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https://github.com/FFmpeg/FFmpeg.git
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5432d2aaca
Deprecate AVStream.side_data and its helpers in favor of the AVStream's codecpar.coded_side_data. This will considerably simplify the propagation of global side data to decoders and from encoders. Instead of having to do it inside packets, it will be available during init(). Global and frame specific side data will therefore be distinct. Signed-off-by: James Almer <jamrial@gmail.com>
109 lines
3.1 KiB
C
109 lines
3.1 KiB
C
/*
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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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/**
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* @file
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* replaygain tags parsing
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*/
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include "libavutil/avstring.h"
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#include "libavutil/dict.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/mathematics.h"
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#include "libavutil/replaygain.h"
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#include "avformat.h"
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#include "internal.h"
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#include "replaygain.h"
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static int32_t parse_value(const char *value, int32_t min)
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{
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char *fraction;
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int scale = 10000;
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int32_t mb = 0;
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int sign = 1;
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int db;
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if (!value)
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return min;
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value += strspn(value, " \t");
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if (*value == '-')
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sign = -1;
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db = strtol(value, &fraction, 0);
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if (*fraction++ == '.') {
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while (av_isdigit(*fraction) && scale) {
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mb += scale * (*fraction - '0');
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scale /= 10;
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fraction++;
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}
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}
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if (llabs(db) > (INT32_MAX - mb) / 100000)
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return min;
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return db * 100000 + sign * mb;
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}
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int ff_replaygain_export_raw(AVStream *st, int32_t tg, uint32_t tp,
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int32_t ag, uint32_t ap)
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{
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AVPacketSideData *sd;
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AVReplayGain *replaygain;
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if (tg == INT32_MIN && ag == INT32_MIN)
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return 0;
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sd = av_packet_side_data_new(&st->codecpar->coded_side_data,
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&st->codecpar->nb_coded_side_data,
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AV_PKT_DATA_REPLAYGAIN,
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sizeof(*replaygain), 0);
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if (!sd)
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return AVERROR(ENOMEM);
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replaygain = (AVReplayGain*)sd->data;
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replaygain->track_gain = tg;
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replaygain->track_peak = tp;
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replaygain->album_gain = ag;
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replaygain->album_peak = ap;
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return 0;
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}
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int ff_replaygain_export(AVStream *st, AVDictionary *metadata)
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{
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const AVDictionaryEntry *tg, *tp, *ag, *ap;
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tg = av_dict_get(metadata, "REPLAYGAIN_TRACK_GAIN", NULL, 0);
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tp = av_dict_get(metadata, "REPLAYGAIN_TRACK_PEAK", NULL, 0);
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ag = av_dict_get(metadata, "REPLAYGAIN_ALBUM_GAIN", NULL, 0);
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ap = av_dict_get(metadata, "REPLAYGAIN_ALBUM_PEAK", NULL, 0);
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return ff_replaygain_export_raw(st,
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parse_value(tg ? tg->value : NULL, INT32_MIN),
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parse_value(tp ? tp->value : NULL, 0),
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parse_value(ag ? ag->value : NULL, INT32_MIN),
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parse_value(ap ? ap->value : NULL, 0));
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}
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