| 1 | /*
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| 2 | * Copyright (c) 2000,2001 Fabrice Bellard.
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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 | * MMI optimization by Leon van Stuivenberg
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| 19 | */
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| 20 |
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| 21 | #include "../dsputil.h"
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| 22 | #include "../mpegvideo.h"
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| 23 | #include "../avcodec.h"
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| 24 |
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| 25 | static void dct_unquantize_h263_mmi(MpegEncContext *s,
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| 26 | DCTELEM *block, int n, int qscale)
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| 27 | {
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| 28 | int level=0, qmul, qadd;
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| 29 | int nCoeffs;
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| 30 |
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| 31 | assert(s->block_last_index[n]>=0);
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| 32 |
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| 33 | qadd = (qscale - 1) | 1;
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| 34 | qmul = qscale << 1;
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| 35 |
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| 36 | if (s->mb_intra) {
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| 37 | if (!s->h263_aic) {
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| 38 | if (n < 4)
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| 39 | level = block[0] * s->y_dc_scale;
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| 40 | else
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| 41 | level = block[0] * s->c_dc_scale;
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| 42 | }else {
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| 43 | qadd = 0;
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| 44 | level = block[0];
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| 45 | }
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| 46 | nCoeffs= 63; //does not allways use zigzag table
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| 47 | } else {
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| 48 | nCoeffs= s->intra_scantable.raster_end[ s->block_last_index[n] ];
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| 49 | }
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| 50 |
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| 51 | asm volatile(
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| 52 | "add $14, $0, %3 \n\t"
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| 53 | "pcpyld $8, %0, %0 \n\t"
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| 54 | "pcpyh $8, $8 \n\t" //r8 = qmul
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| 55 | "pcpyld $9, %1, %1 \n\t"
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| 56 | "pcpyh $9, $9 \n\t" //r9 = qadd
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| 57 | ".p2align 2 \n\t"
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| 58 | "1: \n\t"
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| 59 | "lq $10, 0($14) \n\t" //r10 = level
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| 60 | "addi $14, $14, 16 \n\t" //block+=8
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| 61 | "addi %2, %2, -8 \n\t"
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| 62 | "pcgth $11, $0, $10 \n\t" //r11 = level < 0 ? -1 : 0
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| 63 | "pcgth $12, $10, $0 \n\t" //r12 = level > 0 ? -1 : 0
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| 64 | "por $12, $11, $12 \n\t"
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| 65 | "pmulth $10, $10, $8 \n\t"
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| 66 | "paddh $13, $9, $11 \n\t"
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| 67 | "pxor $13, $13, $11 \n\t" //r13 = level < 0 ? -qadd : qadd
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| 68 | "pmfhl.uw $11 \n\t"
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| 69 | "pinteh $10, $11, $10 \n\t" //r10 = level * qmul
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| 70 | "paddh $10, $10, $13 \n\t"
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| 71 | "pand $10, $10, $12 \n\t"
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| 72 | "sq $10, -16($14) \n\t"
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| 73 | "bgez %2, 1b \n\t"
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| 74 | :: "r"(qmul), "r" (qadd), "r" (nCoeffs), "r" (block) : "$8", "$9", "$10", "$11", "$12", "$13", "$14", "memory" );
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| 75 |
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| 76 | if(s->mb_intra)
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| 77 | block[0]= level;
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| 78 | }
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| 79 |
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| 80 |
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| 81 | void MPV_common_init_mmi(MpegEncContext *s)
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| 82 | {
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| 83 | s->dct_unquantize_h263_intra =
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| 84 | s->dct_unquantize_h263_inter = dct_unquantize_h263_mmi;
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| 85 | }
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| 86 |
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| 87 |
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