mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-28 20:53:54 +02:00
8ef57a0d61
* commit '41ed7ab45fc693f7d7fc35664c0233f4c32d69bb': cosmetics: Fix spelling mistakes Merged-by: Clément Bœsch <u@pkh.me>
103 lines
3.0 KiB
C
103 lines
3.0 KiB
C
/*
|
|
* Optimization of some functions from mpegvideo.c for armv5te
|
|
* Copyright (c) 2007 Siarhei Siamashka <ssvb@users.sourceforge.net>
|
|
*
|
|
* 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 "libavutil/attributes.h"
|
|
#include "libavutil/avassert.h"
|
|
#include "libavcodec/avcodec.h"
|
|
#include "libavcodec/mpegvideo.h"
|
|
#include "mpegvideo_arm.h"
|
|
|
|
void ff_dct_unquantize_h263_armv5te(int16_t *block, int qmul, int qadd, int count);
|
|
|
|
#ifdef ENABLE_ARM_TESTS
|
|
/**
|
|
* H.263 dequantizer supplementary function, it is performance critical and needs to
|
|
* have optimized implementations for each architecture. Is also used as a reference
|
|
* implementation in regression tests
|
|
*/
|
|
static inline void dct_unquantize_h263_helper_c(int16_t *block, int qmul, int qadd, int count)
|
|
{
|
|
int i, level;
|
|
for (i = 0; i < count; i++) {
|
|
level = block[i];
|
|
if (level) {
|
|
if (level < 0) {
|
|
level = level * qmul - qadd;
|
|
} else {
|
|
level = level * qmul + qadd;
|
|
}
|
|
block[i] = level;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
static void dct_unquantize_h263_intra_armv5te(MpegEncContext *s,
|
|
int16_t *block, int n, int qscale)
|
|
{
|
|
int level, qmul, qadd;
|
|
int nCoeffs;
|
|
|
|
av_assert2(s->block_last_index[n]>=0);
|
|
|
|
qmul = qscale << 1;
|
|
|
|
if (!s->h263_aic) {
|
|
if (n < 4)
|
|
level = block[0] * s->y_dc_scale;
|
|
else
|
|
level = block[0] * s->c_dc_scale;
|
|
qadd = (qscale - 1) | 1;
|
|
}else{
|
|
qadd = 0;
|
|
level = block[0];
|
|
}
|
|
if(s->ac_pred)
|
|
nCoeffs=63;
|
|
else
|
|
nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ];
|
|
|
|
ff_dct_unquantize_h263_armv5te(block, qmul, qadd, nCoeffs + 1);
|
|
block[0] = level;
|
|
}
|
|
|
|
static void dct_unquantize_h263_inter_armv5te(MpegEncContext *s,
|
|
int16_t *block, int n, int qscale)
|
|
{
|
|
int qmul, qadd;
|
|
int nCoeffs;
|
|
|
|
av_assert2(s->block_last_index[n]>=0);
|
|
|
|
qadd = (qscale - 1) | 1;
|
|
qmul = qscale << 1;
|
|
|
|
nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ];
|
|
|
|
ff_dct_unquantize_h263_armv5te(block, qmul, qadd, nCoeffs + 1);
|
|
}
|
|
|
|
av_cold void ff_mpv_common_init_armv5te(MpegEncContext *s)
|
|
{
|
|
s->dct_unquantize_h263_intra = dct_unquantize_h263_intra_armv5te;
|
|
s->dct_unquantize_h263_inter = dct_unquantize_h263_inter_armv5te;
|
|
}
|