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avfilter/af_loudnorm: add dual_mono option

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Signed-off-by: Kyle Swanson <k@ylo.ph>
This commit is contained in:
Kyle Swanson 2016-06-07 11:55:02 -05:00
parent 6826f16e4a
commit 765703498a
2 changed files with 14 additions and 0 deletions
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7
doc/filters.texi
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@ -2765,6 +2765,13 @@ measured_I, measured_LRA, measured_TP, and measured_thresh must also
to be specified in order to use this mode.
Options are true or false. Default is true.
@item dual_mono
Treat mono input files as "dual-mono". If a mono file is intended for playback
on a stereo system, its EBU R128 measurement will be perceptually incorrect.
If set to @code{true}, this option will compensate for this effect.
Multi-channel input files are not affected by this option.
Options are true or false. Default is false.
@item print_format
Set print format for stats. Options are summary, json, or none.
Default value is none.

7
libavfilter/af_loudnorm.c
View File

@ -60,6 +60,7 @@ typedef struct LoudNormContext {
double measured_thresh;
double offset;
int linear;
int dual_mono;
enum PrintFormat print_format;
double *buf;
@ -113,6 +114,7 @@ static const AVOption loudnorm_options[] = {
{ "measured_thresh", "measured threshold of input file", OFFSET(measured_thresh), AV_OPT_TYPE_DOUBLE, {.dbl = -70.}, -99., 0., FLAGS },
{ "offset", "set offset gain", OFFSET(offset), AV_OPT_TYPE_DOUBLE, {.dbl = 0.}, -99., 99., FLAGS },
{ "linear", "normalize linearly if possible", OFFSET(linear), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS },
{ "dual_mono", "treat mono input as dual-mono", OFFSET(dual_mono), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS },
{ "print_format", "set print format for stats", OFFSET(print_format), AV_OPT_TYPE_INT, {.i64 = NONE}, NONE, PF_NB -1, FLAGS, "print_format" },
{ "none", 0, 0, AV_OPT_TYPE_CONST, {.i64 = NONE}, 0, 0, FLAGS, "print_format" },
{ "json", 0, 0, AV_OPT_TYPE_CONST, {.i64 = JSON}, 0, 0, FLAGS, "print_format" },
@ -731,6 +733,11 @@ static int config_input(AVFilterLink *inlink)
if (!s->r128_out)
return AVERROR(ENOMEM);
if (inlink->channels == 1 && s->dual_mono) {
ebur128_set_channel(s->r128_in, 0, EBUR128_DUAL_MONO);
ebur128_set_channel(s->r128_out, 0, EBUR128_DUAL_MONO);
}
s->buf_size = frame_size(inlink->sample_rate, 3000) * inlink->channels;
s->buf = av_malloc_array(s->buf_size, sizeof(*s->buf));
if (!s->buf)