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-rw-r--r--src/PlaylistState.cxx236
1 files changed, 236 insertions, 0 deletions
diff --git a/src/PlaylistState.cxx b/src/PlaylistState.cxx
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index 000000000..14c6d231e
--- /dev/null
+++ b/src/PlaylistState.cxx
@@ -0,0 +1,236 @@
+/*
+ * Copyright (C) 2003-2013 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.
+ */
+
+/*
+ * Saving and loading the playlist to/from the state file.
+ *
+ */
+
+#include "config.h"
+#include "PlaylistState.hxx"
+#include "Playlist.hxx"
+#include "QueueSave.hxx"
+#include "TextFile.hxx"
+#include "PlayerControl.hxx"
+#include "conf.h"
+
+#include <string.h>
+#include <stdlib.h>
+
+#define PLAYLIST_STATE_FILE_STATE "state: "
+#define PLAYLIST_STATE_FILE_RANDOM "random: "
+#define PLAYLIST_STATE_FILE_REPEAT "repeat: "
+#define PLAYLIST_STATE_FILE_SINGLE "single: "
+#define PLAYLIST_STATE_FILE_CONSUME "consume: "
+#define PLAYLIST_STATE_FILE_CURRENT "current: "
+#define PLAYLIST_STATE_FILE_TIME "time: "
+#define PLAYLIST_STATE_FILE_CROSSFADE "crossfade: "
+#define PLAYLIST_STATE_FILE_MIXRAMPDB "mixrampdb: "
+#define PLAYLIST_STATE_FILE_MIXRAMPDELAY "mixrampdelay: "
+#define PLAYLIST_STATE_FILE_PLAYLIST_BEGIN "playlist_begin"
+#define PLAYLIST_STATE_FILE_PLAYLIST_END "playlist_end"
+
+#define PLAYLIST_STATE_FILE_STATE_PLAY "play"
+#define PLAYLIST_STATE_FILE_STATE_PAUSE "pause"
+#define PLAYLIST_STATE_FILE_STATE_STOP "stop"
+
+#define PLAYLIST_BUFFER_SIZE 2*MPD_PATH_MAX
+
+void
+playlist_state_save(FILE *fp, const struct playlist *playlist,
+ struct player_control *pc)
+{
+ struct player_status player_status;
+
+ pc_get_status(pc, &player_status);
+
+ fputs(PLAYLIST_STATE_FILE_STATE, fp);
+
+ if (playlist->playing) {
+ switch (player_status.state) {
+ case PLAYER_STATE_PAUSE:
+ fputs(PLAYLIST_STATE_FILE_STATE_PAUSE "\n", fp);
+ break;
+ default:
+ fputs(PLAYLIST_STATE_FILE_STATE_PLAY "\n", fp);
+ }
+ fprintf(fp, PLAYLIST_STATE_FILE_CURRENT "%i\n",
+ playlist->queue.OrderToPosition(playlist->current));
+ fprintf(fp, PLAYLIST_STATE_FILE_TIME "%i\n",
+ (int)player_status.elapsed_time);
+ } else {
+ fputs(PLAYLIST_STATE_FILE_STATE_STOP "\n", fp);
+
+ if (playlist->current >= 0)
+ fprintf(fp, PLAYLIST_STATE_FILE_CURRENT "%i\n",
+ playlist->queue.OrderToPosition(playlist->current));
+ }
+
+ fprintf(fp, PLAYLIST_STATE_FILE_RANDOM "%i\n", playlist->queue.random);
+ fprintf(fp, PLAYLIST_STATE_FILE_REPEAT "%i\n", playlist->queue.repeat);
+ fprintf(fp, PLAYLIST_STATE_FILE_SINGLE "%i\n", playlist->queue.single);
+ fprintf(fp, PLAYLIST_STATE_FILE_CONSUME "%i\n",
+ playlist->queue.consume);
+ fprintf(fp, PLAYLIST_STATE_FILE_CROSSFADE "%i\n",
+ (int)(pc_get_cross_fade(pc)));
+ fprintf(fp, PLAYLIST_STATE_FILE_MIXRAMPDB "%f\n",
+ pc_get_mixramp_db(pc));
+ fprintf(fp, PLAYLIST_STATE_FILE_MIXRAMPDELAY "%f\n",
+ pc_get_mixramp_delay(pc));
+ fputs(PLAYLIST_STATE_FILE_PLAYLIST_BEGIN "\n", fp);
+ queue_save(fp, &playlist->queue);
+ fputs(PLAYLIST_STATE_FILE_PLAYLIST_END "\n", fp);
+}
+
+static void
+playlist_state_load(TextFile &file, struct playlist *playlist)
+{
+ const char *line = file.ReadLine();
+ if (line == NULL) {
+ g_warning("No playlist in state file");
+ return;
+ }
+
+ while (!g_str_has_prefix(line, PLAYLIST_STATE_FILE_PLAYLIST_END)) {
+ queue_load_song(file, line, &playlist->queue);
+
+ line = file.ReadLine();
+ if (line == NULL) {
+ g_warning("'" PLAYLIST_STATE_FILE_PLAYLIST_END
+ "' not found in state file");
+ break;
+ }
+ }
+
+ playlist->queue.IncrementVersion();
+}
+
+bool
+playlist_state_restore(const char *line, TextFile &file,
+ struct playlist *playlist, struct player_control *pc)
+{
+ int current = -1;
+ int seek_time = 0;
+ enum player_state state = PLAYER_STATE_STOP;
+ bool random_mode = false;
+
+ if (!g_str_has_prefix(line, PLAYLIST_STATE_FILE_STATE))
+ return false;
+
+ line += sizeof(PLAYLIST_STATE_FILE_STATE) - 1;
+
+ if (strcmp(line, PLAYLIST_STATE_FILE_STATE_PLAY) == 0)
+ state = PLAYER_STATE_PLAY;
+ else if (strcmp(line, PLAYLIST_STATE_FILE_STATE_PAUSE) == 0)
+ state = PLAYER_STATE_PAUSE;
+
+ while ((line = file.ReadLine()) != NULL) {
+ if (g_str_has_prefix(line, PLAYLIST_STATE_FILE_TIME)) {
+ seek_time =
+ atoi(&(line[strlen(PLAYLIST_STATE_FILE_TIME)]));
+ } else if (g_str_has_prefix(line, PLAYLIST_STATE_FILE_REPEAT)) {
+ playlist->SetRepeat(*pc,
+ strcmp(&(line[strlen(PLAYLIST_STATE_FILE_REPEAT)]),
+ "1") == 0);
+ } else if (g_str_has_prefix(line, PLAYLIST_STATE_FILE_SINGLE)) {
+ playlist->SetSingle(*pc,
+ strcmp(&(line[strlen(PLAYLIST_STATE_FILE_SINGLE)]),
+ "1") == 0);
+ } else if (g_str_has_prefix(line, PLAYLIST_STATE_FILE_CONSUME)) {
+ playlist->SetConsume(strcmp(&(line[strlen(PLAYLIST_STATE_FILE_CONSUME)]),
+ "1") == 0);
+ } else if (g_str_has_prefix(line, PLAYLIST_STATE_FILE_CROSSFADE)) {
+ pc_set_cross_fade(pc,
+ atoi(line + strlen(PLAYLIST_STATE_FILE_CROSSFADE)));
+ } else if (g_str_has_prefix(line, PLAYLIST_STATE_FILE_MIXRAMPDB)) {
+ pc_set_mixramp_db(pc,
+ atof(line + strlen(PLAYLIST_STATE_FILE_MIXRAMPDB)));
+ } else if (g_str_has_prefix(line, PLAYLIST_STATE_FILE_MIXRAMPDELAY)) {
+ pc_set_mixramp_delay(pc,
+ atof(line + strlen(PLAYLIST_STATE_FILE_MIXRAMPDELAY)));
+ } else if (g_str_has_prefix(line, PLAYLIST_STATE_FILE_RANDOM)) {
+ random_mode =
+ strcmp(line + strlen(PLAYLIST_STATE_FILE_RANDOM),
+ "1") == 0;
+ } else if (g_str_has_prefix(line, PLAYLIST_STATE_FILE_CURRENT)) {
+ current = atoi(&(line
+ [strlen
+ (PLAYLIST_STATE_FILE_CURRENT)]));
+ } else if (g_str_has_prefix(line,
+ PLAYLIST_STATE_FILE_PLAYLIST_BEGIN)) {
+ playlist_state_load(file, playlist);
+ }
+ }
+
+ playlist->SetRandom(*pc, random_mode);
+
+ if (!playlist->queue.IsEmpty()) {
+ if (!playlist->queue.IsValidPosition(current))
+ current = 0;
+
+ if (state == PLAYER_STATE_PLAY &&
+ config_get_bool("restore_paused", false))
+ /* the user doesn't want MPD to auto-start
+ playback after startup; fall back to
+ "pause" */
+ state = PLAYER_STATE_PAUSE;
+
+ /* enable all devices for the first time; this must be
+ called here, after the audio output states were
+ restored, before playback begins */
+ if (state != PLAYER_STATE_STOP)
+ pc_update_audio(pc);
+
+ if (state == PLAYER_STATE_STOP /* && config_option */)
+ playlist->current = current;
+ else if (seek_time == 0)
+ playlist->PlayPosition(*pc, current);
+ else
+ playlist->SeekSongPosition(*pc, current, seek_time);
+
+ if (state == PLAYER_STATE_PAUSE)
+ pc_pause(pc);
+ }
+
+ return true;
+}
+
+unsigned
+playlist_state_get_hash(const struct playlist *playlist,
+ struct player_control *pc)
+{
+ struct player_status player_status;
+
+ pc_get_status(pc, &player_status);
+
+ return playlist->queue.version ^
+ (player_status.state != PLAYER_STATE_STOP
+ ? ((int)player_status.elapsed_time << 8)
+ : 0) ^
+ (playlist->current >= 0
+ ? (playlist->queue.OrderToPosition(playlist->current) << 16)
+ : 0) ^
+ ((int)pc_get_cross_fade(pc) << 20) ^
+ (player_status.state << 24) ^
+ (playlist->queue.random << 27) ^
+ (playlist->queue.repeat << 28) ^
+ (playlist->queue.single << 29) ^
+ (playlist->queue.consume << 30) ^
+ (playlist->queue.random << 31);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-27 03:51:28 +0000