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 */