mirror of
https://gitee.com/openharmony/third_party_ffmpeg
synced 2024-11-23 19:30:05 +00:00
def3c83e1b
This uses ff_exp2fi to get a speedup (~ 6x). sample benchmark (Haswell, GNU/Linux): old: 19102 decicycles in sbr_dequant, 1023 runs, 1 skips 19002 decicycles in sbr_dequant, 2045 runs, 3 skips 17638 decicycles in sbr_dequant, 4093 runs, 3 skips 15825 decicycles in sbr_dequant, 8189 runs, 3 skips 16404 decicycles in sbr_dequant, 16379 runs, 5 skips new: 3063 decicycles in sbr_dequant, 1024 runs, 0 skips 3049 decicycles in sbr_dequant, 2048 runs, 0 skips 2968 decicycles in sbr_dequant, 4096 runs, 0 skips 2818 decicycles in sbr_dequant, 8191 runs, 1 skips 2853 decicycles in sbr_dequant, 16383 runs, 1 skips Reviewed-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com> Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
97 lines
3.0 KiB
C
97 lines
3.0 KiB
C
/*
|
|
* AAC Spectral Band Replication function declarations
|
|
* Copyright (c) 2008-2009 Robert Swain ( rob opendot cl )
|
|
* Copyright (c) 2010 Alex Converse <alex.converse@gmail.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
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* AAC Spectral Band Replication function declarations
|
|
* @author Robert Swain ( rob opendot cl )
|
|
*/
|
|
|
|
#ifndef AVCODEC_AACSBR_H
|
|
#define AVCODEC_AACSBR_H
|
|
|
|
#include "get_bits.h"
|
|
#include "aac.h"
|
|
#include "sbr.h"
|
|
|
|
#define ENVELOPE_ADJUSTMENT_OFFSET 2
|
|
#define NOISE_FLOOR_OFFSET 6
|
|
|
|
/**
|
|
* SBR VLC tables
|
|
*/
|
|
enum {
|
|
T_HUFFMAN_ENV_1_5DB,
|
|
F_HUFFMAN_ENV_1_5DB,
|
|
T_HUFFMAN_ENV_BAL_1_5DB,
|
|
F_HUFFMAN_ENV_BAL_1_5DB,
|
|
T_HUFFMAN_ENV_3_0DB,
|
|
F_HUFFMAN_ENV_3_0DB,
|
|
T_HUFFMAN_ENV_BAL_3_0DB,
|
|
F_HUFFMAN_ENV_BAL_3_0DB,
|
|
T_HUFFMAN_NOISE_3_0DB,
|
|
T_HUFFMAN_NOISE_BAL_3_0DB,
|
|
};
|
|
|
|
/**
|
|
* bs_frame_class - frame class of current SBR frame (14496-3 sp04 p98)
|
|
*/
|
|
enum {
|
|
FIXFIX,
|
|
FIXVAR,
|
|
VARFIX,
|
|
VARVAR,
|
|
};
|
|
|
|
enum {
|
|
EXTENSION_ID_PS = 2,
|
|
};
|
|
|
|
static const int8_t vlc_sbr_lav[10] =
|
|
{ 60, 60, 24, 24, 31, 31, 12, 12, 31, 12 };
|
|
|
|
#define SBR_INIT_VLC_STATIC(num, size) \
|
|
INIT_VLC_STATIC(&vlc_sbr[num], 9, sbr_tmp[num].table_size / sbr_tmp[num].elem_size, \
|
|
sbr_tmp[num].sbr_bits , 1, 1, \
|
|
sbr_tmp[num].sbr_codes, sbr_tmp[num].elem_size, sbr_tmp[num].elem_size, \
|
|
size)
|
|
|
|
#define SBR_VLC_ROW(name) \
|
|
{ name ## _codes, name ## _bits, sizeof(name ## _codes), sizeof(name ## _codes[0]) }
|
|
|
|
/** Initialize SBR. */
|
|
void AAC_RENAME(ff_aac_sbr_init)(void);
|
|
/** Initialize one SBR context. */
|
|
void AAC_RENAME(ff_aac_sbr_ctx_init)(AACContext *ac, SpectralBandReplication *sbr);
|
|
/** Close one SBR context. */
|
|
void AAC_RENAME(ff_aac_sbr_ctx_close)(SpectralBandReplication *sbr);
|
|
/** Decode one SBR element. */
|
|
int AAC_RENAME(ff_decode_sbr_extension)(AACContext *ac, SpectralBandReplication *sbr,
|
|
GetBitContext *gb, int crc, int cnt, int id_aac);
|
|
/** Apply one SBR element to one AAC element. */
|
|
void AAC_RENAME(ff_sbr_apply)(AACContext *ac, SpectralBandReplication *sbr, int id_aac,
|
|
INTFLOAT* L, INTFLOAT *R);
|
|
|
|
void ff_aacsbr_func_ptr_init_mips(AACSBRContext *c);
|
|
|
|
#endif /* AVCODEC_AACSBR_H */
|