FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/interplayvideo.c
Date: 2021-09-26 18:22:30
Exec Total Coverage
Lines: 454 630 72.1%
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 "decode.h"
47 #include "get_bits.h"
48 #include "hpeldsp.h"
49 #include "internal.h"
50
51 #define PALETTE_COUNT 256
52
53 typedef struct IpvideoContext {
54
55 AVCodecContext *avctx;
56 HpelDSPContext hdsp;
57 AVFrame *second_last_frame;
58 AVFrame *last_frame;
59
60 /* For format 0x10 */
61 AVFrame *cur_decode_frame;
62 AVFrame *prev_decode_frame;
63
64 const unsigned char *decoding_map;
65 int decoding_map_size;
66 const unsigned char *skip_map;
67 int skip_map_size;
68
69 int is_16bpp;
70 GetByteContext stream_ptr, mv_ptr;
71 unsigned char *pixel_ptr;
72 int line_inc;
73 int stride;
74 int upper_motion_limit_offset;
75
76 uint32_t pal[256];
77 } IpvideoContext;
78
79 341521 static int copy_from(IpvideoContext *s, AVFrame *src, AVFrame *dst, int delta_x, int delta_y)
80 {
81 341521 int width = dst->width;
82 341521 int current_offset = s->pixel_ptr - dst->data[0];
83 341521 int x = (current_offset % dst->linesize[0]) / (1 + s->is_16bpp);
84 341521 int y = current_offset / dst->linesize[0];
85 341521 int dx = delta_x + x - ((delta_x + x >= width) - (delta_x + x < 0)) * width;
86 341521 int dy = delta_y + y + (delta_x + x >= width) - (delta_x + x < 0);
87 341521 int motion_offset = dy * src->linesize[0] + dx * (1 + s->is_16bpp);
88
89
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 341521 if (motion_offset < 0) {
90 ✗ av_log(s->avctx, AV_LOG_ERROR, "motion offset < 0 (%d)\n", motion_offset);
91 ✗ return AVERROR_INVALIDDATA;
92
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 341521 } else if (motion_offset > s->upper_motion_limit_offset) {
93 ✗ av_log(s->avctx, AV_LOG_ERROR, "motion offset above limit (%d >= %d)\n",
94 motion_offset, s->upper_motion_limit_offset);
95 ✗ return AVERROR_INVALIDDATA;
96 }
97
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 341521 if (!src->data[0]) {
98 ✗ av_log(s->avctx, AV_LOG_ERROR, "Invalid decode type, corrupted header?\n");
99 ✗ return AVERROR(EINVAL);
100 }
101 341521 s->hdsp.put_pixels_tab[!s->is_16bpp][0](s->pixel_ptr, src->data[0] + motion_offset,
102 341521 dst->linesize[0], 8);
103 341521 return 0;
104 }
105
106 34551 static int ipvideo_decode_block_opcode_0x0(IpvideoContext *s, AVFrame *frame)
107 {
108 34551 return copy_from(s, s->last_frame, frame, 0, 0);
109 }
110
111 280419 static int ipvideo_decode_block_opcode_0x1(IpvideoContext *s, AVFrame *frame)
112 {
113 280419 return copy_from(s, s->second_last_frame, frame, 0, 0);
114 }
115
116 1282 static int ipvideo_decode_block_opcode_0x2(IpvideoContext *s, AVFrame *frame)
117 {
118 unsigned char B;
119 int x, y;
120
121 /* copy block from 2 frames ago using a motion vector; need 1 more byte */
122
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 1282 if (!s->is_16bpp) {
123 579 B = bytestream2_get_byte(&s->stream_ptr);
124 } else {
125 703 B = bytestream2_get_byte(&s->mv_ptr);
126 }
127
128
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 1282 if (B < 56) {
129 491 x = 8 + (B % 7);
130 491 y = B / 7;
131 } else {
132 791 x = -14 + ((B - 56) % 29);
133 791 y = 8 + ((B - 56) / 29);
134 }
135
136 ff_tlog(s->avctx, "motion byte = %d, (x, y) = (%d, %d)\n", B, x, y);
137 1282 return copy_from(s, s->second_last_frame, frame, x, y);
138 }
139
140 3043 static int ipvideo_decode_block_opcode_0x3(IpvideoContext *s, AVFrame *frame)
141 {
142 unsigned char B;
143 int x, y;
144
145 /* copy 8x8 block from current frame from an up/left block */
146
147 /* need 1 more byte for motion */
148
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 3043 if (!s->is_16bpp) {
149 387 B = bytestream2_get_byte(&s->stream_ptr);
150 } else {
151 2656 B = bytestream2_get_byte(&s->mv_ptr);
152 }
153
154
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 3043 if (B < 56) {
155 1630 x = -(8 + (B % 7));
156 1630 y = -(B / 7);
157 } else {
158 1413 x = -(-14 + ((B - 56) % 29));
159 1413 y = -( 8 + ((B - 56) / 29));
160 }
161
162 ff_tlog(s->avctx, "motion byte = %d, (x, y) = (%d, %d)\n", B, x, y);
163 3043 return copy_from(s, frame, frame, x, y);
164 }
165
166 18863 static int ipvideo_decode_block_opcode_0x4(IpvideoContext *s, AVFrame *frame)
167 {
168 int x, y;
169 unsigned char B, BL, BH;
170
171 /* copy a block from the previous frame; need 1 more byte */
172
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 18863 if (!s->is_16bpp) {
173 6043 B = bytestream2_get_byte(&s->stream_ptr);
174 } else {
175 12820 B = bytestream2_get_byte(&s->mv_ptr);
176 }
177
178 18863 BL = B & 0x0F;
179 18863 BH = (B >> 4) & 0x0F;
180 18863 x = -8 + BL;
181 18863 y = -8 + BH;
182
183 ff_tlog(s->avctx, "motion byte = %d, (x, y) = (%d, %d)\n", B, x, y);
184 18863 return copy_from(s, s->last_frame, frame, x, y);
185 }
186
187 3363 static int ipvideo_decode_block_opcode_0x5(IpvideoContext *s, AVFrame *frame)
188 {
189 signed char x, y;
190
191 /* copy a block from the previous frame using an expanded range;
192 * need 2 more bytes */
193 3363 x = bytestream2_get_byte(&s->stream_ptr);
194 3363 y = bytestream2_get_byte(&s->stream_ptr);
195
196 ff_tlog(s->avctx, "motion bytes = %d, %d\n", x, y);
197 3363 return copy_from(s, s->last_frame, frame, x, y);
198 }
199
200 ✗ static int ipvideo_decode_block_opcode_0x6(IpvideoContext *s, AVFrame *frame)
201 {
202 /* mystery opcode? skip multiple blocks? */
203 ✗ av_log(s->avctx, AV_LOG_ERROR, "Help! Mystery opcode 0x6 seen\n");
204
205 /* report success */
206 ✗ return 0;
207 }
208
209 815 static int ipvideo_decode_block_opcode_0x7(IpvideoContext *s, AVFrame *frame)
210 {
211 int x, y;
212 unsigned char P[2];
213 unsigned int flags;
214
215
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 815 if (bytestream2_get_bytes_left(&s->stream_ptr) < 4) {
216 ✗ av_log(s->avctx, AV_LOG_ERROR, "too little data for opcode 0x7\n");
217 ✗ return AVERROR_INVALIDDATA;
218 }
219
220 /* 2-color encoding */
221 815 P[0] = bytestream2_get_byte(&s->stream_ptr);
222 815 P[1] = bytestream2_get_byte(&s->stream_ptr);
223
224
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 815 if (P[0] <= P[1]) {
225
226 /* need 8 more bytes from the stream */
227
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 6471 for (y = 0; y < 8; y++) {
228 5752 flags = bytestream2_get_byte(&s->stream_ptr) | 0x100;
229
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 51768 for (; flags != 1; flags >>= 1)
230 46016 *s->pixel_ptr++ = P[flags & 1];
231 5752 s->pixel_ptr += s->line_inc;
232 }
233
234 } else {
235
236 /* need 2 more bytes from the stream */
237 96 flags = bytestream2_get_le16(&s->stream_ptr);
238
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 480 for (y = 0; y < 8; y += 2) {
239
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 1920 for (x = 0; x < 8; x += 2, flags >>= 1) {
240 1536 s->pixel_ptr[x ] =
241 1536 s->pixel_ptr[x + 1 ] =
242 1536 s->pixel_ptr[x + s->stride] =
243 1536 s->pixel_ptr[x + 1 + s->stride] = P[flags & 1];
244 }
245 384 s->pixel_ptr += s->stride * 2;
246 }
247 }
248
249 /* report success */
250 815 return 0;
251 }
252
253 1013 static int ipvideo_decode_block_opcode_0x8(IpvideoContext *s, AVFrame *frame)
254 {
255 int x, y;
256 unsigned char P[4];
257 1013 unsigned int flags = 0;
258
259
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 1013 if (bytestream2_get_bytes_left(&s->stream_ptr) < 12) {
260 ✗ av_log(s->avctx, AV_LOG_ERROR, "too little data for opcode 0x8\n");
261 ✗ return AVERROR_INVALIDDATA;
262 }
263
264 /* 2-color encoding for each 4x4 quadrant, or 2-color encoding on
265 * either top and bottom or left and right halves */
266 1013 P[0] = bytestream2_get_byte(&s->stream_ptr);
267 1013 P[1] = bytestream2_get_byte(&s->stream_ptr);
268
269
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 1013 if (P[0] <= P[1]) {
270
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 5627 for (y = 0; y < 16; y++) {
271 // new values for each 4x4 block
272
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 5296 if (!(y & 3)) {
273
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 1324 if (y) {
274 993 P[0] = bytestream2_get_byte(&s->stream_ptr);
275 993 P[1] = bytestream2_get_byte(&s->stream_ptr);
276 }
277 1324 flags = bytestream2_get_le16(&s->stream_ptr);
278 }
279
280
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 26480 for (x = 0; x < 4; x++, flags >>= 1)
281 21184 *s->pixel_ptr++ = P[flags & 1];
282 5296 s->pixel_ptr += s->stride - 4;
283 // switch to right half
284
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 5296 if (y == 7) s->pixel_ptr -= 8 * s->stride - 4;
285 }
286
287 } else {
288 682 flags = bytestream2_get_le32(&s->stream_ptr);
289 682 P[2] = bytestream2_get_byte(&s->stream_ptr);
290 682 P[3] = bytestream2_get_byte(&s->stream_ptr);
291
292
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 682 if (P[2] <= P[3]) {
293
294 /* vertical split; left & right halves are 2-color encoded */
295
296
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 6919 for (y = 0; y < 16; y++) {
297
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 32560 for (x = 0; x < 4; x++, flags >>= 1)
298 26048 *s->pixel_ptr++ = P[flags & 1];
299 6512 s->pixel_ptr += s->stride - 4;
300 // switch to right half
301
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 6512 if (y == 7) {
302 407 s->pixel_ptr -= 8 * s->stride - 4;
303 407 P[0] = P[2];
304 407 P[1] = P[3];
305 407 flags = bytestream2_get_le32(&s->stream_ptr);
306 }
307 }
308
309 } else {
310
311 /* horizontal split; top & bottom halves are 2-color encoded */
312
313
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 2475 for (y = 0; y < 8; y++) {
314
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 2200 if (y == 4) {
315 275 P[0] = P[2];
316 275 P[1] = P[3];
317 275 flags = bytestream2_get_le32(&s->stream_ptr);
318 }
319
320
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 19800 for (x = 0; x < 8; x++, flags >>= 1)
321 17600 *s->pixel_ptr++ = P[flags & 1];
322 2200 s->pixel_ptr += s->line_inc;
323 }
324 }
325 }
326
327 /* report success */
328 1013 return 0;
329 }
330
331 2412 static int ipvideo_decode_block_opcode_0x9(IpvideoContext *s, AVFrame *frame)
332 {
333 int x, y;
334 unsigned char P[4];
335
336
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 2412 if (bytestream2_get_bytes_left(&s->stream_ptr) < 8) {
337 ✗ av_log(s->avctx, AV_LOG_ERROR, "too little data for opcode 0x9\n");
338 ✗ return AVERROR_INVALIDDATA;
339 }
340
341 /* 4-color encoding */
342 2412 bytestream2_get_buffer(&s->stream_ptr, P, 4);
343
344
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 2412 if (P[0] <= P[1]) {
345
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 2053 if (P[2] <= P[3]) {
346
347 /* 1 of 4 colors for each pixel, need 16 more bytes */
348
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 16515 for (y = 0; y < 8; y++) {
349 /* get the next set of 8 2-bit flags */
350 14680 int flags = bytestream2_get_le16(&s->stream_ptr);
351
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 132120 for (x = 0; x < 8; x++, flags >>= 2)
352 117440 *s->pixel_ptr++ = P[flags & 0x03];
353 14680 s->pixel_ptr += s->line_inc;
354 }
355
356 } else {
357 uint32_t flags;
358
359 /* 1 of 4 colors for each 2x2 block, need 4 more bytes */
360 218 flags = bytestream2_get_le32(&s->stream_ptr);
361
362
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 1090 for (y = 0; y < 8; y += 2) {
363
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 4360 for (x = 0; x < 8; x += 2, flags >>= 2) {
364 3488 s->pixel_ptr[x ] =
365 3488 s->pixel_ptr[x + 1 ] =
366 3488 s->pixel_ptr[x + s->stride] =
367 3488 s->pixel_ptr[x + 1 + s->stride] = P[flags & 0x03];
368 }
369 872 s->pixel_ptr += s->stride * 2;
370 }
371
372 }
373 } else {
374 uint64_t flags;
375
376 /* 1 of 4 colors for each 2x1 or 1x2 block, need 8 more bytes */
377 359 flags = bytestream2_get_le64(&s->stream_ptr);
378
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 359 if (P[2] <= P[3]) {
379
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 1755 for (y = 0; y < 8; y++) {
380
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 7800 for (x = 0; x < 8; x += 2, flags >>= 2) {
381 6240 s->pixel_ptr[x ] =
382 6240 s->pixel_ptr[x + 1] = P[flags & 0x03];
383 }
384 1560 s->pixel_ptr += s->stride;
385 }
386 } else {
387
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 820 for (y = 0; y < 8; y += 2) {
388
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 5904 for (x = 0; x < 8; x++, flags >>= 2) {
389 5248 s->pixel_ptr[x ] =
390 5248 s->pixel_ptr[x + s->stride] = P[flags & 0x03];
391 }
392 656 s->pixel_ptr += s->stride * 2;
393 }
394 }
395 }
396
397 /* report success */
398 2412 return 0;
399 }
400
401 5451 static int ipvideo_decode_block_opcode_0xA(IpvideoContext *s, AVFrame *frame)
402 {
403 int x, y;
404 unsigned char P[8];
405 5451 int flags = 0;
406
407
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 5451 if (bytestream2_get_bytes_left(&s->stream_ptr) < 16) {
408 ✗ av_log(s->avctx, AV_LOG_ERROR, "too little data for opcode 0xA\n");
409 ✗ return AVERROR_INVALIDDATA;
410 }
411
412 5451 bytestream2_get_buffer(&s->stream_ptr, P, 4);
413
414 /* 4-color encoding for each 4x4 quadrant, or 4-color encoding on
415 * either top and bottom or left and right halves */
416
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 5451 if (P[0] <= P[1]) {
417
418 /* 4-color encoding for each quadrant; need 32 bytes */
419
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 32419 for (y = 0; y < 16; y++) {
420 // new values for each 4x4 block
421
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 30512 if (!(y & 3)) {
422
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 7628 if (y) bytestream2_get_buffer(&s->stream_ptr, P, 4);
423 7628 flags = bytestream2_get_le32(&s->stream_ptr);
424 }
425
426
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 152560 for (x = 0; x < 4; x++, flags >>= 2)
427 122048 *s->pixel_ptr++ = P[flags & 0x03];
428
429 30512 s->pixel_ptr += s->stride - 4;
430 // switch to right half
431
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 30512 if (y == 7) s->pixel_ptr -= 8 * s->stride - 4;
432 }
433
434 } else {
435 // vertical split?
436 int vert;
437 3544 uint64_t flags = bytestream2_get_le64(&s->stream_ptr);
438
439 3544 bytestream2_get_buffer(&s->stream_ptr, P + 4, 4);
440 3544 vert = P[4] <= P[5];
441
442 /* 4-color encoding for either left and right or top and bottom
443 * halves */
444
445
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 60248 for (y = 0; y < 16; y++) {
446
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 283520 for (x = 0; x < 4; x++, flags >>= 2)
447 226816 *s->pixel_ptr++ = P[flags & 0x03];
448
449
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 56704 if (vert) {
450 30576 s->pixel_ptr += s->stride - 4;
451 // switch to right half
452
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 30576 if (y == 7) s->pixel_ptr -= 8 * s->stride - 4;
453
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 26128 } else if (y & 1) s->pixel_ptr += s->line_inc;
454
455 // load values for second half
456
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 56704 if (y == 7) {
457 3544 memcpy(P, P + 4, 4);
458 3544 flags = bytestream2_get_le64(&s->stream_ptr);
459 }
460 }
461 }
462
463 /* report success */
464 5451 return 0;
465 }
466
467 21074 static int ipvideo_decode_block_opcode_0xB(IpvideoContext *s, AVFrame *frame)
468 {
469 int y;
470
471 /* 64-color encoding (each pixel in block is a different color) */
472
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 189666 for (y = 0; y < 8; y++) {
473 168592 bytestream2_get_buffer(&s->stream_ptr, s->pixel_ptr, 8);
474 168592 s->pixel_ptr += s->stride;
475 }
476
477 /* report success */
478 21074 return 0;
479 }
480
481 135 static int ipvideo_decode_block_opcode_0xC(IpvideoContext *s, AVFrame *frame)
482 {
483 int x, y;
484
485 /* 16-color block encoding: each 2x2 block is a different color */
486
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 675 for (y = 0; y < 8; y += 2) {
487
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 2700 for (x = 0; x < 8; x += 2) {
488 2160 s->pixel_ptr[x ] =
489 2160 s->pixel_ptr[x + 1 ] =
490 2160 s->pixel_ptr[x + s->stride] =
491 2160 s->pixel_ptr[x + 1 + s->stride] = bytestream2_get_byte(&s->stream_ptr);
492 }
493 540 s->pixel_ptr += s->stride * 2;
494 }
495
496 /* report success */
497 135 return 0;
498 }
499
500 49 static int ipvideo_decode_block_opcode_0xD(IpvideoContext *s, AVFrame *frame)
501 {
502 int y;
503 unsigned char P[2];
504
505
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 49 if (bytestream2_get_bytes_left(&s->stream_ptr) < 4) {
506 ✗ av_log(s->avctx, AV_LOG_ERROR, "too little data for opcode 0xD\n");
507 ✗ return AVERROR_INVALIDDATA;
508 }
509
510 /* 4-color block encoding: each 4x4 block is a different color */
511
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 441 for (y = 0; y < 8; y++) {
512
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 392 if (!(y & 3)) {
513 98 P[0] = bytestream2_get_byte(&s->stream_ptr);
514 98 P[1] = bytestream2_get_byte(&s->stream_ptr);
515 }
516 392 memset(s->pixel_ptr, P[0], 4);
517 392 memset(s->pixel_ptr + 4, P[1], 4);
518 392 s->pixel_ptr += s->stride;
519 }
520
521 /* report success */
522 49 return 0;
523 }
524
525 1696 static int ipvideo_decode_block_opcode_0xE(IpvideoContext *s, AVFrame *frame)
526 {
527 int y;
528 unsigned char pix;
529
530 /* 1-color encoding: the whole block is 1 solid color */
531 1696 pix = bytestream2_get_byte(&s->stream_ptr);
532
533
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 15264 for (y = 0; y < 8; y++) {
534 13568 memset(s->pixel_ptr, pix, 8);
535 13568 s->pixel_ptr += s->stride;
536 }
537
538 /* report success */
539 1696 return 0;
540 }
541
542 27 static int ipvideo_decode_block_opcode_0xF(IpvideoContext *s, AVFrame *frame)
543 {
544 int x, y;
545 unsigned char sample[2];
546
547 /* dithered encoding */
548 27 sample[0] = bytestream2_get_byte(&s->stream_ptr);
549 27 sample[1] = bytestream2_get_byte(&s->stream_ptr);
550
551
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 243 for (y = 0; y < 8; y++) {
552
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 1080 for (x = 0; x < 8; x += 2) {
553 864 *s->pixel_ptr++ = sample[ y & 1 ];
554 864 *s->pixel_ptr++ = sample[!(y & 1)];
555 }
556 216 s->pixel_ptr += s->line_inc;
557 }
558
559 /* report success */
560 27 return 0;
561 }
562
563 ✗ static int ipvideo_decode_block_opcode_0x6_16(IpvideoContext *s, AVFrame *frame)
564 {
565 signed char x, y;
566
567 /* copy a block from the second last frame using an expanded range */
568 ✗ x = bytestream2_get_byte(&s->stream_ptr);
569 ✗ y = bytestream2_get_byte(&s->stream_ptr);
570
571 ff_tlog(s->avctx, "motion bytes = %d, %d\n", x, y);
572 ✗ return copy_from(s, s->second_last_frame, frame, x, y);
573 }
574
575 2197 static int ipvideo_decode_block_opcode_0x7_16(IpvideoContext *s, AVFrame *frame)
576 {
577 int x, y;
578 uint16_t P[2];
579 unsigned int flags;
580 2197 uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
581
582 /* 2-color encoding */
583 2197 P[0] = bytestream2_get_le16(&s->stream_ptr);
584 2197 P[1] = bytestream2_get_le16(&s->stream_ptr);
585
586
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 2197 if (!(P[0] & 0x8000)) {
587
588
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 14823 for (y = 0; y < 8; y++) {
589 13176 flags = bytestream2_get_byte(&s->stream_ptr) | 0x100;
590
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 118584 for (; flags != 1; flags >>= 1)
591 105408 *pixel_ptr++ = P[flags & 1];
592 13176 pixel_ptr += s->line_inc;
593 }
594
595 } else {
596
597 550 flags = bytestream2_get_le16(&s->stream_ptr);
598
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 2750 for (y = 0; y < 8; y += 2) {
599
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 11000 for (x = 0; x < 8; x += 2, flags >>= 1) {
600 8800 pixel_ptr[x ] =
601 8800 pixel_ptr[x + 1 ] =
602 8800 pixel_ptr[x + s->stride] =
603 8800 pixel_ptr[x + 1 + s->stride] = P[flags & 1];
604 }
605 2200 pixel_ptr += s->stride * 2;
606 }
607 }
608
609 2197 return 0;
610 }
611
612 1478 static int ipvideo_decode_block_opcode_0x8_16(IpvideoContext *s, AVFrame *frame)
613 {
614 int x, y;
615 uint16_t P[4];
616 1478 unsigned int flags = 0;
617 1478 uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
618
619 /* 2-color encoding for each 4x4 quadrant, or 2-color encoding on
620 * either top and bottom or left and right halves */
621 1478 P[0] = bytestream2_get_le16(&s->stream_ptr);
622 1478 P[1] = bytestream2_get_le16(&s->stream_ptr);
623
624
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 1478 if (!(P[0] & 0x8000)) {
625
626
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 4522 for (y = 0; y < 16; y++) {
627 // new values for each 4x4 block
628
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 4256 if (!(y & 3)) {
629
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 1064 if (y) {
630 798 P[0] = bytestream2_get_le16(&s->stream_ptr);
631 798 P[1] = bytestream2_get_le16(&s->stream_ptr);
632 }
633 1064 flags = bytestream2_get_le16(&s->stream_ptr);
634 }
635
636
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 21280 for (x = 0; x < 4; x++, flags >>= 1)
637 17024 *pixel_ptr++ = P[flags & 1];
638 4256 pixel_ptr += s->stride - 4;
639 // switch to right half
640
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 4256 if (y == 7) pixel_ptr -= 8 * s->stride - 4;
641 }
642
643 } else {
644
645 1212 flags = bytestream2_get_le32(&s->stream_ptr);
646 1212 P[2] = bytestream2_get_le16(&s->stream_ptr);
647 1212 P[3] = bytestream2_get_le16(&s->stream_ptr);
648
649
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 1212 if (!(P[2] & 0x8000)) {
650
651 /* vertical split; left & right halves are 2-color encoded */
652
653
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 6834 for (y = 0; y < 16; y++) {
654
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 32160 for (x = 0; x < 4; x++, flags >>= 1)
655 25728 *pixel_ptr++ = P[flags & 1];
656 6432 pixel_ptr += s->stride - 4;
657 // switch to right half
658
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 6432 if (y == 7) {
659 402 pixel_ptr -= 8 * s->stride - 4;
660 402 P[0] = P[2];
661 402 P[1] = P[3];
662 402 flags = bytestream2_get_le32(&s->stream_ptr);
663 }
664 }
665
666 } else {
667
668 /* horizontal split; top & bottom halves are 2-color encoded */
669
670
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 7290 for (y = 0; y < 8; y++) {
671
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 6480 if (y == 4) {
672 810 P[0] = P[2];
673 810 P[1] = P[3];
674 810 flags = bytestream2_get_le32(&s->stream_ptr);
675 }
676
677
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 58320 for (x = 0; x < 8; x++, flags >>= 1)
678 51840 *pixel_ptr++ = P[flags & 1];
679 6480 pixel_ptr += s->line_inc;
680 }
681 }
682 }
683
684 /* report success */
685 1478 return 0;
686 }
687
688 6526 static int ipvideo_decode_block_opcode_0x9_16(IpvideoContext *s, AVFrame *frame)
689 {
690 int x, y;
691 uint16_t P[4];
692 6526 uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
693
694 /* 4-color encoding */
695
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 32630 for (x = 0; x < 4; x++)
696 26104 P[x] = bytestream2_get_le16(&s->stream_ptr);
697
698
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 6526 if (!(P[0] & 0x8000)) {
699
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 2987 if (!(P[2] & 0x8000)) {
700
701 /* 1 of 4 colors for each pixel */
702
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 25947 for (y = 0; y < 8; y++) {
703 /* get the next set of 8 2-bit flags */
704 23064 int flags = bytestream2_get_le16(&s->stream_ptr);
705
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 207576 for (x = 0; x < 8; x++, flags >>= 2)
706 184512 *pixel_ptr++ = P[flags & 0x03];
707 23064 pixel_ptr += s->line_inc;
708 }
709
710 } else {
711 uint32_t flags;
712
713 /* 1 of 4 colors for each 2x2 block */
714 104 flags = bytestream2_get_le32(&s->stream_ptr);
715
716
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 520 for (y = 0; y < 8; y += 2) {
717
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 2080 for (x = 0; x < 8; x += 2, flags >>= 2) {
718 1664 pixel_ptr[x ] =
719 1664 pixel_ptr[x + 1 ] =
720 1664 pixel_ptr[x + s->stride] =
721 1664 pixel_ptr[x + 1 + s->stride] = P[flags & 0x03];
722 }
723 416 pixel_ptr += s->stride * 2;
724 }
725
726 }
727 } else {
728 uint64_t flags;
729
730 /* 1 of 4 colors for each 2x1 or 1x2 block */
731 3539 flags = bytestream2_get_le64(&s->stream_ptr);
732
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 3539 if (!(P[2] & 0x8000)) {
733
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 25371 for (y = 0; y < 8; y++) {
734
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 112760 for (x = 0; x < 8; x += 2, flags >>= 2) {
735 90208 pixel_ptr[x ] =
736 90208 pixel_ptr[x + 1] = P[flags & 0x03];
737 }
738 22552 pixel_ptr += s->stride;
739 }
740 } else {
741
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 3600 for (y = 0; y < 8; y += 2) {
742
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 25920 for (x = 0; x < 8; x++, flags >>= 2) {
743 23040 pixel_ptr[x ] =
744 23040 pixel_ptr[x + s->stride] = P[flags & 0x03];
745 }
746 2880 pixel_ptr += s->stride * 2;
747 }
748 }
749 }
750
751 /* report success */
752 6526 return 0;
753 }
754
755 7914 static int ipvideo_decode_block_opcode_0xA_16(IpvideoContext *s, AVFrame *frame)
756 {
757 int x, y;
758 uint16_t P[8];
759 7914 int flags = 0;
760 7914 uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
761
762
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 39570 for (x = 0; x < 4; x++)
763 31656 P[x] = bytestream2_get_le16(&s->stream_ptr);
764
765 /* 4-color encoding for each 4x4 quadrant, or 4-color encoding on
766 * either top and bottom or left and right halves */
767
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 7914 if (!(P[0] & 0x8000)) {
768
769 /* 4-color encoding for each quadrant */
770
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 52530 for (y = 0; y < 16; y++) {
771 // new values for each 4x4 block
772
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 49440 if (!(y & 3)) {
773
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 12360 if (y)
774
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 46350 for (x = 0; x < 4; x++)
775 37080 P[x] = bytestream2_get_le16(&s->stream_ptr);
776 12360 flags = bytestream2_get_le32(&s->stream_ptr);
777 }
778
779
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 247200 for (x = 0; x < 4; x++, flags >>= 2)
780 197760 *pixel_ptr++ = P[flags & 0x03];
781
782 49440 pixel_ptr += s->stride - 4;
783 // switch to right half
784
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 49440 if (y == 7) pixel_ptr -= 8 * s->stride - 4;
785 }
786
787 } else {
788 // vertical split?
789 int vert;
790 4824 uint64_t flags = bytestream2_get_le64(&s->stream_ptr);
791
792
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 24120 for (x = 4; x < 8; x++)
793 19296 P[x] = bytestream2_get_le16(&s->stream_ptr);
794 4824 vert = !(P[4] & 0x8000);
795
796 /* 4-color encoding for either left and right or top and bottom
797 * halves */
798
799
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 82008 for (y = 0; y < 16; y++) {
800
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 385920 for (x = 0; x < 4; x++, flags >>= 2)
801 308736 *pixel_ptr++ = P[flags & 0x03];
802
803
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 77184 if (vert) {
804 26000 pixel_ptr += s->stride - 4;
805 // switch to right half
806
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 26000 if (y == 7) pixel_ptr -= 8 * s->stride - 4;
807
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 51184 } else if (y & 1) pixel_ptr += s->line_inc;
808
809 // load values for second half
810
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 77184 if (y == 7) {
811 4824 memcpy(P, P + 4, 8);
812 4824 flags = bytestream2_get_le64(&s->stream_ptr);
813 }
814 }
815 }
816
817 /* report success */
818 7914 return 0;
819 }
820
821 1690 static int ipvideo_decode_block_opcode_0xB_16(IpvideoContext *s, AVFrame *frame)
822 {
823 int x, y;
824 1690 uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
825
826 /* 64-color encoding (each pixel in block is a different color) */
827
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 15210 for (y = 0; y < 8; y++) {
828
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 121680 for (x = 0; x < 8; x++)
829 108160 pixel_ptr[x] = bytestream2_get_le16(&s->stream_ptr);
830 13520 pixel_ptr += s->stride;
831 }
832
833 /* report success */
834 1690 return 0;
835 }
836
837 8 static int ipvideo_decode_block_opcode_0xC_16(IpvideoContext *s, AVFrame *frame)
838 {
839 int x, y;
840 8 uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
841
842 /* 16-color block encoding: each 2x2 block is a different color */
843
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 40 for (y = 0; y < 8; y += 2) {
844
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 160 for (x = 0; x < 8; x += 2) {
845 128 pixel_ptr[x ] =
846 128 pixel_ptr[x + 1 ] =
847 128 pixel_ptr[x + s->stride] =
848 128 pixel_ptr[x + 1 + s->stride] = bytestream2_get_le16(&s->stream_ptr);
849 }
850 32 pixel_ptr += s->stride * 2;
851 }
852
853 /* report success */
854 8 return 0;
855 }
856
857 38 static int ipvideo_decode_block_opcode_0xD_16(IpvideoContext *s, AVFrame *frame)
858 {
859 int x, y;
860 uint16_t P[2];
861 38 uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
862
863 /* 4-color block encoding: each 4x4 block is a different color */
864
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 342 for (y = 0; y < 8; y++) {
865
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 304 if (!(y & 3)) {
866 76 P[0] = bytestream2_get_le16(&s->stream_ptr);
867 76 P[1] = bytestream2_get_le16(&s->stream_ptr);
868 }
869
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 2736 for (x = 0; x < 8; x++)
870 2432 pixel_ptr[x] = P[x >> 2];
871 304 pixel_ptr += s->stride;
872 }
873
874 /* report success */
875 38 return 0;
876 }
877
878 3556 static int ipvideo_decode_block_opcode_0xE_16(IpvideoContext *s, AVFrame *frame)
879 {
880 int x, y;
881 uint16_t pix;
882 3556 uint16_t *pixel_ptr = (uint16_t*)s->pixel_ptr;
883
884 /* 1-color encoding: the whole block is 1 solid color */
885 3556 pix = bytestream2_get_le16(&s->stream_ptr);
886
887
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 32004 for (y = 0; y < 8; y++) {
888
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 256032 for (x = 0; x < 8; x++)
889 227584 pixel_ptr[x] = pix;
890 28448 pixel_ptr += s->stride;
891 }
892
893 /* report success */
894 3556 return 0;
895 }
896
897 static int (* const ipvideo_decode_block[])(IpvideoContext *s, AVFrame *frame) = {
898 ipvideo_decode_block_opcode_0x0, ipvideo_decode_block_opcode_0x1,
899 ipvideo_decode_block_opcode_0x2, ipvideo_decode_block_opcode_0x3,
900 ipvideo_decode_block_opcode_0x4, ipvideo_decode_block_opcode_0x5,
901 ipvideo_decode_block_opcode_0x6, ipvideo_decode_block_opcode_0x7,
902 ipvideo_decode_block_opcode_0x8, ipvideo_decode_block_opcode_0x9,
903 ipvideo_decode_block_opcode_0xA, ipvideo_decode_block_opcode_0xB,
904 ipvideo_decode_block_opcode_0xC, ipvideo_decode_block_opcode_0xD,
905 ipvideo_decode_block_opcode_0xE, ipvideo_decode_block_opcode_0xF,
906 };
907
908 static int (* const ipvideo_decode_block16[])(IpvideoContext *s, AVFrame *frame) = {
909 ipvideo_decode_block_opcode_0x0, ipvideo_decode_block_opcode_0x1,
910 ipvideo_decode_block_opcode_0x2, ipvideo_decode_block_opcode_0x3,
911 ipvideo_decode_block_opcode_0x4, ipvideo_decode_block_opcode_0x5,
912 ipvideo_decode_block_opcode_0x6_16, ipvideo_decode_block_opcode_0x7_16,
913 ipvideo_decode_block_opcode_0x8_16, ipvideo_decode_block_opcode_0x9_16,
914 ipvideo_decode_block_opcode_0xA_16, ipvideo_decode_block_opcode_0xB_16,
915 ipvideo_decode_block_opcode_0xC_16, ipvideo_decode_block_opcode_0xD_16,
916 ipvideo_decode_block_opcode_0xE_16, ipvideo_decode_block_opcode_0x1,
917 };
918
919 ✗ static void ipvideo_format_06_firstpass(IpvideoContext *s, AVFrame *frame, int16_t opcode)
920 {
921 int line;
922
923 ✗ if (!opcode) {
924 ✗ for (line = 0; line < 8; ++line) {
925 ✗ bytestream2_get_buffer(&s->stream_ptr, s->pixel_ptr, 8);
926 ✗ s->pixel_ptr += s->stride;
927 }
928 } else {
929 /* Don't try to copy second_last_frame data on the first frames */
930 ✗ if (s->avctx->frame_number > 2)
931 ✗ copy_from(s, s->second_last_frame, frame, 0, 0);
932 }
933 }
934
935 ✗ static void ipvideo_format_06_secondpass(IpvideoContext *s, AVFrame *frame, int16_t opcode)
936 {
937 int off_x, off_y;
938
939 ✗ if (opcode < 0) {
940 ✗ off_x = ((uint16_t)opcode - 0xC000) % frame->width;
941 ✗ off_y = ((uint16_t)opcode - 0xC000) / frame->width;
942 ✗ copy_from(s, s->last_frame, frame, off_x, off_y);
943 ✗ } else if (opcode > 0) {
944 ✗ off_x = ((uint16_t)opcode - 0x4000) % frame->width;
945 ✗ off_y = ((uint16_t)opcode - 0x4000) / frame->width;
946 ✗ copy_from(s, frame, frame, off_x, off_y);
947 }
948 }
949
950 static void (* const ipvideo_format_06_passes[])(IpvideoContext *s, AVFrame *frame, int16_t op) = {
951 ipvideo_format_06_firstpass, ipvideo_format_06_secondpass,
952 };
953
954 ✗ static void ipvideo_decode_format_06_opcodes(IpvideoContext *s, AVFrame *frame)
955 {
956 int pass, x, y;
957 int16_t opcode;
958 GetByteContext decoding_map_ptr;
959
960 /* this is PAL8, so make the palette available */
961 ✗ memcpy(frame->data[1], s->pal, AVPALETTE_SIZE);
962 ✗ s->stride = frame->linesize[0];
963
964 ✗ s->line_inc = s->stride - 8;
965 ✗ s->upper_motion_limit_offset = (s->avctx->height - 8) * frame->linesize[0]
966 ✗ + (s->avctx->width - 8) * (1 + s->is_16bpp);
967
968 ✗ bytestream2_init(&decoding_map_ptr, s->decoding_map, s->decoding_map_size);
969
970 ✗ for (pass = 0; pass < 2; ++pass) {
971 ✗ bytestream2_seek(&decoding_map_ptr, 0, SEEK_SET);
972 ✗ for (y = 0; y < s->avctx->height; y += 8) {
973 ✗ for (x = 0; x < s->avctx->width; x += 8) {
974 ✗ opcode = bytestream2_get_le16(&decoding_map_ptr);
975
976 ff_tlog(s->avctx,
977 " block @ (%3d, %3d): opcode 0x%X, data ptr offset %d\n",
978 x, y, opcode, bytestream2_tell(&s->stream_ptr));
979
980 ✗ s->pixel_ptr = frame->data[0] + x + y * frame->linesize[0];
981 ✗ ipvideo_format_06_passes[pass](s, frame, opcode);
982 }
983 }
984 }
985
986 ✗ if (bytestream2_get_bytes_left(&s->stream_ptr) > 1) {
987 ✗ av_log(s->avctx, AV_LOG_DEBUG,
988 "decode finished with %d bytes left over\n",
989 bytestream2_get_bytes_left(&s->stream_ptr));
990 }
991 }
992
993 ✗ static void ipvideo_format_10_firstpass(IpvideoContext *s, AVFrame *frame, int16_t opcode)
994 {
995 int line;
996
997 ✗ if (!opcode) {
998 ✗ for (line = 0; line < 8; ++line) {
999 ✗ bytestream2_get_buffer(&s->stream_ptr, s->pixel_ptr, 8);
1000 ✗ s->pixel_ptr += s->stride;
1001 }
1002 }
1003 }
1004
1005 ✗ static void ipvideo_format_10_secondpass(IpvideoContext *s, AVFrame *frame, int16_t opcode)
1006 {
1007 int off_x, off_y;
1008
1009 ✗ if (opcode < 0) {
1010 ✗ off_x = ((uint16_t)opcode - 0xC000) % s->cur_decode_frame->width;
1011 ✗ off_y = ((uint16_t)opcode - 0xC000) / s->cur_decode_frame->width;
1012 ✗ copy_from(s, s->prev_decode_frame, s->cur_decode_frame, off_x, off_y);
1013 ✗ } else if (opcode > 0) {
1014 ✗ off_x = ((uint16_t)opcode - 0x4000) % s->cur_decode_frame->width;
1015 ✗ off_y = ((uint16_t)opcode - 0x4000) / s->cur_decode_frame->width;
1016 ✗ copy_from(s, s->cur_decode_frame, s->cur_decode_frame, off_x, off_y);
1017 }
1018 }
1019
1020 static void (* const ipvideo_format_10_passes[])(IpvideoContext *s, AVFrame *frame, int16_t op) = {
1021 ipvideo_format_10_firstpass, ipvideo_format_10_secondpass,
1022 };
1023
1024 ✗ static void ipvideo_decode_format_10_opcodes(IpvideoContext *s, AVFrame *frame)
1025 {
1026 int pass, x, y, changed_block;
1027 int16_t opcode, skip;
1028 GetByteContext decoding_map_ptr;
1029 GetByteContext skip_map_ptr;
1030
1031 ✗ bytestream2_skip(&s->stream_ptr, 14); /* data starts 14 bytes in */
1032
1033 /* this is PAL8, so make the palette available */
1034 ✗ memcpy(frame->data[1], s->pal, AVPALETTE_SIZE);
1035 ✗ s->stride = frame->linesize[0];
1036
1037 ✗ s->line_inc = s->stride - 8;
1038 ✗ s->upper_motion_limit_offset = (s->avctx->height - 8) * frame->linesize[0]
1039 ✗ + (s->avctx->width - 8) * (1 + s->is_16bpp);
1040
1041 ✗ bytestream2_init(&decoding_map_ptr, s->decoding_map, s->decoding_map_size);
1042 ✗ bytestream2_init(&skip_map_ptr, s->skip_map, s->skip_map_size);
1043
1044 ✗ for (pass = 0; pass < 2; ++pass) {
1045 ✗ bytestream2_seek(&decoding_map_ptr, 0, SEEK_SET);
1046 ✗ bytestream2_seek(&skip_map_ptr, 0, SEEK_SET);
1047 ✗ skip = bytestream2_get_le16(&skip_map_ptr);
1048
1049 ✗ for (y = 0; y < s->avctx->height; y += 8) {
1050 ✗ for (x = 0; x < s->avctx->width; x += 8) {
1051 ✗ s->pixel_ptr = s->cur_decode_frame->data[0] + x + y * s->cur_decode_frame->linesize[0];
1052
1053 ✗ while (skip <= 0) {
1054 ✗ if (skip != -0x8000 && skip) {
1055 ✗ opcode = bytestream2_get_le16(&decoding_map_ptr);
1056 ✗ ipvideo_format_10_passes[pass](s, frame, opcode);
1057 ✗ break;
1058 }
1059 ✗ if (bytestream2_get_bytes_left(&skip_map_ptr) < 2)
1060 ✗ return;
1061 ✗ skip = bytestream2_get_le16(&skip_map_ptr);
1062 }
1063 ✗ skip *= 2;
1064 }
1065 }
1066 }
1067
1068 ✗ bytestream2_seek(&skip_map_ptr, 0, SEEK_SET);
1069 ✗ skip = bytestream2_get_le16(&skip_map_ptr);
1070 ✗ for (y = 0; y < s->avctx->height; y += 8) {
1071 ✗ for (x = 0; x < s->avctx->width; x += 8) {
1072 ✗ changed_block = 0;
1073 ✗ s->pixel_ptr = frame->data[0] + x + y*frame->linesize[0];
1074
1075 ✗ while (skip <= 0) {
1076 ✗ if (skip != -0x8000 && skip) {
1077 ✗ changed_block = 1;
1078 ✗ break;
1079 }
1080 ✗ if (bytestream2_get_bytes_left(&skip_map_ptr) < 2)
1081 ✗ return;
1082 ✗ skip = bytestream2_get_le16(&skip_map_ptr);
1083 }
1084
1085 ✗ if (changed_block) {
1086 ✗ copy_from(s, s->cur_decode_frame, frame, 0, 0);
1087 } else {
1088 /* Don't try to copy last_frame data on the first frame */
1089 ✗ if (s->avctx->frame_number)
1090 ✗ copy_from(s, s->last_frame, frame, 0, 0);
1091 }
1092 ✗ skip *= 2;
1093 }
1094 }
1095
1096 ✗ FFSWAP(AVFrame*, s->prev_decode_frame, s->cur_decode_frame);
1097
1098 ✗ if (bytestream2_get_bytes_left(&s->stream_ptr) > 1) {
1099 ✗ av_log(s->avctx, AV_LOG_DEBUG,
1100 "decode finished with %d bytes left over\n",
1101 bytestream2_get_bytes_left(&s->stream_ptr));
1102 }
1103 }
1104
1105 160 static void ipvideo_decode_format_11_opcodes(IpvideoContext *s, AVFrame *frame)
1106 {
1107 int x, y;
1108 unsigned char opcode;
1109 int ret;
1110 GetBitContext gb;
1111
1112 160 bytestream2_skip(&s->stream_ptr, 14); /* data starts 14 bytes in */
1113
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 160 if (!s->is_16bpp) {
1114 /* this is PAL8, so make the palette available */
1115 110 memcpy(frame->data[1], s->pal, AVPALETTE_SIZE);
1116
1117 110 s->stride = frame->linesize[0];
1118 } else {
1119 50 s->stride = frame->linesize[0] >> 1;
1120 50 s->mv_ptr = s->stream_ptr;
1121 50 bytestream2_skip(&s->mv_ptr, bytestream2_get_le16(&s->stream_ptr));
1122 }
1123 160 s->line_inc = s->stride - 8;
1124 160 s->upper_motion_limit_offset = (s->avctx->height - 8) * frame->linesize[0]
1125 160 + (s->avctx->width - 8) * (1 + s->is_16bpp);
1126
1127 160 init_get_bits(&gb, s->decoding_map, s->decoding_map_size * 8);
1128
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 6560 for (y = 0; y < s->avctx->height; y += 8) {
1129
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 404000 for (x = 0; x < s->avctx->width; x += 8) {
1130
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 397600 if (get_bits_left(&gb) < 4)
1131 ✗ return;
1132 397600 opcode = get_bits(&gb, 4);
1133
1134 ff_tlog(s->avctx,
1135 " block @ (%3d, %3d): encoding 0x%X, data ptr offset %d\n",
1136 x, y, opcode, bytestream2_tell(&s->stream_ptr));
1137
1138
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 397600 if (!s->is_16bpp) {
1139 237600 s->pixel_ptr = frame->data[0] + x
1140 237600 + y*frame->linesize[0];
1141 237600 ret = ipvideo_decode_block[opcode](s, frame);
1142 } else {
1143 160000 s->pixel_ptr = frame->data[0] + x*2
1144 160000 + y*frame->linesize[0];
1145 160000 ret = ipvideo_decode_block16[opcode](s, frame);
1146 }
1147
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 397600 if (ret != 0) {
1148 ✗ av_log(s->avctx, AV_LOG_ERROR, "decode problem on frame %d, @ block (%d, %d)\n",
1149 ✗ s->avctx->frame_number, x, y);
1150 ✗ return;
1151 }
1152 }
1153 }
1154
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 160 if (bytestream2_get_bytes_left(&s->stream_ptr) > 1) {
1155 48 av_log(s->avctx, AV_LOG_DEBUG,
1156 "decode finished with %d bytes left over\n",
1157 bytestream2_get_bytes_left(&s->stream_ptr));
1158 }
1159 }
1160
1161 5 static av_cold int ipvideo_decode_init(AVCodecContext *avctx)
1162 {
1163 5 IpvideoContext *s = avctx->priv_data;
1164
1165 5 s->avctx = avctx;
1166
1167 5 s->is_16bpp = avctx->bits_per_coded_sample == 16;
1168
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 5 avctx->pix_fmt = s->is_16bpp ? AV_PIX_FMT_RGB555 : AV_PIX_FMT_PAL8;
1169
1170 5 ff_hpeldsp_init(&s->hdsp, avctx->flags);
1171
1172 5 s->last_frame = av_frame_alloc();
1173 5 s->second_last_frame = av_frame_alloc();
1174 5 s->cur_decode_frame = av_frame_alloc();
1175 5 s->prev_decode_frame = av_frame_alloc();
1176
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 5 if (!s->last_frame || !s->second_last_frame ||
1177
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 5 !s->cur_decode_frame || !s->prev_decode_frame) {
1178 ✗ return AVERROR(ENOMEM);
1179 }
1180
1181 5 s->cur_decode_frame->width = avctx->width;
1182 5 s->prev_decode_frame->width = avctx->width;
1183 5 s->cur_decode_frame->height = avctx->height;
1184 5 s->prev_decode_frame->height = avctx->height;
1185 5 s->cur_decode_frame->format = avctx->pix_fmt;
1186 5 s->prev_decode_frame->format = avctx->pix_fmt;
1187
1188 5 return 0;
1189 }
1190
1191 160 static int ipvideo_decode_frame(AVCodecContext *avctx,
1192 void *data, int *got_frame,
1193 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 160 AVFrame *frame = data;
1199 int ret;
1200 int send_buffer;
1201 int frame_format;
1202 int video_data_size;
1203
1204
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 160 if (av_packet_get_side_data(avpkt, AV_PKT_DATA_PARAM_CHANGE, NULL)) {
1205 2 av_frame_unref(s->last_frame);
1206 2 av_frame_unref(s->second_last_frame);
1207 2 av_frame_unref(s->cur_decode_frame);
1208 2 av_frame_unref(s->prev_decode_frame);
1209 }
1210
1211
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 160 if (!s->cur_decode_frame->data[0]) {
1212 2 ret = ff_get_buffer(avctx, s->cur_decode_frame, 0);
1213
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 2 if (ret < 0)
1214 ✗ return ret;
1215
1216 2 ret = ff_get_buffer(avctx, s->prev_decode_frame, 0);
1217
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 2 if (ret < 0) {
1218 ✗ av_frame_unref(s->cur_decode_frame);
1219 ✗ return ret;
1220 }
1221 }
1222
1223
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 160 if (buf_size < 8)
1224 ✗ return AVERROR_INVALIDDATA;
1225
1226 160 frame_format = AV_RL8(buf);
1227 160 send_buffer = AV_RL8(buf + 1);
1228 160 video_data_size = AV_RL16(buf + 2);
1229 160 s->decoding_map_size = AV_RL16(buf + 4);
1230 160 s->skip_map_size = AV_RL16(buf + 6);
1231
1232
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 160 switch (frame_format) {
1233 ✗ case 0x06:
1234 ✗ if (s->decoding_map_size) {
1235 ✗ av_log(avctx, AV_LOG_ERROR, "Decoding map for format 0x06\n");
1236 ✗ return AVERROR_INVALIDDATA;
1237 }
1238
1239 ✗ if (s->skip_map_size) {
1240 ✗ av_log(avctx, AV_LOG_ERROR, "Skip map for format 0x06\n");
1241 ✗ return AVERROR_INVALIDDATA;
1242 }
1243
1244 ✗ if (s->is_16bpp) {
1245 ✗ av_log(avctx, AV_LOG_ERROR, "Video format 0x06 does not support 16bpp movies\n");
1246 ✗ return AVERROR_INVALIDDATA;
1247 }
1248
1249 /* Decoding map for 0x06 frame format is at the top of pixeldata */
1250 ✗ s->decoding_map_size = ((s->avctx->width / 8) * (s->avctx->height / 8)) * 2;
1251 ✗ s->decoding_map = buf + 8 + 14; /* 14 bits of op data */
1252 ✗ video_data_size -= s->decoding_map_size + 14;
1253 ✗ if (video_data_size <= 0 || s->decoding_map_size == 0)
1254 ✗ return AVERROR_INVALIDDATA;
1255
1256 ✗ if (buf_size < 8 + s->decoding_map_size + 14 + video_data_size)
1257 ✗ return AVERROR_INVALIDDATA;
1258
1259 ✗ bytestream2_init(&s->stream_ptr, buf + 8 + s->decoding_map_size + 14, video_data_size);
1260
1261 ✗ break;
1262
1263 ✗ case 0x10:
1264 ✗ if (! s->decoding_map_size) {
1265 ✗ av_log(avctx, AV_LOG_ERROR, "Empty decoding map for format 0x10\n");
1266 ✗ return AVERROR_INVALIDDATA;
1267 }
1268
1269 ✗ if (! s->skip_map_size) {
1270 ✗ av_log(avctx, AV_LOG_ERROR, "Empty skip map for format 0x10\n");
1271 ✗ return AVERROR_INVALIDDATA;
1272 }
1273
1274 ✗ if (s->is_16bpp) {
1275 ✗ av_log(avctx, AV_LOG_ERROR, "Video format 0x10 does not support 16bpp movies\n");
1276 ✗ return AVERROR_INVALIDDATA;
1277 }
1278
1279 ✗ if (buf_size < 8 + video_data_size + s->decoding_map_size + s->skip_map_size)
1280 ✗ return AVERROR_INVALIDDATA;
1281
1282 ✗ bytestream2_init(&s->stream_ptr, buf + 8, video_data_size);
1283 ✗ s->decoding_map = buf + 8 + video_data_size;
1284 ✗ s->skip_map = buf + 8 + video_data_size + s->decoding_map_size;
1285
1286 ✗ break;
1287
1288 160 case 0x11:
1289
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 160 if (! s->decoding_map_size) {
1290 ✗ av_log(avctx, AV_LOG_ERROR, "Empty decoding map for format 0x11\n");
1291 ✗ return AVERROR_INVALIDDATA;
1292 }
1293
1294
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 160 if (s->skip_map_size) {
1295 ✗ av_log(avctx, AV_LOG_ERROR, "Skip map for format 0x11\n");
1296 ✗ return AVERROR_INVALIDDATA;
1297 }
1298
1299
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 160 if (buf_size < 8 + video_data_size + s->decoding_map_size)
1300 ✗ return AVERROR_INVALIDDATA;
1301
1302 160 bytestream2_init(&s->stream_ptr, buf + 8, video_data_size);
1303 160 s->decoding_map = buf + 8 + video_data_size;
1304
1305 160 break;
1306
1307 ✗ default:
1308 ✗ av_log(avctx, AV_LOG_ERROR, "Frame type 0x%02X unsupported\n", frame_format);
1309 }
1310
1311 /* ensure we can't overread the packet */
1312
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 160 if (buf_size < 8 + s->decoding_map_size + video_data_size + s->skip_map_size) {
1313 ✗ av_log(avctx, AV_LOG_ERROR, "Invalid IP packet size\n");
1314 ✗ return AVERROR_INVALIDDATA;
1315 }
1316
1317
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 160 if ((ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0)
1318 ✗ return ret;
1319
1320
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 160 if (!s->is_16bpp) {
1321 110 frame->palette_has_changed = ff_copy_palette(s->pal, avpkt, avctx);
1322 }
1323
1324
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 160 switch (frame_format) {
1325 ✗ case 0x06:
1326 ✗ ipvideo_decode_format_06_opcodes(s, frame);
1327 ✗ break;
1328 ✗ case 0x10:
1329 ✗ ipvideo_decode_format_10_opcodes(s, frame);
1330 ✗ break;
1331 160 case 0x11:
1332 160 ipvideo_decode_format_11_opcodes(s, frame);
1333 160 break;
1334 }
1335
1336 160 *got_frame = send_buffer;
1337
1338 /* shuffle frames */
1339 160 av_frame_unref(s->second_last_frame);
1340 160 FFSWAP(AVFrame*, s->second_last_frame, s->last_frame);
1341
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 160 if ((ret = av_frame_ref(s->last_frame, frame)) < 0)
1342 ✗ return ret;
1343
1344 /* report that the buffer was completely consumed */
1345 160 return buf_size;
1346 }
1347
1348 5 static av_cold int ipvideo_decode_end(AVCodecContext *avctx)
1349 {
1350 5 IpvideoContext *s = avctx->priv_data;
1351
1352 5 av_frame_free(&s->last_frame);
1353 5 av_frame_free(&s->second_last_frame);
1354 5 av_frame_free(&s->cur_decode_frame);
1355 5 av_frame_free(&s->prev_decode_frame);
1356
1357 5 return 0;
1358 }
1359
1360 const AVCodec ff_interplay_video_decoder = {
1361 .name = "interplayvideo",
1362 .long_name = NULL_IF_CONFIG_SMALL("Interplay MVE video"),
1363 .type = AVMEDIA_TYPE_VIDEO,
1364 .id = AV_CODEC_ID_INTERPLAY_VIDEO,
1365 .priv_data_size = sizeof(IpvideoContext),
1366 .init = ipvideo_decode_init,
1367 .close = ipvideo_decode_end,
1368 .decode = ipvideo_decode_frame,
1369 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_PARAM_CHANGE,
1370 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
1371 };
1372