2 * Copyright (C) 2003 the ffmpeg project
4 * This file is part of FFmpeg.
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.
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.
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
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/
39 unsigned char y0, y1, y2, y3, u, v;
46 static int uiclip[1024], *uiclp; /* clipping table */
47 #define avg2(a,b) uiclp[(((int)(a)+(int)(b)+1)>>1)]
48 #define avg4(a,b,c,d) uiclp[(((int)(a)+(int)(b)+(int)(c)+(int)(d)+2)>>2)]
50 typedef struct RoqContext {
52 AVCodecContext *avctx;
56 AVFrame *current_frame;
62 roq_qcell qcells[256];
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
75 #define RoQ_ID_MOT 0x00
76 #define RoQ_ID_FCC 0x01
77 #define RoQ_ID_SLD 0x02
78 #define RoQ_ID_CCC 0x03
80 #define get_byte(in_buffer) *(in_buffer++)
81 #define get_word(in_buffer) ((unsigned short)(in_buffer += 2, \
82 (in_buffer[-1] << 8 | in_buffer[-2])))
83 #define get_long(in_buffer) ((unsigned long)(in_buffer += 4, \
84 (in_buffer[-1] << 24 | in_buffer[-2] << 16 | in_buffer[-3] << 8 | in_buffer[-4])))
87 static void apply_vector_2x2(RoqContext *ri, int x, int y, roq_cell *cell)
91 yptr = ri->current_frame->data[0] + (y * ri->y_stride) + x;
94 yptr += (ri->y_stride - 2);
97 ri->current_frame->data[1][(y/2) * (ri->c_stride) + x/2] = cell->u;
98 ri->current_frame->data[2][(y/2) * (ri->c_stride) + x/2] = cell->v;
101 static void apply_vector_4x4(RoqContext *ri, int x, int y, roq_cell *cell)
103 unsigned long row_inc, c_row_inc;
104 register unsigned char y0, y1, u, v;
105 unsigned char *yptr, *uptr, *vptr;
107 yptr = ri->current_frame->data[0] + (y * ri->y_stride) + x;
108 uptr = ri->current_frame->data[1] + (y/2) * (ri->c_stride) + x/2;
109 vptr = ri->current_frame->data[2] + (y/2) * (ri->c_stride) + x/2;
111 row_inc = ri->y_stride - 4;
112 c_row_inc = (ri->c_stride) - 2;
113 *yptr++ = y0 = cell->y0; *uptr++ = u = cell->u; *vptr++ = v = cell->v;
115 *yptr++ = y1 = cell->y1; *uptr++ = u; *vptr++ = v;
125 yptr += row_inc; uptr += c_row_inc; vptr += c_row_inc;
127 *yptr++ = y0 = cell->y2; *uptr++ = u; *vptr++ = v;
129 *yptr++ = y1 = cell->y3; *uptr++ = u; *vptr++ = v;
140 static void apply_motion_4x4(RoqContext *ri, int x, int y, unsigned char mv,
141 signed char mean_x, signed char mean_y)
144 unsigned char *pa, *pb;
146 mx = x + 8 - (mv >> 4) - mean_x;
147 my = y + 8 - (mv & 0xf) - mean_y;
149 /* check MV against frame boundaries */
150 if ((mx < 0) || (mx > ri->avctx->width - 4) ||
151 (my < 0) || (my > ri->avctx->height - 4)) {
152 av_log(ri->avctx, AV_LOG_ERROR, "motion vector out of bounds: MV = (%d, %d), boundaries = (0, 0, %d, %d)\n",
153 mx, my, ri->avctx->width, ri->avctx->height);
157 pa = ri->current_frame->data[0] + (y * ri->y_stride) + x;
158 pb = ri->last_frame->data[0] + (my * ri->y_stride) + mx;
159 for(i = 0; i < 4; i++) {
169 pa = ri->current_frame->data[1] + (y * ri->y_stride)/4 + x/2;
170 pb = ri->last_frame->data[1] + (my/2) * (ri->y_stride/2) + (mx + 1)/2;
172 for(i = 0; i < 2; i++) {
173 switch(((my & 0x01) << 1) | (mx & 0x01)) {
183 pa[0] = avg2(pb[0], pb[1]);
184 pa[1] = avg2(pb[1], pb[2]);
185 pa[hw] = avg2(pb[hw], pb[hw+1]);
186 pa[hw+1] = avg2(pb[hw+1], pb[hw+2]);
190 pa[0] = avg2(pb[0], pb[hw]);
191 pa[1] = avg2(pb[1], pb[hw+1]);
192 pa[hw] = avg2(pb[hw], pb[hw*2]);
193 pa[hw+1] = avg2(pb[hw+1], pb[(hw*2)+1]);
197 pa[0] = avg4(pb[0], pb[1], pb[hw], pb[hw+1]);
198 pa[1] = avg4(pb[1], pb[2], pb[hw+1], pb[hw+2]);
199 pa[hw] = avg4(pb[hw], pb[hw+1], pb[hw*2], pb[(hw*2)+1]);
200 pa[hw+1] = avg4(pb[hw+1], pb[hw+2], pb[(hw*2)+1], pb[(hw*2)+1]);
204 pa = ri->current_frame->data[2] + (y * ri->y_stride)/4 + x/2;
205 pb = ri->last_frame->data[2] + (my/2) * (ri->y_stride/2) + (mx + 1)/2;
209 static void apply_motion_8x8(RoqContext *ri, int x, int y,
210 unsigned char mv, signed char mean_x, signed char mean_y)
212 int mx, my, i, j, hw;
213 unsigned char *pa, *pb;
215 mx = x + 8 - (mv >> 4) - mean_x;
216 my = y + 8 - (mv & 0xf) - mean_y;
218 /* check MV against frame boundaries */
219 if ((mx < 0) || (mx > ri->avctx->width - 8) ||
220 (my < 0) || (my > ri->avctx->height - 8)) {
221 av_log(ri->avctx, AV_LOG_ERROR, "motion vector out of bounds: MV = (%d, %d), boundaries = (0, 0, %d, %d)\n",
222 mx, my, ri->avctx->width, ri->avctx->height);
226 pa = ri->current_frame->data[0] + (y * ri->y_stride) + x;
227 pb = ri->last_frame->data[0] + (my * ri->y_stride) + mx;
228 for(i = 0; i < 8; i++) {
242 pa = ri->current_frame->data[1] + (y * ri->y_stride)/4 + x/2;
243 pb = ri->last_frame->data[1] + (my/2) * (ri->y_stride/2) + (mx + 1)/2;
244 for(j = 0; j < 2; j++) {
245 for(i = 0; i < 4; i++) {
246 switch(((my & 0x01) << 1) | (mx & 0x01)) {
256 pa[0] = avg2(pb[0], pb[1]);
257 pa[1] = avg2(pb[1], pb[2]);
258 pa[2] = avg2(pb[2], pb[3]);
259 pa[3] = avg2(pb[3], pb[4]);
263 pa[0] = avg2(pb[0], pb[hw]);
264 pa[1] = avg2(pb[1], pb[hw+1]);
265 pa[2] = avg2(pb[2], pb[hw+2]);
266 pa[3] = avg2(pb[3], pb[hw+3]);
270 pa[0] = avg4(pb[0], pb[1], pb[hw], pb[hw+1]);
271 pa[1] = avg4(pb[1], pb[2], pb[hw+1], pb[hw+2]);
272 pa[2] = avg4(pb[2], pb[3], pb[hw+2], pb[hw+3]);
273 pa[3] = avg4(pb[3], pb[4], pb[hw+3], pb[hw+4]);
280 pa = ri->current_frame->data[2] + (y * ri->y_stride)/4 + x/2;
281 pb = ri->last_frame->data[2] + (my/2) * (ri->y_stride/2) + (mx + 1)/2;
285 static void roqvideo_decode_frame(RoqContext *ri)
287 unsigned int chunk_id = 0, chunk_arg = 0;
288 unsigned long chunk_size = 0;
289 int i, j, k, nv1, nv2, vqflg = 0, vqflg_pos = -1;
290 int vqid, bpos, xpos, ypos, xp, yp, x, y;
291 int frame_stats[2][4] = {{0},{0}};
293 unsigned char *buf = ri->buf;
294 unsigned char *buf_end = ri->buf + ri->size;
296 while (buf < buf_end) {
297 chunk_id = get_word(buf);
298 chunk_size = get_long(buf);
299 chunk_arg = get_word(buf);
301 if(chunk_id == RoQ_QUAD_VQ)
303 if(chunk_id == RoQ_QUAD_CODEBOOK) {
304 if((nv1 = chunk_arg >> 8) == 0)
306 if((nv2 = chunk_arg & 0xff) == 0 && nv1 * 6 < chunk_size)
308 for(i = 0; i < nv1; i++) {
309 ri->cells[i].y0 = get_byte(buf);
310 ri->cells[i].y1 = get_byte(buf);
311 ri->cells[i].y2 = get_byte(buf);
312 ri->cells[i].y3 = get_byte(buf);
313 ri->cells[i].u = get_byte(buf);
314 ri->cells[i].v = get_byte(buf);
316 for(i = 0; i < nv2; i++)
317 for(j = 0; j < 4; j++)
318 ri->qcells[i].idx[j] = get_byte(buf);
322 bpos = xpos = ypos = 0;
323 while(bpos < chunk_size) {
324 for (yp = ypos; yp < ypos + 16; yp += 8)
325 for (xp = xpos; xp < xpos + 16; xp += 8) {
327 vqflg = buf[bpos++]; vqflg |= (buf[bpos++] << 8);
330 vqid = (vqflg >> (vqflg_pos * 2)) & 0x3;
331 frame_stats[0][vqid]++;
336 apply_motion_8x8(ri, xp, yp, 0, 8, 8);
339 apply_motion_8x8(ri, xp, yp, buf[bpos++], chunk_arg >> 8,
343 qcell = ri->qcells + buf[bpos++];
344 apply_vector_4x4(ri, xp, yp, ri->cells + qcell->idx[0]);
345 apply_vector_4x4(ri, xp+4, yp, ri->cells + qcell->idx[1]);
346 apply_vector_4x4(ri, xp, yp+4, ri->cells + qcell->idx[2]);
347 apply_vector_4x4(ri, xp+4, yp+4, ri->cells + qcell->idx[3]);
350 for (k = 0; k < 4; k++) {
357 vqflg |= (buf[bpos++] << 8);
360 vqid = (vqflg >> (vqflg_pos * 2)) & 0x3;
361 frame_stats[1][vqid]++;
365 apply_motion_4x4(ri, x, y, 0, 8, 8);
368 apply_motion_4x4(ri, x, y, buf[bpos++],
369 chunk_arg >> 8, chunk_arg & 0xff);
372 qcell = ri->qcells + buf[bpos++];
373 apply_vector_2x2(ri, x, y, ri->cells + qcell->idx[0]);
374 apply_vector_2x2(ri, x+2, y, ri->cells + qcell->idx[1]);
375 apply_vector_2x2(ri, x, y+2, ri->cells + qcell->idx[2]);
376 apply_vector_2x2(ri, x+2, y+2, ri->cells + qcell->idx[3]);
379 apply_vector_2x2(ri, x, y, ri->cells + buf[bpos]);
380 apply_vector_2x2(ri, x+2, y, ri->cells + buf[bpos+1]);
381 apply_vector_2x2(ri, x, y+2, ri->cells + buf[bpos+2]);
382 apply_vector_2x2(ri, x+2, y+2, ri->cells + buf[bpos+3]);
389 av_log(ri->avctx, AV_LOG_ERROR, "Unknown vq code: %d\n", vqid);
394 if (xpos >= ri->avctx->width) {
395 xpos -= ri->avctx->width;
398 if(ypos >= ri->avctx->height)
404 static int roq_decode_init(AVCodecContext *avctx)
406 RoqContext *s = avctx->priv_data;
411 s->last_frame = &s->frames[0];
412 s->current_frame = &s->frames[1];
413 avctx->pix_fmt = PIX_FMT_YUV420P;
414 dsputil_init(&s->dsp, avctx);
417 for(i = -512; i < 512; i++)
418 uiclp[i] = (i < 0 ? 0 : (i > 255 ? 255 : i));
423 static int roq_decode_frame(AVCodecContext *avctx,
424 void *data, int *data_size,
425 uint8_t *buf, int buf_size)
427 RoqContext *s = avctx->priv_data;
429 if (avctx->get_buffer(avctx, s->current_frame)) {
430 av_log(avctx, AV_LOG_ERROR, " RoQ: get_buffer() failed\n");
433 s->y_stride = s->current_frame->linesize[0];
434 s->c_stride = s->current_frame->linesize[1];
438 roqvideo_decode_frame(s);
440 /* release the last frame if it is allocated */
444 avctx->release_buffer(avctx, s->last_frame);
446 *data_size = sizeof(AVFrame);
447 *(AVFrame*)data = *s->current_frame;
450 FFSWAP(AVFrame *, s->current_frame, s->last_frame);
455 static int roq_decode_end(AVCodecContext *avctx)
457 RoqContext *s = avctx->priv_data;
459 /* release the last frame */
460 if (s->last_frame->data[0])
461 avctx->release_buffer(avctx, s->last_frame);
466 AVCodec roq_decoder = {