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Linshizhi
ffmpeg.wasm-core
Commits
99b170f8
Commit
99b170f8
authored
Feb 10, 2009
by
Baptiste Coudurier
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write body partitions
Originally committed as revision 17126 to
svn://svn.ffmpeg.org/ffmpeg/trunk
parent
7524f46e
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Showing
1 changed file
with
65 additions
and
16 deletions
+65
-16
mxfenc.c
libavformat/mxfenc.c
+65
-16
No files found.
libavformat/mxfenc.c
View file @
99b170f8
...
...
@@ -44,7 +44,7 @@
static
const
int
NTSC_samples_per_frame
[]
=
{
1602
,
1601
,
1602
,
1601
,
1602
,
0
};
static
const
int
PAL_samples_per_frame
[]
=
{
1920
,
0
};
#define
MXF_INDEX_CLUSTER_SIZE 4096
#define
EDIT_UNITS_PER_BODY 250
#define KAG_SIZE 512
typedef
struct
{
...
...
@@ -119,6 +119,12 @@ typedef struct MXFContext {
unsigned
edit_units_count
;
uint64_t
timestamp
;
///< timestamp, as year(16),month(8),day(8),hour(8),minutes(8),msec/4(8)
uint8_t
slice_count
;
///< index slice count minus 1 (1 if no audio, 0 otherwise)
int
last_indexed_edit_unit
;
uint64_t
first_edit_unit_offset
;
uint64_t
*
body_partition_offset
;
unsigned
body_partitions_count
;
int
last_key_index
;
///< index of last key frame
uint64_t
body_offset
;
}
MXFContext
;
static
const
uint8_t
uuid_base
[]
=
{
0xAD
,
0xAB
,
0x44
,
0x24
,
0x2f
,
0x25
,
0x4d
,
0xc7
,
0x92
,
0xff
,
0x29
,
0xbd
};
...
...
@@ -135,6 +141,7 @@ static const uint8_t random_index_pack_key[] = { 0x06,0x0E,0x2B,0x34,0x02,
static
const
uint8_t
header_open_partition_key
[]
=
{
0x06
,
0x0E
,
0x2B
,
0x34
,
0x02
,
0x05
,
0x01
,
0x01
,
0x0D
,
0x01
,
0x02
,
0x01
,
0x01
,
0x02
,
0x01
,
0x00
};
// OpenIncomplete
static
const
uint8_t
header_closed_partition_key
[]
=
{
0x06
,
0x0E
,
0x2B
,
0x34
,
0x02
,
0x05
,
0x01
,
0x01
,
0x0D
,
0x01
,
0x02
,
0x01
,
0x01
,
0x02
,
0x04
,
0x00
};
// ClosedComplete
static
const
uint8_t
klv_fill_key
[]
=
{
0x06
,
0x0E
,
0x2B
,
0x34
,
0x01
,
0x01
,
0x01
,
0x01
,
0x03
,
0x01
,
0x02
,
0x10
,
0x01
,
0x00
,
0x00
,
0x00
};
static
const
uint8_t
body_partition_key
[]
=
{
0x06
,
0x0E
,
0x2B
,
0x34
,
0x02
,
0x05
,
0x01
,
0x01
,
0x0D
,
0x01
,
0x02
,
0x01
,
0x01
,
0x03
,
0x04
,
0x00
};
// ClosedComplete
/**
* partial key for header metadata
...
...
@@ -875,10 +882,13 @@ static void mxf_write_index_table_segment(AVFormatContext *s)
ByteIOContext
*
pb
=
s
->
pb
;
int
i
,
j
;
int
temporal_reordering
=
0
;
int
last_key_index
=
0
,
key_index
=
0
;
int
key_index
=
0
;
av_log
(
s
,
AV_LOG_DEBUG
,
"edit units count %d
\n
"
,
mxf
->
edit_units_count
);
if
(
!
mxf
->
edit_units_count
)
return
;
put_buffer
(
pb
,
index_table_segment_key
,
16
);
klv_encode_ber_length
(
pb
,
109
+
(
s
->
nb_streams
+
1
)
*
6
+
mxf
->
edit_units_count
*
(
11
+
mxf
->
slice_count
*
4
));
...
...
@@ -894,7 +904,7 @@ static void mxf_write_index_table_segment(AVFormatContext *s)
// index start position
mxf_write_local_tag
(
pb
,
8
,
0x3F0C
);
put_be64
(
pb
,
0
);
put_be64
(
pb
,
mxf
->
last_indexed_edit_unit
);
// index duration
mxf_write_local_tag
(
pb
,
8
,
0x3F0D
);
...
...
@@ -965,23 +975,26 @@ static void mxf_write_index_table_segment(AVFormatContext *s)
}
else
put_byte
(
pb
,
0
);
if
(
!
(
mxf
->
index_entries
[
i
].
flags
&
0x33
))
{
// I frame
last_key_index
=
key_index
;
mxf
->
last_key_index
=
key_index
;
key_index
=
i
;
}
if
(
mxf
->
index_entries
[
i
].
flags
&
0x10
&&
// backward prediction
!
(
mxf
->
index_entries
[
key_index
].
flags
&
0x80
))
{
// open gop
put_byte
(
pb
,
last_key_index
-
i
);
put_byte
(
pb
,
mxf
->
last_key_index
-
i
);
}
else
{
put_byte
(
pb
,
key_index
-
i
);
// key frame offset
if
((
mxf
->
index_entries
[
i
].
flags
&
0x20
)
==
0x20
)
// only forward
last_key_index
=
key_index
;
mxf
->
last_key_index
=
key_index
;
}
put_byte
(
pb
,
mxf
->
index_entries
[
i
].
flags
);
// stream offset
put_be64
(
pb
,
mxf
->
index_entries
[
i
].
offset
-
mxf
->
index_entries
[
0
].
offset
);
put_be64
(
pb
,
mxf
->
index_entries
[
i
].
offset
-
mxf
->
first_edit_unit_
offset
);
if
(
s
->
nb_streams
>
1
)
put_be32
(
pb
,
mxf
->
index_entries
[
i
].
slice_offset
);
}
mxf
->
last_indexed_edit_unit
+=
mxf
->
edit_units_count
;
mxf
->
edit_units_count
=
0
;
}
static
void
mxf_write_klv_fill
(
AVFormatContext
*
s
)
...
...
@@ -1015,6 +1028,16 @@ static void mxf_write_partition(AVFormatContext *s, int bodysid,
// add encoded ber length
index_byte_count
+=
16
+
klv_ber_length
(
index_byte_count
);
index_byte_count
+=
klv_fill_size
(
index_byte_count
);
mxf
->
body_offset
+=
url_ftell
(
pb
)
-
mxf
->
index_entries
[
0
].
offset
;
}
if
(
!
memcmp
(
key
,
body_partition_key
,
16
))
{
mxf
->
body_partition_offset
=
av_realloc
(
mxf
->
body_partition_offset
,
(
mxf
->
body_partitions_count
+
1
)
*
sizeof
(
*
mxf
->
body_partition_offset
));
mxf
->
body_partition_offset
[
mxf
->
body_partitions_count
++
]
=
url_ftell
(
pb
);
}
// write klv
...
...
@@ -1028,7 +1051,13 @@ static void mxf_write_partition(AVFormatContext *s, int bodysid,
put_be32
(
pb
,
KAG_SIZE
);
// KAGSize
put_be64
(
pb
,
url_ftell
(
pb
)
-
25
);
// thisPartition
put_be64
(
pb
,
0
);
// previousPartition
if
(
!
memcmp
(
key
,
body_partition_key
,
16
)
&&
mxf
->
body_partitions_count
>
1
)
put_be64
(
pb
,
mxf
->
body_partition_offset
[
mxf
->
body_partitions_count
-
2
]);
// PreviousPartition
else
if
(
!
memcmp
(
key
,
footer_partition_key
,
16
))
put_be64
(
pb
,
mxf
->
body_partition_offset
[
mxf
->
body_partitions_count
-
1
]);
// PreviousPartition
else
put_be64
(
pb
,
0
);
put_be64
(
pb
,
mxf
->
footer_partition_offset
);
// footerPartition
...
...
@@ -1039,7 +1068,10 @@ static void mxf_write_partition(AVFormatContext *s, int bodysid,
// indexTable
put_be64
(
pb
,
index_byte_count
);
// indexByteCount
put_be32
(
pb
,
index_byte_count
?
indexsid
:
0
);
// indexSID
put_be64
(
pb
,
0
);
// bodyOffset
// BodyOffset
if
(
bodysid
)
put_be64
(
pb
,
mxf
->
body_offset
);
else
put_be64
(
pb
,
0
);
put_be32
(
pb
,
bodysid
);
// bodySID
...
...
@@ -1311,10 +1343,9 @@ static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
MXFStreamContext
*
sc
=
st
->
priv_data
;
int
flags
=
0
;
if
(
!
(
mxf
->
edit_units_count
%
MXF_INDEX_CLUSTER_SIZE
))
{
if
(
!
(
mxf
->
edit_units_count
%
EDIT_UNITS_PER_BODY
))
{
mxf
->
index_entries
=
av_realloc
(
mxf
->
index_entries
,
(
mxf
->
edit_units_count
+
MXF_INDEX_CLUSTER_SIZE
)
*
sizeof
(
*
mxf
->
index_entries
));
(
mxf
->
edit_units_count
+
EDIT_UNITS_PER_BODY
)
*
sizeof
(
*
mxf
->
index_entries
));
if
(
!
mxf
->
index_entries
)
{
av_log
(
s
,
AV_LOG_ERROR
,
"could not allocate index entries
\n
"
);
return
-
1
;
...
...
@@ -1329,14 +1360,25 @@ static int mxf_write_packet(AVFormatContext *s, AVPacket *pkt)
}
if
(
!
mxf
->
header_written
)
{
mxf_write_partition
(
s
,
1
,
0
,
header_open_partition_key
,
1
);
mxf_write_partition
(
s
,
0
,
0
,
header_open_partition_key
,
1
);
mxf
->
header_written
=
1
;
}
if
(
st
->
index
==
0
)
{
if
((
!
mxf
->
edit_units_count
||
mxf
->
edit_units_count
>
EDIT_UNITS_PER_BODY
)
&&
!
(
flags
&
0x33
))
{
// I frame, Gop start
mxf_write_klv_fill
(
s
);
mxf_write_partition
(
s
,
1
,
2
,
body_partition_key
,
0
);
mxf_write_klv_fill
(
s
);
mxf_write_index_table_segment
(
s
);
}
mxf_write_klv_fill
(
s
);
mxf
->
index_entries
[
mxf
->
edit_units_count
].
offset
=
url_ftell
(
pb
);
mxf
->
index_entries
[
mxf
->
edit_units_count
].
flags
=
flags
;
if
(
!
mxf
->
first_edit_unit_offset
)
mxf
->
first_edit_unit_offset
=
mxf
->
index_entries
[
0
].
offset
;
mxf_write_system_item
(
s
);
mxf
->
edit_units_count
++
;
...
...
@@ -1361,13 +1403,19 @@ static void mxf_write_random_index_pack(AVFormatContext *s)
MXFContext
*
mxf
=
s
->
priv_data
;
ByteIOContext
*
pb
=
s
->
pb
;
uint64_t
pos
=
url_ftell
(
pb
);
int
i
;
put_buffer
(
pb
,
random_index_pack_key
,
16
);
klv_encode_ber_length
(
pb
,
28
);
klv_encode_ber_length
(
pb
,
28
+
12
*
mxf
->
body_partitions_count
);
put_be32
(
pb
,
1
);
// BodySID of header partition
put_be32
(
pb
,
0
);
// BodySID of header partition
put_be64
(
pb
,
0
);
// offset of header partition
for
(
i
=
0
;
i
<
mxf
->
body_partitions_count
;
i
++
)
{
put_be32
(
pb
,
1
);
// BodySID
put_be64
(
pb
,
mxf
->
body_partition_offset
[
i
]);
}
put_be32
(
pb
,
0
);
// BodySID of footer partition
put_be64
(
pb
,
mxf
->
footer_partition_offset
);
...
...
@@ -1391,12 +1439,13 @@ static int mxf_write_footer(AVFormatContext *s)
if
(
!
url_is_streamed
(
s
->
pb
))
{
url_fseek
(
pb
,
0
,
SEEK_SET
);
mxf_write_partition
(
s
,
1
,
0
,
header_closed_partition_key
,
1
);
mxf_write_partition
(
s
,
0
,
0
,
header_closed_partition_key
,
1
);
}
ff_audio_interleave_close
(
s
);
av_freep
(
&
mxf
->
index_entries
);
av_freep
(
&
mxf
->
body_partition_offset
);
mxf_free
(
s
);
return
0
;
...
...
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