mirror of https://git.ffmpeg.org/ffmpeg.git
153 lines
5.4 KiB
C
153 lines
5.4 KiB
C
/*
|
|
* BlackFin MPEGVIDEO OPTIMIZATIONS
|
|
*
|
|
* Copyright (C) 2007 Marc Hoffman <mmh@pleasantst.com>
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "dsputil.h"
|
|
#include "mpegvideo.h"
|
|
#include "avcodec.h"
|
|
#include "dsputil_bfin.h"
|
|
|
|
|
|
extern void ff_bfin_fdct (DCTELEM *block) attribute_l1_text;
|
|
|
|
|
|
static int dct_quantize_bfin (MpegEncContext *s,
|
|
DCTELEM *block, int n,
|
|
int qscale, int *overflow)
|
|
{
|
|
int last_non_zero, q, start_i;
|
|
const short *qmat;
|
|
short *bias;
|
|
const uint8_t *scantable= s->intra_scantable.scantable;
|
|
short dc;
|
|
int max=0;
|
|
|
|
PROF("fdct",0);
|
|
ff_bfin_fdct (block);
|
|
EPROF();
|
|
|
|
PROF("denoise",1);
|
|
if(s->dct_error_sum)
|
|
s->denoise_dct(s, block);
|
|
EPROF();
|
|
|
|
PROF("quant-init",2);
|
|
if (s->mb_intra) {
|
|
if (!s->h263_aic) {
|
|
if (n < 4)
|
|
q = s->y_dc_scale;
|
|
else
|
|
q = s->c_dc_scale;
|
|
q = q << 3;
|
|
} else
|
|
/* For AIC we skip quant/dequant of INTRADC */
|
|
q = 1 << 3;
|
|
|
|
/* note: block[0] is assumed to be positive */
|
|
dc = block[0] = (block[0] + (q >> 1)) / q;
|
|
start_i = 1;
|
|
last_non_zero = 0;
|
|
bias = s->q_intra_matrix16[qscale][1];
|
|
qmat = s->q_intra_matrix16[qscale][0];
|
|
|
|
} else {
|
|
start_i = 0;
|
|
last_non_zero = -1;
|
|
bias = s->q_inter_matrix16[qscale][1];
|
|
qmat = s->q_inter_matrix16[qscale][0];
|
|
|
|
}
|
|
EPROF();
|
|
|
|
PROF("quantize",4);
|
|
|
|
/* for(i=start_i; i<64; i++) { */
|
|
/* sign = (block[i]>>15)|1; */
|
|
/* level = ((abs(block[i])+bias[0])*qmat[i])>>16; */
|
|
/* if (level < 0) level = 0; */
|
|
/* max |= level; */
|
|
/* level = level * sign; */
|
|
/* block[i] = level; */
|
|
/* } */
|
|
|
|
asm volatile
|
|
("i2=%1;\n\t"
|
|
"r1=[%1++]; \n\t"
|
|
"r0=r1>>>15 (v); \n\t"
|
|
"lsetup (0f,1f) lc0=%3; \n\t"
|
|
"0: r0=r0|%4; \n\t"
|
|
" r1=abs r1 (v) || r2=[%2++];\n\t"
|
|
" r1=r1+|+%5; \n\t"
|
|
" r1=max(r1,%6) (v); \n\t"
|
|
" r1.h=(a1 =r1.h*r2.h), r1.l=(a0 =r1.l*r2.l) (tfu); \n\t"
|
|
" %0=%0|r1; \n\t"
|
|
" r0.h=(a1 =r1.h*r0.h), r0.l=(a0 =r1.l*r0.l) (is) || r1=[%1++];\n\t"
|
|
"1: r0=r1>>>15 (v) || [i2++]=r0;\n\t"
|
|
"r1=%0>>16; \n\t"
|
|
"%0=%0|r1; \n\t"
|
|
"%0.h=0; \n\t"
|
|
: "=&d" (max)
|
|
: "b" (block), "b" (qmat), "a" (32), "d" (0x00010001), "d" (bias[0]*0x10001), "d" (0)
|
|
: "R0","R1","R2", "I2");
|
|
if (start_i == 1) block[0] = dc;
|
|
|
|
EPROF();
|
|
|
|
|
|
PROF("zzscan",5);
|
|
|
|
asm volatile
|
|
("r0=b[%1--] (x); \n\t"
|
|
"lsetup (0f,1f) lc0=%3; \n\t" /* for(i=63; i>=start_i; i--) { */
|
|
"0: p0=r0; \n\t" /* j = scantable[i]; */
|
|
" p0=%2+(p0<<1); \n\t" /* if (block[j]) { */
|
|
" r0=w[p0]; \n\t" /* last_non_zero = i; */
|
|
" cc=r0==0; \n\t" /* break; */
|
|
" if !cc jump 2f; \n\t" /* } */
|
|
"1: r0=b[%1--] (x); \n\t" /* } */
|
|
" %0=%4; \n\t"
|
|
" jump 3f; \n\t"
|
|
"2: %0=lc0; \n\t"
|
|
"3:\n\t"
|
|
|
|
: "=d" (last_non_zero)
|
|
: "a" (scantable+63), "a" (block), "a" (63), "d" (last_non_zero)
|
|
: "P0","R0");
|
|
|
|
EPROF();
|
|
|
|
*overflow= s->max_qcoeff < max; //overflow might have happened
|
|
|
|
bfprof();
|
|
|
|
/* we need this permutation so that we correct the IDCT, we only permute the !=0 elements */
|
|
if (s->dsp.idct_permutation_type != FF_NO_IDCT_PERM)
|
|
ff_block_permute(block, s->dsp.idct_permutation, scantable, last_non_zero);
|
|
|
|
return last_non_zero;
|
|
}
|
|
|
|
void MPV_common_init_bfin (MpegEncContext *s)
|
|
{
|
|
s->dct_quantize= dct_quantize_bfin;
|
|
}
|
|
|