diff options
Diffstat (limited to 'contrib/ffmpeg/libavcodec/jpegls.c')
-rw-r--r-- | contrib/ffmpeg/libavcodec/jpegls.c | 96 |
1 files changed, 0 insertions, 96 deletions
diff --git a/contrib/ffmpeg/libavcodec/jpegls.c b/contrib/ffmpeg/libavcodec/jpegls.c deleted file mode 100644 index 8a6f5065c..000000000 --- a/contrib/ffmpeg/libavcodec/jpegls.c +++ /dev/null @@ -1,96 +0,0 @@ -/* - * 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 jpegls.c - * JPEG-LS common code. - */ - -#include "jpegls.h" - -const uint8_t ff_log2_run[32]={ - 0, 0, 0, 0, 1, 1, 1, 1, - 2, 2, 2, 2, 3, 3, 3, 3, - 4, 4, 5, 5, 6, 6, 7, 7, - 8, 9,10,11,12,13,14,15 -}; - -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++); - - if(state->bpp < 8) - state->limit = 16 + 2 * state->bpp - state->qbpp; - else - state->limit = (4 * state->bpp) - 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 + 6*s->near), s->T2, s->maxval); - } - - if(s->reset==0 || reset_all) s->reset= 64; -// av_log(NULL, AV_LOG_DEBUG, "[JPEG-LS RESET] T=%i,%i,%i\n", s->T1, s->T2, s->T3); -} |