[FFmpeg-devel] [PATCH 1/3] avfilter/vf_pseudocolor: add presets
Andreas Rheinhardt
andreas.rheinhardt at gmail.com
Thu Jan 28 17:01:56 EET 2021
Paul B Mahol:
> Signed-off-by: Paul B Mahol <onemda at gmail.com>
> ---
> doc/filters.texi | 13 +
> libavfilter/vf_pseudocolor.c | 735 ++++++++++++++++++++++++++++++++++-
> 2 files changed, 746 insertions(+), 2 deletions(-)
>
> diff --git a/doc/filters.texi b/doc/filters.texi
> index 52458c116d..31577d7ddf 100644
> --- a/doc/filters.texi
> +++ b/doc/filters.texi
> @@ -16212,6 +16212,19 @@ set pixel fourth component expression, corresponds to the alpha component
>
> @item i
> set component to use as base for altering colors
> +
> + at item p
> +Pick one of built-in LUTs. By default is set to none.
> +
> +Available LUTs:
> + at table @samp
> + at item magma
> + at item inferno
> + at item plasma
> + at item viridis
> + at item turbo
> + at end table
> +
> @end table
>
> Each of them specifies the expression to use for computing the lookup table for
> diff --git a/libavfilter/vf_pseudocolor.c b/libavfilter/vf_pseudocolor.c
> index 4c24f49bd9..655b2a5111 100644
> --- a/libavfilter/vf_pseudocolor.c
> +++ b/libavfilter/vf_pseudocolor.c
> @@ -59,8 +59,663 @@ enum var_name {
> VAR_VARS_NB
> };
>
> +static const float presets[][256][3] =
> +{
> + {
> + {0.001462, 0.000466, 0.013866}, {0.002258, 0.001295, 0.018331},
> + {0.003279, 0.002305, 0.023708}, {0.004512, 0.003490, 0.029965},
> + {0.005950, 0.004843, 0.037130}, {0.007588, 0.006356, 0.044973},
> + {0.009426, 0.008022, 0.052844}, {0.011465, 0.009828, 0.060750},
> + {0.013708, 0.011771, 0.068667}, {0.016156, 0.013840, 0.076603},
> + {0.018815, 0.016026, 0.084584}, {0.021692, 0.018320, 0.092610},
> + {0.024792, 0.020715, 0.100676}, {0.028123, 0.023201, 0.108787},
> + {0.031696, 0.025765, 0.116965}, {0.035520, 0.028397, 0.125209},
> + {0.039608, 0.031090, 0.133515}, {0.043830, 0.033830, 0.141886},
> + {0.048062, 0.036607, 0.150327}, {0.052320, 0.039407, 0.158841},
> + {0.056615, 0.042160, 0.167446}, {0.060949, 0.044794, 0.176129},
> + {0.065330, 0.047318, 0.184892}, {0.069764, 0.049726, 0.193735},
> + {0.074257, 0.052017, 0.202660}, {0.078815, 0.054184, 0.211667},
> + {0.083446, 0.056225, 0.220755}, {0.088155, 0.058133, 0.229922},
> + {0.092949, 0.059904, 0.239164}, {0.097833, 0.061531, 0.248477},
> + {0.102815, 0.063010, 0.257854}, {0.107899, 0.064335, 0.267289},
> + {0.113094, 0.065492, 0.276784}, {0.118405, 0.066479, 0.286321},
> + {0.123833, 0.067295, 0.295879}, {0.129380, 0.067935, 0.305443},
> + {0.135053, 0.068391, 0.315000}, {0.140858, 0.068654, 0.324538},
> + {0.146785, 0.068738, 0.334011}, {0.152839, 0.068637, 0.343404},
> + {0.159018, 0.068354, 0.352688}, {0.165308, 0.067911, 0.361816},
> + {0.171713, 0.067305, 0.370771}, {0.178212, 0.066576, 0.379497},
> + {0.184801, 0.065732, 0.387973}, {0.191460, 0.064818, 0.396152},
> + {0.198177, 0.063862, 0.404009}, {0.204935, 0.062907, 0.411514},
> + {0.211718, 0.061992, 0.418647}, {0.218512, 0.061158, 0.425392},
> + {0.225302, 0.060445, 0.431742}, {0.232077, 0.059889, 0.437695},
> + {0.238826, 0.059517, 0.443256}, {0.245543, 0.059352, 0.448436},
> + {0.252220, 0.059415, 0.453248}, {0.258857, 0.059706, 0.457710},
> + {0.265447, 0.060237, 0.461840}, {0.271994, 0.060994, 0.465660},
> + {0.278493, 0.061978, 0.469190}, {0.284951, 0.063168, 0.472451},
> + {0.291366, 0.064553, 0.475462}, {0.297740, 0.066117, 0.478243},
> + {0.304081, 0.067835, 0.480812}, {0.310382, 0.069702, 0.483186},
> + {0.316654, 0.071690, 0.485380}, {0.322899, 0.073782, 0.487408},
> + {0.329114, 0.075972, 0.489287}, {0.335308, 0.078236, 0.491024},
> + {0.341482, 0.080564, 0.492631}, {0.347636, 0.082946, 0.494121},
> + {0.353773, 0.085373, 0.495501}, {0.359898, 0.087831, 0.496778},
> + {0.366012, 0.090314, 0.497960}, {0.372116, 0.092816, 0.499053},
> + {0.378211, 0.095332, 0.500067}, {0.384299, 0.097855, 0.501002},
> + {0.390384, 0.100379, 0.501864}, {0.396467, 0.102902, 0.502658},
> + {0.402548, 0.105420, 0.503386}, {0.408629, 0.107930, 0.504052},
> + {0.414709, 0.110431, 0.504662}, {0.420791, 0.112920, 0.505215},
> + {0.426877, 0.115395, 0.505714}, {0.432967, 0.117855, 0.506160},
> + {0.439062, 0.120298, 0.506555}, {0.445163, 0.122724, 0.506901},
> + {0.451271, 0.125132, 0.507198}, {0.457386, 0.127522, 0.507448},
> + {0.463508, 0.129893, 0.507652}, {0.469640, 0.132245, 0.507809},
> + {0.475780, 0.134577, 0.507921}, {0.481929, 0.136891, 0.507989},
> + {0.488088, 0.139186, 0.508011}, {0.494258, 0.141462, 0.507988},
> + {0.500438, 0.143719, 0.507920}, {0.506629, 0.145958, 0.507806},
> + {0.512831, 0.148179, 0.507648}, {0.519045, 0.150383, 0.507443},
> + {0.525270, 0.152569, 0.507192}, {0.531507, 0.154739, 0.506895},
> + {0.537755, 0.156894, 0.506551}, {0.544015, 0.159033, 0.506159},
> + {0.550287, 0.161158, 0.505719}, {0.556571, 0.163269, 0.505230},
> + {0.562866, 0.165368, 0.504692}, {0.569172, 0.167454, 0.504105},
> + {0.575490, 0.169530, 0.503466}, {0.581819, 0.171596, 0.502777},
> + {0.588158, 0.173652, 0.502035}, {0.594508, 0.175701, 0.501241},
> + {0.600868, 0.177743, 0.500394}, {0.607238, 0.179779, 0.499492},
> + {0.613617, 0.181811, 0.498536}, {0.620005, 0.183840, 0.497524},
> + {0.626401, 0.185867, 0.496456}, {0.632805, 0.187893, 0.495332},
> + {0.639216, 0.189921, 0.494150}, {0.645633, 0.191952, 0.492910},
> + {0.652056, 0.193986, 0.491611}, {0.658483, 0.196027, 0.490253},
> + {0.664915, 0.198075, 0.488836}, {0.671349, 0.200133, 0.487358},
> + {0.677786, 0.202203, 0.485819}, {0.684224, 0.204286, 0.484219},
> + {0.690661, 0.206384, 0.482558}, {0.697098, 0.208501, 0.480835},
> + {0.703532, 0.210638, 0.479049}, {0.709962, 0.212797, 0.477201},
> + {0.716387, 0.214982, 0.475290}, {0.722805, 0.217194, 0.473316},
> + {0.729216, 0.219437, 0.471279}, {0.735616, 0.221713, 0.469180},
> + {0.742004, 0.224025, 0.467018}, {0.748378, 0.226377, 0.464794},
> + {0.754737, 0.228772, 0.462509}, {0.761077, 0.231214, 0.460162},
> + {0.767398, 0.233705, 0.457755}, {0.773695, 0.236249, 0.455289},
> + {0.779968, 0.238851, 0.452765}, {0.786212, 0.241514, 0.450184},
> + {0.792427, 0.244242, 0.447543}, {0.798608, 0.247040, 0.444848},
> + {0.804752, 0.249911, 0.442102}, {0.810855, 0.252861, 0.439305},
> + {0.816914, 0.255895, 0.436461}, {0.822926, 0.259016, 0.433573},
> + {0.828886, 0.262229, 0.430644}, {0.834791, 0.265540, 0.427671},
> + {0.840636, 0.268953, 0.424666}, {0.846416, 0.272473, 0.421631},
> + {0.852126, 0.276106, 0.418573}, {0.857763, 0.279857, 0.415496},
> + {0.863320, 0.283729, 0.412403}, {0.868793, 0.287728, 0.409303},
> + {0.874176, 0.291859, 0.406205}, {0.879464, 0.296125, 0.403118},
> + {0.884651, 0.300530, 0.400047}, {0.889731, 0.305079, 0.397002},
> + {0.894700, 0.309773, 0.393995}, {0.899552, 0.314616, 0.391037},
> + {0.904281, 0.319610, 0.388137}, {0.908884, 0.324755, 0.385308},
> + {0.913354, 0.330052, 0.382563}, {0.917689, 0.335500, 0.379915},
> + {0.921884, 0.341098, 0.377376}, {0.925937, 0.346844, 0.374959},
> + {0.929845, 0.352734, 0.372677}, {0.933606, 0.358764, 0.370541},
> + {0.937221, 0.364929, 0.368567}, {0.940687, 0.371224, 0.366762},
> + {0.944006, 0.377643, 0.365136}, {0.947180, 0.384178, 0.363701},
> + {0.950210, 0.390820, 0.362468}, {0.953099, 0.397563, 0.361438},
> + {0.955849, 0.404400, 0.360619}, {0.958464, 0.411324, 0.360014},
> + {0.960949, 0.418323, 0.359630}, {0.963310, 0.425390, 0.359469},
> + {0.965549, 0.432519, 0.359529}, {0.967671, 0.439703, 0.359810},
> + {0.969680, 0.446936, 0.360311}, {0.971582, 0.454210, 0.361030},
> + {0.973381, 0.461520, 0.361965}, {0.975082, 0.468861, 0.363111},
> + {0.976690, 0.476226, 0.364466}, {0.978210, 0.483612, 0.366025},
> + {0.979645, 0.491014, 0.367783}, {0.981000, 0.498428, 0.369734},
> + {0.982279, 0.505851, 0.371874}, {0.983485, 0.513280, 0.374198},
> + {0.984622, 0.520713, 0.376698}, {0.985693, 0.528148, 0.379371},
> + {0.986700, 0.535582, 0.382210}, {0.987646, 0.543015, 0.385210},
> + {0.988533, 0.550446, 0.388365}, {0.989363, 0.557873, 0.391671},
> + {0.990138, 0.565296, 0.395122}, {0.990871, 0.572706, 0.398714},
> + {0.991558, 0.580107, 0.402441}, {0.992196, 0.587502, 0.406299},
> + {0.992785, 0.594891, 0.410283}, {0.993326, 0.602275, 0.414390},
> + {0.993834, 0.609644, 0.418613}, {0.994309, 0.616999, 0.422950},
> + {0.994738, 0.624350, 0.427397}, {0.995122, 0.631696, 0.431951},
> + {0.995480, 0.639027, 0.436607}, {0.995810, 0.646344, 0.441361},
> + {0.996096, 0.653659, 0.446213}, {0.996341, 0.660969, 0.451160},
> + {0.996580, 0.668256, 0.456192}, {0.996775, 0.675541, 0.461314},
> + {0.996925, 0.682828, 0.466526}, {0.997077, 0.690088, 0.471811},
> + {0.997186, 0.697349, 0.477182}, {0.997254, 0.704611, 0.482635},
> + {0.997325, 0.711848, 0.488154}, {0.997351, 0.719089, 0.493755},
> + {0.997351, 0.726324, 0.499428}, {0.997341, 0.733545, 0.505167},
> + {0.997285, 0.740772, 0.510983}, {0.997228, 0.747981, 0.516859},
> + {0.997138, 0.755190, 0.522806}, {0.997019, 0.762398, 0.528821},
> + {0.996898, 0.769591, 0.534892}, {0.996727, 0.776795, 0.541039},
> + {0.996571, 0.783977, 0.547233}, {0.996369, 0.791167, 0.553499},
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> + {0.988717, 0.955742, 0.712242}, {0.988367, 0.962878, 0.719649},
> + {0.988033, 0.970012, 0.727077}, {0.987691, 0.977154, 0.734536},
> + {0.987387, 0.984288, 0.742002}, {0.987053, 0.991438, 0.749504},
> + },
> + {
> + {0.001462, 0.000466, 0.013866}, {0.002267, 0.001270, 0.018570},
> + {0.003299, 0.002249, 0.024239}, {0.004547, 0.003392, 0.030909},
> + {0.006006, 0.004692, 0.038558}, {0.007676, 0.006136, 0.046836},
> + {0.009561, 0.007713, 0.055143}, {0.011663, 0.009417, 0.063460},
> + {0.013995, 0.011225, 0.071862}, {0.016561, 0.013136, 0.080282},
> + {0.019373, 0.015133, 0.088767}, {0.022447, 0.017199, 0.097327},
> + {0.025793, 0.019331, 0.105930}, {0.029432, 0.021503, 0.114621},
> + {0.033385, 0.023702, 0.123397}, {0.037668, 0.025921, 0.132232},
> + {0.042253, 0.028139, 0.141141}, {0.046915, 0.030324, 0.150164},
> + {0.051644, 0.032474, 0.159254}, {0.056449, 0.034569, 0.168414},
> + {0.061340, 0.036590, 0.177642}, {0.066331, 0.038504, 0.186962},
> + {0.071429, 0.040294, 0.196354}, {0.076637, 0.041905, 0.205799},
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> + {0.540920, 0.134729, 0.415123}, {0.547157, 0.136929, 0.413511},
> + {0.553392, 0.139134, 0.411829}, {0.559624, 0.141346, 0.410078},
> + {0.565854, 0.143567, 0.408258}, {0.572081, 0.145797, 0.406369},
> + {0.578304, 0.148039, 0.404411}, {0.584521, 0.150294, 0.402385},
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> + {0.603139, 0.157151, 0.395891}, {0.609330, 0.159474, 0.393589},
> + {0.615513, 0.161817, 0.391219}, {0.621685, 0.164184, 0.388781},
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> + {0.664540, 0.181539, 0.369846}, {0.670599, 0.184153, 0.366879},
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> + {0.700576, 0.197851, 0.351113}, {0.706500, 0.200728, 0.347777},
> + {0.712396, 0.203656, 0.344383}, {0.718264, 0.206636, 0.340931},
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> + {0.98360, 0.49291, 0.12849},{0.98108, 0.48104, 0.12332},
> + {0.97837, 0.46920, 0.11817},{0.97545, 0.45740, 0.11305},
> + {0.97234, 0.44565, 0.10797},{0.96904, 0.43399, 0.10294},
> + {0.96555, 0.42241, 0.09798},{0.96187, 0.41093, 0.09310},
> + {0.95801, 0.39958, 0.08831},{0.95398, 0.38836, 0.08362},
> + {0.94977, 0.37729, 0.07905},{0.94538, 0.36638, 0.07461},
> + {0.94084, 0.35566, 0.07031},{0.93612, 0.34513, 0.06616},
> + {0.93125, 0.33482, 0.06218},{0.92623, 0.32473, 0.05837},
> + {0.92105, 0.31489, 0.05475},{0.91572, 0.30530, 0.05134},
> + {0.91024, 0.29599, 0.04814},{0.90463, 0.28696, 0.04516},
> + {0.89888, 0.27824, 0.04243},{0.89298, 0.26981, 0.03993},
> + {0.88691, 0.26152, 0.03753},{0.88066, 0.25334, 0.03521},
> + {0.87422, 0.24526, 0.03297},{0.86760, 0.23730, 0.03082},
> + {0.86079, 0.22945, 0.02875},{0.85380, 0.22170, 0.02677},
> + {0.84662, 0.21407, 0.02487},{0.83926, 0.20654, 0.02305},
> + {0.83172, 0.19912, 0.02131},{0.82399, 0.19182, 0.01966},
> + {0.81608, 0.18462, 0.01809},{0.80799, 0.17753, 0.01660},
> + {0.79971, 0.17055, 0.01520},{0.79125, 0.16368, 0.01387},
> + {0.78260, 0.15693, 0.01264},{0.77377, 0.15028, 0.01148},
> + {0.76476, 0.14374, 0.01041},{0.75556, 0.13731, 0.00942},
> + {0.74617, 0.13098, 0.00851},{0.73661, 0.12477, 0.00769},
> + {0.72686, 0.11867, 0.00695},{0.71692, 0.11268, 0.00629},
> + {0.70680, 0.10680, 0.00571},{0.69650, 0.10102, 0.00522},
> + {0.68602, 0.09536, 0.00481},{0.67535, 0.08980, 0.00449},
> + {0.66449, 0.08436, 0.00424},{0.65345, 0.07902, 0.00408},
> + {0.64223, 0.07380, 0.00401},{0.63082, 0.06868, 0.00401},
> + {0.61923, 0.06367, 0.00410},{0.60746, 0.05878, 0.00427},
> + {0.59550, 0.05399, 0.00453},{0.58336, 0.04931, 0.00486},
> + {0.57103, 0.04474, 0.00529},{0.55852, 0.04028, 0.00579},
> + {0.54583, 0.03593, 0.00638},{0.53295, 0.03169, 0.00705},
> + {0.51989, 0.02756, 0.00780},{0.50664, 0.02354, 0.00863},
> + {0.49321, 0.01963, 0.00955},{0.47960, 0.01583, 0.01055}
> + },
> +};
> +
> typedef struct PseudoColorContext {
> const AVClass *class;
> + int preset;
> int max;
> int index;
> int nb_planes;
> @@ -90,6 +745,13 @@ static const AVOption pseudocolor_options[] = {
> { "c2", "set component #2 expression", OFFSET(comp_expr_str[2]), AV_OPT_TYPE_STRING, {.str="val"}, .flags = FLAGS },
> { "c3", "set component #3 expression", OFFSET(comp_expr_str[3]), AV_OPT_TYPE_STRING, {.str="val"}, .flags = FLAGS },
> { "i", "set component as base", OFFSET(index), AV_OPT_TYPE_INT, {.i64=0}, 0, 3, .flags = FLAGS },
> + { "p", "set preset", OFFSET(preset), AV_OPT_TYPE_INT, {.i64=-1},-1,4, .flags = FLAGS, "preset" },
> + { "none", NULL, 0, AV_OPT_TYPE_CONST, {.i64=-1},.flags = FLAGS, "preset" },
> + { "magma", NULL, 0, AV_OPT_TYPE_CONST, {.i64=0}, .flags = FLAGS, "preset" },
> + { "inferno", NULL, 0, AV_OPT_TYPE_CONST, {.i64=1}, .flags = FLAGS, "preset" },
> + { "plasma", NULL, 0, AV_OPT_TYPE_CONST, {.i64=2}, .flags = FLAGS, "preset" },
> + { "viridis", NULL, 0, AV_OPT_TYPE_CONST, {.i64=3}, .flags = FLAGS, "preset" },
> + { "turbo", NULL, 0, AV_OPT_TYPE_CONST, {.i64=4}, .flags = FLAGS, "preset" },
> { NULL }
> };
>
> @@ -419,14 +1081,33 @@ static void pseudocolor_filter_16_11d(int max, int width, int height,
> }
> }
>
> +#define RGB_TO_Y_BT709(r, g, b) \
> +((0.21260*219.0/255.0) * (r) + (0.71520*219.0/255.0) * (g) + \
> + (0.07220*219.0/255.0) * (b))
> +
> +#define RGB_TO_U_BT709(r1, g1, b1, max) \
> +(-(0.11457*224.0/255.0) * r1 - (0.38543*224.0/255.0) * g1 + \
> + (0.50000*224.0/255.0) * b1 + max * 0.5)
> +
> +#define RGB_TO_V_BT709(r1, g1, b1, max) \
> +((0.50000*224.0/255.0) * r1 - (0.45415*224.0/255.0) * g1 - \
> + (0.04585*224.0/255.0) * b1 + max * 0.5)
> +
> +static float lerpf(float v0, float v1, float f)
> +{
> + return v0 + (v1 - v0) * f;
> +}
> +
> static int config_input(AVFilterLink *inlink)
> {
> AVFilterContext *ctx = inlink->dst;
> PseudoColorContext *s = ctx->priv;
> const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
> - int depth, ret, hsub, vsub, color;
> + int depth, ret, hsub, vsub, color, factor, rgb;
>
> + rgb = desc->flags & AV_PIX_FMT_FLAG_RGB;
> depth = desc->comp[0].depth;
> + factor = 1 << (depth - 8);
> s->max = (1 << depth) - 1;
> s->nb_planes = av_pix_fmt_count_planes(inlink->format);
>
> @@ -457,7 +1138,7 @@ static int config_input(AVFilterLink *inlink)
> s->var_values[VAR_VMAX] = 240 * (1 << (depth - 8));
> s->var_values[VAR_AMAX] = s->max;
>
> - for (color = 0; color < s->nb_planes; color++) {
> + for (color = 0; color < s->nb_planes && s->preset < 0; color++) {
> double res;
> int val;
>
> @@ -488,6 +1169,56 @@ static int config_input(AVFilterLink *inlink)
> }
> }
>
> + if (s->preset >= 0) {
> + for (int i = 0; i < 255; i++) {
> + for (int j = 0; j < factor; j++) {
> + const float lf = j / (float)factor;
> + int r, g, b;
> +
> + g = lerpf(presets[s->preset][i][1], presets[s->preset][i+1][1], lf) * s->max;
> + b = lerpf(presets[s->preset][i][2], presets[s->preset][i+1][2], lf) * s->max;
> + r = lerpf(presets[s->preset][i][0], presets[s->preset][i+1][0], lf) * s->max;
> +
Have you tested whether it would improve performance to directly use a
pointer to the used table?
> + if (!rgb) {
> + int y = RGB_TO_Y_BT709(r, g, b);
> + int u = RGB_TO_U_BT709(r, g, b, s->max);
> + int v = RGB_TO_V_BT709(r, g, b, s->max);
> +
> + r = v;
> + g = y;
> + b = u;
> + }
> +
> + s->lut[0][i*factor+j] = g;
> + s->lut[1][i*factor+j] = b;
> + s->lut[2][i*factor+j] = r;
> + }
> + }
> +
> + for (int j = 0; j < factor; j++) {
> + const float lf = j / (float)factor;
> + int r, g, b;
> +
> + g = lerpf(presets[s->preset][254][1], presets[s->preset][255][1], lf) * s->max;
> + b = lerpf(presets[s->preset][254][2], presets[s->preset][255][2], lf) * s->max;
> + r = lerpf(presets[s->preset][254][0], presets[s->preset][255][0], lf) * s->max;
> +
> + if (!rgb) {
> + int y = RGB_TO_Y_BT709(r, g, b);
> + int u = RGB_TO_U_BT709(r, g, b, s->max);
> + int v = RGB_TO_V_BT709(r, g, b, s->max);
> +
> + r = v;
> + g = y;
> + b = u;
> + }
> +
> + s->lut[0][255*factor+j] = g;
> + s->lut[1][255*factor+j] = b;
> + s->lut[2][255*factor+j] = r;
> + }
> + }
> +
> switch (inlink->format) {
> case AV_PIX_FMT_YUV444P:
> case AV_PIX_FMT_YUVA444P:
>
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