68 lines
2.1 KiB
C
68 lines
2.1 KiB
C
|
/*
|
||
|
|
* This file is part of FFmpeg.
|
||
|
|
*
|
||
|
|
* FFmpeg is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the GNU Lesser General Public
|
||
|
|
* License as published by the Free Software Foundation; either
|
||
|
|
* version 2.1 of the License, or (at your option) any later version.
|
||
|
|
*
|
||
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
|
* Lesser General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU Lesser General Public
|
||
|
|
* License along with FFmpeg; if not, write to the Free Software
|
||
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "bsf_internal.h"
|
||
|
|
#include "libavutil/intreadwrite.h"
|
||
|
|
#include "libavutil/opt.h"
|
||
|
|
|
||
|
|
typedef struct OpusBSFContext {
|
||
|
|
const AVClass *class;
|
||
|
|
int gain;
|
||
|
|
} OpusBSFContext;
|
||
|
|
|
||
|
|
static int opus_metadata_init(AVBSFContext *bsfc)
|
||
|
|
{
|
||
|
|
OpusBSFContext *s = bsfc->priv_data;
|
||
|
|
|
||
|
|
if (bsfc->par_out->extradata_size < 19)
|
||
|
|
return AVERROR_INVALIDDATA;
|
||
|
|
|
||
|
|
AV_WL16(bsfc->par_out->extradata + 16, s->gain);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
#define OFFSET(x) offsetof(OpusBSFContext, x)
|
||
|
|
#define FLAGS (AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_BSF_PARAM)
|
||
|
|
static const AVOption opus_metadata_options[] = {
|
||
|
|
{ "gain", "Gain, actual amplification is pow(10, gain/(20.0*256))", OFFSET(gain),
|
||
|
|
AV_OPT_TYPE_INT, { .i64 = 0 }, -(INT16_MAX + 1), INT16_MAX, .flags = FLAGS },
|
||
|
|
|
||
|
|
{ NULL },
|
||
|
|
};
|
||
|
|
|
||
|
|
static const AVClass opus_metadata_class = {
|
||
|
|
.class_name = "opus_metadata_bsf",
|
||
|
|
.item_name = av_default_item_name,
|
||
|
|
.option = opus_metadata_options,
|
||
|
|
.version = LIBAVUTIL_VERSION_INT,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const enum AVCodecID codec_ids[] = {
|
||
|
|
AV_CODEC_ID_OPUS, AV_CODEC_ID_NONE,
|
||
|
|
};
|
||
|
|
|
||
|
|
const AVBitStreamFilter ff_opus_metadata_bsf = {
|
||
|
|
.name = "opus_metadata",
|
||
|
|
.priv_data_size = sizeof(OpusBSFContext),
|
||
|
|
.priv_class = &opus_metadata_class,
|
||
|
|
.init = &opus_metadata_init,
|
||
|
|
.filter = &ff_bsf_get_packet_ref,
|
||
|
|
.codec_ids = codec_ids,
|
||
|
|
};
|