blob: e6f43749811ccbf388dc4d9acafcbb463094fa25
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 "internal.h" |
34 | |
35 | #include "ulti_cb.h" |
36 | |
37 | typedef struct UltimotionDecodeContext { |
38 | AVCodecContext *avctx; |
39 | int width, height, blocks; |
40 | AVFrame *frame; |
41 | const uint8_t *ulti_codebook; |
42 | GetByteContext gb; |
43 | } UltimotionDecodeContext; |
44 | |
45 | static av_cold int ulti_decode_init(AVCodecContext *avctx) |
46 | { |
47 | UltimotionDecodeContext *s = avctx->priv_data; |
48 | |
49 | s->avctx = avctx; |
50 | s->width = avctx->width; |
51 | s->height = avctx->height; |
52 | s->blocks = (s->width / 8) * (s->height / 8); |
53 | avctx->pix_fmt = AV_PIX_FMT_YUV410P; |
54 | s->ulti_codebook = ulti_codebook; |
55 | |
56 | s->frame = av_frame_alloc(); |
57 | if (!s->frame) |
58 | return AVERROR(ENOMEM); |
59 | |
60 | return 0; |
61 | } |
62 | |
63 | static av_cold int ulti_decode_end(AVCodecContext *avctx){ |
64 | UltimotionDecodeContext *s = avctx->priv_data; |
65 | |
66 | av_frame_free(&s->frame); |
67 | |
68 | return 0; |
69 | } |
70 | |
71 | static const int block_coords[8] = // 4x4 block coords in 8x8 superblock |
72 | { 0, 0, 0, 4, 4, 4, 4, 0}; |
73 | |
74 | static const int angle_by_index[4] = { 0, 2, 6, 12}; |
75 | |
76 | /* Lookup tables for luma and chroma - used by ulti_convert_yuv() */ |
77 | static const uint8_t ulti_lumas[64] = |
78 | { 0x10, 0x13, 0x17, 0x1A, 0x1E, 0x21, 0x25, 0x28, |
79 | 0x2C, 0x2F, 0x33, 0x36, 0x3A, 0x3D, 0x41, 0x44, |
80 | 0x48, 0x4B, 0x4F, 0x52, 0x56, 0x59, 0x5C, 0x60, |
81 | 0x63, 0x67, 0x6A, 0x6E, 0x71, 0x75, 0x78, 0x7C, |
82 | 0x7F, 0x83, 0x86, 0x8A, 0x8D, 0x91, 0x94, 0x98, |
83 | 0x9B, 0x9F, 0xA2, 0xA5, 0xA9, 0xAC, 0xB0, 0xB3, |
84 | 0xB7, 0xBA, 0xBE, 0xC1, 0xC5, 0xC8, 0xCC, 0xCF, |
85 | 0xD3, 0xD6, 0xDA, 0xDD, 0xE1, 0xE4, 0xE8, 0xEB}; |
86 | |
87 | static const uint8_t ulti_chromas[16] = |
88 | { 0x60, 0x67, 0x6D, 0x73, 0x7A, 0x80, 0x86, 0x8D, |
89 | 0x93, 0x99, 0xA0, 0xA6, 0xAC, 0xB3, 0xB9, 0xC0}; |
90 | |
91 | /* convert Ultimotion YUV block (sixteen 6-bit Y samples and |
92 | two 4-bit chroma samples) into standard YUV and put it into frame */ |
93 | static void ulti_convert_yuv(AVFrame *frame, int x, int y, |
94 | uint8_t *luma,int chroma) |
95 | { |
96 | uint8_t *y_plane, *cr_plane, *cb_plane; |
97 | int i; |
98 | |
99 | y_plane = frame->data[0] + x + y * frame->linesize[0]; |
100 | cr_plane = frame->data[1] + (x / 4) + (y / 4) * frame->linesize[1]; |
101 | cb_plane = frame->data[2] + (x / 4) + (y / 4) * frame->linesize[2]; |
102 | |
103 | cr_plane[0] = ulti_chromas[chroma >> 4]; |
104 | |
105 | cb_plane[0] = ulti_chromas[chroma & 0xF]; |
106 | |
107 | |
108 | for(i = 0; i < 16; i++){ |
109 | y_plane[i & 3] = ulti_lumas[luma[i]]; |
110 | if((i & 3) == 3) { //next row |
111 | y_plane += frame->linesize[0]; |
112 | } |
113 | } |
114 | } |
115 | |
116 | /* generate block like in MS Video1 */ |
117 | static void ulti_pattern(AVFrame *frame, int x, int y, |
118 | int f0, int f1, int Y0, int Y1, int chroma) |
119 | { |
120 | uint8_t Luma[16]; |
121 | int mask, i; |
122 | for(mask = 0x80, i = 0; mask; mask >>= 1, i++) { |
123 | if(f0 & mask) |
124 | Luma[i] = Y1; |
125 | else |
126 | Luma[i] = Y0; |
127 | } |
128 | |
129 | for(mask = 0x80, i = 8; mask; mask >>= 1, i++) { |
130 | if(f1 & mask) |
131 | Luma[i] = Y1; |
132 | else |
133 | Luma[i] = Y0; |
134 | } |
135 | |
136 | ulti_convert_yuv(frame, x, y, Luma, chroma); |
137 | } |
138 | |
139 | /* fill block with some gradient */ |
140 | static void ulti_grad(AVFrame *frame, int x, int y, uint8_t *Y, int chroma, int angle) |
141 | { |
142 | uint8_t Luma[16]; |
143 | if(angle & 8) { //reverse order |
144 | int t; |
145 | angle &= 0x7; |
146 | t = Y[0]; |
147 | Y[0] = Y[3]; |
148 | Y[3] = t; |
149 | t = Y[1]; |
150 | Y[1] = Y[2]; |
151 | Y[2] = t; |
152 | } |
153 | switch(angle){ |
154 | case 0: |
155 | Luma[0] = Y[0]; Luma[1] = Y[1]; Luma[2] = Y[2]; Luma[3] = Y[3]; |
156 | Luma[4] = Y[0]; Luma[5] = Y[1]; Luma[6] = Y[2]; Luma[7] = Y[3]; |
157 | Luma[8] = Y[0]; Luma[9] = Y[1]; Luma[10] = Y[2]; Luma[11] = Y[3]; |
158 | Luma[12] = Y[0]; Luma[13] = Y[1]; Luma[14] = Y[2]; Luma[15] = Y[3]; |
159 | break; |
160 | case 1: |
161 | Luma[0] = Y[1]; Luma[1] = Y[2]; Luma[2] = Y[3]; Luma[3] = Y[3]; |
162 | Luma[4] = Y[0]; Luma[5] = Y[1]; Luma[6] = Y[2]; Luma[7] = Y[3]; |
163 | Luma[8] = Y[0]; Luma[9] = Y[1]; Luma[10] = Y[2]; Luma[11] = Y[3]; |
164 | Luma[12] = Y[0]; Luma[13] = Y[0]; Luma[14] = Y[1]; Luma[15] = Y[2]; |
165 | break; |
166 | case 2: |
167 | Luma[0] = Y[1]; Luma[1] = Y[2]; Luma[2] = Y[3]; Luma[3] = Y[3]; |
168 | Luma[4] = Y[1]; Luma[5] = Y[2]; Luma[6] = Y[2]; Luma[7] = Y[3]; |
169 | Luma[8] = Y[0]; Luma[9] = Y[1]; Luma[10] = Y[1]; Luma[11] = Y[2]; |
170 | Luma[12] = Y[0]; Luma[13] = Y[0]; Luma[14] = Y[1]; Luma[15] = Y[2]; |
171 | break; |
172 | case 3: |
173 | Luma[0] = Y[2]; Luma[1] = Y[3]; Luma[2] = Y[3]; Luma[3] = Y[3]; |
174 | Luma[4] = Y[1]; Luma[5] = Y[2]; Luma[6] = Y[2]; Luma[7] = Y[3]; |
175 | Luma[8] = Y[0]; Luma[9] = Y[1]; Luma[10] = Y[1]; Luma[11] = Y[2]; |
176 | Luma[12] = Y[0]; Luma[13] = Y[0]; Luma[14] = Y[0]; Luma[15] = Y[1]; |
177 | break; |
178 | case 4: |
179 | Luma[0] = Y[3]; Luma[1] = Y[3]; Luma[2] = Y[3]; Luma[3] = Y[3]; |
180 | Luma[4] = Y[2]; Luma[5] = Y[2]; Luma[6] = Y[2]; Luma[7] = Y[2]; |
181 | Luma[8] = Y[1]; Luma[9] = Y[1]; Luma[10] = Y[1]; Luma[11] = Y[1]; |
182 | Luma[12] = Y[0]; Luma[13] = Y[0]; Luma[14] = Y[0]; Luma[15] = Y[0]; |
183 | break; |
184 | case 5: |
185 | Luma[0] = Y[3]; Luma[1] = Y[3]; Luma[2] = Y[3]; Luma[3] = Y[2]; |
186 | Luma[4] = Y[3]; Luma[5] = Y[2]; Luma[6] = Y[2]; Luma[7] = Y[1]; |
187 | Luma[8] = Y[2]; Luma[9] = Y[1]; Luma[10] = Y[1]; Luma[11] = Y[0]; |
188 | Luma[12] = Y[1]; Luma[13] = Y[0]; Luma[14] = Y[0]; Luma[15] = Y[0]; |
189 | break; |
190 | case 6: |
191 | Luma[0] = Y[3]; Luma[1] = Y[3]; Luma[2] = Y[2]; Luma[3] = Y[2]; |
192 | Luma[4] = Y[3]; Luma[5] = Y[2]; Luma[6] = Y[1]; Luma[7] = Y[1]; |
193 | Luma[8] = Y[2]; Luma[9] = Y[2]; Luma[10] = Y[1]; Luma[11] = Y[0]; |
194 | Luma[12] = Y[1]; Luma[13] = Y[1]; Luma[14] = Y[0]; Luma[15] = Y[0]; |
195 | break; |
196 | case 7: |
197 | Luma[0] = Y[3]; Luma[1] = Y[3]; Luma[2] = Y[2]; Luma[3] = Y[1]; |
198 | Luma[4] = Y[3]; Luma[5] = Y[2]; Luma[6] = Y[1]; Luma[7] = Y[0]; |
199 | Luma[8] = Y[3]; Luma[9] = Y[2]; Luma[10] = Y[1]; Luma[11] = Y[0]; |
200 | Luma[12] = Y[2]; Luma[13] = Y[1]; Luma[14] = Y[0]; Luma[15] = Y[0]; |
201 | break; |
202 | default: |
203 | Luma[0] = Y[0]; Luma[1] = Y[0]; Luma[2] = Y[1]; Luma[3] = Y[1]; |
204 | Luma[4] = Y[0]; Luma[5] = Y[0]; Luma[6] = Y[1]; Luma[7] = Y[1]; |
205 | Luma[8] = Y[2]; Luma[9] = Y[2]; Luma[10] = Y[3]; Luma[11] = Y[3]; |
206 | Luma[12] = Y[2]; Luma[13] = Y[2]; Luma[14] = Y[3]; Luma[15] = Y[3]; |
207 | break; |
208 | } |
209 | |
210 | ulti_convert_yuv(frame, x, y, Luma, chroma); |
211 | } |
212 | |
213 | static int ulti_decode_frame(AVCodecContext *avctx, |
214 | void *data, int *got_frame, |
215 | AVPacket *avpkt) |
216 | { |
217 | const uint8_t *buf = avpkt->data; |
218 | int buf_size = avpkt->size; |
219 | UltimotionDecodeContext *s=avctx->priv_data; |
220 | int modifier = 0; |
221 | int uniq = 0; |
222 | int mode = 0; |
223 | int blocks = 0; |
224 | int done = 0; |
225 | int x = 0, y = 0; |
226 | int i, ret; |
227 | int skip; |
228 | int tmp; |
229 | |
230 | if ((ret = ff_reget_buffer(avctx, s->frame)) < 0) |
231 | return ret; |
232 | |
233 | bytestream2_init(&s->gb, buf, buf_size); |
234 | |
235 | while(!done) { |
236 | int idx; |
237 | if(blocks >= s->blocks || y >= s->height) |
238 | break;//all blocks decoded |
239 | |
240 | if (bytestream2_get_bytes_left(&s->gb) < 1) |
241 | goto err; |
242 | idx = bytestream2_get_byteu(&s->gb); |
243 | if((idx & 0xF8) == 0x70) { |
244 | switch(idx) { |
245 | case 0x70: //change modifier |
246 | modifier = bytestream2_get_byte(&s->gb); |
247 | if(modifier>1) |
248 | av_log(avctx, AV_LOG_INFO, "warning: modifier must be 0 or 1, got %i\n", modifier); |
249 | break; |
250 | case 0x71: // set uniq flag |
251 | uniq = 1; |
252 | break; |
253 | case 0x72: //toggle mode |
254 | mode = !mode; |
255 | break; |
256 | case 0x73: //end-of-frame |
257 | done = 1; |
258 | break; |
259 | case 0x74: //skip some blocks |
260 | skip = bytestream2_get_byte(&s->gb); |
261 | if ((blocks + skip) >= s->blocks) |
262 | break; |
263 | blocks += skip; |
264 | x += skip * 8; |
265 | while(x >= s->width) { |
266 | x -= s->width; |
267 | y += 8; |
268 | } |
269 | break; |
270 | default: |
271 | av_log(avctx, AV_LOG_INFO, "warning: unknown escape 0x%02X\n", idx); |
272 | } |
273 | } else { //handle one block |
274 | int code; |
275 | int cf; |
276 | int angle = 0; |
277 | uint8_t Y[4]; // luma samples of block |
278 | int tx = 0, ty = 0; //coords of subblock |
279 | int chroma = 0; |
280 | if (mode || uniq) { |
281 | uniq = 0; |
282 | cf = 1; |
283 | chroma = 0; |
284 | } else { |
285 | cf = 0; |
286 | if (idx) { |
287 | chroma = bytestream2_get_byte(&s->gb); |
288 | } |
289 | } |
290 | for (i = 0; i < 4; i++) { // for every subblock |
291 | code = (idx >> (6 - i*2)) & 3; //extract 2 bits |
292 | if(!code) //skip subblock |
293 | continue; |
294 | if(cf) { |
295 | chroma = bytestream2_get_byte(&s->gb); |
296 | } |
297 | tx = x + block_coords[i * 2]; |
298 | ty = y + block_coords[(i * 2) + 1]; |
299 | switch(code) { |
300 | case 1: |
301 | tmp = bytestream2_get_byte(&s->gb); |
302 | |
303 | angle = angle_by_index[(tmp >> 6) & 0x3]; |
304 | |
305 | Y[0] = tmp & 0x3F; |
306 | Y[1] = Y[0]; |
307 | |
308 | if (angle) { |
309 | Y[2] = Y[0]+1; |
310 | if (Y[2] > 0x3F) |
311 | Y[2] = 0x3F; |
312 | Y[3] = Y[2]; |
313 | } else { |
314 | Y[2] = Y[0]; |
315 | Y[3] = Y[0]; |
316 | } |
317 | break; |
318 | |
319 | case 2: |
320 | if (modifier) { // unpack four luma samples |
321 | tmp = bytestream2_get_be24(&s->gb); |
322 | |
323 | Y[0] = (tmp >> 18) & 0x3F; |
324 | Y[1] = (tmp >> 12) & 0x3F; |
325 | Y[2] = (tmp >> 6) & 0x3F; |
326 | Y[3] = tmp & 0x3F; |
327 | angle = 16; |
328 | } else { // retrieve luma samples from codebook |
329 | tmp = bytestream2_get_be16(&s->gb); |
330 | |
331 | angle = (tmp >> 12) & 0xF; |
332 | tmp &= 0xFFF; |
333 | tmp <<= 2; |
334 | Y[0] = s->ulti_codebook[tmp]; |
335 | Y[1] = s->ulti_codebook[tmp + 1]; |
336 | Y[2] = s->ulti_codebook[tmp + 2]; |
337 | Y[3] = s->ulti_codebook[tmp + 3]; |
338 | } |
339 | break; |
340 | |
341 | case 3: |
342 | if (modifier) { // all 16 luma samples |
343 | uint8_t Luma[16]; |
344 | |
345 | if (bytestream2_get_bytes_left(&s->gb) < 12) |
346 | goto err; |
347 | tmp = bytestream2_get_be24u(&s->gb); |
348 | Luma[0] = (tmp >> 18) & 0x3F; |
349 | Luma[1] = (tmp >> 12) & 0x3F; |
350 | Luma[2] = (tmp >> 6) & 0x3F; |
351 | Luma[3] = tmp & 0x3F; |
352 | |
353 | tmp = bytestream2_get_be24u(&s->gb); |
354 | Luma[4] = (tmp >> 18) & 0x3F; |
355 | Luma[5] = (tmp >> 12) & 0x3F; |
356 | Luma[6] = (tmp >> 6) & 0x3F; |
357 | Luma[7] = tmp & 0x3F; |
358 | |
359 | tmp = bytestream2_get_be24u(&s->gb); |
360 | Luma[8] = (tmp >> 18) & 0x3F; |
361 | Luma[9] = (tmp >> 12) & 0x3F; |
362 | Luma[10] = (tmp >> 6) & 0x3F; |
363 | Luma[11] = tmp & 0x3F; |
364 | |
365 | tmp = bytestream2_get_be24u(&s->gb); |
366 | Luma[12] = (tmp >> 18) & 0x3F; |
367 | Luma[13] = (tmp >> 12) & 0x3F; |
368 | Luma[14] = (tmp >> 6) & 0x3F; |
369 | Luma[15] = tmp & 0x3F; |
370 | |
371 | ulti_convert_yuv(s->frame, tx, ty, Luma, chroma); |
372 | } else { |
373 | if (bytestream2_get_bytes_left(&s->gb) < 4) |
374 | goto err; |
375 | tmp = bytestream2_get_byteu(&s->gb); |
376 | if(tmp & 0x80) { |
377 | angle = (tmp >> 4) & 0x7; |
378 | tmp = (tmp << 8) + bytestream2_get_byteu(&s->gb); |
379 | Y[0] = (tmp >> 6) & 0x3F; |
380 | Y[1] = tmp & 0x3F; |
381 | Y[2] = bytestream2_get_byteu(&s->gb) & 0x3F; |
382 | Y[3] = bytestream2_get_byteu(&s->gb) & 0x3F; |
383 | ulti_grad(s->frame, tx, ty, Y, chroma, angle); //draw block |
384 | } else { // some patterns |
385 | int f0 = tmp; |
386 | int f1 = bytestream2_get_byteu(&s->gb); |
387 | Y[0] = bytestream2_get_byteu(&s->gb) & 0x3F; |
388 | Y[1] = bytestream2_get_byteu(&s->gb) & 0x3F; |
389 | ulti_pattern(s->frame, tx, ty, f0, f1, Y[0], Y[1], chroma); |
390 | } |
391 | } |
392 | break; |
393 | } |
394 | if(code != 3) |
395 | ulti_grad(s->frame, tx, ty, Y, chroma, angle); // draw block |
396 | } |
397 | blocks++; |
398 | x += 8; |
399 | if(x >= s->width) { |
400 | x = 0; |
401 | y += 8; |
402 | } |
403 | } |
404 | } |
405 | |
406 | *got_frame = 1; |
407 | if ((ret = av_frame_ref(data, s->frame)) < 0) |
408 | return ret; |
409 | |
410 | return buf_size; |
411 | |
412 | err: |
413 | av_log(avctx, AV_LOG_ERROR, |
414 | "Insufficient data\n"); |
415 | return AVERROR_INVALIDDATA; |
416 | } |
417 | |
418 | AVCodec ff_ulti_decoder = { |
419 | .name = "ultimotion", |
420 | .long_name = NULL_IF_CONFIG_SMALL("IBM UltiMotion"), |
421 | .type = AVMEDIA_TYPE_VIDEO, |
422 | .id = AV_CODEC_ID_ULTI, |
423 | .priv_data_size = sizeof(UltimotionDecodeContext), |
424 | .init = ulti_decode_init, |
425 | .close = ulti_decode_end, |
426 | .decode = ulti_decode_frame, |
427 | .capabilities = AV_CODEC_CAP_DR1, |
428 | }; |
429 |