Altivec Patch (Mark III) by (Dieter Shirley <dieters at schemasoft dot com>)

Originally committed as revision 1147 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 77 insertions, 0 deletions

diff --git a/libavcodec/ppc/mpegvideo_ppc.c b/libavcodec/ppc/mpegvideo_ppc.c
new file mode 100644
index 0000000000..1f5e5a4ef1
--- /dev/null
+++ b/libavcodec/ppc/mpegvideo_ppc.c
@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2002 Dieter Shirley
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+ 
+#include <time.h>
+#include "../../config.h"
+#include "../dsputil.h"
+#include "../mpegvideo.h"
+
+#ifdef HAVE_ALTIVEC
+#include "dsputil_altivec.h"
+#endif
+
+extern int dct_quantize_altivec(MpegEncContext *s,  
+        DCTELEM *block, int n,
+        int qscale, int *overflow);
+
+extern void idct_put_altivec(UINT8 *dest, int line_size, INT16 *block);
+extern void idct_add_altivec(UINT8 *dest, int line_size, INT16 *block);
+
+
+void MPV_common_init_ppc(MpegEncContext *s)
+{
+#if HAVE_ALTIVEC
+    if (has_altivec())
+    {
+        if ((s->avctx->idct_algo == FF_IDCT_AUTO) ||
+                (s->avctx->idct_algo == FF_IDCT_ALTIVEC))
+        {
+            s->idct_put = idct_put_altivec;
+            s->idct_add = idct_add_altivec;
+            s->idct_permutation_type = FF_TRANSPOSE_IDCT_PERM;
+        }
+
+        // Test to make sure that the dct required alignments are met.
+        if ((((long)(s->q_intra_matrix) & 0x0f) != 0) ||
+                (((long)(s->q_inter_matrix) & 0x0f) != 0))
+        {
+            fprintf(stderr, "Internal Error: q-matrix blocks must be 16-byte aligned "
+                    "to use Altivec DCT. Reverting to non-altivec version.\n");
+            return;
+        }
+
+        if (((long)(s->intra_scantable.inverse) & 0x0f) != 0)
+        {
+            fprintf(stderr, "Internal Error: scan table blocks must be 16-byte aligned "
+                    "to use Altivec DCT. Reverting to non-altivec version.\n");
+            return;
+        }
+
+
+        if ((s->avctx->dct_algo == FF_DCT_AUTO) ||
+                (s->avctx->dct_algo == FF_DCT_ALTIVEC))
+        {
+            s->dct_quantize = dct_quantize_altivec;
+        }
+    } else
+#endif
+    {
+        /* Non-AltiVec PPC optimisations here */
+    }
+}
+