renamed decode.c to decoder_thread.c

It should be obvious in which thread or context a function is being
executed at runtime.  The code which was left in decode.c is for the
decoder thread itself; give the file a better name.

src/decoder_thread.c

@@ -0,0 +1,199 @@
+/* the Music Player Daemon (MPD)
+ * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
+ * Copyright (C) 2008 Max Kellermann <max@duempel.org>
+ * This project's homepage is: 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
+ */
+
+#include "decoder_thread.h"
+#include "decode.h"
+#include "decoder_internal.h"
+#include "player.h"
+
+#include "path.h"
+#include "log.h"
+#include "ls.h"
+
+static void decodeStart(void)
+{
+	struct decoder decoder;
+	int ret;
+	int close_instream = 1;
+	InputStream inStream;
+	struct decoder_plugin *plugin = NULL;
+	char path_max_fs[MPD_PATH_MAX];
+	char path_max_utf8[MPD_PATH_MAX];
+
+	if (!get_song_url(path_max_utf8, dc.next_song)) {
+		dc.error = DECODE_ERROR_FILE;
+		goto stop_no_close;
+	}
+	if (!isRemoteUrl(path_max_utf8)) {
+		rmp2amp_r(path_max_fs,
+		          utf8_to_fs_charset(path_max_fs, path_max_utf8));
+	} else
+		pathcpy_trunc(path_max_fs, path_max_utf8);
+
+	dc.current_song = dc.next_song; /* NEED LOCK */
+	if (openInputStream(&inStream, path_max_fs) < 0) {
+		dc.error = DECODE_ERROR_FILE;
+		goto stop_no_close;
+	}
+
+	decoder.seeking = 0;
+
+	dc.state = DECODE_STATE_START;
+	dc.command = DECODE_COMMAND_NONE;
+
+	/* wait for the input stream to become ready; its metadata
+	   will be available then */
+
+	while (!inStream.ready) {
+		if (dc.command != DECODE_COMMAND_NONE)
+			goto stop;
+
+		ret = bufferInputStream(&inStream);
+		if (ret < 0)
+			goto stop;
+	}
+
+	/* for http streams, seekable is determined in bufferInputStream */
+	dc.seekable = inStream.seekable;
+
+	if (dc.command == DECODE_COMMAND_STOP)
+		goto stop;
+
+	ret = DECODE_ERROR_UNKTYPE;
+	if (isRemoteUrl(path_max_utf8)) {
+		unsigned int next = 0;
+
+		/* first we try mime types: */
+		while (ret && (plugin = decoder_plugin_from_mime_type(inStream.mime, next++))) {
+			if (!plugin->stream_decode_func)
+				continue;
+			if (!(plugin->stream_types & INPUT_PLUGIN_STREAM_URL))
+				continue;
+			if (plugin->try_decode_func
+			    && !plugin->try_decode_func(&inStream))
+				continue;
+			ret = plugin->stream_decode_func(&decoder, &inStream);
+			break;
+		}
+
+		/* if that fails, try suffix matching the URL: */
+		if (plugin == NULL) {
+			const char *s = getSuffix(path_max_utf8);
+			next = 0;
+			while (ret && (plugin = decoder_plugin_from_suffix(s, next++))) {
+				if (!plugin->stream_decode_func)
+					continue;
+				if (!(plugin->stream_types &
+				      INPUT_PLUGIN_STREAM_URL))
+					continue;
+				if (plugin->try_decode_func &&
+				    !plugin->try_decode_func(&inStream))
+					continue;
+				decoder.plugin = plugin;
+				ret = plugin->stream_decode_func(&decoder,
+								 &inStream);
+				break;
+			}
+		}
+		/* fallback to mp3: */
+		/* this is needed for bastard streams that don't have a suffix
+		   or set the mimeType */
+		if (plugin == NULL) {
+			/* we already know our mp3Plugin supports streams, no
+			 * need to check for stream{Types,DecodeFunc} */
+			if ((plugin = decoder_plugin_from_name("mp3"))) {
+				decoder.plugin = plugin;
+				ret = plugin->stream_decode_func(&decoder,
+								 &inStream);
+			}
+		}
+	} else {
+		unsigned int next = 0;
+		const char *s = getSuffix(path_max_utf8);
+		while (ret && (plugin = decoder_plugin_from_suffix(s, next++))) {
+			if (!plugin->stream_types & INPUT_PLUGIN_STREAM_FILE)
+				continue;
+
+			if (plugin->try_decode_func &&
+			    !plugin->try_decode_func(&inStream))
+				continue;
+
+			if (plugin->file_decode_func) {
+				closeInputStream(&inStream);
+				close_instream = 0;
+				decoder.plugin = plugin;
+				ret = plugin->file_decode_func(&decoder,
+							       path_max_fs);
+				break;
+			} else if (plugin->stream_decode_func) {
+				decoder.plugin = plugin;
+				ret = plugin->stream_decode_func(&decoder,
+								 &inStream);
+				break;
+			}
+		}
+	}
+
+	if (ret < 0 || ret == DECODE_ERROR_UNKTYPE) {
+		if (ret != DECODE_ERROR_UNKTYPE)
+			dc.error = DECODE_ERROR_FILE;
+		else
+			dc.error = DECODE_ERROR_UNKTYPE;
+	}
+
+stop:
+	if (close_instream)
+		closeInputStream(&inStream);
+stop_no_close:
+	dc.state = DECODE_STATE_STOP;
+	dc.command = DECODE_COMMAND_NONE;
+}
+
+static void * decoder_task(mpd_unused void *arg)
+{
+	notify_enter(&dc.notify);
+
+	while (1) {
+		assert(dc.state == DECODE_STATE_STOP);
+
+		if (dc.command == DECODE_COMMAND_START ||
+		    dc.command == DECODE_COMMAND_SEEK) {
+			decodeStart();
+		} else if (dc.command == DECODE_COMMAND_STOP) {
+			dc.command = DECODE_COMMAND_NONE;
+			notify_signal(&pc.notify);
+		} else {
+			notify_wait(&dc.notify);
+			notify_signal(&pc.notify);
+		}
+	}
+
+	return NULL;
+}
+
+void decoderInit(void)
+{
+	pthread_attr_t attr;
+	pthread_t decoder_thread;
+
+	pthread_attr_init(&attr);
+	pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+	if (pthread_create(&decoder_thread, &attr, decoder_task, NULL))
+		FATAL("Failed to spawn decoder task: %s\n", strerror(errno));
+}