2 * Copyright (c) 2000,2001 Fabrice Bellard.
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
18 * MMI optimization by Leon van Stuivenberg <leonvs@iae.nl>
21 #include "../dsputil.h"
22 #include "../mpegvideo.h"
23 #include "../avcodec.h"
25 void ff_mmi_idct_put(UINT8 *dest, int line_size, DCTELEM *block);
26 void ff_mmi_idct_add(UINT8 *dest, int line_size, DCTELEM *block);
29 static void dct_unquantize_h263_mmi(MpegEncContext *s,
30 DCTELEM *block, int n, int qscale)
32 int level=0, qmul, qadd;
35 assert(s->block_last_index[n]>=0);
37 qadd = (qscale - 1) | 1;
43 level = block[0] * s->y_dc_scale;
45 level = block[0] * s->c_dc_scale;
50 nCoeffs= 63; //does not allways use zigzag table
52 nCoeffs= s->intra_scantable.raster_end[ s->block_last_index[n] ];
56 "add $14, $0, %3 \n\t"
57 "pcpyld $8, %0, %0 \n\t"
58 "pcpyh $8, $8 \n\t" //r8 = qmul
59 "pcpyld $9, %1, %1 \n\t"
60 "pcpyh $9, $9 \n\t" //r9 = qadd
63 "lq $10, 0($14) \n\t" //r10 = level
64 "addi $14, $14, 16 \n\t" //block+=8
65 "addi %2, %2, -8 \n\t"
66 "pcgth $11, $0, $10 \n\t" //r11 = level < 0 ? -1 : 0
67 "pcgth $12, $10, $0 \n\t" //r12 = level > 0 ? -1 : 0
68 "por $12, $11, $12 \n\t"
69 "pmulth $10, $10, $8 \n\t"
70 "paddh $13, $9, $11 \n\t"
71 "pxor $13, $13, $11 \n\t" //r13 = level < 0 ? -qadd : qadd
73 "pinteh $10, $11, $10 \n\t" //r10 = level * qmul
74 "paddh $10, $10, $13 \n\t"
75 "pand $10, $10, $12 \n\t"
76 "sq $10, -16($14) \n\t"
78 :: "r"(qmul), "r" (qadd), "r" (nCoeffs), "r" (block) : "$8", "$9", "$10", "$11", "$12", "$13", "$14", "memory" );
85 void MPV_common_init_mmi(MpegEncContext *s)
88 const int idct_algo= s->avctx->idct_algo;
90 if(idct_algo==FF_IDCT_AUTO || idct_algo==FF_IDCT_PS2){
91 s->idct_put= ff_mmi_idct_put;
92 s->idct_add= ff_mmi_idct_add;
93 s->idct_permutation_type= FF_LIBMPEG2_IDCT_PERM;
95 s->dct_unquantize_h263 = dct_unquantize_h263_mmi;