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input: simplify by not tracking key up/down states 

We only need to track key up/down for a single key. There may be some
minor loss of robustness, but this can (probably) happen only if a VO or
user sends strange or complicated sequences of events. In the normal
case, what we do is more than enough. Most simplification comes from the
fact that mpv is not a game console, and users normally execute only one
action at once.
This commit is contained in:
wm4 2014-04-18 17:45:41 +02:00
parent 46e0ede228
commit 6b9ec41a43
1 changed files with 32 additions and 55 deletions
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87
input/input.c
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@ -139,9 +139,8 @@ struct input_ctx {
// history of key downs - the newest is in position 0
int key_history[MP_MAX_KEY_DOWN];
// these are the keys currently down
int key_down[MP_MAX_KEY_DOWN];
unsigned int num_key_down;
// key code of the last key that triggered MP_KEY_STATE_DOWN
int last_key_down;
int64_t last_key_down_time;
bool current_down_cmd_need_release;
struct mp_cmd *current_down_cmd;
@ -529,28 +528,17 @@ static void release_down_cmd(struct input_ctx *ictx, bool drop_current)
}
ictx->current_down_cmd = NULL;
ictx->current_down_cmd_need_release = false;
ictx->last_key_down = 0;
ictx->last_key_down_time = 0;
ictx->ar_state = -1;
}
static int find_key_down(struct input_ctx *ictx, int code)
static void release_all(struct input_ctx *ictx)
{
code &= ~(MP_KEY_STATE_UP | MP_KEY_STATE_DOWN | MP_KEY_MODIFIER_MASK);
for (int j = 0; j < ictx->num_key_down; j++) {
if ((ictx->key_down[j] & ~MP_KEY_MODIFIER_MASK) == code)
return j;
}
return -1;
}
static void remove_key_down(struct input_ctx *ictx, int code)
{
int index = find_key_down(ictx, code);
if (index >= 0) {
memmove(&ictx->key_down[index], &ictx->key_down[index + 1],
(ictx->num_key_down - (index + 1)) * sizeof(int));
ictx->num_key_down -= 1;
}
ictx->last_key_down = 0;
ictx->last_key_down_time = 0;
release_down_cmd(ictx, false);
update_mouse_section(ictx);
}
// Whether a command shall be sent on both key down and key up events.
@ -585,58 +573,49 @@ static void interpret_key(struct input_ctx *ictx, int code, double scale)
if (unmod >= 32 && unmod < MP_KEY_BASE)
code &= ~MP_KEY_MODIFIER_SHIFT;
if (mp_msg_test(ictx->log, MSGL_DEBUG)) {
int noflags = code & ~(MP_KEY_STATE_DOWN | MP_KEY_STATE_UP);
char *key = mp_input_get_key_name(noflags);
MP_DBG(ictx, "key code=%#x '%s'%s%s\n",
code, key, (code & MP_KEY_STATE_DOWN) ? " down" : "",
(code & MP_KEY_STATE_UP) ? " up" : "");
talloc_free(key);
}
int state = code & (MP_KEY_STATE_DOWN | MP_KEY_STATE_UP);
code = code & ~(unsigned)state;
if (!(code & MP_KEY_STATE_UP) && ictx->num_key_down >= MP_MAX_KEY_DOWN) {
MP_ERR(ictx, "Too many key down events at the same time\n");
return;
if (mp_msg_test(ictx->log, MSGL_DEBUG)) {
char *key = mp_input_get_key_name(code);
MP_DBG(ictx, "key code=%#x '%s'%s%s\n",
code, key, (state & MP_KEY_STATE_DOWN) ? " down" : "",
(state & MP_KEY_STATE_UP) ? " up" : "");
talloc_free(key);
}
if (MP_KEY_DEPENDS_ON_MOUSE_POS(unmod))
ictx->mouse_event_counter++;
ictx->got_new_events = true;
bool key_was_down = find_key_down(ictx, code) >= 0;
struct mp_cmd *cmd = NULL;
if (code & MP_KEY_STATE_DOWN) {
// Check if we don't already have this key as pushed
if (key_was_down)
if (state == MP_KEY_STATE_DOWN) {
// Protect against VOs which send STATE_DOWN with autorepeat
if (ictx->last_key_down == code)
return;
// Cancel current down-event (there can be only one)
release_down_cmd(ictx, true);
ictx->key_down[ictx->num_key_down] = code & ~MP_KEY_STATE_DOWN;
ictx->num_key_down++;
update_mouse_section(ictx);
ictx->last_key_down_time = mp_time_us();
ictx->ar_state = 0;
cmd = get_cmd_from_keys(ictx, NULL, code & ~MP_KEY_STATE_DOWN);
key_buf_add(ictx->key_history, code & ~MP_KEY_STATE_DOWN);
cmd = get_cmd_from_keys(ictx, NULL, code);
key_buf_add(ictx->key_history, code);
if (cmd && should_drop_cmd(ictx, cmd)) {
ictx->num_key_down--;
talloc_free(cmd);
return;
}
ictx->last_key_down = code;
ictx->last_key_down_time = mp_time_us();
ictx->ar_state = 0;
if (cmd && (code & MP_KEY_EMIT_ON_UP))
cmd->key_up_follows = true;
ictx->current_down_cmd = mp_cmd_clone(cmd);
ictx->current_down_cmd_need_release = false;
} else if (code & MP_KEY_STATE_UP) {
if (key_was_down) {
remove_key_down(ictx, code & ~MP_KEY_STATE_DOWN);
release_down_cmd(ictx, false);
}
update_mouse_section(ictx);
} else if (state == MP_KEY_STATE_UP) {
// Most VOs send RELEASE_ALL anyway
release_all(ictx);
} else {
// Press of key with no separate down/up events
if (key_was_down) {
if (ictx->last_key_down == code) {
// Mixing press events and up/down with the same key is not allowed
MP_WARN(ictx, "Mixing key presses and up/down.\n");
}
@ -671,9 +650,7 @@ static void mp_input_feed_key(struct input_ctx *ictx, int code, double scale)
{
if (code == MP_INPUT_RELEASE_ALL) {
MP_DBG(ictx, "release all\n");
ictx->num_key_down = 0;
release_down_cmd(ictx, false);
update_mouse_section(ictx);
release_all(ictx);
return;
}
if (code == MP_KEY_MOUSE_LEAVE) {
@ -1043,7 +1020,7 @@ static void input_wait_read(struct input_ctx *ictx, int time)
*/
static void read_events(struct input_ctx *ictx, int time)
{
if (ictx->num_key_down && ictx->ar_rate > 0) {
if (ictx->last_key_down && ictx->ar_rate > 0) {
time = FFMIN(time, 1000 / ictx->ar_rate);
time = FFMIN(time, ictx->ar_delay);
}
@ -1088,8 +1065,8 @@ int mp_input_queue_cmd(struct input_ctx *ictx, mp_cmd_t *cmd)
static mp_cmd_t *check_autorepeat(struct input_ctx *ictx)
{
// No input : autorepeat ?
if (ictx->ar_rate > 0 && ictx->ar_state >= 0 && ictx->num_key_down > 0
&& !(ictx->key_down[ictx->num_key_down - 1] & MP_NO_REPEAT_KEY)) {
if (ictx->ar_rate > 0 && ictx->ar_state >= 0 && ictx->last_key_down
&& !(ictx->last_key_down & MP_NO_REPEAT_KEY)) {
int64_t t = mp_time_us();
if (ictx->last_ar + 2000000 < t)
ictx->last_ar = t;