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Re: [Qemu-devel] [PATCH 2/2] Enhance sendkey with key hold time
From: |
andrzej zaborowski |
Subject: |
Re: [Qemu-devel] [PATCH 2/2] Enhance sendkey with key hold time |
Date: |
Wed, 4 Jun 2008 12:16:48 +0200 |
On 22/05/2008, Jan Kiszka <address@hidden> wrote:
> Current key injection via the monitor basically generates no key hold
> time. This is fine for keyboard emulations that have their own queues,
> but it causes troubles for those how don't (like the MusicPal - it
> simply does not work with injected keys). Moreover, I would like to use
> this mechanism to simulate pressed buttons during power-up.
>
> Therefore, this patch enhances the key injection with a configurable
> release delay (by default 100 virtual milliseconds).
>
> This feature allows to get rid of the initial sleep() in musicpal_init
> because one can now simply start qemu with -S and issue "sendkey m 1000"
> and "continue" in the monitor to achieve the desired effect of a pressed
> menu button during power-up. So there is no need for a per-musicpal or
> even qemu-wide "-hold-button" switch.
>
> Signed-off-by: Jan Kiszka <address@hidden>
> ---
> hw/musicpal.c | 6 ------
> monitor.c | 57
> ++++++++++++++++++++++++++++++++++++++-------------------
> 2 files changed, 38 insertions(+), 25 deletions(-)
>
> Index: b/hw/musicpal.c
> ===================================================================
> --- a/hw/musicpal.c
> +++ b/hw/musicpal.c
> @@ -1504,12 +1504,6 @@ static void musicpal_init(ram_addr_t ram
>
> qemu_add_kbd_event_handler(musicpal_key_event, pic[MP_GPIO_IRQ]);
>
> - /*
> - * Wait a bit to catch menu button during U-Boot start-up
> - * (to trigger emergency update).
> - */
> - sleep(1);
> -
> mv88w8618_eth_init(&nd_table[0], MP_ETH_BASE, pic[MP_ETH_IRQ]);
>
> mixer_i2c = musicpal_audio_init(MP_AUDIO_BASE, pic[MP_AUDIO_IRQ]);
> Index: b/monitor.c
> ===================================================================
> --- a/monitor.c
> +++ b/monitor.c
> @@ -35,10 +35,7 @@
> #include "audio/audio.h"
> #include "disas.h"
> #include <dirent.h>
> -
> -#ifdef CONFIG_PROFILER
> -#include "qemu-timer.h" /* for ticks_per_sec */
> -#endif
> +#include "qemu-timer.h"
>
> //#define DEBUG
> //#define DEBUG_COMPLETION
> @@ -925,14 +922,37 @@ static int get_keycode(const char *key)
> return -1;
> }
>
> -static void do_sendkey(const char *string)
> +#define MAX_KEYCODES 16
> +static uint8_t keycodes[MAX_KEYCODES];
> +static int nb_pending_keycodes;
> +static QEMUTimer *key_timer;
> +
> +static void release_keys(void *opaque)
> +{
> + int keycode;
> +
> + while (nb_pending_keycodes > 0) {
> + keycode = keycodes[nb_pending_keycodes-1];
> + if (keycode & 0x80)
> + kbd_put_keycode(0xe0);
> + kbd_put_keycode(keycode | 0x80);
> + nb_pending_keycodes--;
> + }
> +}
> +
> +static void do_sendkey(const char *string, int has_hold_time, int hold_time)
> {
> - uint8_t keycodes[16];
> - int nb_keycodes = 0;
> char keyname_buf[16];
> char *separator;
> int keyname_len, keycode, i;
>
> + if (nb_pending_keycodes > 0) {
> + qemu_del_timer(key_timer);
> + release_keys(NULL);
> + }
> + if (!has_hold_time)
> + hold_time = 100;
> + i = 0;
> while (1) {
> separator = strchr(string, '-');
> keyname_len = separator ? separator-string : strlen(string);
> @@ -943,7 +963,7 @@ static void do_sendkey(const char *strin
> term_printf("invalid key: '%s...'\n", keyname_buf);
> return;
> }
> - if (nb_keycodes == sizeof(keycodes)) {
> + if (i == MAX_KEYCODES) {
> term_printf("too many keys\n");
> return;
> }
> @@ -953,26 +973,22 @@ static void do_sendkey(const char *strin
> term_printf("unknown key: '%s'\n", keyname_buf);
> return;
> }
> - keycodes[nb_keycodes++] = keycode;
> + keycodes[i++] = keycode;
> }
> if (!separator)
> break;
> string = separator + 1;
> }
> + nb_pending_keycodes = i;
> /* key down events */
> - for(i = 0; i < nb_keycodes; i++) {
> + for (i = 0; i < nb_pending_keycodes; i++) {
> keycode = keycodes[i];
> if (keycode & 0x80)
> kbd_put_keycode(0xe0);
> kbd_put_keycode(keycode & 0x7f);
> }
> - /* key up events */
> - for(i = nb_keycodes - 1; i >= 0; i--) {
> - keycode = keycodes[i];
> - if (keycode & 0x80)
> - kbd_put_keycode(0xe0);
> - kbd_put_keycode(keycode | 0x80);
> - }
> + /* delayed key up events */
> + qemu_mod_timer(key_timer, qemu_get_clock(vm_clock) +
> 1000000LL*hold_time);
This should use ticks_per_sec.
Also, 100ms seems high for the default value, I think you rarely press
keys for that long.
Cheers
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- Re: [Qemu-devel] [PATCH 2/2] Enhance sendkey with key hold time,
andrzej zaborowski <=