20 |
* along with this program ; if not, write to the Free Software |
* along with this program ; if not, write to the Free Software |
21 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
22 |
* |
* |
23 |
* $Id: decoder.c,v 1.79 2006-09-10 22:42:15 Isibaar Exp $ |
* $Id: decoder.c,v 1.84 2010-11-12 10:10:40 Isibaar Exp $ |
24 |
* |
* |
25 |
****************************************************************************/ |
****************************************************************************/ |
26 |
|
|
197 |
dec->time_inc_resolution = 1; /* until VOL header says otherwise */ |
dec->time_inc_resolution = 1; /* until VOL header says otherwise */ |
198 |
dec->ver_id = 1; |
dec->ver_id = 1; |
199 |
|
|
200 |
|
if (create->fourcc == ((int)('X')|((int)('V')<<8)| |
201 |
|
((int)('I')<<16)|((int)('D')<<24))) { /* XVID */ |
202 |
|
dec->bs_version = 0; /* Initially assume oldest xvid version */ |
203 |
|
} |
204 |
|
else { |
205 |
dec->bs_version = 0xffff; /* Initialize to very high value -> assume bugfree stream */ |
dec->bs_version = 0xffff; /* Initialize to very high value -> assume bugfree stream */ |
206 |
|
} |
207 |
|
|
208 |
dec->fixed_dimensions = (dec->width > 0 && dec->height > 0); |
dec->fixed_dimensions = (dec->width > 0 && dec->height > 0); |
209 |
|
|
210 |
if (dec->fixed_dimensions) |
if (dec->fixed_dimensions) { |
211 |
return decoder_resize(dec); |
int ret = decoder_resize(dec); |
212 |
|
if (ret == XVID_ERR_MEMORY) create->handle = NULL; |
213 |
|
return ret; |
214 |
|
} |
215 |
else |
else |
216 |
return 0; |
return 0; |
217 |
} |
} |
757 |
bound = read_video_packet_header(bs, dec, 0, |
bound = read_video_packet_header(bs, dec, 0, |
758 |
&quant, NULL, NULL, &intra_dc_threshold); |
&quant, NULL, NULL, &intra_dc_threshold); |
759 |
x = bound % mb_width; |
x = bound % mb_width; |
760 |
y = bound / mb_width; |
y = MIN((bound / mb_width), (mb_height-1)); |
761 |
} |
} |
762 |
mb = &dec->mbs[y * dec->mb_width + x]; |
mb = &dec->mbs[y * dec->mb_width + x]; |
763 |
|
|
984 |
bound = read_video_packet_header(bs, dec, fcode - 1, |
bound = read_video_packet_header(bs, dec, fcode - 1, |
985 |
&quant, &fcode, NULL, &intra_dc_threshold); |
&quant, &fcode, NULL, &intra_dc_threshold); |
986 |
x = bound % mb_width; |
x = bound % mb_width; |
987 |
y = bound / mb_width; |
y = MIN((bound / mb_width), (mb_height-1)); |
988 |
} |
} |
989 |
mb = &dec->mbs[y * dec->mb_width + x]; |
mb = &dec->mbs[y * dec->mb_width + x]; |
990 |
|
|
1344 |
return -1; |
return -1; |
1345 |
} |
} |
1346 |
|
|
1347 |
|
static int __inline get_resync_len_b(const int fcode_backward, |
1348 |
|
const int fcode_forward) { |
1349 |
|
int resync_len = ((fcode_forward>fcode_backward) ? fcode_forward : fcode_backward) - 1; |
1350 |
|
if (resync_len < 1) resync_len = 1; |
1351 |
|
return resync_len; |
1352 |
|
} |
1353 |
|
|
1354 |
static void |
static void |
1355 |
decoder_bframe(DECODER * dec, |
decoder_bframe(DECODER * dec, |
1356 |
Bitstream * bs, |
Bitstream * bs, |
1362 |
VECTOR mv; |
VECTOR mv; |
1363 |
const VECTOR zeromv = {0,0}; |
const VECTOR zeromv = {0,0}; |
1364 |
int i; |
int i; |
1365 |
|
int resync_len; |
1366 |
|
|
1367 |
if (!dec->is_edged[0]) { |
if (!dec->is_edged[0]) { |
1368 |
start_timer(); |
start_timer(); |
1380 |
stop_edges_timer(); |
stop_edges_timer(); |
1381 |
} |
} |
1382 |
|
|
1383 |
|
resync_len = get_resync_len_b(fcode_backward, fcode_forward); |
1384 |
for (y = 0; y < dec->mb_height; y++) { |
for (y = 0; y < dec->mb_height; y++) { |
1385 |
/* Initialize Pred Motion Vector */ |
/* Initialize Pred Motion Vector */ |
1386 |
dec->p_fmv = dec->p_bmv = zeromv; |
dec->p_fmv = dec->p_bmv = zeromv; |
1387 |
for (x = 0; x < dec->mb_width; x++) { |
for (x = 0; x < dec->mb_width; x++) { |
1388 |
MACROBLOCK *mb = &dec->mbs[y * dec->mb_width + x]; |
MACROBLOCK *mb = &dec->mbs[y * dec->mb_width + x]; |
1389 |
MACROBLOCK *last_mb = &dec->last_mbs[y * dec->mb_width + x]; |
MACROBLOCK *last_mb = &dec->last_mbs[y * dec->mb_width + x]; |
|
const int fcode_max = (fcode_forward>fcode_backward) ? fcode_forward : fcode_backward; |
|
1390 |
int intra_dc_threshold; /* fake variable */ |
int intra_dc_threshold; /* fake variable */ |
1391 |
|
|
1392 |
if (check_resync_marker(bs, fcode_max - 1)) { |
if (check_resync_marker(bs, resync_len)) { |
1393 |
int bound = read_video_packet_header(bs, dec, fcode_max - 1, &quant, |
int bound = read_video_packet_header(bs, dec, resync_len, &quant, |
1394 |
&fcode_forward, &fcode_backward, &intra_dc_threshold); |
&fcode_forward, &fcode_backward, &intra_dc_threshold); |
1395 |
x = bound % dec->mb_width; |
x = bound % dec->mb_width; |
1396 |
y = bound / dec->mb_width; |
y = MIN((bound / dec->mb_width), (dec->mb_height-1)); |
1397 |
/* reset predicted macroblocks */ |
/* reset predicted macroblocks */ |
1398 |
dec->p_fmv = dec->p_bmv = zeromv; |
dec->p_fmv = dec->p_bmv = zeromv; |
1399 |
|
/* update resync len with new fcodes */ |
1400 |
|
resync_len = get_resync_len_b(fcode_backward, fcode_forward); |
1401 |
} |
} |
1402 |
|
|
1403 |
mv = |
mv = |
1660 |
goto repeat; |
goto repeat; |
1661 |
} |
} |
1662 |
|
|
1663 |
dec->p_bmv.x = dec->p_bmv.y = dec->p_fmv.y = dec->p_fmv.y = 0; /* init pred vector to 0 */ |
dec->p_bmv.x = dec->p_bmv.y = dec->p_fmv.x = dec->p_fmv.y = 0; /* init pred vector to 0 */ |
1664 |
|
|
1665 |
/* packed_mode: special-N_VOP treament */ |
/* packed_mode: special-N_VOP treament */ |
1666 |
if (dec->packed_mode && coding_type == N_VOP) { |
if (dec->packed_mode && coding_type == N_VOP) { |