diff options
Diffstat (limited to 'ffmpeg/libavcodec/mss12.h')
| -rw-r--r-- | ffmpeg/libavcodec/mss12.h | 133 |
1 files changed, 0 insertions, 133 deletions
diff --git a/ffmpeg/libavcodec/mss12.h b/ffmpeg/libavcodec/mss12.h deleted file mode 100644 index a3f9a7c..0000000 --- a/ffmpeg/libavcodec/mss12.h +++ /dev/null @@ -1,133 +0,0 @@ -/* - * Copyright (c) 2012 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 - * Common header for Microsoft Screen 1 and 2 - */ - -#ifndef AVCODEC_MSS12_H -#define AVCODEC_MSS12_H - -#include "libavutil/intreadwrite.h" -#include "avcodec.h" -#include "get_bits.h" -#include "bytestream.h" - -#define MODEL_MIN_SYMS 2 -#define MODEL_MAX_SYMS 256 -#define THRESH_ADAPTIVE -1 -#define THRESH_LOW 15 -#define THRESH_HIGH 50 - -typedef struct Model { - int16_t cum_prob[MODEL_MAX_SYMS + 1]; - int16_t weights[MODEL_MAX_SYMS + 1]; - uint8_t idx2sym[MODEL_MAX_SYMS + 1]; - int num_syms; - int thr_weight, threshold; -} Model; - -typedef struct ArithCoder { - int low, high, value; - union { - GetBitContext *gb; - GetByteContext *gB; - } gbc; - int (*get_model_sym)(struct ArithCoder *c, Model *m); - int (*get_number) (struct ArithCoder *c, int n); -} ArithCoder; - -typedef struct PixContext { - int cache_size, num_syms; - uint8_t cache[12]; - Model cache_model, full_model; - Model sec_models[15][4]; - int special_initial_cache; -} PixContext; - -struct MSS12Context; - -typedef struct SliceContext { - struct MSS12Context *c; - Model intra_region, inter_region; - Model pivot, edge_mode, split_mode; - PixContext intra_pix_ctx, inter_pix_ctx; -} SliceContext; - -typedef struct MSS12Context { - AVCodecContext *avctx; - uint32_t pal[256]; - uint8_t *pal_pic; - uint8_t *last_pal_pic; - int pal_stride; - uint8_t *mask; - int mask_stride; - uint8_t *rgb_pic; - uint8_t *last_rgb_pic; - int rgb_stride; - int free_colours; - int keyframe; - int mvX, mvY; - int corrupted; - int slice_split; - int full_model_syms; -} MSS12Context; - -int ff_mss12_decode_rect(SliceContext *ctx, ArithCoder *acoder, - int x, int y, int width, int height); -void ff_mss12_model_update(Model *m, int val); -void ff_mss12_slicecontext_reset(SliceContext *sc); -int ff_mss12_decode_init(MSS12Context *c, int version, - SliceContext *sc1, SliceContext *sc2); -int ff_mss12_decode_end(MSS12Context *ctx); - -#define ARITH_GET_BIT(VERSION) \ -static int arith ## VERSION ## _get_bit(ArithCoder *c) \ -{ \ - int range = c->high - c->low + 1; \ - int bit = 2 * c->value - c->low >= c->high; \ - \ - if (bit) \ - c->low += range >> 1; \ - else \ - c->high = c->low + (range >> 1) - 1; \ - \ - arith ## VERSION ## _normalise(c); \ - \ - return bit; \ -} - -#define ARITH_GET_MODEL_SYM(VERSION) \ -static int arith ## VERSION ## _get_model_sym(ArithCoder *c, Model *m) \ -{ \ - int idx, val; \ - \ - idx = arith ## VERSION ## _get_prob(c, m->cum_prob); \ - \ - val = m->idx2sym[idx]; \ - ff_mss12_model_update(m, idx); \ - \ - arith ## VERSION ## _normalise(c); \ - \ - return val; \ -} - -#endif /* AVCODEC_MSS12_H */ |