[FFmpeg-cvslog] avfilter/vf_lut3d: add cineSpace 3D lut support
Paul B Mahol
git at videolan.org
Sat Apr 20 15:15:12 EEST 2019
ffmpeg | branch: master | Paul B Mahol <onemda at gmail.com> | Fri Apr 19 19:44:45 2019 +0200| [e20ad3bd59cc575fbd373a4cd71a1aa782251162] | committer: Paul B Mahol
avfilter/vf_lut3d: add cineSpace 3D lut support
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=e20ad3bd59cc575fbd373a4cd71a1aa782251162
---
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 e2d17cc425..f04c48c9e7 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -11715,6 +11715,8 @@ Iridas
DaVinci
@item m3d
Pandora
+ at 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);
More information about the ffmpeg-cvslog
mailing list