19a0729b4c
This patch lets e.g. dsputil_init chose dsp functions with respect to the bit depth to decode. The naming scheme of bit depth dependent functions is <base name>_<bit depth>[_<prefix>] (i.e. the old clear_blocks_c is now named clear_blocks_8_c). Note: Some of the functions for high bit depth is not dependent on the bit depth, but only on the pixel size. This leaves some room for optimizing binary size. Preparatory patch for high bit depth h264 decoding support. Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
107 lines
3.3 KiB
C
107 lines
3.3 KiB
C
/*
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* sh4 dsputil
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*
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* Copyright (c) 2003 BERO <bero@geocities.co.jp>
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavcodec/avcodec.h"
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#include "libavcodec/dsputil.h"
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#include "dsputil_sh4.h"
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#include "sh4.h"
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static void memzero_align8(void *dst,size_t size)
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{
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int fpscr;
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fp_single_enter(fpscr);
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dst = (char *)dst + size;
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size /= 32;
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__asm__ volatile (
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" fldi0 fr0\n"
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" fldi0 fr1\n"
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" fschg\n" // double
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"1: \n" \
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" dt %1\n"
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" fmov dr0,@-%0\n"
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" fmov dr0,@-%0\n"
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" fmov dr0,@-%0\n"
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" bf.s 1b\n"
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" fmov dr0,@-%0\n"
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" fschg" //back to single
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: "+r"(dst),"+r"(size) :: "memory" );
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fp_single_leave(fpscr);
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}
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static void clear_blocks_sh4(DCTELEM *blocks)
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{
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memzero_align8(blocks,sizeof(DCTELEM)*6*64);
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}
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static void idct_put(uint8_t *dest, int line_size, DCTELEM *block)
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{
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int i;
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uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
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idct_sh4(block);
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for(i=0;i<8;i++) {
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dest[0] = cm[block[0]];
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dest[1] = cm[block[1]];
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dest[2] = cm[block[2]];
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dest[3] = cm[block[3]];
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dest[4] = cm[block[4]];
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dest[5] = cm[block[5]];
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dest[6] = cm[block[6]];
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dest[7] = cm[block[7]];
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dest+=line_size;
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block+=8;
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}
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}
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static void idct_add(uint8_t *dest, int line_size, DCTELEM *block)
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{
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int i;
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uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
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idct_sh4(block);
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for(i=0;i<8;i++) {
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dest[0] = cm[dest[0]+block[0]];
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dest[1] = cm[dest[1]+block[1]];
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dest[2] = cm[dest[2]+block[2]];
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dest[3] = cm[dest[3]+block[3]];
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dest[4] = cm[dest[4]+block[4]];
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dest[5] = cm[dest[5]+block[5]];
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dest[6] = cm[dest[6]+block[6]];
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dest[7] = cm[dest[7]+block[7]];
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dest+=line_size;
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block+=8;
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}
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}
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void dsputil_init_sh4(DSPContext* c, AVCodecContext *avctx)
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{
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const int idct_algo= avctx->idct_algo;
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const int high_bit_depth = avctx->codec_id == CODEC_ID_H264 && avctx->bits_per_raw_sample > 8;
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dsputil_init_align(c,avctx);
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if (!high_bit_depth)
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c->clear_blocks = clear_blocks_sh4;
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if(idct_algo==FF_IDCT_AUTO || idct_algo==FF_IDCT_SH4){
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c->idct_put = idct_put;
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c->idct_add = idct_add;
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c->idct = idct_sh4;
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c->idct_permutation_type= FF_NO_IDCT_PERM;
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}
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}
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