Backported S-DD1 emulation.

1 files changed, 0 insertions, 112 deletions

diff --git a/source/sdd1emu.c b/source/sdd1emu.c
index cccbf27..4fbfac5 100644
--- a/source/sdd1emu.c
+++ b/source/sdd1emu.c
@@ -343,115 +343,3 @@ void SDD1_decompress(uint8_t* out, uint8_t* in, int len)
       break;
    }
 }
-
-static uint8_t cur_plane;
-static uint8_t num_bits;
-static uint8_t next_byte;
-
-void SDD1_init(uint8_t* in)
-{
-   bitplane_type = in[0] >> 6;
-
-   switch (in[0] & 0x30)
-   {
-   case 0x00:
-      high_context_bits = 0x01c0;
-      low_context_bits = 0x0001;
-      break;
-   case 0x10:
-      high_context_bits = 0x0180;
-      low_context_bits = 0x0001;
-      break;
-   case 0x20:
-      high_context_bits = 0x00c0;
-      low_context_bits = 0x0001;
-      break;
-   case 0x30:
-      high_context_bits = 0x0180;
-      low_context_bits = 0x0003;
-      break;
-   }
-
-   in_stream = (in[0] << 11) | (in[1] << 3);
-   valid_bits = 5;
-   in_buf = in + 2;
-   memset(bit_ctr, 0, sizeof(bit_ctr));
-   memset(context_states, 0, sizeof(context_states));
-   memset(context_MPS, 0, sizeof(context_MPS));
-   memset(prev_bits, 0, sizeof(prev_bits));
-
-   cur_plane = 0;
-   num_bits = 0;
-}
-
-uint8_t SDD1_get_byte(void)
-{
-   uint8_t bit;
-   uint8_t byte = 0;
-
-   switch (bitplane_type)
-   {
-   case 0:
-      num_bits += 16;
-      if (num_bits & 16)
-      {
-         next_byte = 0;
-         for (bit = 0x80; bit; bit >>= 1)
-         {
-            if (GetBit(0)) byte |= bit;
-            if (GetBit(1)) next_byte |= bit;
-         }
-         return byte;
-      }
-      else
-         return next_byte;
-
-   case 1:
-      num_bits += 16;
-      if (num_bits & 16)
-      {
-         next_byte = 0;
-         for (bit = 0x80; bit; bit >>= 1)
-         {
-            if (GetBit(cur_plane)) byte |= bit;
-            if (GetBit(cur_plane + 1)) next_byte |= bit;
-         }
-         return byte;
-      }
-      else
-      {
-         if (!num_bits) cur_plane = (cur_plane + 2) & 7;
-         return next_byte;
-      }
-
-   case 2:
-      num_bits += 16;
-      if (num_bits & 16)
-      {
-         next_byte = 0;
-         for (bit = 0x80; bit; bit >>= 1)
-         {
-            if (GetBit(cur_plane)) byte |= bit;
-            if (GetBit(cur_plane + 1)) next_byte |= bit;
-         }
-         return byte;
-      }
-      else
-      {
-         if (!num_bits) cur_plane ^= 2;
-         return next_byte;
-      }
-
-   case 3:
-      for (cur_plane = 0, bit = 1; bit; bit <<= 1, cur_plane++)
-      {
-         if (GetBit(cur_plane)) byte |= bit;
-      }
-      return byte;
-
-   default:
-      /* should never happen */
-      return 0;
-   }
-}
-