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af_lavrresample: clamp float output to range 

libswresample doesn't do it - although it should, but the patch is stuck
in limbo.

Probably reduces problems with artifacts on downmixing in some cases.
This commit is contained in:
wm4 2015-11-25 22:07:18 +01:00
parent 19c1a208ec
commit 0425741754
1 changed files with 12 additions and 0 deletions
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12
audio/filter/af_lavrresample.c
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@ -423,6 +423,18 @@ static void extra_output_conversion(struct af_instance *af, struct mp_audio *mpa
}
mp_audio_set_format(mpa, AF_FORMAT_S24);
}
for (int p = 0; p < mpa->num_planes; p++) {
void *ptr = mpa->planes[p];
int total = mpa->samples * mpa->spf;
if (af_fmt_from_planar(mpa->format) == AF_FORMAT_FLOAT) {
for (int s = 0; s < total; s++)
((float *)ptr)[s] = av_clipf(((float *)ptr)[s], -1.0f, 1.0f);
} else if (af_fmt_from_planar(mpa->format) == AF_FORMAT_DOUBLE) {
for (int s = 0; s < total; s++)
((double *)ptr)[s] = av_clipd(((double *)ptr)[s], -1.0, 1.0);
}
}
}
// This relies on the tricky way mpa was allocated.