sidplay: new decoder plugin for playing C64 SID files

src/decoder/sidplay_plugin.cxx

@@ -0,0 +1,161 @@
+/*
+ * Copyright (C) 2003-2009 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+extern "C" {
+#include "../decoder_api.h"
+}
+
+#include <glib.h>
+
+#include <sidplay/sidplay2.h>
+#include <sidplay/builders/resid.h>
+
+#undef G_LOG_DOMAIN
+#define G_LOG_DOMAIN "sidplay"
+
+static void
+sidplay_file_decode(struct decoder *decoder, const char *path_fs)
+{
+	int ret;
+
+	/* load the tune */
+
+	SidTune tune(path_fs, NULL, true);
+	if (!tune) {
+		g_warning("failed to load file");
+		return;
+	}
+
+	tune.selectSong(1);
+
+	/* initialize the player */
+
+	sidplay2 player;
+	int iret = player.load(&tune);
+	if (iret != 0) {
+		g_warning("sidplay2.load() failed: %s", player.error());
+		return;
+	}
+
+	/* initialize the builder */
+
+	ReSIDBuilder builder("ReSID");
+	if (!builder) {
+		g_warning("failed to initialize ReSIDBuilder");
+		return;
+	}
+
+	builder.create(player.info().maxsids);
+	if (!builder) {
+		g_warning("ReSIDBuilder.create() failed");
+		return;
+	}
+
+	builder.filter(false);
+	if (!builder) {
+		g_warning("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.playback = sid2_stereo;
+	config.precision = 16;
+	config.sidDefault = SID2_MOS6581;
+	config.sidEmulation = &builder;
+	config.sidModel = SID2_MODEL_CORRECT;
+	config.sidSamples = true;
+#if G_BYTE_ORDER == G_LITTLE_ENDIAN
+	config.sampleFormat = SID2_LITTLE_SIGNED;
+#else
+	config.sampleFormat = SID2_BIG_SIGNED;
+#endif
+
+	iret = player.config(config);
+	if (iret != 0) {
+		g_warning("sidplay2.config() failed: %s", player.error());
+		return;
+	}
+
+	/* initialize the MPD decoder */
+
+	struct audio_format audio_format;
+	audio_format.sample_rate = 48000;
+	audio_format.bits = 16;
+	audio_format.channels = 2;
+
+	decoder_initialized(decoder, &audio_format, false, -1);
+
+	/* .. and play */
+
+	enum decoder_command cmd;
+	do {
+		char buffer[4096];
+		size_t nbytes;
+
+		nbytes = player.play(buffer, sizeof(buffer));
+		if (nbytes == 0)
+			break;
+
+		cmd = decoder_data(decoder, NULL, buffer, nbytes,
+				   0, 0, NULL);
+	} while (cmd == DECODE_COMMAND_NONE);
+}
+
+static struct tag *
+sidplay_tag_dup(const char *path_fs)
+{
+	SidTune tune(path_fs, NULL, true);
+	if (!tune)
+		return NULL;
+
+	const SidTuneInfo &info = tune.getInfo();
+	struct tag *tag = tag_new();
+
+	if (info.numberOfInfoStrings > 0 && info.infoString[0] != NULL)
+		tag_add_item(tag, TAG_ITEM_TITLE, info.infoString[0]);
+
+	if (info.numberOfInfoStrings > 1 && info.infoString[1] != NULL)
+		tag_add_item(tag, TAG_ITEM_ARTIST, info.infoString[1]);
+
+	return tag;
+}
+
+static const char *const sidplay_suffixes[] = {
+	"sid",
+	NULL
+};
+
+extern const struct decoder_plugin sidplay_decoder_plugin;
+const struct decoder_plugin sidplay_decoder_plugin = {
+	"sidplay",
+	NULL, /* init() */
+	NULL, /* finish() */
+	NULL, /* stream_decode() */
+	sidplay_file_decode,
+	sidplay_tag_dup,
+	sidplay_suffixes,
+	NULL, /* mime_types */
+};