diff options
Diffstat (limited to 'libavcodec/jpeg_ls.c')
| -rw-r--r-- | libavcodec/jpeg_ls.c | 860 |
1 files changed, 0 insertions, 860 deletions
diff --git a/libavcodec/jpeg_ls.c b/libavcodec/jpeg_ls.c deleted file mode 100644 index 855fc73da0..0000000000 --- a/libavcodec/jpeg_ls.c +++ /dev/null @@ -1,860 +0,0 @@ -/* - * JPEG-LS encoder and 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 - */ - -#include "golomb.h" - -/** - * @file jpeg_ls.c - * JPEG-LS encoder and decoder. - */ - -typedef struct JpeglsContext{ - AVCodecContext *avctx; - AVFrame picture; -}JpeglsContext; - -typedef struct JLSState{ - int T1, T2, T3; - int A[367], B[367], C[365], N[367]; - int limit, reset, bpp, qbpp, maxval, range; - int near, twonear; - int run_index[3]; -}JLSState; - -static const uint8_t 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 -}; - -/* -* 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 - -/********** Functions for both encoder and decoder **********/ - -/** - * Calculate initial JPEG-LS parameters - */ -static void ls_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; - } - -} - -/** - * Calculate quantized gradient value, used for context determination - */ -static inline int quantize(JLSState *s, int v){ //FIXME optimize - if(v==0) return 0; - if(v < 0){ - if(v <= -s->T3) return -4; - if(v <= -s->T2) return -3; - if(v <= -s->T1) return -2; - if(v < -s->near) return -1; - return 0; - }else{ - if(v <= s->near) return 0; - if(v < s->T1) return 1; - if(v < s->T2) return 2; - if(v < s->T3) return 3; - return 4; - } -} - -/** - * 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; -} - -/** - * Calculate JPEG-LS codec values - */ -static void reset_ls_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); -} - - -/********** Decoder-specific functions **********/ - -/** - * Decode LSE block with initialization parameters - */ -static int 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); - -// reset_ls_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; -} - -static inline void downscale_state(JLSState *state, int Q){ - if(state->N[Q] == state->reset){ - state->A[Q] >>=1; - state->B[Q] >>=1; - state->N[Q] >>=1; - } - state->N[Q]++; -} - -static inline int update_state_regular(JLSState *state, int Q, int err){ - state->A[Q] += FFABS(err); - err *= state->twonear; - state->B[Q] += err; - - downscale_state(state, Q); - - if(state->B[Q] <= -state->N[Q]) { - state->B[Q]= FFMAX(state->B[Q] + state->N[Q], 1-state->N[Q]); - if(state->C[Q] > -128) - state->C[Q]--; - }else if(state->B[Q] > 0){ - state->B[Q]= FFMIN(state->B[Q] - state->N[Q], 0); - if(state->C[Q] < 127) - state->C[Q]++; - } - - return err; -} - -/** - * 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= 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; - downscale_state(state, Q); - - return ret; -} - -#define R(a, i ) (bits == 8 ? ((uint8_t*)(a))[i] : ((uint16_t*)(a))[i] ) -#define W(a, i, v) (bits == 8 ? (((uint8_t*)(a))[i]=v) : (((uint16_t*)(a))[i]=v)) -/** - * 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 << 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 << 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 = 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, 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 = quantize(state, D0) * 81 + quantize(state, D1) * 9 + 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; - } -} - -static int ls_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; - reset_ls_coding_parameters(state, 0); - ls_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; -} - -#if defined(CONFIG_ENCODERS) && defined(CONFIG_JPEGLS_ENCODER) -/********** Encoder-specific functions **********/ - -/** - * Encode error from regular symbol - */ -static inline void ls_encode_regular(JLSState *state, PutBitContext *pb, int Q, int err){ - int k; - int val; - int map; - - for(k = 0; (state->N[Q] << k) < state->A[Q]; k++); - - map = !state->near && !k && (2 * state->B[Q] <= -state->N[Q]); - - if(err < 0) - err += state->range; - if(err >= ((state->range + 1) >> 1)) { - err -= state->range; - val = 2 * FFABS(err) - 1 - map; - } else - val = 2 * err + map; - - set_ur_golomb_jpegls(pb, val, k, state->limit, state->qbpp); - - update_state_regular(state, Q, err); -} - -/** - * Encode error from run termination - */ -static inline void ls_encode_runterm(JLSState *state, PutBitContext *pb, int RItype, int err, int limit_add){ - int k; - int val, map; - int Q = 365 + RItype; - int temp; - - temp = state->A[Q]; - if(RItype) - temp += state->N[Q] >> 1; - for(k = 0; (state->N[Q] << k) < temp; k++); - map = 0; - if(!k && err && (2 * state->B[Q] < state->N[Q])) - map = 1; - - if(err < 0) - val = - (2 * err) - 1 - RItype + map; - else - val = 2 * err - RItype - map; - set_ur_golomb_jpegls(pb, val, k, state->limit - limit_add - 1, state->qbpp); - - if(err < 0) - state->B[Q]++; - state->A[Q] += (val + 1 - RItype) >> 1; - - downscale_state(state, Q); -} - -/** - * Encode run value as specified by JPEG-LS standard - */ -static inline void ls_encode_run(JLSState *state, PutBitContext *pb, int run, int comp, int trail){ - while(run >= (1 << log2_run[state->run_index[comp]])){ - put_bits(pb, 1, 1); - run -= 1 << log2_run[state->run_index[comp]]; - if(state->run_index[comp] < 31) - state->run_index[comp]++; - } - /* if hit EOL, encode another full run, else encode aborted run */ - if(!trail && run) { - put_bits(pb, 1, 1); - }else if(trail){ - put_bits(pb, 1, 0); - if(log2_run[state->run_index[comp]]) - put_bits(pb, log2_run[state->run_index[comp]], run); - } -} - -/** - * Encode one line of image - */ -static inline void ls_encode_line(JLSState *state, PutBitContext *pb, void *last, void *cur, int last2, int w, int stride, int comp, int bits){ - int x = 0; - int Ra, Rb, Rc, Rd; - int D0, D1, D2; - - while(x < w) { - int err, pred, sign; - - /* compute gradients */ - Ra = x ? R(cur, 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 RUNval, RItype, run; - - run = 0; - RUNval = Ra; - while(x < w && (FFABS(R(cur, x) - RUNval) <= state->near)){ - run++; - W(cur, x, Ra); - x += stride; - } - ls_encode_run(state, pb, run, comp, x < w); - if(x >= w) - return; - Rb = R(last, x); - RItype = (FFABS(Ra - Rb) <= state->near); - pred = RItype ? Ra : Rb; - err = R(cur, x) - pred; - - if(!RItype && Ra > Rb) - err = -err; - - if(state->near){ - if(err > 0) - err = (state->near + err) / state->twonear; - else - err = -(state->near - err) / state->twonear; - - if(RItype || (Rb >= Ra)) - Ra = av_clip(pred + err * state->twonear, 0, state->maxval); - else - Ra = av_clip(pred - err * state->twonear, 0, state->maxval); - W(cur, x, Ra); - } - if(err < 0) - err += state->range; - if(err >= ((state->range + 1) >> 1)) - err -= state->range; - - ls_encode_runterm(state, pb, RItype, err, log2_run[state->run_index[comp]]); - - if(state->run_index[comp] > 0) - state->run_index[comp]--; - } else { /* regular mode */ - int context; - - context = quantize(state, D0) * 81 + quantize(state, D1) * 9 + quantize(state, D2); - pred = mid_pred(Ra, Ra + Rb - Rc, Rb); - - if(context < 0){ - context = -context; - sign = 1; - pred = av_clip(pred - state->C[context], 0, state->maxval); - err = pred - R(cur, x); - }else{ - sign = 0; - pred = av_clip(pred + state->C[context], 0, state->maxval); - err = R(cur, x) - pred; - } - - if(state->near){ - if(err > 0) - err = (state->near + err) / state->twonear; - else - err = -(state->near - err) / state->twonear; - if(!sign) - Ra = av_clip(pred + err * state->twonear, 0, state->maxval); - else - Ra = av_clip(pred - err * state->twonear, 0, state->maxval); - W(cur, x, Ra); - } - - ls_encode_regular(state, pb, context, err); - } - x += stride; - } -} - -static void ls_store_lse(JLSState *state, PutBitContext *pb){ - /* Test if we have default params and don't need to store LSE */ - JLSState state2; - memset(&state2, 0, sizeof(JLSState)); - state2.bpp = state->bpp; - state2.near = state->near; - reset_ls_coding_parameters(&state2, 1); - if(state->T1 == state2.T1 && state->T2 == state2.T2 && state->T3 == state2.T3 && state->reset == state2.reset) - return; - /* store LSE type 1 */ - put_marker(pb, LSE); - put_bits(pb, 16, 13); - put_bits(pb, 8, 1); - put_bits(pb, 16, state->maxval); - put_bits(pb, 16, state->T1); - put_bits(pb, 16, state->T2); - put_bits(pb, 16, state->T3); - put_bits(pb, 16, state->reset); -} - -static int encode_picture_ls(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data){ - JpeglsContext * const s = avctx->priv_data; - AVFrame *pict = data; - AVFrame * const p= (AVFrame*)&s->picture; - const int near = avctx->prediction_method; - PutBitContext pb, pb2; - GetBitContext gb; - uint8_t *buf2, *zero, *cur, *last; - JLSState *state; - int i, size; - int comps; - - buf2 = av_malloc(buf_size); - - init_put_bits(&pb, buf, buf_size); - init_put_bits(&pb2, buf2, buf_size); - - *p = *pict; - p->pict_type= FF_I_TYPE; - p->key_frame= 1; - - if(avctx->pix_fmt == PIX_FMT_GRAY8 || avctx->pix_fmt == PIX_FMT_GRAY16) - comps = 1; - else - comps = 3; - - /* write our own JPEG header, can't use mjpeg_picture_header */ - put_marker(&pb, SOI); - put_marker(&pb, SOF48); - put_bits(&pb, 16, 8 + comps * 3); // header size depends on components - put_bits(&pb, 8, (avctx->pix_fmt == PIX_FMT_GRAY16) ? 16 : 8); // bpp - put_bits(&pb, 16, avctx->height); - put_bits(&pb, 16, avctx->width); - put_bits(&pb, 8, comps); // components - for(i = 1; i <= comps; i++) { - put_bits(&pb, 8, i); // component ID - put_bits(&pb, 8, 0x11); // subsampling: none - put_bits(&pb, 8, 0); // Tiq, used by JPEG-LS ext - } - - put_marker(&pb, SOS); - put_bits(&pb, 16, 6 + comps * 2); - put_bits(&pb, 8, comps); - for(i = 1; i <= comps; i++) { - put_bits(&pb, 8, i); // component ID - put_bits(&pb, 8, 0); // mapping index: none - } - put_bits(&pb, 8, near); - put_bits(&pb, 8, (comps > 1) ? 1 : 0); // interleaving: 0 - plane, 1 - line - put_bits(&pb, 8, 0); // point transform: none - - state = av_mallocz(sizeof(JLSState)); - /* initialize JPEG-LS state from JPEG parameters */ - state->near = near; - state->bpp = (avctx->pix_fmt == PIX_FMT_GRAY16) ? 16 : 8; - reset_ls_coding_parameters(state, 0); - ls_init_state(state); - - ls_store_lse(state, &pb); - - zero = av_mallocz(p->linesize[0]); - last = zero; - cur = p->data[0]; - if(avctx->pix_fmt == PIX_FMT_GRAY8){ - int t = 0; - - for(i = 0; i < avctx->height; i++) { - ls_encode_line(state, &pb2, last, cur, t, avctx->width, 1, 0, 8); - t = last[0]; - last = cur; - cur += p->linesize[0]; - } - }else if(avctx->pix_fmt == PIX_FMT_GRAY16){ - int t = 0; - - for(i = 0; i < avctx->height; i++) { - ls_encode_line(state, &pb2, last, cur, t, avctx->width, 1, 0, 16); - t = *((uint16_t*)last); - last = cur; - cur += p->linesize[0]; - } - }else if(avctx->pix_fmt == PIX_FMT_RGB24){ - int j, width; - int Rc[3] = {0, 0, 0}; - - width = avctx->width * 3; - for(i = 0; i < avctx->height; i++) { - for(j = 0; j < 3; j++) { - ls_encode_line(state, &pb2, last + j, cur + j, Rc[j], width, 3, j, 8); - Rc[j] = last[j]; - } - last = cur; - cur += s->picture.linesize[0]; - } - }else if(avctx->pix_fmt == PIX_FMT_BGR24){ - int j, width; - int Rc[3] = {0, 0, 0}; - - width = avctx->width * 3; - for(i = 0; i < avctx->height; i++) { - for(j = 2; j >= 0; j--) { - ls_encode_line(state, &pb2, last + j, cur + j, Rc[j], width, 3, j, 8); - Rc[j] = last[j]; - } - last = cur; - cur += s->picture.linesize[0]; - } - } - - av_free(zero); - av_free(state); - - // the specification says that after doing 0xff escaping unused bits in the - // last byte must be set to 0, so just append 7 "optional" zero-bits to - // avoid special-casing. - put_bits(&pb2, 7, 0); - size = put_bits_count(&pb2); - flush_put_bits(&pb2); - /* do escape coding */ - init_get_bits(&gb, buf2, size); - size -= 7; - while(get_bits_count(&gb) < size){ - int v; - v = get_bits(&gb, 8); - put_bits(&pb, 8, v); - if(v == 0xFF){ - v = get_bits(&gb, 7); - put_bits(&pb, 8, v); - } - } - align_put_bits(&pb); - av_free(buf2); - - /* End of image */ - put_marker(&pb, EOI); - flush_put_bits(&pb); - - emms_c(); - - return put_bits_count(&pb) >> 3; -} - -static int encode_init_ls(AVCodecContext *ctx) { - JpeglsContext *c = (JpeglsContext*)ctx->priv_data; - - c->avctx = ctx; - ctx->coded_frame = &c->picture; - - if(ctx->pix_fmt != PIX_FMT_GRAY8 && ctx->pix_fmt != PIX_FMT_GRAY16 && ctx->pix_fmt != PIX_FMT_RGB24 && ctx->pix_fmt != PIX_FMT_BGR24){ - av_log(ctx, AV_LOG_ERROR, "Only grayscale and RGB24/BGR24 images are supported\n"); - return -1; - } - return 0; -} - -AVCodec jpegls_encoder = { //FIXME avoid MPV_* lossless jpeg shouldnt need them - "jpegls", - CODEC_TYPE_VIDEO, - CODEC_ID_JPEGLS, - sizeof(JpeglsContext), - encode_init_ls, - encode_picture_ls, - NULL, - .pix_fmts= (enum PixelFormat[]){PIX_FMT_BGR24, PIX_FMT_RGB24, PIX_FMT_GRAY8, PIX_FMT_GRAY16, -1}, -}; -#endif |