| 1 | /*
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| 2 | * Copyright (c) 2002 Dieter Shirley
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| 3 | *
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| 4 | * This library is free software; you can redistribute it and/or
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| 5 | * modify it under the terms of the GNU Lesser General Public
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| 6 | * License as published by the Free Software Foundation; either
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| 7 | * version 2 of the License, or (at your option) any later version.
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| 8 | *
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| 9 | * This library is distributed in the hope that it will be useful,
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| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 12 | * Lesser General Public License for more details.
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| 13 | *
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| 14 | * You should have received a copy of the GNU Lesser General Public
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| 15 | * License along with this library; if not, write to the Free Software
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| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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| 17 | */
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| 18 |
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| 19 | #include "../dsputil.h"
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| 20 | #include "../mpegvideo.h"
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| 21 | #include <time.h>
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| 22 |
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| 23 | #ifdef HAVE_ALTIVEC
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| 24 | #include "dsputil_altivec.h"
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| 25 | #endif
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| 26 |
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| 27 | extern int dct_quantize_altivec(MpegEncContext *s,
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| 28 | DCTELEM *block, int n,
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| 29 | int qscale, int *overflow);
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| 30 | extern void dct_unquantize_h263_altivec(MpegEncContext *s,
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| 31 | DCTELEM *block, int n, int qscale);
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| 32 |
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| 33 | extern void idct_put_altivec(uint8_t *dest, int line_size, int16_t *block);
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| 34 | extern void idct_add_altivec(uint8_t *dest, int line_size, int16_t *block);
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| 35 |
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| 36 |
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| 37 | void MPV_common_init_ppc(MpegEncContext *s)
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| 38 | {
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| 39 | #ifdef HAVE_ALTIVEC
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| 40 | if (has_altivec())
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| 41 | {
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| 42 | if (s->avctx->lowres==0)
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| 43 | {
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| 44 | if ((s->avctx->idct_algo == FF_IDCT_AUTO) ||
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| 45 | (s->avctx->idct_algo == FF_IDCT_ALTIVEC))
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| 46 | {
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| 47 | s->dsp.idct_put = idct_put_altivec;
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| 48 | s->dsp.idct_add = idct_add_altivec;
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| 49 | #ifndef ALTIVEC_USE_REFERENCE_C_CODE
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| 50 | s->dsp.idct_permutation_type = FF_TRANSPOSE_IDCT_PERM;
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| 51 | #else /* ALTIVEC_USE_REFERENCE_C_CODE */
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| 52 | s->dsp.idct_permutation_type = FF_NO_IDCT_PERM;
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| 53 | #endif /* ALTIVEC_USE_REFERENCE_C_CODE */
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| 54 | }
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| 55 | }
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| 56 |
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| 57 | // Test to make sure that the dct required alignments are met.
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| 58 | if ((((long)(s->q_intra_matrix) & 0x0f) != 0) ||
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| 59 | (((long)(s->q_inter_matrix) & 0x0f) != 0))
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| 60 | {
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| 61 | av_log(s->avctx, AV_LOG_INFO, "Internal Error: q-matrix blocks must be 16-byte aligned "
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| 62 | "to use Altivec DCT. Reverting to non-altivec version.\n");
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| 63 | return;
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| 64 | }
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| 65 |
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| 66 | if (((long)(s->intra_scantable.inverse) & 0x0f) != 0)
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| 67 | {
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| 68 | av_log(s->avctx, AV_LOG_INFO, "Internal Error: scan table blocks must be 16-byte aligned "
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| 69 | "to use Altivec DCT. Reverting to non-altivec version.\n");
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| 70 | return;
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| 71 | }
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| 72 |
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| 73 |
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| 74 | if ((s->avctx->dct_algo == FF_DCT_AUTO) ||
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| 75 | (s->avctx->dct_algo == FF_DCT_ALTIVEC))
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| 76 | {
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| 77 | #if 0 /* seems to cause trouble under some circumstances */
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| 78 | s->dct_quantize = dct_quantize_altivec;
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| 79 | #endif
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| 80 | s->dct_unquantize_h263_intra = dct_unquantize_h263_altivec;
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| 81 | s->dct_unquantize_h263_inter = dct_unquantize_h263_altivec;
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| 82 | }
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| 83 | } else
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| 84 | #endif
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| 85 | {
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| 86 | /* Non-AltiVec PPC optimisations here */
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| 87 | }
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| 88 | }
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| 89 |
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