Statistics
| Branch: | Revision:

ffmpeg / libavcodec / ppc / mpegvideo_ppc.c @ a1d0b6a2

History | View | Annotate | Download (2.62 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
#include "dsputil_altivec.h"
25

    
26
extern int dct_quantize_altivec(MpegEncContext *s,
27
        DCTELEM *block, int n,
28
        int qscale, int *overflow);
29
extern void dct_unquantize_h263_altivec(MpegEncContext *s,
30
                                        DCTELEM *block, int n, int qscale);
31

    
32
extern void idct_put_altivec(uint8_t *dest, int line_size, int16_t *block);
33
extern void idct_add_altivec(uint8_t *dest, int line_size, int16_t *block);
34

    
35

    
36
void MPV_common_init_ppc(MpegEncContext *s)
37
{
38
    if (s->avctx->lowres==0)
39
    {
40
        if ((s->avctx->idct_algo == FF_IDCT_AUTO) ||
41
                (s->avctx->idct_algo == FF_IDCT_ALTIVEC))
42
        {
43
            s->dsp.idct_put = idct_put_altivec;
44
            s->dsp.idct_add = idct_add_altivec;
45
            s->dsp.idct_permutation_type = FF_TRANSPOSE_IDCT_PERM;
46
        }
47
    }
48

    
49
    // Test to make sure that the dct required alignments are met.
50
    if ((((long)(s->q_intra_matrix) & 0x0f) != 0) ||
51
        (((long)(s->q_inter_matrix) & 0x0f) != 0))
52
    {
53
        av_log(s->avctx, AV_LOG_INFO, "Internal Error: q-matrix blocks must be 16-byte aligned "
54
                "to use AltiVec DCT. Reverting to non-AltiVec version.\n");
55
        return;
56
    }
57

    
58
    if (((long)(s->intra_scantable.inverse) & 0x0f) != 0)
59
    {
60
        av_log(s->avctx, AV_LOG_INFO, "Internal Error: scan table blocks must be 16-byte aligned "
61
                "to use AltiVec DCT. Reverting to non-AltiVec version.\n");
62
        return;
63
    }
64

    
65

    
66
    if ((s->avctx->dct_algo == FF_DCT_AUTO) ||
67
            (s->avctx->dct_algo == FF_DCT_ALTIVEC))
68
    {
69
#if 0 /* seems to cause trouble under some circumstances */
70
        s->dct_quantize = dct_quantize_altivec;
71
#endif
72
        s->dct_unquantize_h263_intra = dct_unquantize_h263_altivec;
73
        s->dct_unquantize_h263_inter = dct_unquantize_h263_altivec;
74
    }
75
}
76