FFmpeg
libavcodec
bsf
opus_metadata.c
Go to the documentation of this file.
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/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "
bsf.h
"
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#include "
bsf_internal.h
"
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#include "
libavutil/intreadwrite.h
"
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#include "
libavutil/opt.h
"
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typedef
struct
OpusBSFContext
{
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const
AVClass
*
class
;
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int
gain
;
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}
OpusBSFContext
;
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static
int
opus_metadata_init
(
AVBSFContext
*bsfc)
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{
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OpusBSFContext
*
s
= bsfc->
priv_data
;
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if
(bsfc->
par_out
->
extradata_size
< 19)
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return
AVERROR_INVALIDDATA
;
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AV_WL16
(bsfc->
par_out
->
extradata
+ 16,
s
->gain);
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return
0;
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}
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#define OFFSET(x) offsetof(OpusBSFContext, x)
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#define FLAGS (AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_BSF_PARAM)
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static
const
AVOption
opus_metadata_options
[] = {
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{
"gain"
,
"Gain, actual amplification is pow(10, gain/(20.0*256))"
,
OFFSET
(gain),
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AV_OPT_TYPE_INT
, { .i64 = 0 }, -(INT16_MAX + 1), INT16_MAX, .
flags
=
FLAGS
},
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{
NULL
},
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};
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static
const
AVClass
opus_metadata_class
= {
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.
class_name
=
"opus_metadata_bsf"
,
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.item_name =
av_default_item_name
,
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.option =
opus_metadata_options
,
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.version =
LIBAVUTIL_VERSION_INT
,
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};
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static
const
enum
AVCodecID
codec_ids
[] = {
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AV_CODEC_ID_OPUS
,
AV_CODEC_ID_NONE
,
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};
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const
FFBitStreamFilter
ff_opus_metadata_bsf
= {
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.
p
.
name
=
"opus_metadata"
,
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.p.codec_ids =
codec_ids
,
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.p.priv_class = &
opus_metadata_class
,
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.priv_data_size =
sizeof
(
OpusBSFContext
),
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.
init
= &
opus_metadata_init
,
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.
filter
= &
ff_bsf_get_packet_ref
,
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};
OpusBSFContext::gain
int gain
Definition:
opus_metadata.c:26
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition:
codec_par.h:69
opt.h
bsf_internal.h
opus_metadata_init
static int opus_metadata_init(AVBSFContext *bsfc)
Definition:
opus_metadata.c:29
AVBitStreamFilter::name
const char * name
Definition:
bsf.h:112
AVOption
AVOption.
Definition:
opt.h:429
FLAGS
#define FLAGS
Definition:
opus_metadata.c:42
filter
void(* filter)(uint8_t *src, int stride, int qscale)
Definition:
h263dsp.c:29
AVBSFContext
The bitstream filter state.
Definition:
bsf.h:68
bsf.h
OFFSET
#define OFFSET(x)
Definition:
opus_metadata.c:41
AVBSFContext::par_out
AVCodecParameters * par_out
Parameters of the output stream.
Definition:
bsf.h:96
ff_opus_metadata_bsf
const FFBitStreamFilter ff_opus_metadata_bsf
Definition:
opus_metadata.c:61
intreadwrite.h
s
#define s(width, name)
Definition:
cbs_vp9.c:198
opus_metadata_class
static const AVClass opus_metadata_class
Definition:
opus_metadata.c:50
opus_metadata_options
static const AVOption opus_metadata_options[]
Definition:
opus_metadata.c:43
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition:
version.h:85
codec_ids
static enum AVCodecID codec_ids[]
Definition:
opus_metadata.c:57
AVClass
Describe the class of an AVClass context structure.
Definition:
log.h:75
NULL
#define NULL
Definition:
coverity.c:32
FFBitStreamFilter
Definition:
bsf_internal.h:27
OpusBSFContext
Definition:
opus_metadata.c:24
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition:
log.c:237
AVCodecID
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition:
codec_id.h:49
AVCodecParameters::extradata_size
int extradata_size
Size of the extradata content in bytes.
Definition:
codec_par.h:73
FFBitStreamFilter::p
AVBitStreamFilter p
The public AVBitStreamFilter.
Definition:
bsf_internal.h:31
init
int(* init)(AVBSFContext *ctx)
Definition:
dts2pts.c:368
AV_CODEC_ID_OPUS
@ AV_CODEC_ID_OPUS
Definition:
codec_id.h:506
AV_WL16
#define AV_WL16(p, v)
Definition:
intreadwrite.h:408
AV_CODEC_ID_NONE
@ AV_CODEC_ID_NONE
Definition:
codec_id.h:50
AVBSFContext::priv_data
void * priv_data
Opaque filter-specific private data.
Definition:
bsf.h:83
AVClass::class_name
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition:
log.h:80
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Underlying C type is int.
Definition:
opt.h:259
flags
#define flags(name, subs,...)
Definition:
cbs_av1.c:482
ff_bsf_get_packet_ref
int ff_bsf_get_packet_ref(AVBSFContext *ctx, AVPacket *pkt)
Called by bitstream filters to get packet for filtering.
Definition:
bsf.c:256
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition:
error.h:61
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