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Diffstat (limited to 'contrib/ffmpeg/libavcodec/jpeglsdec.c')
-rw-r--r--contrib/ffmpeg/libavcodec/jpeglsdec.c375
1 files changed, 0 insertions, 375 deletions
diff --git a/contrib/ffmpeg/libavcodec/jpeglsdec.c b/contrib/ffmpeg/libavcodec/jpeglsdec.c
deleted file mode 100644
index ac40903da..000000000
--- a/contrib/ffmpeg/libavcodec/jpeglsdec.c
+++ /dev/null
@@ -1,375 +0,0 @@
-/*
- * JPEG-LS decoder
- * 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 jpeglsdec.c
- * JPEG-LS decoder.
- */
-
-#include "avcodec.h"
-#include "bitstream.h"
-#include "golomb.h"
-#include "mjpeg.h"
-#include "mjpegdec.h"
-#include "jpegls.h"
-#include "jpeglsdec.h"
-
-
-/*
-* Uncomment this to significantly speed up decoding of broken JPEG-LS
-* (or test broken JPEG-LS decoder) and slow down ordinary decoding a bit.
-*
-* There is no Golomb code with length >= 32 bits possible, so check and
-* avoid situation of 32 zeros, FFmpeg Golomb decoder is painfully slow
-* on this errors.
-*/
-//#define JLS_BROKEN
-
-
-/**
- * Decode LSE block with initialization parameters
- */
-int ff_jpegls_decode_lse(MJpegDecodeContext *s)
-{
- int len, id;
-
- /* XXX: verify len field validity */
- len = get_bits(&s->gb, 16);
- id = get_bits(&s->gb, 8);
-
- switch(id){
- case 1:
- s->maxval= get_bits(&s->gb, 16);
- s->t1= get_bits(&s->gb, 16);
- s->t2= get_bits(&s->gb, 16);
- s->t3= get_bits(&s->gb, 16);
- s->reset= get_bits(&s->gb, 16);
-
-// ff_jpegls_reset_coding_parameters(s, 0);
- //FIXME quant table?
- break;
- case 2:
- case 3:
- av_log(s->avctx, AV_LOG_ERROR, "palette not supported\n");
- return -1;
- case 4:
- av_log(s->avctx, AV_LOG_ERROR, "oversize image not supported\n");
- return -1;
- default:
- av_log(s->avctx, AV_LOG_ERROR, "invalid id %d\n", id);
- return -1;
- }
-// av_log(s->avctx, AV_LOG_DEBUG, "ID=%i, T=%i,%i,%i\n", id, s->t1, s->t2, s->t3);
-
- return 0;
-}
-
-/**
- * Get context-dependent Golomb code, decode it and update context
- */
-static inline int ls_get_code_regular(GetBitContext *gb, JLSState *state, int Q){
- int k, ret;
-
- for(k = 0; (state->N[Q] << k) < state->A[Q]; k++);
-
-#ifdef JLS_BROKEN
- if(!show_bits_long(gb, 32))return -1;
-#endif
- ret = get_ur_golomb_jpegls(gb, k, state->limit, state->qbpp);
-
- /* decode mapped error */
- if(ret & 1)
- ret = -((ret + 1) >> 1);
- else
- ret >>= 1;
-
- /* for NEAR=0, k=0 and 2*B[Q] <= - N[Q] mapping is reversed */
- if(!state->near && !k && (2 * state->B[Q] <= -state->N[Q]))
- ret = -(ret + 1);
-
- ret= ff_jpegls_update_state_regular(state, Q, ret);
-
- return ret;
-}
-
-/**
- * Get Golomb code, decode it and update state for run termination
- */
-static inline int ls_get_code_runterm(GetBitContext *gb, JLSState *state, int RItype, int limit_add){
- int k, ret, temp, map;
- int Q = 365 + RItype;
-
- temp= state->A[Q];
- if(RItype)
- temp += state->N[Q] >> 1;
-
- for(k = 0; (state->N[Q] << k) < temp; k++);
-
-#ifdef JLS_BROKEN
- if(!show_bits_long(gb, 32))return -1;
-#endif
- ret = get_ur_golomb_jpegls(gb, k, state->limit - limit_add - 1, state->qbpp);
-
- /* decode mapped error */
- map = 0;
- if(!k && (RItype || ret) && (2 * state->B[Q] < state->N[Q]))
- map = 1;
- ret += RItype + map;
-
- if(ret & 1){
- ret = map - ((ret + 1) >> 1);
- state->B[Q]++;
- } else {
- ret = ret >> 1;
- }
-
- /* update state */
- state->A[Q] += FFABS(ret) - RItype;
- ret *= state->twonear;
- ff_jpegls_downscale_state(state, Q);
-
- return ret;
-}
-
-/**
- * Decode one line of image
- */
-static inline void ls_decode_line(JLSState *state, MJpegDecodeContext *s, void *last, void *dst, int last2, int w, int stride, int comp, int bits){
- int i, x = 0;
- int Ra, Rb, Rc, Rd;
- int D0, D1, D2;
-
- while(x < w) {
- int err, pred;
-
- /* compute gradients */
- Ra = x ? R(dst, x - stride) : R(last, x);
- Rb = R(last, x);
- Rc = x ? R(last, x - stride) : last2;
- Rd = (x >= w - stride) ? R(last, x) : R(last, x + stride);
- D0 = Rd - Rb;
- D1 = Rb - Rc;
- D2 = Rc - Ra;
- /* run mode */
- if((FFABS(D0) <= state->near) && (FFABS(D1) <= state->near) && (FFABS(D2) <= state->near)) {
- int r;
- int RItype;
-
- /* decode full runs while available */
- while(get_bits1(&s->gb)) {
- int r;
- r = 1 << ff_log2_run[state->run_index[comp]];
- if(x + r * stride > w) {
- r = (w - x) / stride;
- }
- for(i = 0; i < r; i++) {
- W(dst, x, Ra);
- x += stride;
- }
- /* if EOL reached, we stop decoding */
- if(r != (1 << ff_log2_run[state->run_index[comp]]))
- return;
- if(state->run_index[comp] < 31)
- state->run_index[comp]++;
- if(x + stride > w)
- return;
- }
- /* decode aborted run */
- r = ff_log2_run[state->run_index[comp]];
- if(r)
- r = get_bits_long(&s->gb, r);
- for(i = 0; i < r; i++) {
- W(dst, x, Ra);
- x += stride;
- }
-
- /* decode run termination value */
- Rb = R(last, x);
- RItype = (FFABS(Ra - Rb) <= state->near) ? 1 : 0;
- err = ls_get_code_runterm(&s->gb, state, RItype, ff_log2_run[state->run_index[comp]]);
- if(state->run_index[comp])
- state->run_index[comp]--;
-
- if(state->near && RItype){
- pred = Ra + err;
- } else {
- if(Rb < Ra)
- pred = Rb - err;
- else
- pred = Rb + err;
- }
- } else { /* regular mode */
- int context, sign;
-
- context = ff_jpegls_quantize(state, D0) * 81 + ff_jpegls_quantize(state, D1) * 9 + ff_jpegls_quantize(state, D2);
- pred = mid_pred(Ra, Ra + Rb - Rc, Rb);
-
- if(context < 0){
- context = -context;
- sign = 1;
- }else{
- sign = 0;
- }
-
- if(sign){
- pred = av_clip(pred - state->C[context], 0, state->maxval);
- err = -ls_get_code_regular(&s->gb, state, context);
- } else {
- pred = av_clip(pred + state->C[context], 0, state->maxval);
- err = ls_get_code_regular(&s->gb, state, context);
- }
-
- /* we have to do something more for near-lossless coding */
- pred += err;
- }
- if(state->near){
- if(pred < -state->near)
- pred += state->range * state->twonear;
- else if(pred > state->maxval + state->near)
- pred -= state->range * state->twonear;
- pred = av_clip(pred, 0, state->maxval);
- }
-
- pred &= state->maxval;
- W(dst, x, pred);
- x += stride;
- }
-}
-
-int ff_jpegls_decode_picture(MJpegDecodeContext *s, int near, int point_transform, int ilv){
- int i, t = 0;
- uint8_t *zero, *last, *cur;
- JLSState *state;
- int off = 0, stride = 1, width, shift;
-
- zero = av_mallocz(s->picture.linesize[0]);
- last = zero;
- cur = s->picture.data[0];
-
- state = av_mallocz(sizeof(JLSState));
- /* initialize JPEG-LS state from JPEG parameters */
- state->near = near;
- state->bpp = (s->bits < 2) ? 2 : s->bits;
- state->maxval = s->maxval;
- state->T1 = s->t1;
- state->T2 = s->t2;
- state->T3 = s->t3;
- state->reset = s->reset;
- ff_jpegls_reset_coding_parameters(state, 0);
- ff_jpegls_init_state(state);
-
- if(s->bits <= 8)
- shift = point_transform + (8 - s->bits);
- else
- shift = point_transform + (16 - s->bits);
-
-// av_log(s->avctx, AV_LOG_DEBUG, "JPEG-LS params: %ix%i NEAR=%i MV=%i T(%i,%i,%i) RESET=%i, LIMIT=%i, qbpp=%i, RANGE=%i\n",s->width,s->height,state->near,state->maxval,state->T1,state->T2,state->T3,state->reset,state->limit,state->qbpp, state->range);
-// av_log(s->avctx, AV_LOG_DEBUG, "JPEG params: ILV=%i Pt=%i BPP=%i, scan = %i\n", ilv, point_transform, s->bits, s->cur_scan);
- if(ilv == 0) { /* separate planes */
- off = s->cur_scan - 1;
- stride = (s->nb_components > 1) ? 3 : 1;
- width = s->width * stride;
- cur += off;
- for(i = 0; i < s->height; i++) {
- if(s->bits <= 8){
- ls_decode_line(state, s, last, cur, t, width, stride, off, 8);
- t = last[0];
- }else{
- ls_decode_line(state, s, last, cur, t, width, stride, off, 16);
- t = *((uint16_t*)last);
- }
- last = cur;
- cur += s->picture.linesize[0];
-
- if (s->restart_interval && !--s->restart_count) {
- align_get_bits(&s->gb);
- skip_bits(&s->gb, 16); /* skip RSTn */
- }
- }
- } else if(ilv == 1) { /* line interleaving */
- int j;
- int Rc[3] = {0, 0, 0};
- memset(cur, 0, s->picture.linesize[0]);
- width = s->width * 3;
- for(i = 0; i < s->height; i++) {
- for(j = 0; j < 3; j++) {
- ls_decode_line(state, s, last + j, cur + j, Rc[j], width, 3, j, 8);
- Rc[j] = last[j];
-
- if (s->restart_interval && !--s->restart_count) {
- align_get_bits(&s->gb);
- skip_bits(&s->gb, 16); /* skip RSTn */
- }
- }
- last = cur;
- cur += s->picture.linesize[0];
- }
- } else if(ilv == 2) { /* sample interleaving */
- av_log(s->avctx, AV_LOG_ERROR, "Sample interleaved images are not supported.\n");
- av_free(state);
- av_free(zero);
- return -1;
- }
-
- if(shift){ /* we need to do point transform or normalize samples */
- int x, w;
-
- w = s->width * s->nb_components;
-
- if(s->bits <= 8){
- uint8_t *src = s->picture.data[0];
-
- for(i = 0; i < s->height; i++){
- for(x = off; x < w; x+= stride){
- src[x] <<= shift;
- }
- src += s->picture.linesize[0];
- }
- }else{
- uint16_t *src = (uint16_t*) s->picture.data[0];
-
- for(i = 0; i < s->height; i++){
- for(x = 0; x < w; x++){
- src[x] <<= shift;
- }
- src += s->picture.linesize[0]/2;
- }
- }
- }
- av_free(state);
- av_free(zero);
-
- return 0;
-}
-
-
-AVCodec jpegls_decoder = {
- "jpegls",
- CODEC_TYPE_VIDEO,
- CODEC_ID_JPEGLS,
- sizeof(MJpegDecodeContext),
- ff_mjpeg_decode_init,
- NULL,
- ff_mjpeg_decode_end,
- ff_mjpeg_decode_frame,
- CODEC_CAP_DR1,
-};
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