Statistics
| Branch: | Revision:

ffmpeg / libavcodec / ppc / mpegvideo_ppc.c @ b420448e

History | View | Annotate | Download (2.87 KB)

1
/*
2
 * Copyright (c) 2002 Dieter Shirley
3
 *
4
 * This file is part of FFmpeg.
5
 *
6
 * FFmpeg is free software; you can redistribute it and/or
7
 * modify it under the terms of the GNU Lesser General Public
8
 * License as published by the Free Software Foundation; either
9
 * version 2.1 of the License, or (at your option) any later version.
10
 *
11
 * FFmpeg is distributed in the hope that it will be useful,
12
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14
 * Lesser General Public License for more details.
15
 *
16
 * You should have received a copy of the GNU Lesser General Public
17
 * License along with FFmpeg; if not, write to the Free Software
18
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19
 */
20

    
21
#include "../dsputil.h"
22
#include "../mpegvideo.h"
23
#include <time.h>
24

    
25
#ifdef HAVE_ALTIVEC
26
#include "dsputil_altivec.h"
27
#endif
28

    
29
extern int dct_quantize_altivec(MpegEncContext *s,
30
        DCTELEM *block, int n,
31
        int qscale, int *overflow);
32
extern void dct_unquantize_h263_altivec(MpegEncContext *s,
33
                                        DCTELEM *block, int n, int qscale);
34

    
35
extern void idct_put_altivec(uint8_t *dest, int line_size, int16_t *block);
36
extern void idct_add_altivec(uint8_t *dest, int line_size, int16_t *block);
37

    
38

    
39
void MPV_common_init_ppc(MpegEncContext *s)
40
{
41
#ifdef HAVE_ALTIVEC
42
    if (has_altivec())
43
    {
44
      if (s->avctx->lowres==0)
45
      {
46
        if ((s->avctx->idct_algo == FF_IDCT_AUTO) ||
47
                (s->avctx->idct_algo == FF_IDCT_ALTIVEC))
48
        {
49
            s->dsp.idct_put = idct_put_altivec;
50
            s->dsp.idct_add = idct_add_altivec;
51
            s->dsp.idct_permutation_type = FF_TRANSPOSE_IDCT_PERM;
52
        }
53
      }
54

    
55
        // Test to make sure that the dct required alignments are met.
56
        if ((((long)(s->q_intra_matrix) & 0x0f) != 0) ||
57
                (((long)(s->q_inter_matrix) & 0x0f) != 0))
58
        {
59
            av_log(s->avctx, AV_LOG_INFO, "Internal Error: q-matrix blocks must be 16-byte aligned "
60
                    "to use Altivec DCT. Reverting to non-altivec version.\n");
61
            return;
62
        }
63

    
64
        if (((long)(s->intra_scantable.inverse) & 0x0f) != 0)
65
        {
66
            av_log(s->avctx, AV_LOG_INFO, "Internal Error: scan table blocks must be 16-byte aligned "
67
                    "to use Altivec DCT. Reverting to non-altivec version.\n");
68
            return;
69
        }
70

    
71

    
72
        if ((s->avctx->dct_algo == FF_DCT_AUTO) ||
73
                (s->avctx->dct_algo == FF_DCT_ALTIVEC))
74
        {
75
#if 0 /* seems to cause trouble under some circumstances */
76
            s->dct_quantize = dct_quantize_altivec;
77
#endif
78
            s->dct_unquantize_h263_intra = dct_unquantize_h263_altivec;
79
            s->dct_unquantize_h263_inter = dct_unquantize_h263_altivec;
80
        }
81
    } else
82
#endif
83
    {
84
        /* Non-AltiVec PPC optimisations here */
85
    }
86
}
87