mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-07-16 09:21:39 +02:00
f884ef00de
* qatar/master: (31 commits) tiffenc: initialize forgotten avctx. avplay: free the active audio packet at exit. avplay: free rdft data used for spectrogram analysis. log.h: make AVClass a named struct fix ac3 encoder documentation vc1: more prettyprinting cosmetics vc1: prettyprint some tables vc1: K&R formatting cosmetics AVOptions: bump minor and add APIchanges entry. cmdutils/avtools: simplify show_help() by using av_opt_child_class_next() AVOptions: rename FF_OPT_TYPE_* => AV_OPT_TYPE_* Remove all uses of deprecated AVOptions API. AVOptions: add av_opt_next, deprecate av_next_option. AVOptions: add functions for evaluating option strings. AVOptions: split get_number(). AVOptions: add av_opt_get*, deprecate av_get*. AVOptions: add av_opt_set*(). AVOptions: add new API for enumerating children. rv34: move inverse transform functions to DSP context flvenc: Write the right metadata entry count ... Conflicts: avconv.c cmdutils.c doc/APIchanges ffplay.c ffprobe.c libavcodec/ac3dec.c libavcodec/h264.c libavcodec/libvpxenc.c libavcodec/libx264.c libavcodec/mpeg12enc.c libavcodec/options.c libavdevice/libdc1394.c libavdevice/v4l2.c libavfilter/vf_drawtext.c libavformat/flvdec.c libavformat/mpegtsenc.c libavformat/options.c libavutil/avutil.h libavutil/opt.c libswscale/utils.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
103 lines
3.3 KiB
C
103 lines
3.3 KiB
C
/*
|
|
* Header file for hardcoded QDM2 tables
|
|
*
|
|
* Copyright (c) 2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#ifndef AVCODEC_QDM2_TABLEGEN_H
|
|
#define AVCODEC_QDM2_TABLEGEN_H
|
|
|
|
#include <stdint.h>
|
|
#include <math.h>
|
|
#include "libavutil/attributes.h"
|
|
|
|
#define SOFTCLIP_THRESHOLD 27600
|
|
#define HARDCLIP_THRESHOLD 35716
|
|
|
|
#if CONFIG_HARDCODED_TABLES
|
|
#define softclip_table_init()
|
|
#define rnd_table_init()
|
|
#define init_noise_samples()
|
|
#include "libavcodec/qdm2_tables.h"
|
|
#else
|
|
static uint16_t softclip_table[HARDCLIP_THRESHOLD - SOFTCLIP_THRESHOLD + 1];
|
|
static float noise_table[4096];
|
|
static uint8_t random_dequant_index[256][5];
|
|
static uint8_t random_dequant_type24[128][3];
|
|
static float noise_samples[128];
|
|
|
|
static av_cold void softclip_table_init(void) {
|
|
int i;
|
|
double dfl = SOFTCLIP_THRESHOLD - 32767;
|
|
float delta = 1.0 / -dfl;
|
|
for (i = 0; i < HARDCLIP_THRESHOLD - SOFTCLIP_THRESHOLD + 1; i++)
|
|
softclip_table[i] = SOFTCLIP_THRESHOLD - ((int)(sin((float)i * delta) * dfl) & 0x0000FFFF);
|
|
}
|
|
|
|
|
|
// random generated table
|
|
static av_cold void rnd_table_init(void) {
|
|
int i,j;
|
|
uint32_t ldw,hdw;
|
|
uint64_t tmp64_1;
|
|
uint64_t random_seed = 0;
|
|
float delta = 1.0 / 16384.0;
|
|
for(i = 0; i < 4096 ;i++) {
|
|
random_seed = random_seed * 214013 + 2531011;
|
|
noise_table[i] = (delta * (float)(((int32_t)random_seed >> 16) & 0x00007FFF)- 1.0) * 1.3;
|
|
}
|
|
|
|
for (i = 0; i < 256 ;i++) {
|
|
random_seed = 81;
|
|
ldw = i;
|
|
for (j = 0; j < 5 ;j++) {
|
|
random_dequant_index[i][j] = (uint8_t)((ldw / random_seed) & 0xFF);
|
|
ldw = (uint32_t)ldw % (uint32_t)random_seed;
|
|
tmp64_1 = (random_seed * 0x55555556);
|
|
hdw = (uint32_t)(tmp64_1 >> 32);
|
|
random_seed = (uint64_t)(hdw + (ldw >> 31));
|
|
}
|
|
}
|
|
for (i = 0; i < 128 ;i++) {
|
|
random_seed = 25;
|
|
ldw = i;
|
|
for (j = 0; j < 3 ;j++) {
|
|
random_dequant_type24[i][j] = (uint8_t)((ldw / random_seed) & 0xFF);
|
|
ldw = (uint32_t)ldw % (uint32_t)random_seed;
|
|
tmp64_1 = (random_seed * 0x66666667);
|
|
hdw = (uint32_t)(tmp64_1 >> 33);
|
|
random_seed = hdw + (ldw >> 31);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static av_cold void init_noise_samples(void) {
|
|
int i;
|
|
unsigned random_seed = 0;
|
|
float delta = 1.0 / 16384.0;
|
|
for (i = 0; i < 128;i++) {
|
|
random_seed = random_seed * 214013 + 2531011;
|
|
noise_samples[i] = (delta * (float)((random_seed >> 16) & 0x00007fff) - 1.0);
|
|
}
|
|
}
|
|
#endif /* CONFIG_HARDCODED_TABLES */
|
|
|
|
#endif /* AVCODEC_QDM2_TABLEGEN_H */
|