[g3dvl] Implement MPEG2 VLD

Based uppon xine's slice_xvmc.c.
This gets VDPAU up and running.

1 files changed, 138 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/vl/vl_vlc.h b/src/gallium/auxiliary/vl/vl_vlc.h
new file mode 100644
index 00000000000..8c5b3aca47d
--- /dev/null
+++ b/src/gallium/auxiliary/vl/vl_vlc.h
@@ -0,0 +1,138 @@
+/**************************************************************************
+ *
+ * Copyright 2011 Christian König.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+/**
+ * This file is based uppon slice_xvmc.c and vlc.h from the xine project,
+ * which in turn is based on mpeg2dec. The following is the original copyright:
+ *
+ * Copyright (C) 2000-2002 Michel Lespinasse <[email protected]>
+ * Copyright (C) 1999-2000 Aaron Holtzman <[email protected]>
+ *
+ * This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
+ * See http://libmpeg2.sourceforge.net/ for updates.
+ *
+ * mpeg2dec is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * mpeg2dec is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef vl_vlc_h
+#define vl_vlc_h
+
+struct vl_vlc
+{
+   uint32_t buf; /* current 32 bit working set of buffer */
+   int bits;     /* used bits in working set */
+   const uint8_t *ptr; /* buffer with stream data */
+   const uint8_t *max; /* ptr+len of buffer */
+};
+
+static inline void
+vl_vlc_restart(struct vl_vlc *vlc)
+{
+   vlc->buf = (vlc->ptr[0] << 24) | (vlc->ptr[1] << 16) | (vlc->ptr[2] << 8) | vlc->ptr[3];
+   vlc->bits = -16;
+   vlc->ptr += 4;
+}
+
+static inline void
+vl_vlc_init(struct vl_vlc *vlc, const uint8_t *data, unsigned len)
+{
+   vlc->ptr = data;
+   vlc->max = data + len;
+   vl_vlc_restart(vlc);
+}
+
+static inline bool
+vl_vlc_getbyte(struct vl_vlc *vlc)
+{
+   vlc->buf <<= 8;
+   vlc->buf |= vlc->ptr[0];
+   vlc->ptr++;
+   return vlc->ptr < vlc->max;
+}
+
+#define vl_vlc_getword(vlc, shift)                                      \
+do {                                                                    \
+   (vlc)->buf |= (((vlc)->ptr[0] << 8) | (vlc)->ptr[1]) << (shift);     \
+   (vlc)->ptr += 2;                                                     \
+} while (0)
+
+/* make sure that there are at least 16 valid bits in bit_buf */
+#define vl_vlc_needbits(vlc)                    \
+do {                                            \
+    if ((vlc)->bits >= 0) {                      \
+	vl_vlc_getword(vlc, (vlc)->bits);       \
+	(vlc)->bits -= 16;                      \
+    }                                           \
+} while (0)
+
+/* make sure that the full 32 bit of the buffer are valid */
+static inline void
+vl_vlc_need32bits(struct vl_vlc *vlc)
+{
+   vl_vlc_needbits(vlc);
+   if (vlc->bits > -8) {
+      unsigned n = -vlc->bits;
+      vlc->buf <<= n;
+      vlc->buf |= *vlc->ptr << 8;
+      vlc->bits = -8;
+      vlc->ptr++;
+   }
+   if (vlc->bits > -16) {
+      unsigned n = -vlc->bits - 8;
+      vlc->buf <<= n;
+      vlc->buf |= *vlc->ptr;
+      vlc->bits = -16;
+      vlc->ptr++;
+   }
+}
+
+/* remove num valid bits from bit_buf */
+#define vl_vlc_dumpbits(vlc, num)       \
+do {					\
+    (vlc)->buf <<= (num);		\
+    (vlc)->bits += (num);		\
+} while (0)
+
+/* take num bits from the high part of bit_buf and zero extend them */
+#define vl_vlc_ubits(vlc, num) (((uint32_t)((vlc)->buf)) >> (32 - (num)))
+
+/* take num bits from the high part of bit_buf and sign extend them */
+#define vl_vlc_sbits(vlc, num) (((int32_t)((vlc)->buf)) >> (32 - (num)))
+
+#endif /* vl_vlc_h */