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Linshizhi
ffmpeg.wasm-core
Commits
6d8ccc7a
Commit
6d8ccc7a
authored
Apr 15, 2014
by
Michael Niedermayer
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avformat/flacdec/flac_read_timestamp: dont modify AVStream state
Signed-off-by:
Michael Niedermayer
<
michaelni@gmx.at
>
parent
5f4f9ee9
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12 additions
and
8 deletions
+12
-8
flacdec.c
libavformat/flacdec.c
+12
-8
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libavformat/flacdec.c
View file @
6d8ccc7a
...
...
@@ -167,17 +167,19 @@ static av_unused int64_t flac_read_timestamp(AVFormatContext *s, int stream_inde
{
AVPacket
pkt
,
out_pkt
;
AVStream
*
st
=
s
->
streams
[
stream_index
];
AVCodecParserContext
*
parser
;
int
ret
;
int64_t
pts
=
AV_NOPTS_VALUE
;
if
(
avio_seek
(
s
->
pb
,
*
ppos
,
SEEK_SET
)
<
0
)
return
AV_NOPTS_VALUE
;
av_init_packet
(
&
pkt
);
st
->
parser
=
av_parser_init
(
st
->
codec
->
codec_id
);
if
(
!
st
->
parser
){
parser
=
av_parser_init
(
st
->
codec
->
codec_id
);
if
(
!
parser
){
return
AV_NOPTS_VALUE
;
}
st
->
parser
->
flags
|=
PARSER_FLAG_USE_CODEC_TS
;
parser
->
flags
|=
PARSER_FLAG_USE_CODEC_TS
;
for
(;;){
ret
=
ff_raw_read_partial_packet
(
s
,
&
pkt
);
...
...
@@ -188,22 +190,24 @@ static av_unused int64_t flac_read_timestamp(AVFormatContext *s, int stream_inde
return
AV_NOPTS_VALUE
;
}
av_init_packet
(
&
out_pkt
);
ret
=
av_parser_parse2
(
st
->
parser
,
st
->
codec
,
ret
=
av_parser_parse2
(
parser
,
st
->
codec
,
&
out_pkt
.
data
,
&
out_pkt
.
size
,
pkt
.
data
,
pkt
.
size
,
pkt
.
pts
,
pkt
.
dts
,
*
ppos
);
if
(
out_pkt
.
size
){
int
size
=
out_pkt
.
size
;
av_free_packet
(
&
out_pkt
);
if
(
st
->
parser
->
pts
!=
AV_NOPTS_VALUE
){
if
(
parser
->
pts
!=
AV_NOPTS_VALUE
){
// seeking may not have started from beginning of a frame
// calculate frame start position from next frame backwards
*
ppos
=
st
->
parser
->
next_frame_offset
-
size
;
return
st
->
parser
->
pts
;
*
ppos
=
parser
->
next_frame_offset
-
size
;
pts
=
parser
->
pts
;
break
;
}
}
}
return
AV_NOPTS_VALUE
;
av_parser_close
(
parser
);
return
pts
;
}
AVInputFormat
ff_flac_demuxer
=
{
...
...
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