diff options
| author | povaddict <povaddict@users.sourceforge.net> | 2010-02-10 02:16:44 +0300 |
|---|---|---|
| committer | povaddict <povaddict@users.sourceforge.net> | 2010-02-10 02:16:44 +0300 |
| commit | 726a91b12a7524e45e7a901c9e4883af5b1bffe6 (patch) | |
| tree | f5d25e3b2e84c92f4901280c73d5d3d7e6c3cd19 /src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/jpegls.c | |
| parent | 02183f6e47ad4ea1057de9950482f291f2ae4290 (diff) | |
Rename several directories to use MixedCase instead of lowercase.
They now mostly match the case used in #includes,
and they're consistent with the names of the .h files they contain.
git-svn-id: https://mpc-hc.svn.sourceforge.net/svnroot/mpc-hc/trunk@1648 10f7b99b-c216-0410-bff0-8a66a9350fd8
Diffstat (limited to 'src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/jpegls.c')
| -rw-r--r-- | src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/jpegls.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/jpegls.c b/src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/jpegls.c new file mode 100644 index 000000000..732f45d80 --- /dev/null +++ b/src/filters/transform/MPCVideoDec/ffmpeg/libavcodec/jpegls.c @@ -0,0 +1,89 @@ +/*
+ * 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"
+
+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 + 7*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);
+}
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