FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/qdrw.c
Date: 2021-09-26 18:22:30
Exec Total Coverage
Lines: 149 295 50.5%
Branches: 75 209 35.9%

Line Branch Exec Source
1 /*
2 * QuickDraw (qdrw) codec
3 * Copyright (c) 2004 Konstantin Shishkov
4 * Copyright (c) 2015 Vittorio Giovara
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 * Apple QuickDraw codec.
26 * https://developer.apple.com/legacy/library/documentation/mac/QuickDraw/QuickDraw-461.html
27 */
28
29 #include "libavutil/common.h"
30 #include "libavutil/intreadwrite.h"
31 #include "avcodec.h"
32 #include "bytestream.h"
33 #include "internal.h"
34
35 enum QuickdrawOpcodes {
36 CLIP = 0x0001,
37 PACKBITSRECT = 0x0098,
38 PACKBITSRGN,
39 DIRECTBITSRECT,
40 DIRECTBITSRGN,
41 SHORTCOMMENT = 0x00A0,
42 LONGCOMMENT,
43
44 EOP = 0x00FF,
45 };
46
47 13 static int parse_palette(AVCodecContext *avctx, GetByteContext *gbc,
48 uint32_t *pal, int colors, int pixmap)
49 {
50 int i;
51
52
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3341 for (i = 0; i <= colors; i++) {
53 uint8_t r, g, b;
54 3328 unsigned int idx = bytestream2_get_be16(gbc); /* color index */
55
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3328 if (idx > 255 && !pixmap) {
56 av_log(avctx, AV_LOG_WARNING,
57 "Palette index out of range: %u\n", idx);
58 bytestream2_skip(gbc, 6);
59 continue;
60 }
61
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3328 if (avctx->pix_fmt != AV_PIX_FMT_PAL8)
62 return AVERROR_INVALIDDATA;
63 3328 r = bytestream2_get_byte(gbc);
64 3328 bytestream2_skip(gbc, 1);
65 3328 g = bytestream2_get_byte(gbc);
66 3328 bytestream2_skip(gbc, 1);
67 3328 b = bytestream2_get_byte(gbc);
68 3328 bytestream2_skip(gbc, 1);
69
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3328 pal[pixmap ? i : idx] = (0xFFU << 24) | (r << 16) | (g << 8) | b;
70 }
71 13 return 0;
72 }
73
74 static int decode_rle_bpp2(AVCodecContext *avctx, AVFrame *p, GetByteContext *gbc)
75 {
76 int offset = avctx->width;
77 uint8_t *outdata = p->data[0];
78 int i, j;
79
80 for (i = 0; i < avctx->height; i++) {
81 int size, left, code, pix;
82 uint8_t *out = outdata;
83 int pos = 0;
84
85 /* size of packed line */
86 if (offset / 4 > 200)
87 size = left = bytestream2_get_be16(gbc);
88 else
89 size = left = bytestream2_get_byte(gbc);
90 if (bytestream2_get_bytes_left(gbc) < size)
91 return AVERROR_INVALIDDATA;
92
93 /* decode line */
94 while (left > 0) {
95 code = bytestream2_get_byte(gbc);
96 if (code & 0x80 ) { /* run */
97 pix = bytestream2_get_byte(gbc);
98 for (j = 0; j < 257 - code; j++) {
99 if (pos < offset)
100 out[pos++] = (pix & 0xC0) >> 6;
101 if (pos < offset)
102 out[pos++] = (pix & 0x30) >> 4;
103 if (pos < offset)
104 out[pos++] = (pix & 0x0C) >> 2;
105 if (pos < offset)
106 out[pos++] = (pix & 0x03);
107 }
108 left -= 2;
109 } else { /* copy */
110 for (j = 0; j < code + 1; j++) {
111 pix = bytestream2_get_byte(gbc);
112 if (pos < offset)
113 out[pos++] = (pix & 0xC0) >> 6;
114 if (pos < offset)
115 out[pos++] = (pix & 0x30) >> 4;
116 if (pos < offset)
117 out[pos++] = (pix & 0x0C) >> 2;
118 if (pos < offset)
119 out[pos++] = (pix & 0x03);
120 }
121 left -= 1 + (code + 1);
122 }
123 }
124 outdata += p->linesize[0];
125 }
126 return 0;
127 }
128
129 static int decode_rle_bpp4(AVCodecContext *avctx, AVFrame *p, GetByteContext *gbc)
130 {
131 int offset = avctx->width;
132 uint8_t *outdata = p->data[0];
133 int i, j;
134
135 for (i = 0; i < avctx->height; i++) {
136 int size, left, code, pix;
137 uint8_t *out = outdata;
138 int pos = 0;
139
140 /* size of packed line */
141 size = left = bytestream2_get_be16(gbc);
142 if (bytestream2_get_bytes_left(gbc) < size)
143 return AVERROR_INVALIDDATA;
144
145 /* decode line */
146 while (left > 0) {
147 code = bytestream2_get_byte(gbc);
148 if (code & 0x80 ) { /* run */
149 pix = bytestream2_get_byte(gbc);
150 for (j = 0; j < 257 - code; j++) {
151 if (pos < offset)
152 out[pos++] = (pix & 0xF0) >> 4;
153 if (pos < offset)
154 out[pos++] = pix & 0xF;
155 }
156 left -= 2;
157 } else { /* copy */
158 for (j = 0; j < code + 1; j++) {
159 pix = bytestream2_get_byte(gbc);
160 if (pos < offset)
161 out[pos++] = (pix & 0xF0) >> 4;
162 if (pos < offset)
163 out[pos++] = pix & 0xF;
164 }
165 left -= 1 + (code + 1);
166 }
167 }
168 outdata += p->linesize[0];
169 }
170 return 0;
171 }
172
173 static int decode_rle16(AVCodecContext *avctx, AVFrame *p, GetByteContext *gbc)
174 {
175 int offset = avctx->width;
176 uint8_t *outdata = p->data[0];
177 int i, j;
178
179 for (i = 0; i < avctx->height; i++) {
180 int size, left, code, pix;
181 uint16_t *out = (uint16_t *)outdata;
182 int pos = 0;
183
184 /* size of packed line */
185 size = left = bytestream2_get_be16(gbc);
186 if (bytestream2_get_bytes_left(gbc) < size)
187 return AVERROR_INVALIDDATA;
188
189 /* decode line */
190 while (left > 0) {
191 code = bytestream2_get_byte(gbc);
192 if (code & 0x80 ) { /* run */
193 pix = bytestream2_get_be16(gbc);
194 for (j = 0; j < 257 - code; j++) {
195 if (pos < offset) {
196 out[pos++] = pix;
197 }
198 }
199 left -= 3;
200 } else { /* copy */
201 for (j = 0; j < code + 1; j++) {
202 if (pos < offset) {
203 out[pos++] = bytestream2_get_be16(gbc);
204 } else {
205 bytestream2_skip(gbc, 2);
206 }
207 }
208 left -= 1 + (code + 1) * 2;
209 }
210 }
211 outdata += p->linesize[0];
212 }
213 return 0;
214 }
215
216 15 static int decode_rle(AVCodecContext *avctx, AVFrame *p, GetByteContext *gbc,
217 int step)
218 {
219 int i, j;
220 15 int offset = avctx->width * step;
221 15 uint8_t *outdata = p->data[0];
222
223
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6383 for (i = 0; i < avctx->height; i++) {
224 int size, left, code, pix;
225 6368 uint8_t *out = outdata;
226 6368 int pos = 0;
227
228 /* size of packed line */
229 6368 size = left = bytestream2_get_be16(gbc);
230
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6368 if (bytestream2_get_bytes_left(gbc) < size)
231 return AVERROR_INVALIDDATA;
232
233 /* decode line */
234
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477937 while (left > 0) {
235 471569 code = bytestream2_get_byte(gbc);
236
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471569 if (code & 0x80 ) { /* run */
237 246815 pix = bytestream2_get_byte(gbc);
238
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1602325 for (j = 0; j < 257 - code; j++) {
239
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1355510 if (pos < offset)
240 1355510 out[pos] = pix;
241 1355510 pos += step;
242
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1355510 if (pos >= offset && step > 1) {
243 384 pos -= offset;
244 384 pos++;
245 }
246 }
247 246815 left -= 2;
248 } else { /* copy */
249
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2961148 for (j = 0; j < code + 1; j++) {
250 2736394 pix = bytestream2_get_byte(gbc);
251
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2736394 if (pos < offset)
252 2736394 out[pos] = pix;
253 2736394 pos += step;
254
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2736394 if (pos >= offset && step > 1) {
255 pos -= offset;
256 pos++;
257 }
258 }
259 224754 left -= 2 + code;
260 }
261 }
262 6368 outdata += p->linesize[0];
263 }
264 15 return 0;
265 }
266
267 40 static int check_header(const char *buf, int buf_size)
268 {
269 unsigned w, h, v0, v1;
270
271
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40 if (buf_size < 40)
272 return 0;
273
274 40 w = AV_RB16(buf+6);
275 40 h = AV_RB16(buf+8);
276 40 v0 = AV_RB16(buf+10);
277 40 v1 = AV_RB16(buf+12);
278
279
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40 if (!w || !h)
280 return 0;
281
282
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40 if (v0 == 0x1101)
283 return 1;
284
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40 if (v0 == 0x0011 && v1 == 0x02FF)
285 20 return 2;
286 20 return 0;
287 }
288
289
290 20 static int decode_frame(AVCodecContext *avctx,
291 void *data, int *got_frame,
292 AVPacket *avpkt)
293 {
294 20 AVFrame * const p = data;
295 GetByteContext gbc;
296 int colors;
297 int w, h, ret;
298 int ver;
299
300 20 bytestream2_init(&gbc, avpkt->data, avpkt->size);
301
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20 if ( bytestream2_get_bytes_left(&gbc) >= 552
302
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20 && check_header(gbc.buffer + 512, bytestream2_get_bytes_left(&gbc) - 512)
303 )
304 bytestream2_skip(&gbc, 512);
305
306 20 ver = check_header(gbc.buffer, bytestream2_get_bytes_left(&gbc));
307
308 /* smallest PICT header */
309
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20 if (bytestream2_get_bytes_left(&gbc) < 40) {
310 av_log(avctx, AV_LOG_ERROR, "Frame is too small %d\n",
311 bytestream2_get_bytes_left(&gbc));
312 return AVERROR_INVALIDDATA;
313 }
314
315 20 bytestream2_skip(&gbc, 6);
316 20 h = bytestream2_get_be16(&gbc);
317 20 w = bytestream2_get_be16(&gbc);
318
319 20 ret = ff_set_dimensions(avctx, w, h);
320
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20 if (ret < 0)
321 return ret;
322
323 /* version 1 is identified by 0x1101
324 * it uses byte-aligned opcodes rather than word-aligned */
325
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20 if (ver == 1) {
326 avpriv_request_sample(avctx, "QuickDraw version 1");
327 return AVERROR_PATCHWELCOME;
328
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20 } else if (ver != 2) {
329 avpriv_request_sample(avctx, "QuickDraw version unknown (%X)", bytestream2_get_be32(&gbc));
330 return AVERROR_PATCHWELCOME;
331 }
332
333 20 bytestream2_skip(&gbc, 4+26);
334
335
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715 while (bytestream2_get_bytes_left(&gbc) >= 4) {
336 int bppcnt, bpp;
337 int rowbytes, pack_type;
338 int flags;
339 710 int opcode = bytestream2_get_be16(&gbc);
340
341
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710 switch(opcode) {
342 30 case CLIP:
343 30 bytestream2_skip(&gbc, 10);
344 30 break;
345 13 case PACKBITSRECT:
346 case PACKBITSRGN:
347 13 av_log(avctx, AV_LOG_DEBUG, "Parsing Packbit opcode\n");
348
349 13 flags = bytestream2_get_be16(&gbc) & 0xC000;
350 13 bytestream2_skip(&gbc, 28);
351 13 bppcnt = bytestream2_get_be16(&gbc); /* cmpCount */
352 13 bpp = bytestream2_get_be16(&gbc); /* cmpSize */
353
354 13 av_log(avctx, AV_LOG_DEBUG, "bppcount %d bpp %d\n", bppcnt, bpp);
355
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13 if (bppcnt == 1 && bpp == 8) {
356 13 avctx->pix_fmt = AV_PIX_FMT_PAL8;
357 } else if (bppcnt == 1 && (bpp == 4 || bpp == 2)) {
358 avctx->pix_fmt = AV_PIX_FMT_PAL8;
359 } else if (bppcnt == 3 && bpp == 5) {
360 avctx->pix_fmt = AV_PIX_FMT_RGB555;
361 } else {
362 av_log(avctx, AV_LOG_ERROR,
363 "Invalid pixel format (bppcnt %d bpp %d) in Packbit\n",
364 bppcnt, bpp);
365 return AVERROR_INVALIDDATA;
366 }
367
368 /* jump to palette */
369 13 bytestream2_skip(&gbc, 18);
370 13 colors = bytestream2_get_be16(&gbc);
371
372
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13 if (colors < 0 || colors > 256) {
373 av_log(avctx, AV_LOG_ERROR,
374 "Error color count - %i(0x%X)\n", colors, colors);
375 return AVERROR_INVALIDDATA;
376 }
377
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13 if (bytestream2_get_bytes_left(&gbc) < (colors + 1) * 8) {
378 av_log(avctx, AV_LOG_ERROR, "Palette is too small %d\n",
379 bytestream2_get_bytes_left(&gbc));
380 return AVERROR_INVALIDDATA;
381 }
382
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13 if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
383 return ret;
384
385 13 ret = parse_palette(avctx, &gbc, (uint32_t *)p->data[1], colors, flags & 0x8000);
386
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13 if (ret < 0)
387 return ret;
388 13 p->palette_has_changed = 1;
389
390 /* jump to image data */
391 13 bytestream2_skip(&gbc, 18);
392
393
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13 if (opcode == PACKBITSRGN) {
394 bytestream2_skip(&gbc, 2 + 8); /* size + rect */
395 avpriv_report_missing_feature(avctx, "Packbit mask region");
396 }
397
398
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13 if (avctx->pix_fmt == AV_PIX_FMT_RGB555)
399 ret = decode_rle16(avctx, p, &gbc);
400
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13 else if (bpp == 2)
401 ret = decode_rle_bpp2(avctx, p, &gbc);
402
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13 else if (bpp == 4)
403 ret = decode_rle_bpp4(avctx, p, &gbc);
404 else
405 13 ret = decode_rle(avctx, p, &gbc, bppcnt);
406
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13 if (ret < 0)
407 return ret;
408 13 *got_frame = 1;
409 13 break;
410 2 case DIRECTBITSRECT:
411 case DIRECTBITSRGN:
412 2 av_log(avctx, AV_LOG_DEBUG, "Parsing Directbit opcode\n");
413
414 2 bytestream2_skip(&gbc, 4);
415 2 rowbytes = bytestream2_get_be16(&gbc) & 0x3FFF;
416
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2 if (rowbytes <= 250) {
417 avpriv_report_missing_feature(avctx, "Short rowbytes");
418 return AVERROR_PATCHWELCOME;
419 }
420
421 2 bytestream2_skip(&gbc, 4);
422 2 h = bytestream2_get_be16(&gbc);
423 2 w = bytestream2_get_be16(&gbc);
424 2 bytestream2_skip(&gbc, 2);
425
426 2 ret = ff_set_dimensions(avctx, w, h);
427
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2 if (ret < 0)
428 return ret;
429
430 2 pack_type = bytestream2_get_be16(&gbc);
431
432 2 bytestream2_skip(&gbc, 16);
433 2 bppcnt = bytestream2_get_be16(&gbc); /* cmpCount */
434 2 bpp = bytestream2_get_be16(&gbc); /* cmpSize */
435
436 2 av_log(avctx, AV_LOG_DEBUG, "bppcount %d bpp %d\n", bppcnt, bpp);
437
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2 if (bppcnt == 3 && bpp == 8) {
438 2 avctx->pix_fmt = AV_PIX_FMT_RGB24;
439 } else if (bppcnt == 3 && bpp == 5 || bppcnt == 2 && bpp == 8) {
440 avctx->pix_fmt = AV_PIX_FMT_RGB555;
441 } else if (bppcnt == 4 && bpp == 8) {
442 avctx->pix_fmt = AV_PIX_FMT_ARGB;
443 } else {
444 av_log(avctx, AV_LOG_ERROR,
445 "Invalid pixel format (bppcnt %d bpp %d) in Directbit\n",
446 bppcnt, bpp);
447 return AVERROR_INVALIDDATA;
448 }
449
450 /* set packing when default is selected */
451
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2 if (pack_type == 0)
452 pack_type = bppcnt;
453
454
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2 if (pack_type != 3 && pack_type != 4) {
455 avpriv_request_sample(avctx, "Pack type %d", pack_type);
456 return AVERROR_PATCHWELCOME;
457 }
458
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2 if (bytestream2_get_bytes_left(&gbc) < 30)
459 return AVERROR_INVALIDDATA;
460
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2 if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
461 return ret;
462
463 /* jump to data */
464 2 bytestream2_skip(&gbc, 30);
465
466
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2 if (opcode == DIRECTBITSRGN) {
467 bytestream2_skip(&gbc, 2 + 8); /* size + rect */
468 avpriv_report_missing_feature(avctx, "DirectBit mask region");
469 }
470
471
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2 if (avctx->pix_fmt == AV_PIX_FMT_RGB555)
472 ret = decode_rle16(avctx, p, &gbc);
473 else
474 2 ret = decode_rle(avctx, p, &gbc, bppcnt);
475
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2 if (ret < 0)
476 return ret;
477 2 *got_frame = 1;
478 2 break;
479 10 case LONGCOMMENT:
480 10 bytestream2_get_be16(&gbc);
481 10 bytestream2_skip(&gbc, bytestream2_get_be16(&gbc));
482 10 break;
483 655 default:
484 655 av_log(avctx, AV_LOG_TRACE, "Unknown 0x%04X opcode\n", opcode);
485 655 break;
486 }
487 /* exit the loop when a known pixel block has been found */
488
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710 if (*got_frame) {
489 int eop, trail;
490
491 /* re-align to a word */
492 15 bytestream2_skip(&gbc, bytestream2_get_bytes_left(&gbc) % 2);
493
494 15 eop = bytestream2_get_be16(&gbc);
495 15 trail = bytestream2_get_bytes_left(&gbc);
496
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15 if (eop != EOP)
497 av_log(avctx, AV_LOG_WARNING,
498 "Missing end of picture opcode (found 0x%04X)\n", eop);
499
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15 if (trail)
500 av_log(avctx, AV_LOG_WARNING, "Got %d trailing bytes\n", trail);
501 15 break;
502 }
503 }
504
505
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20 if (*got_frame) {
506 15 p->pict_type = AV_PICTURE_TYPE_I;
507 15 p->key_frame = 1;
508
509 15 return avpkt->size;
510 } else {
511 5 av_log(avctx, AV_LOG_ERROR, "Frame contained no usable data\n");
512
513 5 return AVERROR_INVALIDDATA;
514 }
515 }
516
517 const AVCodec ff_qdraw_decoder = {
518 .name = "qdraw",
519 .long_name = NULL_IF_CONFIG_SMALL("Apple QuickDraw"),
520 .type = AVMEDIA_TYPE_VIDEO,
521 .id = AV_CODEC_ID_QDRAW,
522 .decode = decode_frame,
523 .capabilities = AV_CODEC_CAP_DR1,
524 };
525