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author | Paul B Mahol <onemda@gmail.com> | 2019-04-22 17:11:01 +0200 |
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committer | Paul B Mahol <onemda@gmail.com> | 2019-04-22 22:15:01 +0200 |
commit | dbb35abf2897a7a3966378884f680e787b006991 (patch) | |
tree | 892e4c896e0e71b9865bab668f1ba6d4bb01ec6a /libavfilter | |
parent | c6c94303d44798f968fa57f282627b1c5e60ce85 (diff) | |
download | ffmpeg-streaming-dbb35abf2897a7a3966378884f680e787b006991.zip ffmpeg-streaming-dbb35abf2897a7a3966378884f680e787b006991.tar.gz |
avfilter/af_surround: add lfe_mode option
Diffstat (limited to 'libavfilter')
-rw-r--r-- | libavfilter/af_surround.c | 25 |
1 files changed, 15 insertions, 10 deletions
diff --git a/libavfilter/af_surround.c b/libavfilter/af_surround.c index d7690cf..6e6f526 100644 --- a/libavfilter/af_surround.c +++ b/libavfilter/af_surround.c @@ -39,6 +39,7 @@ typedef struct AudioSurroundContext { float fc_out; float lfe_in; float lfe_out; + int lfe_mode; int win_func; float overlap; @@ -237,12 +238,13 @@ static void stereo_position(float a, float p, float *x, float *y) } static inline void get_lfe(int output_lfe, int n, float lowcut, float highcut, - float *lfe_mag, float *mag_total) + float *lfe_mag, float *mag_total, int lfe_mode) { if (output_lfe && n < highcut) { *lfe_mag = n < lowcut ? 1.f : .5f*(1.f+cosf(M_PI*(lowcut-n)/(lowcut-highcut))); *lfe_mag *= *mag_total; - *mag_total -= *lfe_mag; + if (lfe_mode) + *mag_total -= *lfe_mag; } else { *lfe_mag = 0.f; } @@ -306,7 +308,7 @@ static void upmix_2_1(AVFilterContext *ctx, dstr = (float *)s->output->extended_data[1]; dstlfe = (float *)s->output->extended_data[2]; - get_lfe(s->output_lfe, n, s->lowcut, s->highcut, &lfe_mag, &mag_total); + get_lfe(s->output_lfe, n, s->lowcut, s->highcut, &lfe_mag, &mag_total, s->lfe_mode); l_mag = sqrtf(.5f * ( x + 1.f)) * ((y + 1.f) * .5f) * mag_total; r_mag = sqrtf(.5f * (-x + 1.f)) * ((y + 1.f) * .5f) * mag_total; @@ -366,7 +368,7 @@ static void upmix_3_1(AVFilterContext *ctx, dstc = (float *)s->output->extended_data[2]; dstlfe = (float *)s->output->extended_data[3]; - get_lfe(s->output_lfe, n, s->lowcut, s->highcut, &lfe_mag, &mag_total); + get_lfe(s->output_lfe, n, s->lowcut, s->highcut, &lfe_mag, &mag_total, s->lfe_mode); c_mag = sqrtf(1.f - fabsf(x)) * ((y + 1.f) * .5f) * mag_total; l_mag = sqrtf(.5f * ( x + 1.f)) * ((y + 1.f) * .5f) * mag_total; @@ -402,7 +404,7 @@ static void upmix_3_1_surround(AVFilterContext *ctx, dstc = (float *)s->output->extended_data[2]; dstlfe = (float *)s->output->extended_data[3]; - get_lfe(s->output_lfe, n, s->lowcut, s->highcut, &lfe_mag, &c_mag); + get_lfe(s->output_lfe, n, s->lowcut, s->highcut, &lfe_mag, &c_mag, s->lfe_mode); l_mag = sqrtf(.5f * ( x + 1.f)) * ((y + 1.f) * .5f) * mag_total; r_mag = sqrtf(.5f * (-x + 1.f)) * ((y + 1.f) * .5f) * mag_total; @@ -471,7 +473,7 @@ static void upmix_4_1(AVFilterContext *ctx, dstlfe = (float *)s->output->extended_data[3]; dstb = (float *)s->output->extended_data[4]; - get_lfe(s->output_lfe, n, s->lowcut, s->highcut, &lfe_mag, &mag_total); + get_lfe(s->output_lfe, n, s->lowcut, s->highcut, &lfe_mag, &mag_total, s->lfe_mode); dstlfe[2 * n ] = lfe_mag * cosf(c_phase); dstlfe[2 * n + 1] = lfe_mag * sinf(c_phase); @@ -551,7 +553,7 @@ static void upmix_5_1_back(AVFilterContext *ctx, dstls = (float *)s->output->extended_data[4]; dstrs = (float *)s->output->extended_data[5]; - get_lfe(s->output_lfe, n, s->lowcut, s->highcut, &lfe_mag, &mag_total); + get_lfe(s->output_lfe, n, s->lowcut, s->highcut, &lfe_mag, &mag_total, s->lfe_mode); c_mag = sqrtf(1.f - fabsf(x)) * ((y + 1.f) * .5f) * mag_total; l_mag = sqrtf(.5f * ( x + 1.f)) * ((y + 1.f) * .5f) * mag_total; @@ -598,7 +600,7 @@ static void upmix_5_1_back_surround(AVFilterContext *ctx, dstls = (float *)s->output->extended_data[4]; dstrs = (float *)s->output->extended_data[5]; - get_lfe(s->output_lfe, n, s->lowcut, s->highcut, &lfe_mag, &c_mag); + get_lfe(s->output_lfe, n, s->lowcut, s->highcut, &lfe_mag, &c_mag, s->lfe_mode); l_mag = sqrtf(.5f * ( x + 1.f)) * ((y + 1.f) * .5f) * mag_total; r_mag = sqrtf(.5f * (-x + 1.f)) * ((y + 1.f) * .5f) * mag_total; @@ -741,7 +743,7 @@ static void upmix_7_1(AVFilterContext *ctx, dstls = (float *)s->output->extended_data[6]; dstrs = (float *)s->output->extended_data[7]; - get_lfe(s->output_lfe, n, s->lowcut, s->highcut, &lfe_mag, &mag_total); + get_lfe(s->output_lfe, n, s->lowcut, s->highcut, &lfe_mag, &mag_total, s->lfe_mode); c_mag = sqrtf(1.f - fabsf(x)) * ((y + 1.f) * .5f) * mag_total; l_mag = sqrtf(.5f * ( x + 1.f)) * ((y + 1.f) * .5f) * mag_total; @@ -802,7 +804,7 @@ static void upmix_7_1_5_0_side(AVFilterContext *ctx, c_phase = atan2f(c_im, c_re); - get_lfe(s->output_lfe, n, s->lowcut, s->highcut, &lfe_mag, &mag_total); + get_lfe(s->output_lfe, n, s->lowcut, s->highcut, &lfe_mag, &mag_total, s->lfe_mode); fl_mag = sqrtf(.5f * (xl + 1.f)) * ((yl + 1.f) * .5f) * mag_totall; fr_mag = sqrtf(.5f * (xr + 1.f)) * ((yr + 1.f) * .5f) * mag_totalr; @@ -1462,6 +1464,9 @@ static const AVOption surround_options[] = { { "lfe", "output LFE", OFFSET(output_lfe), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS }, { "lfe_low", "LFE low cut off", OFFSET(lowcutf), AV_OPT_TYPE_INT, {.i64=128}, 0, 256, FLAGS }, { "lfe_high", "LFE high cut off", OFFSET(highcutf), AV_OPT_TYPE_INT, {.i64=256}, 0, 512, FLAGS }, + { "lfe_mode", "set LFE channel mode", OFFSET(lfe_mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "lfe_mode" }, + { "add", "just add LFE channel", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 1, FLAGS, "lfe_mode" }, + { "sub", "substract LFE channel with others", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 1, FLAGS, "lfe_mode" }, { "fc_in", "set front center channel input level", OFFSET(fc_in), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 10, FLAGS }, { "fc_out", "set front center channel output level", OFFSET(fc_out), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 10, FLAGS }, { "lfe_in", "set lfe channel input level", OFFSET(lfe_in), AV_OPT_TYPE_FLOAT, {.dbl=1}, 0, 10, FLAGS }, |