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| author | Paul B Mahol <onemda@gmail.com> | 2023-05-06 01:50:08 +0200 |
|---|---|---|
| committer | Paul B Mahol <onemda@gmail.com> | 2023-05-07 17:25:57 +0200 |
| commit | 7153642992c5abe33d56ca50609706bc924cd66c (patch) | |
| tree | 51288600f4abae56709d1f4a4c8da61e1e96ae8a /libavfilter | |
| parent | 782ea8b2e5a96bb18a45210f94fb427009e996b1 (diff) | |
| download | ffmpeg-7153642992c5abe33d56ca50609706bc924cd66c.tar.gz | |
avfilter/af_replaygain: export results into read-only options
Diffstat (limited to 'libavfilter')
| -rw-r--r-- | libavfilter/af_replaygain.c | 37 |
1 files changed, 32 insertions, 5 deletions
diff --git a/libavfilter/af_replaygain.c b/libavfilter/af_replaygain.c index 53852ac8bc..128454aa6b 100644 --- a/libavfilter/af_replaygain.c +++ b/libavfilter/af_replaygain.c @@ -23,8 +23,11 @@ * ReplayGain scanner */ +#include <float.h> + #include "libavutil/avassert.h" #include "libavutil/channel_layout.h" +#include "libavutil/opt.h" #include "audio.h" #include "avfilter.h" #include "internal.h" @@ -306,8 +309,11 @@ static const ReplayGainFreqInfo freqinfos[] = }; typedef struct ReplayGainContext { + const AVClass *class; + uint32_t histogram[HISTOGRAM_SLOTS]; float peak; + float gain; int yule_hist_i, butter_hist_i; const double *yule_coeff_a; const double *yule_coeff_b; @@ -576,13 +582,22 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in) return ff_filter_frame(outlink, in); } -static av_cold void uninit(AVFilterContext *ctx) +static int request_frame(AVFilterLink *outlink) { + AVFilterContext *ctx = outlink->src; ReplayGainContext *s = ctx->priv; - float gain = calc_replaygain(s->histogram); + int ret = 0; - av_log(ctx, AV_LOG_INFO, "track_gain = %+.2f dB\n", gain); - av_log(ctx, AV_LOG_INFO, "track_peak = %.6f\n", s->peak); + ret = ff_request_frame(ctx->inputs[0]); + + if (ret == AVERROR_EOF) { + s->gain = calc_replaygain(s->histogram); + + av_log(ctx, AV_LOG_INFO, "track_gain = %+.2f dB\n", s->gain); + av_log(ctx, AV_LOG_INFO, "track_peak = %.6f\n", s->peak); + } + + return ret; } static const AVFilterPad replaygain_inputs[] = { @@ -598,14 +613,26 @@ static const AVFilterPad replaygain_outputs[] = { { .name = "default", .type = AVMEDIA_TYPE_AUDIO, + .request_frame = request_frame, }, }; +#define OFFSET(x) offsetof(ReplayGainContext, x) +#define FLAGS AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_EXPORT|AV_OPT_FLAG_READONLY + +static const AVOption replaygain_options[] = { + { "track_gain", "track gain (dB)", OFFSET(gain), AV_OPT_TYPE_FLOAT,{.dbl=0}, -FLT_MAX, FLT_MAX, FLAGS }, + { "track_peak", "track peak", OFFSET(peak), AV_OPT_TYPE_FLOAT,{.dbl=0}, -FLT_MAX, FLT_MAX, FLAGS }, + { NULL } +}; + +AVFILTER_DEFINE_CLASS(replaygain); + const AVFilter ff_af_replaygain = { .name = "replaygain", .description = NULL_IF_CONFIG_SMALL("ReplayGain scanner."), - .uninit = uninit, .priv_size = sizeof(ReplayGainContext), + .priv_class = &replaygain_class, .flags = AVFILTER_FLAG_METADATA_ONLY, FILTER_INPUTS(replaygain_inputs), FILTER_OUTPUTS(replaygain_outputs), |