[FFmpeg-devel] [PATCH 1/3] avfilter/vf_pseudocolor: add presets
Paul B Mahol
onemda at gmail.com
Thu Jan 28 21:11:52 EET 2021
On Thu, Jan 28, 2021 at 4:08 PM Andreas Rheinhardt <
andreas.rheinhardt at gmail.com> wrote:
> 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},
> > + {0.996162, 0.798348, 0.559820}, {0.995932, 0.805527, 0.566202},
> > + {0.995680, 0.812706, 0.572645}, {0.995424, 0.819875, 0.579140},
> > + {0.995131, 0.827052, 0.585701}, {0.994851, 0.834213, 0.592307},
> > + {0.994524, 0.841387, 0.598983}, {0.994222, 0.848540, 0.605696},
> > + {0.993866, 0.855711, 0.612482}, {0.993545, 0.862859, 0.619299},
> > + {0.993170, 0.870024, 0.626189}, {0.992831, 0.877168, 0.633109},
> > + {0.992440, 0.884330, 0.640099}, {0.992089, 0.891470, 0.647116},
> > + {0.991688, 0.898627, 0.654202}, {0.991332, 0.905763, 0.661309},
> > + {0.990930, 0.912915, 0.668481}, {0.990570, 0.920049, 0.675675},
> > + {0.990175, 0.927196, 0.682926}, {0.989815, 0.934329, 0.690198},
> > + {0.989434, 0.941470, 0.697519}, {0.989077, 0.948604, 0.704863},
> > + {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},
> > + {0.081962, 0.043328, 0.215289}, {0.087411, 0.044556, 0.224813},
> > + {0.092990, 0.045583, 0.234358}, {0.098702, 0.046402, 0.243904},
> > + {0.104551, 0.047008, 0.253430}, {0.110536, 0.047399, 0.262912},
> > + {0.116656, 0.047574, 0.272321}, {0.122908, 0.047536, 0.281624},
> > + {0.129285, 0.047293, 0.290788}, {0.135778, 0.046856, 0.299776},
> > + {0.142378, 0.046242, 0.308553}, {0.149073, 0.045468, 0.317085},
> > + {0.155850, 0.044559, 0.325338}, {0.162689, 0.043554, 0.333277},
> > + {0.169575, 0.042489, 0.340874}, {0.176493, 0.041402, 0.348111},
> > + {0.183429, 0.040329, 0.354971}, {0.190367, 0.039309, 0.361447},
> > + {0.197297, 0.038400, 0.367535}, {0.204209, 0.037632, 0.373238},
> > + {0.211095, 0.037030, 0.378563}, {0.217949, 0.036615, 0.383522},
> > + {0.224763, 0.036405, 0.388129}, {0.231538, 0.036405, 0.392400},
> > + {0.238273, 0.036621, 0.396353}, {0.244967, 0.037055, 0.400007},
> > + {0.251620, 0.037705, 0.403378}, {0.258234, 0.038571, 0.406485},
> > + {0.264810, 0.039647, 0.409345}, {0.271347, 0.040922, 0.411976},
> > + {0.277850, 0.042353, 0.414392}, {0.284321, 0.043933, 0.416608},
> > + {0.290763, 0.045644, 0.418637}, {0.297178, 0.047470, 0.420491},
> > + {0.303568, 0.049396, 0.422182}, {0.309935, 0.051407, 0.423721},
> > + {0.316282, 0.053490, 0.425116}, {0.322610, 0.055634, 0.426377},
> > + {0.328921, 0.057827, 0.427511}, {0.335217, 0.060060, 0.428524},
> > + {0.341500, 0.062325, 0.429425}, {0.347771, 0.064616, 0.430217},
> > + {0.354032, 0.066925, 0.430906}, {0.360284, 0.069247, 0.431497},
> > + {0.366529, 0.071579, 0.431994}, {0.372768, 0.073915, 0.432400},
> > + {0.379001, 0.076253, 0.432719}, {0.385228, 0.078591, 0.432955},
> > + {0.391453, 0.080927, 0.433109}, {0.397674, 0.083257, 0.433183},
> > + {0.403894, 0.085580, 0.433179}, {0.410113, 0.087896, 0.433098},
> > + {0.416331, 0.090203, 0.432943}, {0.422549, 0.092501, 0.432714},
> > + {0.428768, 0.094790, 0.432412}, {0.434987, 0.097069, 0.432039},
> > + {0.441207, 0.099338, 0.431594}, {0.447428, 0.101597, 0.431080},
> > + {0.453651, 0.103848, 0.430498}, {0.459875, 0.106089, 0.429846},
> > + {0.466100, 0.108322, 0.429125}, {0.472328, 0.110547, 0.428334},
> > + {0.478558, 0.112764, 0.427475}, {0.484789, 0.114974, 0.426548},
> > + {0.491022, 0.117179, 0.425552}, {0.497257, 0.119379, 0.424488},
> > + {0.503493, 0.121575, 0.423356}, {0.509730, 0.123769, 0.422156},
> > + {0.515967, 0.125960, 0.420887}, {0.522206, 0.128150, 0.419549},
> > + {0.528444, 0.130341, 0.418142}, {0.534683, 0.132534, 0.416667},
> > + {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},
> > + {0.590734, 0.152563, 0.400290}, {0.596940, 0.154848, 0.398125},
> > + {0.603139, 0.157151, 0.395891}, {0.609330, 0.159474, 0.393589},
> > + {0.615513, 0.161817, 0.391219}, {0.621685, 0.164184, 0.388781},
> > + {0.627847, 0.166575, 0.386276}, {0.633998, 0.168992, 0.383704},
> > + {0.640135, 0.171438, 0.381065}, {0.646260, 0.173914, 0.378359},
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> > + {0.92004, 0.82806, 0.22456},{0.92666, 0.82025, 0.22570},
> > + {0.93301, 0.81236, 0.22667},{0.93909, 0.80439, 0.22744},
> > + {0.94489, 0.79634, 0.22800},{0.95039, 0.78823, 0.22831},
> > + {0.95560, 0.78005, 0.22836},{0.96049, 0.77181, 0.22811},
> > + {0.96507, 0.76352, 0.22754},{0.96931, 0.75519, 0.22663},
> > + {0.97323, 0.74682, 0.22536},{0.97679, 0.73842, 0.22369},
> > + {0.98000, 0.73000, 0.22161},{0.98289, 0.72140, 0.21918},
> > + {0.98549, 0.71250, 0.21650},{0.98781, 0.70330, 0.21358},
> > + {0.98986, 0.69382, 0.21043},{0.99163, 0.68408, 0.20706},
> > + {0.99314, 0.67408, 0.20348},{0.99438, 0.66386, 0.19971},
> > + {0.99535, 0.65341, 0.19577},{0.99607, 0.64277, 0.19165},
> > + {0.99654, 0.63193, 0.18738},{0.99675, 0.62093, 0.18297},
> > + {0.99672, 0.60977, 0.17842},{0.99644, 0.59846, 0.17376},
> > + {0.99593, 0.58703, 0.16899},{0.99517, 0.57549, 0.16412},
> > + {0.99419, 0.56386, 0.15918},{0.99297, 0.55214, 0.15417},
> > + {0.99153, 0.54036, 0.14910},{0.98987, 0.52854, 0.14398},
> > + {0.98799, 0.51667, 0.13883},{0.98590, 0.50479, 0.13367},
> > + {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?
>
Not that important as that code is executed rarely and only max 65536 times
called or 256 for 8-bit depth.
Also I disliked big tables so I switched on using polynomials.
>
> > + 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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