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virtualize the interface for video grabbers, which should

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make it easier to add support for more grabbers (V4L2,
firewire, and so on).



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@95288 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Luigi Rizzo
2007-12-29 01:10:14 +00:00
parent a799456578
commit f2702ec721
2 changed files with 240 additions and 147 deletions
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24
channels/console_gui.c
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@@ -503,17 +503,6 @@ static void handle_keyboard_input(struct video_desc *env, SDLKey key)
return;
}
/*
* Check if the grab point is inside the X screen.
*
* x represent the new grab value
* limit represent the upper value to use
*/
static int boundary_checks(int x, int limit)
{
return (x <= 0) ? 0 : (x > limit ? limit : x);
}
/* implement superlinear acceleration on the movement */
static int move_accel(int delta)
{
@@ -521,6 +510,7 @@ static int move_accel(int delta)
return (delta > 0) ? delta + d1 : delta - d1;
}
static void grabber_move(struct video_out_desc *, int dx, int dy);
/*
* Move the source of the captured video.
*
@@ -529,21 +519,17 @@ static int move_accel(int delta)
*/
static void move_capture_source(struct video_desc *env, int x_final_drag, int y_final_drag)
{
int new_x, new_y; /* new coordinates for grabbing local video */
int x = env->out.loc_src.x; /* old value */
int y = env->out.loc_src.y; /* old value */
int dx, dy;
/* move the origin */
#define POLARITY -1 /* +1 or -1 depending on the desired direction */
new_x = x + POLARITY*move_accel(x_final_drag - env->gui->x_drag) * 3;
new_y = y + POLARITY*move_accel(y_final_drag - env->gui->y_drag) * 3;
dx = POLARITY*move_accel(x_final_drag - env->gui->x_drag) * 3;
dy = POLARITY*move_accel(y_final_drag - env->gui->y_drag) * 3;
#undef POLARITY
env->gui->x_drag = x_final_drag; /* update origin */
env->gui->y_drag = y_final_drag;
/* check boundary and let the source to grab from the new points */
env->out.loc_src.x = boundary_checks(new_x, env->out.screen_width - env->out.loc_src.w);
env->out.loc_src.y = boundary_checks(new_y, env->out.screen_height - env->out.loc_src.h);
grabber_move(&env->out, dx, dy);
return;
}