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Code Issues Releases Activity

avfilter/vf_lut3d: add cineSpace 3D lut support

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This commit is contained in:
Paul B Mahol 2019-04-19 19:44:45 +02:00
parent b9d25b1a6e
commit e20ad3bd59
2 changed files with 93 additions and 0 deletions
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2
doc/filters.texi
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@ -11715,6 +11715,8 @@ Iridas
DaVinci DaVinci
@item m3d @item m3d
Pandora Pandora
@item csp
cineSpace
@end table @end table
@item interp @item interp
Select interpolation mode. Select interpolation mode.

91
libavfilter/vf_lut3d.c
View File

@ -523,6 +523,95 @@ static int parse_m3d(AVFilterContext *ctx, FILE *f)
return 0; return 0;
} }
static int parse_cinespace(AVFilterContext *ctx, FILE *f)
{
LUT3DContext *lut3d = ctx->priv;
char line[MAX_LINE_SIZE];
float in_min[3] = {0.0, 0.0, 0.0};
float in_max[3] = {1.0, 1.0, 1.0};
float out_min[3] = {0.0, 0.0, 0.0};
float out_max[3] = {1.0, 1.0, 1.0};
int inside_metadata = 0, size;
NEXT_LINE(skip_line(line));
if (strncmp(line, "CSPLUTV100", 10)) {
av_log(ctx, AV_LOG_ERROR, "Not cineSpace LUT format\n");
return AVERROR(EINVAL);
}
NEXT_LINE(skip_line(line));
if (strncmp(line, "3D", 2)) {
av_log(ctx, AV_LOG_ERROR, "Not 3D LUT format\n");
return AVERROR(EINVAL);
}
while (1) {
NEXT_LINE(skip_line(line));
if (!strncmp(line, "BEGIN METADATA", 14)) {
inside_metadata = 1;
continue;
}
if (!strncmp(line, "END METADATA", 12)) {
inside_metadata = 0;
continue;
}
if (inside_metadata == 0) {
int size_r, size_g, size_b;
for (int i = 0; i < 3; i++) {
int npoints = strtol(line, NULL, 0);
if (npoints != 2) {
av_log(ctx, AV_LOG_ERROR, "Unsupported number of pre-lut points.\n");
return AVERROR_PATCHWELCOME;
}
NEXT_LINE(skip_line(line));
if (av_sscanf(line, "%f %f", &in_min[i], &in_max[i]) != 2)
return AVERROR_INVALIDDATA;
NEXT_LINE(skip_line(line));
if (av_sscanf(line, "%f %f", &out_min[i], &out_max[i]) != 2)
return AVERROR_INVALIDDATA;
NEXT_LINE(skip_line(line));
}
if (av_sscanf(line, "%d %d %d", &size_r, &size_g, &size_b) != 3)
return AVERROR(EINVAL);
if (size_r != size_g || size_r != size_b) {
av_log(ctx, AV_LOG_ERROR, "Unsupported size combination: %dx%dx%d.\n", size_r, size_g, size_b);
return AVERROR_PATCHWELCOME;
}
size = size_r;
if (size < 2 || size > MAX_LEVEL) {
av_log(ctx, AV_LOG_ERROR, "Too large or invalid 3D LUT size\n");
return AVERROR(EINVAL);
}
lut3d->lutsize = size;
for (int k = 0; k < size; k++) {
for (int j = 0; j < size; j++) {
for (int i = 0; i < size; i++) {
struct rgbvec *vec = &lut3d->lut[i][j][k];
if (k != 0 || j != 0 || i != 0)
NEXT_LINE(skip_line(line));
if (av_sscanf(line, "%f %f %f", &vec->r, &vec->g, &vec->b) != 3)
return AVERROR_INVALIDDATA;
vec->r *= out_max[0] - out_min[0];
vec->g *= out_max[1] - out_min[1];
vec->b *= out_max[2] - out_min[2];
}
}
}
break;
}
}
return 0;
}
static void set_identity_matrix(LUT3DContext *lut3d, int size) static void set_identity_matrix(LUT3DContext *lut3d, int size)
{ {
int i, j, k; int i, j, k;
@ -704,6 +793,8 @@ static av_cold int lut3d_init(AVFilterContext *ctx)
ret = parse_cube(ctx, f); ret = parse_cube(ctx, f);
} else if (!av_strcasecmp(ext, "m3d")) { } else if (!av_strcasecmp(ext, "m3d")) {
ret = parse_m3d(ctx, f); ret = parse_m3d(ctx, f);
} else if (!av_strcasecmp(ext, "csp")) {
ret = parse_cinespace(ctx, f);
} else { } else {
av_log(ctx, AV_LOG_ERROR, "Unrecognized '.%s' file type\n", ext); av_log(ctx, AV_LOG_ERROR, "Unrecognized '.%s' file type\n", ext);
ret = AVERROR(EINVAL); ret = AVERROR(EINVAL);