diff options
Diffstat (limited to 'common/codecs.c')
| -rw-r--r-- | common/codecs.c | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/common/codecs.c b/common/codecs.c new file mode 100644 index 0000000..8101b50 --- /dev/null +++ b/common/codecs.c @@ -0,0 +1,107 @@ +/* + * 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 <assert.h> +#include "mpv_talloc.h" +#include "misc/bstr.h" +#include "common/msg.h" +#include "codecs.h" + +void mp_add_decoder(struct mp_decoder_list *list, const char *codec, + const char *decoder, const char *desc) +{ + struct mp_decoder_entry entry = { + .codec = talloc_strdup(list, codec), + .decoder = talloc_strdup(list, decoder), + .desc = talloc_strdup(list, desc), + }; + MP_TARRAY_APPEND(list, list->entries, list->num_entries, entry); +} + +// Add entry, but only if it's not yet on the list, and if the codec matches. +// If codec == NULL, don't compare codecs. +static void add_new(struct mp_decoder_list *to, struct mp_decoder_entry *entry, + const char *codec) +{ + if (!entry || (codec && strcmp(entry->codec, codec) != 0)) + return; + mp_add_decoder(to, entry->codec, entry->decoder, entry->desc); +} + +// Select a decoder from the given list for the given codec. The selection +// can be influenced by the selection string, which can specify a priority +// list of preferred decoders. +// This returns a list of decoders to try, with the preferred decoders first. +// The selection string corresponds to --vd/--ad directly, and has the +// following syntax: +// selection = [<entry> ("," <entry>)*] +// entry = <decoder> // prefer decoder +// entry = "-" <decoder> // exclude a decoder +// entry = "-" // don't add fallback decoders +// Forcing a decoder means it's added even if the codec mismatches. +struct mp_decoder_list *mp_select_decoders(struct mp_log *log, + struct mp_decoder_list *all, + const char *codec, + const char *selection) +{ + struct mp_decoder_list *list = talloc_zero(NULL, struct mp_decoder_list); + if (!codec) + codec = "unknown"; + bool stop = false; + bstr sel = bstr0(selection); + while (sel.len) { + bstr entry; + bstr_split_tok(sel, ",", &entry, &sel); + if (bstr_equals0(entry, "-")) { + mp_warn(log, "Excluding codecs is deprecated.\n"); + stop = true; + break; + } + for (int n = 0; n < all->num_entries; n++) { + struct mp_decoder_entry *cur = &all->entries[n]; + if (bstr_equals0(entry, cur->decoder)) + add_new(list, cur, codec); + } + } + if (!stop) { + // Add the remaining codecs which haven't been added yet + for (int n = 0; n < all->num_entries; n++) + add_new(list, &all->entries[n], codec); + } + return list; +} + +void mp_append_decoders(struct mp_decoder_list *list, struct mp_decoder_list *a) +{ + for (int n = 0; n < a->num_entries; n++) + add_new(list, &a->entries[n], NULL); +} + +void mp_print_decoders(struct mp_log *log, int msgl, const char *header, + struct mp_decoder_list *list) +{ + mp_msg(log, msgl, "%s\n", header); + for (int n = 0; n < list->num_entries; n++) { + struct mp_decoder_entry *entry = &list->entries[n]; + mp_msg(log, msgl, " %s", entry->decoder); + if (strcmp(entry->decoder, entry->codec) != 0) + mp_msg(log, msgl, " (%s)", entry->codec); + mp_msg(log, msgl, " - %s\n", entry->desc); + } + if (list->num_entries == 0) + mp_msg(log, msgl, " (no decoders)\n"); +} |