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terminal: process input when foregrounded

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When mpv is in the background because it was started with
`mpv foo.mp3 &`, or the user did ctrl+z bg, and is then brought to the
foreground with fg, it buffers input until you press enter. This makes
it accept input almost immediately. Having a short interval isn't
important, since input is buffered until the next loop iteration.

Closes #8120.
This commit is contained in:
Guido Cella 2020-11-26 11:54:43 +01:00 committed by avih
parent fa7afc3e19
commit 9867f21830
1 changed files with 9 additions and 1 deletions
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10
osdep/terminal-unix.c
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@ -45,6 +45,14 @@
// Timeout in ms after which the (normally ambiguous) ESC key is detected.
#define ESC_TIMEOUT 100
// Timeout in ms after which the poll for input is aborted. The FG/BG state is
// tested before every wait, and a positive value allows reactivating input
// processing when mpv is brought to the foreground while it was running in the
// background. In such a situation, an infinite timeout (-1) will keep mpv
// waiting for input without realizing the terminal state changed - and thus
// buffer all keypresses until ENTER is pressed.
#define INPUT_TIMEOUT 1000
static volatile struct termios tio_orig;
static volatile int tio_orig_set;
@ -397,7 +405,7 @@ static void *terminal_thread(void *ptr)
{ .events = POLLIN, .fd = death_pipe[0] },
{ .events = POLLIN, .fd = tty_in }
};
int r = polldev(fds, stdin_ok ? 2 : 1, buf.len ? ESC_TIMEOUT : -1);
int r = polldev(fds, stdin_ok ? 2 : 1, buf.len ? ESC_TIMEOUT : INPUT_TIMEOUT);
if (fds[0].revents)
break;
if (fds[1].revents) {