\n
"
);
return
ret
;
}
output_samples
=
(
int16_t
*
)
c
->
frame
.
data
[
0
];
for
(
blocks
=
0
;
blocks
<
total_blocks
;
blocks
++
)
{
uint8_t
code
=
*
buf
++
;
...
...
@@ -335,7 +347,9 @@ static int bmv_aud_decode_frame(AVCodecContext *avctx, void *data, int *data_siz
}
}
*
data_size
=
out_size
;
*
got_frame_ptr
=
1
;
*
(
AVFrame
*
)
data
=
c
->
frame
;
return
buf_size
;
}
...
...
@@ -354,7 +368,9 @@ AVCodec ff_bmv_audio_decoder = {
.
name
=
"bmv_audio"
,
.
type
=
AVMEDIA_TYPE_AUDIO
,
.
id
=
CODEC_ID_BMV_AUDIO
,
.
priv_data_size
=
sizeof
(
BMVAudioDecContext
),
.
init
=
bmv_aud_decode_init
,
.
decode
=
bmv_aud_decode_frame
,
.
capabilities
=
CODEC_CAP_DR1
,
.
long_name
=
NULL_IF_CONFIG_SMALL
(
"Discworld II BMV audio"
),
};
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