From http://www.jwz.org/xscreensaver/xscreensaver-5.37.tar.gz

[xscreensaver] / hacks / analogtv.h

diff --git a/hacks/analogtv.h b/hacks/analogtv.h
index e63b28d7a9357286dc4a464e28cc8fd58c725dd7..ed3ce340bb184362b3da02f433fef405daa227f4 100644 (file)
--- a/hacks/analogtv.h
+++ b/hacks/analogtv.h
@@ -1,4 +1,4 @@
-/* analogtv, Copyright (c) 2003, 2004 Trevor Blackwell <tlb@tlb.org>
+/* analogtv, Copyright (c) 2003-2016 Trevor Blackwell <tlb@tlb.org>
  *
  * Permission to use, copy, modify, distribute, and sell this software and its
  * documentation for any purpose is hereby granted without fee, provided that
@@ -12,8 +12,13 @@
 #ifndef _XSCREENSAVER_ANALOGTV_H
 #define _XSCREENSAVER_ANALOGTV_H
 
+#include "thread_util.h"
 #include "xshm.h"
 
+#if defined(USE_IPHONE) || defined(HAVE_ANDROID)
+# define HAVE_MOBILE
+#endif
+
 /*
   You'll need these to generate standard NTSC TV signals
  */
@@ -65,11 +70,16 @@ enum {
   ANALOGTV_SIGNAL_LEN=ANALOGTV_V*ANALOGTV_H,
 
   /* The number of intensity levels we deal with for gamma correction &c */
-  ANALOGTV_CV_MAX=1024
+  ANALOGTV_CV_MAX=1024,
+
+  /* MAX_LINEHEIGHT corresponds to 2400 vertical pixels, beyond which
+     it interpolates extra black lines. */
+  ANALOGTV_MAX_LINEHEIGHT=12
+
 };
 
 typedef struct analogtv_input_s {
-  char signal[ANALOGTV_V+1][ANALOGTV_H];
+  signed char signal[ANALOGTV_V+1][ANALOGTV_H];
 
   int do_teletext;
 
@@ -106,6 +116,10 @@ typedef struct analogtv_reception_s {
   The rest of this should be considered mostly opaque to the analogtv module.
  */
 
+struct analogtv_yiq_s {
+  float y,i,q;
+} /*yiq[ANALOGTV_PIC_LEN+10] */;
+
 typedef struct analogtv_s {
 
   Display *dpy;
@@ -113,6 +127,8 @@ typedef struct analogtv_s {
   Screen *screen;
   XWindowAttributes xgwa;
 
+  struct threadpool threads;
+
 #if 0
   unsigned int onscreen_signature[ANALOGTV_V];
 #endif
@@ -122,14 +138,14 @@ typedef struct analogtv_s {
   int interlace;
   int interlace_counter;
 
-  double agclevel;
+  float agclevel;
 
   /* If you change these, call analogtv_set_demod */
-  double tint_control,color_control,brightness_control,contrast_control;
-  double height_control, width_control, squish_control;
-  double horiz_desync;
-  double squeezebottom;
-  double powerup;
+  float tint_control,color_control,brightness_control,contrast_control;
+  float height_control, width_control, squish_control;
+  float horiz_desync;
+  float squeezebottom;
+  float powerup;
 
   /* internal cache */
   int blur_mult;
@@ -145,16 +161,15 @@ typedef struct analogtv_s {
   int fakeit_scroll;
   int redraw_all;
 
-  int use_shm,use_cmap,use_color;
+  int use_cmap,use_color;
   int bilevel_signal;
 
-#ifdef HAVE_XSHM_EXTENSION
   XShmSegmentInfo shm_info;
-#endif
   int visdepth,visclass,visbits;
-  int red_invprec,red_shift,red_mask;
-  int green_invprec,green_shift,green_mask;
-  int blue_invprec,blue_shift,blue_mask;
+  int red_invprec, red_shift;
+  int green_invprec, green_shift;
+  int blue_invprec, blue_shift;
+  unsigned long red_mask, green_mask, blue_mask;
 
   Colormap colormap;
   int usewidth,useheight,xrepl,subwidth;
@@ -162,10 +177,6 @@ typedef struct analogtv_s {
   GC gc;
   int screen_xo,screen_yo; /* centers image in window */
 
-  void (*event_handler)(Display *dpy, XEvent *event);
-  int (*key_handler)(Display *dpy, XEvent *event,void *key_data);
-  void *key_data;
-
   int flutter_horiz_desync;
   int flutter_tint;
 
@@ -187,21 +198,19 @@ typedef struct analogtv_s {
   int hashnoise_enable;
   int shrinkpulse;
 
-  double crtload[ANALOGTV_V];
+  float crtload[ANALOGTV_V];
 
   unsigned int red_values[ANALOGTV_CV_MAX];
   unsigned int green_values[ANALOGTV_CV_MAX];
   unsigned int blue_values[ANALOGTV_CV_MAX];
 
-  struct analogtv_yiq_s {
-    float y,i,q;
-  } yiq[ANALOGTV_PIC_LEN+10];
-
   unsigned long colors[256];
   int cmap_y_levels;
   int cmap_i_levels;
   int cmap_q_levels;
 
+  float tint_i, tint_q;
+  
   int cur_hsync;
   int line_hsync[ANALOGTV_V];
   int cur_vsync;
@@ -210,8 +219,22 @@ typedef struct analogtv_s {
 
   int channel_change_cycles;
   double rx_signal_level;
-  double rx_signal[ANALOGTV_SIGNAL_LEN + 2*ANALOGTV_H];
+  float *rx_signal;
+
+  struct {
+    int index;
+    double value;
+  } leveltable[ANALOGTV_MAX_LINEHEIGHT+1][ANALOGTV_MAX_LINEHEIGHT+1];
+
+  /* Only valid during draw. */
+  unsigned random0, random1;
+  double noiselevel;
+  const analogtv_reception *const *recs;
+  unsigned rec_count;
 
+  float *signal_subtotals;
+
+  float puheight;
 } analogtv;
 
 
@@ -226,15 +249,13 @@ void analogtv_release(analogtv *it);
 int analogtv_set_demod(analogtv *it);
 void analogtv_setup_frame(analogtv *it);
 void analogtv_setup_sync(analogtv_input *input, int do_cb, int do_ssavi);
-void analogtv_draw(analogtv *it);
+void analogtv_draw(analogtv *it, double noiselevel,
+                   const analogtv_reception *const *recs, unsigned rec_count);
 
 int analogtv_load_ximage(analogtv *it, analogtv_input *input, XImage *pic_im);
 
 void analogtv_reception_update(analogtv_reception *inp);
 
-void analogtv_init_signal(analogtv *it, double noiselevel);
-void analogtv_add_signal(analogtv *it, analogtv_reception *rec);
-
 void analogtv_setup_teletext(analogtv_input *input);
 
 
@@ -275,18 +296,33 @@ int analogtv_handle_events (analogtv *it);
 #define ANALOGTV_DEFAULTS_SHM
 #endif
 
+#ifndef HAVE_MOBILE
+# define ANALOGTV_DEF_BRIGHTNESS "2"
+# define ANALOGTV_DEF_CONTRAST "150"
+#else
+  /* Need to really crank this up for it to look good on the iPhone screen. */
+# define ANALOGTV_DEF_BRIGHTNESS "3"
+# define ANALOGTV_DEF_CONTRAST "400"
+#endif
+
 #define ANALOGTV_DEFAULTS \
   "*TVColor:         70", \
   "*TVTint:          5",  \
-  "*TVBrightness:    2",  \
-  "*TVContrast:      150",\
+  "*TVBrightness:  " ANALOGTV_DEF_BRIGHTNESS,  \
+  "*TVContrast:    " ANALOGTV_DEF_CONTRAST, \
   "*Background:      Black", \
   "*use_cmap:        0",  \
   "*geometry:       800x600", \
+  "*fpsSolid:       True", \
+  THREAD_DEFAULTS \
   ANALOGTV_DEFAULTS_SHM
 
 #define ANALOGTV_OPTIONS \
-  { "-use-cmap",        ".use_cmap",  XrmoptionSepArg, 0 },
-
+  THREAD_OPTIONS \
+  { "-use-cmap",        ".use_cmap",     XrmoptionSepArg, 0 }, \
+  { "-tv-color",        ".TVColor",      XrmoptionSepArg, 0 }, \
+  { "-tv-tint",         ".TVTint",       XrmoptionSepArg, 0 }, \
+  { "-tv-brightness",   ".TVBrightness", XrmoptionSepArg, 0 }, \
+  { "-tv-contrast",     ".TVContrast",   XrmoptionSepArg, 0 },
 
 #endif /* _XSCREENSAVER_ANALOGTV_H */