1 files changed, 439 insertions, 0 deletions
diff --git a/src/decoder/plugins/SidplayDecoderPlugin.cxx b/src/decoder/plugins/SidplayDecoderPlugin.cxx
new file mode 100644
index 000000000..8435f095f
--- /dev/null
+++ b/src/decoder/plugins/SidplayDecoderPlugin.cxx
@@ -0,0 +1,439 @@
+/*
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "SidplayDecoderPlugin.hxx"
+#include "../DecoderAPI.hxx"
+#include "tag/TagHandler.hxx"
+#include "fs/Path.hxx"
+#include "util/FormatString.hxx"
+#include "util/Domain.hxx"
+#include "system/ByteOrder.hxx"
+#include "Log.hxx"
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <glib.h>
+
+#include <sidplay/sidplay2.h>
+#include <sidplay/builders/resid.h>
+#include <sidplay/utils/SidTuneMod.h>
+
+#define SUBTUNE_PREFIX "tune_"
+
+static constexpr Domain sidplay_domain("sidplay");
+
+static GPatternSpec *path_with_subtune;
+static const char *songlength_file;
+static GKeyFile *songlength_database;
+
+static bool all_files_are_containers;
+static unsigned default_songlength;
+
+static bool filter_setting;
+
+static GKeyFile *
+sidplay_load_songlength_db(const char *path)
+{
+	GError *error = nullptr;
+	gchar *data;
+	gsize size;
+
+	if (!g_file_get_contents(path, &data, &size, &error)) {
+		FormatError(sidplay_domain,
+			    "unable to read songlengths file %s: %s",
+			    path, error->message);
+		g_error_free(error);
+		return nullptr;
+	}
+
+	/* replace any ; comment characters with # */
+	for (gsize i = 0; i < size; i++)
+		if (data[i] == ';')
+			data[i] = '#';
+
+	GKeyFile *db = g_key_file_new();
+	bool success = g_key_file_load_from_data(db, data, size,
+						 G_KEY_FILE_NONE, &error);
+	g_free(data);
+	if (!success) {
+		FormatError(sidplay_domain,
+			    "unable to parse songlengths file %s: %s",
+			    path, error->message);
+		g_error_free(error);
+		g_key_file_free(db);
+		return nullptr;
+	}
+
+	g_key_file_set_list_separator(db, ' ');
+	return db;
+}
+
+static bool
+sidplay_init(const config_param &param)
+{
+	/* read the songlengths database file */
+	songlength_file = param.GetBlockValue("songlength_database");
+	if (songlength_file != nullptr)
+		songlength_database = sidplay_load_songlength_db(songlength_file);
+
+	default_songlength = param.GetBlockValue("default_songlength", 0u);
+
+	all_files_are_containers =
+		param.GetBlockValue("all_files_are_containers", true);
+
+	path_with_subtune=g_pattern_spec_new(
+			"*/" SUBTUNE_PREFIX "???.sid");
+
+	filter_setting = param.GetBlockValue("filter", true);
+
+	return true;
+}
+
+static void
+sidplay_finish()
+{
+	g_pattern_spec_free(path_with_subtune);
+
+	if(songlength_database)
+		g_key_file_free(songlength_database);
+}
+
+/**
+ * returns the file path stripped of any /tune_xxx.sid subtune
+ * suffix
+ */
+static char *
+get_container_name(Path path_fs)
+{
+	char *path_container = strdup(path_fs.c_str());
+
+	if(!g_pattern_match(path_with_subtune,
+		strlen(path_container), path_container, nullptr))
+		return path_container;
+
+	char *ptr=g_strrstr(path_container, "/" SUBTUNE_PREFIX);
+	if(ptr) *ptr='\0';
+
+	return path_container;
+}
+
+/**
+ * returns tune number from file.sid/tune_xxx.sid style path or 1 if
+ * no subtune is appended
+ */
+static unsigned
+get_song_num(const char *path_fs)
+{
+	if(g_pattern_match(path_with_subtune,
+		strlen(path_fs), path_fs, nullptr)) {
+		char *sub=g_strrstr(path_fs, "/" SUBTUNE_PREFIX);
+		if(!sub) return 1;
+
+		sub+=strlen("/" SUBTUNE_PREFIX);
+		int song_num=strtol(sub, nullptr, 10);
+
+		if (errno == EINVAL)
+			return 1;
+		else
+			return song_num;
+	} else
+		return 1;
+}
+
+/* get the song length in seconds */
+static SignedSongTime
+get_song_length(Path path_fs)
+{
+	if (songlength_database == nullptr)
+		return SignedSongTime::Negative();
+
+	char *sid_file = get_container_name(path_fs);
+	SidTuneMod tune(sid_file);
+	free(sid_file);
+	if(!tune) {
+		LogWarning(sidplay_domain,
+			   "failed to load file for calculating md5 sum");
+		return SignedSongTime::Negative();
+	}
+	char md5sum[SIDTUNE_MD5_LENGTH+1];
+	tune.createMD5(md5sum);
+
+	const unsigned song_num = get_song_num(path_fs.c_str());
+
+	gsize num_items;
+	gchar **values=g_key_file_get_string_list(songlength_database,
+		"Database", md5sum, &num_items, nullptr);
+	if(!values || song_num>num_items) {
+		g_strfreev(values);
+		return SignedSongTime::Negative();
+	}
+
+	int minutes=strtol(values[song_num-1], nullptr, 10);
+	if(errno==EINVAL) minutes=0;
+
+	int seconds;
+	char *ptr=strchr(values[song_num-1], ':');
+	if(ptr) {
+		seconds=strtol(ptr+1, nullptr, 10);
+		if(errno==EINVAL) seconds=0;
+	} else
+		seconds=0;
+
+	g_strfreev(values);
+
+	return SignedSongTime::FromS((minutes * 60) + seconds);
+}
+
+static void
+sidplay_file_decode(Decoder &decoder, Path path_fs)
+{
+	int channels;
+
+	/* load the tune */
+
+	char *path_container=get_container_name(path_fs);
+	SidTune tune(path_container, nullptr, true);
+	free(path_container);
+	if (!tune) {
+		LogWarning(sidplay_domain, "failed to load file");
+		return;
+	}
+
+	const int song_num = get_song_num(path_fs.c_str());
+	tune.selectSong(song_num);
+
+	auto duration = get_song_length(path_fs);
+	if (duration.IsNegative() && default_songlength > 0)
+		duration = SongTime::FromS(default_songlength);
+
+	/* initialize the player */
+
+	sidplay2 player;
+	int iret = player.load(&tune);
+	if (iret != 0) {
+		FormatWarning(sidplay_domain,
+			      "sidplay2.load() failed: %s", player.error());
+		return;
+	}
+
+	/* initialize the builder */
+
+	ReSIDBuilder builder("ReSID");
+	if (!builder) {
+		LogWarning(sidplay_domain,
+			   "failed to initialize ReSIDBuilder");
+		return;
+	}
+
+	builder.create(player.info().maxsids);
+	if (!builder) {
+		LogWarning(sidplay_domain, "ReSIDBuilder.create() failed");
+		return;
+	}
+
+	builder.filter(filter_setting);
+	if (!builder) {
+		LogWarning(sidplay_domain, "ReSIDBuilder.filter() failed");
+		return;
+	}
+
+	/* configure the player */
+
+	sid2_config_t config = player.config();
+
+	config.clockDefault = SID2_CLOCK_PAL;
+	config.clockForced = true;
+	config.clockSpeed = SID2_CLOCK_CORRECT;
+	config.frequency = 48000;
+	config.optimisation = SID2_DEFAULT_OPTIMISATION;
+
+	config.precision = 16;
+	config.sidDefault = SID2_MOS6581;
+	config.sidEmulation = &builder;
+	config.sidModel = SID2_MODEL_CORRECT;
+	config.sidSamples = true;
+	config.sampleFormat = IsLittleEndian()
+		? SID2_LITTLE_SIGNED
+		: SID2_BIG_SIGNED;
+	if (tune.isStereo()) {
+		config.playback = sid2_stereo;
+		channels = 2;
+	} else {
+		config.playback = sid2_mono;
+		channels = 1;
+	}
+
+	iret = player.config(config);
+	if (iret != 0) {
+		FormatWarning(sidplay_domain,
+			      "sidplay2.config() failed: %s", player.error());
+		return;
+	}
+
+	/* initialize the MPD decoder */
+
+	const AudioFormat audio_format(48000, SampleFormat::S16, channels);
+	assert(audio_format.IsValid());
+
+	decoder_initialized(decoder, audio_format, true, duration);
+
+	/* .. and play */
+
+	const unsigned timebase = player.timebase();
+	const unsigned end = duration.IsNegative()
+		? 0u
+		: duration.ToScale<uint64_t>(timebase);
+
+	DecoderCommand cmd;
+	do {
+		char buffer[4096];
+		size_t nbytes;
+
+		nbytes = player.play(buffer, sizeof(buffer));
+		if (nbytes == 0)
+			break;
+
+		decoder_timestamp(decoder, (double)player.time() / timebase);
+
+		cmd = decoder_data(decoder, nullptr, buffer, nbytes, 0);
+
+		if (cmd == DecoderCommand::SEEK) {
+			unsigned data_time = player.time();
+			unsigned target_time =
+				decoder_seek_time(decoder).ToScale(timebase);
+
+			/* can't rewind so return to zero and seek forward */
+			if(target_time<data_time) {
+				player.stop();
+				data_time=0;
+			}
+
+			/* ignore data until target time is reached */
+			while(data_time<target_time) {
+				nbytes=player.play(buffer, sizeof(buffer));
+				if(nbytes==0)
+					break;
+				data_time = player.time();
+			}
+
+			decoder_command_finished(decoder);
+		}
+
+		if (end > 0 && player.time() >= end)
+			break;
+
+	} while (cmd != DecoderCommand::STOP);
+}
+
+static bool
+sidplay_scan_file(Path path_fs,
+		  const struct tag_handler *handler, void *handler_ctx)
+{
+	const int song_num = get_song_num(path_fs.c_str());
+	char *path_container=get_container_name(path_fs);
+
+	SidTune tune(path_container, nullptr, true);
+	free(path_container);
+	if (!tune)
+		return false;
+
+	const SidTuneInfo &info = tune.getInfo();
+
+	/* title */
+	const char *title;
+	if (info.numberOfInfoStrings > 0 && info.infoString[0] != nullptr)
+		title=info.infoString[0];
+	else
+		title="";
+
+	if(info.songs>1) {
+		char tag_title[1024];
+		snprintf(tag_title, sizeof(tag_title),
+			 "%s (%d/%d)",
+			 title, song_num, info.songs);
+		tag_handler_invoke_tag(handler, handler_ctx,
+				       TAG_TITLE, tag_title);
+	} else
+		tag_handler_invoke_tag(handler, handler_ctx, TAG_TITLE, title);
+
+	/* artist */
+	if (info.numberOfInfoStrings > 1 && info.infoString[1] != nullptr)
+		tag_handler_invoke_tag(handler, handler_ctx, TAG_ARTIST,
+				       info.infoString[1]);
+
+	/* track */
+	char track[16];
+	sprintf(track, "%d", song_num);
+	tag_handler_invoke_tag(handler, handler_ctx, TAG_TRACK, track);
+
+	/* time */
+	const auto duration = get_song_length(path_fs);
+	if (!duration.IsNegative())
+		tag_handler_invoke_duration(handler, handler_ctx,
+					    SongTime(duration));
+
+	return true;
+}
+
+static char *
+sidplay_container_scan(Path path_fs, const unsigned int tnum)
+{
+	SidTune tune(path_fs.c_str(), nullptr, true);
+	if (!tune)
+		return nullptr;
+
+	const SidTuneInfo &info=tune.getInfo();
+
+	/* Don't treat sids containing a single tune
+		as containers */
+	if(!all_files_are_containers && info.songs<2)
+		return nullptr;
+
+	/* Construct container/tune path names, eg.
+		Delta.sid/tune_001.sid */
+	if(tnum<=info.songs) {
+		return FormatNew(SUBTUNE_PREFIX "%03u.sid", tnum);
+	} else
+		return nullptr;
+}
+
+static const char *const sidplay_suffixes[] = {
+	"sid",
+	"mus",
+	"str",
+	"prg",
+	"P00",
+	nullptr
+};
+
+extern const struct DecoderPlugin sidplay_decoder_plugin;
+const struct DecoderPlugin sidplay_decoder_plugin = {
+	"sidplay",
+	sidplay_init,
+	sidplay_finish,
+	nullptr, /* stream_decode() */
+	sidplay_file_decode,
+	sidplay_scan_file,
+	nullptr, /* stream_tag() */
+	sidplay_container_scan,
+	sidplay_suffixes,
+	nullptr, /* mime_types */
+};