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68 lines
2.1 KiB
68 lines
2.1 KiB
/* |
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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 AVBitStreamFilter ff_opus_metadata_bsf = { |
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.name = "opus_metadata", |
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.priv_data_size = sizeof(OpusBSFContext), |
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.priv_class = &opus_metadata_class, |
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.init = &opus_metadata_init, |
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.filter = &ff_bsf_get_packet_ref, |
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.codec_ids = codec_ids, |
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};
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