/* * 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 */ /** * @file * audio volume filter */ #ifndef AVFILTER_VOLUME_H #define AVFILTER_VOLUME_H #include <stdint.h> #include "libavutil/eval.h" #include "libavutil/float_dsp.h" #include "libavutil/log.h" #include "libavutil/samplefmt.h" enum PrecisionType { PRECISION_FIXED = 0, PRECISION_FLOAT, PRECISION_DOUBLE, }; enum EvalMode { EVAL_MODE_ONCE, EVAL_MODE_FRAME, EVAL_MODE_NB }; enum VolumeVarName { VAR_N, VAR_NB_CHANNELS, VAR_NB_CONSUMED_SAMPLES, VAR_NB_SAMPLES, VAR_POS, VAR_PTS, VAR_SAMPLE_RATE, VAR_STARTPTS, VAR_STARTT, VAR_T, VAR_TB, VAR_VOLUME, VAR_VARS_NB }; enum ReplayGainType { REPLAYGAIN_DROP, REPLAYGAIN_IGNORE, REPLAYGAIN_TRACK, REPLAYGAIN_ALBUM, }; typedef struct VolumeContext { const AVClass *class; AVFloatDSPContext *fdsp; int precision; int eval_mode; const char *volume_expr; AVExpr *volume_pexpr; double var_values[VAR_VARS_NB]; int replaygain; double replaygain_preamp; int replaygain_noclip; double volume; int volume_i; int channels; int planes; enum AVSampleFormat sample_fmt; void (*scale_samples)(uint8_t *dst, const uint8_t *src, int nb_samples, int volume); int samples_align; } VolumeContext; void ff_volume_init_x86(VolumeContext *vol); #endif /* AVFILTER_VOLUME_H */