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libavformat
oggparsespeex.c
Go to the documentation of this file.
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/*
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Copyright (C) 2008 Reimar Döffinger
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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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#include <stdlib.h>
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#include "
libavutil/bswap.h
"
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#include "
libavutil/avstring.h
"
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#include "
libavcodec/get_bits.h
"
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#include "
libavcodec/bytestream.h
"
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#include "
avformat.h
"
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#include "
internal.h
"
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#include "
oggdec.h
"
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struct
speex_params
{
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int
packet_size
;
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int
final_packet_duration
;
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int
seq
;
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};
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static
int
speex_header
(
AVFormatContext
*s,
int
idx) {
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struct
ogg
*
ogg
= s->
priv_data
;
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struct
ogg_stream
*os = ogg->
streams
+ idx;
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struct
speex_params
*spxp = os->
private
;
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AVStream
*st = s->
streams
[idx];
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uint8_t *p = os->
buf
+ os->
pstart
;
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if
(!spxp) {
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spxp =
av_mallocz
(
sizeof
(*spxp));
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os->
private
= spxp;
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}
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if
(spxp->
seq
> 1)
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return
0;
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if
(spxp->
seq
== 0) {
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int
frames_per_packet;
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st->
codec
->
codec_type
=
AVMEDIA_TYPE_AUDIO
;
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st->
codec
->
codec_id
=
CODEC_ID_SPEEX
;
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st->
codec
->
sample_rate
=
AV_RL32
(p + 36);
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st->
codec
->
channels
=
AV_RL32
(p + 48);
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spxp->
packet_size
=
AV_RL32
(p + 56);
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frames_per_packet =
AV_RL32
(p + 64);
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if
(frames_per_packet)
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spxp->
packet_size
*= frames_per_packet;
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st->
codec
->
extradata_size
= os->
psize
;
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st->
codec
->
extradata
=
av_malloc
(st->
codec
->
extradata_size
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+
FF_INPUT_BUFFER_PADDING_SIZE
);
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memcpy(st->
codec
->
extradata
, p, st->
codec
->
extradata_size
);
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avpriv_set_pts_info
(st, 64, 1, st->
codec
->
sample_rate
);
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}
else
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ff_vorbis_comment
(s, &st->
metadata
, p, os->
psize
);
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spxp->
seq
++;
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return
1;
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}
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static
int
ogg_page_packets
(
struct
ogg_stream
*os)
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{
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int
i;
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int
packets = 0;
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for
(i = 0; i < os->
nsegs
; i++)
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if
(os->
segments
[i] < 255)
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packets++;
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return
packets;
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}
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static
int
speex_packet
(
AVFormatContext
*s,
int
idx)
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{
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struct
ogg
*
ogg
= s->
priv_data
;
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struct
ogg_stream
*os = ogg->
streams
+ idx;
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struct
speex_params
*spxp = os->
private
;
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int
packet_size
= spxp->
packet_size
;
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if
(os->
flags
&
OGG_FLAG_EOS
&& os->
lastpts
!=
AV_NOPTS_VALUE
&&
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os->
granule
> 0) {
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/* first packet of final page. we have to calculate the final packet
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duration here because it is the only place we know the next-to-last
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granule position. */
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spxp->
final_packet_duration
= os->
granule
- os->
lastpts
-
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packet_size * (
ogg_page_packets
(os) - 1);
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}
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if
(!os->
lastpts
&& os->
granule
> 0)
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/* first packet */
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os->
lastpts
= os->
lastdts
= os->
granule
- packet_size *
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ogg_page_packets
(os);
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if
(os->
flags
&
OGG_FLAG_EOS
&& os->
segp
== os->
nsegs
&&
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spxp->
final_packet_duration
)
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/* final packet */
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os->
pduration
= spxp->
final_packet_duration
;
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else
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os->
pduration
=
packet_size
;
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return
0;
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}
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const
struct
ogg_codec
ff_speex_codec
= {
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.
magic
=
"Speex "
,
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.magicsize = 8,
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.header =
speex_header
,
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.packet =
speex_packet
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};
av_mallocz
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition:
mem.c:154
speex_params::seq
int seq
Definition:
oggparsespeex.c:37
CODEC_ID_SPEEX
Definition:
avcodec.h:375
ogg_codec
Copyright (C) 2005 Michael Ahlberg, Måns Rullgård.
Definition:
oggdec.h:31
ogg_page_packets
static int ogg_page_packets(struct ogg_stream *os)
Definition:
oggparsespeex.c:81
ff_speex_codec
const struct ogg_codec ff_speex_codec
Definition:
oggparsespeex.c:121
avpriv_set_pts_info
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the pts for a given stream.
Definition:
utils.c:3828
ogg_stream::flags
int flags
Definition:
oggdec.h:75
avstring.h
oggdec.h
ogg_stream::lastpts
int64_t lastpts
Definition:
oggdec.h:71
AVFormatContext
Format I/O context.
Definition:
avformat.h:863
ogg_stream::psize
unsigned int psize
Definition:
oggdec.h:66
speex_params::final_packet_duration
int final_packet_duration
Definition:
oggparsespeex.c:36
AVCodecContext::extradata
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition:
avcodec.h:1387
AVFormatContext::streams
AVStream ** streams
Definition:
avformat.h:908
get_bits.h
bitstream reader API header.
ff_vorbis_comment
int ff_vorbis_comment(AVFormatContext *ms, AVDictionary **m, const uint8_t *buf, int size)
Definition:
oggparsevorbis.c:71
ogg_stream
Definition:
oggdec.h:61
AV_RL32
AV_RL32
Definition:
bytestream.h:89
OGG_FLAG_EOS
#define OGG_FLAG_EOS
Definition:
oggdec.h:104
AVMEDIA_TYPE_AUDIO
Definition:
avutil.h:231
internal.h
ogg_stream::segments
uint8_t segments[255]
Definition:
oggdec.h:79
bytestream.h
AVStream::codec
AVCodecContext * codec
codec context
Definition:
avformat.h:623
speex_params
Definition:
oggparsespeex.c:34
ogg_stream::granule
uint64_t granule
Definition:
oggdec.h:70
ogg_stream::pstart
unsigned int pstart
Definition:
oggdec.h:65
ogg::streams
struct ogg_stream * streams
Definition:
oggdec.h:95
ogg_stream::segp
int segp
Definition:
oggdec.h:78
AVStream::metadata
AVDictionary * metadata
Definition:
avformat.h:718
AVStream
Stream structure.
Definition:
avformat.h:620
speex_params::packet_size
int packet_size
Definition:
oggparsespeex.c:35
AVCodecContext::codec_type
enum AVMediaType codec_type
Definition:
avcodec.h:1574
ogg_stream::pduration
unsigned int pduration
Definition:
oggdec.h:68
ogg_stream::nsegs
int nsegs
Definition:
oggdec.h:78
AVCodecContext::sample_rate
int sample_rate
samples per second
Definition:
avcodec.h:1456
speex_packet
static int speex_packet(AVFormatContext *s, int idx)
Definition:
oggparsespeex.c:91
speex_header
static int speex_header(AVFormatContext *s, int idx)
Definition:
oggparsespeex.c:40
AVCodecContext::extradata_size
int extradata_size
Definition:
avcodec.h:1388
ogg_stream::private
void * private
Definition:
oggdec.h:83
av_malloc
void * av_malloc(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition:
mem.c:64
bswap.h
byte swapping routines
FF_INPUT_BUFFER_PADDING_SIZE
#define FF_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition:
avcodec.h:497
ogg_stream::lastdts
int64_t lastdts
Definition:
oggdec.h:72
ogg_codec::magic
const int8_t * magic
Definition:
oggdec.h:32
ogg_stream::buf
uint8_t * buf
Definition:
oggdec.h:62
avformat.h
Main libavformat public API header.
ogg
Definition:
oggdec.h:94
AVCodecContext::channels
int channels
number of audio channels
Definition:
avcodec.h:1457
AVFormatContext::priv_data
void * priv_data
Format private data.
Definition:
avformat.h:883
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition:
avutil.h:271
AVCodecContext::codec_id
enum CodecID codec_id
Definition:
avcodec.h:1575