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lavu: add support for Panasonic V-Log

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This commit is contained in:
Lynne
2025-10-28 11:48:08 +01:00
parent 08c94518c9
commit aeb9b19ebc
9 changed files with 126 additions and 22 deletions
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3
libavcodec/fflcms2.c
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@@ -50,7 +50,7 @@ void ff_icc_context_uninit(FFIccContext *s)
static int get_curve(FFIccContext *s, enum AVColorTransferCharacteristic trc,
cmsToneCurve **out_curve)
{
if (trc >= AVCOL_TRC_NB)
if ((trc >= AVCOL_TRC_NB && trc < AVCOL_TRC_EXT_BASE) || trc >= AVCOL_TRC_EXT_NB)
return AVERROR_INVALIDDATA;
if (s->curves[trc])
@@ -128,6 +128,7 @@ static int get_curve(FFIccContext *s, enum AVColorTransferCharacteristic trc,
case AVCOL_TRC_BT1361_ECG:
case AVCOL_TRC_SMPTE2084:
case AVCOL_TRC_ARIB_STD_B67:
case AVCOL_TRC_V_LOG:
return AVERROR_PATCHWELCOME;
default:

1
libavfilter/vf_libplacebo.c
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@@ -1682,6 +1682,7 @@ static const AVOption libplacebo_options[] = {
{"bt2020-12", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_BT2020_12}, INT_MIN, INT_MAX, STATIC, .unit = "color_trc"},
{"smpte2084", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_SMPTE2084}, INT_MIN, INT_MAX, STATIC, .unit = "color_trc"},
{"arib-std-b67", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_ARIB_STD_B67}, INT_MIN, INT_MAX, STATIC, .unit = "color_trc"},
{"vlog", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_V_LOG}, INT_MIN, INT_MAX, STATIC, .unit = "color_trc"},
{"rotate", "rotate the input clockwise", OFFSET(rotation), AV_OPT_TYPE_INT, {.i64=PL_ROTATION_0}, PL_ROTATION_0, PL_ROTATION_360, DYNAMIC, .unit = "rotation"},
{"0", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PL_ROTATION_0}, .flags = STATIC, .unit = "rotation"},

3
libavfilter/vf_setparams.c
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@@ -82,7 +82,7 @@ static const AVOption setparams_options[] = {
{"jedec-p22", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_JEDEC_P22}, 0, 0, FLAGS, .unit = "color_primaries"},
{"ebu3213", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_PRI_EBU3213}, 0, 0, FLAGS, .unit = "color_primaries"},
{"color_trc", "select color transfer", OFFSET(color_trc), AV_OPT_TYPE_INT, {.i64=-1}, -1, AVCOL_TRC_NB-1, FLAGS, .unit = "color_trc"},
{"color_trc", "select color transfer", OFFSET(color_trc), AV_OPT_TYPE_INT, {.i64=-1}, -1, AVCOL_TRC_EXT_NB-1, FLAGS, .unit = "color_trc"},
{"auto", "keep the same color transfer", 0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, FLAGS, .unit = "color_trc"},
{"bt709", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_BT709}, 0, 0, FLAGS, .unit = "color_trc"},
{"unknown", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_UNSPECIFIED}, 0, 0, FLAGS, .unit = "color_trc"},
@@ -101,6 +101,7 @@ static const AVOption setparams_options[] = {
{"smpte2084", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_SMPTE2084}, 0, 0, FLAGS, .unit = "color_trc"},
{"smpte428", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_SMPTE428}, 0, 0, FLAGS, .unit = "color_trc"},
{"arib-std-b67", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_ARIB_STD_B67}, 0, 0, FLAGS, .unit = "color_trc"},
{"vlog", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_TRC_V_LOG}, 0, 0, FLAGS, .unit = "color_trc"},
{"colorspace", "select colorspace", OFFSET(colorspace), AV_OPT_TYPE_INT, {.i64=-1}, -1, AVCOL_SPC_NB-1, FLAGS, .unit = "colorspace"},
{"auto", "keep the same colorspace", 0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, FLAGS, .unit = "colorspace"},

83
libavutil/csp.c
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@@ -146,14 +146,17 @@ static const double approximate_gamma[AVCOL_TRC_NB] = {
[AVCOL_TRC_SMPTE428] = 2.6,
};
static const double approximate_gamma_ext[AVCOL_TRC_EXT_NB -
AVCOL_TRC_EXT_BASE] = {
[AVCOL_TRC_V_LOG - AVCOL_TRC_EXT_BASE] = 2.2,
};
double av_csp_approximate_trc_gamma(enum AVColorTransferCharacteristic trc)
{
double gamma;
if ((unsigned)trc >= AVCOL_TRC_NB)
return 0.0;
gamma = approximate_gamma[trc];
if (gamma > 0)
return gamma;
if (trc < AVCOL_TRC_NB)
return approximate_gamma[trc];
else if ((trc >= AVCOL_TRC_EXT_BASE) && (trc < AVCOL_TRC_EXT_NB))
return approximate_gamma_ext[trc - AVCOL_TRC_EXT_BASE];
return 0.0;
}
@@ -171,11 +174,19 @@ static const double approximate_eotf_gamma[AVCOL_TRC_NB] = {
[AVCOL_TRC_SMPTE428] = 2.6,
};
static const double approximate_eotf_gamma_ext[AVCOL_TRC_EXT_NB -
AVCOL_TRC_EXT_BASE] = {
[AVCOL_TRC_V_LOG - AVCOL_TRC_EXT_BASE] = 2.2,
};
double av_csp_approximate_eotf_gamma(enum AVColorTransferCharacteristic trc)
{
if ((unsigned)trc >= AVCOL_TRC_NB)
return 0.0;
return approximate_eotf_gamma[trc];
if ((unsigned)trc < AVCOL_TRC_NB)
return approximate_eotf_gamma[trc];
else if (((unsigned)trc >= AVCOL_TRC_EXT_BASE) &&
((unsigned)trc < AVCOL_TRC_EXT_NB))
return approximate_eotf_gamma_ext[trc - AVCOL_TRC_EXT_BASE];
return 0.0;
}
#define BT709_alpha 1.099296826809442
@@ -399,6 +410,32 @@ static double trc_arib_std_b67_inv(double E)
(E <= 0.5 ? E * E / 3.0 : (exp((E - c) / a) + b) / 12.0);
}
#define VLOG_c1 0.01
#define VLOG_c2 0.181
#define VLOG_b 0.00873
#define VLOG_c 0.241514
#define VLOG_d 0.598206
static double trc_v_log(double E)
{
const double c1 = VLOG_c1;
const double b = VLOG_b;
const double c = VLOG_c;
const double d = VLOG_d;
return (E < c1) ? (5.6 * E + 0.125) :
(c * log10(E + b) + d);
}
static double trc_v_log_inv(double E)
{
const double c2 = VLOG_c2;
const double b = VLOG_b;
const double c = VLOG_c;
const double d = VLOG_d;
return (E < c2) ? (E - 0.125) / 5.6 :
(pow(10.0, ((E - d) / c)) - b);
}
static const av_csp_trc_function trc_funcs[AVCOL_TRC_NB] = {
[AVCOL_TRC_BT709] = trc_bt709,
[AVCOL_TRC_GAMMA22] = trc_gamma22,
@@ -418,11 +455,19 @@ static const av_csp_trc_function trc_funcs[AVCOL_TRC_NB] = {
[AVCOL_TRC_ARIB_STD_B67] = trc_arib_std_b67,
};
static const av_csp_trc_function trc_funcs_ext[AVCOL_TRC_EXT_NB -
AVCOL_TRC_EXT_BASE] = {
[AVCOL_TRC_V_LOG - AVCOL_TRC_EXT_BASE] = trc_v_log,
};
av_csp_trc_function av_csp_trc_func_from_id(enum AVColorTransferCharacteristic trc)
{
if ((unsigned)trc >= AVCOL_TRC_NB)
return NULL;
return trc_funcs[trc];
if ((unsigned)trc < AVCOL_TRC_NB)
return trc_funcs[trc];
else if (((unsigned)trc >= AVCOL_TRC_EXT_BASE) &&
((unsigned)trc < AVCOL_TRC_EXT_NB))
return trc_funcs_ext[trc - AVCOL_TRC_EXT_BASE];
return NULL;
}
static const av_csp_trc_function trc_inv_funcs[AVCOL_TRC_NB] = {
@@ -444,11 +489,19 @@ static const av_csp_trc_function trc_inv_funcs[AVCOL_TRC_NB] = {
[AVCOL_TRC_ARIB_STD_B67] = trc_arib_std_b67_inv,
};
static const av_csp_trc_function trc_inv_funcs_ext[AVCOL_TRC_EXT_NB -
AVCOL_TRC_EXT_BASE] = {
[AVCOL_TRC_V_LOG - AVCOL_TRC_EXT_BASE] = trc_v_log_inv,
};
av_csp_trc_function av_csp_trc_func_inv_from_id(enum AVColorTransferCharacteristic trc)
{
if ((unsigned)trc >= AVCOL_TRC_NB)
return NULL;
return trc_inv_funcs[trc];
if ((unsigned)trc < AVCOL_TRC_NB)
return trc_inv_funcs[trc];
else if (((unsigned)trc >= AVCOL_TRC_EXT_BASE) &&
((unsigned)trc < AVCOL_TRC_EXT_NB))
return trc_inv_funcs_ext[trc - AVCOL_TRC_EXT_BASE];
return NULL;
}
static void eotf_linear(const double Lw, const double Lb, double E[3])

20
libavutil/pixdesc.c
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@@ -3452,6 +3452,10 @@ static const char * const color_transfer_names[] = {
[AVCOL_TRC_ARIB_STD_B67] = "arib-std-b67",
};
static const char * const color_transfer_names_ext[] = {
[AVCOL_TRC_V_LOG - AVCOL_TRC_EXT_BASE] = "vlog",
};
static const char * const color_space_names[] = {
[AVCOL_SPC_RGB] = "gbr",
[AVCOL_SPC_BT709] = "bt709",
@@ -3939,8 +3943,12 @@ int av_color_primaries_from_name(const char *name)
const char *av_color_transfer_name(enum AVColorTransferCharacteristic transfer)
{
return (unsigned) transfer < AVCOL_TRC_NB ?
color_transfer_names[transfer] : NULL;
if ((unsigned)transfer < AVCOL_TRC_NB)
return color_transfer_names[transfer];
else if (((unsigned)transfer >= AVCOL_TRC_EXT_BASE) &&
((unsigned)transfer < AVCOL_TRC_EXT_NB))
return color_transfer_names_ext[transfer - AVCOL_TRC_EXT_BASE];
return NULL;
}
int av_color_transfer_from_name(const char *name)
@@ -3955,6 +3963,14 @@ int av_color_transfer_from_name(const char *name)
return i;
}
for (i = 0; i < FF_ARRAY_ELEMS(color_transfer_names_ext); i++) {
if (!color_transfer_names_ext[i])
continue;
if (av_strstart(name, color_transfer_names_ext[i], NULL))
return AVCOL_TRC_EXT_BASE + i;
}
return AVERROR(EINVAL);
}

7
libavutil/pixfmt.h
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@@ -699,7 +699,12 @@ enum AVColorTransferCharacteristic {
AVCOL_TRC_SMPTE428 = 17, ///< SMPTE ST 428-1
AVCOL_TRC_SMPTEST428_1 = AVCOL_TRC_SMPTE428,
AVCOL_TRC_ARIB_STD_B67 = 18, ///< ARIB STD-B67, known as "Hybrid log-gamma"
AVCOL_TRC_NB ///< Not part of ABI
AVCOL_TRC_NB, ///< Not part of ABI
/* The following entries are not part of H.273, but custom extensions */
AVCOL_TRC_EXT_BASE = 256,
AVCOL_TRC_V_LOG = AVCOL_TRC_EXT_BASE,
AVCOL_TRC_EXT_NB ///< Not part of ABI
};
/**

10
libavutil/tests/color_utils.c
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@@ -57,7 +57,10 @@ int main(int argc, char *argv[])
15123.4567, 19845.88923, 98678.4231, 99999.899998
};
for (enum AVColorTransferCharacteristic trc = 0; trc < AVCOL_TRC_NB; trc++) {
for (enum AVColorTransferCharacteristic trc = 0; trc < AVCOL_TRC_EXT_NB; trc++) {
if (trc == AVCOL_TRC_NB)
trc = AVCOL_TRC_EXT_BASE;
av_csp_trc_function func = av_csp_trc_func_from_id(trc);
av_csp_trc_function func_inv = av_csp_trc_func_inv_from_id(trc);
const char *name = av_color_transfer_name(trc);
@@ -77,7 +80,10 @@ int main(int argc, char *argv[])
}
}
for (enum AVColorTransferCharacteristic trc = 0; trc < AVCOL_TRC_NB; trc++) {
for (enum AVColorTransferCharacteristic trc = 0; trc < AVCOL_TRC_EXT_NB; trc++) {
if (trc == AVCOL_TRC_NB)
trc = AVCOL_TRC_EXT_BASE;
av_csp_eotf_function eotf = av_csp_itu_eotf(trc);
av_csp_eotf_function eotf_inv = av_csp_itu_eotf_inv(trc);
const char *trc_name = av_color_transfer_name(trc);

2
libswscale/format.c
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@@ -1295,9 +1295,11 @@ static AVRational *generate_bayer_matrix(const int size_log2)
static bool trc_is_hdr(enum AVColorTransferCharacteristic trc)
{
static_assert(AVCOL_TRC_NB == 19, "Update this list when adding TRCs");
static_assert(AVCOL_TRC_EXT_NB == 257, "Update this list when adding TRCs");
switch (trc) {
case AVCOL_TRC_LOG:
case AVCOL_TRC_LOG_SQRT:
case AVCOL_TRC_V_LOG:
case AVCOL_TRC_SMPTEST2084:
case AVCOL_TRC_ARIB_STD_B67:
return true;

19
tests/ref/fate/color_utils
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@@ -302,6 +302,25 @@ trc=arib-std-b67 calling func(15123.456700) expected=2.725380 roundtrip=15123.45
trc=arib-std-b67 calling func(19845.889230) expected=2.773978 roundtrip=19845.889230
trc=arib-std-b67 calling func(98678.423100) expected=3.060803 roundtrip=98678.423100
trc=arib-std-b67 calling func(99999.899998) expected=3.063182 roundtrip=99999.899998
trc=vlog calling func(-0.100000) expected=-0.435000 roundtrip=-0.100000
trc=vlog calling func(-0.018054) expected=0.023898 roundtrip=-0.018054
trc=vlog calling func(-0.010000) expected=0.069000 roundtrip=-0.010000
trc=vlog calling func(-0.004490) expected=0.099856 roundtrip=-0.004490
trc=vlog calling func(0.000000) expected=0.125000 roundtrip=0.000000
trc=vlog calling func(0.003162) expected=0.142709 roundtrip=0.003162
trc=vlog calling func(0.005000) expected=0.153000 roundtrip=0.005000
trc=vlog calling func(0.009000) expected=0.175400 roundtrip=0.009000
trc=vlog calling func(0.015000) expected=0.205818 roundtrip=0.015000
trc=vlog calling func(0.100000) expected=0.365471 roundtrip=0.100000
trc=vlog calling func(1.000000) expected=0.599118 roundtrip=1.000000
trc=vlog calling func(52.370000) expected=1.013406 roundtrip=52.370000
trc=vlog calling func(125.098765) expected=1.104729 roundtrip=125.098765
trc=vlog calling func(1999.111230) expected=1.395405 roundtrip=1999.111230
trc=vlog calling func(6945.443000) expected=1.526030 roundtrip=6945.443000
trc=vlog calling func(15123.456700) expected=1.607650 roundtrip=15123.456700
trc=vlog calling func(19845.889230) expected=1.636154 roundtrip=19845.889230
trc=vlog calling func(98678.423100) expected=1.804381 roundtrip=98678.423100
trc=vlog calling func(99999.899998) expected=1.805776 roundtrip=99999.899998
trc=bt709 EOTF(50, 0, {0}) = {0}
trc=bt709 EOTF(50, 0, {0.1}) = {0.199054}
trc=bt709 EOTF(50, 0, {0.2}) = {1.05061}