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libavformat
oggdec.h
Go to the documentation of this file.
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/**
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Copyright (C) 2005 Michael Ahlberg, Måns Rullgård
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Permission is hereby granted, free of charge, to any person
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obtaining a copy of this software and associated documentation
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files (the "Software"), to deal in the Software without
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restriction, including without limitation the rights to use, copy,
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modify, merge, publish, distribute, sublicense, and/or sell copies
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of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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**/
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#ifndef AVFORMAT_OGGDEC_H
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#define AVFORMAT_OGGDEC_H
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#include "
avformat.h
"
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#include "
metadata.h
"
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struct
ogg_codec
{
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const
int8_t *
magic
;
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uint8_t
magicsize
;
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const
int8_t *
name
;
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/**
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* Attempt to process a packet as a header
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* @return 1 if the packet was a valid header,
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* 0 if the packet was not a header (was a data packet)
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* -1 if an error occurred or for unsupported stream
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*/
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int (*
header
)(
AVFormatContext
*, int);
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int (*
packet
)(
AVFormatContext
*, int);
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/**
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* Translate a granule into a timestamp.
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* Will set dts if non-null and known.
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* @return pts
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*/
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uint64_t (*
gptopts
)(
AVFormatContext
*, int, uint64_t, int64_t *dts);
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/**
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* 1 if granule is the start time of the associated packet.
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* 0 if granule is the end time of the associated packet.
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*/
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int
granule_is_start
;
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/**
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* Number of expected headers
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*/
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int
nb_header
;
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void
(*
cleanup
)(
AVFormatContext
*
s
,
int
idx);
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};
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struct
ogg_stream
{
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uint8_t
*
buf
;
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unsigned
int
bufsize
;
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unsigned
int
bufpos
;
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unsigned
int
pstart
;
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unsigned
int
psize
;
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unsigned
int
pflags
;
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unsigned
int
pduration
;
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uint32_t
serial
;
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uint64_t
granule
;
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uint64_t
start_granule
;
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int64_t
lastpts
;
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int64_t
lastdts
;
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int64_t
sync_pos
;
///< file offset of the first page needed to reconstruct the current packet
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int64_t
page_pos
;
///< file offset of the current page
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int
flags
;
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const
struct
ogg_codec
*
codec
;
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int
header
;
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int
nsegs
,
segp
;
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uint8_t
segments
[255];
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int
incomplete
;
///< whether we're expecting a continuation in the next page
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int
page_end
;
///< current packet is the last one completed in the page
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int
keyframe_seek
;
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int
got_start
;
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int
got_data
;
///< 1 if the stream got some data (non-initial packets), 0 otherwise
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int
nb_header
;
///< set to the number of parsed headers
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int
end_trimming
;
///< set the number of packets to drop from the end
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uint8_t
*
new_metadata
;
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unsigned
int
new_metadata_size
;
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void
*
private
;
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};
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struct
ogg_state
{
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uint64_t
pos
;
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int
curidx
;
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struct
ogg_state
*
next
;
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int
nstreams
;
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struct
ogg_stream
streams
[1];
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};
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struct
ogg
{
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struct
ogg_stream
*
streams
;
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int
nstreams
;
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int
headers
;
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int
curidx
;
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int64_t
page_pos
;
///< file offset of the current page
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struct
ogg_state
*
state
;
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};
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#define OGG_FLAG_CONT 1
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#define OGG_FLAG_BOS 2
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#define OGG_FLAG_EOS 4
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#define OGG_NOGRANULE_VALUE (-1ull)
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extern
const
struct
ogg_codec
ff_celt_codec
;
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extern
const
struct
ogg_codec
ff_dirac_codec
;
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extern
const
struct
ogg_codec
ff_flac_codec
;
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extern
const
struct
ogg_codec
ff_ogm_audio_codec
;
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extern
const
struct
ogg_codec
ff_ogm_old_codec
;
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extern
const
struct
ogg_codec
ff_ogm_text_codec
;
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extern
const
struct
ogg_codec
ff_ogm_video_codec
;
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extern
const
struct
ogg_codec
ff_old_dirac_codec
;
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extern
const
struct
ogg_codec
ff_old_flac_codec
;
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extern
const
struct
ogg_codec
ff_opus_codec
;
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extern
const
struct
ogg_codec
ff_skeleton_codec
;
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extern
const
struct
ogg_codec
ff_speex_codec
;
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extern
const
struct
ogg_codec
ff_theora_codec
;
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extern
const
struct
ogg_codec
ff_vorbis_codec
;
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extern
const
struct
ogg_codec
ff_vp8_codec
;
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int
ff_vorbis_comment
(
AVFormatContext
*ms,
AVDictionary
**
m
,
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const
uint8_t
*
buf
,
int
size
,
int
parse_picture);
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int
ff_vorbis_stream_comment
(
AVFormatContext
*as,
AVStream
*st,
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const
uint8_t
*
buf
,
int
size
);
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static
inline
int
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ogg_find_stream
(
struct
ogg
*
ogg
,
int
serial)
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{
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int
i;
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for
(i = 0; i < ogg->
nstreams
; i++)
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if
(ogg->
streams
[i].
serial
== serial)
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return
i;
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return
-1;
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}
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static
inline
uint64_t
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ogg_gptopts
(
AVFormatContext
*
s
,
int
i, uint64_t
gp
, int64_t *dts)
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{
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struct
ogg
*
ogg
= s->
priv_data
;
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struct
ogg_stream
*os = ogg->
streams
+ i;
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uint64_t
pts
=
AV_NOPTS_VALUE
;
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if
(os->
codec
&& os->
codec
->
gptopts
){
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pts = os->
codec
->
gptopts
(s, i, gp, dts);
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}
else
{
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pts =
gp
;
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if
(dts)
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*dts =
pts
;
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}
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return
pts
;
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}
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#endif
/* AVFORMAT_OGGDEC_H */
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