ffmpeg/libavcodec/ppc/mpegvideo_ppc.c
Michael Niedermayer 05c4072b45 Altivec Patch (Mark III) by (Dieter Shirley <dieters at schemasoft dot com>)
Originally committed as revision 1147 to svn://svn.ffmpeg.org/ffmpeg/trunk
2002-11-02 11:28:08 +00:00

78 lines
2.4 KiB
C

/*
* 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 */
}
}