Directory: | ../../../ffmpeg/ |
---|---|
File: | src/libavcodec/cllc.c |
Date: | 2022-07-05 19:52:29 |
Exec | Total | Coverage | |
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Lines: | 187 | 225 | 83.1% |
Branches: | 69 | 96 | 71.9% |
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1 | /* | ||
2 | * Canopus Lossless Codec decoder | ||
3 | * | ||
4 | * Copyright (c) 2012-2013 Derek Buitenhuis | ||
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 | #include <inttypes.h> | ||
24 | |||
25 | #include "libavutil/intreadwrite.h" | ||
26 | #include "bswapdsp.h" | ||
27 | #include "canopus.h" | ||
28 | #include "get_bits.h" | ||
29 | #include "avcodec.h" | ||
30 | #include "codec_internal.h" | ||
31 | #include "thread.h" | ||
32 | |||
33 | #define VLC_BITS 7 | ||
34 | #define VLC_DEPTH 2 | ||
35 | |||
36 | |||
37 | typedef struct CLLCContext { | ||
38 | AVCodecContext *avctx; | ||
39 | BswapDSPContext bdsp; | ||
40 | |||
41 | uint8_t *swapped_buf; | ||
42 | int swapped_buf_size; | ||
43 | } CLLCContext; | ||
44 | |||
45 | 106 | static int read_code_table(CLLCContext *ctx, GetBitContext *gb, VLC *vlc) | |
46 | { | ||
47 | uint8_t symbols[256]; | ||
48 | uint8_t bits[256]; | ||
49 | int num_lens, num_codes, num_codes_sum; | ||
50 | int i, j, count; | ||
51 | |||
52 | 106 | count = 0; | |
53 | 106 | num_codes_sum = 0; | |
54 | |||
55 | 106 | num_lens = get_bits(gb, 5); | |
56 | |||
57 |
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106 | if (num_lens > VLC_BITS * VLC_DEPTH) { |
58 | ✗ | av_log(ctx->avctx, AV_LOG_ERROR, "To long VLCs %d\n", num_lens); | |
59 | ✗ | return AVERROR_INVALIDDATA; | |
60 | } | ||
61 | |||
62 |
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1545 | for (i = 0; i < num_lens; i++) { |
63 | 1439 | num_codes = get_bits(gb, 9); | |
64 | 1439 | num_codes_sum += num_codes; | |
65 | |||
66 |
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1439 | if (num_codes_sum > 256) { |
67 | ✗ | av_log(ctx->avctx, AV_LOG_ERROR, | |
68 | "Too many VLCs (%d) to be read.\n", num_codes_sum); | ||
69 | ✗ | return AVERROR_INVALIDDATA; | |
70 | } | ||
71 | |||
72 |
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27476 | for (j = 0; j < num_codes; j++) { |
73 | 26037 | symbols[count] = get_bits(gb, 8); | |
74 | 26037 | bits[count] = i + 1; | |
75 | |||
76 | 26037 | count++; | |
77 | } | ||
78 | } | ||
79 | |||
80 | 106 | return ff_init_vlc_from_lengths(vlc, VLC_BITS, count, bits, 1, | |
81 | 106 | symbols, 1, 1, 0, 0, ctx->avctx); | |
82 | } | ||
83 | |||
84 | /* | ||
85 | * Unlike the RGB24 read/restore, which reads in a component at a time, | ||
86 | * ARGB read/restore reads in ARGB quads. | ||
87 | */ | ||
88 | 4320 | static int read_argb_line(CLLCContext *ctx, GetBitContext *gb, int *top_left, | |
89 | VLC *vlc, uint8_t *outbuf) | ||
90 | { | ||
91 | uint8_t *dst; | ||
92 | int pred[4]; | ||
93 | int code; | ||
94 | int i; | ||
95 | |||
96 | 4320 | OPEN_READER(bits, gb); | |
97 | |||
98 | 4320 | dst = outbuf; | |
99 | 4320 | pred[0] = top_left[0]; | |
100 | 4320 | pred[1] = top_left[1]; | |
101 | 4320 | pred[2] = top_left[2]; | |
102 | 4320 | pred[3] = top_left[3]; | |
103 | |||
104 |
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5533920 | for (i = 0; i < ctx->avctx->width; i++) { |
105 | /* Always get the alpha component */ | ||
106 | 5529600 | UPDATE_CACHE(bits, gb); | |
107 |
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5529600 | GET_VLC(code, bits, gb, vlc[0].table, VLC_BITS, VLC_DEPTH); |
108 | |||
109 | 5529600 | pred[0] += code; | |
110 | 5529600 | dst[0] = pred[0]; | |
111 | |||
112 | /* Skip the components if they are entirely transparent */ | ||
113 |
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5529600 | if (dst[0]) { |
114 | /* Red */ | ||
115 | 872412 | UPDATE_CACHE(bits, gb); | |
116 |
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872412 | GET_VLC(code, bits, gb, vlc[1].table, VLC_BITS, VLC_DEPTH); |
117 | |||
118 | 872412 | pred[1] += code; | |
119 | 872412 | dst[1] = pred[1]; | |
120 | |||
121 | /* Green */ | ||
122 | 872412 | UPDATE_CACHE(bits, gb); | |
123 |
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872412 | GET_VLC(code, bits, gb, vlc[2].table, VLC_BITS, VLC_DEPTH); |
124 | |||
125 | 872412 | pred[2] += code; | |
126 | 872412 | dst[2] = pred[2]; | |
127 | |||
128 | /* Blue */ | ||
129 | 872412 | UPDATE_CACHE(bits, gb); | |
130 |
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872412 | GET_VLC(code, bits, gb, vlc[3].table, VLC_BITS, VLC_DEPTH); |
131 | |||
132 | 872412 | pred[3] += code; | |
133 | 872412 | dst[3] = pred[3]; | |
134 | } else { | ||
135 | 4657188 | dst[1] = 0; | |
136 | 4657188 | dst[2] = 0; | |
137 | 4657188 | dst[3] = 0; | |
138 | } | ||
139 | |||
140 | 5529600 | dst += 4; | |
141 | } | ||
142 | |||
143 | 4320 | CLOSE_READER(bits, gb); | |
144 | |||
145 | 4320 | top_left[0] = outbuf[0]; | |
146 | |||
147 | /* Only stash components if they are not transparent */ | ||
148 |
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4320 | if (top_left[0]) { |
149 | ✗ | top_left[1] = outbuf[1]; | |
150 | ✗ | top_left[2] = outbuf[2]; | |
151 | ✗ | top_left[3] = outbuf[3]; | |
152 | } | ||
153 | |||
154 | 4320 | return 0; | |
155 | } | ||
156 | |||
157 | 23040 | static int read_rgb24_component_line(CLLCContext *ctx, GetBitContext *gb, | |
158 | int *top_left, VLC *vlc, uint8_t *outbuf) | ||
159 | { | ||
160 | uint8_t *dst; | ||
161 | int pred, code; | ||
162 | int i; | ||
163 | |||
164 | 23040 | OPEN_READER(bits, gb); | |
165 | |||
166 | 23040 | dst = outbuf; | |
167 | 23040 | pred = *top_left; | |
168 | |||
169 | /* Simultaneously read and restore the line */ | ||
170 |
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14768640 | for (i = 0; i < ctx->avctx->width; i++) { |
171 | 14745600 | UPDATE_CACHE(bits, gb); | |
172 |
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14745600 | GET_VLC(code, bits, gb, vlc->table, VLC_BITS, VLC_DEPTH); |
173 | |||
174 | 14745600 | pred += code; | |
175 | 14745600 | dst[0] = pred; | |
176 | 14745600 | dst += 3; | |
177 | } | ||
178 | |||
179 | 23040 | CLOSE_READER(bits, gb); | |
180 | |||
181 | /* Stash the first pixel */ | ||
182 | 23040 | *top_left = outbuf[0]; | |
183 | |||
184 | 23040 | return 0; | |
185 | } | ||
186 | |||
187 | 24480 | static int read_yuv_component_line(CLLCContext *ctx, GetBitContext *gb, | |
188 | int *top_left, VLC *vlc, uint8_t *outbuf, | ||
189 | int is_chroma) | ||
190 | { | ||
191 | int pred, code; | ||
192 | int i; | ||
193 | |||
194 | 24480 | OPEN_READER(bits, gb); | |
195 | |||
196 | 24480 | pred = *top_left; | |
197 | |||
198 | /* Simultaneously read and restore the line */ | ||
199 |
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10469280 | for (i = 0; i < ctx->avctx->width >> is_chroma; i++) { |
200 | 10444800 | UPDATE_CACHE(bits, gb); | |
201 |
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10444800 | GET_VLC(code, bits, gb, vlc->table, VLC_BITS, VLC_DEPTH); |
202 | |||
203 | 10444800 | pred += code; | |
204 | 10444800 | outbuf[i] = pred; | |
205 | } | ||
206 | |||
207 | 24480 | CLOSE_READER(bits, gb); | |
208 | |||
209 | /* Stash the first pixel */ | ||
210 | 24480 | *top_left = outbuf[0]; | |
211 | |||
212 | 24480 | return 0; | |
213 | } | ||
214 | |||
215 | 6 | static int decode_argb_frame(CLLCContext *ctx, GetBitContext *gb, AVFrame *pic) | |
216 | { | ||
217 | 6 | AVCodecContext *avctx = ctx->avctx; | |
218 | uint8_t *dst; | ||
219 | int pred[4]; | ||
220 | int ret; | ||
221 | int i, j; | ||
222 | VLC vlc[4]; | ||
223 | |||
224 | 6 | pred[0] = 0; | |
225 | 6 | pred[1] = 0x80; | |
226 | 6 | pred[2] = 0x80; | |
227 | 6 | pred[3] = 0x80; | |
228 | |||
229 | 6 | dst = pic->data[0]; | |
230 | |||
231 | 6 | skip_bits(gb, 16); | |
232 | |||
233 | /* Read in code table for each plane */ | ||
234 |
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30 | for (i = 0; i < 4; i++) { |
235 | 24 | ret = read_code_table(ctx, gb, &vlc[i]); | |
236 |
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24 | if (ret < 0) { |
237 | ✗ | for (j = 0; j < i; j++) | |
238 | ✗ | ff_free_vlc(&vlc[j]); | |
239 | |||
240 | ✗ | av_log(ctx->avctx, AV_LOG_ERROR, | |
241 | "Could not read code table %d.\n", i); | ||
242 | ✗ | return ret; | |
243 | } | ||
244 | } | ||
245 | |||
246 | /* Read in and restore every line */ | ||
247 |
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4326 | for (i = 0; i < avctx->height; i++) { |
248 | 4320 | read_argb_line(ctx, gb, pred, vlc, dst); | |
249 | |||
250 | 4320 | dst += pic->linesize[0]; | |
251 | } | ||
252 | |||
253 |
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30 | for (i = 0; i < 4; i++) |
254 | 24 | ff_free_vlc(&vlc[i]); | |
255 | |||
256 | 6 | return 0; | |
257 | } | ||
258 | |||
259 | 16 | static int decode_rgb24_frame(CLLCContext *ctx, GetBitContext *gb, AVFrame *pic) | |
260 | { | ||
261 | 16 | AVCodecContext *avctx = ctx->avctx; | |
262 | uint8_t *dst; | ||
263 | int pred[3]; | ||
264 | int ret; | ||
265 | int i, j; | ||
266 | VLC vlc[3]; | ||
267 | |||
268 | 16 | pred[0] = 0x80; | |
269 | 16 | pred[1] = 0x80; | |
270 | 16 | pred[2] = 0x80; | |
271 | |||
272 | 16 | dst = pic->data[0]; | |
273 | |||
274 | 16 | skip_bits(gb, 16); | |
275 | |||
276 | /* Read in code table for each plane */ | ||
277 |
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64 | for (i = 0; i < 3; i++) { |
278 | 48 | ret = read_code_table(ctx, gb, &vlc[i]); | |
279 |
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48 | if (ret < 0) { |
280 | ✗ | for (j = 0; j < i; j++) | |
281 | ✗ | ff_free_vlc(&vlc[j]); | |
282 | |||
283 | ✗ | av_log(ctx->avctx, AV_LOG_ERROR, | |
284 | "Could not read code table %d.\n", i); | ||
285 | ✗ | return ret; | |
286 | } | ||
287 | } | ||
288 | |||
289 | /* Read in and restore every line */ | ||
290 |
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7696 | for (i = 0; i < avctx->height; i++) { |
291 |
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30720 | for (j = 0; j < 3; j++) |
292 | 23040 | read_rgb24_component_line(ctx, gb, &pred[j], &vlc[j], &dst[j]); | |
293 | |||
294 | 7680 | dst += pic->linesize[0]; | |
295 | } | ||
296 | |||
297 |
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64 | for (i = 0; i < 3; i++) |
298 | 48 | ff_free_vlc(&vlc[i]); | |
299 | |||
300 | 16 | return 0; | |
301 | } | ||
302 | |||
303 | 17 | static int decode_yuv_frame(CLLCContext *ctx, GetBitContext *gb, AVFrame *pic) | |
304 | { | ||
305 | 17 | AVCodecContext *avctx = ctx->avctx; | |
306 | uint8_t block; | ||
307 | uint8_t *dst[3]; | ||
308 | int pred[3]; | ||
309 | int ret; | ||
310 | int i, j; | ||
311 | VLC vlc[2]; | ||
312 | |||
313 | 17 | pred[0] = 0x80; | |
314 | 17 | pred[1] = 0x80; | |
315 | 17 | pred[2] = 0x80; | |
316 | |||
317 | 17 | dst[0] = pic->data[0]; | |
318 | 17 | dst[1] = pic->data[1]; | |
319 | 17 | dst[2] = pic->data[2]; | |
320 | |||
321 | 17 | skip_bits(gb, 8); | |
322 | |||
323 | 17 | block = get_bits(gb, 8); | |
324 |
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17 | if (block) { |
325 | ✗ | avpriv_request_sample(ctx->avctx, "Blocked YUV"); | |
326 | ✗ | return AVERROR_PATCHWELCOME; | |
327 | } | ||
328 | |||
329 | /* Read in code table for luma and chroma */ | ||
330 |
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51 | for (i = 0; i < 2; i++) { |
331 | 34 | ret = read_code_table(ctx, gb, &vlc[i]); | |
332 |
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34 | if (ret < 0) { |
333 | ✗ | for (j = 0; j < i; j++) | |
334 | ✗ | ff_free_vlc(&vlc[j]); | |
335 | |||
336 | ✗ | av_log(ctx->avctx, AV_LOG_ERROR, | |
337 | "Could not read code table %d.\n", i); | ||
338 | ✗ | return ret; | |
339 | } | ||
340 | } | ||
341 | |||
342 | /* Read in and restore every line */ | ||
343 |
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8177 | for (i = 0; i < avctx->height; i++) { |
344 | 8160 | read_yuv_component_line(ctx, gb, &pred[0], &vlc[0], dst[0], 0); /* Y */ | |
345 | 8160 | read_yuv_component_line(ctx, gb, &pred[1], &vlc[1], dst[1], 1); /* U */ | |
346 | 8160 | read_yuv_component_line(ctx, gb, &pred[2], &vlc[1], dst[2], 1); /* V */ | |
347 | |||
348 |
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32640 | for (j = 0; j < 3; j++) |
349 | 24480 | dst[j] += pic->linesize[j]; | |
350 | } | ||
351 | |||
352 |
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51 | for (i = 0; i < 2; i++) |
353 | 34 | ff_free_vlc(&vlc[i]); | |
354 | |||
355 | 17 | return 0; | |
356 | } | ||
357 | |||
358 | 39 | static int cllc_decode_frame(AVCodecContext *avctx, AVFrame *pic, | |
359 | int *got_picture_ptr, AVPacket *avpkt) | ||
360 | { | ||
361 | 39 | CLLCContext *ctx = avctx->priv_data; | |
362 | 39 | const uint8_t *src = avpkt->data; | |
363 | uint32_t info_tag, info_offset; | ||
364 | int data_size; | ||
365 | GetBitContext gb; | ||
366 | int coding_type, ret; | ||
367 | |||
368 |
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39 | if (avpkt->size < 4 + 4) { |
369 | ✗ | av_log(avctx, AV_LOG_ERROR, "Frame is too small %d.\n", avpkt->size); | |
370 | ✗ | return AVERROR_INVALIDDATA; | |
371 | } | ||
372 | |||
373 | 39 | info_offset = 0; | |
374 | 39 | info_tag = AV_RL32(src); | |
375 |
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39 | if (info_tag == MKTAG('I', 'N', 'F', 'O')) { |
376 | 39 | info_offset = AV_RL32(src + 4); | |
377 |
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39 | if (info_offset > UINT32_MAX - 8 || info_offset + 8 > avpkt->size) { |
378 | ✗ | av_log(avctx, AV_LOG_ERROR, | |
379 | "Invalid INFO header offset: 0x%08"PRIX32" is too large.\n", | ||
380 | info_offset); | ||
381 | ✗ | return AVERROR_INVALIDDATA; | |
382 | } | ||
383 | 39 | ff_canopus_parse_info_tag(avctx, src + 8, info_offset); | |
384 | |||
385 | 39 | info_offset += 8; | |
386 | 39 | src += info_offset; | |
387 | } | ||
388 | |||
389 | 39 | data_size = (avpkt->size - info_offset) & ~1; | |
390 | |||
391 | /* Make sure our bswap16'd buffer is big enough */ | ||
392 | 39 | av_fast_padded_malloc(&ctx->swapped_buf, | |
393 | 39 | &ctx->swapped_buf_size, data_size); | |
394 |
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39 | if (!ctx->swapped_buf) { |
395 | ✗ | av_log(avctx, AV_LOG_ERROR, "Could not allocate swapped buffer.\n"); | |
396 | ✗ | return AVERROR(ENOMEM); | |
397 | } | ||
398 | |||
399 | /* bswap16 the buffer since CLLC's bitreader works in 16-bit words */ | ||
400 | 39 | ctx->bdsp.bswap16_buf((uint16_t *) ctx->swapped_buf, (uint16_t *) src, | |
401 | data_size / 2); | ||
402 | |||
403 |
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39 | if ((ret = init_get_bits8(&gb, ctx->swapped_buf, data_size)) < 0) |
404 | ✗ | return ret; | |
405 | |||
406 | /* | ||
407 | * Read in coding type. The types are as follows: | ||
408 | * | ||
409 | * 0 - YUY2 | ||
410 | * 1 - BGR24 (Triples) | ||
411 | * 2 - BGR24 (Quads) | ||
412 | * 3 - BGRA | ||
413 | */ | ||
414 | 39 | coding_type = (AV_RL32(src) >> 8) & 0xFF; | |
415 | 39 | av_log(avctx, AV_LOG_DEBUG, "Frame coding type: %d\n", coding_type); | |
416 | |||
417 |
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39 | if(get_bits_left(&gb) < avctx->height * avctx->width) |
418 | ✗ | return AVERROR_INVALIDDATA; | |
419 | |||
420 |
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39 | switch (coding_type) { |
421 | 17 | case 0: | |
422 | 17 | avctx->pix_fmt = AV_PIX_FMT_YUV422P; | |
423 | 17 | avctx->bits_per_raw_sample = 8; | |
424 | |||
425 |
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17 | if ((ret = ff_thread_get_buffer(avctx, pic, 0)) < 0) |
426 | ✗ | return ret; | |
427 | |||
428 | 17 | ret = decode_yuv_frame(ctx, &gb, pic); | |
429 |
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17 | if (ret < 0) |
430 | ✗ | return ret; | |
431 | |||
432 | 17 | break; | |
433 | 16 | case 1: | |
434 | case 2: | ||
435 | 16 | avctx->pix_fmt = AV_PIX_FMT_RGB24; | |
436 | 16 | avctx->bits_per_raw_sample = 8; | |
437 | |||
438 |
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16 | if ((ret = ff_thread_get_buffer(avctx, pic, 0)) < 0) |
439 | ✗ | return ret; | |
440 | |||
441 | 16 | ret = decode_rgb24_frame(ctx, &gb, pic); | |
442 |
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16 | if (ret < 0) |
443 | ✗ | return ret; | |
444 | |||
445 | 16 | break; | |
446 | 6 | case 3: | |
447 | 6 | avctx->pix_fmt = AV_PIX_FMT_ARGB; | |
448 | 6 | avctx->bits_per_raw_sample = 8; | |
449 | |||
450 |
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6 | if ((ret = ff_thread_get_buffer(avctx, pic, 0)) < 0) |
451 | ✗ | return ret; | |
452 | |||
453 | 6 | ret = decode_argb_frame(ctx, &gb, pic); | |
454 |
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6 | if (ret < 0) |
455 | ✗ | return ret; | |
456 | |||
457 | 6 | break; | |
458 | ✗ | default: | |
459 | ✗ | av_log(avctx, AV_LOG_ERROR, "Unknown coding type: %d.\n", coding_type); | |
460 | ✗ | return AVERROR_INVALIDDATA; | |
461 | } | ||
462 | |||
463 | 39 | pic->key_frame = 1; | |
464 | 39 | pic->pict_type = AV_PICTURE_TYPE_I; | |
465 | |||
466 | 39 | *got_picture_ptr = 1; | |
467 | |||
468 | 39 | return avpkt->size; | |
469 | } | ||
470 | |||
471 | 6 | static av_cold int cllc_decode_close(AVCodecContext *avctx) | |
472 | { | ||
473 | 6 | CLLCContext *ctx = avctx->priv_data; | |
474 | |||
475 | 6 | av_freep(&ctx->swapped_buf); | |
476 | |||
477 | 6 | return 0; | |
478 | } | ||
479 | |||
480 | 6 | static av_cold int cllc_decode_init(AVCodecContext *avctx) | |
481 | { | ||
482 | 6 | CLLCContext *ctx = avctx->priv_data; | |
483 | |||
484 | /* Initialize various context values */ | ||
485 | 6 | ctx->avctx = avctx; | |
486 | 6 | ctx->swapped_buf = NULL; | |
487 | 6 | ctx->swapped_buf_size = 0; | |
488 | |||
489 | 6 | ff_bswapdsp_init(&ctx->bdsp); | |
490 | |||
491 | 6 | return 0; | |
492 | } | ||
493 | |||
494 | const FFCodec ff_cllc_decoder = { | ||
495 | .p.name = "cllc", | ||
496 | .p.long_name = NULL_IF_CONFIG_SMALL("Canopus Lossless Codec"), | ||
497 | .p.type = AVMEDIA_TYPE_VIDEO, | ||
498 | .p.id = AV_CODEC_ID_CLLC, | ||
499 | .priv_data_size = sizeof(CLLCContext), | ||
500 | .init = cllc_decode_init, | ||
501 | FF_CODEC_DECODE_CB(cllc_decode_frame), | ||
502 | .close = cllc_decode_close, | ||
503 | .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS, | ||
504 | .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, | ||
505 | }; | ||
506 |