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/* |
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* RemotelyAnywhere Screen Capture decoder |
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* |
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* Copyright (c) 2018 Paul B Mahol |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include "libavutil/imgutils.h" |
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#include "libavutil/opt.h" |
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#include "avcodec.h" |
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#include "bytestream.h" |
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#include "codec_internal.h" |
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#include "internal.h" |
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#include "zlib_wrapper.h" |
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#include <zlib.h> |
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#define KBND MKTAG('K', 'B', 'N', 'D') |
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#define FINT MKTAG('F', 'I', 'N', 'T') |
40 |
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#define INIT MKTAG('I', 'N', 'I', 'T') |
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#define BNDL MKTAG('B', 'N', 'D', 'L') |
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#define KFRM MKTAG('K', 'F', 'R', 'M') |
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#define DLTA MKTAG('D', 'L', 'T', 'A') |
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#define MOUS MKTAG('M', 'O', 'U', 'S') |
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#define MPOS MKTAG('M', 'P', 'O', 'S') |
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#define MOVE MKTAG('M', 'O', 'V', 'E') |
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#define EMPT MKTAG('E', 'M', 'P', 'T') |
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typedef struct RASCContext { |
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AVClass *class; |
51 |
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int skip_cursor; |
52 |
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GetByteContext gb; |
53 |
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uint8_t *delta; |
54 |
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int delta_size; |
55 |
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uint8_t *cursor; |
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int cursor_size; |
57 |
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unsigned cursor_w; |
58 |
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unsigned cursor_h; |
59 |
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unsigned cursor_x; |
60 |
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unsigned cursor_y; |
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int stride; |
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int bpp; |
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AVFrame *frame; |
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AVFrame *frame1; |
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AVFrame *frame2; |
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FFZStream zstream; |
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} RASCContext; |
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static void clear_plane(AVCodecContext *avctx, AVFrame *frame) |
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{ |
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RASCContext *s = avctx->priv_data; |
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uint8_t *dst = frame->data[0]; |
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if (!dst) |
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return; |
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for (int y = 0; y < avctx->height; y++) { |
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memset(dst, 0, avctx->width * s->bpp); |
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dst += frame->linesize[0]; |
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} |
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} |
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static void copy_plane(AVCodecContext *avctx, AVFrame *src, AVFrame *dst) |
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{ |
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RASCContext *s = avctx->priv_data; |
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uint8_t *srcp = src->data[0]; |
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uint8_t *dstp = dst->data[0]; |
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for (int y = 0; y < avctx->height; y++) { |
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memcpy(dstp, srcp, s->stride); |
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srcp += src->linesize[0]; |
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dstp += dst->linesize[0]; |
93 |
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} |
94 |
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} |
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static int init_frames(AVCodecContext *avctx) |
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{ |
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RASCContext *s = avctx->priv_data; |
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int ret; |
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av_frame_unref(s->frame1); |
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av_frame_unref(s->frame2); |
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if ((ret = ff_get_buffer(avctx, s->frame1, 0)) < 0) |
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return ret; |
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if ((ret = ff_get_buffer(avctx, s->frame2, 0)) < 0) |
107 |
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return ret; |
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clear_plane(avctx, s->frame2); |
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clear_plane(avctx, s->frame1); |
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return 0; |
113 |
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} |
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static int decode_fint(AVCodecContext *avctx, |
116 |
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const AVPacket *avpkt, unsigned size) |
117 |
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{ |
118 |
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RASCContext *s = avctx->priv_data; |
119 |
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GetByteContext *gb = &s->gb; |
120 |
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unsigned w, h, fmt; |
121 |
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int ret; |
122 |
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if (bytestream2_peek_le32(gb) != 0x65) { |
124 |
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if (!s->frame2->data[0] || !s->frame1->data[0]) |
125 |
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return AVERROR_INVALIDDATA; |
126 |
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127 |
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clear_plane(avctx, s->frame2); |
128 |
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clear_plane(avctx, s->frame1); |
129 |
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return 0; |
130 |
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} |
131 |
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✗ |
if (bytestream2_get_bytes_left(gb) < 72) |
132 |
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return AVERROR_INVALIDDATA; |
133 |
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134 |
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✗ |
bytestream2_skip(gb, 8); |
135 |
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✗ |
w = bytestream2_get_le32(gb); |
136 |
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h = bytestream2_get_le32(gb); |
137 |
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bytestream2_skip(gb, 30); |
138 |
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fmt = bytestream2_get_le16(gb); |
139 |
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bytestream2_skip(gb, 24); |
140 |
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141 |
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switch (fmt) { |
142 |
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case 8: s->stride = FFALIGN(w, 4); |
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s->bpp = 1; |
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fmt = AV_PIX_FMT_PAL8; break; |
145 |
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case 16: s->stride = w * 2; |
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s->bpp = 2; |
147 |
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fmt = AV_PIX_FMT_RGB555LE; break; |
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case 32: s->stride = w * 4; |
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s->bpp = 4; |
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fmt = AV_PIX_FMT_BGR0; break; |
151 |
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default: return AVERROR_INVALIDDATA; |
152 |
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} |
153 |
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ret = ff_set_dimensions(avctx, w, h); |
155 |
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if (ret < 0) |
156 |
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return ret; |
157 |
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avctx->width = w; |
158 |
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avctx->height = h; |
159 |
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avctx->pix_fmt = fmt; |
160 |
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161 |
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ret = init_frames(avctx); |
162 |
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if (ret < 0) |
163 |
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return ret; |
164 |
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165 |
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if (avctx->pix_fmt == AV_PIX_FMT_PAL8) { |
166 |
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uint32_t *pal = (uint32_t *)s->frame2->data[1]; |
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168 |
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for (int i = 0; i < 256; i++) |
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pal[i] = bytestream2_get_le32(gb) | 0xFF000000u; |
170 |
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} |
171 |
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172 |
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✗ |
return 0; |
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} |
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175 |
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static int decode_zlib(AVCodecContext *avctx, const AVPacket *avpkt, |
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unsigned size, unsigned uncompressed_size) |
177 |
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{ |
178 |
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✗ |
RASCContext *s = avctx->priv_data; |
179 |
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z_stream *const zstream = &s->zstream.zstream; |
180 |
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GetByteContext *gb = &s->gb; |
181 |
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int zret; |
182 |
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183 |
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✗ |
zret = inflateReset(zstream); |
184 |
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if (zret != Z_OK) { |
185 |
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av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret); |
186 |
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return AVERROR_EXTERNAL; |
187 |
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} |
188 |
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189 |
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av_fast_padded_malloc(&s->delta, &s->delta_size, uncompressed_size); |
190 |
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if (!s->delta) |
191 |
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return AVERROR(ENOMEM); |
192 |
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193 |
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✗ |
zstream->next_in = avpkt->data + bytestream2_tell(gb); |
194 |
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zstream->avail_in = FFMIN(size, bytestream2_get_bytes_left(gb)); |
195 |
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196 |
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zstream->next_out = s->delta; |
197 |
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zstream->avail_out = s->delta_size; |
198 |
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199 |
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✗ |
zret = inflate(zstream, Z_FINISH); |
200 |
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✗ |
if (zret != Z_STREAM_END) { |
201 |
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✗ |
av_log(avctx, AV_LOG_ERROR, |
202 |
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"Inflate failed with return code: %d.\n", zret); |
203 |
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✗ |
return AVERROR_INVALIDDATA; |
204 |
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} |
205 |
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206 |
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✗ |
return 0; |
207 |
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} |
208 |
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209 |
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✗ |
static int decode_move(AVCodecContext *avctx, |
210 |
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const AVPacket *avpkt, unsigned size) |
211 |
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{ |
212 |
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✗ |
RASCContext *s = avctx->priv_data; |
213 |
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✗ |
GetByteContext *gb = &s->gb; |
214 |
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GetByteContext mc; |
215 |
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unsigned pos, compression, nb_moves; |
216 |
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unsigned uncompressed_size; |
217 |
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int ret; |
218 |
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219 |
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✗ |
pos = bytestream2_tell(gb); |
220 |
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✗ |
bytestream2_skip(gb, 8); |
221 |
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✗ |
nb_moves = bytestream2_get_le32(gb); |
222 |
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bytestream2_skip(gb, 8); |
223 |
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✗ |
compression = bytestream2_get_le32(gb); |
224 |
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|
225 |
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✗ |
if (nb_moves > INT32_MAX / 16 || nb_moves > avctx->width * avctx->height) |
226 |
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✗ |
return AVERROR_INVALIDDATA; |
227 |
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|
228 |
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✗ |
uncompressed_size = 16 * nb_moves; |
229 |
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|
230 |
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✗ |
if (compression == 1) { |
231 |
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✗ |
ret = decode_zlib(avctx, avpkt, |
232 |
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✗ |
size - (bytestream2_tell(gb) - pos), |
233 |
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uncompressed_size); |
234 |
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✗ |
if (ret < 0) |
235 |
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✗ |
return ret; |
236 |
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✗ |
bytestream2_init(&mc, s->delta, uncompressed_size); |
237 |
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✗ |
} else if (compression == 0) { |
238 |
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✗ |
bytestream2_init(&mc, avpkt->data + bytestream2_tell(gb), |
239 |
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bytestream2_get_bytes_left(gb)); |
240 |
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✗ |
} else if (compression == 2) { |
241 |
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✗ |
avpriv_request_sample(avctx, "compression %d", compression); |
242 |
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✗ |
return AVERROR_PATCHWELCOME; |
243 |
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} else { |
244 |
|
✗ |
return AVERROR_INVALIDDATA; |
245 |
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} |
246 |
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|
247 |
|
✗ |
if (bytestream2_get_bytes_left(&mc) < uncompressed_size) |
248 |
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✗ |
return AVERROR_INVALIDDATA; |
249 |
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|
250 |
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✗ |
for (int i = 0; i < nb_moves; i++) { |
251 |
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int type, start_x, start_y, end_x, end_y, mov_x, mov_y; |
252 |
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uint8_t *e2, *b1, *b2; |
253 |
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int w, h; |
254 |
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|
255 |
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✗ |
type = bytestream2_get_le16(&mc); |
256 |
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✗ |
start_x = bytestream2_get_le16(&mc); |
257 |
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✗ |
start_y = bytestream2_get_le16(&mc); |
258 |
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✗ |
end_x = bytestream2_get_le16(&mc); |
259 |
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✗ |
end_y = bytestream2_get_le16(&mc); |
260 |
|
✗ |
mov_x = bytestream2_get_le16(&mc); |
261 |
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✗ |
mov_y = bytestream2_get_le16(&mc); |
262 |
|
✗ |
bytestream2_skip(&mc, 2); |
263 |
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|
264 |
|
✗ |
if (start_x >= avctx->width || start_y >= avctx->height || |
265 |
|
✗ |
end_x >= avctx->width || end_y >= avctx->height || |
266 |
|
✗ |
mov_x >= avctx->width || mov_y >= avctx->height) { |
267 |
|
✗ |
continue; |
268 |
|
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} |
269 |
|
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|
270 |
|
✗ |
if (start_x >= end_x || start_y >= end_y) |
271 |
|
✗ |
continue; |
272 |
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|
273 |
|
✗ |
w = end_x - start_x; |
274 |
|
✗ |
h = end_y - start_y; |
275 |
|
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|
276 |
|
✗ |
if (mov_x + w > avctx->width || mov_y + h > avctx->height) |
277 |
|
✗ |
continue; |
278 |
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|
279 |
|
✗ |
if (!s->frame2->data[0] || !s->frame1->data[0]) |
280 |
|
✗ |
return AVERROR_INVALIDDATA; |
281 |
|
|
|
282 |
|
✗ |
b1 = s->frame1->data[0] + s->frame1->linesize[0] * (start_y + h - 1) + start_x * s->bpp; |
283 |
|
✗ |
b2 = s->frame2->data[0] + s->frame2->linesize[0] * (start_y + h - 1) + start_x * s->bpp; |
284 |
|
✗ |
e2 = s->frame2->data[0] + s->frame2->linesize[0] * (mov_y + h - 1) + mov_x * s->bpp; |
285 |
|
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|
286 |
|
✗ |
if (type == 2) { |
287 |
|
✗ |
for (int j = 0; j < h; j++) { |
288 |
|
✗ |
memcpy(b1, b2, w * s->bpp); |
289 |
|
✗ |
b1 -= s->frame1->linesize[0]; |
290 |
|
✗ |
b2 -= s->frame2->linesize[0]; |
291 |
|
|
} |
292 |
|
✗ |
} else if (type == 1) { |
293 |
|
✗ |
for (int j = 0; j < h; j++) { |
294 |
|
✗ |
memset(b2, 0, w * s->bpp); |
295 |
|
✗ |
b2 -= s->frame2->linesize[0]; |
296 |
|
|
} |
297 |
|
✗ |
} else if (type == 0) { |
298 |
|
|
uint8_t *buffer; |
299 |
|
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|
300 |
|
✗ |
av_fast_padded_malloc(&s->delta, &s->delta_size, w * h * s->bpp); |
301 |
|
✗ |
buffer = s->delta; |
302 |
|
✗ |
if (!buffer) |
303 |
|
✗ |
return AVERROR(ENOMEM); |
304 |
|
|
|
305 |
|
✗ |
for (int j = 0; j < h; j++) { |
306 |
|
✗ |
memcpy(buffer + j * w * s->bpp, e2, w * s->bpp); |
307 |
|
✗ |
e2 -= s->frame2->linesize[0]; |
308 |
|
|
} |
309 |
|
|
|
310 |
|
✗ |
for (int j = 0; j < h; j++) { |
311 |
|
✗ |
memcpy(b2, buffer + j * w * s->bpp, w * s->bpp); |
312 |
|
✗ |
b2 -= s->frame2->linesize[0]; |
313 |
|
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} |
314 |
|
|
} else { |
315 |
|
✗ |
return AVERROR_INVALIDDATA; |
316 |
|
|
} |
317 |
|
|
} |
318 |
|
|
|
319 |
|
✗ |
bytestream2_skip(gb, size - (bytestream2_tell(gb) - pos)); |
320 |
|
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|
321 |
|
✗ |
return 0; |
322 |
|
|
} |
323 |
|
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|
324 |
|
|
#define NEXT_LINE \ |
325 |
|
|
if (cx >= w * s->bpp) { \ |
326 |
|
|
cx = 0; \ |
327 |
|
|
cy--; \ |
328 |
|
|
b1 -= s->frame1->linesize[0]; \ |
329 |
|
|
b2 -= s->frame2->linesize[0]; \ |
330 |
|
|
} \ |
331 |
|
|
len--; |
332 |
|
|
|
333 |
|
✗ |
static int decode_dlta(AVCodecContext *avctx, |
334 |
|
|
const AVPacket *avpkt, unsigned size) |
335 |
|
|
{ |
336 |
|
✗ |
RASCContext *s = avctx->priv_data; |
337 |
|
✗ |
GetByteContext *gb = &s->gb; |
338 |
|
|
GetByteContext dc; |
339 |
|
|
unsigned uncompressed_size, pos; |
340 |
|
|
unsigned x, y, w, h; |
341 |
|
|
int ret, cx, cy, compression; |
342 |
|
|
uint8_t *b1, *b2; |
343 |
|
|
|
344 |
|
✗ |
pos = bytestream2_tell(gb); |
345 |
|
✗ |
bytestream2_skip(gb, 12); |
346 |
|
✗ |
uncompressed_size = bytestream2_get_le32(gb); |
347 |
|
✗ |
x = bytestream2_get_le32(gb); |
348 |
|
✗ |
y = bytestream2_get_le32(gb); |
349 |
|
✗ |
w = bytestream2_get_le32(gb); |
350 |
|
✗ |
h = bytestream2_get_le32(gb); |
351 |
|
|
|
352 |
|
✗ |
if (x >= avctx->width || y >= avctx->height || |
353 |
|
✗ |
w > avctx->width || h > avctx->height) |
354 |
|
✗ |
return AVERROR_INVALIDDATA; |
355 |
|
|
|
356 |
|
✗ |
if (x + w > avctx->width || y + h > avctx->height) |
357 |
|
✗ |
return AVERROR_INVALIDDATA; |
358 |
|
|
|
359 |
|
✗ |
bytestream2_skip(gb, 4); |
360 |
|
✗ |
compression = bytestream2_get_le32(gb); |
361 |
|
|
|
362 |
|
✗ |
if (compression == 1) { |
363 |
|
✗ |
if (w * h * s->bpp * 3 < uncompressed_size) |
364 |
|
✗ |
return AVERROR_INVALIDDATA; |
365 |
|
✗ |
ret = decode_zlib(avctx, avpkt, size, uncompressed_size); |
366 |
|
✗ |
if (ret < 0) |
367 |
|
✗ |
return ret; |
368 |
|
✗ |
bytestream2_init(&dc, s->delta, uncompressed_size); |
369 |
|
✗ |
} else if (compression == 0) { |
370 |
|
✗ |
if (bytestream2_get_bytes_left(gb) < uncompressed_size) |
371 |
|
✗ |
return AVERROR_INVALIDDATA; |
372 |
|
✗ |
bytestream2_init(&dc, avpkt->data + bytestream2_tell(gb), |
373 |
|
|
uncompressed_size); |
374 |
|
✗ |
} else if (compression == 2) { |
375 |
|
✗ |
avpriv_request_sample(avctx, "compression %d", compression); |
376 |
|
✗ |
return AVERROR_PATCHWELCOME; |
377 |
|
|
} else { |
378 |
|
✗ |
return AVERROR_INVALIDDATA; |
379 |
|
|
} |
380 |
|
|
|
381 |
|
✗ |
if (!s->frame2->data[0] || !s->frame1->data[0]) |
382 |
|
✗ |
return AVERROR_INVALIDDATA; |
383 |
|
|
|
384 |
|
✗ |
b1 = s->frame1->data[0] + s->frame1->linesize[0] * (y + h - 1) + x * s->bpp; |
385 |
|
✗ |
b2 = s->frame2->data[0] + s->frame2->linesize[0] * (y + h - 1) + x * s->bpp; |
386 |
|
✗ |
cx = 0, cy = h; |
387 |
|
✗ |
while (bytestream2_get_bytes_left(&dc) > 0) { |
388 |
|
✗ |
int type = bytestream2_get_byte(&dc); |
389 |
|
✗ |
int len = bytestream2_get_byte(&dc); |
390 |
|
|
unsigned fill; |
391 |
|
|
|
392 |
|
✗ |
switch (type) { |
393 |
|
✗ |
case 1: |
394 |
|
✗ |
while (len > 0 && cy > 0) { |
395 |
|
✗ |
cx++; |
396 |
|
✗ |
NEXT_LINE |
397 |
|
|
} |
398 |
|
✗ |
break; |
399 |
|
✗ |
case 2: |
400 |
|
✗ |
while (len > 0 && cy > 0) { |
401 |
|
✗ |
int v0 = b1[cx]; |
402 |
|
✗ |
int v1 = b2[cx]; |
403 |
|
|
|
404 |
|
✗ |
b2[cx] = v0; |
405 |
|
✗ |
b1[cx] = v1; |
406 |
|
✗ |
cx++; |
407 |
|
✗ |
NEXT_LINE |
408 |
|
|
} |
409 |
|
✗ |
break; |
410 |
|
✗ |
case 3: |
411 |
|
✗ |
while (len > 0 && cy > 0) { |
412 |
|
✗ |
fill = bytestream2_get_byte(&dc); |
413 |
|
✗ |
b1[cx] = b2[cx]; |
414 |
|
✗ |
b2[cx] = fill; |
415 |
|
✗ |
cx++; |
416 |
|
✗ |
NEXT_LINE |
417 |
|
|
} |
418 |
|
✗ |
break; |
419 |
|
✗ |
case 4: |
420 |
|
✗ |
fill = bytestream2_get_byte(&dc); |
421 |
|
✗ |
while (len > 0 && cy > 0) { |
422 |
|
✗ |
AV_WL32(b1 + cx, AV_RL32(b2 + cx)); |
423 |
|
✗ |
AV_WL32(b2 + cx, fill); |
424 |
|
✗ |
cx++; |
425 |
|
✗ |
NEXT_LINE |
426 |
|
|
} |
427 |
|
✗ |
break; |
428 |
|
✗ |
case 7: |
429 |
|
✗ |
fill = bytestream2_get_le32(&dc); |
430 |
|
✗ |
while (len > 0 && cy > 0) { |
431 |
|
✗ |
AV_WL32(b1 + cx, AV_RL32(b2 + cx)); |
432 |
|
✗ |
AV_WL32(b2 + cx, fill); |
433 |
|
✗ |
cx += 4; |
434 |
|
✗ |
NEXT_LINE |
435 |
|
|
} |
436 |
|
✗ |
break; |
437 |
|
✗ |
case 10: |
438 |
|
✗ |
while (len > 0 && cy > 0) { |
439 |
|
✗ |
cx += 4; |
440 |
|
✗ |
NEXT_LINE |
441 |
|
|
} |
442 |
|
✗ |
break; |
443 |
|
✗ |
case 12: |
444 |
|
✗ |
while (len > 0 && cy > 0) { |
445 |
|
|
unsigned v0, v1; |
446 |
|
|
|
447 |
|
✗ |
v0 = AV_RL32(b2 + cx); |
448 |
|
✗ |
v1 = AV_RL32(b1 + cx); |
449 |
|
✗ |
AV_WL32(b2 + cx, v1); |
450 |
|
✗ |
AV_WL32(b1 + cx, v0); |
451 |
|
✗ |
cx += 4; |
452 |
|
✗ |
NEXT_LINE |
453 |
|
|
} |
454 |
|
✗ |
break; |
455 |
|
✗ |
case 13: |
456 |
|
✗ |
while (len > 0 && cy > 0) { |
457 |
|
✗ |
fill = bytestream2_get_le32(&dc); |
458 |
|
✗ |
AV_WL32(b1 + cx, AV_RL32(b2 + cx)); |
459 |
|
✗ |
AV_WL32(b2 + cx, fill); |
460 |
|
✗ |
cx += 4; |
461 |
|
✗ |
NEXT_LINE |
462 |
|
|
} |
463 |
|
✗ |
break; |
464 |
|
✗ |
default: |
465 |
|
✗ |
avpriv_request_sample(avctx, "runlen %d", type); |
466 |
|
✗ |
return AVERROR_INVALIDDATA; |
467 |
|
|
} |
468 |
|
|
} |
469 |
|
|
|
470 |
|
✗ |
bytestream2_skip(gb, size - (bytestream2_tell(gb) - pos)); |
471 |
|
|
|
472 |
|
✗ |
return 0; |
473 |
|
|
} |
474 |
|
|
|
475 |
|
✗ |
static int decode_kfrm(AVCodecContext *avctx, |
476 |
|
|
const AVPacket *avpkt, unsigned size) |
477 |
|
|
{ |
478 |
|
✗ |
RASCContext *s = avctx->priv_data; |
479 |
|
✗ |
z_stream *const zstream = &s->zstream.zstream; |
480 |
|
✗ |
GetByteContext *gb = &s->gb; |
481 |
|
|
uint8_t *dst; |
482 |
|
|
unsigned pos; |
483 |
|
|
int zret, ret; |
484 |
|
|
|
485 |
|
✗ |
pos = bytestream2_tell(gb); |
486 |
|
✗ |
if (bytestream2_peek_le32(gb) == 0x65) { |
487 |
|
✗ |
ret = decode_fint(avctx, avpkt, size); |
488 |
|
✗ |
if (ret < 0) |
489 |
|
✗ |
return ret; |
490 |
|
|
} |
491 |
|
|
|
492 |
|
✗ |
if (!s->frame2->data[0]) |
493 |
|
✗ |
return AVERROR_INVALIDDATA; |
494 |
|
|
|
495 |
|
✗ |
zret = inflateReset(zstream); |
496 |
|
✗ |
if (zret != Z_OK) { |
497 |
|
✗ |
av_log(avctx, AV_LOG_ERROR, "Inflate reset error: %d\n", zret); |
498 |
|
✗ |
return AVERROR_EXTERNAL; |
499 |
|
|
} |
500 |
|
|
|
501 |
|
✗ |
zstream->next_in = avpkt->data + bytestream2_tell(gb); |
502 |
|
✗ |
zstream->avail_in = bytestream2_get_bytes_left(gb); |
503 |
|
|
|
504 |
|
✗ |
dst = s->frame2->data[0] + (avctx->height - 1) * s->frame2->linesize[0]; |
505 |
|
✗ |
for (int i = 0; i < avctx->height; i++) { |
506 |
|
✗ |
zstream->next_out = dst; |
507 |
|
✗ |
zstream->avail_out = s->stride; |
508 |
|
|
|
509 |
|
✗ |
zret = inflate(zstream, Z_SYNC_FLUSH); |
510 |
|
✗ |
if (zret != Z_OK && zret != Z_STREAM_END) { |
511 |
|
✗ |
av_log(avctx, AV_LOG_ERROR, |
512 |
|
|
"Inflate failed with return code: %d.\n", zret); |
513 |
|
✗ |
return AVERROR_INVALIDDATA; |
514 |
|
|
} |
515 |
|
|
|
516 |
|
✗ |
dst -= s->frame2->linesize[0]; |
517 |
|
|
} |
518 |
|
|
|
519 |
|
✗ |
dst = s->frame1->data[0] + (avctx->height - 1) * s->frame1->linesize[0]; |
520 |
|
✗ |
for (int i = 0; i < avctx->height; i++) { |
521 |
|
✗ |
zstream->next_out = dst; |
522 |
|
✗ |
zstream->avail_out = s->stride; |
523 |
|
|
|
524 |
|
✗ |
zret = inflate(zstream, Z_SYNC_FLUSH); |
525 |
|
✗ |
if (zret != Z_OK && zret != Z_STREAM_END) { |
526 |
|
✗ |
av_log(avctx, AV_LOG_ERROR, |
527 |
|
|
"Inflate failed with return code: %d.\n", zret); |
528 |
|
✗ |
return AVERROR_INVALIDDATA; |
529 |
|
|
} |
530 |
|
|
|
531 |
|
✗ |
dst -= s->frame1->linesize[0]; |
532 |
|
|
} |
533 |
|
|
|
534 |
|
✗ |
bytestream2_skip(gb, size - (bytestream2_tell(gb) - pos)); |
535 |
|
|
|
536 |
|
✗ |
return 0; |
537 |
|
|
} |
538 |
|
|
|
539 |
|
✗ |
static int decode_mous(AVCodecContext *avctx, |
540 |
|
|
const AVPacket *avpkt, unsigned size) |
541 |
|
|
{ |
542 |
|
✗ |
RASCContext *s = avctx->priv_data; |
543 |
|
✗ |
GetByteContext *gb = &s->gb; |
544 |
|
|
unsigned w, h, pos, uncompressed_size; |
545 |
|
|
int ret; |
546 |
|
|
|
547 |
|
✗ |
pos = bytestream2_tell(gb); |
548 |
|
✗ |
bytestream2_skip(gb, 8); |
549 |
|
✗ |
w = bytestream2_get_le32(gb); |
550 |
|
✗ |
h = bytestream2_get_le32(gb); |
551 |
|
✗ |
bytestream2_skip(gb, 12); |
552 |
|
✗ |
uncompressed_size = bytestream2_get_le32(gb); |
553 |
|
|
|
554 |
|
✗ |
if (w > avctx->width || h > avctx->height) |
555 |
|
✗ |
return AVERROR_INVALIDDATA; |
556 |
|
|
|
557 |
|
✗ |
if (uncompressed_size != 3 * w * h) |
558 |
|
✗ |
return AVERROR_INVALIDDATA; |
559 |
|
|
|
560 |
|
✗ |
av_fast_padded_malloc(&s->cursor, &s->cursor_size, uncompressed_size); |
561 |
|
✗ |
if (!s->cursor) |
562 |
|
✗ |
return AVERROR(ENOMEM); |
563 |
|
|
|
564 |
|
✗ |
ret = decode_zlib(avctx, avpkt, |
565 |
|
✗ |
size - (bytestream2_tell(gb) - pos), |
566 |
|
|
uncompressed_size); |
567 |
|
✗ |
if (ret < 0) |
568 |
|
✗ |
return ret; |
569 |
|
✗ |
memcpy(s->cursor, s->delta, uncompressed_size); |
570 |
|
|
|
571 |
|
✗ |
bytestream2_skip(gb, size - (bytestream2_tell(gb) - pos)); |
572 |
|
|
|
573 |
|
✗ |
s->cursor_w = w; |
574 |
|
✗ |
s->cursor_h = h; |
575 |
|
|
|
576 |
|
✗ |
return 0; |
577 |
|
|
} |
578 |
|
|
|
579 |
|
✗ |
static int decode_mpos(AVCodecContext *avctx, |
580 |
|
|
const AVPacket *avpkt, unsigned size) |
581 |
|
|
{ |
582 |
|
✗ |
RASCContext *s = avctx->priv_data; |
583 |
|
✗ |
GetByteContext *gb = &s->gb; |
584 |
|
|
unsigned pos; |
585 |
|
|
|
586 |
|
✗ |
pos = bytestream2_tell(gb); |
587 |
|
✗ |
bytestream2_skip(gb, 8); |
588 |
|
✗ |
s->cursor_x = bytestream2_get_le32(gb); |
589 |
|
✗ |
s->cursor_y = bytestream2_get_le32(gb); |
590 |
|
|
|
591 |
|
✗ |
bytestream2_skip(gb, size - (bytestream2_tell(gb) - pos)); |
592 |
|
|
|
593 |
|
✗ |
return 0; |
594 |
|
|
} |
595 |
|
|
|
596 |
|
✗ |
static void draw_cursor(AVCodecContext *avctx) |
597 |
|
|
{ |
598 |
|
✗ |
RASCContext *s = avctx->priv_data; |
599 |
|
|
uint8_t *dst, *pal; |
600 |
|
|
|
601 |
|
✗ |
if (!s->cursor) |
602 |
|
✗ |
return; |
603 |
|
|
|
604 |
|
✗ |
if (s->cursor_x >= avctx->width || s->cursor_y >= avctx->height) |
605 |
|
✗ |
return; |
606 |
|
|
|
607 |
|
✗ |
if (s->cursor_x + s->cursor_w > avctx->width || |
608 |
|
✗ |
s->cursor_y + s->cursor_h > avctx->height) |
609 |
|
✗ |
return; |
610 |
|
|
|
611 |
|
✗ |
if (avctx->pix_fmt == AV_PIX_FMT_PAL8) { |
612 |
|
✗ |
pal = s->frame->data[1]; |
613 |
|
✗ |
for (int i = 0; i < s->cursor_h; i++) { |
614 |
|
✗ |
for (int j = 0; j < s->cursor_w; j++) { |
615 |
|
✗ |
int cr = s->cursor[3 * s->cursor_w * (s->cursor_h - i - 1) + 3 * j + 0]; |
616 |
|
✗ |
int cg = s->cursor[3 * s->cursor_w * (s->cursor_h - i - 1) + 3 * j + 1]; |
617 |
|
✗ |
int cb = s->cursor[3 * s->cursor_w * (s->cursor_h - i - 1) + 3 * j + 2]; |
618 |
|
✗ |
int best = INT_MAX; |
619 |
|
✗ |
int index = 0; |
620 |
|
|
int dist; |
621 |
|
|
|
622 |
|
✗ |
if (cr == s->cursor[0] && cg == s->cursor[1] && cb == s->cursor[2]) |
623 |
|
✗ |
continue; |
624 |
|
|
|
625 |
|
✗ |
dst = s->frame->data[0] + s->frame->linesize[0] * (s->cursor_y + i) + (s->cursor_x + j); |
626 |
|
✗ |
for (int k = 0; k < 256; k++) { |
627 |
|
✗ |
int pr = pal[k * 4 + 0]; |
628 |
|
✗ |
int pg = pal[k * 4 + 1]; |
629 |
|
✗ |
int pb = pal[k * 4 + 2]; |
630 |
|
|
|
631 |
|
✗ |
dist = FFABS(cr - pr) + FFABS(cg - pg) + FFABS(cb - pb); |
632 |
|
✗ |
if (dist < best) { |
633 |
|
✗ |
best = dist; |
634 |
|
✗ |
index = k; |
635 |
|
|
} |
636 |
|
|
} |
637 |
|
✗ |
dst[0] = index; |
638 |
|
|
} |
639 |
|
|
} |
640 |
|
✗ |
} else if (avctx->pix_fmt == AV_PIX_FMT_RGB555LE) { |
641 |
|
✗ |
for (int i = 0; i < s->cursor_h; i++) { |
642 |
|
✗ |
for (int j = 0; j < s->cursor_w; j++) { |
643 |
|
✗ |
int cr = s->cursor[3 * s->cursor_w * (s->cursor_h - i - 1) + 3 * j + 0]; |
644 |
|
✗ |
int cg = s->cursor[3 * s->cursor_w * (s->cursor_h - i - 1) + 3 * j + 1]; |
645 |
|
✗ |
int cb = s->cursor[3 * s->cursor_w * (s->cursor_h - i - 1) + 3 * j + 2]; |
646 |
|
|
|
647 |
|
✗ |
if (cr == s->cursor[0] && cg == s->cursor[1] && cb == s->cursor[2]) |
648 |
|
✗ |
continue; |
649 |
|
|
|
650 |
|
✗ |
cr >>= 3; cg >>=3; cb >>= 3; |
651 |
|
✗ |
dst = s->frame->data[0] + s->frame->linesize[0] * (s->cursor_y + i) + 2 * (s->cursor_x + j); |
652 |
|
✗ |
AV_WL16(dst, cr | cg << 5 | cb << 10); |
653 |
|
|
} |
654 |
|
|
} |
655 |
|
✗ |
} else if (avctx->pix_fmt == AV_PIX_FMT_BGR0) { |
656 |
|
✗ |
for (int i = 0; i < s->cursor_h; i++) { |
657 |
|
✗ |
for (int j = 0; j < s->cursor_w; j++) { |
658 |
|
✗ |
int cr = s->cursor[3 * s->cursor_w * (s->cursor_h - i - 1) + 3 * j + 0]; |
659 |
|
✗ |
int cg = s->cursor[3 * s->cursor_w * (s->cursor_h - i - 1) + 3 * j + 1]; |
660 |
|
✗ |
int cb = s->cursor[3 * s->cursor_w * (s->cursor_h - i - 1) + 3 * j + 2]; |
661 |
|
|
|
662 |
|
✗ |
if (cr == s->cursor[0] && cg == s->cursor[1] && cb == s->cursor[2]) |
663 |
|
✗ |
continue; |
664 |
|
|
|
665 |
|
✗ |
dst = s->frame->data[0] + s->frame->linesize[0] * (s->cursor_y + i) + 4 * (s->cursor_x + j); |
666 |
|
✗ |
dst[0] = cb; |
667 |
|
✗ |
dst[1] = cg; |
668 |
|
✗ |
dst[2] = cr; |
669 |
|
|
} |
670 |
|
|
} |
671 |
|
|
} |
672 |
|
|
} |
673 |
|
|
|
674 |
|
✗ |
static int decode_frame(AVCodecContext *avctx, AVFrame *frame, |
675 |
|
|
int *got_frame, AVPacket *avpkt) |
676 |
|
|
{ |
677 |
|
✗ |
RASCContext *s = avctx->priv_data; |
678 |
|
✗ |
GetByteContext *gb = &s->gb; |
679 |
|
✗ |
int ret, intra = 0; |
680 |
|
|
|
681 |
|
✗ |
bytestream2_init(gb, avpkt->data, avpkt->size); |
682 |
|
|
|
683 |
|
✗ |
if (bytestream2_peek_le32(gb) == EMPT) |
684 |
|
✗ |
return avpkt->size; |
685 |
|
|
|
686 |
|
✗ |
s->frame = frame; |
687 |
|
|
|
688 |
|
✗ |
while (bytestream2_get_bytes_left(gb) > 0) { |
689 |
|
✗ |
unsigned type, size = 0; |
690 |
|
|
|
691 |
|
✗ |
if (bytestream2_get_bytes_left(gb) < 8) |
692 |
|
✗ |
return AVERROR_INVALIDDATA; |
693 |
|
|
|
694 |
|
✗ |
type = bytestream2_get_le32(gb); |
695 |
|
✗ |
if (type == KBND || type == BNDL) { |
696 |
|
✗ |
intra = type == KBND; |
697 |
|
✗ |
type = bytestream2_get_le32(gb); |
698 |
|
|
} |
699 |
|
|
|
700 |
|
✗ |
size = bytestream2_get_le32(gb); |
701 |
|
✗ |
if (bytestream2_get_bytes_left(gb) < size) |
702 |
|
✗ |
return AVERROR_INVALIDDATA; |
703 |
|
|
|
704 |
|
✗ |
switch (type) { |
705 |
|
✗ |
case FINT: |
706 |
|
|
case INIT: |
707 |
|
✗ |
ret = decode_fint(avctx, avpkt, size); |
708 |
|
✗ |
break; |
709 |
|
✗ |
case KFRM: |
710 |
|
✗ |
ret = decode_kfrm(avctx, avpkt, size); |
711 |
|
✗ |
break; |
712 |
|
✗ |
case DLTA: |
713 |
|
✗ |
ret = decode_dlta(avctx, avpkt, size); |
714 |
|
✗ |
break; |
715 |
|
✗ |
case MOVE: |
716 |
|
✗ |
ret = decode_move(avctx, avpkt, size); |
717 |
|
✗ |
break; |
718 |
|
✗ |
case MOUS: |
719 |
|
✗ |
ret = decode_mous(avctx, avpkt, size); |
720 |
|
✗ |
break; |
721 |
|
✗ |
case MPOS: |
722 |
|
✗ |
ret = decode_mpos(avctx, avpkt, size); |
723 |
|
✗ |
break; |
724 |
|
✗ |
default: |
725 |
|
✗ |
bytestream2_skip(gb, size); |
726 |
|
✗ |
ret = 0; |
727 |
|
|
} |
728 |
|
|
|
729 |
|
✗ |
if (ret < 0) |
730 |
|
✗ |
return ret; |
731 |
|
|
} |
732 |
|
|
|
733 |
|
✗ |
if (!s->frame2->data[0] || !s->frame1->data[0]) |
734 |
|
✗ |
return AVERROR_INVALIDDATA; |
735 |
|
|
|
736 |
|
✗ |
if ((ret = ff_get_buffer(avctx, s->frame, 0)) < 0) |
737 |
|
✗ |
return ret; |
738 |
|
|
|
739 |
|
✗ |
copy_plane(avctx, s->frame2, s->frame); |
740 |
|
✗ |
if (avctx->pix_fmt == AV_PIX_FMT_PAL8) |
741 |
|
✗ |
memcpy(s->frame->data[1], s->frame2->data[1], 1024); |
742 |
|
✗ |
if (!s->skip_cursor) |
743 |
|
✗ |
draw_cursor(avctx); |
744 |
|
|
|
745 |
|
✗ |
s->frame->key_frame = intra; |
746 |
|
✗ |
s->frame->pict_type = intra ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P; |
747 |
|
|
|
748 |
|
✗ |
*got_frame = 1; |
749 |
|
|
|
750 |
|
✗ |
return avpkt->size; |
751 |
|
|
} |
752 |
|
|
|
753 |
|
✗ |
static av_cold int decode_init(AVCodecContext *avctx) |
754 |
|
|
{ |
755 |
|
✗ |
RASCContext *s = avctx->priv_data; |
756 |
|
|
|
757 |
|
✗ |
s->frame1 = av_frame_alloc(); |
758 |
|
✗ |
s->frame2 = av_frame_alloc(); |
759 |
|
✗ |
if (!s->frame1 || !s->frame2) |
760 |
|
✗ |
return AVERROR(ENOMEM); |
761 |
|
|
|
762 |
|
✗ |
return ff_inflate_init(&s->zstream, avctx); |
763 |
|
|
} |
764 |
|
|
|
765 |
|
✗ |
static av_cold int decode_close(AVCodecContext *avctx) |
766 |
|
|
{ |
767 |
|
✗ |
RASCContext *s = avctx->priv_data; |
768 |
|
|
|
769 |
|
✗ |
av_freep(&s->cursor); |
770 |
|
✗ |
s->cursor_size = 0; |
771 |
|
✗ |
av_freep(&s->delta); |
772 |
|
✗ |
s->delta_size = 0; |
773 |
|
✗ |
av_frame_free(&s->frame1); |
774 |
|
✗ |
av_frame_free(&s->frame2); |
775 |
|
✗ |
ff_inflate_end(&s->zstream); |
776 |
|
|
|
777 |
|
✗ |
return 0; |
778 |
|
|
} |
779 |
|
|
|
780 |
|
✗ |
static void decode_flush(AVCodecContext *avctx) |
781 |
|
|
{ |
782 |
|
✗ |
RASCContext *s = avctx->priv_data; |
783 |
|
|
|
784 |
|
✗ |
clear_plane(avctx, s->frame1); |
785 |
|
✗ |
clear_plane(avctx, s->frame2); |
786 |
|
|
} |
787 |
|
|
|
788 |
|
|
static const AVOption options[] = { |
789 |
|
|
{ "skip_cursor", "skip the cursor", offsetof(RASCContext, skip_cursor), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM }, |
790 |
|
|
{ NULL }, |
791 |
|
|
}; |
792 |
|
|
|
793 |
|
|
static const AVClass rasc_decoder_class = { |
794 |
|
|
.class_name = "rasc decoder", |
795 |
|
|
.item_name = av_default_item_name, |
796 |
|
|
.option = options, |
797 |
|
|
.version = LIBAVUTIL_VERSION_INT, |
798 |
|
|
}; |
799 |
|
|
|
800 |
|
|
const FFCodec ff_rasc_decoder = { |
801 |
|
|
.p.name = "rasc", |
802 |
|
|
.p.long_name = NULL_IF_CONFIG_SMALL("RemotelyAnywhere Screen Capture"), |
803 |
|
|
.p.type = AVMEDIA_TYPE_VIDEO, |
804 |
|
|
.p.id = AV_CODEC_ID_RASC, |
805 |
|
|
.priv_data_size = sizeof(RASCContext), |
806 |
|
|
.init = decode_init, |
807 |
|
|
.close = decode_close, |
808 |
|
|
FF_CODEC_DECODE_CB(decode_frame), |
809 |
|
|
.flush = decode_flush, |
810 |
|
|
.p.capabilities = AV_CODEC_CAP_DR1, |
811 |
|
|
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | |
812 |
|
|
FF_CODEC_CAP_INIT_CLEANUP, |
813 |
|
|
.p.priv_class = &rasc_decoder_class, |
814 |
|
|
}; |
815 |
|
|
|