1 files changed, 87 insertions, 0 deletions
diff --git a/contrib/ffmpeg/libavcodec/ppc/mpegvideo_ppc.c b/contrib/ffmpeg/libavcodec/ppc/mpegvideo_ppc.c
new file mode 100644
index 000000000..c5e822f77
--- /dev/null
+++ b/contrib/ffmpeg/libavcodec/ppc/mpegvideo_ppc.c
@@ -0,0 +1,87 @@
+/*
+ * Copyright (c) 2002 Dieter Shirley
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "../dsputil.h"
+#include "../mpegvideo.h"
+#include <time.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 dct_unquantize_h263_altivec(MpegEncContext *s,
+                                        DCTELEM *block, int n, int qscale);
+
+extern void idct_put_altivec(uint8_t *dest, int line_size, int16_t *block);
+extern void idct_add_altivec(uint8_t *dest, int line_size, int16_t *block);
+
+
+void MPV_common_init_ppc(MpegEncContext *s)
+{
+#ifdef HAVE_ALTIVEC
+    if (has_altivec())
+    {
+      if (s->avctx->lowres==0)
+      {
+        if ((s->avctx->idct_algo == FF_IDCT_AUTO) ||
+                (s->avctx->idct_algo == FF_IDCT_ALTIVEC))
+        {
+            s->dsp.idct_put = idct_put_altivec;
+            s->dsp.idct_add = idct_add_altivec;
+            s->dsp.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))
+        {
+            av_log(s->avctx, AV_LOG_INFO, "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)
+        {
+            av_log(s->avctx, AV_LOG_INFO, "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))
+        {
+#if 0 /* seems to cause trouble under some circumstances */
+            s->dct_quantize = dct_quantize_altivec;
+#endif
+            s->dct_unquantize_h263_intra = dct_unquantize_h263_altivec;
+            s->dct_unquantize_h263_inter = dct_unquantize_h263_altivec;
+        }
+    } else
+#endif
+    {
+        /* Non-AltiVec PPC optimisations here */
+    }
+}
+