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Linshizhi
ffmpeg.wasm-core
Commits
43880f97
Commit
43880f97
authored
Apr 27, 2016
by
Martin Storsjö
Committed by
Thomas Volkert
Jun 14, 2016
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rtpdec_vp9: Update header parsing to spec draft 02
Signed-off-by:
Martin Storsjö
<
martin@martin.st
>
parent
03aa4cd2
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1 changed file
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12 additions
and
22 deletions
+12
-22
rtpdec_vp9.c
libavformat/rtpdec_vp9.c
+12
-22
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libavformat/rtpdec_vp9.c
View file @
43880f97
/*
* RTP parser for VP9 payload format (draft version 0) - experimental
* RTP parser for VP9 payload format (draft version 0
2
) - experimental
* Copyright (c) 2015 Thomas Volkert <thomas@homer-conferencing.com>
*
* This file is part of FFmpeg.
...
...
@@ -45,8 +45,8 @@ static int vp9_handle_packet(AVFormatContext *ctx, PayloadContext *rtp_vp9_ctx,
const
uint8_t
*
buf
,
int
len
,
uint16_t
seq
,
int
flags
)
{
int
has_pic_id
,
has_layer_idc
,
has_ref_idc
,
has_ss_data
,
has_su_data
;
av_unused
int
pic_id
=
0
,
non_key_frame
=
0
;
int
has_pic_id
,
has_layer_idc
,
has_ref_idc
,
has_ss_data
;
av_unused
int
pic_id
=
0
,
non_key_frame
=
0
,
inter_picture_layer_frame
;
av_unused
int
layer_temporal
=
-
1
,
layer_spatial
=
-
1
,
layer_quality
=
-
1
;
int
ref_fields
=
0
,
has_ref_field_ext_pic_id
=
0
;
int
first_fragment
,
last_fragment
;
...
...
@@ -68,24 +68,24 @@ static int vp9_handle_packet(AVFormatContext *ctx, PayloadContext *rtp_vp9_ctx,
*
* 0 1 2 3 4 5 6 7
* +-+-+-+-+-+-+-+-+
* |I|
L|F|B|E|V|U
|-| (REQUIRED)
* |I|
P|L|F|B|E|V
|-| (REQUIRED)
* +-+-+-+-+-+-+-+-+
*
* I: PictureID present
* P: Inter-picture predicted layer frame
* L: Layer indices present
* F:
Reference indices present
* F:
Flexible mode
* B: Start of VP9 frame
* E: End of picture
* V: Scalability Structure (SS) present
* U: Scalability Structure Update (SU) present
*/
has_pic_id
=
!!
(
buf
[
0
]
&
0x80
);
has_layer_idc
=
!!
(
buf
[
0
]
&
0x40
);
has_
ref_idc
=
!!
(
buf
[
0
]
&
0x20
);
first_fragment
=
!!
(
buf
[
0
]
&
0x10
);
last_fragment
=
!!
(
buf
[
0
]
&
0x08
);
has_ss_data
=
!!
(
buf
[
0
]
&
0x04
);
has_s
u
_data
=
!!
(
buf
[
0
]
&
0x02
);
inter_picture_layer_frame
=
!!
(
buf
[
0
]
&
0x40
);
has_
layer_idc
=
!!
(
buf
[
0
]
&
0x20
);
has_ref_idc
=
!!
(
buf
[
0
]
&
0x10
);
first_fragment
=
!!
(
buf
[
0
]
&
0x08
);
last_fragment
=
!!
(
buf
[
0
]
&
0x04
);
has_s
s
_data
=
!!
(
buf
[
0
]
&
0x02
);
rtp_m
=
!!
(
flags
&
RTP_FLAG_MARKER
);
...
...
@@ -226,16 +226,6 @@ static int vp9_handle_packet(AVFormatContext *ctx, PayloadContext *rtp_vp9_ctx,
return
AVERROR
(
ENOSYS
);
}
/*
* decode the scalability update structure (SU)
*
* spec. is tbd
*/
if
(
has_su_data
)
{
avpriv_report_missing_feature
(
ctx
,
"VP9 scalability update structure data"
);
return
AVERROR
(
ENOSYS
);
}
/*
* decode the VP9 payload header
*
...
...
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