Directory: | ../../../ffmpeg/ |
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File: | src/libavcodec/vqavideo.c |
Date: | 2022-07-05 19:52:29 |
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Lines: | 198 | 400 | 49.5% |
Branches: | 100 | 237 | 42.2% |
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1 | /* | ||
2 | * Westwood Studios VQA Video Decoder | ||
3 | * Copyright (c) 2003 Mike Melanson <melanson@pcisys.net> | ||
4 | * Copyright (c) 2021 Pekka Väänänen <pekka.vaananen@iki.fi> | ||
5 | * | ||
6 | * This file is part of FFmpeg. | ||
7 | * | ||
8 | * FFmpeg is free software; you can redistribute it and/or | ||
9 | * modify it under the terms of the GNU Lesser General Public | ||
10 | * License as published by the Free Software Foundation; either | ||
11 | * version 2.1 of the License, or (at your option) any later version. | ||
12 | * | ||
13 | * FFmpeg is distributed in the hope that it will be useful, | ||
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
16 | * Lesser General Public License for more details. | ||
17 | * | ||
18 | * You should have received a copy of the GNU Lesser General Public | ||
19 | * License along with FFmpeg; if not, write to the Free Software | ||
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
21 | */ | ||
22 | |||
23 | /** | ||
24 | * @file | ||
25 | * VQA Video Decoder | ||
26 | * @author Mike Melanson (melanson@pcisys.net) | ||
27 | * @see http://wiki.multimedia.cx/index.php?title=VQA | ||
28 | * | ||
29 | * The VQA video decoder outputs PAL8 or RGB555 colorspace data, depending | ||
30 | * on the type of data in the file. | ||
31 | * | ||
32 | * This decoder needs the 42-byte VQHD header from the beginning | ||
33 | * of the VQA file passed through the extradata field. The VQHD header | ||
34 | * is laid out as: | ||
35 | * | ||
36 | * bytes 0-3 chunk fourcc: 'VQHD' | ||
37 | * bytes 4-7 chunk size in big-endian format, should be 0x0000002A | ||
38 | * bytes 8-49 VQHD chunk data | ||
39 | * | ||
40 | * Bytes 8-49 are what this decoder expects to see. | ||
41 | * | ||
42 | * Briefly, VQA is a vector quantized animation format that operates in a | ||
43 | * VGA palettized colorspace. It operates on pixel vectors (blocks) | ||
44 | * of either 4x2 or 4x4 in size. Compressed VQA chunks can contain vector | ||
45 | * codebooks, palette information, and code maps for rendering vectors onto | ||
46 | * frames. Any of these components can also be compressed with a run-length | ||
47 | * encoding (RLE) algorithm commonly referred to as "format80". | ||
48 | * | ||
49 | * VQA takes a novel approach to rate control. Each group of n frames | ||
50 | * (usually, n = 8) relies on a different vector codebook. Rather than | ||
51 | * transporting an entire codebook every 8th frame, the new codebook is | ||
52 | * broken up into 8 pieces and sent along with the compressed video chunks | ||
53 | * for each of the 8 frames preceding the 8 frames which require the | ||
54 | * codebook. A full codebook is also sent on the very first frame of a | ||
55 | * file. This is an interesting technique, although it makes random file | ||
56 | * seeking difficult despite the fact that the frames are all intracoded. | ||
57 | * | ||
58 | * V1,2 VQA uses 12-bit codebook indexes. If the 12-bit indexes were | ||
59 | * packed into bytes and then RLE compressed, bytewise, the results would | ||
60 | * be poor. That is why the coding method divides each index into 2 parts, | ||
61 | * the top 4 bits and the bottom 8 bits, then RL encodes the 4-bit pieces | ||
62 | * together and the 8-bit pieces together. If most of the vectors are | ||
63 | * clustered into one group of 256 vectors, most of the 4-bit index pieces | ||
64 | * should be the same. | ||
65 | * | ||
66 | * VQA3 introduces a 15-bit high color codebook, delta coding, replaces | ||
67 | * the above "split byte" scheme with RLE compression, and extends the | ||
68 | * "format80" compression with relative references. In VQA3 the whole | ||
69 | * codebook is always updated as a whole without splitting it into pieces. | ||
70 | */ | ||
71 | |||
72 | #include <stdio.h> | ||
73 | #include <stdlib.h> | ||
74 | #include <string.h> | ||
75 | |||
76 | #include "libavutil/intreadwrite.h" | ||
77 | #include "libavutil/imgutils.h" | ||
78 | #include "avcodec.h" | ||
79 | #include "bytestream.h" | ||
80 | #include "codec_internal.h" | ||
81 | #include "internal.h" | ||
82 | |||
83 | #define PALETTE_COUNT 256 | ||
84 | #define VQA_HEADER_SIZE 0x2A | ||
85 | |||
86 | /* allocate the maximum vector space, regardless of the file version: | ||
87 | * (0xFF00 codebook vectors + 0x100 solid pixel vectors) * (4x4 pixels/block) */ | ||
88 | #define MAX_CODEBOOK_VECTORS 0xFF00 | ||
89 | #define SOLID_PIXEL_VECTORS 0x100 | ||
90 | #define MAX_VECTORS (MAX_CODEBOOK_VECTORS + SOLID_PIXEL_VECTORS) | ||
91 | #define MAX_CODEBOOK_SIZE (MAX_VECTORS * 4 * 4 * sizeof(uint16_t)) | ||
92 | |||
93 | #define CBF0_TAG MKBETAG('C', 'B', 'F', '0') | ||
94 | #define CBFZ_TAG MKBETAG('C', 'B', 'F', 'Z') | ||
95 | #define CBP0_TAG MKBETAG('C', 'B', 'P', '0') | ||
96 | #define CBPZ_TAG MKBETAG('C', 'B', 'P', 'Z') | ||
97 | #define CPL0_TAG MKBETAG('C', 'P', 'L', '0') | ||
98 | #define CPLZ_TAG MKBETAG('C', 'P', 'L', 'Z') | ||
99 | #define VPTZ_TAG MKBETAG('V', 'P', 'T', 'Z') | ||
100 | #define VPTR_TAG MKBETAG('V', 'P', 'T', 'R') | ||
101 | #define VPRZ_TAG MKBETAG('V', 'P', 'R', 'Z') | ||
102 | |||
103 | typedef struct VqaContext { | ||
104 | AVFrame *frame; | ||
105 | AVCodecContext *avctx; | ||
106 | GetByteContext gb; | ||
107 | |||
108 | uint32_t palette[PALETTE_COUNT]; | ||
109 | |||
110 | int width; /* width of a frame */ | ||
111 | int height; /* height of a frame */ | ||
112 | int vector_width; /* width of individual vector */ | ||
113 | int vector_height; /* height of individual vector */ | ||
114 | int vqa_version; /* this should be either 1, 2 or 3 */ | ||
115 | |||
116 | unsigned char *codebook; /* the current codebook */ | ||
117 | int codebook_size; | ||
118 | unsigned char *next_codebook_buffer; /* accumulator for next codebook */ | ||
119 | int next_codebook_buffer_index; | ||
120 | |||
121 | unsigned char *decode_buffer; | ||
122 | int decode_buffer_size; | ||
123 | |||
124 | /* number of frames to go before replacing codebook */ | ||
125 | int partial_countdown; | ||
126 | int partial_count; | ||
127 | } VqaContext; | ||
128 | |||
129 | 5 | static av_cold int vqa_decode_init(AVCodecContext *avctx) | |
130 | { | ||
131 | 5 | VqaContext *s = avctx->priv_data; | |
132 | int i, j, codebook_index, ret; | ||
133 | int colors; | ||
134 | |||
135 | 5 | s->avctx = avctx; | |
136 | |||
137 | /* make sure the extradata made it */ | ||
138 |
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5 | if (s->avctx->extradata_size != VQA_HEADER_SIZE) { |
139 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "expected extradata size of %d\n", VQA_HEADER_SIZE); | |
140 | ✗ | return AVERROR(EINVAL); | |
141 | } | ||
142 | |||
143 | /* load up the VQA parameters from the header */ | ||
144 | 5 | s->vqa_version = s->avctx->extradata[0]; | |
145 | |||
146 |
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5 | if (s->vqa_version < 1 || s->vqa_version > 3) { |
147 | ✗ | avpriv_request_sample(avctx, "VQA Version %i", s->vqa_version); | |
148 | ✗ | return AVERROR_INVALIDDATA; | |
149 | } | ||
150 | |||
151 | 5 | s->width = AV_RL16(&s->avctx->extradata[6]); | |
152 | 5 | s->height = AV_RL16(&s->avctx->extradata[8]); | |
153 |
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5 | if ((ret = ff_set_dimensions(avctx, s->width, s->height)) < 0) { |
154 | ✗ | s->width= s->height= 0; | |
155 | ✗ | return ret; | |
156 | } | ||
157 | 5 | s->vector_width = s->avctx->extradata[10]; | |
158 | 5 | s->vector_height = s->avctx->extradata[11]; | |
159 | 5 | s->partial_count = s->partial_countdown = s->avctx->extradata[13]; | |
160 | |||
161 | 5 | colors = (s->avctx->extradata[14] << 8) | s->avctx->extradata[15]; | |
162 | |||
163 |
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5 | if (colors > 0) { |
164 | 4 | avctx->pix_fmt = AV_PIX_FMT_PAL8; | |
165 | } else { | ||
166 | 1 | avctx->pix_fmt = AV_PIX_FMT_RGB555LE; | |
167 | } | ||
168 | |||
169 | /* the vector dimensions have to meet very stringent requirements */ | ||
170 |
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5 | if ((s->vector_width != 4) || |
171 |
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5 | ((s->vector_height != 2) && (s->vector_height != 4))) { |
172 | /* return without further initialization */ | ||
173 | ✗ | return AVERROR_INVALIDDATA; | |
174 | } | ||
175 | |||
176 |
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5 | if (s->width % s->vector_width || s->height % s->vector_height) { |
177 | ✗ | av_log(avctx, AV_LOG_ERROR, "Image size not multiple of block size\n"); | |
178 | ✗ | return AVERROR_INVALIDDATA; | |
179 | } | ||
180 | |||
181 | 5 | s->frame = av_frame_alloc(); | |
182 |
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5 | if (!s->frame) |
183 | ✗ | return AVERROR(ENOMEM); | |
184 | |||
185 | /* allocate codebooks */ | ||
186 | 5 | s->codebook_size = MAX_CODEBOOK_SIZE; | |
187 | 5 | s->codebook = av_malloc(s->codebook_size); | |
188 |
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5 | if (!s->codebook) |
189 | ✗ | return AVERROR(ENOMEM); | |
190 | 5 | s->next_codebook_buffer = av_malloc(s->codebook_size); | |
191 |
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5 | if (!s->next_codebook_buffer) |
192 | ✗ | return AVERROR(ENOMEM); | |
193 | |||
194 | /* allocate decode buffer */ | ||
195 | 5 | s->decode_buffer_size = (s->width / s->vector_width) * | |
196 | 5 | (s->height / s->vector_height) * 2; | |
197 | 5 | s->decode_buffer = av_mallocz(s->decode_buffer_size); | |
198 |
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5 | if (!s->decode_buffer) |
199 | ✗ | return AVERROR(ENOMEM); | |
200 | |||
201 | /* initialize the solid-color vectors */ | ||
202 |
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5 | if (s->vector_height == 4) { |
203 | ✗ | codebook_index = 0xFF00 * 16; | |
204 | ✗ | for (i = 0; i < 256; i++) | |
205 | ✗ | for (j = 0; j < 16; j++) | |
206 | ✗ | s->codebook[codebook_index++] = i; | |
207 | } else { | ||
208 | 5 | codebook_index = 0xF00 * 8; | |
209 |
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1285 | for (i = 0; i < 256; i++) |
210 |
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11520 | for (j = 0; j < 8; j++) |
211 | 10240 | s->codebook[codebook_index++] = i; | |
212 | } | ||
213 | 5 | s->next_codebook_buffer_index = 0; | |
214 | |||
215 | 5 | return 0; | |
216 | } | ||
217 | |||
218 | #define CHECK_COUNT() \ | ||
219 | if (dest_index + count > dest_size) { \ | ||
220 | av_log(s->avctx, AV_LOG_ERROR, "decode_format80 problem: next op would overflow dest_index\n"); \ | ||
221 | av_log(s->avctx, AV_LOG_ERROR, "current dest_index = %d, count = %d, dest_size = %d\n", \ | ||
222 | dest_index, count, dest_size); \ | ||
223 | return AVERROR_INVALIDDATA; \ | ||
224 | } | ||
225 | |||
226 | #define CHECK_COPY(idx) \ | ||
227 | if (idx < 0 || idx + count > dest_size) { \ | ||
228 | av_log(s->avctx, AV_LOG_ERROR, "decode_format80 problem: next op would overflow dest_index\n"); \ | ||
229 | av_log(s->avctx, AV_LOG_ERROR, "current src_pos = %d, count = %d, dest_size = %d\n", \ | ||
230 | src_pos, count, dest_size); \ | ||
231 | return AVERROR_INVALIDDATA; \ | ||
232 | } | ||
233 | |||
234 | |||
235 | 38 | static int decode_format80(VqaContext *s, int src_size, | |
236 | unsigned char *dest, int dest_size, int check_size) { | ||
237 | |||
238 | 38 | int dest_index = 0; | |
239 | int count, opcode, start; | ||
240 | int src_pos; | ||
241 | unsigned char color; | ||
242 | int i; | ||
243 | 38 | int relative = 0; | |
244 | |||
245 |
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38 | if (src_size < 0 || src_size > bytestream2_get_bytes_left(&s->gb)) { |
246 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "Chunk size %d is out of range\n", | |
247 | src_size); | ||
248 | ✗ | return AVERROR_INVALIDDATA; | |
249 | } | ||
250 | |||
251 | /* the "new" scheme makes references relative to destination pointer */ | ||
252 |
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38 | if (bytestream2_peek_byte(&s->gb) == 0x00) { |
253 | ✗ | relative = 1; | |
254 | ✗ | bytestream2_get_byte(&s->gb); | |
255 | ff_tlog(s->avctx, "found new format stream "); | ||
256 | } | ||
257 | |||
258 | 38 | start = bytestream2_tell(&s->gb); | |
259 |
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44627 | while (bytestream2_tell(&s->gb) - start < src_size) { |
260 | 44627 | opcode = bytestream2_get_byte(&s->gb); | |
261 | ff_tlog(s->avctx, "opcode %02X: ", opcode); | ||
262 | |||
263 | /* 0x80 means that frame is finished */ | ||
264 |
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44627 | if (opcode == 0x80) |
265 | 38 | break; | |
266 | |||
267 |
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44589 | if (dest_index >= dest_size) { |
268 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "decode_format80 problem: dest_index (%d) exceeded dest_size (%d)\n", | |
269 | dest_index, dest_size); | ||
270 | ✗ | return AVERROR_INVALIDDATA; | |
271 | } | ||
272 | |||
273 |
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44589 | if (opcode == 0xFF) { |
274 | |||
275 | 265 | count = bytestream2_get_le16(&s->gb); | |
276 | 265 | src_pos = bytestream2_get_le16(&s->gb); | |
277 |
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265 | if (relative) |
278 | ✗ | src_pos = dest_index - src_pos; | |
279 | ff_tlog(s->avctx, "(1) copy %X bytes from pos %X\n", count, src_pos); | ||
280 |
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265 | CHECK_COUNT(); |
281 |
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265 | CHECK_COPY(src_pos); |
282 |
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24430 | for (i = 0; i < count; i++) |
283 | 24165 | dest[dest_index + i] = dest[src_pos + i]; | |
284 | 265 | dest_index += count; | |
285 | |||
286 |
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44324 | } else if (opcode == 0xFE) { |
287 | |||
288 | 440 | count = bytestream2_get_le16(&s->gb); | |
289 | 440 | color = bytestream2_get_byte(&s->gb); | |
290 | ff_tlog(s->avctx, "(2) set %X bytes to %02X\n", count, color); | ||
291 |
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440 | CHECK_COUNT(); |
292 | 440 | memset(&dest[dest_index], color, count); | |
293 | 440 | dest_index += count; | |
294 | |||
295 |
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43884 | } else if ((opcode & 0xC0) == 0xC0) { |
296 | |||
297 | 8741 | count = (opcode & 0x3F) + 3; | |
298 | 8741 | src_pos = bytestream2_get_le16(&s->gb); | |
299 |
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8741 | if (relative) |
300 | ✗ | src_pos = dest_index - src_pos; | |
301 | ff_tlog(s->avctx, "(3) copy %X bytes from pos %X\n", count, src_pos); | ||
302 |
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8741 | CHECK_COUNT(); |
303 |
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8741 | CHECK_COPY(src_pos); |
304 |
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190403 | for (i = 0; i < count; i++) |
305 | 181662 | dest[dest_index + i] = dest[src_pos + i]; | |
306 | 8741 | dest_index += count; | |
307 | |||
308 |
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35143 | } else if (opcode > 0x80) { |
309 | |||
310 | 12393 | count = opcode & 0x3F; | |
311 | ff_tlog(s->avctx, "(4) copy %X bytes from source to dest\n", count); | ||
312 |
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12393 | CHECK_COUNT(); |
313 | 12393 | bytestream2_get_buffer(&s->gb, &dest[dest_index], count); | |
314 | 12393 | dest_index += count; | |
315 | |||
316 | } else { | ||
317 | |||
318 | 22750 | count = ((opcode & 0x70) >> 4) + 3; | |
319 | 22750 | src_pos = bytestream2_get_byte(&s->gb) | ((opcode & 0x0F) << 8); | |
320 | ff_tlog(s->avctx, "(5) copy %X bytes from relpos %X\n", count, src_pos); | ||
321 |
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22750 | CHECK_COUNT(); |
322 |
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22750 | CHECK_COPY(dest_index - src_pos); |
323 |
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136572 | for (i = 0; i < count; i++) |
324 | 113822 | dest[dest_index + i] = dest[dest_index - src_pos + i]; | |
325 | 22750 | dest_index += count; | |
326 | } | ||
327 | } | ||
328 | |||
329 | /* validate that the entire destination buffer was filled; this is | ||
330 | * important for decoding frame maps since each vector needs to have a | ||
331 | * codebook entry; it is not important for compressed codebooks because | ||
332 | * not every entry needs to be filled */ | ||
333 |
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38 | if (check_size) |
334 |
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38 | if (dest_index < dest_size) { |
335 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "decode_format80 problem: decode finished with dest_index (%d) < dest_size (%d)\n", | |
336 | dest_index, dest_size); | ||
337 | ✗ | memset(dest + dest_index, 0, dest_size - dest_index); | |
338 | } | ||
339 | |||
340 | 38 | return 0; // let's display what we decoded anyway | |
341 | } | ||
342 | |||
343 | 39 | static int vqa_decode_frame_pal8(VqaContext *s, AVFrame *frame) | |
344 | { | ||
345 | unsigned int chunk_type; | ||
346 | unsigned int chunk_size; | ||
347 | int byte_skip; | ||
348 | 39 | unsigned int index = 0; | |
349 | int i; | ||
350 | unsigned char r, g, b; | ||
351 | int index_shift; | ||
352 | int res; | ||
353 | |||
354 | 39 | int cbf0_chunk = -1; | |
355 | 39 | int cbfz_chunk = -1; | |
356 | 39 | int cbp0_chunk = -1; | |
357 | 39 | int cbpz_chunk = -1; | |
358 | 39 | int cpl0_chunk = -1; | |
359 | 39 | int cplz_chunk = -1; | |
360 | 39 | int vptz_chunk = -1; | |
361 | |||
362 | int x, y; | ||
363 | 39 | int lines = 0; | |
364 | int pixel_ptr; | ||
365 | 39 | int vector_index = 0; | |
366 | 39 | int lobyte = 0; | |
367 | 39 | int hibyte = 0; | |
368 | 39 | int lobytes = 0; | |
369 | 39 | int hibytes = s->decode_buffer_size / 2; | |
370 | |||
371 | /* first, traverse through the frame and find the subchunks */ | ||
372 |
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118 | while (bytestream2_get_bytes_left(&s->gb) >= 8) { |
373 | |||
374 | 79 | chunk_type = bytestream2_get_be32u(&s->gb); | |
375 | 79 | index = bytestream2_tell(&s->gb); | |
376 | 79 | chunk_size = bytestream2_get_be32u(&s->gb); | |
377 | |||
378 |
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79 | switch (chunk_type) { |
379 | |||
380 | 1 | case CBF0_TAG: | |
381 | 1 | cbf0_chunk = index; | |
382 | 1 | break; | |
383 | |||
384 | ✗ | case CBFZ_TAG: | |
385 | ✗ | cbfz_chunk = index; | |
386 | ✗ | break; | |
387 | |||
388 | 39 | case CBP0_TAG: | |
389 | 39 | cbp0_chunk = index; | |
390 | 39 | break; | |
391 | |||
392 | ✗ | case CBPZ_TAG: | |
393 | ✗ | cbpz_chunk = index; | |
394 | ✗ | break; | |
395 | |||
396 | 1 | case CPL0_TAG: | |
397 | 1 | cpl0_chunk = index; | |
398 | 1 | break; | |
399 | |||
400 | ✗ | case CPLZ_TAG: | |
401 | ✗ | cplz_chunk = index; | |
402 | ✗ | break; | |
403 | |||
404 | 38 | case VPTZ_TAG: | |
405 | 38 | vptz_chunk = index; | |
406 | 38 | break; | |
407 | |||
408 | ✗ | default: | |
409 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "Found unknown chunk type: %s (%08X)\n", | |
410 | ✗ | av_fourcc2str(av_bswap32(chunk_type)), chunk_type); | |
411 | ✗ | break; | |
412 | } | ||
413 | |||
414 | 79 | byte_skip = chunk_size & 0x01; | |
415 | 79 | bytestream2_skip(&s->gb, chunk_size + byte_skip); | |
416 | } | ||
417 | |||
418 | /* next, deal with the palette */ | ||
419 |
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39 | if ((cpl0_chunk != -1) && (cplz_chunk != -1)) { |
420 | |||
421 | /* a chunk should not have both chunk types */ | ||
422 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "problem: found both CPL0 and CPLZ chunks\n"); | |
423 | ✗ | return AVERROR_INVALIDDATA; | |
424 | } | ||
425 | |||
426 | /* decompress the palette chunk */ | ||
427 | if (cplz_chunk != -1) { | ||
428 | |||
429 | /* yet to be handled */ | ||
430 | |||
431 | } | ||
432 | |||
433 | /* convert the RGB palette into the machine's endian format */ | ||
434 |
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39 | if (cpl0_chunk != -1) { |
435 | |||
436 | 1 | bytestream2_seek(&s->gb, cpl0_chunk, SEEK_SET); | |
437 | 1 | chunk_size = bytestream2_get_be32(&s->gb); | |
438 | /* sanity check the palette size */ | ||
439 |
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1 | if (chunk_size / 3 > 256 || chunk_size > bytestream2_get_bytes_left(&s->gb)) { |
440 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "problem: found a palette chunk with %d colors\n", | |
441 | chunk_size / 3); | ||
442 | ✗ | return AVERROR_INVALIDDATA; | |
443 | } | ||
444 |
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252 | for (i = 0; i < chunk_size / 3; i++) { |
445 | /* scale by 4 to transform 6-bit palette -> 8-bit */ | ||
446 | 251 | r = bytestream2_get_byteu(&s->gb) * 4; | |
447 | 251 | g = bytestream2_get_byteu(&s->gb) * 4; | |
448 | 251 | b = bytestream2_get_byteu(&s->gb) * 4; | |
449 | 251 | s->palette[i] = 0xFFU << 24 | r << 16 | g << 8 | b; | |
450 | 251 | s->palette[i] |= s->palette[i] >> 6 & 0x30303; | |
451 | } | ||
452 | } | ||
453 | |||
454 | /* next, look for a full codebook */ | ||
455 |
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39 | if ((cbf0_chunk != -1) && (cbfz_chunk != -1)) { |
456 | |||
457 | /* a chunk should not have both chunk types */ | ||
458 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "problem: found both CBF0 and CBFZ chunks\n"); | |
459 | ✗ | return AVERROR_INVALIDDATA; | |
460 | } | ||
461 | |||
462 | /* decompress the full codebook chunk */ | ||
463 |
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39 | if (cbfz_chunk != -1) { |
464 | |||
465 | ✗ | bytestream2_seek(&s->gb, cbfz_chunk, SEEK_SET); | |
466 | ✗ | chunk_size = bytestream2_get_be32(&s->gb); | |
467 | ✗ | if ((res = decode_format80(s, chunk_size, s->codebook, | |
468 | s->codebook_size, 0)) < 0) | ||
469 | ✗ | return res; | |
470 | } | ||
471 | |||
472 | /* copy a full codebook */ | ||
473 |
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39 | if (cbf0_chunk != -1) { |
474 | |||
475 | 1 | bytestream2_seek(&s->gb, cbf0_chunk, SEEK_SET); | |
476 | 1 | chunk_size = bytestream2_get_be32(&s->gb); | |
477 | /* sanity check the full codebook size */ | ||
478 |
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1 | if (chunk_size > MAX_CODEBOOK_SIZE) { |
479 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "problem: CBF0 chunk too large (0x%X bytes)\n", | |
480 | chunk_size); | ||
481 | ✗ | return AVERROR_INVALIDDATA; | |
482 | } | ||
483 | |||
484 | 1 | bytestream2_get_buffer(&s->gb, s->codebook, chunk_size); | |
485 | } | ||
486 | |||
487 | /* decode the frame */ | ||
488 |
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39 | if (vptz_chunk == -1) { |
489 | |||
490 | /* something is wrong if there is no VPTZ chunk */ | ||
491 | 1 | av_log(s->avctx, AV_LOG_ERROR, "problem: no VPTZ chunk found\n"); | |
492 | 1 | return AVERROR_INVALIDDATA; | |
493 | } | ||
494 | |||
495 | 38 | bytestream2_seek(&s->gb, vptz_chunk, SEEK_SET); | |
496 | 38 | chunk_size = bytestream2_get_be32(&s->gb); | |
497 |
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38 | if ((res = decode_format80(s, chunk_size, |
498 | s->decode_buffer, s->decode_buffer_size, 1)) < 0) | ||
499 | ✗ | return res; | |
500 | |||
501 | /* render the final PAL8 frame */ | ||
502 |
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38 | if (s->vector_height == 4) |
503 | ✗ | index_shift = 4; | |
504 | else | ||
505 | 38 | index_shift = 3; | |
506 |
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3838 | for (y = 0; y < s->height; y += s->vector_height) { |
507 |
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307800 | for (x = 0; x < s->width; x += 4, lobytes++, hibytes++) { |
508 | 304000 | pixel_ptr = y * frame->linesize[0] + x; | |
509 | |||
510 | /* get the vector index, the method for which varies according to | ||
511 | * VQA file version */ | ||
512 |
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304000 | switch (s->vqa_version) { |
513 | |||
514 | ✗ | case 1: | |
515 | ✗ | lobyte = s->decode_buffer[lobytes * 2]; | |
516 | ✗ | hibyte = s->decode_buffer[(lobytes * 2) + 1]; | |
517 | ✗ | vector_index = ((hibyte << 8) | lobyte) >> 3; | |
518 | ✗ | vector_index <<= index_shift; | |
519 | ✗ | lines = s->vector_height; | |
520 | /* uniform color fill - a quick hack */ | ||
521 | ✗ | if (hibyte == 0xFF) { | |
522 | ✗ | while (lines--) { | |
523 | ✗ | frame->data[0][pixel_ptr + 0] = 255 - lobyte; | |
524 | ✗ | frame->data[0][pixel_ptr + 1] = 255 - lobyte; | |
525 | ✗ | frame->data[0][pixel_ptr + 2] = 255 - lobyte; | |
526 | ✗ | frame->data[0][pixel_ptr + 3] = 255 - lobyte; | |
527 | ✗ | pixel_ptr += frame->linesize[0]; | |
528 | } | ||
529 | ✗ | lines=0; | |
530 | } | ||
531 | ✗ | break; | |
532 | |||
533 | 304000 | case 2: | |
534 | 304000 | lobyte = s->decode_buffer[lobytes]; | |
535 | 304000 | hibyte = s->decode_buffer[hibytes]; | |
536 | 304000 | vector_index = (hibyte << 8) | lobyte; | |
537 | 304000 | vector_index <<= index_shift; | |
538 | 304000 | lines = s->vector_height; | |
539 | 304000 | break; | |
540 | |||
541 | ✗ | case 3: | |
542 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "VQA3 shouldn't have a color palette"); | |
543 | ✗ | return AVERROR_INVALIDDATA; | |
544 | } | ||
545 | |||
546 |
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912000 | while (lines--) { |
547 | 608000 | frame->data[0][pixel_ptr + 0] = s->codebook[vector_index++]; | |
548 | 608000 | frame->data[0][pixel_ptr + 1] = s->codebook[vector_index++]; | |
549 | 608000 | frame->data[0][pixel_ptr + 2] = s->codebook[vector_index++]; | |
550 | 608000 | frame->data[0][pixel_ptr + 3] = s->codebook[vector_index++]; | |
551 | 608000 | pixel_ptr += frame->linesize[0]; | |
552 | } | ||
553 | } | ||
554 | } | ||
555 | |||
556 | /* handle partial codebook */ | ||
557 |
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38 | if ((cbp0_chunk != -1) && (cbpz_chunk != -1)) { |
558 | /* a chunk should not have both chunk types */ | ||
559 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "problem: found both CBP0 and CBPZ chunks\n"); | |
560 | ✗ | return AVERROR_INVALIDDATA; | |
561 | } | ||
562 | |||
563 |
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38 | if (cbp0_chunk != -1) { |
564 | |||
565 | 38 | bytestream2_seek(&s->gb, cbp0_chunk, SEEK_SET); | |
566 | 38 | chunk_size = bytestream2_get_be32(&s->gb); | |
567 | |||
568 |
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38 | if (chunk_size > MAX_CODEBOOK_SIZE - s->next_codebook_buffer_index) { |
569 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "cbp0 chunk too large (%u bytes)\n", | |
570 | chunk_size); | ||
571 | ✗ | return AVERROR_INVALIDDATA; | |
572 | } | ||
573 | |||
574 | /* accumulate partial codebook */ | ||
575 | 38 | bytestream2_get_buffer(&s->gb, &s->next_codebook_buffer[s->next_codebook_buffer_index], | |
576 | chunk_size); | ||
577 | 38 | s->next_codebook_buffer_index += chunk_size; | |
578 | |||
579 | 38 | s->partial_countdown--; | |
580 |
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38 | if (s->partial_countdown <= 0) { |
581 | |||
582 | /* time to replace codebook */ | ||
583 | 4 | memcpy(s->codebook, s->next_codebook_buffer, | |
584 | 4 | s->next_codebook_buffer_index); | |
585 | |||
586 | /* reset accounting */ | ||
587 | 4 | s->next_codebook_buffer_index = 0; | |
588 | 4 | s->partial_countdown = s->partial_count; | |
589 | } | ||
590 | } | ||
591 | |||
592 |
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38 | if (cbpz_chunk != -1) { |
593 | |||
594 | ✗ | bytestream2_seek(&s->gb, cbpz_chunk, SEEK_SET); | |
595 | ✗ | chunk_size = bytestream2_get_be32(&s->gb); | |
596 | |||
597 | ✗ | if (chunk_size > MAX_CODEBOOK_SIZE - s->next_codebook_buffer_index) { | |
598 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "cbpz chunk too large (%u bytes)\n", | |
599 | chunk_size); | ||
600 | ✗ | return AVERROR_INVALIDDATA; | |
601 | } | ||
602 | |||
603 | /* accumulate partial codebook */ | ||
604 | ✗ | bytestream2_get_buffer(&s->gb, &s->next_codebook_buffer[s->next_codebook_buffer_index], | |
605 | chunk_size); | ||
606 | ✗ | s->next_codebook_buffer_index += chunk_size; | |
607 | |||
608 | ✗ | s->partial_countdown--; | |
609 | ✗ | if (s->partial_countdown <= 0) { | |
610 | ✗ | bytestream2_init(&s->gb, s->next_codebook_buffer, s->next_codebook_buffer_index); | |
611 | /* decompress codebook */ | ||
612 | ✗ | res = decode_format80(s, s->next_codebook_buffer_index, | |
613 | s->codebook, s->codebook_size, 0); | ||
614 | |||
615 | /* reset accounting */ | ||
616 | ✗ | s->next_codebook_buffer_index = 0; | |
617 | ✗ | s->partial_countdown = s->partial_count; | |
618 | ✗ | if (res < 0) | |
619 | ✗ | return res; | |
620 | } | ||
621 | } | ||
622 | |||
623 | 38 | return 0; | |
624 | } | ||
625 | |||
626 | ✗ | static int vqa_decode_frame_hicolor(VqaContext *s, AVFrame *frame) | |
627 | { | ||
628 | unsigned int chunk_type; | ||
629 | unsigned int chunk_size; | ||
630 | ✗ | unsigned int index = 0; | |
631 | int res; | ||
632 | |||
633 | ✗ | int cbf0_chunk = -1; | |
634 | ✗ | int cbfz_chunk = -1; | |
635 | ✗ | int vptr_chunk = -1; | |
636 | ✗ | int vprz_chunk = -1; | |
637 | |||
638 | GetByteContext gb_stream; | ||
639 | |||
640 | ✗ | while (bytestream2_get_bytes_left(&s->gb) >= 8) { | |
641 | ✗ | chunk_type = bytestream2_get_be32u(&s->gb); | |
642 | ✗ | index = bytestream2_tell(&s->gb); | |
643 | ✗ | chunk_size = bytestream2_get_be32u(&s->gb); | |
644 | |||
645 | ✗ | switch (chunk_type) { | |
646 | ✗ | case CBF0_TAG: | |
647 | ✗ | cbf0_chunk = index; | |
648 | ✗ | break; | |
649 | ✗ | case CBFZ_TAG: | |
650 | ✗ | cbfz_chunk = index; | |
651 | ✗ | break; | |
652 | ✗ | case VPTR_TAG: | |
653 | ✗ | vptr_chunk = index; | |
654 | ✗ | break; | |
655 | ✗ | case VPRZ_TAG: | |
656 | ✗ | vprz_chunk = index; | |
657 | ✗ | break; | |
658 | ✗ | default: | |
659 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "Found unknown chunk type: %s (%08X)\n", | |
660 | ✗ | av_fourcc2str(av_bswap32(chunk_type)), chunk_type); | |
661 | ✗ | break; | |
662 | } | ||
663 | |||
664 | ✗ | bytestream2_skip(&s->gb, chunk_size + (chunk_size & 0x01)); | |
665 | } | ||
666 | |||
667 | /* next, look for a full codebook */ | ||
668 | ✗ | if ((cbf0_chunk != -1) && (cbfz_chunk != -1)) { | |
669 | /* a chunk should not have both chunk types */ | ||
670 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "problem: found both CBF0 and CBFZ chunks\n"); | |
671 | ✗ | return AVERROR_INVALIDDATA; | |
672 | } | ||
673 | |||
674 | /* decompress the full codebook chunk */ | ||
675 | ✗ | if (cbfz_chunk != -1) { | |
676 | ✗ | bytestream2_seek(&s->gb, cbfz_chunk, SEEK_SET); | |
677 | ✗ | chunk_size = bytestream2_get_be32(&s->gb); | |
678 | ✗ | if ((res = decode_format80(s, chunk_size, s->codebook, | |
679 | s->codebook_size, 0)) < 0) | ||
680 | ✗ | return res; | |
681 | } | ||
682 | |||
683 | /* copy a full codebook */ | ||
684 | ✗ | if (cbf0_chunk != -1) { | |
685 | ✗ | bytestream2_seek(&s->gb, cbf0_chunk, SEEK_SET); | |
686 | ✗ | chunk_size = bytestream2_get_be32(&s->gb); | |
687 | /* sanity check the full codebook size */ | ||
688 | ✗ | if (chunk_size > MAX_CODEBOOK_SIZE) { | |
689 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "problem: CBF0 chunk too large (0x%X bytes)\n", | |
690 | chunk_size); | ||
691 | ✗ | return AVERROR_INVALIDDATA; | |
692 | } | ||
693 | |||
694 | ✗ | bytestream2_get_buffer(&s->gb, s->codebook, chunk_size); | |
695 | } | ||
696 | |||
697 | /* decode the frame */ | ||
698 | |||
699 | ✗ | if (vptr_chunk != -1) { | |
700 | /* copy uncompressed tile data */ | ||
701 | ✗ | bytestream2_seek(&s->gb, vptr_chunk, SEEK_SET); | |
702 | ✗ | chunk_size = bytestream2_get_be32(&s->gb); | |
703 | ✗ | if (chunk_size > s->decode_buffer_size) { | |
704 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "VPTR chunk didn't fit in decode buffer"); | |
705 | ✗ | return AVERROR_INVALIDDATA; | |
706 | } | ||
707 | ✗ | bytestream2_get_buffer(&s->gb, s->decode_buffer, chunk_size); | |
708 | ✗ | } else if (vprz_chunk != -1) { | |
709 | /* decompress the tile data */ | ||
710 | ✗ | bytestream2_seek(&s->gb, vprz_chunk, SEEK_SET); | |
711 | |||
712 | ✗ | chunk_size = bytestream2_get_be32(&s->gb); | |
713 | ✗ | if ((res = decode_format80(s, chunk_size, s->decode_buffer, s->decode_buffer_size, 0)) < 0) | |
714 | ✗ | return res; | |
715 | } else { | ||
716 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "frame has no block data\n"); | |
717 | ✗ | return AVERROR_INVALIDDATA; | |
718 | } | ||
719 | |||
720 | /* now uncompress the per-row RLE of the decode buffer and draw the blocks in framebuffer */ | ||
721 | |||
722 | ✗ | bytestream2_init(&gb_stream, s->decode_buffer, s->decode_buffer_size); | |
723 | |||
724 | ✗ | for (int y_pos = 0; y_pos < s->height; y_pos += s->vector_height) { | |
725 | ✗ | int x_pos = 0; | |
726 | |||
727 | ✗ | while (x_pos < s->width) { | |
728 | ✗ | int vector_index = 0; | |
729 | ✗ | int count = 0; | |
730 | uint16_t code; | ||
731 | int type; | ||
732 | |||
733 | ✗ | if (bytestream2_get_bytes_left(&gb_stream) < 2) | |
734 | ✗ | return AVERROR_INVALIDDATA; | |
735 | |||
736 | ✗ | code = bytestream2_get_le16(&gb_stream); | |
737 | |||
738 | ✗ | type = code >> 13; | |
739 | ✗ | code &= 0x1fff; | |
740 | |||
741 | ✗ | if (type == 0) { | |
742 | ✗ | x_pos += 4 * code; | |
743 | ✗ | continue; | |
744 | ✗ | } else if (type < 3) { | |
745 | ✗ | vector_index = code & 0xff; | |
746 | ✗ | count = ((code & 0x1f00) >> 7) + 1 + type; | |
747 | ✗ | } else if (type < 5) { | |
748 | ✗ | vector_index = code; | |
749 | ✗ | count = 1; | |
750 | ✗ | } else if (type < 7) { | |
751 | ✗ | vector_index = code; | |
752 | ✗ | count = bytestream2_get_byte(&gb_stream); | |
753 | } else { | ||
754 | ✗ | av_log(s->avctx, AV_LOG_ERROR, " unknown type in VPTR chunk (%d)\n",type); | |
755 | ✗ | return AVERROR_INVALIDDATA; | |
756 | } | ||
757 | |||
758 | ✗ | if (count < 0 || count > (s->width - x_pos) / s->vector_width) { | |
759 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "invalid count: %d\n", count); | |
760 | ✗ | return AVERROR_INVALIDDATA; | |
761 | } | ||
762 | |||
763 | ✗ | while (count-- && x_pos < s->width) { | |
764 | ✗ | const int bytes_per_vector = 4 * s->vector_height * sizeof(uint16_t); | |
765 | ✗ | unsigned char *src = s->codebook + vector_index * bytes_per_vector; | |
766 | ✗ | unsigned char *dst = s->frame->data[0] + y_pos * s->frame->linesize[0] | |
767 | ✗ | + sizeof(uint16_t) * x_pos; | |
768 | |||
769 | ✗ | if (vector_index >= MAX_VECTORS) | |
770 | ✗ | return AVERROR_INVALIDDATA; | |
771 | |||
772 | ✗ | for (int y = 0; y < s->vector_height; y++) { | |
773 | ✗ | int size = 4 * sizeof(uint16_t); | |
774 | ✗ | memcpy(dst, src, size); | |
775 | ✗ | dst += s->frame->linesize[0]; | |
776 | ✗ | src += size; | |
777 | } | ||
778 | |||
779 | /* we might want to read the next block index from stream */ | ||
780 | ✗ | if ((type == 2) && count > 0) { | |
781 | ✗ | vector_index = bytestream2_get_byte(&gb_stream); | |
782 | } | ||
783 | |||
784 | ✗ | x_pos += 4; | |
785 | } | ||
786 | |||
787 | ✗ | if (count > 0) { | |
788 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "had %d leftover vectors\n", count); | |
789 | ✗ | return AVERROR_BUG; | |
790 | } | ||
791 | } | ||
792 | } | ||
793 | |||
794 | ✗ | return 0; | |
795 | } | ||
796 | |||
797 | 39 | static int vqa_decode_frame(AVCodecContext *avctx, AVFrame *rframe, | |
798 | int *got_frame, AVPacket *avpkt) | ||
799 | { | ||
800 | 39 | VqaContext *s = avctx->priv_data; | |
801 | int res; | ||
802 | |||
803 |
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39 | if ((res = ff_reget_buffer(avctx, s->frame, 0)) < 0) |
804 | ✗ | return res; | |
805 | |||
806 | 39 | bytestream2_init(&s->gb, avpkt->data, avpkt->size); | |
807 | |||
808 |
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39 | if (avctx->pix_fmt == AV_PIX_FMT_PAL8) { |
809 |
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39 | if ((res = vqa_decode_frame_pal8(s, s->frame)) < 0) |
810 | 1 | return res; | |
811 | |||
812 | /* make the palette available on the way out */ | ||
813 | 38 | memcpy(s->frame->data[1], s->palette, PALETTE_COUNT * 4); | |
814 | 38 | s->frame->palette_has_changed = 1; | |
815 | ✗ | } else if (avctx->pix_fmt == AV_PIX_FMT_RGB555LE) { | |
816 | ✗ | if ((res = vqa_decode_frame_hicolor(s, s->frame)) < 0) | |
817 | ✗ | return res; | |
818 | } else { | ||
819 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "unsupported pixel format\n"); | |
820 | ✗ | return AVERROR_BUG; | |
821 | } | ||
822 | |||
823 |
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38 | if ((res = av_frame_ref(rframe, s->frame)) < 0) |
824 | ✗ | return res; | |
825 | |||
826 | 38 | *got_frame = 1; | |
827 | |||
828 | /* report that the buffer was completely consumed */ | ||
829 | 38 | return avpkt->size; | |
830 | } | ||
831 | |||
832 | 5 | static av_cold int vqa_decode_end(AVCodecContext *avctx) | |
833 | { | ||
834 | 5 | VqaContext *s = avctx->priv_data; | |
835 | |||
836 | 5 | av_frame_free(&s->frame); | |
837 | 5 | av_freep(&s->codebook); | |
838 | 5 | av_freep(&s->next_codebook_buffer); | |
839 | 5 | av_freep(&s->decode_buffer); | |
840 | |||
841 | 5 | return 0; | |
842 | } | ||
843 | |||
844 | static const FFCodecDefault vqa_defaults[] = { | ||
845 | { "max_pixels", "640*480" }, | ||
846 | { NULL }, | ||
847 | }; | ||
848 | |||
849 | const FFCodec ff_vqa_decoder = { | ||
850 | .p.name = "vqavideo", | ||
851 | .p.long_name = NULL_IF_CONFIG_SMALL("Westwood Studios VQA (Vector Quantized Animation) video"), | ||
852 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
853 | .p.id = AV_CODEC_ID_WS_VQA, | ||
854 | .priv_data_size = sizeof(VqaContext), | ||
855 | .init = vqa_decode_init, | ||
856 | .close = vqa_decode_end, | ||
857 | FF_CODEC_DECODE_CB(vqa_decode_frame), | ||
858 | .p.capabilities = AV_CODEC_CAP_DR1, | ||
859 | .defaults = vqa_defaults, | ||
860 | .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP, | ||
861 | }; | ||
862 |