2 * Copyright (c) 2002 Dieter Shirley
4 * This file is part of FFmpeg.
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.
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.
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
22 #include "mpegvideo.h"
26 #include "dsputil_altivec.h"
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);
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);
39 void MPV_common_init_ppc(MpegEncContext *s)
44 if (s->avctx->lowres==0)
46 if ((s->avctx->idct_algo == FF_IDCT_AUTO) ||
47 (s->avctx->idct_algo == FF_IDCT_ALTIVEC))
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;
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))
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");
64 if (((long)(s->intra_scantable.inverse) & 0x0f) != 0)
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");
72 if ((s->avctx->dct_algo == FF_DCT_AUTO) ||
73 (s->avctx->dct_algo == FF_DCT_ALTIVEC))
75 #if 0 /* seems to cause trouble under some circumstances */
76 s->dct_quantize = dct_quantize_altivec;
78 s->dct_unquantize_h263_intra = dct_unquantize_h263_altivec;
79 s->dct_unquantize_h263_inter = dct_unquantize_h263_altivec;
84 /* Non-AltiVec PPC optimisations here */