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mpv/demux/demux_libarchive.c
wm4 1b283f6b60 libarchive: some shitty hack to make opening slightly faster
See manpage additions. The libarchive behavior mentioned in the last
paragraph there is technically unrelated, but makes this new option
mostly pointless.

See: #7182
2020-01-04 19:56:09 +01:00

121 lines
3.4 KiB
C

/*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it 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.
*
* 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include <archive.h>
#include <archive_entry.h>
#include "common/common.h"
#include "common/playlist.h"
#include "options/m_config.h"
#include "stream/stream.h"
#include "misc/natural_sort.h"
#include "demux.h"
#include "stream/stream_libarchive.h"
struct demux_libarchive_opts {
int rar_list_all_volumes;
};
static int cmp_filename(const void *a, const void *b)
{
return mp_natural_sort_cmp(*(char **)a, *(char **)b);
}
static int open_file(struct demuxer *demuxer, enum demux_check check)
{
if (!demuxer->access_references)
return -1;
int flags = 0;
int probe_size = STREAM_BUFFER_SIZE;
if (check <= DEMUX_CHECK_REQUEST) {
flags |= MP_ARCHIVE_FLAG_UNSAFE;
probe_size *= 100;
}
void *probe = ta_alloc_size(NULL, probe_size);
if (!probe)
return -1;
int probe_got = stream_read_peek(demuxer->stream, probe, probe_size);
struct stream *probe_stream =
stream_memory_open(demuxer->global, probe, probe_got);
struct mp_archive *mpa = mp_archive_new(mp_null_log, probe_stream, flags, 0);
bool ok = !!mpa;
free_stream(probe_stream);
mp_archive_free(mpa);
ta_free(probe);
if (!ok)
return -1;
struct demux_libarchive_opts *opts =
mp_get_config_group(demuxer, demuxer->global, demuxer->desc->options);
if (!opts->rar_list_all_volumes)
flags |= MP_ARCHIVE_FLAG_NO_RAR_VOLUMES;
mpa = mp_archive_new(demuxer->log, demuxer->stream, flags, 0);
if (!mpa)
return -1;
struct playlist *pl = talloc_zero(demuxer, struct playlist);
demuxer->playlist = pl;
char *prefix = mp_url_escape(mpa, demuxer->stream->url, "~|");
char **files = NULL;
int num_files = 0;
while (mp_archive_next_entry(mpa)) {
// stream_libarchive.c does the real work
char *f = talloc_asprintf(mpa, "archive://%s|/%s", prefix,
mpa->entry_filename);
MP_TARRAY_APPEND(mpa, files, num_files, f);
}
if (files)
qsort(files, num_files, sizeof(files[0]), cmp_filename);
for (int n = 0; n < num_files; n++)
playlist_add_file(pl, files[n]);
playlist_set_stream_flags(pl, demuxer->stream_origin);
demuxer->filetype = "archive";
demuxer->fully_read = true;
mp_archive_free(mpa);
demux_close_stream(demuxer);
return 0;
}
#define OPT_BASE_STRUCT struct demux_libarchive_opts
const struct demuxer_desc demuxer_desc_libarchive = {
.name = "libarchive",
.desc = "libarchive wrapper",
.open = open_file,
.options = &(const struct m_sub_options){
.opts = (const struct m_option[]) {
OPT_FLAG("rar-list-all-volumes", rar_list_all_volumes, 0),
{0}
},
.size = sizeof(OPT_BASE_STRUCT),
},
};