31ab1575e5
* qatar/master: avcodec: Convert some commented-out printf/av_log instances to av_dlog avcodec: Drop silly and/or broken printf debug output avcodec: Drop some silly commented-out av_log() invocations avformat: Convert some commented-out printf/av_log instances to av_dlog avformat: Remove non-compiling and/or silly commented-out printf/av_log statements Remove some silly disabled code. ac3dec: ensure get_buffer() gets a buffer for the correct number of channels Conflicts: libavcodec/dnxhddec.c libavcodec/ffv1.c libavcodec/h264.c libavcodec/h264_parser.c libavcodec/mjpegdec.c libavcodec/motion_est_template.c libavcodec/mpegaudiodec.c libavcodec/mpegvideo_enc.c libavcodec/put_bits.h libavcodec/ratecontrol.c libavcodec/wmaenc.c libavdevice/timefilter.c libavformat/asfdec.c libavformat/avidec.c libavformat/avienc.c libavformat/flvenc.c libavformat/utils.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
88 lines
2.9 KiB
C
88 lines
2.9 KiB
C
/*
|
|
* JPEG-LS common code
|
|
* Copyright (c) 2003 Michael Niedermayer
|
|
* Copyright (c) 2006 Konstantin Shishkov
|
|
*
|
|
* 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
|
|
* JPEG-LS common code.
|
|
*/
|
|
|
|
#include "jpegls.h"
|
|
|
|
void ff_jpegls_init_state(JLSState *state){
|
|
int i;
|
|
|
|
state->twonear = state->near * 2 + 1;
|
|
state->range = ((state->maxval + state->twonear - 1) / state->twonear) + 1;
|
|
|
|
// QBPP = ceil(log2(RANGE))
|
|
for(state->qbpp = 0; (1 << state->qbpp) < state->range; state->qbpp++);
|
|
|
|
state->bpp = FFMAX(av_log2(state->maxval)+1, 2);
|
|
state->limit = 2*(state->bpp + FFMAX(state->bpp, 8)) - state->qbpp;
|
|
|
|
for(i = 0; i < 367; i++) {
|
|
state->A[i] = FFMAX((state->range + 32) >> 6, 2);
|
|
state->N[i] = 1;
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* Custom value clipping function used in T1, T2, T3 calculation
|
|
*/
|
|
static inline int iso_clip(int v, int vmin, int vmax){
|
|
if(v > vmax || v < vmin) return vmin;
|
|
else return v;
|
|
}
|
|
|
|
void ff_jpegls_reset_coding_parameters(JLSState *s, int reset_all){
|
|
const int basic_t1= 3;
|
|
const int basic_t2= 7;
|
|
const int basic_t3= 21;
|
|
int factor;
|
|
|
|
if(s->maxval==0 || reset_all) s->maxval= (1 << s->bpp) - 1;
|
|
|
|
if(s->maxval >=128){
|
|
factor= (FFMIN(s->maxval, 4095) + 128)>>8;
|
|
|
|
if(s->T1==0 || reset_all)
|
|
s->T1= iso_clip(factor*(basic_t1-2) + 2 + 3*s->near, s->near+1, s->maxval);
|
|
if(s->T2==0 || reset_all)
|
|
s->T2= iso_clip(factor*(basic_t2-3) + 3 + 5*s->near, s->T1, s->maxval);
|
|
if(s->T3==0 || reset_all)
|
|
s->T3= iso_clip(factor*(basic_t3-4) + 4 + 7*s->near, s->T2, s->maxval);
|
|
}else{
|
|
factor= 256 / (s->maxval + 1);
|
|
|
|
if(s->T1==0 || reset_all)
|
|
s->T1= iso_clip(FFMAX(2, basic_t1/factor + 3*s->near), s->near+1, s->maxval);
|
|
if(s->T2==0 || reset_all)
|
|
s->T2= iso_clip(FFMAX(3, basic_t2/factor + 5*s->near), s->T1, s->maxval);
|
|
if(s->T3==0 || reset_all)
|
|
s->T3= iso_clip(FFMAX(4, basic_t3/factor + 7*s->near), s->T2, s->maxval);
|
|
}
|
|
|
|
if(s->reset==0 || reset_all) s->reset= 64;
|
|
av_dlog(NULL, "[JPEG-LS RESET] T=%i,%i,%i\n", s->T1, s->T2, s->T3);
|
|
}
|