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/* |
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* FLI/FLC Animation Video Decoder |
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* Copyright (C) 2003, 2004 The FFmpeg project |
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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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/** |
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* @file |
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* Autodesk Animator FLI/FLC Video Decoder |
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* by Mike Melanson (melanson@pcisys.net) |
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* for more information on the .fli/.flc file format and all of its many |
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* variations, visit: |
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* http://www.compuphase.com/flic.htm |
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* |
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* This decoder outputs PAL8/RGB555/RGB565/BGR24. To use this decoder, be |
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* sure that your demuxer sends the FLI file header to the decoder via |
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* the extradata chunk in AVCodecContext. The chunk should be 128 bytes |
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* large. The only exception is for FLI files from the game "Magic Carpet", |
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* in which the header is only 12 bytes. |
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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/intreadwrite.h" |
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#include "avcodec.h" |
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#include "bytestream.h" |
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#include "internal.h" |
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#include "mathops.h" |
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#define FLI_256_COLOR 4 |
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#define FLI_DELTA 7 |
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#define FLI_COLOR 11 |
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#define FLI_LC 12 |
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#define FLI_BLACK 13 |
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#define FLI_BRUN 15 |
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#define FLI_COPY 16 |
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#define FLI_MINI 18 |
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#define FLI_DTA_BRUN 25 |
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#define FLI_DTA_COPY 26 |
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#define FLI_DTA_LC 27 |
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#define FLI_TYPE_CODE (0xAF11) |
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#define FLC_FLX_TYPE_CODE (0xAF12) |
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#define FLC_DTA_TYPE_CODE (0xAF44) /* Marks an "Extended FLC" comes from Dave's Targa Animator (DTA) */ |
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#define FLC_MAGIC_CARPET_SYNTHETIC_TYPE_CODE (0xAF13) |
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#define CHECK_PIXEL_PTR(n) \ |
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if (pixel_ptr + n > pixel_limit) { \ |
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av_log (s->avctx, AV_LOG_ERROR, "Invalid pixel_ptr = %d > pixel_limit = %d\n", \ |
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pixel_ptr + n, pixel_limit); \ |
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return AVERROR_INVALIDDATA; \ |
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} \ |
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typedef struct FlicDecodeContext { |
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AVCodecContext *avctx; |
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AVFrame *frame; |
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unsigned int palette[256]; |
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int new_palette; |
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int fli_type; /* either 0xAF11 or 0xAF12, affects palette resolution */ |
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} FlicDecodeContext; |
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static av_cold int flic_decode_init(AVCodecContext *avctx) |
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{ |
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FlicDecodeContext *s = avctx->priv_data; |
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unsigned char *fli_header = (unsigned char *)avctx->extradata; |
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int depth; |
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✓✗ |
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if (avctx->extradata_size != 0 && |
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✓✓ |
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avctx->extradata_size != 12 && |
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✗✓ |
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avctx->extradata_size != 128 && |
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avctx->extradata_size != 256 && |
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avctx->extradata_size != 904 && |
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avctx->extradata_size != 1024) { |
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av_log(avctx, AV_LOG_ERROR, "Unexpected extradata size %d\n", avctx->extradata_size); |
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return AVERROR_INVALIDDATA; |
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} |
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s->avctx = avctx; |
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✓✓ |
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if (s->avctx->extradata_size == 12) { |
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/* special case for magic carpet FLIs */ |
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s->fli_type = FLC_MAGIC_CARPET_SYNTHETIC_TYPE_CODE; |
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depth = 8; |
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✗✓ |
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} else if (avctx->extradata_size == 1024) { |
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uint8_t *ptr = avctx->extradata; |
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int i; |
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for (i = 0; i < 256; i++) { |
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s->palette[i] = AV_RL32(ptr); |
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ptr += 4; |
109 |
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} |
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depth = 8; |
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/* FLI in MOV, see e.g. FFmpeg trac issue #626 */ |
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✓✗ |
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} else if (avctx->extradata_size == 0 || |
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✓✗ |
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avctx->extradata_size == 256 || |
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/* see FFmpeg ticket #1234 */ |
115 |
✗✓ |
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avctx->extradata_size == 904) { |
116 |
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s->fli_type = FLI_TYPE_CODE; |
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depth = 8; |
118 |
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} else { |
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s->fli_type = AV_RL16(&fli_header[4]); |
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depth = AV_RL16(&fli_header[12]); |
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} |
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✗✓ |
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if (depth == 0) { |
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depth = 8; /* Some FLC generators set depth to zero, when they mean 8Bpp. Fix up here */ |
125 |
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} |
126 |
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✓✓✗✓
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if ((s->fli_type == FLC_FLX_TYPE_CODE) && (depth == 16)) { |
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depth = 15; /* Original Autodesk FLX's say the depth is 16Bpp when it is really 15Bpp */ |
129 |
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} |
130 |
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✓✗✗✗
✗ |
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switch (depth) { |
132 |
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case 8 : avctx->pix_fmt = AV_PIX_FMT_PAL8; break; |
133 |
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case 15 : avctx->pix_fmt = AV_PIX_FMT_RGB555; break; |
134 |
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case 16 : avctx->pix_fmt = AV_PIX_FMT_RGB565; break; |
135 |
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case 24 : avctx->pix_fmt = AV_PIX_FMT_BGR24; break; |
136 |
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default : |
137 |
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av_log(avctx, AV_LOG_ERROR, "Unknown FLC/FLX depth of %d Bpp is unsupported.\n",depth); |
138 |
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return AVERROR_INVALIDDATA; |
139 |
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} |
140 |
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141 |
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s->frame = av_frame_alloc(); |
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✗✓ |
8 |
if (!s->frame) |
143 |
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return AVERROR(ENOMEM); |
144 |
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145 |
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s->new_palette = 0; |
146 |
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147 |
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8 |
return 0; |
148 |
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} |
149 |
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150 |
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static int flic_decode_frame_8BPP(AVCodecContext *avctx, |
151 |
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void *data, int *got_frame, |
152 |
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const uint8_t *buf, int buf_size) |
153 |
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{ |
154 |
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FlicDecodeContext *s = avctx->priv_data; |
155 |
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156 |
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GetByteContext g2; |
157 |
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int pixel_ptr; |
158 |
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int palette_ptr; |
159 |
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unsigned char palette_idx1; |
160 |
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unsigned char palette_idx2; |
161 |
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162 |
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unsigned int frame_size; |
163 |
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int num_chunks; |
164 |
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165 |
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unsigned int chunk_size; |
166 |
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int chunk_type; |
167 |
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168 |
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int i, j, ret; |
169 |
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170 |
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int color_packets; |
171 |
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int color_changes; |
172 |
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int color_shift; |
173 |
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unsigned char r, g, b; |
174 |
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175 |
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int lines; |
176 |
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int compressed_lines; |
177 |
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int starting_line; |
178 |
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int line_packets; |
179 |
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int y_ptr; |
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int byte_run; |
181 |
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int pixel_skip; |
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int pixel_countdown; |
183 |
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unsigned char *pixels; |
184 |
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unsigned int pixel_limit; |
185 |
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186 |
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bytestream2_init(&g2, buf, buf_size); |
187 |
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188 |
✗✓ |
501 |
if ((ret = ff_reget_buffer(avctx, s->frame, 0)) < 0) |
189 |
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return ret; |
190 |
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191 |
|
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pixels = s->frame->data[0]; |
192 |
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pixel_limit = s->avctx->height * s->frame->linesize[0]; |
193 |
✓✗✗✓
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if (buf_size < 16 || buf_size > INT_MAX - (3 * 256 + AV_INPUT_BUFFER_PADDING_SIZE)) |
194 |
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return AVERROR_INVALIDDATA; |
195 |
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frame_size = bytestream2_get_le32(&g2); |
196 |
✗✓ |
501 |
if (frame_size > buf_size) |
197 |
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frame_size = buf_size; |
198 |
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bytestream2_skip(&g2, 2); /* skip the magic number */ |
199 |
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num_chunks = bytestream2_get_le16(&g2); |
200 |
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bytestream2_skip(&g2, 8); /* skip padding */ |
201 |
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202 |
✗✓ |
501 |
if (frame_size < 16) |
203 |
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return AVERROR_INVALIDDATA; |
204 |
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205 |
|
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frame_size -= 16; |
206 |
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207 |
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/* iterate through the chunks */ |
208 |
✓✓✓✗
✓✗ |
1549 |
while ((frame_size >= 6) && (num_chunks > 0) && |
209 |
|
524 |
bytestream2_get_bytes_left(&g2) >= 4) { |
210 |
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int stream_ptr_after_chunk; |
211 |
|
524 |
chunk_size = bytestream2_get_le32(&g2); |
212 |
✗✓ |
524 |
if (chunk_size > frame_size) { |
213 |
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av_log(avctx, AV_LOG_WARNING, |
214 |
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"Invalid chunk_size = %u > frame_size = %u\n", chunk_size, frame_size); |
215 |
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chunk_size = frame_size; |
216 |
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} |
217 |
|
524 |
stream_ptr_after_chunk = bytestream2_tell(&g2) - 4 + chunk_size; |
218 |
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219 |
|
524 |
chunk_type = bytestream2_get_le16(&g2); |
220 |
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|
221 |
✓✓✓✗
✓✗✗✗
|
524 |
switch (chunk_type) { |
222 |
|
42 |
case FLI_256_COLOR: |
223 |
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case FLI_COLOR: |
224 |
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/* check special case: If this file is from the Magic Carpet |
225 |
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* game and uses 6-bit colors even though it reports 256-color |
226 |
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* chunks in a 0xAF12-type file (fli_type is set to 0xAF13 during |
227 |
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* initialization) */ |
228 |
✓✓✓✓
|
42 |
if ((chunk_type == FLI_256_COLOR) && (s->fli_type != FLC_MAGIC_CARPET_SYNTHETIC_TYPE_CODE)) |
229 |
|
1 |
color_shift = 0; |
230 |
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else |
231 |
|
41 |
color_shift = 2; |
232 |
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/* set up the palette */ |
233 |
|
42 |
color_packets = bytestream2_get_le16(&g2); |
234 |
|
42 |
palette_ptr = 0; |
235 |
✓✓ |
297 |
for (i = 0; i < color_packets; i++) { |
236 |
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/* first byte is how many colors to skip */ |
237 |
|
255 |
palette_ptr += bytestream2_get_byte(&g2); |
238 |
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|
239 |
|
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/* next byte indicates how many entries to change */ |
240 |
|
255 |
color_changes = bytestream2_get_byte(&g2); |
241 |
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|
242 |
|
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/* if there are 0 color changes, there are actually 256 */ |
243 |
✓✓ |
255 |
if (color_changes == 0) |
244 |
|
4 |
color_changes = 256; |
245 |
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|
246 |
✗✓ |
255 |
if (bytestream2_tell(&g2) + color_changes * 3 > stream_ptr_after_chunk) |
247 |
|
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break; |
248 |
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|
249 |
✓✓ |
10643 |
for (j = 0; j < color_changes; j++) { |
250 |
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unsigned int entry; |
251 |
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|
252 |
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/* wrap around, for good measure */ |
253 |
✗✓ |
10388 |
if ((unsigned)palette_ptr >= 256) |
254 |
|
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palette_ptr = 0; |
255 |
|
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|
256 |
|
10388 |
r = bytestream2_get_byte(&g2) << color_shift; |
257 |
|
10388 |
g = bytestream2_get_byte(&g2) << color_shift; |
258 |
|
10388 |
b = bytestream2_get_byte(&g2) << color_shift; |
259 |
|
10388 |
entry = 0xFFU << 24 | r << 16 | g << 8 | b; |
260 |
✓✓ |
10388 |
if (color_shift == 2) |
261 |
|
10132 |
entry |= entry >> 6 & 0x30303; |
262 |
✓✗ |
10388 |
if (s->palette[palette_ptr] != entry) |
263 |
|
10388 |
s->new_palette = 1; |
264 |
|
10388 |
s->palette[palette_ptr++] = entry; |
265 |
|
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} |
266 |
|
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} |
267 |
|
42 |
break; |
268 |
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|
269 |
|
67 |
case FLI_DELTA: |
270 |
|
67 |
y_ptr = 0; |
271 |
|
67 |
compressed_lines = bytestream2_get_le16(&g2); |
272 |
✓✓ |
8288 |
while (compressed_lines > 0) { |
273 |
✗✓ |
8221 |
if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk) |
274 |
|
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break; |
275 |
✗✓ |
8221 |
if (y_ptr > pixel_limit) |
276 |
|
|
return AVERROR_INVALIDDATA; |
277 |
|
8221 |
line_packets = sign_extend(bytestream2_get_le16(&g2), 16); |
278 |
✓✓ |
8221 |
if ((line_packets & 0xC000) == 0xC000) { |
279 |
|
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// line skip opcode |
280 |
|
108 |
line_packets = -line_packets; |
281 |
✗✓ |
108 |
if (line_packets > s->avctx->height) |
282 |
|
|
return AVERROR_INVALIDDATA; |
283 |
|
108 |
y_ptr += line_packets * s->frame->linesize[0]; |
284 |
✗✓ |
8113 |
} else if ((line_packets & 0xC000) == 0x4000) { |
285 |
|
|
av_log(avctx, AV_LOG_ERROR, "Undefined opcode (%x) in DELTA_FLI\n", line_packets); |
286 |
✗✓ |
8113 |
} else if ((line_packets & 0xC000) == 0x8000) { |
287 |
|
|
// "last byte" opcode |
288 |
|
|
pixel_ptr= y_ptr + s->frame->linesize[0] - 1; |
289 |
|
|
CHECK_PIXEL_PTR(0); |
290 |
|
|
pixels[pixel_ptr] = line_packets & 0xff; |
291 |
|
|
} else { |
292 |
|
8113 |
compressed_lines--; |
293 |
|
8113 |
pixel_ptr = y_ptr; |
294 |
✗✓ |
8113 |
CHECK_PIXEL_PTR(0); |
295 |
|
8113 |
pixel_countdown = s->avctx->width; |
296 |
✓✓ |
132721 |
for (i = 0; i < line_packets; i++) { |
297 |
✗✓ |
124608 |
if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk) |
298 |
|
|
break; |
299 |
|
|
/* account for the skip bytes */ |
300 |
|
124608 |
pixel_skip = bytestream2_get_byte(&g2); |
301 |
|
124608 |
pixel_ptr += pixel_skip; |
302 |
|
124608 |
pixel_countdown -= pixel_skip; |
303 |
|
124608 |
byte_run = sign_extend(bytestream2_get_byte(&g2), 8); |
304 |
✓✓ |
124608 |
if (byte_run < 0) { |
305 |
|
37508 |
byte_run = -byte_run; |
306 |
|
37508 |
palette_idx1 = bytestream2_get_byte(&g2); |
307 |
|
37508 |
palette_idx2 = bytestream2_get_byte(&g2); |
308 |
✗✓ |
37508 |
CHECK_PIXEL_PTR(byte_run * 2); |
309 |
✓✓ |
220003 |
for (j = 0; j < byte_run; j++, pixel_countdown -= 2) { |
310 |
|
182495 |
pixels[pixel_ptr++] = palette_idx1; |
311 |
|
182495 |
pixels[pixel_ptr++] = palette_idx2; |
312 |
|
|
} |
313 |
|
|
} else { |
314 |
✗✓ |
87100 |
CHECK_PIXEL_PTR(byte_run * 2); |
315 |
✗✓ |
87100 |
if (bytestream2_tell(&g2) + byte_run * 2 > stream_ptr_after_chunk) |
316 |
|
|
break; |
317 |
✓✓ |
906386 |
for (j = 0; j < byte_run * 2; j++, pixel_countdown--) { |
318 |
|
819286 |
pixels[pixel_ptr++] = bytestream2_get_byte(&g2); |
319 |
|
|
} |
320 |
|
|
} |
321 |
|
|
} |
322 |
|
|
|
323 |
|
8113 |
y_ptr += s->frame->linesize[0]; |
324 |
|
|
} |
325 |
|
|
} |
326 |
|
67 |
break; |
327 |
|
|
|
328 |
|
411 |
case FLI_LC: |
329 |
|
|
/* line compressed */ |
330 |
|
411 |
starting_line = bytestream2_get_le16(&g2); |
331 |
✗✓ |
411 |
if (starting_line >= s->avctx->height) |
332 |
|
|
return AVERROR_INVALIDDATA; |
333 |
|
411 |
y_ptr = 0; |
334 |
|
411 |
y_ptr += starting_line * s->frame->linesize[0]; |
335 |
|
|
|
336 |
|
411 |
compressed_lines = bytestream2_get_le16(&g2); |
337 |
✓✓ |
53677 |
while (compressed_lines > 0) { |
338 |
|
53266 |
pixel_ptr = y_ptr; |
339 |
✗✓ |
53266 |
CHECK_PIXEL_PTR(0); |
340 |
|
53266 |
pixel_countdown = s->avctx->width; |
341 |
✗✓ |
53266 |
if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk) |
342 |
|
|
break; |
343 |
|
53266 |
line_packets = bytestream2_get_byte(&g2); |
344 |
✓✓ |
53266 |
if (line_packets > 0) { |
345 |
✓✓ |
369126 |
for (i = 0; i < line_packets; i++) { |
346 |
|
|
/* account for the skip bytes */ |
347 |
✗✓ |
320826 |
if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk) |
348 |
|
|
break; |
349 |
|
320826 |
pixel_skip = bytestream2_get_byte(&g2); |
350 |
|
320826 |
pixel_ptr += pixel_skip; |
351 |
|
320826 |
pixel_countdown -= pixel_skip; |
352 |
|
320826 |
byte_run = sign_extend(bytestream2_get_byte(&g2),8); |
353 |
✓✓ |
320826 |
if (byte_run > 0) { |
354 |
✗✓ |
235604 |
CHECK_PIXEL_PTR(byte_run); |
355 |
✗✓ |
235604 |
if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk) |
356 |
|
|
break; |
357 |
✓✓ |
1600390 |
for (j = 0; j < byte_run; j++, pixel_countdown--) { |
358 |
|
1364786 |
pixels[pixel_ptr++] = bytestream2_get_byte(&g2); |
359 |
|
|
} |
360 |
✓✗ |
85222 |
} else if (byte_run < 0) { |
361 |
|
85222 |
byte_run = -byte_run; |
362 |
|
85222 |
palette_idx1 = bytestream2_get_byte(&g2); |
363 |
✗✓ |
85222 |
CHECK_PIXEL_PTR(byte_run); |
364 |
✓✓ |
625612 |
for (j = 0; j < byte_run; j++, pixel_countdown--) { |
365 |
|
540390 |
pixels[pixel_ptr++] = palette_idx1; |
366 |
|
|
} |
367 |
|
|
} |
368 |
|
|
} |
369 |
|
|
} |
370 |
|
|
|
371 |
|
53266 |
y_ptr += s->frame->linesize[0]; |
372 |
|
53266 |
compressed_lines--; |
373 |
|
|
} |
374 |
|
411 |
break; |
375 |
|
|
|
376 |
|
|
case FLI_BLACK: |
377 |
|
|
/* set the whole frame to color 0 (which is usually black) */ |
378 |
|
|
memset(pixels, 0, |
379 |
|
|
s->frame->linesize[0] * s->avctx->height); |
380 |
|
|
break; |
381 |
|
|
|
382 |
|
4 |
case FLI_BRUN: |
383 |
|
|
/* Byte run compression: This chunk type only occurs in the first |
384 |
|
|
* FLI frame and it will update the entire frame. */ |
385 |
|
4 |
y_ptr = 0; |
386 |
✓✓ |
1084 |
for (lines = 0; lines < s->avctx->height; lines++) { |
387 |
|
1080 |
pixel_ptr = y_ptr; |
388 |
|
|
/* disregard the line packets; instead, iterate through all |
389 |
|
|
* pixels on a row */ |
390 |
|
1080 |
bytestream2_skip(&g2, 1); |
391 |
|
1080 |
pixel_countdown = s->avctx->width; |
392 |
✓✓ |
23867 |
while (pixel_countdown > 0) { |
393 |
✗✓ |
22787 |
if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk) |
394 |
|
|
break; |
395 |
|
22787 |
byte_run = sign_extend(bytestream2_get_byte(&g2), 8); |
396 |
✗✓ |
22787 |
if (!byte_run) { |
397 |
|
|
av_log(avctx, AV_LOG_ERROR, "Invalid byte run value.\n"); |
398 |
|
|
return AVERROR_INVALIDDATA; |
399 |
|
|
} |
400 |
|
|
|
401 |
✓✓ |
22787 |
if (byte_run > 0) { |
402 |
|
14467 |
palette_idx1 = bytestream2_get_byte(&g2); |
403 |
✗✓ |
14467 |
CHECK_PIXEL_PTR(byte_run); |
404 |
✓✓ |
492515 |
for (j = 0; j < byte_run; j++) { |
405 |
|
478048 |
pixels[pixel_ptr++] = palette_idx1; |
406 |
|
478048 |
pixel_countdown--; |
407 |
✗✓ |
478048 |
if (pixel_countdown < 0) |
408 |
|
|
av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n", |
409 |
|
|
pixel_countdown, lines); |
410 |
|
|
} |
411 |
|
|
} else { /* copy bytes if byte_run < 0 */ |
412 |
|
8320 |
byte_run = -byte_run; |
413 |
✗✓ |
8320 |
CHECK_PIXEL_PTR(byte_run); |
414 |
✗✓ |
8320 |
if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk) |
415 |
|
|
break; |
416 |
✓✓ |
29472 |
for (j = 0; j < byte_run; j++) { |
417 |
|
21152 |
pixels[pixel_ptr++] = bytestream2_get_byte(&g2); |
418 |
|
21152 |
pixel_countdown--; |
419 |
✗✓ |
21152 |
if (pixel_countdown < 0) |
420 |
|
|
av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n", |
421 |
|
|
pixel_countdown, lines); |
422 |
|
|
} |
423 |
|
|
} |
424 |
|
|
} |
425 |
|
|
|
426 |
|
1080 |
y_ptr += s->frame->linesize[0]; |
427 |
|
|
} |
428 |
|
4 |
break; |
429 |
|
|
|
430 |
|
|
case FLI_COPY: |
431 |
|
|
/* copy the chunk (uncompressed frame) */ |
432 |
|
|
if (chunk_size - 6 != FFALIGN(s->avctx->width, 4) * s->avctx->height) { |
433 |
|
|
av_log(avctx, AV_LOG_ERROR, "In chunk FLI_COPY : source data (%d bytes) " \ |
434 |
|
|
"has incorrect size, skipping chunk\n", chunk_size - 6); |
435 |
|
|
bytestream2_skip(&g2, chunk_size - 6); |
436 |
|
|
} else { |
437 |
|
|
for (y_ptr = 0; y_ptr < s->frame->linesize[0] * s->avctx->height; |
438 |
|
|
y_ptr += s->frame->linesize[0]) { |
439 |
|
|
bytestream2_get_buffer(&g2, &pixels[y_ptr], |
440 |
|
|
s->avctx->width); |
441 |
|
|
if (s->avctx->width & 3) |
442 |
|
|
bytestream2_skip(&g2, 4 - (s->avctx->width & 3)); |
443 |
|
|
} |
444 |
|
|
} |
445 |
|
|
break; |
446 |
|
|
|
447 |
|
|
case FLI_MINI: |
448 |
|
|
/* some sort of a thumbnail? disregard this chunk... */ |
449 |
|
|
break; |
450 |
|
|
|
451 |
|
|
default: |
452 |
|
|
av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type); |
453 |
|
|
break; |
454 |
|
|
} |
455 |
|
|
|
456 |
✓✗ |
524 |
if (stream_ptr_after_chunk - bytestream2_tell(&g2) >= 0) { |
457 |
|
524 |
bytestream2_skip(&g2, stream_ptr_after_chunk - bytestream2_tell(&g2)); |
458 |
|
|
} else { |
459 |
|
|
av_log(avctx, AV_LOG_ERROR, "Chunk overread\n"); |
460 |
|
|
break; |
461 |
|
|
} |
462 |
|
|
|
463 |
|
524 |
frame_size -= chunk_size; |
464 |
|
524 |
num_chunks--; |
465 |
|
|
} |
466 |
|
|
|
467 |
|
|
/* by the end of the chunk, the stream ptr should equal the frame |
468 |
|
|
* size (minus 1 or 2, possibly); if it doesn't, issue a warning */ |
469 |
✗✓ |
501 |
if (bytestream2_get_bytes_left(&g2) > 2) |
470 |
|
|
av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \ |
471 |
|
|
"and final chunk ptr = %d\n", buf_size, |
472 |
|
|
buf_size - bytestream2_get_bytes_left(&g2)); |
473 |
|
|
|
474 |
|
|
/* make the palette available on the way out */ |
475 |
|
501 |
memcpy(s->frame->data[1], s->palette, AVPALETTE_SIZE); |
476 |
✓✓ |
501 |
if (s->new_palette) { |
477 |
|
42 |
s->frame->palette_has_changed = 1; |
478 |
|
42 |
s->new_palette = 0; |
479 |
|
|
} |
480 |
|
|
|
481 |
✗✓ |
501 |
if ((ret = av_frame_ref(data, s->frame)) < 0) |
482 |
|
|
return ret; |
483 |
|
|
|
484 |
|
501 |
*got_frame = 1; |
485 |
|
|
|
486 |
|
501 |
return buf_size; |
487 |
|
|
} |
488 |
|
|
|
489 |
|
|
static int flic_decode_frame_15_16BPP(AVCodecContext *avctx, |
490 |
|
|
void *data, int *got_frame, |
491 |
|
|
const uint8_t *buf, int buf_size) |
492 |
|
|
{ |
493 |
|
|
/* Note, the only difference between the 15Bpp and 16Bpp */ |
494 |
|
|
/* Format is the pixel format, the packets are processed the same. */ |
495 |
|
|
FlicDecodeContext *s = avctx->priv_data; |
496 |
|
|
|
497 |
|
|
GetByteContext g2; |
498 |
|
|
int pixel_ptr; |
499 |
|
|
unsigned char palette_idx1; |
500 |
|
|
|
501 |
|
|
unsigned int frame_size; |
502 |
|
|
int num_chunks; |
503 |
|
|
|
504 |
|
|
unsigned int chunk_size; |
505 |
|
|
int chunk_type; |
506 |
|
|
|
507 |
|
|
int i, j, ret; |
508 |
|
|
|
509 |
|
|
int lines; |
510 |
|
|
int compressed_lines; |
511 |
|
|
int line_packets; |
512 |
|
|
int y_ptr; |
513 |
|
|
int byte_run; |
514 |
|
|
int pixel_skip; |
515 |
|
|
int pixel_countdown; |
516 |
|
|
unsigned char *pixels; |
517 |
|
|
int pixel; |
518 |
|
|
unsigned int pixel_limit; |
519 |
|
|
|
520 |
|
|
bytestream2_init(&g2, buf, buf_size); |
521 |
|
|
|
522 |
|
|
if ((ret = ff_reget_buffer(avctx, s->frame, 0)) < 0) |
523 |
|
|
return ret; |
524 |
|
|
|
525 |
|
|
pixels = s->frame->data[0]; |
526 |
|
|
pixel_limit = s->avctx->height * s->frame->linesize[0]; |
527 |
|
|
|
528 |
|
|
frame_size = bytestream2_get_le32(&g2); |
529 |
|
|
bytestream2_skip(&g2, 2); /* skip the magic number */ |
530 |
|
|
num_chunks = bytestream2_get_le16(&g2); |
531 |
|
|
bytestream2_skip(&g2, 8); /* skip padding */ |
532 |
|
|
if (frame_size > buf_size) |
533 |
|
|
frame_size = buf_size; |
534 |
|
|
|
535 |
|
|
if (frame_size < 16) |
536 |
|
|
return AVERROR_INVALIDDATA; |
537 |
|
|
frame_size -= 16; |
538 |
|
|
|
539 |
|
|
/* iterate through the chunks */ |
540 |
|
|
while ((frame_size > 0) && (num_chunks > 0) && |
541 |
|
|
bytestream2_get_bytes_left(&g2) >= 4) { |
542 |
|
|
int stream_ptr_after_chunk; |
543 |
|
|
chunk_size = bytestream2_get_le32(&g2); |
544 |
|
|
if (chunk_size > frame_size) { |
545 |
|
|
av_log(avctx, AV_LOG_WARNING, |
546 |
|
|
"Invalid chunk_size = %u > frame_size = %u\n", chunk_size, frame_size); |
547 |
|
|
chunk_size = frame_size; |
548 |
|
|
} |
549 |
|
|
stream_ptr_after_chunk = bytestream2_tell(&g2) - 4 + chunk_size; |
550 |
|
|
|
551 |
|
|
chunk_type = bytestream2_get_le16(&g2); |
552 |
|
|
|
553 |
|
|
|
554 |
|
|
switch (chunk_type) { |
555 |
|
|
case FLI_256_COLOR: |
556 |
|
|
case FLI_COLOR: |
557 |
|
|
/* For some reason, it seems that non-palettized flics do |
558 |
|
|
* include one of these chunks in their first frame. |
559 |
|
|
* Why I do not know, it seems rather extraneous. */ |
560 |
|
|
ff_dlog(avctx, |
561 |
|
|
"Unexpected Palette chunk %d in non-palettized FLC\n", |
562 |
|
|
chunk_type); |
563 |
|
|
bytestream2_skip(&g2, chunk_size - 6); |
564 |
|
|
break; |
565 |
|
|
|
566 |
|
|
case FLI_DELTA: |
567 |
|
|
case FLI_DTA_LC: |
568 |
|
|
y_ptr = 0; |
569 |
|
|
compressed_lines = bytestream2_get_le16(&g2); |
570 |
|
|
while (compressed_lines > 0) { |
571 |
|
|
if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk) |
572 |
|
|
break; |
573 |
|
|
if (y_ptr > pixel_limit) |
574 |
|
|
return AVERROR_INVALIDDATA; |
575 |
|
|
line_packets = sign_extend(bytestream2_get_le16(&g2), 16); |
576 |
|
|
if (line_packets < 0) { |
577 |
|
|
line_packets = -line_packets; |
578 |
|
|
if (line_packets > s->avctx->height) |
579 |
|
|
return AVERROR_INVALIDDATA; |
580 |
|
|
y_ptr += line_packets * s->frame->linesize[0]; |
581 |
|
|
} else { |
582 |
|
|
compressed_lines--; |
583 |
|
|
pixel_ptr = y_ptr; |
584 |
|
|
CHECK_PIXEL_PTR(0); |
585 |
|
|
pixel_countdown = s->avctx->width; |
586 |
|
|
for (i = 0; i < line_packets; i++) { |
587 |
|
|
/* account for the skip bytes */ |
588 |
|
|
if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk) |
589 |
|
|
break; |
590 |
|
|
pixel_skip = bytestream2_get_byte(&g2); |
591 |
|
|
pixel_ptr += (pixel_skip*2); /* Pixel is 2 bytes wide */ |
592 |
|
|
pixel_countdown -= pixel_skip; |
593 |
|
|
byte_run = sign_extend(bytestream2_get_byte(&g2), 8); |
594 |
|
|
if (byte_run < 0) { |
595 |
|
|
byte_run = -byte_run; |
596 |
|
|
pixel = bytestream2_get_le16(&g2); |
597 |
|
|
CHECK_PIXEL_PTR(2 * byte_run); |
598 |
|
|
for (j = 0; j < byte_run; j++, pixel_countdown -= 2) { |
599 |
|
|
*((signed short*)(&pixels[pixel_ptr])) = pixel; |
600 |
|
|
pixel_ptr += 2; |
601 |
|
|
} |
602 |
|
|
} else { |
603 |
|
|
if (bytestream2_tell(&g2) + 2*byte_run > stream_ptr_after_chunk) |
604 |
|
|
break; |
605 |
|
|
CHECK_PIXEL_PTR(2 * byte_run); |
606 |
|
|
for (j = 0; j < byte_run; j++, pixel_countdown--) { |
607 |
|
|
*((signed short*)(&pixels[pixel_ptr])) = bytestream2_get_le16(&g2); |
608 |
|
|
pixel_ptr += 2; |
609 |
|
|
} |
610 |
|
|
} |
611 |
|
|
} |
612 |
|
|
|
613 |
|
|
y_ptr += s->frame->linesize[0]; |
614 |
|
|
} |
615 |
|
|
} |
616 |
|
|
break; |
617 |
|
|
|
618 |
|
|
case FLI_LC: |
619 |
|
|
av_log(avctx, AV_LOG_ERROR, "Unexpected FLI_LC chunk in non-palettized FLC\n"); |
620 |
|
|
bytestream2_skip(&g2, chunk_size - 6); |
621 |
|
|
break; |
622 |
|
|
|
623 |
|
|
case FLI_BLACK: |
624 |
|
|
/* set the whole frame to 0x0000 which is black in both 15Bpp and 16Bpp modes. */ |
625 |
|
|
memset(pixels, 0x0000, |
626 |
|
|
s->frame->linesize[0] * s->avctx->height); |
627 |
|
|
break; |
628 |
|
|
|
629 |
|
|
case FLI_BRUN: |
630 |
|
|
y_ptr = 0; |
631 |
|
|
for (lines = 0; lines < s->avctx->height; lines++) { |
632 |
|
|
pixel_ptr = y_ptr; |
633 |
|
|
/* disregard the line packets; instead, iterate through all |
634 |
|
|
* pixels on a row */ |
635 |
|
|
bytestream2_skip(&g2, 1); |
636 |
|
|
pixel_countdown = (s->avctx->width * 2); |
637 |
|
|
|
638 |
|
|
while (pixel_countdown > 0) { |
639 |
|
|
if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk) |
640 |
|
|
break; |
641 |
|
|
byte_run = sign_extend(bytestream2_get_byte(&g2), 8); |
642 |
|
|
if (byte_run > 0) { |
643 |
|
|
palette_idx1 = bytestream2_get_byte(&g2); |
644 |
|
|
CHECK_PIXEL_PTR(byte_run); |
645 |
|
|
for (j = 0; j < byte_run; j++) { |
646 |
|
|
pixels[pixel_ptr++] = palette_idx1; |
647 |
|
|
pixel_countdown--; |
648 |
|
|
if (pixel_countdown < 0) |
649 |
|
|
av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) (linea%d)\n", |
650 |
|
|
pixel_countdown, lines); |
651 |
|
|
} |
652 |
|
|
} else { /* copy bytes if byte_run < 0 */ |
653 |
|
|
byte_run = -byte_run; |
654 |
|
|
if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk) |
655 |
|
|
break; |
656 |
|
|
CHECK_PIXEL_PTR(byte_run); |
657 |
|
|
for (j = 0; j < byte_run; j++) { |
658 |
|
|
palette_idx1 = bytestream2_get_byte(&g2); |
659 |
|
|
pixels[pixel_ptr++] = palette_idx1; |
660 |
|
|
pixel_countdown--; |
661 |
|
|
if (pixel_countdown < 0) |
662 |
|
|
av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n", |
663 |
|
|
pixel_countdown, lines); |
664 |
|
|
} |
665 |
|
|
} |
666 |
|
|
} |
667 |
|
|
|
668 |
|
|
/* Now FLX is strange, in that it is "byte" as opposed to "pixel" run length compressed. |
669 |
|
|
* This does not give us any good opportunity to perform word endian conversion |
670 |
|
|
* during decompression. So if it is required (i.e., this is not a LE target, we do |
671 |
|
|
* a second pass over the line here, swapping the bytes. |
672 |
|
|
*/ |
673 |
|
|
#if HAVE_BIGENDIAN |
674 |
|
|
pixel_ptr = y_ptr; |
675 |
|
|
pixel_countdown = s->avctx->width; |
676 |
|
|
while (pixel_countdown > 0) { |
677 |
|
|
*((signed short*)(&pixels[pixel_ptr])) = AV_RL16(&buf[pixel_ptr]); |
678 |
|
|
pixel_ptr += 2; |
679 |
|
|
} |
680 |
|
|
#endif |
681 |
|
|
y_ptr += s->frame->linesize[0]; |
682 |
|
|
} |
683 |
|
|
break; |
684 |
|
|
|
685 |
|
|
case FLI_DTA_BRUN: |
686 |
|
|
y_ptr = 0; |
687 |
|
|
for (lines = 0; lines < s->avctx->height; lines++) { |
688 |
|
|
pixel_ptr = y_ptr; |
689 |
|
|
/* disregard the line packets; instead, iterate through all |
690 |
|
|
* pixels on a row */ |
691 |
|
|
bytestream2_skip(&g2, 1); |
692 |
|
|
pixel_countdown = s->avctx->width; /* Width is in pixels, not bytes */ |
693 |
|
|
|
694 |
|
|
while (pixel_countdown > 0) { |
695 |
|
|
if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk) |
696 |
|
|
break; |
697 |
|
|
byte_run = sign_extend(bytestream2_get_byte(&g2), 8); |
698 |
|
|
if (byte_run > 0) { |
699 |
|
|
pixel = bytestream2_get_le16(&g2); |
700 |
|
|
CHECK_PIXEL_PTR(2 * byte_run); |
701 |
|
|
for (j = 0; j < byte_run; j++) { |
702 |
|
|
*((signed short*)(&pixels[pixel_ptr])) = pixel; |
703 |
|
|
pixel_ptr += 2; |
704 |
|
|
pixel_countdown--; |
705 |
|
|
if (pixel_countdown < 0) |
706 |
|
|
av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n", |
707 |
|
|
pixel_countdown); |
708 |
|
|
} |
709 |
|
|
} else { /* copy pixels if byte_run < 0 */ |
710 |
|
|
byte_run = -byte_run; |
711 |
|
|
if (bytestream2_tell(&g2) + 2 * byte_run > stream_ptr_after_chunk) |
712 |
|
|
break; |
713 |
|
|
CHECK_PIXEL_PTR(2 * byte_run); |
714 |
|
|
for (j = 0; j < byte_run; j++) { |
715 |
|
|
*((signed short*)(&pixels[pixel_ptr])) = bytestream2_get_le16(&g2); |
716 |
|
|
pixel_ptr += 2; |
717 |
|
|
pixel_countdown--; |
718 |
|
|
if (pixel_countdown < 0) |
719 |
|
|
av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n", |
720 |
|
|
pixel_countdown); |
721 |
|
|
} |
722 |
|
|
} |
723 |
|
|
} |
724 |
|
|
|
725 |
|
|
y_ptr += s->frame->linesize[0]; |
726 |
|
|
} |
727 |
|
|
break; |
728 |
|
|
|
729 |
|
|
case FLI_COPY: |
730 |
|
|
case FLI_DTA_COPY: |
731 |
|
|
/* copy the chunk (uncompressed frame) */ |
732 |
|
|
if (chunk_size - 6 > (unsigned int)(FFALIGN(s->avctx->width, 2) * s->avctx->height)*2) { |
733 |
|
|
av_log(avctx, AV_LOG_ERROR, "In chunk FLI_COPY : source data (%d bytes) " \ |
734 |
|
|
"bigger than image, skipping chunk\n", chunk_size - 6); |
735 |
|
|
bytestream2_skip(&g2, chunk_size - 6); |
736 |
|
|
} else { |
737 |
|
|
|
738 |
|
|
for (y_ptr = 0; y_ptr < s->frame->linesize[0] * s->avctx->height; |
739 |
|
|
y_ptr += s->frame->linesize[0]) { |
740 |
|
|
|
741 |
|
|
pixel_countdown = s->avctx->width; |
742 |
|
|
pixel_ptr = 0; |
743 |
|
|
while (pixel_countdown > 0) { |
744 |
|
|
*((signed short*)(&pixels[y_ptr + pixel_ptr])) = bytestream2_get_le16(&g2); |
745 |
|
|
pixel_ptr += 2; |
746 |
|
|
pixel_countdown--; |
747 |
|
|
} |
748 |
|
|
if (s->avctx->width & 1) |
749 |
|
|
bytestream2_skip(&g2, 2); |
750 |
|
|
} |
751 |
|
|
} |
752 |
|
|
break; |
753 |
|
|
|
754 |
|
|
case FLI_MINI: |
755 |
|
|
/* some sort of a thumbnail? disregard this chunk... */ |
756 |
|
|
bytestream2_skip(&g2, chunk_size - 6); |
757 |
|
|
break; |
758 |
|
|
|
759 |
|
|
default: |
760 |
|
|
av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type); |
761 |
|
|
break; |
762 |
|
|
} |
763 |
|
|
|
764 |
|
|
if (stream_ptr_after_chunk - bytestream2_tell(&g2) >= 0) { |
765 |
|
|
bytestream2_skip(&g2, stream_ptr_after_chunk - bytestream2_tell(&g2)); |
766 |
|
|
} else { |
767 |
|
|
av_log(avctx, AV_LOG_ERROR, "Chunk overread\n"); |
768 |
|
|
break; |
769 |
|
|
} |
770 |
|
|
|
771 |
|
|
frame_size -= chunk_size; |
772 |
|
|
num_chunks--; |
773 |
|
|
} |
774 |
|
|
|
775 |
|
|
/* by the end of the chunk, the stream ptr should equal the frame |
776 |
|
|
* size (minus 1, possibly); if it doesn't, issue a warning */ |
777 |
|
|
if ((bytestream2_get_bytes_left(&g2) != 0) && (bytestream2_get_bytes_left(&g2) != 1)) |
778 |
|
|
av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \ |
779 |
|
|
"and final chunk ptr = %d\n", buf_size, bytestream2_tell(&g2)); |
780 |
|
|
|
781 |
|
|
if ((ret = av_frame_ref(data, s->frame)) < 0) |
782 |
|
|
return ret; |
783 |
|
|
|
784 |
|
|
*got_frame = 1; |
785 |
|
|
|
786 |
|
|
return buf_size; |
787 |
|
|
} |
788 |
|
|
|
789 |
|
|
static int flic_decode_frame_24BPP(AVCodecContext *avctx, |
790 |
|
|
void *data, int *got_frame, |
791 |
|
|
const uint8_t *buf, int buf_size) |
792 |
|
|
{ |
793 |
|
|
FlicDecodeContext *s = avctx->priv_data; |
794 |
|
|
|
795 |
|
|
GetByteContext g2; |
796 |
|
|
int pixel_ptr; |
797 |
|
|
unsigned char palette_idx1; |
798 |
|
|
|
799 |
|
|
unsigned int frame_size; |
800 |
|
|
int num_chunks; |
801 |
|
|
|
802 |
|
|
unsigned int chunk_size; |
803 |
|
|
int chunk_type; |
804 |
|
|
|
805 |
|
|
int i, j, ret; |
806 |
|
|
|
807 |
|
|
int lines; |
808 |
|
|
int compressed_lines; |
809 |
|
|
int line_packets; |
810 |
|
|
int y_ptr; |
811 |
|
|
int byte_run; |
812 |
|
|
int pixel_skip; |
813 |
|
|
int pixel_countdown; |
814 |
|
|
unsigned char *pixels; |
815 |
|
|
int pixel; |
816 |
|
|
unsigned int pixel_limit; |
817 |
|
|
|
818 |
|
|
bytestream2_init(&g2, buf, buf_size); |
819 |
|
|
|
820 |
|
|
if ((ret = ff_reget_buffer(avctx, s->frame, 0)) < 0) |
821 |
|
|
return ret; |
822 |
|
|
|
823 |
|
|
pixels = s->frame->data[0]; |
824 |
|
|
pixel_limit = s->avctx->height * s->frame->linesize[0]; |
825 |
|
|
|
826 |
|
|
frame_size = bytestream2_get_le32(&g2); |
827 |
|
|
bytestream2_skip(&g2, 2); /* skip the magic number */ |
828 |
|
|
num_chunks = bytestream2_get_le16(&g2); |
829 |
|
|
bytestream2_skip(&g2, 8); /* skip padding */ |
830 |
|
|
if (frame_size > buf_size) |
831 |
|
|
frame_size = buf_size; |
832 |
|
|
|
833 |
|
|
if (frame_size < 16) |
834 |
|
|
return AVERROR_INVALIDDATA; |
835 |
|
|
frame_size -= 16; |
836 |
|
|
|
837 |
|
|
/* iterate through the chunks */ |
838 |
|
|
while ((frame_size > 0) && (num_chunks > 0) && |
839 |
|
|
bytestream2_get_bytes_left(&g2) >= 4) { |
840 |
|
|
int stream_ptr_after_chunk; |
841 |
|
|
chunk_size = bytestream2_get_le32(&g2); |
842 |
|
|
if (chunk_size > frame_size) { |
843 |
|
|
av_log(avctx, AV_LOG_WARNING, |
844 |
|
|
"Invalid chunk_size = %u > frame_size = %u\n", chunk_size, frame_size); |
845 |
|
|
chunk_size = frame_size; |
846 |
|
|
} |
847 |
|
|
stream_ptr_after_chunk = bytestream2_tell(&g2) - 4 + chunk_size; |
848 |
|
|
|
849 |
|
|
chunk_type = bytestream2_get_le16(&g2); |
850 |
|
|
|
851 |
|
|
|
852 |
|
|
switch (chunk_type) { |
853 |
|
|
case FLI_256_COLOR: |
854 |
|
|
case FLI_COLOR: |
855 |
|
|
/* For some reason, it seems that non-palettized flics do |
856 |
|
|
* include one of these chunks in their first frame. |
857 |
|
|
* Why I do not know, it seems rather extraneous. */ |
858 |
|
|
ff_dlog(avctx, |
859 |
|
|
"Unexpected Palette chunk %d in non-palettized FLC\n", |
860 |
|
|
chunk_type); |
861 |
|
|
bytestream2_skip(&g2, chunk_size - 6); |
862 |
|
|
break; |
863 |
|
|
|
864 |
|
|
case FLI_DELTA: |
865 |
|
|
case FLI_DTA_LC: |
866 |
|
|
y_ptr = 0; |
867 |
|
|
compressed_lines = bytestream2_get_le16(&g2); |
868 |
|
|
while (compressed_lines > 0) { |
869 |
|
|
if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk) |
870 |
|
|
break; |
871 |
|
|
if (y_ptr > pixel_limit) |
872 |
|
|
return AVERROR_INVALIDDATA; |
873 |
|
|
line_packets = sign_extend(bytestream2_get_le16(&g2), 16); |
874 |
|
|
if (line_packets < 0) { |
875 |
|
|
line_packets = -line_packets; |
876 |
|
|
if (line_packets > s->avctx->height) |
877 |
|
|
return AVERROR_INVALIDDATA; |
878 |
|
|
y_ptr += line_packets * s->frame->linesize[0]; |
879 |
|
|
} else { |
880 |
|
|
compressed_lines--; |
881 |
|
|
pixel_ptr = y_ptr; |
882 |
|
|
CHECK_PIXEL_PTR(0); |
883 |
|
|
pixel_countdown = s->avctx->width; |
884 |
|
|
for (i = 0; i < line_packets; i++) { |
885 |
|
|
/* account for the skip bytes */ |
886 |
|
|
if (bytestream2_tell(&g2) + 2 > stream_ptr_after_chunk) |
887 |
|
|
break; |
888 |
|
|
pixel_skip = bytestream2_get_byte(&g2); |
889 |
|
|
pixel_ptr += (pixel_skip*3); /* Pixel is 3 bytes wide */ |
890 |
|
|
pixel_countdown -= pixel_skip; |
891 |
|
|
byte_run = sign_extend(bytestream2_get_byte(&g2), 8); |
892 |
|
|
if (byte_run < 0) { |
893 |
|
|
byte_run = -byte_run; |
894 |
|
|
pixel = bytestream2_get_le24(&g2); |
895 |
|
|
CHECK_PIXEL_PTR(3 * byte_run); |
896 |
|
|
for (j = 0; j < byte_run; j++, pixel_countdown -= 1) { |
897 |
|
|
AV_WL24(&pixels[pixel_ptr], pixel); |
898 |
|
|
pixel_ptr += 3; |
899 |
|
|
} |
900 |
|
|
} else { |
901 |
|
|
if (bytestream2_tell(&g2) + 2*byte_run > stream_ptr_after_chunk) |
902 |
|
|
break; |
903 |
|
|
CHECK_PIXEL_PTR(3 * byte_run); |
904 |
|
|
for (j = 0; j < byte_run; j++, pixel_countdown--) { |
905 |
|
|
pixel = bytestream2_get_le24(&g2); |
906 |
|
|
AV_WL24(&pixels[pixel_ptr], pixel); |
907 |
|
|
pixel_ptr += 3; |
908 |
|
|
} |
909 |
|
|
} |
910 |
|
|
} |
911 |
|
|
|
912 |
|
|
y_ptr += s->frame->linesize[0]; |
913 |
|
|
} |
914 |
|
|
} |
915 |
|
|
break; |
916 |
|
|
|
917 |
|
|
case FLI_LC: |
918 |
|
|
av_log(avctx, AV_LOG_ERROR, "Unexpected FLI_LC chunk in non-palettized FLC\n"); |
919 |
|
|
bytestream2_skip(&g2, chunk_size - 6); |
920 |
|
|
break; |
921 |
|
|
|
922 |
|
|
case FLI_BLACK: |
923 |
|
|
/* set the whole frame to 0x00 which is black for 24 bit mode. */ |
924 |
|
|
memset(pixels, 0x00, |
925 |
|
|
s->frame->linesize[0] * s->avctx->height); |
926 |
|
|
break; |
927 |
|
|
|
928 |
|
|
case FLI_BRUN: |
929 |
|
|
y_ptr = 0; |
930 |
|
|
for (lines = 0; lines < s->avctx->height; lines++) { |
931 |
|
|
pixel_ptr = y_ptr; |
932 |
|
|
/* disregard the line packets; instead, iterate through all |
933 |
|
|
* pixels on a row */ |
934 |
|
|
bytestream2_skip(&g2, 1); |
935 |
|
|
pixel_countdown = (s->avctx->width * 3); |
936 |
|
|
|
937 |
|
|
while (pixel_countdown > 0) { |
938 |
|
|
if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk) |
939 |
|
|
break; |
940 |
|
|
byte_run = sign_extend(bytestream2_get_byte(&g2), 8); |
941 |
|
|
if (byte_run > 0) { |
942 |
|
|
palette_idx1 = bytestream2_get_byte(&g2); |
943 |
|
|
CHECK_PIXEL_PTR(byte_run); |
944 |
|
|
for (j = 0; j < byte_run; j++) { |
945 |
|
|
pixels[pixel_ptr++] = palette_idx1; |
946 |
|
|
pixel_countdown--; |
947 |
|
|
if (pixel_countdown < 0) |
948 |
|
|
av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) (linea%d)\n", |
949 |
|
|
pixel_countdown, lines); |
950 |
|
|
} |
951 |
|
|
} else { /* copy bytes if byte_run < 0 */ |
952 |
|
|
byte_run = -byte_run; |
953 |
|
|
if (bytestream2_tell(&g2) + byte_run > stream_ptr_after_chunk) |
954 |
|
|
break; |
955 |
|
|
CHECK_PIXEL_PTR(byte_run); |
956 |
|
|
for (j = 0; j < byte_run; j++) { |
957 |
|
|
palette_idx1 = bytestream2_get_byte(&g2); |
958 |
|
|
pixels[pixel_ptr++] = palette_idx1; |
959 |
|
|
pixel_countdown--; |
960 |
|
|
if (pixel_countdown < 0) |
961 |
|
|
av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d) at line %d\n", |
962 |
|
|
pixel_countdown, lines); |
963 |
|
|
} |
964 |
|
|
} |
965 |
|
|
} |
966 |
|
|
|
967 |
|
|
y_ptr += s->frame->linesize[0]; |
968 |
|
|
} |
969 |
|
|
break; |
970 |
|
|
|
971 |
|
|
case FLI_DTA_BRUN: |
972 |
|
|
y_ptr = 0; |
973 |
|
|
for (lines = 0; lines < s->avctx->height; lines++) { |
974 |
|
|
pixel_ptr = y_ptr; |
975 |
|
|
/* disregard the line packets; instead, iterate through all |
976 |
|
|
* pixels on a row */ |
977 |
|
|
bytestream2_skip(&g2, 1); |
978 |
|
|
pixel_countdown = s->avctx->width; /* Width is in pixels, not bytes */ |
979 |
|
|
|
980 |
|
|
while (pixel_countdown > 0) { |
981 |
|
|
if (bytestream2_tell(&g2) + 1 > stream_ptr_after_chunk) |
982 |
|
|
break; |
983 |
|
|
byte_run = sign_extend(bytestream2_get_byte(&g2), 8); |
984 |
|
|
if (byte_run > 0) { |
985 |
|
|
pixel = bytestream2_get_le24(&g2); |
986 |
|
|
CHECK_PIXEL_PTR(3 * byte_run); |
987 |
|
|
for (j = 0; j < byte_run; j++) { |
988 |
|
|
AV_WL24(pixels + pixel_ptr, pixel); |
989 |
|
|
pixel_ptr += 3; |
990 |
|
|
pixel_countdown--; |
991 |
|
|
if (pixel_countdown < 0) |
992 |
|
|
av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n", |
993 |
|
|
pixel_countdown); |
994 |
|
|
} |
995 |
|
|
} else { /* copy pixels if byte_run < 0 */ |
996 |
|
|
byte_run = -byte_run; |
997 |
|
|
if (bytestream2_tell(&g2) + 3 * byte_run > stream_ptr_after_chunk) |
998 |
|
|
break; |
999 |
|
|
CHECK_PIXEL_PTR(3 * byte_run); |
1000 |
|
|
for (j = 0; j < byte_run; j++) { |
1001 |
|
|
pixel = bytestream2_get_le24(&g2); |
1002 |
|
|
AV_WL24(pixels + pixel_ptr, pixel); |
1003 |
|
|
pixel_ptr += 3; |
1004 |
|
|
pixel_countdown--; |
1005 |
|
|
if (pixel_countdown < 0) |
1006 |
|
|
av_log(avctx, AV_LOG_ERROR, "pixel_countdown < 0 (%d)\n", |
1007 |
|
|
pixel_countdown); |
1008 |
|
|
} |
1009 |
|
|
} |
1010 |
|
|
} |
1011 |
|
|
|
1012 |
|
|
y_ptr += s->frame->linesize[0]; |
1013 |
|
|
} |
1014 |
|
|
break; |
1015 |
|
|
|
1016 |
|
|
case FLI_COPY: |
1017 |
|
|
case FLI_DTA_COPY: |
1018 |
|
|
/* copy the chunk (uncompressed frame) */ |
1019 |
|
|
if (chunk_size - 6 > (unsigned int)(FFALIGN(s->avctx->width, 2) * s->avctx->height)*3) { |
1020 |
|
|
av_log(avctx, AV_LOG_ERROR, "In chunk FLI_COPY : source data (%d bytes) " \ |
1021 |
|
|
"bigger than image, skipping chunk\n", chunk_size - 6); |
1022 |
|
|
bytestream2_skip(&g2, chunk_size - 6); |
1023 |
|
|
} else { |
1024 |
|
|
for (y_ptr = 0; y_ptr < s->frame->linesize[0] * s->avctx->height; |
1025 |
|
|
y_ptr += s->frame->linesize[0]) { |
1026 |
|
|
|
1027 |
|
|
bytestream2_get_buffer(&g2, pixels + y_ptr, 3*s->avctx->width); |
1028 |
|
|
if (s->avctx->width & 1) |
1029 |
|
|
bytestream2_skip(&g2, 3); |
1030 |
|
|
} |
1031 |
|
|
} |
1032 |
|
|
break; |
1033 |
|
|
|
1034 |
|
|
case FLI_MINI: |
1035 |
|
|
/* some sort of a thumbnail? disregard this chunk... */ |
1036 |
|
|
bytestream2_skip(&g2, chunk_size - 6); |
1037 |
|
|
break; |
1038 |
|
|
|
1039 |
|
|
default: |
1040 |
|
|
av_log(avctx, AV_LOG_ERROR, "Unrecognized chunk type: %d\n", chunk_type); |
1041 |
|
|
break; |
1042 |
|
|
} |
1043 |
|
|
|
1044 |
|
|
if (stream_ptr_after_chunk - bytestream2_tell(&g2) >= 0) { |
1045 |
|
|
bytestream2_skip(&g2, stream_ptr_after_chunk - bytestream2_tell(&g2)); |
1046 |
|
|
} else { |
1047 |
|
|
av_log(avctx, AV_LOG_ERROR, "Chunk overread\n"); |
1048 |
|
|
break; |
1049 |
|
|
} |
1050 |
|
|
|
1051 |
|
|
frame_size -= chunk_size; |
1052 |
|
|
num_chunks--; |
1053 |
|
|
} |
1054 |
|
|
|
1055 |
|
|
/* by the end of the chunk, the stream ptr should equal the frame |
1056 |
|
|
* size (minus 1, possibly); if it doesn't, issue a warning */ |
1057 |
|
|
if ((bytestream2_get_bytes_left(&g2) != 0) && (bytestream2_get_bytes_left(&g2) != 1)) |
1058 |
|
|
av_log(avctx, AV_LOG_ERROR, "Processed FLI chunk where chunk size = %d " \ |
1059 |
|
|
"and final chunk ptr = %d\n", buf_size, bytestream2_tell(&g2)); |
1060 |
|
|
|
1061 |
|
|
if ((ret = av_frame_ref(data, s->frame)) < 0) |
1062 |
|
|
return ret; |
1063 |
|
|
|
1064 |
|
|
*got_frame = 1; |
1065 |
|
|
|
1066 |
|
|
return buf_size; |
1067 |
|
|
} |
1068 |
|
|
|
1069 |
|
501 |
static int flic_decode_frame(AVCodecContext *avctx, |
1070 |
|
|
void *data, int *got_frame, |
1071 |
|
|
AVPacket *avpkt) |
1072 |
|
|
{ |
1073 |
|
501 |
const uint8_t *buf = avpkt->data; |
1074 |
|
501 |
int buf_size = avpkt->size; |
1075 |
✓✗ |
501 |
if (avctx->pix_fmt == AV_PIX_FMT_PAL8) { |
1076 |
|
501 |
return flic_decode_frame_8BPP(avctx, data, got_frame, |
1077 |
|
|
buf, buf_size); |
1078 |
|
|
} else if ((avctx->pix_fmt == AV_PIX_FMT_RGB555) || |
1079 |
|
|
(avctx->pix_fmt == AV_PIX_FMT_RGB565)) { |
1080 |
|
|
return flic_decode_frame_15_16BPP(avctx, data, got_frame, |
1081 |
|
|
buf, buf_size); |
1082 |
|
|
} else if (avctx->pix_fmt == AV_PIX_FMT_BGR24) { |
1083 |
|
|
return flic_decode_frame_24BPP(avctx, data, got_frame, |
1084 |
|
|
buf, buf_size); |
1085 |
|
|
} |
1086 |
|
|
|
1087 |
|
|
/* Should not get here, ever as the pix_fmt is processed */ |
1088 |
|
|
/* in flic_decode_init and the above if should deal with */ |
1089 |
|
|
/* the finite set of possibilities allowable by here. */ |
1090 |
|
|
/* But in case we do, just error out. */ |
1091 |
|
|
av_log(avctx, AV_LOG_ERROR, "Unknown FLC format, my science cannot explain how this happened.\n"); |
1092 |
|
|
return AVERROR_BUG; |
1093 |
|
|
} |
1094 |
|
|
|
1095 |
|
|
|
1096 |
|
8 |
static av_cold int flic_decode_end(AVCodecContext *avctx) |
1097 |
|
|
{ |
1098 |
|
8 |
FlicDecodeContext *s = avctx->priv_data; |
1099 |
|
|
|
1100 |
|
8 |
av_frame_free(&s->frame); |
1101 |
|
|
|
1102 |
|
8 |
return 0; |
1103 |
|
|
} |
1104 |
|
|
|
1105 |
|
|
AVCodec ff_flic_decoder = { |
1106 |
|
|
.name = "flic", |
1107 |
|
|
.long_name = NULL_IF_CONFIG_SMALL("Autodesk Animator Flic video"), |
1108 |
|
|
.type = AVMEDIA_TYPE_VIDEO, |
1109 |
|
|
.id = AV_CODEC_ID_FLIC, |
1110 |
|
|
.priv_data_size = sizeof(FlicDecodeContext), |
1111 |
|
|
.init = flic_decode_init, |
1112 |
|
|
.close = flic_decode_end, |
1113 |
|
|
.decode = flic_decode_frame, |
1114 |
|
|
.capabilities = AV_CODEC_CAP_DR1, |
1115 |
|
|
}; |