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🎥 Command line media player
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114/* * 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 *family, const char *codec, const char *decoder, const char *desc){ struct mp_decoder_entry entry = { .family = talloc_strdup(list, family), .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->family, 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; } if (bstr_find0(entry, ":") >= 0) { mp_err(log, "Codec family selection was removed. " "Pass the codec name directly.\n"); 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");}