mirror of
https://github.com/mpv-player/mpv
synced 2024-12-22 23:02:37 +00:00
345 lines
10 KiB
C
345 lines
10 KiB
C
/*
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* This file is part of mpv.
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*
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* mpv is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* mpv is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with mpv. If not, see <http://www.gnu.org/licenses/>.
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*
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* You can alternatively redistribute this file and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*/
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#include <string.h>
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#include "talloc.h"
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#include "config.h"
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#include "stream/stream.h"
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#include "common/common.h"
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#include "misc/bstr.h"
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#include "common/msg.h"
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#include "options/m_option.h"
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#include "options/path.h"
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#include "gl_video.h"
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#include "gl_lcms.h"
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#include "osdep/io.h"
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#if HAVE_LCMS2
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#include <lcms2.h>
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#include <libavutil/sha.h>
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#include <libavutil/mem.h>
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struct gl_lcms {
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void *icc_data;
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size_t icc_size;
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char *icc_path;
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bool changed;
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struct mp_log *log;
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struct mpv_global *global;
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struct mp_icc_opts opts;
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};
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static bool parse_3dlut_size(const char *arg, int *p1, int *p2, int *p3)
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{
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if (sscanf(arg, "%dx%dx%d", p1, p2, p3) != 3)
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return false;
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for (int n = 0; n < 3; n++) {
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int s = ((int[]) { *p1, *p2, *p3 })[n];
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if (s < 2 || s > 512 || ((s - 1) & s))
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return false;
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}
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return true;
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}
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static int validate_3dlut_size_opt(struct mp_log *log, const m_option_t *opt,
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struct bstr name, struct bstr param)
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{
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int p1, p2, p3;
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char s[20];
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snprintf(s, sizeof(s), "%.*s", BSTR_P(param));
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return parse_3dlut_size(s, &p1, &p2, &p3);
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}
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#define OPT_BASE_STRUCT struct mp_icc_opts
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const struct m_sub_options mp_icc_conf = {
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.opts = (const m_option_t[]) {
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OPT_STRING("icc-profile", profile, 0),
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OPT_FLAG("icc-profile-auto", profile_auto, 0),
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OPT_STRING("icc-cache-dir", cache_dir, 0),
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OPT_INT("icc-intent", intent, 0),
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OPT_STRING_VALIDATE("3dlut-size", size_str, 0, validate_3dlut_size_opt),
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OPT_REMOVED("icc-cache", "see icc-cache-dir"),
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{0}
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},
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.size = sizeof(struct mp_icc_opts),
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.defaults = &(const struct mp_icc_opts) {
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.size_str = "128x256x64",
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.intent = INTENT_RELATIVE_COLORIMETRIC,
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},
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};
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static void lcms2_error_handler(cmsContext ctx, cmsUInt32Number code,
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const char *msg)
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{
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struct gl_lcms *p = cmsGetContextUserData(ctx);
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MP_ERR(p, "lcms2: %s\n", msg);
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}
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static bool load_profile(struct gl_lcms *p)
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{
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if (p->icc_data && p->icc_size)
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return true;
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if (!p->icc_path)
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return false;
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char *fname = mp_get_user_path(NULL, p->global, p->icc_path);
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MP_VERBOSE(p, "Opening ICC profile '%s'\n", fname);
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struct bstr iccdata = stream_read_file(fname, p, p->global,
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100000000); // 100 MB
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talloc_free(fname);
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if (!iccdata.len)
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return false;
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p->icc_data = iccdata.start;
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p->icc_size = iccdata.len;
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return true;
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}
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struct gl_lcms *gl_lcms_init(void *talloc_ctx, struct mp_log *log,
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struct mpv_global *global)
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{
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struct gl_lcms *p = talloc_ptrtype(talloc_ctx, p);
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*p = (struct gl_lcms) {
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.global = global,
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.log = log,
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.changed = true,
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};
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return p;
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}
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void gl_lcms_set_options(struct gl_lcms *p, struct mp_icc_opts *opts)
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{
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p->opts = *opts;
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p->icc_path = talloc_strdup(p, p->opts.profile);
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load_profile(p);
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p->changed = true; // probably
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}
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// Warning: profile.start must point to a ta allocation, and the function
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// takes over ownership.
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void gl_lcms_set_memory_profile(struct gl_lcms *p, bstr *profile)
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{
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if (!p->opts.profile_auto) {
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talloc_free(profile->start);
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return;
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}
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if (!p->icc_path && p->icc_data && profile->start &&
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profile->len == p->icc_size &&
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memcmp(profile->start, p->icc_data, p->icc_size) == 0)
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{
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talloc_free(profile->start);
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return;
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}
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p->changed = true;
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talloc_free(p->icc_path);
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p->icc_path = NULL;
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talloc_free(p->icc_data);
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p->icc_data = talloc_steal(p, profile->start);
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p->icc_size = profile->len;
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}
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// Return and _reset_ whether the lookul table has changed since the last call.
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// If it has changed, gl_lcms_get_lut3d() should be called.
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bool gl_lcms_has_changed(struct gl_lcms *p)
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{
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bool change = p->changed;
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p->changed = false;
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return change;
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}
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bool gl_lcms_get_lut3d(struct gl_lcms *p, struct lut3d **result_lut3d)
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{
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int s_r, s_g, s_b;
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bool result = false;
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if (!parse_3dlut_size(p->opts.size_str, &s_r, &s_g, &s_b))
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return false;
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if (!p->icc_data && !p->icc_path)
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return false;
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void *tmp = talloc_new(NULL);
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uint16_t *output = talloc_array(tmp, uint16_t, s_r * s_g * s_b * 3);
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struct lut3d *lut = NULL;
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cmsContext cms = NULL;
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char *cache_file = NULL;
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if (p->opts.cache_dir && p->opts.cache_dir[0]) {
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// Gamma is included in the header to help uniquely identify it,
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// because we may change the parameter in the future or make it
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// customizable, same for the primaries.
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char *cache_info = talloc_asprintf(tmp,
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"ver=1.1, intent=%d, size=%dx%dx%d, gamma=2.4, prim=bt2020\n",
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p->opts.intent, s_r, s_g, s_b);
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uint8_t hash[32];
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struct AVSHA *sha = av_sha_alloc();
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if (!sha)
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abort();
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av_sha_init(sha, 256);
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av_sha_update(sha, cache_info, strlen(cache_info));
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av_sha_update(sha, p->icc_data, p->icc_size);
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av_sha_final(sha, hash);
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av_free(sha);
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char *cache_dir = mp_get_user_path(tmp, p->global, p->opts.cache_dir);
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cache_file = talloc_strdup(tmp, "");
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for (int i = 0; i < sizeof(hash); i++)
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cache_file = talloc_asprintf_append(cache_file, "%02X", hash[i]);
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cache_file = mp_path_join(tmp, cache_dir, cache_file);
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mp_mkdirp(cache_dir);
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}
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// check cache
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if (cache_file) {
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MP_VERBOSE(p, "Opening 3D LUT cache in file '%s'.\n", cache_file);
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struct bstr cachedata = stream_read_file(cache_file, tmp, p->global,
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1000000000); // 1 GB
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if (cachedata.len == talloc_get_size(output)) {
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memcpy(output, cachedata.start, cachedata.len);
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goto done;
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} else {
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MP_WARN(p, "3D LUT cache invalid!\n");
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}
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}
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cms = cmsCreateContext(NULL, p);
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if (!cms)
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goto error_exit;
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cmsSetLogErrorHandlerTHR(cms, lcms2_error_handler);
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cmsHPROFILE profile =
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cmsOpenProfileFromMemTHR(cms, p->icc_data, p->icc_size);
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if (!profile)
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goto error_exit;
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// We always generate the 3DLUT against BT.2020, and transform into this
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// space inside the shader if the source differs.
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struct mp_csp_primaries csp = mp_get_csp_primaries(MP_CSP_PRIM_BT_2020);
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cmsCIExyY wp = {csp.white.x, csp.white.y, 1.0};
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cmsCIExyYTRIPLE prim = {
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.Red = {csp.red.x, csp.red.y, 1.0},
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.Green = {csp.green.x, csp.green.y, 1.0},
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.Blue = {csp.blue.x, csp.blue.y, 1.0},
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};
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// 2.4 is arbitrarily used as a gamma compression factor for the 3DLUT,
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// reducing artifacts due to rounding errors on wide gamut profiles
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cmsToneCurve *tonecurve = cmsBuildGamma(cms, 2.4);
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cmsHPROFILE vid_profile = cmsCreateRGBProfileTHR(cms, &wp, &prim,
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(cmsToneCurve*[3]){tonecurve, tonecurve, tonecurve});
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cmsFreeToneCurve(tonecurve);
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cmsHTRANSFORM trafo = cmsCreateTransformTHR(cms, vid_profile, TYPE_RGB_16,
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profile, TYPE_RGB_16,
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p->opts.intent,
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cmsFLAGS_HIGHRESPRECALC);
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cmsCloseProfile(profile);
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cmsCloseProfile(vid_profile);
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if (!trafo)
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goto error_exit;
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// transform a (s_r)x(s_g)x(s_b) cube, with 3 components per channel
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uint16_t *input = talloc_array(tmp, uint16_t, s_r * 3);
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for (int b = 0; b < s_b; b++) {
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for (int g = 0; g < s_g; g++) {
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for (int r = 0; r < s_r; r++) {
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input[r * 3 + 0] = r * 65535 / (s_r - 1);
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input[r * 3 + 1] = g * 65535 / (s_g - 1);
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input[r * 3 + 2] = b * 65535 / (s_b - 1);
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}
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size_t base = (b * s_r * s_g + g * s_r) * 3;
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cmsDoTransform(trafo, input, output + base, s_r);
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}
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}
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cmsDeleteTransform(trafo);
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if (cache_file) {
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FILE *out = fopen(cache_file, "wb");
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if (out) {
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fwrite(output, talloc_get_size(output), 1, out);
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fclose(out);
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}
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}
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done: ;
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lut = talloc_ptrtype(NULL, lut);
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*lut = (struct lut3d) {
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.data = talloc_steal(lut, output),
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.size = {s_r, s_g, s_b},
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};
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*result_lut3d = lut;
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result = true;
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error_exit:
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if (cms)
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cmsDeleteContext(cms);
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if (!lut)
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MP_FATAL(p, "Error loading ICC profile.\n");
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talloc_free(tmp);
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return result;
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}
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#else /* HAVE_LCMS2 */
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const struct m_sub_options mp_icc_conf = {
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.opts = (const m_option_t[]) { {0} },
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.size = sizeof(struct mp_icc_opts),
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.defaults = &(const struct mp_icc_opts) {0},
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};
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struct gl_lcms *gl_lcms_init(void *talloc_ctx, struct mp_log *log,
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struct mpv_global *global)
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{
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return (struct gl_lcms *) talloc_new(talloc_ctx);
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}
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void gl_lcms_set_options(struct gl_lcms *p, struct mp_icc_opts *opts) { }
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void gl_lcms_set_memory_profile(struct gl_lcms *p, bstr *profile) { }
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bool gl_lcms_get_lut3d(struct gl_lcms *p, struct lut3d **x) { return false; }
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bool gl_lcms_has_changed(struct gl_lcms *p) { return false; }
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#endif
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