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https://github.com/sle118/squeezelite-esp32.git
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49 lines
2.1 KiB
C
49 lines
2.1 KiB
C
/*
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* (c) Philippe G. 2019, philippe_44@outlook.com
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#pragma once
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#include "gds.h"
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/*
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The displayer is not thread-safe and the caller must ensure use its own
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mutexes if it wants something better. Especially, text() line() and draw()
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are not protected against each other.
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In text mode (text/line) when using DISPLAY_SUSPEND, the displayer will
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refreshed line 2 one last time before suspending itself. As a result if it
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is in a long sleep (scrolling pause), the refresh will happen after wakeup.
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So it can conflict with other display direct writes that have been made during
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sleep. Note that if DISPLAY_SHUTDOWN has been called meanwhile, it (almost)
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never happens
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The display_bus() shall be subscribed by other displayers so that at least
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when this one (the main) wants to take control over display, it can signal
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that to others
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*/
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extern struct GDS_Device *display;
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enum displayer_cmd_e { DISPLAYER_SHUTDOWN, DISPLAYER_ACTIVATE, DISPLAYER_SUSPEND, DISPLAYER_TIMER_PAUSE, DISPLAYER_TIMER_RUN };
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enum displayer_time_e { DISPLAYER_ELAPSED, DISPLAYER_REMAINING };
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enum display_bus_cmd_e { DISPLAY_BUS_TAKE, DISPLAY_BUS_GIVE };
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bool (*display_bus)(void *from, enum display_bus_cmd_e cmd);
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void displayer_scroll(char *string, int speed, int pause);
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void displayer_control(enum displayer_cmd_e cmd, ...);
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void displayer_metadata(char *artist, char *album, char *title);
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void displayer_timer(enum displayer_time_e mode, int elapsed, int duration);
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