diff options
Diffstat (limited to 'contrib/ffmpeg/libavcodec/jpeglsenc.c')
| -rw-r--r-- | contrib/ffmpeg/libavcodec/jpeglsenc.c | 393 |
1 files changed, 0 insertions, 393 deletions
diff --git a/contrib/ffmpeg/libavcodec/jpeglsenc.c b/contrib/ffmpeg/libavcodec/jpeglsenc.c deleted file mode 100644 index a759a7048..000000000 --- a/contrib/ffmpeg/libavcodec/jpeglsenc.c +++ /dev/null @@ -1,393 +0,0 @@ -/* - * JPEG-LS encoder - * 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 jpeglsenc.c - * JPEG-LS encoder. - */ - -#include "avcodec.h" -#include "bitstream.h" -#include "golomb.h" -#include "dsputil.h" -#include "mjpeg.h" -#include "jpegls.h" - - -/** - * 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); - - ff_jpegls_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; - - ff_jpegls_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 << ff_log2_run[state->run_index[comp]])){ - put_bits(pb, 1, 1); - run -= 1 << ff_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(ff_log2_run[state->run_index[comp]]) - put_bits(pb, ff_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, ff_log2_run[state->run_index[comp]]); - - if(state->run_index[comp] > 0) - state->run_index[comp]--; - } else { /* regular mode */ - int context; - - 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; - 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; - ff_jpegls_reset_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; - ff_jpegls_reset_coding_parameters(state, 0); - ff_jpegls_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 should not 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}, -}; |