mirror of
https://github.com/mpv-player/mpv
synced 2024-12-24 07:42:17 +00:00
ec7bc388d1
For segment linking (this mechanism matches file extensions to avoid opening files which are most likely not Matroska files in order to speed up scanning).
600 lines
22 KiB
C
600 lines
22 KiB
C
/*
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* This file is part of MPlayer.
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*
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* MPlayer 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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* MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <stdlib.h>
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#include <stdbool.h>
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#include <inttypes.h>
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#include <assert.h>
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#include <dirent.h>
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#include <string.h>
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#include <strings.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <libavutil/common.h>
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#include "osdep/io.h"
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#include "talloc.h"
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#include "player/core.h"
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#include "common/msg.h"
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#include "demux/demux.h"
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#include "options/path.h"
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#include "misc/bstr.h"
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#include "common/common.h"
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#include "common/playlist.h"
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#include "stream/stream.h"
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struct find_entry {
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char *name;
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int matchlen;
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off_t size;
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};
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static int cmp_entry(const void *pa, const void *pb)
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{
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const struct find_entry *a = pa, *b = pb;
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// check "similar" filenames first
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int matchdiff = b->matchlen - a->matchlen;
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if (matchdiff)
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return FFSIGN(matchdiff);
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// check small files first
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off_t sizediff = a->size - b->size;
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if (sizediff)
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return FFSIGN(sizediff);
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return 0;
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}
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static bool test_matroska_ext(const char *filename)
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{
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static const char *const exts[] = {".mkv", ".mka", ".mks", ".mk3d", NULL};
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for (int n = 0; exts[n]; n++) {
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const char *suffix = exts[n];
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int offset = strlen(filename) - strlen(suffix);
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// name must end with suffix
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if (offset > 0 && strcasecmp(filename + offset, suffix) == 0)
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return true;
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}
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return false;
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}
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static char **find_files(const char *original_file)
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{
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void *tmpmem = talloc_new(NULL);
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char *basename = mp_basename(original_file);
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struct bstr directory = mp_dirname(original_file);
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char **results = talloc_size(NULL, 0);
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char *dir_zero = bstrdup0(tmpmem, directory);
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DIR *dp = opendir(dir_zero);
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if (!dp) {
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talloc_free(tmpmem);
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return results;
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}
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struct find_entry *entries = NULL;
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struct dirent *ep;
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int num_results = 0;
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while ((ep = readdir(dp))) {
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if (!test_matroska_ext(ep->d_name))
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continue;
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// don't list the original name
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if (!strcmp(ep->d_name, basename))
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continue;
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char *name = mp_path_join(results, directory, bstr0(ep->d_name));
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char *s1 = ep->d_name;
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char *s2 = basename;
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int matchlen = 0;
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while (*s1 && *s1++ == *s2++)
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matchlen++;
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// be a bit more fuzzy about matching the filename
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matchlen = (matchlen + 3) / 5;
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struct stat statbuf;
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if (stat(name, &statbuf) != 0)
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continue;
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off_t size = statbuf.st_size;
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entries = talloc_realloc(tmpmem, entries, struct find_entry,
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num_results + 1);
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entries[num_results] = (struct find_entry) { name, matchlen, size };
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num_results++;
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}
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closedir(dp);
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// NOTE: maybe should make it compare pointers instead
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if (entries)
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qsort(entries, num_results, sizeof(struct find_entry), cmp_entry);
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results = talloc_realloc(NULL, results, char *, num_results);
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for (int i = 0; i < num_results; i++) {
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results[i] = entries[i].name;
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}
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talloc_free(tmpmem);
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return results;
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}
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static int enable_cache(struct MPContext *mpctx, struct stream **stream,
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struct demuxer **demuxer, struct demuxer_params *params)
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{
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struct MPOpts *opts = mpctx->opts;
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if (!stream_wants_cache(*stream, &opts->stream_cache))
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return 0;
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char *filename = talloc_strdup(NULL, (*demuxer)->filename);
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free_demuxer(*demuxer);
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free_stream(*stream);
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*stream = stream_open(filename, mpctx->global);
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if (!*stream) {
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talloc_free(filename);
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return -1;
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}
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stream_enable_cache(stream, &opts->stream_cache);
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*demuxer = demux_open(*stream, "mkv", params, mpctx->global);
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if (!*demuxer) {
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talloc_free(filename);
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free_stream(*stream);
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return -1;
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}
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talloc_free(filename);
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return 1;
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}
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static bool has_source_request(struct matroska_segment_uid *uids,
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int num_sources,
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struct matroska_segment_uid *new_uid)
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{
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for (int i = 0; i < num_sources; ++i) {
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if (demux_matroska_uid_cmp(uids + i, new_uid))
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return true;
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}
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return false;
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}
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// segment = get Nth segment of a multi-segment file
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static bool check_file_seg(struct MPContext *mpctx, struct demuxer ***sources,
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int *num_sources, struct matroska_segment_uid **uids,
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char *filename, int segment)
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{
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bool was_valid = false;
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struct demuxer_params params = {
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.matroska_num_wanted_uids = *num_sources,
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.matroska_wanted_uids = *uids,
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.matroska_wanted_segment = segment,
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.matroska_was_valid = &was_valid,
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};
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struct stream *s = stream_open(filename, mpctx->global);
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if (!s)
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return false;
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struct demuxer *d = demux_open(s, "mkv", ¶ms, mpctx->global);
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if (!d) {
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free_stream(s);
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return was_valid;
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}
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if (d->type == DEMUXER_TYPE_MATROSKA) {
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struct matroska_data *m = &d->matroska_data;
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for (int i = 1; i < *num_sources; i++) {
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struct matroska_segment_uid *uid = *uids + i;
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if ((*sources)[i])
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continue;
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/* Accept the source if the segment uid matches and the edition
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* either matches or isn't specified. */
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if (!memcmp(uid->segment, m->uid.segment, 16) &&
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(!uid->edition || uid->edition == m->uid.edition)) {
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MP_INFO(mpctx, "Match for source %d: %s\n",
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i, d->filename);
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for (int j = 0; j < m->num_ordered_chapters; j++) {
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struct matroska_chapter *c = m->ordered_chapters + j;
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if (!c->has_segment_uid)
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continue;
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if (has_source_request(*uids, *num_sources, &c->uid))
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continue;
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/* Set the requested segment. */
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MP_TARRAY_GROW(NULL, *uids, *num_sources);
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memcpy((*uids) + *num_sources, &c->uid, sizeof(c->uid));
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/* Add a new source slot. */
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MP_TARRAY_APPEND(NULL, *sources, *num_sources, NULL);
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}
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if (enable_cache(mpctx, &s, &d, ¶ms) < 0)
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continue;
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(*sources)[i] = d;
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return true;
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}
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}
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}
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free_demuxer(d);
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free_stream(s);
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return was_valid;
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}
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static void check_file(struct MPContext *mpctx, struct demuxer ***sources,
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int *num_sources, struct matroska_segment_uid **uids,
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char *filename, int first)
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{
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for (int segment = first; ; segment++) {
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if (!check_file_seg(mpctx, sources, num_sources,
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uids, filename, segment))
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break;
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}
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}
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static bool missing(struct demuxer **sources, int num_sources)
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{
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for (int i = 0; i < num_sources; i++) {
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if (!sources[i])
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return true;
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}
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return false;
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}
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static int find_ordered_chapter_sources(struct MPContext *mpctx,
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struct demuxer ***sources,
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int *num_sources,
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struct matroska_segment_uid **uids)
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{
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struct MPOpts *opts = mpctx->opts;
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void *tmp = talloc_new(NULL);
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int num_filenames = 0;
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char **filenames = NULL;
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if (*num_sources > 1) {
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char *main_filename = mpctx->demuxer->filename;
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MP_INFO(mpctx, "This file references data from "
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"other sources.\n");
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if (opts->ordered_chapters_files && opts->ordered_chapters_files[0]) {
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MP_INFO(mpctx, "Loading references from '%s'.\n",
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opts->ordered_chapters_files);
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struct playlist *pl =
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playlist_parse_file(opts->ordered_chapters_files, mpctx->global);
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talloc_steal(tmp, pl);
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for (struct playlist_entry *e = pl->first; e; e = e->next)
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MP_TARRAY_APPEND(tmp, filenames, num_filenames, e->filename);
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} else if (mpctx->demuxer->stream->uncached_type != STREAMTYPE_FILE) {
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MP_WARN(mpctx, "Playback source is not a "
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"normal disk file. Will not search for related files.\n");
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} else {
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MP_INFO(mpctx, "Will scan other files in the "
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"same directory to find referenced sources.\n");
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filenames = find_files(main_filename);
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num_filenames = MP_TALLOC_ELEMS(filenames);
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talloc_steal(tmp, filenames);
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}
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// Possibly get further segments appended to the first segment
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check_file(mpctx, sources, num_sources, uids, main_filename, 1);
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}
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int old_source_count;
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do {
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old_source_count = *num_sources;
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for (int i = 0; i < num_filenames; i++) {
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if (!missing(*sources, *num_sources))
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break;
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MP_INFO(mpctx, "Checking file %s\n", filenames[i]);
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check_file(mpctx, sources, num_sources, uids, filenames[i], 0);
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}
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/* Loop while we have new sources to look for. */
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} while (old_source_count != *num_sources);
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if (missing(*sources, *num_sources)) {
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MP_ERR(mpctx, "Failed to find ordered chapter part!\n"
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"There will be parts MISSING from the video!\n");
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int j = 1;
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for (int i = 1; i < *num_sources; i++)
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if ((*sources)[i]) {
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struct matroska_segment_uid *source_uid = *uids + i;
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struct matroska_segment_uid *target_uid = *uids + j;
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(*sources)[j] = (*sources)[i];
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memmove(target_uid, source_uid, sizeof(*source_uid));
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j++;
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}
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*num_sources = j;
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}
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talloc_free(tmp);
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return *num_sources;
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}
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static int64_t add_timeline_part(struct MPContext *mpctx,
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struct demuxer *source,
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struct timeline_part **timeline,
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int *part_count,
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uint64_t start,
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uint64_t *last_end_time,
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uint64_t *starttime)
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{
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/* Only add a separate part if the time or file actually changes.
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* Matroska files have chapter divisions that are redundant from
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* timeline point of view because the same chapter structure is used
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* both to specify the timeline and for normal chapter information.
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* Removing a missing inserted external chapter can also cause this.
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* We allow for a configurable fudge factor because of files which
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* specify chapter end times that are one frame too early;
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* we don't want to try seeking over a one frame gap. */
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int64_t join_diff = start - *last_end_time;
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if (*part_count == 0
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|| FFABS(join_diff) > mpctx->opts->chapter_merge_threshold * 1e6
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|| source != (*timeline)[*part_count - 1].source) {
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struct timeline_part new = {
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.start = *starttime / 1e9,
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.source_start = start / 1e9,
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.source = source,
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};
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MP_TARRAY_APPEND(NULL, *timeline, *part_count, new);
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} else if (*part_count > 0 && join_diff) {
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/* Chapter was merged at an inexact boundary;
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* adjust timestamps to match. */
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MP_VERBOSE(mpctx, "Merging timeline part %d with "
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"offset %g ms.\n", *part_count, join_diff / 1e6);
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*starttime += join_diff;
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return join_diff;
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}
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return 0;
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}
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static void account_missing_time(struct MPContext *mpctx,
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uint64_t *total_time,
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uint64_t new_time,
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const char *message)
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{
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if (!new_time)
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return;
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*total_time += new_time;
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MP_INFO(mpctx, "missing %"PRIu64" nanoseconds: %s\n",
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new_time, message);
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}
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static void build_timeline_loop(struct MPContext *mpctx,
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struct demuxer **sources,
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int num_sources,
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int current_source,
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uint64_t *starttime,
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uint64_t *missing_time,
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uint64_t *last_end_time,
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struct timeline_part **timeline,
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struct chapter *chapters,
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int *part_count,
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uint64_t skip,
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uint64_t limit)
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{
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uint64_t local_starttime = 0;
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struct demuxer *source = sources[current_source];
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struct matroska_data *m = &source->matroska_data;
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for (int i = 0; i < m->num_ordered_chapters; i++) {
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struct matroska_chapter *c = m->ordered_chapters + i;
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uint64_t chapter_length = c->end - c->start;
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/* Fill in the uid with the current one if one isn't requested. */
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if (!c->has_segment_uid)
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memcpy(&c->uid, &m->uid, sizeof(c->uid));
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/* "Seek" to the end of the chapter. */
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local_starttime += chapter_length;
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/* If we're before the start time for the chapter, skip to the next
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* one. */
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if (local_starttime <= skip)
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continue;
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/* Look for the source for this chapter. */
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for (int j = 0; j < num_sources; j++) {
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struct demuxer *linked_source = sources[j];
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struct matroska_data *linked_m = &linked_source->matroska_data;
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/* Skip if the segment or edition isn't acceptable. */
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if (!demux_matroska_uid_cmp(&c->uid, &linked_m->uid))
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continue;
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/* TODO: Add option to support recursive chapters when loading
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* recursive ordered chapter editions? If so, more code will be
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* needed to add chapters for external non-ordered segment loading
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* as well since that part is not recursive. */
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if (!limit) {
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chapters[i].start = *starttime / 1e9;
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chapters[i].name = talloc_strdup(chapters, c->name);
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}
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/* If we're the source or it's a non-ordered edition reference,
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* just add a timeline part from the source. */
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if (current_source == j || !linked_m->num_ordered_chapters) {
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double source_full_length_seconds = demuxer_get_time_length(linked_source);
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/* Some accuracy lost, but not enough to care. (Over one
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* million parts, a nanosecond off here could add up to a
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* millisecond and trigger a false-positive error message, but
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* if that's your biggest problem at that point,
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* congratulations. */
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uint64_t source_full_length = source_full_length_seconds * 1e9;
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uint64_t source_length = source_full_length - c->start;
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int64_t join_diff = 0;
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/* If the chapter starts after the end of a source, there's
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* nothing we can get from it. Instead, mark the entire chapter
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* as missing and make the chapter length 0. */
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if (source_full_length <= c->start) {
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account_missing_time(mpctx, missing_time, chapter_length,
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"referenced segment ends before the requested start time");
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chapter_length = 0;
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goto found;
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}
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/* If the source length starting at the chapter start is
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* shorter than the chapter it is supposed to fill, add the gap
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* to missing_time. Also, modify the chapter length to be what
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* we actually have to avoid playing off the end of the file
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* and not switching to the next source. */
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if (source_length < chapter_length) {
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account_missing_time(mpctx, missing_time, chapter_length - source_length,
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"referenced segment ends before the requested end time");
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chapter_length = source_length;
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}
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join_diff = add_timeline_part(mpctx, linked_source, timeline, part_count,
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c->start, last_end_time, starttime);
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/* If we merged two chapters into a single part due to them
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* being off by a few frames, we need to change the limit to
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* avoid chopping the end of the intended chapter (the adding
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* frames case) or showing extra content (the removing frames
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* case). Also update chapter_length to incorporate the extra
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* time. */
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if (limit) {
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limit += join_diff;
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chapter_length += join_diff;
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}
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/* Otherwise, we have an ordered edition as the source. Since this
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* can jump around all over the place, we need to build up the
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* timeline parts for each of its chapters, but not add them as
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* chapters. */
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} else {
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build_timeline_loop(mpctx, sources, num_sources, j, starttime,
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missing_time, last_end_time, timeline,
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chapters, part_count, c->start, c->end);
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/* The loop call has added time as needed (we can't add it here
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* due to 'join_diff' in the add_timeline_part function. Since
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* the time has already been added as needed, the chapter has
|
|
* an effective 0 length at this point. */
|
|
chapter_length = 0;
|
|
}
|
|
*last_end_time = c->end;
|
|
goto found;
|
|
}
|
|
|
|
/* We're missing a part of the chapter, so add it to the accounting. */
|
|
account_missing_time(mpctx, missing_time, chapter_length,
|
|
"the source for a chapter could not be found");
|
|
/* We don't have the source, but don't leave a gap in the timeline for
|
|
* the source. */
|
|
chapter_length = 0;
|
|
found:;
|
|
*starttime += chapter_length;
|
|
/* If we're after the limit on this chapter, stop here. */
|
|
if (limit && local_starttime >= limit) {
|
|
/* Back up the global start time by the overflow. */
|
|
*starttime -= local_starttime - limit;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* If we stopped before the limit, add up the missing time. */
|
|
if (local_starttime < limit)
|
|
account_missing_time(mpctx, missing_time, limit - local_starttime,
|
|
"nested ordered chapter segment is shorter than the requested end time");
|
|
}
|
|
|
|
void build_ordered_chapter_timeline(struct MPContext *mpctx)
|
|
{
|
|
struct MPOpts *opts = mpctx->opts;
|
|
|
|
if (!opts->ordered_chapters) {
|
|
MP_INFO(mpctx, "File uses ordered chapters, but "
|
|
"you have disabled support for them. Ignoring.\n");
|
|
return;
|
|
}
|
|
|
|
MP_INFO(mpctx, "File uses ordered chapters, will build "
|
|
"edit timeline.\n");
|
|
|
|
struct demuxer *demuxer = mpctx->demuxer;
|
|
struct matroska_data *m = &demuxer->matroska_data;
|
|
|
|
// +1 because sources/uid_map[0] is original file even if all chapters
|
|
// actually use other sources and need separate entries
|
|
struct demuxer **sources = talloc_zero_array(NULL, struct demuxer *,
|
|
m->num_ordered_chapters+1);
|
|
sources[0] = mpctx->demuxer;
|
|
struct matroska_segment_uid *uids =
|
|
talloc_zero_array(NULL, struct matroska_segment_uid,
|
|
m->num_ordered_chapters + 1);
|
|
int num_sources = 1;
|
|
memcpy(uids[0].segment, m->uid.segment, 16);
|
|
uids[0].edition = 0;
|
|
|
|
for (int i = 0; i < m->num_ordered_chapters; i++) {
|
|
struct matroska_chapter *c = m->ordered_chapters + i;
|
|
/* If there isn't a segment uid, we are the source. If the segment uid
|
|
* is our segment uid and the edition matches. We can't accept the
|
|
* "don't care" edition value of 0 since the user may have requested a
|
|
* non-default edition. */
|
|
if (!c->has_segment_uid || demux_matroska_uid_cmp(&c->uid, &m->uid))
|
|
continue;
|
|
|
|
if (has_source_request(uids, num_sources, &c->uid))
|
|
continue;
|
|
|
|
memcpy(uids + num_sources, &c->uid, sizeof(c->uid));
|
|
sources[num_sources] = NULL;
|
|
num_sources++;
|
|
}
|
|
|
|
num_sources = find_ordered_chapter_sources(mpctx, &sources, &num_sources,
|
|
&uids);
|
|
talloc_free(uids);
|
|
|
|
struct timeline_part *timeline = talloc_array_ptrtype(NULL, timeline, 0);
|
|
struct chapter *chapters =
|
|
talloc_zero_array(NULL, struct chapter, m->num_ordered_chapters);
|
|
uint64_t starttime = 0;
|
|
uint64_t missing_time = 0;
|
|
uint64_t last_end_time = 0;
|
|
int part_count = 0;
|
|
build_timeline_loop(mpctx, sources, num_sources, 0, &starttime,
|
|
&missing_time, &last_end_time, &timeline,
|
|
chapters, &part_count, 0, 0);
|
|
|
|
if (!part_count) {
|
|
// None of the parts come from the file itself???
|
|
talloc_free(sources);
|
|
talloc_free(timeline);
|
|
talloc_free(chapters);
|
|
return;
|
|
}
|
|
|
|
struct timeline_part new = {
|
|
.start = starttime / 1e9,
|
|
};
|
|
MP_TARRAY_APPEND(NULL, timeline, part_count, new);
|
|
|
|
/* Ignore anything less than a millisecond when reporting missing time. If
|
|
* users really notice less than a millisecond missing, maybe this can be
|
|
* revisited. */
|
|
if (missing_time >= 1e6)
|
|
MP_ERR(mpctx, "There are %.3f seconds missing "
|
|
"from the timeline!\n", missing_time / 1e9);
|
|
talloc_free(mpctx->sources);
|
|
mpctx->sources = sources;
|
|
mpctx->num_sources = num_sources;
|
|
mpctx->timeline = timeline;
|
|
mpctx->num_timeline_parts = part_count - 1;
|
|
mpctx->num_chapters = m->num_ordered_chapters;
|
|
mpctx->chapters = chapters;
|
|
}
|