diff options
author | Paul B Mahol <onemda@gmail.com> | 2017-05-27 15:28:08 +0300 |
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committer | Paul B Mahol <onemda@gmail.com> | 2018-11-19 00:59:29 +0300 |
commit | a064530da8b6276057ae5796575938dc24acf157 (patch) | |
tree | 8b00befe93091c6a83604fb6ca7125780ee6d84f /libavcodec/scpr.h | |
parent | 80ce23da6533d37d2d6ec27c9132060451af892a (diff) |
avcodec/scpr: add version 3 support
Signed-off-by: Paul B Mahol <onemda@gmail.com>
Diffstat (limited to 'libavcodec/scpr.h')
-rw-r--r-- | libavcodec/scpr.h | 349 |
1 files changed, 349 insertions, 0 deletions
diff --git a/libavcodec/scpr.h b/libavcodec/scpr.h new file mode 100644 index 0000000000..a013d7e600 --- /dev/null +++ b/libavcodec/scpr.h @@ -0,0 +1,349 @@ +/* + * ScreenPressor decoder + * + * Copyright (c) 2017 Paul B Mahol + * + * 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 + */ + +#ifndef AVCODEC_SCPR_H +#define AVCODEC_SCPR_H + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "avcodec.h" +#include "bytestream.h" +#include "internal.h" +#include "scpr3.h" + +typedef struct RangeCoder { + uint32_t code; + uint32_t range; + uint32_t code1; +} RangeCoder; + +typedef struct PixelModel { + uint32_t freq[256]; + uint32_t lookup[16]; + uint32_t total_freq; +} PixelModel; + +typedef struct SCPRContext { + int version; + AVFrame *last_frame; + AVFrame *current_frame; + GetByteContext gb; + RangeCoder rc; + PixelModel pixel_model[3][4096]; + uint32_t op_model[6][7]; + uint32_t run_model[6][257]; + uint32_t range_model[257]; + uint32_t count_model[257]; + uint32_t fill_model[6]; + uint32_t sxy_model[4][17]; + uint32_t mv_model[2][513]; + uint32_t nbx, nby; + uint32_t nbcount; + uint32_t *blocks; + uint32_t cbits; + int cxshift; + + PixelModel3 pixel_model3[3][4096]; + RunModel3 run_model3[6]; + RunModel3 range_model3; + RunModel3 count_model3; + FillModel3 fill_model3; + SxyModel3 sxy_model3[4]; + MVModel3 mv_model3[2]; + OpModel3 op_model3[6]; + + int (*get_freq)(RangeCoder *rc, uint32_t total_freq, uint32_t *freq); + int (*decode)(GetByteContext *gb, RangeCoder *rc, uint32_t cumFreq, uint32_t freq, uint32_t total_freq); +} SCPRContext; + +static int decode_run_i(AVCodecContext *avctx, uint32_t ptype, int run, + int *x, int *y, uint32_t clr, uint32_t *dst, + int linesize, uint32_t *lx, uint32_t *ly, + uint32_t backstep, int off, int *cx, int *cx1) +{ + uint32_t r, g, b; + int z; + + switch (ptype) { + case 0: + while (run-- > 0) { + if (*y >= avctx->height) + return AVERROR_INVALIDDATA; + + dst[*y * linesize + *x] = clr; + *lx = *x; + *ly = *y; + (*x)++; + if (*x >= avctx->width) { + *x = 0; + (*y)++; + } + } + break; + case 1: + while (run-- > 0) { + if (*y >= avctx->height) + return AVERROR_INVALIDDATA; + + dst[*y * linesize + *x] = dst[*ly * linesize + *lx]; + *lx = *x; + *ly = *y; + (*x)++; + if (*x >= avctx->width) { + *x = 0; + (*y)++; + } + } + clr = dst[*ly * linesize + *lx]; + break; + case 2: + while (run-- > 0) { + if (*y < 1 || *y >= avctx->height) + return AVERROR_INVALIDDATA; + + clr = dst[*y * linesize + *x + off + 1]; + dst[*y * linesize + *x] = clr; + *lx = *x; + *ly = *y; + (*x)++; + if (*x >= avctx->width) { + *x = 0; + (*y)++; + } + } + break; + case 4: + while (run-- > 0) { + uint8_t *odst = (uint8_t *)dst; + + if (*y < 1 || *y >= avctx->height || + (*y == 1 && *x == 0)) + return AVERROR_INVALIDDATA; + + if (*x == 0) { + z = backstep; + } else { + z = 0; + } + + r = odst[(*ly * linesize + *lx) * 4] + + odst[((*y * linesize + *x) + off) * 4 + 4] - + odst[((*y * linesize + *x) + off - z) * 4]; + g = odst[(*ly * linesize + *lx) * 4 + 1] + + odst[((*y * linesize + *x) + off) * 4 + 5] - + odst[((*y * linesize + *x) + off - z) * 4 + 1]; + b = odst[(*ly * linesize + *lx) * 4 + 2] + + odst[((*y * linesize + *x) + off) * 4 + 6] - + odst[((*y * linesize + *x) + off - z) * 4 + 2]; + clr = ((b & 0xFF) << 16) + ((g & 0xFF) << 8) + (r & 0xFF); + dst[*y * linesize + *x] = clr; + *lx = *x; + *ly = *y; + (*x)++; + if (*x >= avctx->width) { + *x = 0; + (*y)++; + } + } + break; + case 5: + while (run-- > 0) { + if (*y < 1 || *y >= avctx->height || + (*y == 1 && *x == 0)) + return AVERROR_INVALIDDATA; + + if (*x == 0) { + z = backstep; + } else { + z = 0; + } + + clr = dst[*y * linesize + *x + off - z]; + dst[*y * linesize + *x] = clr; + *lx = *x; + *ly = *y; + (*x)++; + if (*x >= avctx->width) { + *x = 0; + (*y)++; + } + } + break; + } + + if (avctx->bits_per_coded_sample == 16) { + *cx1 = (clr & 0x3F00) >> 2; + *cx = (clr & 0x3FFFFF) >> 16; + } else { + *cx1 = (clr & 0xFC00) >> 4; + *cx = (clr & 0xFFFFFF) >> 18; + } + + return 0; +} + +static int decode_run_p(AVCodecContext *avctx, uint32_t ptype, int run, + int x, int y, uint32_t clr, + uint32_t *dst, uint32_t *prev, + int linesize, int plinesize, + uint32_t *bx, uint32_t *by, + uint32_t backstep, int sx1, int sx2, + int *cx, int *cx1) +{ + uint32_t r, g, b; + int z; + + switch (ptype) { + case 0: + while (run-- > 0) { + if (*by >= avctx->height) + return AVERROR_INVALIDDATA; + + dst[*by * linesize + *bx] = clr; + (*bx)++; + if (*bx >= x * 16 + sx2 || *bx >= avctx->width) { + *bx = x * 16 + sx1; + (*by)++; + } + } + break; + case 1: + while (run-- > 0) { + if (*bx == 0) { + if (*by < 1) + return AVERROR_INVALIDDATA; + z = backstep; + } else { + z = 0; + } + + if (*by >= avctx->height) + return AVERROR_INVALIDDATA; + + clr = dst[*by * linesize + *bx - 1 - z]; + dst[*by * linesize + *bx] = clr; + (*bx)++; + if (*bx >= x * 16 + sx2 || *bx >= avctx->width) { + *bx = x * 16 + sx1; + (*by)++; + } + } + break; + case 2: + while (run-- > 0) { + if (*by < 1 || *by >= avctx->height) + return AVERROR_INVALIDDATA; + + clr = dst[(*by - 1) * linesize + *bx]; + dst[*by * linesize + *bx] = clr; + (*bx)++; + if (*bx >= x * 16 + sx2 || *bx >= avctx->width) { + *bx = x * 16 + sx1; + (*by)++; + } + } + break; + case 3: + while (run-- > 0) { + if (*by >= avctx->height) + return AVERROR_INVALIDDATA; + + clr = prev[*by * plinesize + *bx]; + dst[*by * linesize + *bx] = clr; + (*bx)++; + if (*bx >= x * 16 + sx2 || *bx >= avctx->width) { + *bx = x * 16 + sx1; + (*by)++; + } + } + break; + case 4: + while (run-- > 0) { + uint8_t *odst = (uint8_t *)dst; + + if (*by < 1 || *by >= avctx->height) + return AVERROR_INVALIDDATA; + + if (*bx == 0) { + if (*by < 2) + return AVERROR_INVALIDDATA; + z = backstep; + } else { + z = 0; + } + + r = odst[((*by - 1) * linesize + *bx) * 4] + + odst[(*by * linesize + *bx - 1 - z) * 4] - + odst[((*by - 1) * linesize + *bx - 1 - z) * 4]; + g = odst[((*by - 1) * linesize + *bx) * 4 + 1] + + odst[(*by * linesize + *bx - 1 - z) * 4 + 1] - + odst[((*by - 1) * linesize + *bx - 1 - z) * 4 + 1]; + b = odst[((*by - 1) * linesize + *bx) * 4 + 2] + + odst[(*by * linesize + *bx - 1 - z) * 4 + 2] - + odst[((*by - 1) * linesize + *bx - 1 - z) * 4 + 2]; + clr = ((b & 0xFF) << 16) + ((g & 0xFF) << 8) + (r & 0xFF); + dst[*by * linesize + *bx] = clr; + (*bx)++; + if (*bx >= x * 16 + sx2 || *bx >= avctx->width) { + *bx = x * 16 + sx1; + (*by)++; + } + } + break; + case 5: + while (run-- > 0) { + if (*by < 1 || *by >= avctx->height) + return AVERROR_INVALIDDATA; + + if (*bx == 0) { + if (*by < 2) + return AVERROR_INVALIDDATA; + z = backstep; + } else { + z = 0; + } + + clr = dst[(*by - 1) * linesize + *bx - 1 - z]; + dst[*by * linesize + *bx] = clr; + (*bx)++; + if (*bx >= x * 16 + sx2 || *bx >= avctx->width) { + *bx = x * 16 + sx1; + (*by)++; + } + } + break; + } + + if (avctx->bits_per_coded_sample == 16) { + *cx1 = (clr & 0x3F00) >> 2; + *cx = (clr & 0x3FFFFF) >> 16; + } else { + *cx1 = (clr & 0xFC00) >> 4; + *cx = (clr & 0xFFFFFF) >> 18; + } + + return 0; +} + +#endif /* AVCODEC_SCPR_H */ |