From 470457e22a1b5537013603d5e367c51e47bb61bf Mon Sep 17 00:00:00 2001
From: James <git@panaceas.org>
Date: Mon, 5 May 2014 17:50:20 +0100
Subject: fish

---
 video_switch.c | 365 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 365 insertions(+)
 create mode 100644 video_switch.c

(limited to 'video_switch.c')

diff --git a/video_switch.c b/video_switch.c
new file mode 100644
index 0000000..74d70b5
--- /dev/null
+++ b/video_switch.c
@@ -0,0 +1,365 @@
+#include "project.h"
+#include "lirc.h"
+
+#define NOTPULSE  0
+#define PULSE  	  0
+
+
+#define ONE(a)  ((a) | PULSE)
+#define ZERO(a) ((a) | NOTPULSE)
+
+
+typedef struct
+{
+  int fd;
+  int a;
+  int b;
+  unsigned mask;
+} MS;
+
+struct MM_struct
+{
+  MS *left, *right, *top;
+};
+
+
+static uint8_t
+read_byte (int **bits, int *n)
+{
+  uint8_t c = 0;
+  int i = 8;
+
+  while (i-- && (*n)--)
+    {
+      c <<= 1;
+      c |= ! !(*((*bits)++));
+    }
+
+  return c;
+}
+
+static void
+dump_bits (int *bits, int n)
+{
+  uint8_t b;
+  int i;
+
+  for (i = 0; i < n; ++i)
+    {
+      printf ("%d", bits[i]);
+      if ((i % 8) == 7)
+        printf (" ");
+    }
+  printf ("\n");
+
+  while (n > 0)
+    {
+      b = read_byte (&bits, &n);
+      printf ("%02x ", b);
+    }
+  printf ("\n");
+
+
+}
+
+
+
+
+
+static void
+bit (int b)
+{
+  static int bits[1024];
+  static int bc;
+
+
+  if (b == 2)
+    {
+      bc = 0;
+      return;
+    }
+
+
+
+  if (b == 3)
+    {
+      if (bc)
+        dump_bits (bits, bc);
+      bc = 0;
+      return;
+    }
+
+//  printf("     > bit[%3d]=%d\n",bc,b);
+
+  bits[bc++] = b;
+}
+
+
+static void
+ana (lirc_t * buf, int n, int mode)
+{
+  int s = 0;
+
+  while (n--)
+    {
+      lirc_t v = *(buf++);
+
+      if (mode == 2)
+        s = (v & 0xff000000U) ? 1 : 0;
+      else
+        s = !s;
+
+      v &= 0xffffff;
+
+//      printf ("%5d %d\n", v, s);
+
+      if (s)
+        continue;
+
+      if ((v < 5000) && (v > 4000))
+        {
+          bit (2);
+        }
+      else if ((v < 750) && (v > 450))
+        {
+          bit (0);
+        }
+      else if ((v < 1850) && (v > 1500))
+        {
+          bit (1);
+        }
+      else
+        {
+          bit (3);
+        }
+    }
+
+
+
+}
+
+static void
+listen (int fd)
+{
+
+  for (;;)
+    {
+      lirc_t v;
+
+      read (fd, &v, sizeof (v));
+      ana (&v, 1, 2);
+
+
+
+    }
+}
+
+static int
+send_command (int fd, unsigned mask, uint8_t * buf, int n)
+{
+  lirc_t cbuf[128], *ptr = cbuf;
+  uint8_t c;
+  int b = 0;
+
+  printf ("Sending %x %x %x %x to fd %d mask %x\n",
+          buf[0], buf[1], buf[2], buf[3], fd, mask);
+
+  *(ptr++) = ONE (9300);
+  *(ptr++) = ZERO (4500);
+  b += 2;
+
+  while (n--)
+    {
+      for (c = 128; c; c >>= 1)
+        {
+          if ((*buf) & c)
+            {
+              *(ptr++) = ONE (550);
+              *(ptr++) = ZERO (1650);
+            }
+          else
+            {
+              *(ptr++) = ONE (550);
+              *(ptr++) = ZERO (600);
+            }
+          b += 2;
+
+
+        }
+      buf++;
+    }
+  *(ptr++) = ONE (550);
+  b++;
+
+
+
+
+#if 0
+  ana (cbuf, b, 0);
+  bit (3);
+#endif
+
+
+  ioctl (fd, LIRC_SET_TRANSMITTER_MASK, &mask);
+
+#if 0
+  if (write (fd, cbuf, sizeof (lirc_t) * b) != (b * sizeof (lirc_t)))
+    return -1;
+  usleep (20000);
+#endif
+  if (write (fd, cbuf, sizeof (lirc_t) * b) != (b * sizeof (lirc_t)))
+    return -1;
+  usleep (100000);
+  return 0;
+}
+
+
+static int
+send_command4 (int fd, unsigned m, uint8_t c1, uint8_t c2, uint8_t c3,
+               uint8_t c4)
+{
+  uint8_t c[] = { c1, c2, c3, c4 };
+  return send_command (fd, m, c, sizeof (c));
+}
+
+static int
+s42 (int fd, int ab, unsigned mask, int d)
+{
+  uint8_t c3[2][5] =
+    { {0xb0, 0x98, 0xa8, 0x0a, 0x52}, {0x40, 0x18, 0x8a, 0xca, 0xa2} };
+  uint8_t c4[2][5] =
+    { {0x4f, 0x67, 0x57, 0xf5, 0xad}, {0xbf, 0xe7, 0x75, 0x35, 0x5d} };
+
+  if (ab < 0)
+    return -1;
+  if (ab > 1)
+    return -1;
+  if (d < 0)
+    return -1;
+  if (d > 4)
+    return -1;
+
+
+  return send_command4 (fd, mask, 0x00, 0xff, c3[ab][d], c4[ab][d]);
+
+}
+
+static int
+s51 (int fd, unsigned mask, int d)
+{
+  uint8_t c3[6] = { 0x00, 0xa0, 0x10, 0x90, 0x50, 0xb0 };
+  uint8_t c4[6] = { 0x00, 0x5f, 0xef, 0x6f, 0xaf, 0x4f };
+
+  if (d < 1)
+    return -1;
+  if (d > 5)
+    return -1;
+
+
+  return send_command4 (fd, mask, 0x00, 0xfd, c3[d], c4[d]);
+}
+
+
+static int
+MS_set (MS * m, int a, int b)
+{
+  if (!m)
+    return -1;
+
+
+
+  if ((a != -1) && (m->a != a))
+    {
+
+      if (s42 (m->fd, 0, m->mask, a))
+        return -1;
+      m->a = a;
+    }
+
+
+  if ((b != -1) && (m->b != b))
+    {
+      if (s42 (m->fd, 1, m->mask, b))
+        return -1;
+      m->b = b;
+    }
+
+
+  return 0;
+}
+
+
+static MS *
+MS_open (int fd, unsigned mask)
+{
+  MS *ret = malloc (sizeof (MS));
+
+  ret->fd = fd;
+  ret->a = -1;
+  ret->b = -1;
+  ret->mask = mask;
+
+  return ret;
+}
+
+MM *
+MM_open (void)
+{
+  int fd;
+  MM *ret = malloc (sizeof (MM));
+  unsigned u;
+
+  fd = open ("/dev/lirc0", O_RDWR);
+  u = 40000;
+  ioctl (fd, LIRC_SET_SEND_CARRIER, &u);
+
+  //s51(fd,1,2);
+
+  //listen(fd);
+
+  ret->left = MS_open (fd, 1);
+  ret->right = NULL;            //MS_open (fd, 2);
+
+  fd = open ("/dev/lirc1", O_RDWR);
+  u = 40000;
+  ioctl (fd, LIRC_SET_SEND_CARRIER, &u);
+  ret->top = NULL;              // MS_open (fd, 1);
+
+
+
+  return ret;
+}
+
+
+int
+MM_set (MM * m, int a, int b)
+{
+
+  return MS_set (m->left, a, b);
+
+
+}
+
+int
+VS_set (MM * m, int v)
+{
+  return s51 (m->left->fd, 2, v);
+}
+
+
+
+
+#if 0
+main (int argc, char *argv[])
+{
+
+  MM *mm;
+
+  mm = MM_open ();
+
+//  MM_set (mm,1, 2);
+  //MM_set (mm,-1, 1);
+//  MM_set (mm,1, -1);
+
+}
+#endif
-- 
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