Signed-off-by: Paul B Mahol
---
doc/filters.texi | 2 +
libavfilter/vf_lut3d.c | 91 ++
2 files changed, 93 insertions(+)
diff --git a/doc/filters.texi b/doc/filters.texi
index 606d682e84..aaa9163d89 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -11683,6 +11683,8 @@ Iridas
DaVinci
@item m3d
Pandora
+@item csp
+cineSpace
@end table
@item interp
Select interpolation mode.
diff --git a/libavfilter/vf_lut3d.c b/libavfilter/vf_lut3d.c
index 1b6a191b3b..50ea5a8545 100644
--- a/libavfilter/vf_lut3d.c
+++ b/libavfilter/vf_lut3d.c
@@ -523,6 +523,95 @@ static int parse_m3d(AVFilterContext *ctx, FILE *f)
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)
{
int i, j, k;
@@ -704,6 +793,8 @@ static av_cold int lut3d_init(AVFilterContext *ctx)
ret = parse_cube(ctx, f);
} else if (!av_strcasecmp(ext, "m3d")) {
ret = parse_m3d(ctx, f);
+} else if (!av_strcasecmp(ext, "csp")) {
+ret = parse_cinespace(ctx, f);
} else {
av_log(ctx, AV_LOG_ERROR, "Unrecognized '.%s' file type\n", ext);
ret = AVERROR(EINVAL);
--
2.17.1
___
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
To unsubscribe, visit link above, or email
ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
