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-rw-r--r--video/out/opengl/gl_lcms.c344
1 files changed, 344 insertions, 0 deletions
diff --git a/video/out/opengl/gl_lcms.c b/video/out/opengl/gl_lcms.c
new file mode 100644
index 0000000000..ec3013c553
--- /dev/null
+++ b/video/out/opengl/gl_lcms.c
@@ -0,0 +1,344 @@
+/*
+ * This file is part of mpv.
+ *
+ * mpv is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * mpv is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with mpv. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * You can alternatively redistribute this file and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ */
+
+#include <string.h>
+
+#include "talloc.h"
+
+#include "config.h"
+
+#include "stream/stream.h"
+#include "common/common.h"
+#include "misc/bstr.h"
+#include "common/msg.h"
+#include "options/m_option.h"
+#include "options/path.h"
+
+#include "gl_video.h"
+#include "gl_lcms.h"
+
+#include "osdep/io.h"
+
+#if HAVE_LCMS2
+
+#include <lcms2.h>
+#include <libavutil/sha.h>
+#include <libavutil/mem.h>
+
+struct gl_lcms {
+ void *icc_data;
+ size_t icc_size;
+ char *icc_path;
+ bool changed;
+
+ struct mp_log *log;
+ struct mpv_global *global;
+ struct mp_icc_opts opts;
+};
+
+static bool parse_3dlut_size(const char *arg, int *p1, int *p2, int *p3)
+{
+ if (sscanf(arg, "%dx%dx%d", p1, p2, p3) != 3)
+ return false;
+ for (int n = 0; n < 3; n++) {
+ int s = ((int[]) { *p1, *p2, *p3 })[n];
+ if (s < 2 || s > 512 || ((s - 1) & s))
+ return false;
+ }
+ return true;
+}
+
+static int validate_3dlut_size_opt(struct mp_log *log, const m_option_t *opt,
+ struct bstr name, struct bstr param)
+{
+ int p1, p2, p3;
+ char s[20];
+ snprintf(s, sizeof(s), "%.*s", BSTR_P(param));
+ return parse_3dlut_size(s, &p1, &p2, &p3);
+}
+
+#define OPT_BASE_STRUCT struct mp_icc_opts
+const struct m_sub_options mp_icc_conf = {
+ .opts = (const m_option_t[]) {
+ OPT_STRING("icc-profile", profile, 0),
+ OPT_FLAG("icc-profile-auto", profile_auto, 0),
+ OPT_STRING("icc-cache-dir", cache_dir, 0),
+ OPT_INT("icc-intent", intent, 0),
+ OPT_STRING_VALIDATE("3dlut-size", size_str, 0, validate_3dlut_size_opt),
+
+ OPT_REMOVED("icc-cache", "see icc-cache-dir"),
+ {0}
+ },
+ .size = sizeof(struct mp_icc_opts),
+ .defaults = &(const struct mp_icc_opts) {
+ .size_str = "128x256x64",
+ .intent = INTENT_RELATIVE_COLORIMETRIC,
+ },
+};
+
+static void lcms2_error_handler(cmsContext ctx, cmsUInt32Number code,
+ const char *msg)
+{
+ struct gl_lcms *p = cmsGetContextUserData(ctx);
+ MP_ERR(p, "lcms2: %s\n", msg);
+}
+
+static bool load_profile(struct gl_lcms *p)
+{
+ if (p->icc_data && p->icc_size)
+ return true;
+
+ if (!p->icc_path)
+ return false;
+
+ char *fname = mp_get_user_path(NULL, p->global, p->icc_path);
+ MP_VERBOSE(p, "Opening ICC profile '%s'\n", fname);
+ struct bstr iccdata = stream_read_file(fname, p, p->global,
+ 100000000); // 100 MB
+ talloc_free(fname);
+ if (!iccdata.len)
+ return false;
+
+ p->icc_data = iccdata.start;
+ p->icc_size = iccdata.len;
+ return true;
+}
+
+struct gl_lcms *gl_lcms_init(void *talloc_ctx, struct mp_log *log,
+ struct mpv_global *global)
+{
+ struct gl_lcms *p = talloc_ptrtype(talloc_ctx, p);
+ *p = (struct gl_lcms) {
+ .global = global,
+ .log = log,
+ .changed = true,
+ };
+ return p;
+}
+
+void gl_lcms_set_options(struct gl_lcms *p, struct mp_icc_opts *opts)
+{
+ p->opts = *opts;
+ p->icc_path = talloc_strdup(p, p->opts.profile);
+ load_profile(p);
+ p->changed = true; // probably
+}
+
+// Warning: profile.start must point to a ta allocation, and the function
+// takes over ownership.
+void gl_lcms_set_memory_profile(struct gl_lcms *p, bstr *profile)
+{
+ if (!p->opts.profile_auto) {
+ talloc_free(profile->start);
+ return;
+ }
+
+ if (!p->icc_path && p->icc_data && profile->start &&
+ profile->len == p->icc_size &&
+ memcmp(profile->start, p->icc_data, p->icc_size) == 0)
+ {
+ talloc_free(profile->start);
+ return;
+ }
+
+ p->changed = true;
+
+ talloc_free(p->icc_path);
+ p->icc_path = NULL;
+
+ talloc_free(p->icc_data);
+
+ p->icc_data = talloc_steal(p, profile->start);
+ p->icc_size = profile->len;
+}
+
+// Return and _reset_ whether the lookul table has changed since the last call.
+// If it has changed, gl_lcms_get_lut3d() should be called.
+bool gl_lcms_has_changed(struct gl_lcms *p)
+{
+ bool change = p->changed;
+ p->changed = false;
+ return change;
+}
+
+bool gl_lcms_get_lut3d(struct gl_lcms *p, struct lut3d **result_lut3d)
+{
+ int s_r, s_g, s_b;
+ bool result = false;
+
+ if (!parse_3dlut_size(p->opts.size_str, &s_r, &s_g, &s_b))
+ return false;
+
+ if (!p->icc_data && !p->icc_path)
+ return false;
+
+ void *tmp = talloc_new(NULL);
+ uint16_t *output = talloc_array(tmp, uint16_t, s_r * s_g * s_b * 3);
+ struct lut3d *lut = NULL;
+ cmsContext cms = NULL;
+
+ char *cache_file = NULL;
+ if (p->opts.cache_dir && p->opts.cache_dir[0]) {
+ // Gamma is included in the header to help uniquely identify it,
+ // because we may change the parameter in the future or make it
+ // customizable, same for the primaries.
+ char *cache_info = talloc_asprintf(tmp,
+ "ver=1.1, intent=%d, size=%dx%dx%d, gamma=2.4, prim=bt2020\n",
+ p->opts.intent, s_r, s_g, s_b);
+
+ uint8_t hash[32];
+ struct AVSHA *sha = av_sha_alloc();
+ if (!sha)
+ abort();
+ av_sha_init(sha, 256);
+ av_sha_update(sha, cache_info, strlen(cache_info));
+ av_sha_update(sha, p->icc_data, p->icc_size);
+ av_sha_final(sha, hash);
+ av_free(sha);
+
+ char *cache_dir = mp_get_user_path(tmp, p->global, p->opts.cache_dir);
+ cache_file = talloc_strdup(tmp, "");
+ for (int i = 0; i < sizeof(hash); i++)
+ cache_file = talloc_asprintf_append(cache_file, "%02X", hash[i]);
+ cache_file = mp_path_join(tmp, cache_dir, cache_file);
+
+ mp_mkdirp(cache_dir);
+ }
+
+ // check cache
+ if (cache_file) {
+ MP_VERBOSE(p, "Opening 3D LUT cache in file '%s'.\n", cache_file);
+ struct bstr cachedata = stream_read_file(cache_file, tmp, p->global,
+ 1000000000); // 1 GB
+ if (cachedata.len == talloc_get_size(output)) {
+ memcpy(output, cachedata.start, cachedata.len);
+ goto done;
+ } else {
+ MP_WARN(p, "3D LUT cache invalid!\n");
+ }
+ }
+
+ cms = cmsCreateContext(NULL, p);
+ if (!cms)
+ goto error_exit;
+ cmsSetLogErrorHandlerTHR(cms, lcms2_error_handler);
+
+ cmsHPROFILE profile =
+ cmsOpenProfileFromMemTHR(cms, p->icc_data, p->icc_size);
+ if (!profile)
+ goto error_exit;
+
+ // We always generate the 3DLUT against BT.2020, and transform into this
+ // space inside the shader if the source differs.
+ struct mp_csp_primaries csp = mp_get_csp_primaries(MP_CSP_PRIM_BT_2020);
+
+ cmsCIExyY wp = {csp.white.x, csp.white.y, 1.0};
+ cmsCIExyYTRIPLE prim = {
+ .Red = {csp.red.x, csp.red.y, 1.0},
+ .Green = {csp.green.x, csp.green.y, 1.0},
+ .Blue = {csp.blue.x, csp.blue.y, 1.0},
+ };
+
+ // 2.4 is arbitrarily used as a gamma compression factor for the 3DLUT,
+ // reducing artifacts due to rounding errors on wide gamut profiles
+ cmsToneCurve *tonecurve = cmsBuildGamma(cms, 2.4);
+ cmsHPROFILE vid_profile = cmsCreateRGBProfileTHR(cms, &wp, &prim,
+ (cmsToneCurve*[3]){tonecurve, tonecurve, tonecurve});
+ cmsFreeToneCurve(tonecurve);
+ cmsHTRANSFORM trafo = cmsCreateTransformTHR(cms, vid_profile, TYPE_RGB_16,
+ profile, TYPE_RGB_16,
+ p->opts.intent,
+ cmsFLAGS_HIGHRESPRECALC);
+ cmsCloseProfile(profile);
+ cmsCloseProfile(vid_profile);
+
+ if (!trafo)
+ goto error_exit;
+
+ // transform a (s_r)x(s_g)x(s_b) cube, with 3 components per channel
+ uint16_t *input = talloc_array(tmp, uint16_t, s_r * 3);
+ for (int b = 0; b < s_b; b++) {
+ for (int g = 0; g < s_g; g++) {
+ for (int r = 0; r < s_r; r++) {
+ input[r * 3 + 0] = r * 65535 / (s_r - 1);
+ input[r * 3 + 1] = g * 65535 / (s_g - 1);
+ input[r * 3 + 2] = b * 65535 / (s_b - 1);
+ }
+ size_t base = (b * s_r * s_g + g * s_r) * 3;
+ cmsDoTransform(trafo, input, output + base, s_r);
+ }
+ }
+
+ cmsDeleteTransform(trafo);
+
+ if (cache_file) {
+ FILE *out = fopen(cache_file, "wb");
+ if (out) {
+ fwrite(output, talloc_get_size(output), 1, out);
+ fclose(out);
+ }
+ }
+
+done: ;
+
+ lut = talloc_ptrtype(NULL, lut);
+ *lut = (struct lut3d) {
+ .data = talloc_steal(lut, output),
+ .size = {s_r, s_g, s_b},
+ };
+
+ *result_lut3d = lut;
+ result = true;
+
+error_exit:
+
+ if (cms)
+ cmsDeleteContext(cms);
+
+ if (!lut)
+ MP_FATAL(p, "Error loading ICC profile.\n");
+
+ talloc_free(tmp);
+ return result;
+}
+
+#else /* HAVE_LCMS2 */
+
+const struct m_sub_options mp_icc_conf = {
+ .opts = (const m_option_t[]) { {0} },
+ .size = sizeof(struct mp_icc_opts),
+ .defaults = &(const struct mp_icc_opts) {0},
+};
+
+
+struct gl_lcms *gl_lcms_init(void *talloc_ctx, struct mp_log *log,
+ struct mpv_global *global)
+{
+ return (struct gl_lcms *) talloc_new(talloc_ctx);
+}
+
+void gl_lcms_set_options(struct gl_lcms *p, struct mp_icc_opts *opts) { }
+void gl_lcms_set_memory_profile(struct gl_lcms *p, bstr *profile) { }
+bool gl_lcms_get_lut3d(struct gl_lcms *p, struct lut3d **x) { return false; }
+bool gl_lcms_has_changed(struct gl_lcms *p) { return false; }
+
+#endif
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