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Code Issues Releases Activity

avfilter/vf_lut3d: add cineSpace 1D lut parsing

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This commit is contained in:
Paul B Mahol 2019-04-19 19:28:02 +02:00
parent bf4245e952
commit b9d25b1a6e
2 changed files with 79 additions and 0 deletions
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2
doc/filters.texi
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@ -11671,6 +11671,8 @@ Currently supported formats:
@table @samp
@item cube
Iridas
@item csp
cineSpace
@end table
@item interp

77
libavfilter/vf_lut3d.c
View File

@ -1019,6 +1019,81 @@ static void set_identity_matrix_1d(LUT1DContext *lut1d, int size)
}
}
static int parse_cinespace_1d(AVFilterContext *ctx, FILE *f)
{
LUT1DContext *lut1d = 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, "1D", 2)) {
av_log(ctx, AV_LOG_ERROR, "Not 1D 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) {
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));
}
size = strtol(line, NULL, 0);
if (size < 2 || size > MAX_1D_LEVEL) {
av_log(ctx, AV_LOG_ERROR, "Too large or invalid 1D LUT size\n");
return AVERROR(EINVAL);
}
lut1d->lutsize = size;
for (int i = 0; i < size; i++) {
NEXT_LINE(skip_line(line));
if (av_sscanf(line, "%f %f %f", &lut1d->lut[0][i], &lut1d->lut[1][i], &lut1d->lut[2][i]) != 3)
return AVERROR_INVALIDDATA;
lut1d->lut[0][i] *= out_max[0] - out_min[0];
lut1d->lut[1][i] *= out_max[1] - out_min[1];
lut1d->lut[2][i] *= out_max[2] - out_min[2];
}
break;
}
}
return 0;
}
static int parse_cube_1d(AVFilterContext *ctx, FILE *f)
{
LUT1DContext *lut1d = ctx->priv;
@ -1400,6 +1475,8 @@ static av_cold int lut1d_init(AVFilterContext *ctx)
if (!av_strcasecmp(ext, "cube") || !av_strcasecmp(ext, "1dlut")) {
ret = parse_cube_1d(ctx, f);
} else if (!av_strcasecmp(ext, "csp")) {
ret = parse_cinespace_1d(ctx, f);
} else {
av_log(ctx, AV_LOG_ERROR, "Unrecognized '.%s' file type\n", ext);
ret = AVERROR(EINVAL);