From f5e5c531170f0ce9c37e555e689ffd60694b47cd Mon Sep 17 00:00:00 2001 From: Paul B Mahol Date: Thu, 18 May 2017 23:13:52 +0200 Subject: [PATCH] avfilter/af_sofalizer: make lfe gain user configurable Default settings have it too low. Signed-off-by: Paul B Mahol --- doc/filters.texi | 3 +++ libavfilter/af_sofalizer.c | 4 +++- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/doc/filters.texi b/doc/filters.texi index b684d8dec8..296a8dcd03 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -3606,6 +3606,9 @@ Each virtual loudspeaker description is separated by '|'. For example to override front left and front right channel positions use: 'speakers=FL 45 15|FR 345 15'. Descriptions with unrecognised channel names are ignored. + +@item lfegain +Set custom gain for LFE channels. Value is in dB. Default is 0. @end table @subsection Examples diff --git a/libavfilter/af_sofalizer.c b/libavfilter/af_sofalizer.c index 622eac577c..ef723ee2c4 100644 --- a/libavfilter/af_sofalizer.c +++ b/libavfilter/af_sofalizer.c @@ -70,6 +70,7 @@ typedef struct SOFAlizerContext { float *speaker_azim; /* azimuth of the virtual loudspeakers */ float *speaker_elev; /* elevation of the virtual loudspeakers */ char *speakers_pos; /* custom positions of the virtual loudspeakers */ + float lfe_gain; /* initial gain for the LFE channel */ float gain_lfe; /* gain applied to LFE channel */ int lfe_channel; /* LFE channel position in channel layout */ @@ -1067,7 +1068,7 @@ static int config_input(AVFilterLink *inlink) } /* gain -3 dB per channel, -6 dB to get LFE on a similar level */ - s->gain_lfe = expf((s->gain - 3 * inlink->channels - 6) / 20 * M_LN10); + s->gain_lfe = expf((s->gain - 3 * inlink->channels - 6 + s->lfe_gain) / 20 * M_LN10); s->n_conv = nb_input_channels; @@ -1197,6 +1198,7 @@ static const AVOption sofalizer_options[] = { { "time", "time domain", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, .flags = FLAGS, "type" }, { "freq", "frequency domain", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, .flags = FLAGS, "type" }, { "speakers", "set speaker custom positions", OFFSET(speakers_pos), AV_OPT_TYPE_STRING, {.str=0}, 0, 0, .flags = FLAGS }, + { "lfegain", "set lfe gain", OFFSET(lfe_gain), AV_OPT_TYPE_FLOAT, {.dbl=0}, -9, 9, .flags = FLAGS }, { NULL } };