2
* Copyright (c) 2002 Dieter Shirley
4
* This library is free software; you can redistribute it and/or
5
* modify it under the terms of the GNU Lesser General Public
6
* License as published by the Free Software Foundation; either
7
* version 2 of the License, or (at your option) any later version.
9
* This library is distributed in the hope that it will be useful,
10
* but WITHOUT ANY WARRANTY; without even the implied warranty of
11
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12
* Lesser General Public License for more details.
14
* You should have received a copy of the GNU Lesser General Public
15
* License along with this library; if not, write to the Free Software
16
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19
#include "../dsputil.h"
20
#include "../mpegvideo.h"
24
#include "dsputil_altivec.h"
27
extern int dct_quantize_altivec(MpegEncContext *s,
28
DCTELEM *block, int n,
29
int qscale, int *overflow);
30
extern void dct_unquantize_h263_altivec(MpegEncContext *s,
31
DCTELEM *block, int n, int qscale);
33
extern void idct_put_altivec(uint8_t *dest, int line_size, int16_t *block);
34
extern void idct_add_altivec(uint8_t *dest, int line_size, int16_t *block);
37
void MPV_common_init_ppc(MpegEncContext *s)
42
if (s->avctx->lowres==0)
44
if ((s->avctx->idct_algo == FF_IDCT_AUTO) ||
45
(s->avctx->idct_algo == FF_IDCT_ALTIVEC))
47
s->dsp.idct_put = idct_put_altivec;
48
s->dsp.idct_add = idct_add_altivec;
49
#ifndef ALTIVEC_USE_REFERENCE_C_CODE
50
s->dsp.idct_permutation_type = FF_TRANSPOSE_IDCT_PERM;
51
#else /* ALTIVEC_USE_REFERENCE_C_CODE */
52
s->dsp.idct_permutation_type = FF_NO_IDCT_PERM;
53
#endif /* ALTIVEC_USE_REFERENCE_C_CODE */
57
// Test to make sure that the dct required alignments are met.
58
if ((((long)(s->q_intra_matrix) & 0x0f) != 0) ||
59
(((long)(s->q_inter_matrix) & 0x0f) != 0))
61
av_log(s->avctx, AV_LOG_INFO, "Internal Error: q-matrix blocks must be 16-byte aligned "
62
"to use Altivec DCT. Reverting to non-altivec version.\n");
66
if (((long)(s->intra_scantable.inverse) & 0x0f) != 0)
68
av_log(s->avctx, AV_LOG_INFO, "Internal Error: scan table blocks must be 16-byte aligned "
69
"to use Altivec DCT. Reverting to non-altivec version.\n");
74
if ((s->avctx->dct_algo == FF_DCT_AUTO) ||
75
(s->avctx->dct_algo == FF_DCT_ALTIVEC))
77
#if 0 /* seems to cause trouble under some circumstances */
78
s->dct_quantize = dct_quantize_altivec;
80
s->dct_unquantize_h263_intra = dct_unquantize_h263_altivec;
81
s->dct_unquantize_h263_inter = dct_unquantize_h263_altivec;
86
/* Non-AltiVec PPC optimisations here */