C++ BarUiMsg函数代码示例

/*	get initial station from autostart setting or user input
 */
static void BarMainGetInitialStation (BarApp_t *app) {
	/* try to get autostart station */
	if (app->settings.autostartStation != NULL) {
		app->curStation = PianoFindStationById (app->ph.stations,
				app->settings.autostartStation);
		if (app->curStation == NULL) {
			BarUiMsg (&app->settings, MSG_ERR,
					"Error: Autostart station not found.\n");
		}
	}
	/* no autostart? ask the user */
	if (app->curStation == NULL) {
		app->curStation = BarUiSelectStation (app, "Select station: ", NULL);
	}
	if (app->curStation != NULL) {
		BarUiPrintStation (&app->settings, app->curStation);
	}
}

/*	Print song infos (artist, title, album, loved)
 *	@param pianobar settings
 *	@param the song
 *	@param alternative station info (show real station for quickmix, e.g.)
 */
void BarUiPrintSong (const BarSettings_t *settings,
		const PianoSong_t *song, const PianoStation_t *station) {
	char outstr[512];
	const char *vals[] = {song->title, song->artist, song->album,
			(song->rating == PIANO_RATE_LOVE) ? settings->loveIcon : "",
			station != NULL ? settings->atIcon : "",
			station != NULL ? station->name : "",
			song->detailUrl};

	BarUiCustomFormat (outstr, sizeof (outstr), settings->npSongFormat,
			"[email protected]", vals);
	BarUiAppendNewline (outstr, sizeof (outstr));
	BarUiMsg (settings, MSG_PLAYING, "%s", outstr);

	BarUiCustomFormat(outstr, sizeof(outstr), settings->titleFormat,
		"[email protected]", vals);
	BarConsoleSetTitle(outstr);
}

/*	start new player thread
 */
static void BarMainStartPlayback (BarApp_t *app, pthread_t *playerThread) {
	assert (app != NULL);
	assert (playerThread != NULL);

	const PianoSong_t * const curSong = app->playlist;
	assert (curSong != NULL);

	BarUiPrintSong (&app->settings, curSong, app->curStation->isQuickMix ?
			PianoFindStationById (app->ph.stations,
			curSong->stationId) : NULL);

	static const char httpPrefix[] = "http://";
	/* avoid playing local files */
	if (curSong->audioUrl == NULL ||
			strncmp (curSong->audioUrl, httpPrefix, strlen (httpPrefix)) != 0) {
		BarUiMsg (&app->settings, MSG_ERR, "Invalid song url.\n");
	} else {
		/* setup player */
		memset (&app->player, 0, sizeof (app->player));

		app->player.url = curSong->audioUrl;
		app->player.gain = curSong->fileGain;
		app->player.settings = &app->settings;
		app->player.songDuration = curSong->length;
		pthread_mutex_init (&app->player.pauseMutex, NULL);
		pthread_cond_init (&app->player.pauseCond, NULL);

		assert (interrupted == &app->doQuit);
		interrupted = &app->player.interrupted;

		/* throw event */
		BarUiStartEventCmd (&app->settings, "songstart",
				app->curStation, curSong, &app->player, app->ph.stations,
				PIANO_RET_OK, CURLE_OK);

		/* prevent race condition, mode must _not_ be DEAD if
		 * thread has been started */
		app->player.mode = PLAYER_WAITING;
		/* start player */
		pthread_create (playerThread, NULL, BarPlayerThread,
				&app->player);
	}
}

/*	start new player thread
 */
static void BarMainStartPlayback (BarApp_t *app, pthread_t *playerThread) {
	BarUiPrintSong (&app->settings, app->playlist, app->curStation->isQuickMix ?
			PianoFindStationById (app->ph.stations,
			app->playlist->stationId) : NULL);

	if (app->playlist->audioUrl == NULL) {
		BarUiMsg (&app->settings, MSG_ERR, "Invalid song url.\n");
	} else {
		/* setup player */
		memset (&app->player, 0, sizeof (app->player));

		WaitressInit (&app->player.waith);
		WaitressSetUrl (&app->player.waith, app->playlist->audioUrl);

		/* set up global proxy, player is NULLed on songfinish */
		if (app->settings.proxy != NULL) {
			WaitressSetProxy (&app->player.waith, app->settings.proxy);
		}

		app->player.gain = app->playlist->fileGain;
		if ( !app->mute ) {
			app->player.scale = BarPlayerCalcScale (app->player.gain + app->settings.volume);
		}
		app->player.audioFormat = app->playlist->audioFormat;
		app->player.settings = &app->settings;
		pthread_mutex_init (&app->player.pauseMutex, NULL);
		pthread_cond_init (&app->player.pauseCond, NULL);

		/* throw event */
		BarUiStartEventCmd (&app->settings, "songstart",
				app->curStation, app->playlist, &app->player, app->ph.stations,
				PIANO_RET_OK, WAITRESS_RET_OK);

        BarDownloadStart(app);

		/* prevent race condition, mode must _not_ be FREED if
		 * thread has been started */
		app->player.mode = PLAYER_STARTING;
		/* start player */
		pthread_create (playerThread, NULL, BarPlayerThread,
				&app->player);
	}
}

/*	setup libao
 */
static bool openDevice (player_t * const player) {
	AVCodecContext * const cctx = player->st->codec;

	ao_sample_format aoFmt;
	memset (&aoFmt, 0, sizeof (aoFmt));
	aoFmt.bits = av_get_bytes_per_sample (avformat) * 8;
	assert (aoFmt.bits > 0);
	aoFmt.channels = cctx->channels;
	aoFmt.rate = cctx->sample_rate;
	aoFmt.byte_format = AO_FMT_NATIVE;

	int driver = ao_default_driver_id ();
	if ((player->aoDev = ao_open_live (driver, &aoFmt, NULL)) == NULL) {
		BarUiMsg (player->settings, MSG_ERR, "Cannot open audio device.\n");
		return false;
	}

	return true;
}

static int _BarFlyTagFetchCover(uint8_t** cover_art, size_t* cover_size,
		char const* url, BarSettings_t const* settings)
{
	int exit_status = 0;
	int status;
	uint8_t* tmp_cover_art = NULL;
	size_t tmp_cover_size;

	assert(cover_art != NULL);
	assert(cover_size != NULL);
	assert(url != NULL);
	assert(settings != NULL);

	/*
	 * Fetch the cover art.
	 */
	status = _BarFlyFetchURL(url, &tmp_cover_art, &tmp_cover_size, settings);
	if (status != 0) {
		BarUiMsg(settings, MSG_ERR, "Could not get the cover art.\n");
		goto error;
	}

	*cover_art = tmp_cover_art;
	tmp_cover_art = NULL;
	*cover_size = tmp_cover_size;

	goto end;

error:
	exit_status = -1;

end:
	if (tmp_cover_art != NULL) {
		free(tmp_cover_art);
	}

	return exit_status;
}

/*	let user pick one song
 *	@param pianobar settings
 *	@param song list
 *	@param input fds
 *	@return pointer to selected item in song list or NULL
 */
PianoSong_t *BarUiSelectSong (const BarSettings_t *settings,
		PianoSong_t *startSong, BarReadlineFds_t *input) {
	PianoSong_t *tmpSong = NULL;
	char buf[100];

	memset (buf, 0, sizeof (buf));

	do {
		BarUiListSongs (settings, startSong, buf);

		BarUiMsg (settings, MSG_QUESTION, "Select song: ");
		if (BarReadlineStr (buf, sizeof (buf), input, BAR_RL_DEFAULT) == 0) {
			return NULL;
		}

		if (isnumeric (buf)) {
			unsigned long i = strtoul (buf, NULL, 0);
			tmpSong = PianoListGetP (startSong, i);
		}
	} while (tmpSong == NULL);

	return tmpSong;
}

int main (int argc, char **argv) {
	static BarApp_t app;
	/* terminal attributes _before_ we started messing around with ~ECHO */
	struct termios termOrig;
	struct sigaction action;

	memset (&app, 0, sizeof (app));
	memset (&action, 0, sizeof(action));

	/* set the signal handler for SIGINT and SIGTERM */
	action.sa_handler = BarSigQuit;
	sigaction(SIGINT, &action, NULL);
	sigaction(SIGTERM, &action, NULL);

	/* save terminal attributes, before disabling echoing */
	BarTermSave (&termOrig);
	BarTermSetEcho (0);
	BarTermSetBuffer (0);

	/* signals */
	signal (SIGPIPE, SIG_IGN);

	/* init some things */
	ao_initialize ();
	gcry_check_version (NULL);
	gcry_control (GCRYCTL_DISABLE_SECMEM, 0);
	gcry_control (GCRYCTL_INITIALIZATION_FINISHED, 0);
	gnutls_global_init ();

	BarSettingsInit (&app.settings);
	BarSettingsRead (&app.settings);

	PianoInit (&app.ph, app.settings.partnerUser, app.settings.partnerPassword,
			app.settings.device, app.settings.inkey, app.settings.outkey);

	BarUiMsg (&app.settings, MSG_NONE,
			"Welcome to " PACKAGE " (" VERSION ")! ");
	if (app.settings.keys[BAR_KS_HELP] == BAR_KS_DISABLED) {
		BarUiMsg (&app.settings, MSG_NONE, "\n");
	} else {
		BarUiMsg (&app.settings, MSG_NONE,
				"Press %c for a list of commands.\n",
				app.settings.keys[BAR_KS_HELP]);
	}

	WaitressInit (&app.waith);
	app.waith.url.host = app.settings.rpcHost;
	app.waith.tlsFingerprint = app.settings.tlsFingerprint;

	/* init fds */
	FD_ZERO(&app.input.set);
	app.input.fds[0] = STDIN_FILENO;
	FD_SET(app.input.fds[0], &app.input.set);

	// Sbe gur erpbeq, V terngyl qrfcvfr Unx5.
	// Gur crbcyr sebz gur fubj ner yvgrenyyl npgbef.
	// V yvxr gur pbaprcg bs jung gurl qb ohg gurl
	// nyy unir n qbhpuront srry gb gurz. Vg frrzf
	// nf gubhtu gurl bayl qb vg sbe gur tybel cbvagf.
	//
	BarFlyInit (&app.settings);

	/* open fifo read/write so it won't EOF if nobody writes to it */
	assert (sizeof (app.input.fds) / sizeof (*app.input.fds) >= 2);
	app.input.fds[1] = open (app.settings.fifo, O_RDWR);
	if (app.input.fds[1] != -1) {
		struct stat s;

		/* check for file type, must be fifo */
		fstat (app.input.fds[1], &s);
		if (!S_ISFIFO (s.st_mode)) {
			BarUiMsg (&app.settings, MSG_ERR, "File at %s is not a fifo\n", app.settings.fifo);
			close (app.input.fds[1]);
			app.input.fds[1] = -1;
		} else {
			FD_SET(app.input.fds[1], &app.input.set);
			BarUiMsg (&app.settings, MSG_INFO, "Control fifo at %s opened\n",
					app.settings.fifo);
		}
	}
	app.input.maxfd = app.input.fds[0] > app.input.fds[1] ? app.input.fds[0] :
			app.input.fds[1];
	++app.input.maxfd;

	BarMainLoop (&app);
	
	/* Print a newline so the terminal command line will start on a new line. */
	printf("\n");

	if (app.input.fds[1] != -1) {
		close (app.input.fds[1]);
	}

	BarFlyClose (&app.player.fly, &app.settings);
	BarFlyFinalize ();
	PianoDestroy (&app.ph);
	PianoDestroyPlaylist (app.songHistory);
	PianoDestroyPlaylist (app.playlist);
	WaitressFree (&app.waith);
	ao_shutdown();
//.........这里部分代码省略.........

static int _BarFlyFileDelete(BarFly_t const* fly,
		BarSettings_t const* settings)
{
	int exit_status = 0;
	int status;
	char* dir_path = NULL;
	char* ptr;

	assert(fly != NULL);
	assert(settings != NULL);

	if (fly->audio_file_path != NULL) {
		/*
		 * Delete the file.
		 */
		BarUiMsg(settings, MSG_DEBUG, "Deleting partially recorded file (%s).\n",
				fly->audio_file_path);
		status = unlink(fly->audio_file_path);
		if (status != 0) {
			BarUiMsg(settings, MSG_ERR, "Failed to delete the partially "
					"recorded file (%s).\n", fly->audio_file_path);
			goto error;
		}

		/*
		 * Delete any empty parent directories.
		 */
		dir_path = strdup(fly->audio_file_path);
		if (dir_path == NULL) {
			BarUiMsg(settings, MSG_ERR,
					"Error copying the file path (%s) (%d:%s).\n",
					fly->audio_file_path, errno, strerror(errno));
			goto error;
		}

		ptr = strrchr(dir_path, '/');
		while (ptr != NULL) {
			*ptr = '\0';

			status = rmdir(dir_path);
			if ((status != 0) && (errno != ENOTEMPTY) && (errno != EEXIST)) {
				BarUiMsg(settings, MSG_ERR,
						"Failed to delete the empty artist directory "
						"(%s) (%d:%s).\n", dir_path, errno, strerror);
				goto error;

			}

			ptr = strrchr(dir_path, '/');
		}
	}

	goto end;

error:
	exit_status = -1;

end:
	if (dir_path != NULL) {
		free(dir_path);
	}

	return exit_status;
}

/*	browse genre stations and create shared station
 *	@param app handle
 */
void BarStationFromGenre (BarApp_t *app) {
	PianoReturn_t pRet;
	WaitressReturn_t wRet;
	PianoGenreCategory_t *curCat;
	PianoGenre_t *curGenre;
	int i;

	/* receive genre stations list if not yet available */
	if (app->ph.genreStations == NULL) {
		BarUiMsg (&app->settings, MSG_INFO, "Receiving genre stations... ");
		if (!BarUiPianoCall (app, PIANO_REQUEST_GET_GENRE_STATIONS, NULL,
				&pRet, &wRet)) {
			return;
		}
	}

	/* print all available categories */
	curCat = app->ph.genreStations;
	i = 0;
	while (curCat != NULL) {
		BarUiMsg (&app->settings, MSG_LIST, "%2i) %s\n", i, curCat->name);
		i++;
		curCat = curCat->next;
	}

	do {
		/* select category or exit */
		BarUiMsg (&app->settings, MSG_QUESTION, "Select category: ");
		if (BarReadlineInt (&i, &app->input) == 0) {
			return;
		}
		curCat = app->ph.genreStations;
		while (curCat != NULL && i > 0) {
			curCat = curCat->next;
			i--;
		}
	} while (curCat == NULL);
	
	/* print all available stations */
	curGenre = curCat->genres;
	i = 0;
	while (curGenre != NULL) {
		BarUiMsg (&app->settings, MSG_LIST, "%2i) %s\n", i, curGenre->name);
		i++;
		curGenre = curGenre->next;
	}

	do {
		BarUiMsg (&app->settings, MSG_QUESTION, "Select genre: ");
		if (BarReadlineInt (&i, &app->input) == 0) {
			return;
		}
		curGenre = curCat->genres;
		while (curGenre != NULL && i > 0) {
			curGenre = curGenre->next;
			i--;
		}
	} while (curGenre == NULL);

	/* create station */
	PianoRequestDataCreateStation_t reqData;
	reqData.token = curGenre->musicId;
	reqData.type = PIANO_MUSICTYPE_INVALID;
	BarUiMsg (&app->settings, MSG_INFO, "Adding shared station \"%s\"... ", curGenre->name);
	BarUiPianoCall (app, PIANO_REQUEST_CREATE_STATION, &reqData, &pRet, &wRet);
}

/*	let user pick one station
 *	@param app handle
 *	@param stations that should be listed
 *	@param prompt string
 *	@param called if input was not a number
 *	@param auto-select if only one station remains after filtering
 *	@return pointer to selected station or NULL
 */
PianoStation_t *BarUiSelectStation (BarApp_t *app, PianoStation_t *stations,
		const char *prompt, BarUiSelectStationCallback_t callback,
		bool autoselect) {
	PianoStation_t **sortedStations = NULL, *retStation = NULL;
	size_t stationCount, i, lastDisplayed, displayCount;
	char buf[100];

	if (stations == NULL) {
		BarUiMsg (&app->settings, MSG_ERR, "No station available.\n");
		return NULL;
	}

	memset (buf, 0, sizeof (buf));

	/* sort and print stations */
	sortedStations = BarSortedStations (stations, &stationCount,
			app->settings.sortOrder);

	do {
		displayCount = 0;
		for (i = 0; i < stationCount; i++) {
			const PianoStation_t *currStation = sortedStations[i];
			/* filter stations */
			if (BarStrCaseStr (currStation->name, buf) != NULL) {
				BarUiMsg (&app->settings, MSG_LIST, "%2i) %c%c%c %s\n", i,
						currStation->useQuickMix ? 'q' : ' ',
						currStation->isQuickMix ? 'Q' : ' ',
						!currStation->isCreator ? 'S' : ' ',
						currStation->name);
				++displayCount;
				lastDisplayed = i;
			}
		}

		BarUiMsg (&app->settings, MSG_QUESTION, prompt);
		if (autoselect && displayCount == 1 && stationCount != 1) {
			/* auto-select last remaining station */
			BarUiMsg (&app->settings, MSG_NONE, "%i\n", lastDisplayed);
			retStation = sortedStations[lastDisplayed];
		} else {
			if (BarReadlineStr (buf, sizeof (buf), &app->input,
					BAR_RL_DEFAULT) == 0) {
				break;
			}

			if (isnumeric (buf)) {
				unsigned long selected = strtoul (buf, NULL, 0);
				if (selected < stationCount) {
					retStation = sortedStations[selected];
				}
			}

			/* hand over buffer to external function if it was not a station number */
			if (retStation == NULL && callback != NULL) {
				callback (app, buf);
			}
		}
	} while (retStation == NULL);

	free (sortedStations);
	return retStation;
}

/*	ask for username/password if none were provided in settings
 */
static bool BarMainGetLoginCredentials (BarSettings_t *settings,
		BarReadlineFds_t *input) {
	bool usernameFromConfig = true;

	if (settings->username == NULL) {
		char nameBuf[100];

		BarUiMsg (settings, MSG_QUESTION, "No User name in config? Email: ");
		BarReadlineStr (nameBuf, sizeof (nameBuf), input, BAR_RL_DEFAULT);
		settings->username = strdup (nameBuf);
		usernameFromConfig = false;
	}

	if (settings->password == NULL) {
		char passBuf[100];

		if (usernameFromConfig) {
			BarUiMsg (settings, MSG_QUESTION, "Got username Email: %s\n", settings->username);
		}

		if (settings->passwordCmd == NULL) {
			BarUiMsg (settings, MSG_QUESTION, "Password: ");
			BarReadlineStr (passBuf, sizeof (passBuf), input, BAR_RL_NOECHO);
			/* write missing newline */
			puts ("");
			settings->password = strdup (passBuf);
		} else {
			pid_t chld;
			int pipeFd[2];

			BarUiMsg (settings, MSG_INFO, "Requesting password from external helper... ");

			if (pipe (pipeFd) == -1) {
				BarUiMsg (settings, MSG_NONE, "Error: %s\n", strerror (errno));
				return false;
			}

			chld = fork ();
			if (chld == 0) {
				/* child */
				close (pipeFd[0]);
				dup2 (pipeFd[1], fileno (stdout));
				execl ("/bin/sh", "/bin/sh", "-c", settings->passwordCmd, (char *) NULL);
				BarUiMsg (settings, MSG_NONE, "Error: %s\n", strerror (errno));
				close (pipeFd[1]);
				exit (1);
			} else if (chld == -1) {
				BarUiMsg (settings, MSG_NONE, "Error: %s\n", strerror (errno));
				return false;
			} else {
				/* parent */
				int status;

				close (pipeFd[1]);
				memset (passBuf, 0, sizeof (passBuf));
				read (pipeFd[0], passBuf, sizeof (passBuf)-1);
				close (pipeFd[0]);

				/* drop trailing newlines */
				ssize_t len = strlen (passBuf)-1;
				while (len >= 0 && passBuf[len] == '\n') {
					passBuf[len] = '\0';
					--len;
				}

				waitpid (chld, &status, 0);
				if (WEXITSTATUS (status) == 0) {
					settings->password = strdup (passBuf);
					BarUiMsg (settings, MSG_NONE, "Ok.\n");
				} else {
					BarUiMsg (settings, MSG_NONE, "Error: Exit status %i.\n", WEXITSTATUS (status));
					return false;
				}
			}
		} /* end else passwordCmd */
	}

	return true;
}

int main (int argc, char **argv) {
	static BarApp_t app;
	/* terminal attributes _before_ we started messing around with ~ECHO */
	struct termios termOrig;

	memset (&app, 0, sizeof (app));

	/* save terminal attributes, before disabling echoing */
	BarTermSave (&termOrig);
	BarTermSetEcho (0);
	BarTermSetBuffer (0);

	/* signals */
	signal (SIGPIPE, SIG_IGN);

	/* init some things */
	ao_initialize ();
	gcry_check_version (NULL);
	gcry_control (GCRYCTL_DISABLE_SECMEM, 0);
	gcry_control (GCRYCTL_INITIALIZATION_FINISHED, 0);
	gnutls_global_init ();

	BarSettingsInit (&app.settings);
	BarSettingsRead (&app.settings);

	PianoInit (&app.ph, app.settings.partnerUser, app.settings.partnerPassword,
			app.settings.device, app.settings.inkey, app.settings.outkey);

	BarUiMsg (&app.settings, MSG_NONE,
			"Welcome to " PACKAGE " (" VERSION ")! ");
	if (app.settings.keys[BAR_KS_HELP] == BAR_KS_DISABLED) {
		BarUiMsg (&app.settings, MSG_NONE, "\n");
	} else {
		BarUiMsg (&app.settings, MSG_NONE,
				"Press %c for a list of commands.\n",
				app.settings.keys[BAR_KS_HELP]);
	}

	WaitressInit (&app.waith);
	app.waith.url.host = app.settings.rpcHost;
	app.waith.tlsFingerprint = app.settings.tlsFingerprint;

	/* init fds */
	FD_ZERO(&app.input.set);
	app.input.fds[0] = STDIN_FILENO;
	FD_SET(app.input.fds[0], &app.input.set);

	/* open fifo read/write so it won't EOF if nobody writes to it */
	assert (sizeof (app.input.fds) / sizeof (*app.input.fds) >= 2);
	app.input.fds[1] = open (app.settings.fifo, O_RDWR);
	if (app.input.fds[1] != -1) {
		struct stat s;

		/* check for file type, must be fifo */
		fstat (app.input.fds[1], &s);
		if (!S_ISFIFO (s.st_mode)) {
			BarUiMsg (&app.settings, MSG_ERR, "File at %s is not a fifo\n", app.settings.fifo);
			close (app.input.fds[1]);
			app.input.fds[1] = -1;
		} else {
			FD_SET(app.input.fds[1], &app.input.set);
			BarUiMsg (&app.settings, MSG_INFO, "Control fifo at %s opened\n",
					app.settings.fifo);
		}
	}
	app.input.maxfd = app.input.fds[0] > app.input.fds[1] ? app.input.fds[0] :
			app.input.fds[1];
	++app.input.maxfd;

	BarMainLoop (&app);

	if (app.input.fds[1] != -1) {
		close (app.input.fds[1]);
	}

	PianoDestroy (&app.ph);
	PianoDestroyPlaylist (app.songHistory);
	PianoDestroyPlaylist (app.playlist);
	WaitressFree (&app.waith);
	ao_shutdown();
	gnutls_global_deinit ();
	BarSettingsDestroy (&app.settings);

	/* restore terminal attributes, zsh doesn't need this, bash does... */
	BarTermRestore (&termOrig);

	return 0;
}

/*	mp3 playback callback
 */
static WaitressCbReturn_t BarPlayerMp3Cb (void *ptr, size_t size,
		void *stream) {
	const char *data = ptr;
	struct audioPlayer *player = stream;
	size_t i;

	QUIT_PAUSE_CHECK;

	if (!BarPlayerBufferFill (player, data, size)) {
		return WAITRESS_CB_RET_ERR;
	}

	/* some "prebuffering" */
	if (player->mode < PLAYER_RECV_DATA &&
			player->bufferFilled < BAR_PLAYER_BUFSIZE / 2) {
		return WAITRESS_CB_RET_OK;
	}

	mad_stream_buffer (&player->mp3Stream, player->buffer,
			player->bufferFilled);
	player->mp3Stream.error = 0;
	do {
		/* channels * max samples, found in mad.h */
		signed short int madDecoded[2*1152], *madPtr = madDecoded;

		if (mad_frame_decode (&player->mp3Frame, &player->mp3Stream) != 0) {
			if (player->mp3Stream.error != MAD_ERROR_BUFLEN) {
				BarUiMsg (player->settings, MSG_ERR,
						"mp3 decoding error: %s\n",
						mad_stream_errorstr (&player->mp3Stream));
				return WAITRESS_CB_RET_ERR;
			} else {
				/* rebuffering required => exit loop */
				break;
			}
		}
		mad_synth_frame (&player->mp3Synth, &player->mp3Frame);
		for (i = 0; i < player->mp3Synth.pcm.length; i++) {
			/* left channel */
			*(madPtr++) = applyReplayGain (BarPlayerMadToShort (
					player->mp3Synth.pcm.samples[0][i]), player->scale);

			/* right channel */
			*(madPtr++) = applyReplayGain (BarPlayerMadToShort (
					player->mp3Synth.pcm.samples[1][i]), player->scale);
		}
		if (player->mode < PLAYER_AUDIO_INITIALIZED) {
			ao_sample_format format;
			int audioOutDriver;

			player->channels = player->mp3Synth.pcm.channels;
			player->samplerate = player->mp3Synth.pcm.samplerate;
			audioOutDriver = ao_default_driver_id();
			memset (&format, 0, sizeof (format));
			format.bits = 16;
			format.channels = player->channels;
			format.rate = player->samplerate;
			format.byte_format = AO_FMT_NATIVE;
			if ((player->audioOutDevice = ao_open_live (audioOutDriver,
					&format, NULL)) == NULL) {
				player->aoError = 1;
				BarUiMsg (player->settings, MSG_ERR,
						"Cannot open audio device\n");
				return WAITRESS_CB_RET_ERR;
			}

			/* calc song length using the framerate of the first decoded frame */
			player->songDuration = (unsigned long long int) player->waith.request.contentLength /
					((unsigned long long int) player->mp3Frame.header.bitrate /
					(unsigned long long int) BAR_PLAYER_MS_TO_S_FACTOR / 8LL);

			/* must be > PLAYER_SAMPLESIZE_INITIALIZED, otherwise time won't
			 * be visible to user (ugly, but mp3 decoding != aac decoding) */
			player->mode = PLAYER_RECV_DATA;
		}
		/* samples * length * channels */
		ao_play (player->audioOutDevice, (char *) madDecoded,
				player->mp3Synth.pcm.length * 2 * 2);

		/* avoid division by 0 */
		if (player->mode == PLAYER_RECV_DATA) {
			/* same calculation as in aac player; don't need to divide by
			 * channels, length is number of samples for _one_ channel */
			player->songPlayed += (unsigned long long int) player->mp3Synth.pcm.length *
					(unsigned long long int) BAR_PLAYER_MS_TO_S_FACTOR /
					(unsigned long long int) player->samplerate;
		}

		QUIT_PAUSE_CHECK;
	} while (player->mp3Stream.error != MAD_ERROR_BUFLEN);

	player->bufferRead += player->mp3Stream.next_frame - player->buffer;

	BarPlayerBufferMove (player);

	return WAITRESS_CB_RET_OK;
}

static int _BarFlyParseTrackDisc(char const* title, char const* album_xml,
		short unsigned* track_num, short unsigned* disc_num,
		BarSettings_t const* settings)
{
	size_t const MATCH_COUNT = 3;
	size_t const ERROR_MSG_SIZE = 100;

	int exit_status = 0;
	int status;
	char* regex_string = NULL;
	regex_t regex_track;
	regmatch_t match[MATCH_COUNT];
	char error_msg[ERROR_MSG_SIZE];
	char regex_title[BAR_FLY_NAME_LENGTH];
	int index;
	int index2;
	short unsigned track;
	short unsigned disc;

	assert(title != NULL);
	assert(album_xml != NULL);
	assert(track_num != NULL);
	assert(disc_num != NULL);
	assert(settings != NULL);

	memset(&regex_track, 0, sizeof(regex_track));

	/*
	 * Create the regular expression string.
	 * 
	 * The title needs to have all potential regular expresion metacharacters
	 * fixed.  The real correct way to do this would be to escape all of them
	 * with '\'.  But the easy way to it is simply replace them with '.'.
	 *
	 * Additionally Pandora excludes some characters from the titles in the
	 * xml page.  These characters are ignored.
	 */
	index2 = 0;
	for (index = 0; title[index] != '\0'; index++) {
		if (title[index] == '^' ||
			title[index] == '$' ||
			title[index] == '(' ||
			title[index] == ')' ||
			title[index] == '>' ||
			title[index] == '<' ||
			title[index] == '[' ||
			title[index] == '{' ||
			title[index] == '\\' ||
			title[index] == '|' ||
			title[index] == '.' ||
			title[index] == '*' ||
			title[index] == '+' ||
			title[index] == '&') {
			regex_title[index2] = '.';
			index2++;
		} else if (title[index] == '?' ) {
			/*
			 * Skip these characters.
			 */
		} else {
			regex_title[index2] = title[index];
			index2++;
		}
	}
	regex_title[index2] = '\0';

	status = BarFlyasprintf(&regex_string,
			"songTitle *= *\"%s\"[^>]+"
			"discNum *= *\"([0-9]+)\"[^>]+"
			"trackNum *= *\"([0-9]+)\"", regex_title);
	if (status == -1) {
		BarUiMsg(settings, MSG_ERR, "Failed to create the regex string to get "
				"the track and disc numbers (%d:%s).\n", errno,
				strerror(errno));
		goto error;
	}

	/*
	 * Compile and execute the regular expression to get the track and disc
	 * numbers.
	 */
	status = regcomp(&regex_track, regex_string, REG_EXTENDED);
	if (status != 0) {
		regerror(status, &regex_track, error_msg, ERROR_MSG_SIZE);
		BarUiMsg(settings, MSG_ERR, "Failed to compile the regex to get the "
				"track and disc numbers (%d:%s).\n", status, error_msg);
		goto error;
	}

	memset(match, 0, sizeof(match));
	status = regexec(&regex_track, album_xml, MATCH_COUNT, match, 0);
	if (status != 0) {
		regerror(status, &regex_track, error_msg, ERROR_MSG_SIZE);
		BarUiMsg(settings, MSG_DEBUG, "The track and disc numbers were not "
				"included in the album explorer page (%d:%s).\n", status,
				error_msg);
		goto error;
	}

	/*
//.........这里部分代码省略.........