FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/ulti.c
Date: 2022-07-04 19:11:22
Exec Total Coverage
Lines: 201 257 78.2%
Branches: 66 87 75.9%
Line Branch Exec Source
1 /*
2 * IBM Ultimotion Video Decoder
3 * Copyright (C) 2004 Konstantin Shishkov
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 * IBM Ultimotion Video Decoder.
25 */
26
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30
31 #include "avcodec.h"
32 #include "bytestream.h"
33 #include "codec_internal.h"
34 #include "internal.h"
35
36 #include "ulti_cb.h"
37
38 typedef struct UltimotionDecodeContext {
39 AVCodecContext *avctx;
40 int width, height, blocks;
41 AVFrame *frame;
42 const uint8_t *ulti_codebook;
43 GetByteContext gb;
44 } UltimotionDecodeContext;
45
46 2 static av_cold int ulti_decode_init(AVCodecContext *avctx)
47 {
48 2 UltimotionDecodeContext *s = avctx->priv_data;
49
50 2 s->avctx = avctx;
51 2 s->width = avctx->width;
52 2 s->height = avctx->height;
53 2 s->blocks = (s->width / 8) * (s->height / 8);
54
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 2 if (s->blocks == 0)
55 ✗ return AVERROR_INVALIDDATA;
56 2 avctx->pix_fmt = AV_PIX_FMT_YUV410P;
57 2 s->ulti_codebook = ulti_codebook;
58
59 2 s->frame = av_frame_alloc();
60
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 2 if (!s->frame)
61 ✗ return AVERROR(ENOMEM);
62
63 2 return 0;
64 }
65
66 2 static av_cold int ulti_decode_end(AVCodecContext *avctx)
67 {
68 2 UltimotionDecodeContext *s = avctx->priv_data;
69
70 2 av_frame_free(&s->frame);
71
72 2 return 0;
73 }
74
75 static const int block_coords[8] = // 4x4 block coords in 8x8 superblock
76 { 0, 0, 0, 4, 4, 4, 4, 0};
77
78 static const int angle_by_index[4] = { 0, 2, 6, 12};
79
80 /* Lookup tables for luma and chroma - used by ulti_convert_yuv() */
81 static const uint8_t ulti_lumas[64] =
82 { 0x10, 0x13, 0x17, 0x1A, 0x1E, 0x21, 0x25, 0x28,
83 0x2C, 0x2F, 0x33, 0x36, 0x3A, 0x3D, 0x41, 0x44,
84 0x48, 0x4B, 0x4F, 0x52, 0x56, 0x59, 0x5C, 0x60,
85 0x63, 0x67, 0x6A, 0x6E, 0x71, 0x75, 0x78, 0x7C,
86 0x7F, 0x83, 0x86, 0x8A, 0x8D, 0x91, 0x94, 0x98,
87 0x9B, 0x9F, 0xA2, 0xA5, 0xA9, 0xAC, 0xB0, 0xB3,
88 0xB7, 0xBA, 0xBE, 0xC1, 0xC5, 0xC8, 0xCC, 0xCF,
89 0xD3, 0xD6, 0xDA, 0xDD, 0xE1, 0xE4, 0xE8, 0xEB};
90
91 static const uint8_t ulti_chromas[16] =
92 { 0x60, 0x67, 0x6D, 0x73, 0x7A, 0x80, 0x86, 0x8D,
93 0x93, 0x99, 0xA0, 0xA6, 0xAC, 0xB3, 0xB9, 0xC0};
94
95 /* convert Ultimotion YUV block (sixteen 6-bit Y samples and
96 two 4-bit chroma samples) into standard YUV and put it into frame */
97 206695 static void ulti_convert_yuv(AVFrame *frame, int x, int y,
98 uint8_t *luma,int chroma)
99 {
100 uint8_t *y_plane, *cr_plane, *cb_plane;
101 int i;
102
103 206695 y_plane = frame->data[0] + x + y * frame->linesize[0];
104 206695 cr_plane = frame->data[1] + (x / 4) + (y / 4) * frame->linesize[1];
105 206695 cb_plane = frame->data[2] + (x / 4) + (y / 4) * frame->linesize[2];
106
107 206695 cr_plane[0] = ulti_chromas[chroma >> 4];
108
109 206695 cb_plane[0] = ulti_chromas[chroma & 0xF];
110
111
112
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 3513815 for(i = 0; i < 16; i++){
113 3307120 y_plane[i & 3] = ulti_lumas[luma[i]];
114
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 3307120 if((i & 3) == 3) { //next row
115 826780 y_plane += frame->linesize[0];
116 }
117 }
118 206695 }
119
120 /* generate block like in MS Video1 */
121 43140 static void ulti_pattern(AVFrame *frame, int x, int y,
122 int f0, int f1, int Y0, int Y1, int chroma)
123 {
124 uint8_t Luma[16];
125 int mask, i;
126
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 388260 for(mask = 0x80, i = 0; mask; mask >>= 1, i++) {
127
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 345120 if(f0 & mask)
128 146257 Luma[i] = Y1;
129 else
130 198863 Luma[i] = Y0;
131 }
132
133
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 388260 for(mask = 0x80, i = 8; mask; mask >>= 1, i++) {
134
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 345120 if(f1 & mask)
135 185919 Luma[i] = Y1;
136 else
137 159201 Luma[i] = Y0;
138 }
139
140 43140 ulti_convert_yuv(frame, x, y, Luma, chroma);
141 43140 }
142
143 /* fill block with some gradient */
144 163555 static void ulti_grad(AVFrame *frame, int x, int y, uint8_t *Y, int chroma, int angle)
145 {
146 uint8_t Luma[16];
147
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 163555 if(angle & 8) { //reverse order
148 int t;
149 56848 angle &= 0x7;
150 56848 t = Y[0];
151 56848 Y[0] = Y[3];
152 56848 Y[3] = t;
153 56848 t = Y[1];
154 56848 Y[1] = Y[2];
155 56848 Y[2] = t;
156 }
157
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 163555 switch(angle){
158 44413 case 0:
159 44413 Luma[0] = Y[0]; Luma[1] = Y[1]; Luma[2] = Y[2]; Luma[3] = Y[3];
160 44413 Luma[4] = Y[0]; Luma[5] = Y[1]; Luma[6] = Y[2]; Luma[7] = Y[3];
161 44413 Luma[8] = Y[0]; Luma[9] = Y[1]; Luma[10] = Y[2]; Luma[11] = Y[3];
162 44413 Luma[12] = Y[0]; Luma[13] = Y[1]; Luma[14] = Y[2]; Luma[15] = Y[3];
163 44413 break;
164 4503 case 1:
165 4503 Luma[0] = Y[1]; Luma[1] = Y[2]; Luma[2] = Y[3]; Luma[3] = Y[3];
166 4503 Luma[4] = Y[0]; Luma[5] = Y[1]; Luma[6] = Y[2]; Luma[7] = Y[3];
167 4503 Luma[8] = Y[0]; Luma[9] = Y[1]; Luma[10] = Y[2]; Luma[11] = Y[3];
168 4503 Luma[12] = Y[0]; Luma[13] = Y[0]; Luma[14] = Y[1]; Luma[15] = Y[2];
169 4503 break;
170 8134 case 2:
171 8134 Luma[0] = Y[1]; Luma[1] = Y[2]; Luma[2] = Y[3]; Luma[3] = Y[3];
172 8134 Luma[4] = Y[1]; Luma[5] = Y[2]; Luma[6] = Y[2]; Luma[7] = Y[3];
173 8134 Luma[8] = Y[0]; Luma[9] = Y[1]; Luma[10] = Y[1]; Luma[11] = Y[2];
174 8134 Luma[12] = Y[0]; Luma[13] = Y[0]; Luma[14] = Y[1]; Luma[15] = Y[2];
175 8134 break;
176 8428 case 3:
177 8428 Luma[0] = Y[2]; Luma[1] = Y[3]; Luma[2] = Y[3]; Luma[3] = Y[3];
178 8428 Luma[4] = Y[1]; Luma[5] = Y[2]; Luma[6] = Y[2]; Luma[7] = Y[3];
179 8428 Luma[8] = Y[0]; Luma[9] = Y[1]; Luma[10] = Y[1]; Luma[11] = Y[2];
180 8428 Luma[12] = Y[0]; Luma[13] = Y[0]; Luma[14] = Y[0]; Luma[15] = Y[1];
181 8428 break;
182 75596 case 4:
183 75596 Luma[0] = Y[3]; Luma[1] = Y[3]; Luma[2] = Y[3]; Luma[3] = Y[3];
184 75596 Luma[4] = Y[2]; Luma[5] = Y[2]; Luma[6] = Y[2]; Luma[7] = Y[2];
185 75596 Luma[8] = Y[1]; Luma[9] = Y[1]; Luma[10] = Y[1]; Luma[11] = Y[1];
186 75596 Luma[12] = Y[0]; Luma[13] = Y[0]; Luma[14] = Y[0]; Luma[15] = Y[0];
187 75596 break;
188 7636 case 5:
189 7636 Luma[0] = Y[3]; Luma[1] = Y[3]; Luma[2] = Y[3]; Luma[3] = Y[2];
190 7636 Luma[4] = Y[3]; Luma[5] = Y[2]; Luma[6] = Y[2]; Luma[7] = Y[1];
191 7636 Luma[8] = Y[2]; Luma[9] = Y[1]; Luma[10] = Y[1]; Luma[11] = Y[0];
192 7636 Luma[12] = Y[1]; Luma[13] = Y[0]; Luma[14] = Y[0]; Luma[15] = Y[0];
193 7636 break;
194 10624 case 6:
195 10624 Luma[0] = Y[3]; Luma[1] = Y[3]; Luma[2] = Y[2]; Luma[3] = Y[2];
196 10624 Luma[4] = Y[3]; Luma[5] = Y[2]; Luma[6] = Y[1]; Luma[7] = Y[1];
197 10624 Luma[8] = Y[2]; Luma[9] = Y[2]; Luma[10] = Y[1]; Luma[11] = Y[0];
198 10624 Luma[12] = Y[1]; Luma[13] = Y[1]; Luma[14] = Y[0]; Luma[15] = Y[0];
199 10624 break;
200 4221 case 7:
201 4221 Luma[0] = Y[3]; Luma[1] = Y[3]; Luma[2] = Y[2]; Luma[3] = Y[1];
202 4221 Luma[4] = Y[3]; Luma[5] = Y[2]; Luma[6] = Y[1]; Luma[7] = Y[0];
203 4221 Luma[8] = Y[3]; Luma[9] = Y[2]; Luma[10] = Y[1]; Luma[11] = Y[0];
204 4221 Luma[12] = Y[2]; Luma[13] = Y[1]; Luma[14] = Y[0]; Luma[15] = Y[0];
205 4221 break;
206 ✗ default:
207 ✗ Luma[0] = Y[0]; Luma[1] = Y[0]; Luma[2] = Y[1]; Luma[3] = Y[1];
208 ✗ Luma[4] = Y[0]; Luma[5] = Y[0]; Luma[6] = Y[1]; Luma[7] = Y[1];
209 ✗ Luma[8] = Y[2]; Luma[9] = Y[2]; Luma[10] = Y[3]; Luma[11] = Y[3];
210 ✗ Luma[12] = Y[2]; Luma[13] = Y[2]; Luma[14] = Y[3]; Luma[15] = Y[3];
211 ✗ break;
212 }
213
214 163555 ulti_convert_yuv(frame, x, y, Luma, chroma);
215 163555 }
216
217 62 static int ulti_decode_frame(AVCodecContext *avctx, AVFrame *rframe,
218 int *got_frame, AVPacket *avpkt)
219 {
220 62 const uint8_t *buf = avpkt->data;
221 62 int buf_size = avpkt->size;
222 62 UltimotionDecodeContext *s=avctx->priv_data;
223 62 int modifier = 0;
224 62 int uniq = 0;
225 62 int mode = 0;
226 62 int blocks = 0;
227 62 int done = 0;
228 62 int x = 0, y = 0;
229 int i, ret;
230 int skip;
231 int tmp;
232
233
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 62 if ((ret = ff_reget_buffer(avctx, s->frame, 0)) < 0)
234 ✗ return ret;
235
236 62 bytestream2_init(&s->gb, buf, buf_size);
237
238
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 86713 while(!done) {
239 int idx;
240
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 86713 if(blocks >= s->blocks || y >= s->height)
241 break;//all blocks decoded
242
243
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 86651 if (bytestream2_get_bytes_left(&s->gb) < 1)
244 ✗ goto err;
245 86651 idx = bytestream2_get_byteu(&s->gb);
246
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 86651 if((idx & 0xF8) == 0x70) {
247
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 17504 switch(idx) {
248 ✗ case 0x70: //change modifier
249 ✗ modifier = bytestream2_get_byte(&s->gb);
250 ✗ if(modifier>1)
251 ✗ av_log(avctx, AV_LOG_INFO, "warning: modifier must be 0 or 1, got %i\n", modifier);
252 ✗ break;
253 4735 case 0x71: // set uniq flag
254 4735 uniq = 1;
255 4735 break;
256 11510 case 0x72: //toggle mode
257 11510 mode = !mode;
258 11510 break;
259 ✗ case 0x73: //end-of-frame
260 ✗ done = 1;
261 ✗ break;
262 1259 case 0x74: //skip some blocks
263 1259 skip = bytestream2_get_byte(&s->gb);
264
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 1259 if ((blocks + skip) >= s->blocks)
265 ✗ break;
266 1259 blocks += skip;
267 1259 x += skip * 8;
268
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 1616 while(x >= s->width) {
269 357 x -= s->width;
270 357 y += 8;
271 }
272 1259 break;
273 ✗ default:
274 ✗ av_log(avctx, AV_LOG_INFO, "warning: unknown escape 0x%02X\n", idx);
275 }
276 } else { //handle one block
277 int code;
278 int cf;
279 69147 int angle = 0;
280 uint8_t Y[4]; // luma samples of block
281 69147 int tx = 0, ty = 0; //coords of subblock
282 69147 int chroma = 0;
283
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 69147 if (mode || uniq) {
284 28189 uniq = 0;
285 28189 cf = 1;
286 28189 chroma = 0;
287 } else {
288 40958 cf = 0;
289
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 40958 if (idx) {
290 39095 chroma = bytestream2_get_byte(&s->gb);
291 }
292 }
293
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 345735 for (i = 0; i < 4; i++) { // for every subblock
294 276588 code = (idx >> (6 - i*2)) & 3; //extract 2 bits
295
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 276588 if(!code) //skip subblock
296 69893 continue;
297
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 206695 if(cf) {
298 89307 chroma = bytestream2_get_byte(&s->gb);
299 }
300 206695 tx = x + block_coords[i * 2];
301 206695 ty = y + block_coords[(i * 2) + 1];
302
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 206695 switch(code) {
303 36515 case 1:
304 36515 tmp = bytestream2_get_byte(&s->gb);
305
306 36515 angle = angle_by_index[(tmp >> 6) & 0x3];
307
308 36515 Y[0] = tmp & 0x3F;
309 36515 Y[1] = Y[0];
310
311
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 36515 if (angle) {
312 9385 Y[2] = Y[0]+1;
313
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 9385 if (Y[2] > 0x3F)
314 ✗ Y[2] = 0x3F;
315 9385 Y[3] = Y[2];
316 } else {
317 27130 Y[2] = Y[0];
318 27130 Y[3] = Y[0];
319 }
320 36515 break;
321
322 110712 case 2:
323
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 110712 if (modifier) { // unpack four luma samples
324 ✗ tmp = bytestream2_get_be24(&s->gb);
325
326 ✗ Y[0] = (tmp >> 18) & 0x3F;
327 ✗ Y[1] = (tmp >> 12) & 0x3F;
328 ✗ Y[2] = (tmp >> 6) & 0x3F;
329 ✗ Y[3] = tmp & 0x3F;
330 ✗ angle = 16;
331 } else { // retrieve luma samples from codebook
332 110712 tmp = bytestream2_get_be16(&s->gb);
333
334 110712 angle = (tmp >> 12) & 0xF;
335 110712 tmp &= 0xFFF;
336 110712 tmp <<= 2;
337 110712 Y[0] = s->ulti_codebook[tmp];
338 110712 Y[1] = s->ulti_codebook[tmp + 1];
339 110712 Y[2] = s->ulti_codebook[tmp + 2];
340 110712 Y[3] = s->ulti_codebook[tmp + 3];
341 }
342 110712 break;
343
344 59468 case 3:
345
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 59468 if (modifier) { // all 16 luma samples
346 uint8_t Luma[16];
347
348 ✗ if (bytestream2_get_bytes_left(&s->gb) < 12)
349 ✗ goto err;
350 ✗ tmp = bytestream2_get_be24u(&s->gb);
351 ✗ Luma[0] = (tmp >> 18) & 0x3F;
352 ✗ Luma[1] = (tmp >> 12) & 0x3F;
353 ✗ Luma[2] = (tmp >> 6) & 0x3F;
354 ✗ Luma[3] = tmp & 0x3F;
355
356 ✗ tmp = bytestream2_get_be24u(&s->gb);
357 ✗ Luma[4] = (tmp >> 18) & 0x3F;
358 ✗ Luma[5] = (tmp >> 12) & 0x3F;
359 ✗ Luma[6] = (tmp >> 6) & 0x3F;
360 ✗ Luma[7] = tmp & 0x3F;
361
362 ✗ tmp = bytestream2_get_be24u(&s->gb);
363 ✗ Luma[8] = (tmp >> 18) & 0x3F;
364 ✗ Luma[9] = (tmp >> 12) & 0x3F;
365 ✗ Luma[10] = (tmp >> 6) & 0x3F;
366 ✗ Luma[11] = tmp & 0x3F;
367
368 ✗ tmp = bytestream2_get_be24u(&s->gb);
369 ✗ Luma[12] = (tmp >> 18) & 0x3F;
370 ✗ Luma[13] = (tmp >> 12) & 0x3F;
371 ✗ Luma[14] = (tmp >> 6) & 0x3F;
372 ✗ Luma[15] = tmp & 0x3F;
373
374 ✗ ulti_convert_yuv(s->frame, tx, ty, Luma, chroma);
375 } else {
376
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 59468 if (bytestream2_get_bytes_left(&s->gb) < 4)
377 ✗ goto err;
378 59468 tmp = bytestream2_get_byteu(&s->gb);
379
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 59468 if(tmp & 0x80) {
380 16328 angle = (tmp >> 4) & 0x7;
381 16328 tmp = (tmp << 8) + bytestream2_get_byteu(&s->gb);
382 16328 Y[0] = (tmp >> 6) & 0x3F;
383 16328 Y[1] = tmp & 0x3F;
384 16328 Y[2] = bytestream2_get_byteu(&s->gb) & 0x3F;
385 16328 Y[3] = bytestream2_get_byteu(&s->gb) & 0x3F;
386 16328 ulti_grad(s->frame, tx, ty, Y, chroma, angle); //draw block
387 } else { // some patterns
388 43140 int f0 = tmp;
389 43140 int f1 = bytestream2_get_byteu(&s->gb);
390 43140 Y[0] = bytestream2_get_byteu(&s->gb) & 0x3F;
391 43140 Y[1] = bytestream2_get_byteu(&s->gb) & 0x3F;
392 43140 ulti_pattern(s->frame, tx, ty, f0, f1, Y[0], Y[1], chroma);
393 }
394 }
395 59468 break;
396 }
397
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 206695 if(code != 3)
398 147227 ulti_grad(s->frame, tx, ty, Y, chroma, angle); // draw block
399 }
400 69147 blocks++;
401 69147 x += 8;
402
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 69147 if(x >= s->width) {
403 1503 x = 0;
404 1503 y += 8;
405 }
406 }
407 }
408
409 62 *got_frame = 1;
410
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 62 if ((ret = av_frame_ref(rframe, s->frame)) < 0)
411 ✗ return ret;
412
413 62 return buf_size;
414
415 ✗ err:
416 ✗ av_log(avctx, AV_LOG_ERROR,
417 "Insufficient data\n");
418 ✗ return AVERROR_INVALIDDATA;
419 }
420
421 const FFCodec ff_ulti_decoder = {
422 .p.name = "ultimotion",
423 .p.long_name = NULL_IF_CONFIG_SMALL("IBM UltiMotion"),
424 .p.type = AVMEDIA_TYPE_VIDEO,
425 .p.id = AV_CODEC_ID_ULTI,
426 .priv_data_size = sizeof(UltimotionDecodeContext),
427 .init = ulti_decode_init,
428 .close = ulti_decode_end,
429 FF_CODEC_DECODE_CB(ulti_decode_frame),
430 .p.capabilities = AV_CODEC_CAP_DR1,
431 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
432 };
433