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FFmpeg/libavcodec/mlpdsp.c
Michael Niedermayer 0aa095483d Merge commit '6fee1b90ce3bf4fbdfde7016e0890057c9000487'
* commit '6fee1b90ce3bf4fbdfde7016e0890057c9000487':
  avcodec: Add av_cold attributes to init functions missing them

Conflicts:
	libavcodec/aacpsy.c
	libavcodec/atrac3.c
	libavcodec/dvdsubdec.c
	libavcodec/ffv1.c
	libavcodec/ffv1enc.c
	libavcodec/h261enc.c
	libavcodec/h264_parser.c
	libavcodec/h264dsp.c
	libavcodec/h264pred.c
	libavcodec/libschroedingerenc.c
	libavcodec/libxvid_rc.c
	libavcodec/mpeg12.c
	libavcodec/mpeg12enc.c
	libavcodec/proresdsp.c
	libavcodec/rangecoder.c
	libavcodec/videodsp.c
	libavcodec/x86/proresdsp_init.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
2013-05-05 11:34:29 +02:00

66 lines
2.1 KiB
C

/*
* Copyright (c) 2007-2008 Ian Caulfield
* 2009 Ramiro Polla
*
* 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 "config.h"
#include "libavutil/attributes.h"
#include "mlpdsp.h"
#include "mlp.h"
static void mlp_filter_channel(int32_t *state, const int32_t *coeff,
int firorder, int iirorder,
unsigned int filter_shift, int32_t mask,
int blocksize, int32_t *sample_buffer)
{
int32_t *firbuf = state;
int32_t *iirbuf = state + MAX_BLOCKSIZE + MAX_FIR_ORDER;
const int32_t *fircoeff = coeff;
const int32_t *iircoeff = coeff + MAX_FIR_ORDER;
int i;
for (i = 0; i < blocksize; i++) {
int32_t residual = *sample_buffer;
unsigned int order;
int64_t accum = 0;
int32_t result;
for (order = 0; order < firorder; order++)
accum += (int64_t) firbuf[order] * fircoeff[order];
for (order = 0; order < iirorder; order++)
accum += (int64_t) iirbuf[order] * iircoeff[order];
accum = accum >> filter_shift;
result = (accum + residual) & mask;
*--firbuf = result;
*--iirbuf = result - accum;
*sample_buffer = result;
sample_buffer += MAX_CHANNELS;
}
}
av_cold void ff_mlpdsp_init(MLPDSPContext *c)
{
c->mlp_filter_channel = mlp_filter_channel;
if (ARCH_X86)
ff_mlpdsp_init_x86(c);
}