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| author | Paul B Mahol <onemda@gmail.com> | 2016-01-04 12:50:36 +0100 |
|---|---|---|
| committer | Paul B Mahol <onemda@gmail.com> | 2016-01-04 14:06:51 +0100 |
| commit | 6defda1cdb41cad1e9fe37c558a9d859b983946f (patch) | |
| tree | e6fe6eea1071dbaeba4e12741a28ed9f6eef4928 /libavfilter | |
| parent | 1cb2331eca0dbde1bc63bc715a0e98771dda8b80 (diff) | |
| download | ffmpeg-6defda1cdb41cad1e9fe37c558a9d859b983946f.tar.gz | |
avfilter/avf_showspectrum: add option to set gain for calculating color intensity
Inspired by Sonic Visualizer.
Signed-off-by: Paul B Mahol <onemda@gmail.com>
Diffstat (limited to 'libavfilter')
| -rw-r--r-- | libavfilter/avf_showspectrum.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/libavfilter/avf_showspectrum.c b/libavfilter/avf_showspectrum.c index 48d811e2c4..accd8c7911 100644 --- a/libavfilter/avf_showspectrum.c +++ b/libavfilter/avf_showspectrum.c @@ -68,6 +68,7 @@ typedef struct { int win_size; double win_scale; float overlap; + float gain; int skip_samples; float *combine_buffer; ///< color combining buffer (3 * h items) AVAudioFifo *fifo; @@ -125,6 +126,7 @@ static const AVOption showspectrum_options[] = { { "vertical", NULL, 0, AV_OPT_TYPE_CONST, {.i64=VERTICAL}, 0, 0, FLAGS, "orientation" }, { "horizontal", NULL, 0, AV_OPT_TYPE_CONST, {.i64=HORIZONTAL}, 0, 0, FLAGS, "orientation" }, { "overlap", "set window overlap", OFFSET(overlap), AV_OPT_TYPE_FLOAT, {.dbl = 0}, 0, 1, FLAGS }, + { "gain", "set scale gain", OFFSET(gain), AV_OPT_TYPE_FLOAT, {.dbl = 1}, 0, 128, FLAGS }, { NULL } }; @@ -497,6 +499,7 @@ static int plot_spectrum_column(AVFilterLink *inlink, AVFrame *insamples) ShowSpectrumContext *s = ctx->priv; AVFrame *outpicref = s->outpicref; const double w = s->win_scale; + const float g = s->gain; int h = s->orientation == VERTICAL ? s->channel_height : s->channel_width; int ch, plane, x, y; @@ -562,7 +565,7 @@ static int plot_spectrum_column(AVFilterLink *inlink, AVFrame *insamples) float *out = &s->combine_buffer[3 * row]; /* get magnitude */ - float a = w * magnitudes[y]; + float a = g * w * magnitudes[y]; /* apply scale */ switch (s->scale) { @@ -814,6 +817,7 @@ static const AVOption showspectrumpic_options[] = { { "orientation", "set orientation", OFFSET(orientation), AV_OPT_TYPE_INT, {.i64=VERTICAL}, 0, NB_ORIENTATIONS-1, FLAGS, "orientation" }, { "vertical", NULL, 0, AV_OPT_TYPE_CONST, {.i64=VERTICAL}, 0, 0, FLAGS, "orientation" }, { "horizontal", NULL, 0, AV_OPT_TYPE_CONST, {.i64=HORIZONTAL}, 0, 0, FLAGS, "orientation" }, + { "gain", "set scale gain", OFFSET(gain), AV_OPT_TYPE_FLOAT, {.dbl = 1}, 0, 128, FLAGS }, { NULL } }; |