allocate PPS and SPS dynamically
[libav.git] / libavcodec / roqvideo.c
1 /*
2 * Copyright (C) 2003 the ffmpeg project
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 *
20 */
21
22 /**
23 * @file roqvideo.c
24 * Id RoQ Video Decoder by Dr. Tim Ferguson
25 * For more information about the Id RoQ format, visit:
26 * http://www.csse.monash.edu.au/~timf/
27 */
28
29 #include <stdio.h>
30 #include <stdlib.h>
31 #include <string.h>
32 #include <unistd.h>
33
34 #include "avcodec.h"
35 #include "bytestream.h"
36 #include "dsputil.h"
37
38 typedef struct {
39 unsigned char y[4];
40 unsigned char u, v;
41 } roq_cell;
42
43 typedef struct {
44 int idx[4];
45 } roq_qcell;
46
47 #define avg2(a,b) av_clip_uint8(((int)(a)+(int)(b)+1)>>1)
48 #define avg4(a,b,c,d) av_clip_uint8(((int)(a)+(int)(b)+(int)(c)+(int)(d)+2)>>2)
49
50 typedef struct RoqContext {
51
52 AVCodecContext *avctx;
53 DSPContext dsp;
54 AVFrame frames[2];
55 AVFrame *last_frame;
56 AVFrame *current_frame;
57 int first_frame;
58 int y_stride;
59 int c_stride;
60
61 roq_cell cells[256];
62 roq_qcell qcells[256];
63
64 unsigned char *buf;
65 int size;
66
67 } RoqContext;
68
69 #define RoQ_INFO 0x1001
70 #define RoQ_QUAD_CODEBOOK 0x1002
71 #define RoQ_QUAD_VQ 0x1011
72 #define RoQ_SOUND_MONO 0x1020
73 #define RoQ_SOUND_STEREO 0x1021
74
75 #define RoQ_ID_MOT 0x00
76 #define RoQ_ID_FCC 0x01
77 #define RoQ_ID_SLD 0x02
78 #define RoQ_ID_CCC 0x03
79
80 #define get_byte(in_buffer) *(in_buffer++)
81
82
83 void ff_apply_vector_2x2(RoqContext *ri, int x, int y, roq_cell *cell)
84 {
85 unsigned char *yptr;
86
87 yptr = ri->current_frame->data[0] + (y * ri->y_stride) + x;
88 *yptr++ = cell->y[0];
89 *yptr++ = cell->y[1];
90 yptr += (ri->y_stride - 2);
91 *yptr++ = cell->y[2];
92 *yptr++ = cell->y[3];
93 ri->current_frame->data[1][(y/2) * (ri->c_stride) + x/2] = cell->u;
94 ri->current_frame->data[2][(y/2) * (ri->c_stride) + x/2] = cell->v;
95 }
96
97 void ff_apply_vector_4x4(RoqContext *ri, int x, int y, roq_cell *cell)
98 {
99 unsigned long row_inc, c_row_inc;
100 register unsigned char y0, y1, u, v;
101 unsigned char *yptr, *uptr, *vptr;
102
103 yptr = ri->current_frame->data[0] + (y * ri->y_stride) + x;
104 uptr = ri->current_frame->data[1] + (y/2) * (ri->c_stride) + x/2;
105 vptr = ri->current_frame->data[2] + (y/2) * (ri->c_stride) + x/2;
106
107 row_inc = ri->y_stride - 4;
108 c_row_inc = (ri->c_stride) - 2;
109 *yptr++ = y0 = cell->y[0]; *uptr++ = u = cell->u; *vptr++ = v = cell->v;
110 *yptr++ = y0;
111 *yptr++ = y1 = cell->y[1]; *uptr++ = u; *vptr++ = v;
112 *yptr++ = y1;
113
114 yptr += row_inc;
115
116 *yptr++ = y0;
117 *yptr++ = y0;
118 *yptr++ = y1;
119 *yptr++ = y1;
120
121 yptr += row_inc; uptr += c_row_inc; vptr += c_row_inc;
122
123 *yptr++ = y0 = cell->y[2]; *uptr++ = u; *vptr++ = v;
124 *yptr++ = y0;
125 *yptr++ = y1 = cell->y[3]; *uptr++ = u; *vptr++ = v;
126 *yptr++ = y1;
127
128 yptr += row_inc;
129
130 *yptr++ = y0;
131 *yptr++ = y0;
132 *yptr++ = y1;
133 *yptr++ = y1;
134 }
135
136 void ff_apply_motion_4x4(RoqContext *ri, int x, int y,
137 int deltax, int deltay)
138 {
139 int i, hw, mx, my;
140 unsigned char *pa, *pb;
141
142 mx = x + deltax;
143 my = y + deltay;
144
145 /* check MV against frame boundaries */
146 if ((mx < 0) || (mx > ri->avctx->width - 4) ||
147 (my < 0) || (my > ri->avctx->height - 4)) {
148 av_log(ri->avctx, AV_LOG_ERROR, "motion vector out of bounds: MV = (%d, %d), boundaries = (0, 0, %d, %d)\n",
149 mx, my, ri->avctx->width, ri->avctx->height);
150 return;
151 }
152
153 pa = ri->current_frame->data[0] + (y * ri->y_stride) + x;
154 pb = ri->last_frame->data[0] + (my * ri->y_stride) + mx;
155 for(i = 0; i < 4; i++) {
156 pa[0] = pb[0];
157 pa[1] = pb[1];
158 pa[2] = pb[2];
159 pa[3] = pb[3];
160 pa += ri->y_stride;
161 pb += ri->y_stride;
162 }
163
164 hw = ri->y_stride/2;
165 pa = ri->current_frame->data[1] + (y * ri->y_stride)/4 + x/2;
166 pb = ri->last_frame->data[1] + (my/2) * (ri->y_stride/2) + (mx + 1)/2;
167
168 for(i = 0; i < 2; i++) {
169 switch(((my & 0x01) << 1) | (mx & 0x01)) {
170
171 case 0:
172 pa[0] = pb[0];
173 pa[1] = pb[1];
174 pa[hw] = pb[hw];
175 pa[hw+1] = pb[hw+1];
176 break;
177
178 case 1:
179 pa[0] = avg2(pb[0], pb[1]);
180 pa[1] = avg2(pb[1], pb[2]);
181 pa[hw] = avg2(pb[hw], pb[hw+1]);
182 pa[hw+1] = avg2(pb[hw+1], pb[hw+2]);
183 break;
184
185 case 2:
186 pa[0] = avg2(pb[0], pb[hw]);
187 pa[1] = avg2(pb[1], pb[hw+1]);
188 pa[hw] = avg2(pb[hw], pb[hw*2]);
189 pa[hw+1] = avg2(pb[hw+1], pb[(hw*2)+1]);
190 break;
191
192 case 3:
193 pa[0] = avg4(pb[0], pb[1], pb[hw], pb[hw+1]);
194 pa[1] = avg4(pb[1], pb[2], pb[hw+1], pb[hw+2]);
195 pa[hw] = avg4(pb[hw], pb[hw+1], pb[hw*2], pb[(hw*2)+1]);
196 pa[hw+1] = avg4(pb[hw+1], pb[hw+2], pb[(hw*2)+1], pb[(hw*2)+1]);
197 break;
198 }
199
200 pa = ri->current_frame->data[2] + (y * ri->y_stride)/4 + x/2;
201 pb = ri->last_frame->data[2] + (my/2) * (ri->y_stride/2) + (mx + 1)/2;
202 }
203 }
204
205 void ff_apply_motion_8x8(RoqContext *ri, int x, int y,
206 int deltax, int deltay)
207 {
208 int mx, my, i, j, hw;
209 unsigned char *pa, *pb;
210
211 mx = x + deltax;
212 my = y + deltay;
213
214 /* check MV against frame boundaries */
215 if ((mx < 0) || (mx > ri->avctx->width - 8) ||
216 (my < 0) || (my > ri->avctx->height - 8)) {
217 av_log(ri->avctx, AV_LOG_ERROR, "motion vector out of bounds: MV = (%d, %d), boundaries = (0, 0, %d, %d)\n",
218 mx, my, ri->avctx->width, ri->avctx->height);
219 return;
220 }
221
222 pa = ri->current_frame->data[0] + (y * ri->y_stride) + x;
223 pb = ri->last_frame->data[0] + (my * ri->y_stride) + mx;
224 for(i = 0; i < 8; i++) {
225 pa[0] = pb[0];
226 pa[1] = pb[1];
227 pa[2] = pb[2];
228 pa[3] = pb[3];
229 pa[4] = pb[4];
230 pa[5] = pb[5];
231 pa[6] = pb[6];
232 pa[7] = pb[7];
233 pa += ri->y_stride;
234 pb += ri->y_stride;
235 }
236
237 hw = ri->c_stride;
238 pa = ri->current_frame->data[1] + (y * ri->y_stride)/4 + x/2;
239 pb = ri->last_frame->data[1] + (my/2) * (ri->y_stride/2) + (mx + 1)/2;
240 for(j = 0; j < 2; j++) {
241 for(i = 0; i < 4; i++) {
242 switch(((my & 0x01) << 1) | (mx & 0x01)) {
243
244 case 0:
245 pa[0] = pb[0];
246 pa[1] = pb[1];
247 pa[2] = pb[2];
248 pa[3] = pb[3];
249 break;
250
251 case 1:
252 pa[0] = avg2(pb[0], pb[1]);
253 pa[1] = avg2(pb[1], pb[2]);
254 pa[2] = avg2(pb[2], pb[3]);
255 pa[3] = avg2(pb[3], pb[4]);
256 break;
257
258 case 2:
259 pa[0] = avg2(pb[0], pb[hw]);
260 pa[1] = avg2(pb[1], pb[hw+1]);
261 pa[2] = avg2(pb[2], pb[hw+2]);
262 pa[3] = avg2(pb[3], pb[hw+3]);
263 break;
264
265 case 3:
266 pa[0] = avg4(pb[0], pb[1], pb[hw], pb[hw+1]);
267 pa[1] = avg4(pb[1], pb[2], pb[hw+1], pb[hw+2]);
268 pa[2] = avg4(pb[2], pb[3], pb[hw+2], pb[hw+3]);
269 pa[3] = avg4(pb[3], pb[4], pb[hw+3], pb[hw+4]);
270 break;
271 }
272 pa += ri->c_stride;
273 pb += ri->c_stride;
274 }
275
276 pa = ri->current_frame->data[2] + (y * ri->y_stride)/4 + x/2;
277 pb = ri->last_frame->data[2] + (my/2) * (ri->y_stride/2) + (mx + 1)/2;
278 }
279 }
280
281 static void roqvideo_decode_frame(RoqContext *ri)
282 {
283 unsigned int chunk_id = 0, chunk_arg = 0;
284 unsigned long chunk_size = 0;
285 int i, j, k, nv1, nv2, vqflg = 0, vqflg_pos = -1;
286 int vqid, bpos, xpos, ypos, xp, yp, x, y, mx, my;
287 int frame_stats[2][4] = {{0},{0}};
288 roq_qcell *qcell;
289 unsigned char *buf = ri->buf;
290 unsigned char *buf_end = ri->buf + ri->size;
291
292 while (buf < buf_end) {
293 chunk_id = bytestream_get_le16(&buf);
294 chunk_size = bytestream_get_le32(&buf);
295 chunk_arg = bytestream_get_le16(&buf);
296
297 if(chunk_id == RoQ_QUAD_VQ)
298 break;
299 if(chunk_id == RoQ_QUAD_CODEBOOK) {
300 if((nv1 = chunk_arg >> 8) == 0)
301 nv1 = 256;
302 if((nv2 = chunk_arg & 0xff) == 0 && nv1 * 6 < chunk_size)
303 nv2 = 256;
304 for(i = 0; i < nv1; i++) {
305 ri->cells[i].y[0] = get_byte(buf);
306 ri->cells[i].y[1] = get_byte(buf);
307 ri->cells[i].y[2] = get_byte(buf);
308 ri->cells[i].y[3] = get_byte(buf);
309 ri->cells[i].u = get_byte(buf);
310 ri->cells[i].v = get_byte(buf);
311 }
312 for(i = 0; i < nv2; i++)
313 for(j = 0; j < 4; j++)
314 ri->qcells[i].idx[j] = get_byte(buf);
315 }
316 }
317
318 bpos = xpos = ypos = 0;
319 while(bpos < chunk_size) {
320 for (yp = ypos; yp < ypos + 16; yp += 8)
321 for (xp = xpos; xp < xpos + 16; xp += 8) {
322 if (vqflg_pos < 0) {
323 vqflg = buf[bpos++]; vqflg |= (buf[bpos++] << 8);
324 vqflg_pos = 7;
325 }
326 vqid = (vqflg >> (vqflg_pos * 2)) & 0x3;
327 frame_stats[0][vqid]++;
328 vqflg_pos--;
329
330 switch(vqid) {
331 case RoQ_ID_MOT:
332 ff_apply_motion_8x8(ri, xp, yp, 0, 0);
333 break;
334 case RoQ_ID_FCC:
335 mx = 8 - (buf[bpos] >> 4) - ((signed char) (chunk_arg >> 8));
336 my = 8 - (buf[bpos++] & 0xf) - ((signed char) chunk_arg);
337 ff_apply_motion_8x8(ri, xp, yp, mx, my);
338 break;
339 case RoQ_ID_SLD:
340 qcell = ri->qcells + buf[bpos++];
341 ff_apply_vector_4x4(ri, xp, yp, ri->cells + qcell->idx[0]);
342 ff_apply_vector_4x4(ri, xp+4, yp, ri->cells + qcell->idx[1]);
343 ff_apply_vector_4x4(ri, xp, yp+4, ri->cells + qcell->idx[2]);
344 ff_apply_vector_4x4(ri, xp+4, yp+4, ri->cells + qcell->idx[3]);
345 break;
346 case RoQ_ID_CCC:
347 for (k = 0; k < 4; k++) {
348 x = xp; y = yp;
349 if(k & 0x01) x += 4;
350 if(k & 0x02) y += 4;
351
352 if (vqflg_pos < 0) {
353 vqflg = buf[bpos++];
354 vqflg |= (buf[bpos++] << 8);
355 vqflg_pos = 7;
356 }
357 vqid = (vqflg >> (vqflg_pos * 2)) & 0x3;
358 frame_stats[1][vqid]++;
359 vqflg_pos--;
360 switch(vqid) {
361 case RoQ_ID_MOT:
362 ff_apply_motion_4x4(ri, x, y, 0, 0);
363 break;
364 case RoQ_ID_FCC:
365 mx = 8 - (buf[bpos] >> 4) - ((signed char) (chunk_arg >> 8));
366 my = 8 - (buf[bpos++] & 0xf) - ((signed char) chunk_arg);
367 ff_apply_motion_4x4(ri, x, y, mx, my);
368 break;
369 case RoQ_ID_SLD:
370 qcell = ri->qcells + buf[bpos++];
371 ff_apply_vector_2x2(ri, x, y, ri->cells + qcell->idx[0]);
372 ff_apply_vector_2x2(ri, x+2, y, ri->cells + qcell->idx[1]);
373 ff_apply_vector_2x2(ri, x, y+2, ri->cells + qcell->idx[2]);
374 ff_apply_vector_2x2(ri, x+2, y+2, ri->cells + qcell->idx[3]);
375 break;
376 case RoQ_ID_CCC:
377 ff_apply_vector_2x2(ri, x, y, ri->cells + buf[bpos]);
378 ff_apply_vector_2x2(ri, x+2, y, ri->cells + buf[bpos+1]);
379 ff_apply_vector_2x2(ri, x, y+2, ri->cells + buf[bpos+2]);
380 ff_apply_vector_2x2(ri, x+2, y+2, ri->cells + buf[bpos+3]);
381 bpos += 4;
382 break;
383 }
384 }
385 break;
386 default:
387 av_log(ri->avctx, AV_LOG_ERROR, "Unknown vq code: %d\n", vqid);
388 }
389 }
390
391 xpos += 16;
392 if (xpos >= ri->avctx->width) {
393 xpos -= ri->avctx->width;
394 ypos += 16;
395 }
396 if(ypos >= ri->avctx->height)
397 break;
398 }
399 }
400
401
402 static int roq_decode_init(AVCodecContext *avctx)
403 {
404 RoqContext *s = avctx->priv_data;
405
406 s->avctx = avctx;
407 s->first_frame = 1;
408 s->last_frame = &s->frames[0];
409 s->current_frame = &s->frames[1];
410 avctx->pix_fmt = PIX_FMT_YUV420P;
411 dsputil_init(&s->dsp, avctx);
412
413 return 0;
414 }
415
416 static int roq_decode_frame(AVCodecContext *avctx,
417 void *data, int *data_size,
418 uint8_t *buf, int buf_size)
419 {
420 RoqContext *s = avctx->priv_data;
421
422 if (avctx->get_buffer(avctx, s->current_frame)) {
423 av_log(avctx, AV_LOG_ERROR, " RoQ: get_buffer() failed\n");
424 return -1;
425 }
426 s->y_stride = s->current_frame->linesize[0];
427 s->c_stride = s->current_frame->linesize[1];
428
429 s->buf = buf;
430 s->size = buf_size;
431 roqvideo_decode_frame(s);
432
433 /* release the last frame if it is allocated */
434 if (s->first_frame)
435 s->first_frame = 0;
436 else
437 avctx->release_buffer(avctx, s->last_frame);
438
439 *data_size = sizeof(AVFrame);
440 *(AVFrame*)data = *s->current_frame;
441
442 /* shuffle frames */
443 FFSWAP(AVFrame *, s->current_frame, s->last_frame);
444
445 return buf_size;
446 }
447
448 static int roq_decode_end(AVCodecContext *avctx)
449 {
450 RoqContext *s = avctx->priv_data;
451
452 /* release the last frame */
453 if (s->last_frame->data[0])
454 avctx->release_buffer(avctx, s->last_frame);
455
456 return 0;
457 }
458
459 AVCodec roq_decoder = {
460 "roqvideo",
461 CODEC_TYPE_VIDEO,
462 CODEC_ID_ROQ,
463 sizeof(RoqContext),
464 roq_decode_init,
465 NULL,
466 roq_decode_end,
467 roq_decode_frame,
468 CODEC_CAP_DR1,
469 };