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Linshizhi
ffmpeg.wasm-core
Commits
03372d0a
Commit
03372d0a
authored
Mar 29, 2017
by
Matthieu Bouron
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doc/examples/filtering_audio: switch to new decoding API
parent
afd257b4
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1 changed file
with
30 additions
and
33 deletions
+30
-33
filtering_audio.c
doc/examples/filtering_audio.c
+30
-33
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doc/examples/filtering_audio.c
View file @
03372d0a
...
...
@@ -216,10 +216,9 @@ static void print_frame(const AVFrame *frame)
int
main
(
int
argc
,
char
**
argv
)
{
int
ret
;
AVPacket
packet
0
,
packet
;
AVPacket
packet
;
AVFrame
*
frame
=
av_frame_alloc
();
AVFrame
*
filt_frame
=
av_frame_alloc
();
int
got_frame
;
if
(
!
frame
||
!
filt_frame
)
{
perror
(
"Could not allocate frame"
);
...
...
@@ -239,28 +238,29 @@ int main(int argc, char **argv)
goto
end
;
/* read all packets */
packet0
.
data
=
NULL
;
packet
.
data
=
NULL
;
while
(
1
)
{
if
(
!
packet0
.
data
)
{
if
((
ret
=
av_read_frame
(
fmt_ctx
,
&
packet
))
<
0
)
break
;
packet0
=
packet
;
}
if
(
packet
.
stream_index
==
audio_stream_index
)
{
got_frame
=
0
;
ret
=
avcodec_decode_audio4
(
dec_ctx
,
frame
,
&
got_frame
,
&
packet
);
ret
=
avcodec_send_packet
(
dec_ctx
,
&
packet
);
if
(
ret
<
0
)
{
av_log
(
NULL
,
AV_LOG_ERROR
,
"Error decoding audio
\n
"
);
continue
;
av_log
(
NULL
,
AV_LOG_ERROR
,
"Error while sending a packet to the decoder
\n
"
);
break
;
}
while
(
ret
>=
0
)
{
ret
=
avcodec_receive_frame
(
dec_ctx
,
frame
);
if
(
ret
==
AVERROR
(
EAGAIN
)
||
ret
==
AVERROR_EOF
)
{
break
;
}
else
if
(
ret
<
0
)
{
av_log
(
NULL
,
AV_LOG_ERROR
,
"Error while receiving a frame from the decoder
\n
"
);
goto
end
;
}
packet
.
size
-=
ret
;
packet
.
data
+=
ret
;
if
(
got_frame
)
{
if
(
ret
>=
0
)
{
/* push the audio data from decoded frame into the filtergraph */
if
(
av_buffersrc_add_frame_flags
(
buffersrc_ctx
,
frame
,
0
)
<
0
)
{
if
(
av_buffersrc_add_frame_flags
(
buffersrc_ctx
,
frame
,
AV_BUFFERSRC_FLAG_KEEP_REF
)
<
0
)
{
av_log
(
NULL
,
AV_LOG_ERROR
,
"Error while feeding the audio filtergraph
\n
"
);
break
;
}
...
...
@@ -275,14 +275,11 @@ int main(int argc, char **argv)
print_frame
(
filt_frame
);
av_frame_unref
(
filt_frame
);
}
av_frame_unref
(
frame
);
}
}
if
(
packet
.
size
<=
0
)
av_packet_unref
(
&
packet0
);
}
else
{
/* discard non-wanted packets */
av_packet_unref
(
&
packet0
);
}
av_packet_unref
(
&
packet
);
}
end:
avfilter_graph_free
(
&
filter_graph
);
...
...
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