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Move/add COSTABLE/SINTABLE macros to dsputil to add extern definitions
[FFMpeg-mirror/lagarith.git] / libavcodec / cinepak.c
blob45ca1a93e32d7dd150d6e245d4abd7d4edd03328
1 /*
2 * Cinepak 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 libavcodec/cinepak.c
24 * Cinepak video decoder
25 * by Ewald Snel <ewald@rambo.its.tudelft.nl>
26 * For more information on the Cinepak algorithm, visit:
27 * http://www.csse.monash.edu.au/~timf/
28 * For more information on the quirky data inside Sega FILM/CPK files, visit:
29 * http://wiki.multimedia.cx/index.php?title=Sega_FILM
30 */
31
32 #include <stdio.h>
33 #include <stdlib.h>
34 #include <string.h>
35
36 #include "libavutil/intreadwrite.h"
37 #include "avcodec.h"
38
39
40 typedef struct {
41 uint8_t y0, y1, y2, y3;
42 uint8_t u, v;
43 } cvid_codebook;
44
45 #define MAX_STRIPS 32
46
47 typedef struct {
48 uint16_t id;
49 uint16_t x1, y1;
50 uint16_t x2, y2;
51 cvid_codebook v4_codebook[256];
52 cvid_codebook v1_codebook[256];
53 } cvid_strip;
54
55 typedef struct CinepakContext {
56
57 AVCodecContext *avctx;
58 AVFrame frame;
59
60 const unsigned char *data;
61 int size;
62
63 int width, height;
64
65 int palette_video;
66 cvid_strip strips[MAX_STRIPS];
67
68 int sega_film_skip_bytes;
69
70 } CinepakContext;
71
72 static void cinepak_decode_codebook (cvid_codebook *codebook,
73 int chunk_id, int size, const uint8_t *data)
74 {
75 const uint8_t *eod = (data + size);
76 uint32_t flag, mask;
77 int i, n;
78
79 /* check if this chunk contains 4- or 6-element vectors */
80 n = (chunk_id & 0x04) ? 4 : 6;
81 flag = 0;
82 mask = 0;
83
84 for (i=0; i < 256; i++) {
85 if ((chunk_id & 0x01) && !(mask >>= 1)) {
86 if ((data + 4) > eod)
87 break;
88
89 flag = AV_RB32 (data);
90 data += 4;
91 mask = 0x80000000;
92 }
93
94 if (!(chunk_id & 0x01) || (flag & mask)) {
95 if ((data + n) > eod)
96 break;
97
98 if (n == 6) {
99 codebook[i].y0 = *data++;
100 codebook[i].y1 = *data++;
101 codebook[i].y2 = *data++;
102 codebook[i].y3 = *data++;
103 codebook[i].u = 128 + *data++;
104 codebook[i].v = 128 + *data++;
105 } else {
106 /* this codebook type indicates either greyscale or
107 * palettized video; if palettized, U & V components will
108 * not be used so it is safe to set them to 128 for the
109 * benefit of greyscale rendering in YUV420P */
110 codebook[i].y0 = *data++;
111 codebook[i].y1 = *data++;
112 codebook[i].y2 = *data++;
113 codebook[i].y3 = *data++;
114 codebook[i].u = 128;
115 codebook[i].v = 128;
116 }
117 }
118 }
119 }
120
121 static int cinepak_decode_vectors (CinepakContext *s, cvid_strip *strip,
122 int chunk_id, int size, const uint8_t *data)
123 {
124 const uint8_t *eod = (data + size);
125 uint32_t flag, mask;
126 cvid_codebook *codebook;
127 unsigned int x, y;
128 uint32_t iy[4];
129 uint32_t iu[2];
130 uint32_t iv[2];
131
132 flag = 0;
133 mask = 0;
134
135 for (y=strip->y1; y < strip->y2; y+=4) {
136
137 iy[0] = strip->x1 + (y * s->frame.linesize[0]);
138 iy[1] = iy[0] + s->frame.linesize[0];
139 iy[2] = iy[1] + s->frame.linesize[0];
140 iy[3] = iy[2] + s->frame.linesize[0];
141 iu[0] = (strip->x1/2) + ((y/2) * s->frame.linesize[1]);
142 iu[1] = iu[0] + s->frame.linesize[1];
143 iv[0] = (strip->x1/2) + ((y/2) * s->frame.linesize[2]);
144 iv[1] = iv[0] + s->frame.linesize[2];
145
146 for (x=strip->x1; x < strip->x2; x+=4) {
147 if ((chunk_id & 0x01) && !(mask >>= 1)) {
148 if ((data + 4) > eod)
149 return -1;
150
151 flag = AV_RB32 (data);
152 data += 4;
153 mask = 0x80000000;
154 }
155
156 if (!(chunk_id & 0x01) || (flag & mask)) {
157 if (!(chunk_id & 0x02) && !(mask >>= 1)) {
158 if ((data + 4) > eod)
159 return -1;
160
161 flag = AV_RB32 (data);
162 data += 4;
163 mask = 0x80000000;
164 }
165
166 if ((chunk_id & 0x02) || (~flag & mask)) {
167 if (data >= eod)
168 return -1;
169
170 codebook = &strip->v1_codebook[*data++];
171 s->frame.data[0][iy[0] + 0] = codebook->y0;
172 s->frame.data[0][iy[0] + 1] = codebook->y0;
173 s->frame.data[0][iy[1] + 0] = codebook->y0;
174 s->frame.data[0][iy[1] + 1] = codebook->y0;
175 if (!s->palette_video) {
176 s->frame.data[1][iu[0]] = codebook->u;
177 s->frame.data[2][iv[0]] = codebook->v;
178 }
179
180 s->frame.data[0][iy[0] + 2] = codebook->y1;
181 s->frame.data[0][iy[0] + 3] = codebook->y1;
182 s->frame.data[0][iy[1] + 2] = codebook->y1;
183 s->frame.data[0][iy[1] + 3] = codebook->y1;
184 if (!s->palette_video) {
185 s->frame.data[1][iu[0] + 1] = codebook->u;
186 s->frame.data[2][iv[0] + 1] = codebook->v;
187 }
188
189 s->frame.data[0][iy[2] + 0] = codebook->y2;
190 s->frame.data[0][iy[2] + 1] = codebook->y2;
191 s->frame.data[0][iy[3] + 0] = codebook->y2;
192 s->frame.data[0][iy[3] + 1] = codebook->y2;
193 if (!s->palette_video) {
194 s->frame.data[1][iu[1]] = codebook->u;
195 s->frame.data[2][iv[1]] = codebook->v;
196 }
197
198 s->frame.data[0][iy[2] + 2] = codebook->y3;
199 s->frame.data[0][iy[2] + 3] = codebook->y3;
200 s->frame.data[0][iy[3] + 2] = codebook->y3;
201 s->frame.data[0][iy[3] + 3] = codebook->y3;
202 if (!s->palette_video) {
203 s->frame.data[1][iu[1] + 1] = codebook->u;
204 s->frame.data[2][iv[1] + 1] = codebook->v;
205 }
206
207 } else if (flag & mask) {
208 if ((data + 4) > eod)
209 return -1;
210
211 codebook = &strip->v4_codebook[*data++];
212 s->frame.data[0][iy[0] + 0] = codebook->y0;
213 s->frame.data[0][iy[0] + 1] = codebook->y1;
214 s->frame.data[0][iy[1] + 0] = codebook->y2;
215 s->frame.data[0][iy[1] + 1] = codebook->y3;
216 if (!s->palette_video) {
217 s->frame.data[1][iu[0]] = codebook->u;
218 s->frame.data[2][iv[0]] = codebook->v;
219 }
220
221 codebook = &strip->v4_codebook[*data++];
222 s->frame.data[0][iy[0] + 2] = codebook->y0;
223 s->frame.data[0][iy[0] + 3] = codebook->y1;
224 s->frame.data[0][iy[1] + 2] = codebook->y2;
225 s->frame.data[0][iy[1] + 3] = codebook->y3;
226 if (!s->palette_video) {
227 s->frame.data[1][iu[0] + 1] = codebook->u;
228 s->frame.data[2][iv[0] + 1] = codebook->v;
229 }
230
231 codebook = &strip->v4_codebook[*data++];
232 s->frame.data[0][iy[2] + 0] = codebook->y0;
233 s->frame.data[0][iy[2] + 1] = codebook->y1;
234 s->frame.data[0][iy[3] + 0] = codebook->y2;
235 s->frame.data[0][iy[3] + 1] = codebook->y3;
236 if (!s->palette_video) {
237 s->frame.data[1][iu[1]] = codebook->u;
238 s->frame.data[2][iv[1]] = codebook->v;
239 }
240
241 codebook = &strip->v4_codebook[*data++];
242 s->frame.data[0][iy[2] + 2] = codebook->y0;
243 s->frame.data[0][iy[2] + 3] = codebook->y1;
244 s->frame.data[0][iy[3] + 2] = codebook->y2;
245 s->frame.data[0][iy[3] + 3] = codebook->y3;
246 if (!s->palette_video) {
247 s->frame.data[1][iu[1] + 1] = codebook->u;
248 s->frame.data[2][iv[1] + 1] = codebook->v;
249 }
250
251 }
252 }
253
254 iy[0] += 4; iy[1] += 4;
255 iy[2] += 4; iy[3] += 4;
256 iu[0] += 2; iu[1] += 2;
257 iv[0] += 2; iv[1] += 2;
258 }
259 }
260
261 return 0;
262 }
263
264 static int cinepak_decode_strip (CinepakContext *s,
265 cvid_strip *strip, const uint8_t *data, int size)
266 {
267 const uint8_t *eod = (data + size);
268 int chunk_id, chunk_size;
269
270 /* coordinate sanity checks */
271 if (strip->x1 >= s->width || strip->x2 > s->width ||
272 strip->y1 >= s->height || strip->y2 > s->height ||
273 strip->x1 >= strip->x2 || strip->y1 >= strip->y2)
274 return -1;
275
276 while ((data + 4) <= eod) {
277 chunk_id = data[0];
278 chunk_size = AV_RB24 (&data[1]) - 4;
279 if(chunk_size < 0)
280 return -1;
281
282 data += 4;
283 chunk_size = ((data + chunk_size) > eod) ? (eod - data) : chunk_size;
284
285 switch (chunk_id) {
286
287 case 0x20:
288 case 0x21:
289 case 0x24:
290 case 0x25:
291 cinepak_decode_codebook (strip->v4_codebook, chunk_id,
292 chunk_size, data);
293 break;
294
295 case 0x22:
296 case 0x23:
297 case 0x26:
298 case 0x27:
299 cinepak_decode_codebook (strip->v1_codebook, chunk_id,
300 chunk_size, data);
301 break;
302
303 case 0x30:
304 case 0x31:
305 case 0x32:
306 return cinepak_decode_vectors (s, strip, chunk_id,
307 chunk_size, data);
308 }
309
310 data += chunk_size;
311 }
312
313 return -1;
314 }
315
316 static int cinepak_decode (CinepakContext *s)
317 {
318 const uint8_t *eod = (s->data + s->size);
319 int i, result, strip_size, frame_flags, num_strips;
320 int y0 = 0;
321 int encoded_buf_size;
322
323 if (s->size < 10)
324 return -1;
325
326 frame_flags = s->data[0];
327 num_strips = AV_RB16 (&s->data[8]);
328 encoded_buf_size = ((s->data[1] << 16) | AV_RB16 (&s->data[2]));
329
330 /* if this is the first frame, check for deviant Sega FILM data */
331 if (s->sega_film_skip_bytes == -1) {
332 if (encoded_buf_size != s->size) {
333 /* If the encoded frame size differs from the frame size as indicated
334 * by the container file, this data likely comes from a Sega FILM/CPK file.
335 * If the frame header is followed by the bytes FE 00 00 06 00 00 then
336 * this is probably one of the two known files that have 6 extra bytes
337 * after the frame header. Else, assume 2 extra bytes. */
338 if ((s->data[10] == 0xFE) &&
339 (s->data[11] == 0x00) &&
340 (s->data[12] == 0x00) &&
341 (s->data[13] == 0x06) &&
342 (s->data[14] == 0x00) &&
343 (s->data[15] == 0x00))
344 s->sega_film_skip_bytes = 6;
345 else
346 s->sega_film_skip_bytes = 2;
347 } else
348 s->sega_film_skip_bytes = 0;
349 }
350
351 s->data += 10 + s->sega_film_skip_bytes;
352
353 if (num_strips > MAX_STRIPS)
354 num_strips = MAX_STRIPS;
355
356 for (i=0; i < num_strips; i++) {
357 if ((s->data + 12) > eod)
358 return -1;
359
360 s->strips[i].id = s->data[0];
361 s->strips[i].y1 = y0;
362 s->strips[i].x1 = 0;
363 s->strips[i].y2 = y0 + AV_RB16 (&s->data[8]);
364 s->strips[i].x2 = s->avctx->width;
365
366 strip_size = AV_RB24 (&s->data[1]) - 12;
367 s->data += 12;
368 strip_size = ((s->data + strip_size) > eod) ? (eod - s->data) : strip_size;
369
370 if ((i > 0) && !(frame_flags & 0x01)) {
371 memcpy (s->strips[i].v4_codebook, s->strips[i-1].v4_codebook,
372 sizeof(s->strips[i].v4_codebook));
373 memcpy (s->strips[i].v1_codebook, s->strips[i-1].v1_codebook,
374 sizeof(s->strips[i].v1_codebook));
375 }
376
377 result = cinepak_decode_strip (s, &s->strips[i], s->data, strip_size);
378
379 if (result != 0)
380 return result;
381
382 s->data += strip_size;
383 y0 = s->strips[i].y2;
384 }
385 return 0;
386 }
387
388 static av_cold int cinepak_decode_init(AVCodecContext *avctx)
389 {
390 CinepakContext *s = avctx->priv_data;
391
392 s->avctx = avctx;
393 s->width = (avctx->width + 3) & ~3;
394 s->height = (avctx->height + 3) & ~3;
395 s->sega_film_skip_bytes = -1; /* uninitialized state */
396
397 // check for paletted data
398 if ((avctx->palctrl == NULL) || (avctx->bits_per_coded_sample == 40)) {
399 s->palette_video = 0;
400 avctx->pix_fmt = PIX_FMT_YUV420P;
401 } else {
402 s->palette_video = 1;
403 avctx->pix_fmt = PIX_FMT_PAL8;
404 }
405
406 s->frame.data[0] = NULL;
407
408 return 0;
409 }
410
411 static int cinepak_decode_frame(AVCodecContext *avctx,
412 void *data, int *data_size,
413 AVPacket *avpkt)
414 {
415 const uint8_t *buf = avpkt->data;
416 int buf_size = avpkt->size;
417 CinepakContext *s = avctx->priv_data;
418
419 s->data = buf;
420 s->size = buf_size;
421
422 s->frame.reference = 1;
423 s->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE |
424 FF_BUFFER_HINTS_REUSABLE;
425 if (avctx->reget_buffer(avctx, &s->frame)) {
426 av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
427 return -1;
428 }
429
430 cinepak_decode(s);
431
432 if (s->palette_video) {
433 memcpy (s->frame.data[1], avctx->palctrl->palette, AVPALETTE_SIZE);
434 if (avctx->palctrl->palette_changed) {
435 s->frame.palette_has_changed = 1;
436 avctx->palctrl->palette_changed = 0;
437 } else
438 s->frame.palette_has_changed = 0;
439 }
440
441 *data_size = sizeof(AVFrame);
442 *(AVFrame*)data = s->frame;
443
444 /* report that the buffer was completely consumed */
445 return buf_size;
446 }
447
448 static av_cold int cinepak_decode_end(AVCodecContext *avctx)
449 {
450 CinepakContext *s = avctx->priv_data;
451
452 if (s->frame.data[0])
453 avctx->release_buffer(avctx, &s->frame);
454
455 return 0;
456 }
457
458 AVCodec cinepak_decoder = {
459 "cinepak",
460 CODEC_TYPE_VIDEO,
461 CODEC_ID_CINEPAK,
462 sizeof(CinepakContext),
463 cinepak_decode_init,
464 NULL,
465 cinepak_decode_end,
466 cinepak_decode_frame,
467 CODEC_CAP_DR1,
468 .long_name = NULL_IF_CONFIG_SMALL("Cinepak"),
469 };
ffmpeg Lagarith lossless decoder