FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/interplayvideo.c
Date: 2022-07-05 19:52:29
Exec Total Coverage
Lines: 453 629 72.0%
Branches: 259 366 70.8%
Line Branch Exec Source
1 /*
2 * Interplay MVE Video Decoder
3 * Copyright (C) 2003 The FFmpeg project
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 /**
23 * @file
24 * Interplay MVE Video Decoder by Mike Melanson (melanson@pcisys.net)
25 * For more information about the Interplay MVE format, visit:
26 * http://www.pcisys.net/~melanson/codecs/interplay-mve.txt
27 * This code is written in such a way that the identifiers match up
28 * with the encoding descriptions in the document.
29 *
30 * This decoder presently only supports a PAL8 output colorspace.
31 *
32 * An Interplay video frame consists of 2 parts: The decoding map and
33 * the video data. A demuxer must load these 2 parts together in a single
34 * buffer before sending it through the stream to this decoder.
35 */
36
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <string.h>
40
41 #include "libavutil/intreadwrite.h"
42
43 #define BITSTREAM_READER_LE
44 #include "avcodec.h"
45 #include "bytestream.h"
46 #include "codec_internal.h"
47 #include "decode.h"
48 #include "get_bits.h"
49 #include "hpeldsp.h"
50 #include "internal.h"
51
52 #define PALETTE_COUNT 256
53
54 typedef struct IpvideoContext {
55
56 AVCodecContext *avctx;
57 HpelDSPContext hdsp;
58 AVFrame *second_last_frame;
59 AVFrame *last_frame;
60
61 /* For format 0x10 */
62 AVFrame *cur_decode_frame;
63 AVFrame *prev_decode_frame;
64
65 const unsigned char *decoding_map;
66 int decoding_map_size;
67 const unsigned char *skip_map;
68 int skip_map_size;
69
70 int is_16bpp;
71 GetByteContext stream_ptr, mv_ptr;
72 unsigned char *pixel_ptr;
73 int line_inc;
74 int stride;
75 int upper_motion_limit_offset;
76
77 uint32_t pal[256];
78 } IpvideoContext;
79
80 341521 static int copy_from(IpvideoContext *s, AVFrame *src, AVFrame *dst, int delta_x, int delta_y)
81 {
82 341521 int width = dst->width;
83 341521 int current_offset = s->pixel_ptr - dst->data[0];
84 341521 int x = (current_offset % dst->linesize[0]) / (1 + s->is_16bpp);
85 341521 int y = current_offset / dst->linesize[0];
86 341521 int dx = delta_x + x - ((delta_x + x >= width) - (delta_x + x < 0)) * width;
87 341521 int dy = delta_y + y + (delta_x + x >= width) - (delta_x + x < 0);
88 341521 int motion_offset = dy * src->linesize[0] + dx * (1 + s->is_16bpp);
89
90
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 341521 if (motion_offset < 0) {
91 ✗ av_log(s->avctx, AV_LOG_ERROR, "motion offset < 0 (%d)\n", motion_offset);
92 ✗ return AVERROR_INVALIDDATA;
93
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 341521 } else if (motion_offset > s->upper_motion_limit_offset) {
94 ✗ av_log(s->avctx, AV_LOG_ERROR, "motion offset above limit (%d >= %d)\n",
95 motion_offset, s->upper_motion_limit_offset);
96 ✗ return AVERROR_INVALIDDATA;
97 }
98
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 341521 if (!src->data[0]) {
99 ✗ av_log(s->avctx, AV_LOG_ERROR, "Invalid decode type, corrupted header?\n");
100 ✗ return AVERROR(EINVAL);
101 }
102 341521 s->hdsp.put_pixels_tab[!s->is_16bpp][0](s->pixel_ptr, src->data[0] + motion_offset,
103 341521 dst->linesize[0], 8);
104 341521 return 0;
105 }
106
107 34551 static int ipvideo_decode_block_opcode_0x0(IpvideoContext *s, AVFrame *frame)
108 {
109 34551 return copy_from(s, s->last_frame, frame, 0, 0);
110 }
111
112 280419 static int ipvideo_decode_block_opcode_0x1(IpvideoContext *s, AVFrame *frame)
113 {
114 280419 return copy_from(s, s->second_last_frame, frame, 0, 0);
115 }
116
117 1282 static int ipvideo_decode_block_opcode_0x2(IpvideoContext *s, AVFrame *frame)
118 {
119 unsigned char B;
120 int x, y;
121
122 /* copy block from 2 frames ago using a motion vector; need 1 more byte */
123
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 1282 if (!s->is_16bpp) {
124 579 B = bytestream2_get_byte(&s->stream_ptr);
125 } else {
126 703 B = bytestream2_get_byte(&s->mv_ptr);
127 }
128
129
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 1282 if (B < 56) {
130 491 x = 8 + (B % 7);
131 491 y = B / 7;
132 } else {
133 791 x = -14 + ((B - 56) % 29);
134 791 y = 8 + ((B - 56) / 29);
135 }
136
137 ff_tlog(s->avctx, "motion byte = %d, (x, y) = (%d, %d)\n", B, x, y);
138 1282 return copy_from(s, s->second_last_frame, frame, x, y);
139 }
140
141 3043 static int ipvideo_decode_block_opcode_0x3(IpvideoContext *s, AVFrame *frame)
142 {
143 unsigned char B;
144 int x, y;
145
146 /* copy 8x8 block from current frame from an up/left block */
147
148 /* need 1 more byte for motion */
149
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 3043 if (!s->is_16bpp) {
150 387 B = bytestream2_get_byte(&s->stream_ptr);
151 } else {
152 2656 B = bytestream2_get_byte(&s->mv_ptr);
153 }
154
155
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 3043 if (B < 56) {
156 1630 x = -(8 + (B % 7));
157 1630 y = -(B / 7);
158 } else {
159 1413 x = -(-14 + ((B - 56) % 29));
160 1413 y = -( 8 + ((B - 56) / 29));
161 }
162
163 ff_tlog(s->avctx, "motion byte = %d, (x, y) = (%d, %d)\n", B, x, y);
164 3043 return copy_from(s, frame, frame, x, y);
165 }
166
167 18863 static int ipvideo_decode_block_opcode_0x4(IpvideoContext *s, AVFrame *frame)
168 {
169 int x, y;
170 unsigned char B, BL, BH;
171
172 /* copy a block from the previous frame; need 1 more byte */
173
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 18863 if (!s->is_16bpp) {
174 6043 B = bytestream2_get_byte(&s->stream_ptr);
175 } else {
176 12820 B = bytestream2_get_byte(&s->mv_ptr);
177 }
178
179 18863 BL = B & 0x0F;
180 18863 BH = (B >> 4) & 0x0F;
181 18863 x = -8 + BL;
182 18863 y = -8 + BH;
183
184 ff_tlog(s->avctx, "motion byte = %d, (x, y) = (%d, %d)\n", B, x, y);
185 18863 return copy_from(s, s->last_frame, frame, x, y);
186 }
187
188 3363 static int ipvideo_decode_block_opcode_0x5(IpvideoContext *s, AVFrame *frame)
189 {
190 signed char x, y;
191
192 /* copy a block from the previous frame using an expanded range;
193 * need 2 more bytes */
194 3363 x = bytestream2_get_byte(&s->stream_ptr);
195 3363 y = bytestream2_get_byte(&s->stream_ptr);
196
197 ff_tlog(s->avctx, "motion bytes = %d, %d\n", x, y);
198 3363 return copy_from(s, s->last_frame, frame, x, y);
199 }
200
201 ✗ static int ipvideo_decode_block_opcode_0x6(IpvideoContext *s, AVFrame *frame)
202 {
203 /* mystery opcode? skip multiple blocks? */
204 ✗ av_log(s->avctx, AV_LOG_ERROR, "Help! Mystery opcode 0x6 seen\n");
205
206 /* report success */
207 ✗ return 0;
208 }
209
210 815 static int ipvideo_decode_block_opcode_0x7(IpvideoContext *s, AVFrame *frame)
211 {
212 int x, y;
213 unsigned char P[2];
214 unsigned int flags;
215
216
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 815 if (bytestream2_get_bytes_left(&s->stream_ptr) < 4) {
217 ✗ av_log(s->avctx, AV_LOG_ERROR, "too little data for opcode 0x7\n");
218 ✗ return AVERROR_INVALIDDATA;
219 }
220
221 /* 2-color encoding */
222 815 P[0] = bytestream2_get_byte(&s->stream_ptr);
223 815 P[1] = bytestream2_get_byte(&s->stream_ptr);
224
225
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 815 if (P[0] <= P[1]) {
226
227 /* need 8 more bytes from the stream */
228
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 6471 for (y = 0; y < 8; y++) {
229 5752 flags = bytestream2_get_byte(&s->stream_ptr) | 0x100;
230
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 51768 for (; flags != 1; flags >>= 1)
231 46016 *s->pixel_ptr++ = P[flags & 1];
232 5752 s->pixel_ptr += s->line_inc;
233 }
234
235 } else {
236
237 /* need 2 more bytes from the stream */
238 96 flags = bytestream2_get_le16(&s->stream_ptr);
239
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 480 for (y = 0; y < 8; y += 2) {
240
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 1920 for (x = 0; x < 8; x += 2, flags >>= 1) {
241 1536 s->pixel_ptr[x ] =
242 1536 s->pixel_ptr[x + 1 ] =
243 1536 s->pixel_ptr[x + s->stride] =
244 1536 s->pixel_ptr[x + 1 + s->stride] = P[flags & 1];
245 }
246 384 s->pixel_ptr += s->stride * 2;
247 }
248 }
249
250 /* report success */
251 815 return 0;
252 }
253
254 1013 static int ipvideo_decode_block_opcode_0x8(IpvideoContext *s, AVFrame *frame)
255 {
256 int x, y;
257 unsigned char P[4];
258 1013 unsigned int flags = 0;
259
260
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 1013 if (bytestream2_get_bytes_left(&s->stream_ptr) < 12) {
261 ✗ av_log(s->avctx, AV_LOG_ERROR, "too little data for opcode 0x8\n");
262 ✗ return AVERROR_INVALIDDATA;
263 }
264
265 /* 2-color encoding for each 4x4 quadrant, or 2-color encoding on
266 * either top and bottom or left and right halves */
267 1013 P[0] = bytestream2_get_byte(&s->stream_ptr);
268 1013 P[1] = bytestream2_get_byte(&s->stream_ptr);
269
270
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 1013 if (P[0] <= P[1]) {
271
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 5627 for (y = 0; y < 16; y++) {
272 // new values for each 4x4 block
273
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 5296 if (!(y & 3)) {
274
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 1324 if (y) {
275 993 P[0] = bytestream2_get_byte(&s->stream_ptr);
276 993 P[1] = bytestream2_get_byte(&s->stream_ptr);
277 }
278 1324 flags = bytestream2_get_le16(&s->stream_ptr);
279 }
280
281
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 26480 for (x = 0; x < 4; x++, flags >>= 1)
282 21184 *s->pixel_ptr++ = P[flags & 1];
283 5296 s->pixel_ptr += s->stride - 4;
284 // switch to right half
285
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 5296 if (y == 7) s->pixel_ptr -= 8 * s->stride - 4;
286 }
287
288 } else {
289 682 flags = bytestream2_get_le32(&s->stream_ptr);
290 682 P[2] = bytestream2_get_byte(&s->stream_ptr);
291 682 P[3] = bytestream2_get_byte(&s->stream_ptr);
292
293
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 682 if (P[2] <= P[3]) {
294
295 /* vertical split; left & right halves are 2-color encoded */
296
297
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 6919 for (y = 0; y < 16; y++) {
298
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 32560 for (x = 0; x < 4; x++, flags >>= 1)
299 26048 *s->pixel_ptr++ = P[flags & 1];
300 6512 s->pixel_ptr += s->stride - 4;
301 // switch to right half
302
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 6512 if (y == 7) {
303 407 s->pixel_ptr -= 8 * s->stride - 4;
304 407 P[0] = P[2];
305 407 P[1] = P[3];
306 407 flags = bytestream2_get_le32(&s->stream_ptr);
307 }
308 }
309
310 } else {
311
312 /* horizontal split; top & bottom halves are 2-color encoded */
313
314
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 2475 for (y = 0; y < 8; y++) {
315
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 2200 if (y == 4) {
316 275 P[0] = P[2];
317 275 P[1] = P[3];
318 275 flags = bytestream2_get_le32(&s->stream_ptr);
319 }
320
321
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 19800 for (x = 0; x < 8; x++, flags >>= 1)
322 17600 *s->pixel_ptr++ = P[flags & 1];
323 2200 s->pixel_ptr += s->line_inc;
324 }
325 }
326 }
327
328 /* report success */
329 1013 return 0;
330 }
331
332 2412 static int ipvideo_decode_block_opcode_0x9(IpvideoContext *s, AVFrame *frame)
333 {
334 int x, y;
335 unsigned char P[4];
336
337
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 2412 if (bytestream2_get_bytes_left(&s->stream_ptr) < 8) {
338 ✗ av_log(s->avctx, AV_LOG_ERROR, "too little data for opcode 0x9\n");
339 ✗ return AVERROR_INVALIDDATA;
340 }
341
342 /* 4-color encoding */
343 2412 bytestream2_get_buffer(&s->stream_ptr, P, 4);
344
345
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 2412 if (P[0] <= P[1]) {
346
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 2053 if (P[2] <= P[3]) {
347
348 /* 1 of 4 colors for each pixel, need 16 more bytes */
349
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 16515 for (y = 0; y < 8; y++) {
350 /* get the next set of 8 2-bit flags */
351 14680 int flags = bytestream2_get_le16(&s->stream_ptr);
352
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 132120 for (x = 0; x < 8; x++, flags >>= 2)
353 117440 *s->pixel_ptr++ = P[flags & 0x03];
354 14680 s->pixel_ptr += s->line_inc;
355 }
356
357 } else {
358 uint32_t flags;
359
360 /* 1 of 4 colors for each 2x2 block, need 4 more bytes */
361 218 flags = bytestream2_get_le32(&s->stream_ptr);
362
363
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 1090 for (y = 0; y < 8; y += 2) {
364
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 4360 for (x = 0; x < 8; x += 2, flags >>= 2) {
365 3488 s->pixel_ptr[x ] =
366 3488 s->pixel_ptr[x + 1 ] =
367 3488 s->pixel_ptr[x + s->stride] =
368 3488 s->pixel_ptr[x + 1 + s->stride] = P[flags & 0x03];
369 }
370 872 s->pixel_ptr += s->stride * 2;
371 }
372
373 }
374 } else {
375 uint64_t flags;
376
377 /* 1 of 4 colors for each 2x1 or 1x2 block, need 8 more bytes */
378 359 flags = bytestream2_get_le64(&s->stream_ptr);
379
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 359 if (P[2] <= P[3]) {
380
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 1755 for (y = 0; y < 8; y++) {
381
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 7800 for (x = 0; x < 8; x += 2, flags >>= 2) {
382 6240 s->pixel_ptr[x ] =
383 6240 s->pixel_ptr[x + 1] = P[flags & 0x03];
384 }
385 1560 s->pixel_ptr += s->stride;
386 }
387 } else {
388
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 820 for (y = 0; y < 8; y += 2) {
389
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 5904 for (x = 0; x < 8; x++, flags >>= 2) {
390 5248 s->pixel_ptr[x ] =
391 5248 s->pixel_ptr[x + s->stride] = P[flags & 0x03];
392 }
393 656 s->pixel_ptr += s->stride * 2;
394 }
395 }
396 }
397
398 /* report success */
399 2412 return 0;
400 }
401
402 5451 static int ipvideo_decode_block_opcode_0xA(IpvideoContext *s, AVFrame *frame)
403 {
404 int x, y;
405 unsigned char P[8];
406 5451 int flags = 0;
407
408
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 5451 if (bytestream2_get_bytes_left(&s->stream_ptr) < 16) {
409 ✗ av_log(s->avctx, AV_LOG_ERROR, "too little data for opcode 0xA\n");
410 ✗ return AVERROR_INVALIDDATA;
411 }
412
413 5451 bytestream2_get_buffer(&s->stream_ptr, P, 4);
414
415 /* 4-color encoding for each 4x4 quadrant, or 4-color encoding on
416 * either top and bottom or left and right halves */
417
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 5451 if (P[0] <= P[1]) {
418
419 /* 4-color encoding for each quadrant; need 32 bytes */
420
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 32419 for (y = 0; y < 16; y++) {
421 // new values for each 4x4 block
422
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 30512 if (!(y & 3)) {
423
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 7628 if (y) bytestream2_get_buffer(&s->stream_ptr, P, 4);
424 7628 flags = bytestream2_get_le32(&s->stream_ptr);
425 }
426
427
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 152560 for (x = 0; x < 4; x++, flags >>= 2)
428 122048 *s->pixel_ptr++ = P[flags & 0x03];
429
430 30512 s->pixel_ptr += s->stride - 4;
431 // switch to right half
432
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 30512 if (y == 7) s->pixel_ptr -= 8 * s->stride - 4;
433 }
434
435 } else {
436 // vertical split?
437 int vert;
438 3544 uint64_t flags = bytestream2_get_le64(&s->stream_ptr);
439
440 3544 bytestream2_get_buffer(&s->stream_ptr, P + 4, 4);
441 3544 vert = P[4] <= P[5];
442
443 /* 4-color encoding for either left and right or top and bottom
444 * halves */
445
446
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 60248 for (y = 0; y < 16; y++) {
447
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 283520 for (x = 0; x < 4; x++, flags >>= 2)
448 226816 *s->pixel_ptr++ = P[flags & 0x03];
449
450
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 56704 if (vert) {
451 30576 s->pixel_ptr += s->stride - 4;
452 // switch to right half
453
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 30576 if (y == 7) s->pixel_ptr -= 8 * s->stride - 4;
454
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 26128 } else if (y & 1) s->pixel_ptr += s->line_inc;
455
456 // load values for second half
457
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 56704 if (y == 7) {
458 3544 memcpy(P, P + 4, 4);
459 3544 flags = bytestream2_get_le64(&s->stream_ptr);
460 }
461 }
462 }
463
464 /* report success */
465 5451 return 0;
466 }
467
468 21074 static int ipvideo_decode_block_opcode_0xB(IpvideoContext *s, AVFrame *frame)
469 {
470 int y;
471
472 /* 64-color encoding (each pixel in block is a different color) */
473
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 189666 for (y = 0; y < 8; y++) {
474 168592 bytestream2_get_buffer(&s->stream_ptr, s->pixel_ptr, 8);
475 168592 s->pixel_ptr += s->stride;
476 }
477
478 /* report success */
479 21074 return 0;
480 }
481
482 135 static int ipvideo_decode_block_opcode_0xC(IpvideoContext *s, AVFrame *frame)
483 {
484 int x, y;
485
486 /* 16-color block encoding: each 2x2 block is a different color */
487
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 675 for (y = 0; y < 8; y += 2) {
488
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 2700 for (x = 0; x < 8; x += 2) {
489 2160 s->pixel_ptr[x ] =
490 2160 s->pixel_ptr[x + 1 ] =
491 2160 s->pixel_ptr[x + s->stride] =
492 2160 s->pixel_ptr[x + 1 + s->stride] = bytestream2_get_byte(&s->stream_ptr);
493 }
494 540 s->pixel_ptr += s->stride * 2;
495 }
496
497 /* report success */
498 135 return 0;
499 }
500
501 49 static int ipvideo_decode_block_opcode_0xD(IpvideoContext *s, AVFrame *frame)
502 {
503 int y;
504 unsigned char P[2];
505
506
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 49 if (bytestream2_get_bytes_left(&s->stream_ptr) < 4) {
507 ✗ av_log(s->avctx, AV_LOG_ERROR, "too little data for opcode 0xD\n");
508 ✗ return AVERROR_INVALIDDATA;
509 }
510
511 /* 4-color block encoding: each 4x4 block is a different color */
512
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 441 for (y = 0; y < 8; y++) {
513
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 392 if (!(y & 3)) {
514 98 P[0] = bytestream2_get_byte(&s->stream_ptr);
515 98 P[1] = bytestream2_get_byte(&s->stream_ptr);
516 }
517 392 memset(s->pixel_ptr, P[0], 4);
518 392 memset(s->pixel_ptr + 4, P[1], 4);
519 392 s->pixel_ptr += s->stride;
520 }
521
522 /* report success */
523 49 return 0;
524 }
525
526 1696 static int ipvideo_decode_block_opcode_0xE(IpvideoContext *s, AVFrame *frame)
527 {
528 int y;
529 unsigned char pix;
530
531 /* 1-color encoding: the whole block is 1 solid color */
532 1696 pix = bytestream2_get_byte(&s->stream_ptr);
533
534
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 15264 for (y = 0; y < 8; y++) {
535 13568 memset(s->pixel_ptr, pix, 8);
536 13568 s->pixel_ptr += s->stride;
537 }
538
539 /* report success */
540 1696 return 0;
541 }
542
543 27 static int ipvideo_decode_block_opcode_0xF(IpvideoContext *s, AVFrame *frame)
544 {
545 int x, y;
546 unsigned char sample[2];
547
548 /* dithered encoding */
549 27 sample[0] = bytestream2_get_byte(&s->stream_ptr);
550 27 sample[1] = bytestream2_get_byte(&s->stream_ptr);
551
552
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 243 for (y = 0; y < 8; y++) {
553
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 1080 for (x = 0; x < 8; x += 2) {
554 864 *s->pixel_ptr++ = sample[ y & 1 ];
555 864 *s->pixel_ptr++ = sample[!(y & 1)];
556 }
557 216 s->pixel_ptr += s->line_inc;
558 }
559
560 /* report success */
561 27 return 0;
562 }
563
564 ✗ static int ipvideo_decode_block_opcode_0x6_16(IpvideoContext *s, AVFrame *frame)
565 {
566 signed char x, y;
567
568 /* copy a block from the second last frame using an expanded range */
569 ✗ x = bytestream2_get_byte(&s->stream_ptr);
570 ✗ y = bytestream2_get_byte(&s->stream_ptr);
571
572 ff_tlog(s->avctx, "motion bytes = %d, %d\n", x, y);
573 ✗ return copy_from(s, s->second_last_frame, frame, x, y);
574 }
575
576 2197 static int ipvideo_decode_block_opcode_0x7_16(IpvideoContext *s, AVFrame *frame)
577 {
578 int x, y;
579 uint16_t P[2];
580 unsigned int flags;
581 2197 uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
582
583 /* 2-color encoding */
584 2197 P[0] = bytestream2_get_le16(&s->stream_ptr);
585 2197 P[1] = bytestream2_get_le16(&s->stream_ptr);
586
587
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 2197 if (!(P[0] & 0x8000)) {
588
589
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 14823 for (y = 0; y < 8; y++) {
590 13176 flags = bytestream2_get_byte(&s->stream_ptr) | 0x100;
591
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 118584 for (; flags != 1; flags >>= 1)
592 105408 *pixel_ptr++ = P[flags & 1];
593 13176 pixel_ptr += s->line_inc;
594 }
595
596 } else {
597
598 550 flags = bytestream2_get_le16(&s->stream_ptr);
599
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600
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 11000 for (x = 0; x < 8; x += 2, flags >>= 1) {
601 8800 pixel_ptr[x ] =
602 8800 pixel_ptr[x + 1 ] =
603 8800 pixel_ptr[x + s->stride] =
604 8800 pixel_ptr[x + 1 + s->stride] = P[flags & 1];
605 }
606 2200 pixel_ptr += s->stride * 2;
607 }
608 }
609
610 2197 return 0;
611 }
612
613 1478 static int ipvideo_decode_block_opcode_0x8_16(IpvideoContext *s, AVFrame *frame)
614 {
615 int x, y;
616 uint16_t P[4];
617 1478 unsigned int flags = 0;
618 1478 uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
619
620 /* 2-color encoding for each 4x4 quadrant, or 2-color encoding on
621 * either top and bottom or left and right halves */
622 1478 P[0] = bytestream2_get_le16(&s->stream_ptr);
623 1478 P[1] = bytestream2_get_le16(&s->stream_ptr);
624
625
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 1478 if (!(P[0] & 0x8000)) {
626
627
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 4522 for (y = 0; y < 16; y++) {
628 // new values for each 4x4 block
629
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 4256 if (!(y & 3)) {
630
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 1064 if (y) {
631 798 P[0] = bytestream2_get_le16(&s->stream_ptr);
632 798 P[1] = bytestream2_get_le16(&s->stream_ptr);
633 }
634 1064 flags = bytestream2_get_le16(&s->stream_ptr);
635 }
636
637
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 21280 for (x = 0; x < 4; x++, flags >>= 1)
638 17024 *pixel_ptr++ = P[flags & 1];
639 4256 pixel_ptr += s->stride - 4;
640 // switch to right half
641
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 4256 if (y == 7) pixel_ptr -= 8 * s->stride - 4;
642 }
643
644 } else {
645
646 1212 flags = bytestream2_get_le32(&s->stream_ptr);
647 1212 P[2] = bytestream2_get_le16(&s->stream_ptr);
648 1212 P[3] = bytestream2_get_le16(&s->stream_ptr);
649
650
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 1212 if (!(P[2] & 0x8000)) {
651
652 /* vertical split; left & right halves are 2-color encoded */
653
654
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 6834 for (y = 0; y < 16; y++) {
655
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 32160 for (x = 0; x < 4; x++, flags >>= 1)
656 25728 *pixel_ptr++ = P[flags & 1];
657 6432 pixel_ptr += s->stride - 4;
658 // switch to right half
659
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 6432 if (y == 7) {
660 402 pixel_ptr -= 8 * s->stride - 4;
661 402 P[0] = P[2];
662 402 P[1] = P[3];
663 402 flags = bytestream2_get_le32(&s->stream_ptr);
664 }
665 }
666
667 } else {
668
669 /* horizontal split; top & bottom halves are 2-color encoded */
670
671
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 7290 for (y = 0; y < 8; y++) {
672
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 6480 if (y == 4) {
673 810 P[0] = P[2];
674 810 P[1] = P[3];
675 810 flags = bytestream2_get_le32(&s->stream_ptr);
676 }
677
678
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 58320 for (x = 0; x < 8; x++, flags >>= 1)
679 51840 *pixel_ptr++ = P[flags & 1];
680 6480 pixel_ptr += s->line_inc;
681 }
682 }
683 }
684
685 /* report success */
686 1478 return 0;
687 }
688
689 6526 static int ipvideo_decode_block_opcode_0x9_16(IpvideoContext *s, AVFrame *frame)
690 {
691 int x, y;
692 uint16_t P[4];
693 6526 uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
694
695 /* 4-color encoding */
696
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 32630 for (x = 0; x < 4; x++)
697 26104 P[x] = bytestream2_get_le16(&s->stream_ptr);
698
699
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 6526 if (!(P[0] & 0x8000)) {
700
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 2987 if (!(P[2] & 0x8000)) {
701
702 /* 1 of 4 colors for each pixel */
703
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 25947 for (y = 0; y < 8; y++) {
704 /* get the next set of 8 2-bit flags */
705 23064 int flags = bytestream2_get_le16(&s->stream_ptr);
706
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 207576 for (x = 0; x < 8; x++, flags >>= 2)
707 184512 *pixel_ptr++ = P[flags & 0x03];
708 23064 pixel_ptr += s->line_inc;
709 }
710
711 } else {
712 uint32_t flags;
713
714 /* 1 of 4 colors for each 2x2 block */
715 104 flags = bytestream2_get_le32(&s->stream_ptr);
716
717
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 520 for (y = 0; y < 8; y += 2) {
718
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 2080 for (x = 0; x < 8; x += 2, flags >>= 2) {
719 1664 pixel_ptr[x ] =
720 1664 pixel_ptr[x + 1 ] =
721 1664 pixel_ptr[x + s->stride] =
722 1664 pixel_ptr[x + 1 + s->stride] = P[flags & 0x03];
723 }
724 416 pixel_ptr += s->stride * 2;
725 }
726
727 }
728 } else {
729 uint64_t flags;
730
731 /* 1 of 4 colors for each 2x1 or 1x2 block */
732 3539 flags = bytestream2_get_le64(&s->stream_ptr);
733
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 3539 if (!(P[2] & 0x8000)) {
734
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 25371 for (y = 0; y < 8; y++) {
735
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 112760 for (x = 0; x < 8; x += 2, flags >>= 2) {
736 90208 pixel_ptr[x ] =
737 90208 pixel_ptr[x + 1] = P[flags & 0x03];
738 }
739 22552 pixel_ptr += s->stride;
740 }
741 } else {
742
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 3600 for (y = 0; y < 8; y += 2) {
743
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 25920 for (x = 0; x < 8; x++, flags >>= 2) {
744 23040 pixel_ptr[x ] =
745 23040 pixel_ptr[x + s->stride] = P[flags & 0x03];
746 }
747 2880 pixel_ptr += s->stride * 2;
748 }
749 }
750 }
751
752 /* report success */
753 6526 return 0;
754 }
755
756 7914 static int ipvideo_decode_block_opcode_0xA_16(IpvideoContext *s, AVFrame *frame)
757 {
758 int x, y;
759 uint16_t P[8];
760 7914 int flags = 0;
761 7914 uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
762
763
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 39570 for (x = 0; x < 4; x++)
764 31656 P[x] = bytestream2_get_le16(&s->stream_ptr);
765
766 /* 4-color encoding for each 4x4 quadrant, or 4-color encoding on
767 * either top and bottom or left and right halves */
768
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 7914 if (!(P[0] & 0x8000)) {
769
770 /* 4-color encoding for each quadrant */
771
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 52530 for (y = 0; y < 16; y++) {
772 // new values for each 4x4 block
773
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 49440 if (!(y & 3)) {
774
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 12360 if (y)
775
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 46350 for (x = 0; x < 4; x++)
776 37080 P[x] = bytestream2_get_le16(&s->stream_ptr);
777 12360 flags = bytestream2_get_le32(&s->stream_ptr);
778 }
779
780
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 247200 for (x = 0; x < 4; x++, flags >>= 2)
781 197760 *pixel_ptr++ = P[flags & 0x03];
782
783 49440 pixel_ptr += s->stride - 4;
784 // switch to right half
785
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 49440 if (y == 7) pixel_ptr -= 8 * s->stride - 4;
786 }
787
788 } else {
789 // vertical split?
790 int vert;
791 4824 uint64_t flags = bytestream2_get_le64(&s->stream_ptr);
792
793
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 24120 for (x = 4; x < 8; x++)
794 19296 P[x] = bytestream2_get_le16(&s->stream_ptr);
795 4824 vert = !(P[4] & 0x8000);
796
797 /* 4-color encoding for either left and right or top and bottom
798 * halves */
799
800
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 82008 for (y = 0; y < 16; y++) {
801
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 385920 for (x = 0; x < 4; x++, flags >>= 2)
802 308736 *pixel_ptr++ = P[flags & 0x03];
803
804
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 77184 if (vert) {
805 26000 pixel_ptr += s->stride - 4;
806 // switch to right half
807
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 26000 if (y == 7) pixel_ptr -= 8 * s->stride - 4;
808
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 51184 } else if (y & 1) pixel_ptr += s->line_inc;
809
810 // load values for second half
811
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 77184 if (y == 7) {
812 4824 memcpy(P, P + 4, 8);
813 4824 flags = bytestream2_get_le64(&s->stream_ptr);
814 }
815 }
816 }
817
818 /* report success */
819 7914 return 0;
820 }
821
822 1690 static int ipvideo_decode_block_opcode_0xB_16(IpvideoContext *s, AVFrame *frame)
823 {
824 int x, y;
825 1690 uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
826
827 /* 64-color encoding (each pixel in block is a different color) */
828
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829
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 121680 for (x = 0; x < 8; x++)
830 108160 pixel_ptr[x] = bytestream2_get_le16(&s->stream_ptr);
831 13520 pixel_ptr += s->stride;
832 }
833
834 /* report success */
835 1690 return 0;
836 }
837
838 8 static int ipvideo_decode_block_opcode_0xC_16(IpvideoContext *s, AVFrame *frame)
839 {
840 int x, y;
841 8 uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
842
843 /* 16-color block encoding: each 2x2 block is a different color */
844
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 40 for (y = 0; y < 8; y += 2) {
845
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 160 for (x = 0; x < 8; x += 2) {
846 128 pixel_ptr[x ] =
847 128 pixel_ptr[x + 1 ] =
848 128 pixel_ptr[x + s->stride] =
849 128 pixel_ptr[x + 1 + s->stride] = bytestream2_get_le16(&s->stream_ptr);
850 }
851 32 pixel_ptr += s->stride * 2;
852 }
853
854 /* report success */
855 8 return 0;
856 }
857
858 38 static int ipvideo_decode_block_opcode_0xD_16(IpvideoContext *s, AVFrame *frame)
859 {
860 int x, y;
861 uint16_t P[2];
862 38 uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
863
864 /* 4-color block encoding: each 4x4 block is a different color */
865
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 342 for (y = 0; y < 8; y++) {
866
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 304 if (!(y & 3)) {
867 76 P[0] = bytestream2_get_le16(&s->stream_ptr);
868 76 P[1] = bytestream2_get_le16(&s->stream_ptr);
869 }
870
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 2736 for (x = 0; x < 8; x++)
871 2432 pixel_ptr[x] = P[x >> 2];
872 304 pixel_ptr += s->stride;
873 }
874
875 /* report success */
876 38 return 0;
877 }
878
879 3556 static int ipvideo_decode_block_opcode_0xE_16(IpvideoContext *s, AVFrame *frame)
880 {
881 int x, y;
882 uint16_t pix;
883 3556 uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
884
885 /* 1-color encoding: the whole block is 1 solid color */
886 3556 pix = bytestream2_get_le16(&s->stream_ptr);
887
888
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 32004 for (y = 0; y < 8; y++) {
889
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 256032 for (x = 0; x < 8; x++)
890 227584 pixel_ptr[x] = pix;
891 28448 pixel_ptr += s->stride;
892 }
893
894 /* report success */
895 3556 return 0;
896 }
897
898 static int (* const ipvideo_decode_block[])(IpvideoContext *s, AVFrame *frame) = {
899 ipvideo_decode_block_opcode_0x0, ipvideo_decode_block_opcode_0x1,
900 ipvideo_decode_block_opcode_0x2, ipvideo_decode_block_opcode_0x3,
901 ipvideo_decode_block_opcode_0x4, ipvideo_decode_block_opcode_0x5,
902 ipvideo_decode_block_opcode_0x6, ipvideo_decode_block_opcode_0x7,
903 ipvideo_decode_block_opcode_0x8, ipvideo_decode_block_opcode_0x9,
904 ipvideo_decode_block_opcode_0xA, ipvideo_decode_block_opcode_0xB,
905 ipvideo_decode_block_opcode_0xC, ipvideo_decode_block_opcode_0xD,
906 ipvideo_decode_block_opcode_0xE, ipvideo_decode_block_opcode_0xF,
907 };
908
909 static int (* const ipvideo_decode_block16[])(IpvideoContext *s, AVFrame *frame) = {
910 ipvideo_decode_block_opcode_0x0, ipvideo_decode_block_opcode_0x1,
911 ipvideo_decode_block_opcode_0x2, ipvideo_decode_block_opcode_0x3,
912 ipvideo_decode_block_opcode_0x4, ipvideo_decode_block_opcode_0x5,
913 ipvideo_decode_block_opcode_0x6_16, ipvideo_decode_block_opcode_0x7_16,
914 ipvideo_decode_block_opcode_0x8_16, ipvideo_decode_block_opcode_0x9_16,
915 ipvideo_decode_block_opcode_0xA_16, ipvideo_decode_block_opcode_0xB_16,
916 ipvideo_decode_block_opcode_0xC_16, ipvideo_decode_block_opcode_0xD_16,
917 ipvideo_decode_block_opcode_0xE_16, ipvideo_decode_block_opcode_0x1,
918 };
919
920 ✗ static void ipvideo_format_06_firstpass(IpvideoContext *s, AVFrame *frame, int16_t opcode)
921 {
922 int line;
923
924 ✗ if (!opcode) {
925 ✗ for (line = 0; line < 8; ++line) {
926 ✗ bytestream2_get_buffer(&s->stream_ptr, s->pixel_ptr, 8);
927 ✗ s->pixel_ptr += s->stride;
928 }
929 } else {
930 /* Don't try to copy second_last_frame data on the first frames */
931 ✗ if (s->avctx->frame_number > 2)
932 ✗ copy_from(s, s->second_last_frame, frame, 0, 0);
933 }
934 }
935
936 ✗ static void ipvideo_format_06_secondpass(IpvideoContext *s, AVFrame *frame, int16_t opcode)
937 {
938 int off_x, off_y;
939
940 ✗ if (opcode < 0) {
941 ✗ off_x = ((uint16_t)opcode - 0xC000) % frame->width;
942 ✗ off_y = ((uint16_t)opcode - 0xC000) / frame->width;
943 ✗ copy_from(s, s->last_frame, frame, off_x, off_y);
944 ✗ } else if (opcode > 0) {
945 ✗ off_x = ((uint16_t)opcode - 0x4000) % frame->width;
946 ✗ off_y = ((uint16_t)opcode - 0x4000) / frame->width;
947 ✗ copy_from(s, frame, frame, off_x, off_y);
948 }
949 }
950
951 static void (* const ipvideo_format_06_passes[])(IpvideoContext *s, AVFrame *frame, int16_t op) = {
952 ipvideo_format_06_firstpass, ipvideo_format_06_secondpass,
953 };
954
955 ✗ static void ipvideo_decode_format_06_opcodes(IpvideoContext *s, AVFrame *frame)
956 {
957 int pass, x, y;
958 int16_t opcode;
959 GetByteContext decoding_map_ptr;
960
961 /* this is PAL8, so make the palette available */
962 ✗ memcpy(frame->data[1], s->pal, AVPALETTE_SIZE);
963 ✗ s->stride = frame->linesize[0];
964
965 ✗ s->line_inc = s->stride - 8;
966 ✗ s->upper_motion_limit_offset = (s->avctx->height - 8) * frame->linesize[0]
967 ✗ + (s->avctx->width - 8) * (1 + s->is_16bpp);
968
969 ✗ bytestream2_init(&decoding_map_ptr, s->decoding_map, s->decoding_map_size);
970
971 ✗ for (pass = 0; pass < 2; ++pass) {
972 ✗ bytestream2_seek(&decoding_map_ptr, 0, SEEK_SET);
973 ✗ for (y = 0; y < s->avctx->height; y += 8) {
974 ✗ for (x = 0; x < s->avctx->width; x += 8) {
975 ✗ opcode = bytestream2_get_le16(&decoding_map_ptr);
976
977 ff_tlog(s->avctx,
978 " block @ (%3d, %3d): opcode 0x%X, data ptr offset %d\n",
979 x, y, opcode, bytestream2_tell(&s->stream_ptr));
980
981 ✗ s->pixel_ptr = frame->data[0] + x + y * frame->linesize[0];
982 ✗ ipvideo_format_06_passes[pass](s, frame, opcode);
983 }
984 }
985 }
986
987 ✗ if (bytestream2_get_bytes_left(&s->stream_ptr) > 1) {
988 ✗ av_log(s->avctx, AV_LOG_DEBUG,
989 "decode finished with %d bytes left over\n",
990 bytestream2_get_bytes_left(&s->stream_ptr));
991 }
992 }
993
994 ✗ static void ipvideo_format_10_firstpass(IpvideoContext *s, AVFrame *frame, int16_t opcode)
995 {
996 int line;
997
998 ✗ if (!opcode) {
999 ✗ for (line = 0; line < 8; ++line) {
1000 ✗ bytestream2_get_buffer(&s->stream_ptr, s->pixel_ptr, 8);
1001 ✗ s->pixel_ptr += s->stride;
1002 }
1003 }
1004 }
1005
1006 ✗ static void ipvideo_format_10_secondpass(IpvideoContext *s, AVFrame *frame, int16_t opcode)
1007 {
1008 int off_x, off_y;
1009
1010 ✗ if (opcode < 0) {
1011 ✗ off_x = ((uint16_t)opcode - 0xC000) % s->cur_decode_frame->width;
1012 ✗ off_y = ((uint16_t)opcode - 0xC000) / s->cur_decode_frame->width;
1013 ✗ copy_from(s, s->prev_decode_frame, s->cur_decode_frame, off_x, off_y);
1014 ✗ } else if (opcode > 0) {
1015 ✗ off_x = ((uint16_t)opcode - 0x4000) % s->cur_decode_frame->width;
1016 ✗ off_y = ((uint16_t)opcode - 0x4000) / s->cur_decode_frame->width;
1017 ✗ copy_from(s, s->cur_decode_frame, s->cur_decode_frame, off_x, off_y);
1018 }
1019 }
1020
1021 static void (* const ipvideo_format_10_passes[])(IpvideoContext *s, AVFrame *frame, int16_t op) = {
1022 ipvideo_format_10_firstpass, ipvideo_format_10_secondpass,
1023 };
1024
1025 ✗ static void ipvideo_decode_format_10_opcodes(IpvideoContext *s, AVFrame *frame)
1026 {
1027 int pass, x, y, changed_block;
1028 int16_t opcode, skip;
1029 GetByteContext decoding_map_ptr;
1030 GetByteContext skip_map_ptr;
1031
1032 ✗ bytestream2_skip(&s->stream_ptr, 14); /* data starts 14 bytes in */
1033
1034 /* this is PAL8, so make the palette available */
1035 ✗ memcpy(frame->data[1], s->pal, AVPALETTE_SIZE);
1036 ✗ s->stride = frame->linesize[0];
1037
1038 ✗ s->line_inc = s->stride - 8;
1039 ✗ s->upper_motion_limit_offset = (s->avctx->height - 8) * frame->linesize[0]
1040 ✗ + (s->avctx->width - 8) * (1 + s->is_16bpp);
1041
1042 ✗ bytestream2_init(&decoding_map_ptr, s->decoding_map, s->decoding_map_size);
1043 ✗ bytestream2_init(&skip_map_ptr, s->skip_map, s->skip_map_size);
1044
1045 ✗ for (pass = 0; pass < 2; ++pass) {
1046 ✗ bytestream2_seek(&decoding_map_ptr, 0, SEEK_SET);
1047 ✗ bytestream2_seek(&skip_map_ptr, 0, SEEK_SET);
1048 ✗ skip = bytestream2_get_le16(&skip_map_ptr);
1049
1050 ✗ for (y = 0; y < s->avctx->height; y += 8) {
1051 ✗ for (x = 0; x < s->avctx->width; x += 8) {
1052 ✗ s->pixel_ptr = s->cur_decode_frame->data[0] + x + y * s->cur_decode_frame->linesize[0];
1053
1054 ✗ while (skip <= 0) {
1055 ✗ if (skip != -0x8000 && skip) {
1056 ✗ opcode = bytestream2_get_le16(&decoding_map_ptr);
1057 ✗ ipvideo_format_10_passes[pass](s, frame, opcode);
1058 ✗ break;
1059 }
1060 ✗ if (bytestream2_get_bytes_left(&skip_map_ptr) < 2)
1061 ✗ return;
1062 ✗ skip = bytestream2_get_le16(&skip_map_ptr);
1063 }
1064 ✗ skip *= 2;
1065 }
1066 }
1067 }
1068
1069 ✗ bytestream2_seek(&skip_map_ptr, 0, SEEK_SET);
1070 ✗ skip = bytestream2_get_le16(&skip_map_ptr);
1071 ✗ for (y = 0; y < s->avctx->height; y += 8) {
1072 ✗ for (x = 0; x < s->avctx->width; x += 8) {
1073 ✗ changed_block = 0;
1074 ✗ s->pixel_ptr = frame->data[0] + x + y*frame->linesize[0];
1075
1076 ✗ while (skip <= 0) {
1077 ✗ if (skip != -0x8000 && skip) {
1078 ✗ changed_block = 1;
1079 ✗ break;
1080 }
1081 ✗ if (bytestream2_get_bytes_left(&skip_map_ptr) < 2)
1082 ✗ return;
1083 ✗ skip = bytestream2_get_le16(&skip_map_ptr);
1084 }
1085
1086 ✗ if (changed_block) {
1087 ✗ copy_from(s, s->cur_decode_frame, frame, 0, 0);
1088 } else {
1089 /* Don't try to copy last_frame data on the first frame */
1090 ✗ if (s->avctx->frame_number)
1091 ✗ copy_from(s, s->last_frame, frame, 0, 0);
1092 }
1093 ✗ skip *= 2;
1094 }
1095 }
1096
1097 ✗ FFSWAP(AVFrame*, s->prev_decode_frame, s->cur_decode_frame);
1098
1099 ✗ if (bytestream2_get_bytes_left(&s->stream_ptr) > 1) {
1100 ✗ av_log(s->avctx, AV_LOG_DEBUG,
1101 "decode finished with %d bytes left over\n",
1102 bytestream2_get_bytes_left(&s->stream_ptr));
1103 }
1104 }
1105
1106 160 static void ipvideo_decode_format_11_opcodes(IpvideoContext *s, AVFrame *frame)
1107 {
1108 int x, y;
1109 unsigned char opcode;
1110 int ret;
1111 GetBitContext gb;
1112
1113 160 bytestream2_skip(&s->stream_ptr, 14); /* data starts 14 bytes in */
1114
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 160 if (!s->is_16bpp) {
1115 /* this is PAL8, so make the palette available */
1116 110 memcpy(frame->data[1], s->pal, AVPALETTE_SIZE);
1117
1118 110 s->stride = frame->linesize[0];
1119 } else {
1120 50 s->stride = frame->linesize[0] >> 1;
1121 50 s->mv_ptr = s->stream_ptr;
1122 50 bytestream2_skip(&s->mv_ptr, bytestream2_get_le16(&s->stream_ptr));
1123 }
1124 160 s->line_inc = s->stride - 8;
1125 160 s->upper_motion_limit_offset = (s->avctx->height - 8) * frame->linesize[0]
1126 160 + (s->avctx->width - 8) * (1 + s->is_16bpp);
1127
1128 160 init_get_bits(&gb, s->decoding_map, s->decoding_map_size * 8);
1129
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 6560 for (y = 0; y < s->avctx->height; y += 8) {
1130
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 404000 for (x = 0; x < s->avctx->width; x += 8) {
1131
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 397600 if (get_bits_left(&gb) < 4)
1132 ✗ return;
1133 397600 opcode = get_bits(&gb, 4);
1134
1135 ff_tlog(s->avctx,
1136 " block @ (%3d, %3d): encoding 0x%X, data ptr offset %d\n",
1137 x, y, opcode, bytestream2_tell(&s->stream_ptr));
1138
1139
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 397600 if (!s->is_16bpp) {
1140 237600 s->pixel_ptr = frame->data[0] + x
1141 237600 + y*frame->linesize[0];
1142 237600 ret = ipvideo_decode_block[opcode](s, frame);
1143 } else {
1144 160000 s->pixel_ptr = frame->data[0] + x*2
1145 160000 + y*frame->linesize[0];
1146 160000 ret = ipvideo_decode_block16[opcode](s, frame);
1147 }
1148
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 397600 if (ret != 0) {
1149 ✗ av_log(s->avctx, AV_LOG_ERROR, "decode problem on frame %d, @ block (%d, %d)\n",
1150 ✗ s->avctx->frame_number, x, y);
1151 ✗ return;
1152 }
1153 }
1154 }
1155
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 160 if (bytestream2_get_bytes_left(&s->stream_ptr) > 1) {
1156 48 av_log(s->avctx, AV_LOG_DEBUG,
1157 "decode finished with %d bytes left over\n",
1158 bytestream2_get_bytes_left(&s->stream_ptr));
1159 }
1160 }
1161
1162 5 static av_cold int ipvideo_decode_init(AVCodecContext *avctx)
1163 {
1164 5 IpvideoContext *s = avctx->priv_data;
1165
1166 5 s->avctx = avctx;
1167
1168 5 s->is_16bpp = avctx->bits_per_coded_sample == 16;
1169
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 5 avctx->pix_fmt = s->is_16bpp ? AV_PIX_FMT_RGB555 : AV_PIX_FMT_PAL8;
1170
1171 5 ff_hpeldsp_init(&s->hdsp, avctx->flags);
1172
1173 5 s->last_frame = av_frame_alloc();
1174 5 s->second_last_frame = av_frame_alloc();
1175 5 s->cur_decode_frame = av_frame_alloc();
1176 5 s->prev_decode_frame = av_frame_alloc();
1177
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 5 if (!s->last_frame || !s->second_last_frame ||
1178
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 5 !s->cur_decode_frame || !s->prev_decode_frame) {
1179 ✗ return AVERROR(ENOMEM);
1180 }
1181
1182 5 s->cur_decode_frame->width = avctx->width;
1183 5 s->prev_decode_frame->width = avctx->width;
1184 5 s->cur_decode_frame->height = avctx->height;
1185 5 s->prev_decode_frame->height = avctx->height;
1186 5 s->cur_decode_frame->format = avctx->pix_fmt;
1187 5 s->prev_decode_frame->format = avctx->pix_fmt;
1188
1189 5 return 0;
1190 }
1191
1192 160 static int ipvideo_decode_frame(AVCodecContext *avctx, AVFrame *frame,
1193 int *got_frame, AVPacket *avpkt)
1194 {
1195 160 const uint8_t *buf = avpkt->data;
1196 160 int buf_size = avpkt->size;
1197 160 IpvideoContext *s = avctx->priv_data;
1198 int ret;
1199 int send_buffer;
1200 int frame_format;
1201 int video_data_size;
1202
1203
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 160 if (av_packet_get_side_data(avpkt, AV_PKT_DATA_PARAM_CHANGE, NULL)) {
1204 2 av_frame_unref(s->last_frame);
1205 2 av_frame_unref(s->second_last_frame);
1206 2 av_frame_unref(s->cur_decode_frame);
1207 2 av_frame_unref(s->prev_decode_frame);
1208 }
1209
1210
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 160 if (!s->cur_decode_frame->data[0]) {
1211 2 ret = ff_get_buffer(avctx, s->cur_decode_frame, 0);
1212
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 2 if (ret < 0)
1213 ✗ return ret;
1214
1215 2 ret = ff_get_buffer(avctx, s->prev_decode_frame, 0);
1216
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 2 if (ret < 0) {
1217 ✗ av_frame_unref(s->cur_decode_frame);
1218 ✗ return ret;
1219 }
1220 }
1221
1222
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 160 if (buf_size < 8)
1223 ✗ return AVERROR_INVALIDDATA;
1224
1225 160 frame_format = AV_RL8(buf);
1226 160 send_buffer = AV_RL8(buf + 1);
1227 160 video_data_size = AV_RL16(buf + 2);
1228 160 s->decoding_map_size = AV_RL16(buf + 4);
1229 160 s->skip_map_size = AV_RL16(buf + 6);
1230
1231
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 160 switch (frame_format) {
1232 ✗ case 0x06:
1233 ✗ if (s->decoding_map_size) {
1234 ✗ av_log(avctx, AV_LOG_ERROR, "Decoding map for format 0x06\n");
1235 ✗ return AVERROR_INVALIDDATA;
1236 }
1237
1238 ✗ if (s->skip_map_size) {
1239 ✗ av_log(avctx, AV_LOG_ERROR, "Skip map for format 0x06\n");
1240 ✗ return AVERROR_INVALIDDATA;
1241 }
1242
1243 ✗ if (s->is_16bpp) {
1244 ✗ av_log(avctx, AV_LOG_ERROR, "Video format 0x06 does not support 16bpp movies\n");
1245 ✗ return AVERROR_INVALIDDATA;
1246 }
1247
1248 /* Decoding map for 0x06 frame format is at the top of pixeldata */
1249 ✗ s->decoding_map_size = ((s->avctx->width / 8) * (s->avctx->height / 8)) * 2;
1250 ✗ s->decoding_map = buf + 8 + 14; /* 14 bits of op data */
1251 ✗ video_data_size -= s->decoding_map_size + 14;
1252 ✗ if (video_data_size <= 0 || s->decoding_map_size == 0)
1253 ✗ return AVERROR_INVALIDDATA;
1254
1255 ✗ if (buf_size < 8 + s->decoding_map_size + 14 + video_data_size)
1256 ✗ return AVERROR_INVALIDDATA;
1257
1258 ✗ bytestream2_init(&s->stream_ptr, buf + 8 + s->decoding_map_size + 14, video_data_size);
1259
1260 ✗ break;
1261
1262 ✗ case 0x10:
1263 ✗ if (! s->decoding_map_size) {
1264 ✗ av_log(avctx, AV_LOG_ERROR, "Empty decoding map for format 0x10\n");
1265 ✗ return AVERROR_INVALIDDATA;
1266 }
1267
1268 ✗ if (! s->skip_map_size) {
1269 ✗ av_log(avctx, AV_LOG_ERROR, "Empty skip map for format 0x10\n");
1270 ✗ return AVERROR_INVALIDDATA;
1271 }
1272
1273 ✗ if (s->is_16bpp) {
1274 ✗ av_log(avctx, AV_LOG_ERROR, "Video format 0x10 does not support 16bpp movies\n");
1275 ✗ return AVERROR_INVALIDDATA;
1276 }
1277
1278 ✗ if (buf_size < 8 + video_data_size + s->decoding_map_size + s->skip_map_size)
1279 ✗ return AVERROR_INVALIDDATA;
1280
1281 ✗ bytestream2_init(&s->stream_ptr, buf + 8, video_data_size);
1282 ✗ s->decoding_map = buf + 8 + video_data_size;
1283 ✗ s->skip_map = buf + 8 + video_data_size + s->decoding_map_size;
1284
1285 ✗ break;
1286
1287 160 case 0x11:
1288
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 160 if (! s->decoding_map_size) {
1289 ✗ av_log(avctx, AV_LOG_ERROR, "Empty decoding map for format 0x11\n");
1290 ✗ return AVERROR_INVALIDDATA;
1291 }
1292
1293
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 160 if (s->skip_map_size) {
1294 ✗ av_log(avctx, AV_LOG_ERROR, "Skip map for format 0x11\n");
1295 ✗ return AVERROR_INVALIDDATA;
1296 }
1297
1298
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 160 if (buf_size < 8 + video_data_size + s->decoding_map_size)
1299 ✗ return AVERROR_INVALIDDATA;
1300
1301 160 bytestream2_init(&s->stream_ptr, buf + 8, video_data_size);
1302 160 s->decoding_map = buf + 8 + video_data_size;
1303
1304 160 break;
1305
1306 ✗ default:
1307 ✗ av_log(avctx, AV_LOG_ERROR, "Frame type 0x%02X unsupported\n", frame_format);
1308 }
1309
1310 /* ensure we can't overread the packet */
1311
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 160 if (buf_size < 8 + s->decoding_map_size + video_data_size + s->skip_map_size) {
1312 ✗ av_log(avctx, AV_LOG_ERROR, "Invalid IP packet size\n");
1313 ✗ return AVERROR_INVALIDDATA;
1314 }
1315
1316
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 160 if ((ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0)
1317 ✗ return ret;
1318
1319
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 160 if (!s->is_16bpp) {
1320 110 frame->palette_has_changed = ff_copy_palette(s->pal, avpkt, avctx);
1321 }
1322
1323
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 160 switch (frame_format) {
1324 ✗ case 0x06:
1325 ✗ ipvideo_decode_format_06_opcodes(s, frame);
1326 ✗ break;
1327 ✗ case 0x10:
1328 ✗ ipvideo_decode_format_10_opcodes(s, frame);
1329 ✗ break;
1330 160 case 0x11:
1331 160 ipvideo_decode_format_11_opcodes(s, frame);
1332 160 break;
1333 }
1334
1335 160 *got_frame = send_buffer;
1336
1337 /* shuffle frames */
1338 160 av_frame_unref(s->second_last_frame);
1339 160 FFSWAP(AVFrame*, s->second_last_frame, s->last_frame);
1340
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 160 if ((ret = av_frame_ref(s->last_frame, frame)) < 0)
1341 ✗ return ret;
1342
1343 /* report that the buffer was completely consumed */
1344 160 return buf_size;
1345 }
1346
1347 5 static av_cold int ipvideo_decode_end(AVCodecContext *avctx)
1348 {
1349 5 IpvideoContext *s = avctx->priv_data;
1350
1351 5 av_frame_free(&s->last_frame);
1352 5 av_frame_free(&s->second_last_frame);
1353 5 av_frame_free(&s->cur_decode_frame);
1354 5 av_frame_free(&s->prev_decode_frame);
1355
1356 5 return 0;
1357 }
1358
1359 const FFCodec ff_interplay_video_decoder = {
1360 .p.name = "interplayvideo",
1361 .p.long_name = NULL_IF_CONFIG_SMALL("Interplay MVE video"),
1362 .p.type = AVMEDIA_TYPE_VIDEO,
1363 .p.id = AV_CODEC_ID_INTERPLAY_VIDEO,
1364 .priv_data_size = sizeof(IpvideoContext),
1365 .init = ipvideo_decode_init,
1366 .close = ipvideo_decode_end,
1367 FF_CODEC_DECODE_CB(ipvideo_decode_frame),
1368 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_PARAM_CHANGE,
1369 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
1370 };
1371