decoder/*: move to decoder/plugins/
This commit is contained in:
Max Kellermann
436
src/decoder/plugins/SidplayDecoderPlugin.cxx
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436
src/decoder/plugins/SidplayDecoderPlugin.cxx
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/*
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* Copyright (C) 2003-2014 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program 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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* This program 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 this program; 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 "config.h"
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#include "SidplayDecoderPlugin.hxx"
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#include "../DecoderAPI.hxx"
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#include "tag/TagHandler.hxx"
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#include "util/Alloc.hxx"
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#include "util/Domain.hxx"
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#include "system/ByteOrder.hxx"
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#include "Log.hxx"
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <glib.h>
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#include <sidplay/sidplay2.h>
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#include <sidplay/builders/resid.h>
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#include <sidplay/utils/SidTuneMod.h>
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#define SUBTUNE_PREFIX "tune_"
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static constexpr Domain sidplay_domain("sidplay");
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static GPatternSpec *path_with_subtune;
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static const char *songlength_file;
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static GKeyFile *songlength_database;
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static bool all_files_are_containers;
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static unsigned default_songlength;
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static bool filter_setting;
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static GKeyFile *
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sidplay_load_songlength_db(const char *path)
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{
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GError *error = nullptr;
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gchar *data;
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gsize size;
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if (!g_file_get_contents(path, &data, &size, &error)) {
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FormatError(sidplay_domain,
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"unable to read songlengths file %s: %s",
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path, error->message);
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g_error_free(error);
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return nullptr;
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}
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/* replace any ; comment characters with # */
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for (gsize i = 0; i < size; i++)
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if (data[i] == ';')
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data[i] = '#';
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GKeyFile *db = g_key_file_new();
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bool success = g_key_file_load_from_data(db, data, size,
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G_KEY_FILE_NONE, &error);
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g_free(data);
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if (!success) {
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FormatError(sidplay_domain,
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"unable to parse songlengths file %s: %s",
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path, error->message);
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g_error_free(error);
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g_key_file_free(db);
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return nullptr;
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}
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g_key_file_set_list_separator(db, ' ');
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return db;
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}
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static bool
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sidplay_init(const config_param ¶m)
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{
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/* read the songlengths database file */
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songlength_file = param.GetBlockValue("songlength_database");
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if (songlength_file != nullptr)
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songlength_database = sidplay_load_songlength_db(songlength_file);
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default_songlength = param.GetBlockValue("default_songlength", 0u);
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all_files_are_containers =
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param.GetBlockValue("all_files_are_containers", true);
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path_with_subtune=g_pattern_spec_new(
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"*/" SUBTUNE_PREFIX "???.sid");
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filter_setting = param.GetBlockValue("filter", true);
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return true;
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}
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static void
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sidplay_finish()
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{
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g_pattern_spec_free(path_with_subtune);
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if(songlength_database)
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g_key_file_free(songlength_database);
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}
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/**
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* returns the file path stripped of any /tune_xxx.sid subtune
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* suffix
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*/
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static char *
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get_container_name(const char *path_fs)
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{
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char *path_container = strdup(path_fs);
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if(!g_pattern_match(path_with_subtune,
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strlen(path_container), path_container, nullptr))
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return path_container;
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char *ptr=g_strrstr(path_container, "/" SUBTUNE_PREFIX);
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if(ptr) *ptr='\0';
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return path_container;
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}
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/**
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* returns tune number from file.sid/tune_xxx.sid style path or 1 if
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* no subtune is appended
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*/
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static unsigned
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get_song_num(const char *path_fs)
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{
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if(g_pattern_match(path_with_subtune,
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strlen(path_fs), path_fs, nullptr)) {
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char *sub=g_strrstr(path_fs, "/" SUBTUNE_PREFIX);
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if(!sub) return 1;
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sub+=strlen("/" SUBTUNE_PREFIX);
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int song_num=strtol(sub, nullptr, 10);
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if (errno == EINVAL)
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return 1;
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else
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return song_num;
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} else
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return 1;
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}
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/* get the song length in seconds */
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static int
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get_song_length(const char *path_fs)
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{
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if (songlength_database == nullptr)
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return -1;
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char *sid_file = get_container_name(path_fs);
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SidTuneMod tune(sid_file);
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free(sid_file);
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if(!tune) {
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LogWarning(sidplay_domain,
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"failed to load file for calculating md5 sum");
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return -1;
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}
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char md5sum[SIDTUNE_MD5_LENGTH+1];
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tune.createMD5(md5sum);
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const unsigned song_num = get_song_num(path_fs);
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gsize num_items;
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gchar **values=g_key_file_get_string_list(songlength_database,
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"Database", md5sum, &num_items, nullptr);
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if(!values || song_num>num_items) {
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g_strfreev(values);
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return -1;
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}
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int minutes=strtol(values[song_num-1], nullptr, 10);
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if(errno==EINVAL) minutes=0;
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int seconds;
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char *ptr=strchr(values[song_num-1], ':');
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if(ptr) {
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seconds=strtol(ptr+1, nullptr, 10);
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if(errno==EINVAL) seconds=0;
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} else
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seconds=0;
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g_strfreev(values);
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return (minutes*60)+seconds;
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}
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static void
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sidplay_file_decode(Decoder &decoder, const char *path_fs)
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{
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int channels;
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/* load the tune */
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char *path_container=get_container_name(path_fs);
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SidTune tune(path_container, nullptr, true);
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free(path_container);
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if (!tune) {
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LogWarning(sidplay_domain, "failed to load file");
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return;
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}
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int song_num=get_song_num(path_fs);
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tune.selectSong(song_num);
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int song_len=get_song_length(path_fs);
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if(song_len==-1) song_len=default_songlength;
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/* initialize the player */
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sidplay2 player;
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int iret = player.load(&tune);
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if (iret != 0) {
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FormatWarning(sidplay_domain,
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"sidplay2.load() failed: %s", player.error());
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return;
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}
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/* initialize the builder */
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ReSIDBuilder builder("ReSID");
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if (!builder) {
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LogWarning(sidplay_domain,
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"failed to initialize ReSIDBuilder");
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return;
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}
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builder.create(player.info().maxsids);
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if (!builder) {
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LogWarning(sidplay_domain, "ReSIDBuilder.create() failed");
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return;
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}
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builder.filter(filter_setting);
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if (!builder) {
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LogWarning(sidplay_domain, "ReSIDBuilder.filter() failed");
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return;
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}
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/* configure the player */
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sid2_config_t config = player.config();
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config.clockDefault = SID2_CLOCK_PAL;
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config.clockForced = true;
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config.clockSpeed = SID2_CLOCK_CORRECT;
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config.frequency = 48000;
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config.optimisation = SID2_DEFAULT_OPTIMISATION;
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config.precision = 16;
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config.sidDefault = SID2_MOS6581;
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config.sidEmulation = &builder;
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config.sidModel = SID2_MODEL_CORRECT;
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config.sidSamples = true;
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config.sampleFormat = IsLittleEndian()
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? SID2_LITTLE_SIGNED
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: SID2_BIG_SIGNED;
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if (tune.isStereo()) {
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config.playback = sid2_stereo;
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channels = 2;
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} else {
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config.playback = sid2_mono;
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channels = 1;
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}
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iret = player.config(config);
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if (iret != 0) {
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FormatWarning(sidplay_domain,
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"sidplay2.config() failed: %s", player.error());
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return;
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}
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/* initialize the MPD decoder */
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const AudioFormat audio_format(48000, SampleFormat::S16, channels);
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assert(audio_format.IsValid());
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decoder_initialized(decoder, audio_format, true, (float)song_len);
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/* .. and play */
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const unsigned timebase = player.timebase();
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song_len *= timebase;
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DecoderCommand cmd;
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do {
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char buffer[4096];
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size_t nbytes;
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nbytes = player.play(buffer, sizeof(buffer));
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if (nbytes == 0)
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break;
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decoder_timestamp(decoder, (double)player.time() / timebase);
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cmd = decoder_data(decoder, nullptr, buffer, nbytes, 0);
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if (cmd == DecoderCommand::SEEK) {
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unsigned data_time = player.time();
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unsigned target_time = (unsigned)
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(decoder_seek_where(decoder) * timebase);
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/* can't rewind so return to zero and seek forward */
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if(target_time<data_time) {
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player.stop();
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data_time=0;
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}
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/* ignore data until target time is reached */
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while(data_time<target_time) {
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nbytes=player.play(buffer, sizeof(buffer));
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if(nbytes==0)
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break;
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data_time = player.time();
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}
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decoder_command_finished(decoder);
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}
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if (song_len > 0 && player.time() >= (unsigned)song_len)
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break;
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} while (cmd != DecoderCommand::STOP);
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}
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static bool
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sidplay_scan_file(const char *path_fs,
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const struct tag_handler *handler, void *handler_ctx)
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{
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int song_num=get_song_num(path_fs);
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char *path_container=get_container_name(path_fs);
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SidTune tune(path_container, nullptr, true);
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free(path_container);
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if (!tune)
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return false;
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const SidTuneInfo &info = tune.getInfo();
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/* title */
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const char *title;
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if (info.numberOfInfoStrings > 0 && info.infoString[0] != nullptr)
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title=info.infoString[0];
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else
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title="";
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if(info.songs>1) {
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char tag_title[1024];
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snprintf(tag_title, sizeof(tag_title),
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"%s (%d/%d)",
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title, song_num, info.songs);
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tag_handler_invoke_tag(handler, handler_ctx,
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TAG_TITLE, tag_title);
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} else
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tag_handler_invoke_tag(handler, handler_ctx, TAG_TITLE, title);
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/* artist */
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if (info.numberOfInfoStrings > 1 && info.infoString[1] != nullptr)
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tag_handler_invoke_tag(handler, handler_ctx, TAG_ARTIST,
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info.infoString[1]);
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/* track */
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char track[16];
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sprintf(track, "%d", song_num);
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tag_handler_invoke_tag(handler, handler_ctx, TAG_TRACK, track);
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/* time */
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int song_len=get_song_length(path_fs);
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if (song_len >= 0)
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tag_handler_invoke_duration(handler, handler_ctx, song_len);
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return true;
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}
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static char *
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sidplay_container_scan(const char *path_fs, const unsigned int tnum)
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{
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SidTune tune(path_fs, nullptr, true);
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if (!tune)
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return nullptr;
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const SidTuneInfo &info=tune.getInfo();
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/* Don't treat sids containing a single tune
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as containers */
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if(!all_files_are_containers && info.songs<2)
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return nullptr;
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/* Construct container/tune path names, eg.
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Delta.sid/tune_001.sid */
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if(tnum<=info.songs) {
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char *subtune= g_strdup_printf(
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SUBTUNE_PREFIX "%03u.sid", tnum);
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return subtune;
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} else
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return nullptr;
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}
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static const char *const sidplay_suffixes[] = {
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"sid",
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"mus",
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"str",
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"prg",
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"P00",
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nullptr
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};
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extern const struct DecoderPlugin sidplay_decoder_plugin;
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const struct DecoderPlugin sidplay_decoder_plugin = {
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"sidplay",
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sidplay_init,
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sidplay_finish,
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nullptr, /* stream_decode() */
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sidplay_file_decode,
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sidplay_scan_file,
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nullptr, /* stream_tag() */
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sidplay_container_scan,
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sidplay_suffixes,
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nullptr, /* mime_types */
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};
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