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Imported Debian version 2.4.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / ulti.c
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2ba45a60
DM		 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
37typedef 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
45static 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
63static 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
71static const int block_coords[8] = // 4x4 block coords in 8x8 superblock
72 { 0, 0, 0, 4, 4, 4, 4, 0};
73
74static const int angle_by_index[4] = { 0, 2, 6, 12};
75
76/* Lookup tables for luma and chroma - used by ulti_convert_yuv() */
77static 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
87static 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 */
93static 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 */
117static 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 */
140static 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
213static 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, f1;
386 f0 = bytestream2_get_byteu(&s->gb);
387 f1 = tmp;
388 Y[0] = bytestream2_get_byteu(&s->gb) & 0x3F;
389 Y[1] = bytestream2_get_byteu(&s->gb) & 0x3F;
390 ulti_pattern(s->frame, tx, ty, f1, f0, Y[0], Y[1], chroma);
391 }
392 }
393 break;
394 }
395 if(code != 3)
396 ulti_grad(s->frame, tx, ty, Y, chroma, angle); // draw block
397 }
398 blocks++;
399 x += 8;
400 if(x >= s->width) {
401 x = 0;
402 y += 8;
403 }
404 }
405 }
406
407 *got_frame = 1;
408 if ((ret = av_frame_ref(data, s->frame)) < 0)
409 return ret;
410
411 return buf_size;
412
413err:
414 av_log(avctx, AV_LOG_ERROR,
415 "Insufficient data\n");
416 return AVERROR_INVALIDDATA;
417}
418
419AVCodec ff_ulti_decoder = {
420 .name = "ultimotion",
421 .long_name = NULL_IF_CONFIG_SMALL("IBM UltiMotion"),
422 .type = AVMEDIA_TYPE_VIDEO,
423 .id = AV_CODEC_ID_ULTI,
424 .priv_data_size = sizeof(UltimotionDecodeContext),
425 .init = ulti_decode_init,
426 .close = ulti_decode_end,
427 .decode = ulti_decode_frame,
428 .capabilities = CODEC_CAP_DR1,
429};
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