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FFmpeg/libavcodec/qdm2_tablegen.h
Michael Niedermayer f884ef00de Merge remote-tracking branch 'qatar/master'
* 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>
2011-10-13 06:00:03 +02:00

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 */