33 |
#include "mbcoding.h" |
#include "mbcoding.h" |
34 |
|
|
35 |
|
|
36 |
static uint32_t __inline |
static const uint8_t log2_tab_16[16] = { 0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4 }; |
37 |
log2bin(uint32_t value) |
|
38 |
|
static uint32_t __inline log2bin(uint32_t value) |
39 |
{ |
{ |
40 |
int n = 0; |
int n = 0; |
41 |
|
if (value & 0xffff0000) { |
42 |
while (value) { |
value >>= 16; |
43 |
value >>= 1; |
n += 16; |
44 |
n++; |
} |
45 |
|
if (value & 0xff00) { |
46 |
|
value >>= 8; |
47 |
|
n += 8; |
48 |
|
} |
49 |
|
if (value & 0xf0) { |
50 |
|
value >>= 4; |
51 |
|
n += 4; |
52 |
} |
} |
53 |
return n; |
return n + log2_tab_16[value]; |
54 |
} |
} |
55 |
|
|
|
|
|
56 |
static const uint32_t intra_dc_threshold_table[] = { |
static const uint32_t intra_dc_threshold_table[] = { |
57 |
32, /* never use */ |
32, /* never use */ |
58 |
13, |
13, |
78 |
matrix[scan_tables[0][i++]] = value; |
matrix[scan_tables[0][i++]] = value; |
79 |
} |
} |
80 |
while (value != 0 && i < 64); |
while (value != 0 && i < 64); |
|
i--; /* fix little bug at coeff not full */ |
|
81 |
|
|
82 |
|
if (value != 0) return; |
83 |
|
|
84 |
|
i--; |
85 |
while (i < 64) { |
while (i < 64) { |
86 |
matrix[scan_tables[0][i++]] = last; |
matrix[scan_tables[0][i++]] = last; |
87 |
} |
} |
194 |
DPRINTF(XVID_DEBUG_HEADER,"fcode_backward %i\n", *fcode_backward); |
DPRINTF(XVID_DEBUG_HEADER,"fcode_backward %i\n", *fcode_backward); |
195 |
} |
} |
196 |
} |
} |
|
|
|
197 |
} |
} |
198 |
|
|
199 |
if (dec->newpred_enable) |
if (dec->newpred_enable) |
387 |
BitstreamReadHeaders(Bitstream * bs, |
BitstreamReadHeaders(Bitstream * bs, |
388 |
DECODER * dec, |
DECODER * dec, |
389 |
uint32_t * rounding, |
uint32_t * rounding, |
|
uint32_t * reduced_resolution, |
|
390 |
uint32_t * quant, |
uint32_t * quant, |
391 |
uint32_t * fcode_forward, |
uint32_t * fcode_forward, |
392 |
uint32_t * fcode_backward, |
uint32_t * fcode_backward, |
400 |
int32_t time_increment = 0; |
int32_t time_increment = 0; |
401 |
int resize = 0; |
int resize = 0; |
402 |
|
|
403 |
do { |
while ((BitstreamPos(bs) >> 3) + 4 <= bs->length) { |
404 |
|
|
405 |
BitstreamByteAlign(bs); |
BitstreamByteAlign(bs); |
406 |
start_code = BitstreamShowBits(bs, 32); |
start_code = BitstreamShowBits(bs, 32); |
549 |
dec->time_inc_resolution = BitstreamGetBits(bs, 16); /* vop_time_increment_resolution */ |
dec->time_inc_resolution = BitstreamGetBits(bs, 16); /* vop_time_increment_resolution */ |
550 |
DPRINTF(XVID_DEBUG_HEADER,"vop_time_increment_resolution %i\n", dec->time_inc_resolution); |
DPRINTF(XVID_DEBUG_HEADER,"vop_time_increment_resolution %i\n", dec->time_inc_resolution); |
551 |
|
|
|
#if 0 |
|
|
dec->time_inc_resolution--; |
|
|
#endif |
|
|
|
|
552 |
if (dec->time_inc_resolution > 0) { |
if (dec->time_inc_resolution > 0) { |
553 |
dec->time_inc_bits = log2bin(dec->time_inc_resolution-1); |
dec->time_inc_bits = MAX(log2bin(dec->time_inc_resolution-1), 1); |
554 |
} else { |
} else { |
|
#if 0 |
|
|
dec->time_inc_bits = 0; |
|
|
#endif |
|
555 |
/* for "old" xvid compatibility, set time_inc_bits = 1 */ |
/* for "old" xvid compatibility, set time_inc_bits = 1 */ |
556 |
dec->time_inc_bits = 1; |
dec->time_inc_bits = 1; |
557 |
} |
} |
662 |
DPRINTF(XVID_DEBUG_HEADER, "load_intra_quant_mat\n"); |
DPRINTF(XVID_DEBUG_HEADER, "load_intra_quant_mat\n"); |
663 |
|
|
664 |
bs_get_matrix(bs, matrix); |
bs_get_matrix(bs, matrix); |
665 |
set_intra_matrix(matrix); |
set_intra_matrix(dec->mpeg_quant_matrices, matrix); |
666 |
} else |
} else |
667 |
set_intra_matrix(get_default_intra_matrix()); |
set_intra_matrix(dec->mpeg_quant_matrices, get_default_intra_matrix()); |
668 |
|
|
669 |
if (BitstreamGetBit(bs)) /* load_inter_quant_mat */ |
if (BitstreamGetBit(bs)) /* load_inter_quant_mat */ |
670 |
{ |
{ |
673 |
DPRINTF(XVID_DEBUG_HEADER, "load_inter_quant_mat\n"); |
DPRINTF(XVID_DEBUG_HEADER, "load_inter_quant_mat\n"); |
674 |
|
|
675 |
bs_get_matrix(bs, matrix); |
bs_get_matrix(bs, matrix); |
676 |
set_inter_matrix(matrix); |
set_inter_matrix(dec->mpeg_quant_matrices, matrix); |
677 |
} else |
} else |
678 |
set_inter_matrix(get_default_inter_matrix()); |
set_inter_matrix(dec->mpeg_quant_matrices, get_default_inter_matrix()); |
679 |
|
|
680 |
if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE) { |
if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE) { |
681 |
DPRINTF(XVID_DEBUG_ERROR, "greyscale matrix not supported\n"); |
DPRINTF(XVID_DEBUG_ERROR, "greyscale matrix not supported\n"); |
814 |
if (coding_type != B_VOP) { |
if (coding_type != B_VOP) { |
815 |
dec->last_time_base = dec->time_base; |
dec->last_time_base = dec->time_base; |
816 |
dec->time_base += time_incr; |
dec->time_base += time_incr; |
817 |
dec->time = time_increment; |
dec->time = dec->time_base*dec->time_inc_resolution + time_increment; |
818 |
|
dec->time_pp = (int32_t)(dec->time - dec->last_non_b_time); |
|
#if 0 |
|
|
dec->time_base * dec->time_inc_resolution + |
|
|
time_increment; |
|
|
#endif |
|
|
dec->time_pp = (uint32_t) |
|
|
(dec->time_inc_resolution + dec->time - dec->last_non_b_time)%dec->time_inc_resolution; |
|
819 |
dec->last_non_b_time = dec->time; |
dec->last_non_b_time = dec->time; |
820 |
} else { |
} else { |
821 |
dec->time = time_increment; |
dec->time = (dec->last_time_base + time_incr)*dec->time_inc_resolution + time_increment; |
822 |
#if 0 |
dec->time_bp = dec->time_pp - (int32_t)(dec->last_non_b_time - dec->time); |
|
(dec->last_time_base + |
|
|
time_incr) * dec->time_inc_resolution + time_increment; |
|
|
#endif |
|
|
dec->time_bp = (uint32_t) |
|
|
(dec->time_inc_resolution + dec->last_non_b_time - dec->time)%dec->time_inc_resolution; |
|
823 |
} |
} |
824 |
DPRINTF(XVID_DEBUG_HEADER,"time_pp=%i\n", dec->time_pp); |
DPRINTF(XVID_DEBUG_HEADER,"time_pp=%i\n", dec->time_pp); |
825 |
DPRINTF(XVID_DEBUG_HEADER,"time_bp=%i\n", dec->time_bp); |
DPRINTF(XVID_DEBUG_HEADER,"time_bp=%i\n", dec->time_bp); |
860 |
dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR && |
dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR && |
861 |
(coding_type == P_VOP || coding_type == I_VOP)) { |
(coding_type == P_VOP || coding_type == I_VOP)) { |
862 |
|
|
863 |
*reduced_resolution = BitstreamGetBit(bs); |
if (BitstreamGetBit(bs)); |
864 |
DPRINTF(XVID_DEBUG_HEADER, "reduced_resolution %i\n", *reduced_resolution); |
DPRINTF(XVID_DEBUG_ERROR, "RRV not supported (anymore)\n"); |
|
} |
|
|
else |
|
|
{ |
|
|
*reduced_resolution = 0; |
|
865 |
} |
} |
866 |
|
|
867 |
if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) { |
if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) { |
986 |
|
|
987 |
BitstreamSkip(bs, 32); /* user_data_start_code */ |
BitstreamSkip(bs, 32); /* user_data_start_code */ |
988 |
|
|
989 |
|
memset(tmp, 0, 256); |
990 |
tmp[0] = BitstreamShowBits(bs, 8); |
tmp[0] = BitstreamShowBits(bs, 8); |
991 |
|
|
992 |
for(i = 1; i < 256; i++){ |
for(i = 1; i < 256; i++){ |
1002 |
|
|
1003 |
/* read xvid bitstream version */ |
/* read xvid bitstream version */ |
1004 |
if(strncmp(tmp, "XviD", 4) == 0) { |
if(strncmp(tmp, "XviD", 4) == 0) { |
1005 |
|
if (tmp[strlen(tmp)-1] == 'C') { |
1006 |
|
sscanf(tmp, "XviD%dC", &dec->bs_version); |
1007 |
|
dec->cartoon_mode = 1; |
1008 |
|
} |
1009 |
|
else |
1010 |
sscanf(tmp, "XviD%d", &dec->bs_version); |
sscanf(tmp, "XviD%d", &dec->bs_version); |
1011 |
DPRINTF(XVID_DEBUG_HEADER, "xvid bitstream version=%i", dec->bs_version); |
|
1012 |
|
DPRINTF(XVID_DEBUG_HEADER, "xvid bitstream version=%i\n", dec->bs_version); |
1013 |
} |
} |
1014 |
|
|
1015 |
/* divx detection */ |
/* divx detection */ |
1032 |
BitstreamSkip(bs, 8); |
BitstreamSkip(bs, 8); |
1033 |
} |
} |
1034 |
} |
} |
|
while ((BitstreamPos(bs) >> 3) < bs->length); |
|
1035 |
|
|
1036 |
#if 0 |
#if 0 |
1037 |
DPRINTF("*** WARNING: no vop_start_code found"); |
DPRINTF("*** WARNING: no vop_start_code found"); |
1044 |
|
|
1045 |
static void |
static void |
1046 |
bs_put_matrix(Bitstream * bs, |
bs_put_matrix(Bitstream * bs, |
1047 |
const int16_t * matrix) |
const uint16_t * matrix) |
1048 |
{ |
{ |
1049 |
int i, j; |
int i, j; |
1050 |
const int last = matrix[scan_tables[0][63]]; |
const int last = matrix[scan_tables[0][63]]; |
1066 |
*/ |
*/ |
1067 |
void |
void |
1068 |
BitstreamWriteVolHeader(Bitstream * const bs, |
BitstreamWriteVolHeader(Bitstream * const bs, |
1069 |
const MBParam * pParam) |
const MBParam * pParam, |
1070 |
|
const FRAMEINFO * const frame) |
1071 |
{ |
{ |
1072 |
static const unsigned int vo_id = 0; |
static const unsigned int vo_id = 0; |
1073 |
static const unsigned int vol_id = 0; |
static const unsigned int vol_id = 0; |
1074 |
int vol_ver_id = 1; |
int vol_ver_id = 1; |
1075 |
int vol_type_ind = VIDOBJLAY_TYPE_SIMPLE; |
int vol_type_ind = VIDOBJLAY_TYPE_SIMPLE; |
1076 |
|
int vol_profile = pParam->profile; |
1077 |
|
|
1078 |
if ( (pParam->vol_flags & XVID_VOL_QUARTERPEL) || |
if ( (pParam->vol_flags & XVID_VOL_QUARTERPEL) || |
1079 |
(pParam->vol_flags & XVID_VOL_GMC) || |
(pParam->vol_flags & XVID_VOL_GMC) || |
1084 |
vol_type_ind = VIDOBJLAY_TYPE_ART_SIMPLE; |
vol_type_ind = VIDOBJLAY_TYPE_ART_SIMPLE; |
1085 |
} |
} |
1086 |
|
|
1087 |
if ((pParam->vol_flags & XVID_VOL_QUARTERPEL) || |
if ((pParam->vol_flags & (XVID_VOL_MPEGQUANT|XVID_VOL_QUARTERPEL|XVID_VOL_GMC|XVID_VOL_INTERLACING)) || |
1088 |
(pParam->vol_flags & XVID_VOL_GMC)) { |
pParam->max_bframes>0) { |
1089 |
vol_type_ind = VIDOBJLAY_TYPE_ASP; |
vol_type_ind = VIDOBJLAY_TYPE_ASP; |
1090 |
} |
} |
1091 |
|
|
1099 |
* byte aligned, and that always 1-8 padding bits have been written |
* byte aligned, and that always 1-8 padding bits have been written |
1100 |
*/ |
*/ |
1101 |
|
|
1102 |
if (pParam->profile) { |
if (!vol_profile) { |
1103 |
BitstreamPutBits(bs, VISOBJSEQ_START_CODE, 32); |
/* Profile was not set by client app, use the more permissive profile |
1104 |
BitstreamPutBits(bs, pParam->profile, 8); |
* compatible with the vol_type_id */ |
1105 |
|
switch(vol_type_ind) { |
1106 |
|
case VIDOBJLAY_TYPE_ASP: |
1107 |
|
vol_profile = 0xf5; /* ASP level 5 */ |
1108 |
|
break; |
1109 |
|
case VIDOBJLAY_TYPE_ART_SIMPLE: |
1110 |
|
vol_profile = 0x94; /* ARTS level 4 */ |
1111 |
|
break; |
1112 |
|
default: |
1113 |
|
vol_profile = 0x03; /* Simple level 3 */ |
1114 |
|
break; |
1115 |
|
} |
1116 |
} |
} |
1117 |
|
|
1118 |
|
/* Write the VOS header */ |
1119 |
|
BitstreamPutBits(bs, VISOBJSEQ_START_CODE, 32); |
1120 |
|
BitstreamPutBits(bs, vol_profile, 8); /* profile_and_level_indication */ |
1121 |
|
|
1122 |
|
|
1123 |
/* visual_object_start_code */ |
/* visual_object_start_code */ |
1124 |
BitstreamPad(bs); |
BitstreamPad(bs); |
1125 |
BitstreamPutBits(bs, VISOBJ_START_CODE, 32); |
BitstreamPutBits(bs, VISOBJ_START_CODE, 32); |
1182 |
|
|
1183 |
if (pParam->fincr>0) { |
if (pParam->fincr>0) { |
1184 |
BitstreamPutBit(bs, 1); /* fixed_vop_rate = 1 */ |
BitstreamPutBit(bs, 1); /* fixed_vop_rate = 1 */ |
1185 |
BitstreamPutBits(bs, pParam->fincr, log2bin(pParam->fbase)); /* fixed_vop_time_increment */ |
BitstreamPutBits(bs, pParam->fincr, MAX(log2bin(pParam->fbase-1),1)); /* fixed_vop_time_increment */ |
1186 |
}else{ |
}else{ |
1187 |
BitstreamPutBit(bs, 0); /* fixed_vop_rate = 0 */ |
BitstreamPutBit(bs, 0); /* fixed_vop_rate = 0 */ |
1188 |
} |
} |
1220 |
BitstreamPutBit(bs, pParam->vol_flags & XVID_VOL_MPEGQUANT); |
BitstreamPutBit(bs, pParam->vol_flags & XVID_VOL_MPEGQUANT); |
1221 |
|
|
1222 |
if ((pParam->vol_flags & XVID_VOL_MPEGQUANT)) { |
if ((pParam->vol_flags & XVID_VOL_MPEGQUANT)) { |
1223 |
BitstreamPutBit(bs, get_intra_matrix_status()); /* load_intra_quant_mat */ |
BitstreamPutBit(bs, is_custom_intra_matrix(pParam->mpeg_quant_matrices)); /* load_intra_quant_mat */ |
1224 |
if (get_intra_matrix_status()) { |
if(is_custom_intra_matrix(pParam->mpeg_quant_matrices)) |
1225 |
bs_put_matrix(bs, get_intra_matrix()); |
bs_put_matrix(bs, get_intra_matrix(pParam->mpeg_quant_matrices)); |
1226 |
} |
|
1227 |
|
BitstreamPutBit(bs, is_custom_inter_matrix(pParam->mpeg_quant_matrices)); /* load_inter_quant_mat */ |
1228 |
BitstreamPutBit(bs, get_inter_matrix_status()); /* load_inter_quant_mat */ |
if(is_custom_inter_matrix(pParam->mpeg_quant_matrices)) |
1229 |
if (get_inter_matrix_status()) { |
bs_put_matrix(bs, get_inter_matrix(pParam->mpeg_quant_matrices)); |
|
bs_put_matrix(bs, get_inter_matrix()); |
|
|
} |
|
|
|
|
1230 |
} |
} |
1231 |
|
|
1232 |
if (vol_ver_id != 1) { |
if (vol_ver_id != 1) { |
1250 |
|
|
1251 |
BitstreamPadAlways(bs); /* next_start_code(); */ |
BitstreamPadAlways(bs); /* next_start_code(); */ |
1252 |
|
|
1253 |
/* fake divx5 id, to ensure compatibility with divx5 decoder */ |
/* divx5 userdata string */ |
1254 |
#define DIVX5_ID "DivX000b000p" |
#define DIVX5_ID ((char *)"DivX503b1393") |
1255 |
if (pParam->max_bframes > 0 && (pParam->global_flags & XVID_GLOBAL_PACKED)) { |
if ((pParam->global_flags & XVID_GLOBAL_DIVX5_USERDATA)) { |
1256 |
BitstreamWriteUserData(bs, DIVX5_ID, strlen(DIVX5_ID)); |
BitstreamWriteUserData(bs, DIVX5_ID, strlen(DIVX5_ID)); |
1257 |
|
if (pParam->max_bframes > 0 && (pParam->global_flags & XVID_GLOBAL_PACKED)) |
1258 |
|
BitstreamPutBits(bs, 'p', 8); |
1259 |
} |
} |
1260 |
|
|
1261 |
/* xvid id */ |
/* xvid id */ |
1262 |
#define XVID_ID "XviD" XVID_BS_VERSION |
{ |
1263 |
BitstreamWriteUserData(bs, XVID_ID, strlen(XVID_ID)); |
const char xvid_user_format[] = "XviD%04d%c"; |
1264 |
|
char xvid_user_data[100]; |
1265 |
|
sprintf(xvid_user_data, |
1266 |
|
xvid_user_format, |
1267 |
|
XVID_BS_VERSION, |
1268 |
|
(frame->vop_flags & XVID_VOP_CARTOON)?'C':'\0'); |
1269 |
|
BitstreamWriteUserData(bs, xvid_user_data, strlen(xvid_user_data)); |
1270 |
|
} |
1271 |
} |
} |
1272 |
|
|
1273 |
|
|
1279 |
Bitstream * const bs, |
Bitstream * const bs, |
1280 |
const MBParam * pParam, |
const MBParam * pParam, |
1281 |
const FRAMEINFO * const frame, |
const FRAMEINFO * const frame, |
1282 |
int vop_coded) |
int vop_coded, |
1283 |
|
unsigned int quant) |
1284 |
{ |
{ |
1285 |
uint32_t i; |
uint32_t i; |
1286 |
|
|
1308 |
WRITE_MARKER(); |
WRITE_MARKER(); |
1309 |
|
|
1310 |
/* time_increment: value=nth_of_sec, nbits = log2(resolution) */ |
/* time_increment: value=nth_of_sec, nbits = log2(resolution) */ |
1311 |
|
BitstreamPutBits(bs, frame->ticks, MAX(log2bin(pParam->fbase-1), 1)); |
|
BitstreamPutBits(bs, frame->ticks, log2bin(pParam->fbase)); |
|
1312 |
#if 0 |
#if 0 |
1313 |
DPRINTF("[%i:%i] %c", |
DPRINTF("[%i:%i] %c", |
1314 |
frame->seconds, frame->ticks, |
frame->seconds, frame->ticks, |
1338 |
BitstreamPutBits(bs, frame->rounding_type, 1); |
BitstreamPutBits(bs, frame->rounding_type, 1); |
1339 |
|
|
1340 |
if ((frame->vol_flags & XVID_VOL_REDUCED_ENABLE)) |
if ((frame->vol_flags & XVID_VOL_REDUCED_ENABLE)) |
1341 |
BitstreamPutBit(bs, (frame->vop_flags & XVID_VOP_REDUCED)?1:0); |
BitstreamPutBit(bs, 0); |
1342 |
|
|
1343 |
BitstreamPutBits(bs, 0, 3); /* intra_dc_vlc_threshold */ |
BitstreamPutBits(bs, 0, 3); /* intra_dc_vlc_threshold */ |
1344 |
|
|
1372 |
|
|
1373 |
|
|
1374 |
#if 0 |
#if 0 |
1375 |
DPRINTF(XVID_DEBUG_HEADER, "quant = %i\n", frame->quant); |
DPRINTF(XVID_DEBUG_HEADER, "quant = %i\n", quant); |
1376 |
#endif |
#endif |
1377 |
|
|
1378 |
BitstreamPutBits(bs, frame->quant, 5); /* quantizer */ |
BitstreamPutBits(bs, quant, 5); /* quantizer */ |
1379 |
|
|
1380 |
if (frame->coding_type != I_VOP) |
if (frame->coding_type != I_VOP) |
1381 |
BitstreamPutBits(bs, frame->fcode, 3); /* forward_fixed_code */ |
BitstreamPutBits(bs, frame->fcode, 3); /* forward_fixed_code */ |
1387 |
|
|
1388 |
void |
void |
1389 |
BitstreamWriteUserData(Bitstream * const bs, |
BitstreamWriteUserData(Bitstream * const bs, |
1390 |
uint8_t * data, |
const char *data, |
1391 |
const int length) |
const unsigned int length) |
1392 |
{ |
{ |
1393 |
int i; |
int i; |
1394 |
|
|
1400 |
} |
} |
1401 |
|
|
1402 |
} |
} |
1403 |
|
|
1404 |
|
/* |
1405 |
|
* Group of VOP |
1406 |
|
*/ |
1407 |
|
void |
1408 |
|
BitstreamWriteGroupOfVopHeader(Bitstream * const bs, |
1409 |
|
const MBParam * pParam, |
1410 |
|
uint32_t is_closed_gov) |
1411 |
|
{ |
1412 |
|
int64_t time = (pParam->m_stamp + (pParam->fbase/2)) / pParam->fbase; |
1413 |
|
int hours, minutes, seconds; |
1414 |
|
|
1415 |
|
/* compute time_code */ |
1416 |
|
seconds = time % 60; time /= 60; |
1417 |
|
minutes = time % 60; time /= 60; |
1418 |
|
hours = time % 24; /* don't overflow */ |
1419 |
|
|
1420 |
|
BitstreamPutBits(bs, GRPOFVOP_START_CODE, 32); |
1421 |
|
BitstreamPutBits(bs, hours, 5); |
1422 |
|
BitstreamPutBits(bs, minutes, 6); |
1423 |
|
BitstreamPutBit(bs, 1); |
1424 |
|
BitstreamPutBits(bs, seconds, 6); |
1425 |
|
BitstreamPutBits(bs, is_closed_gov, 1); |
1426 |
|
BitstreamPutBits(bs, 0, 1); /* broken_link */ |
1427 |
|
} |
1428 |
|
|
1429 |
|
/* |
1430 |
|
* End of Sequence |
1431 |
|
*/ |
1432 |
|
void |
1433 |
|
BitstreamWriteEndOfSequence(Bitstream * const bs) |
1434 |
|
{ |
1435 |
|
BitstreamPadAlways(bs); |
1436 |
|
BitstreamPutBits(bs, VISOBJSEQ_STOP_CODE, 32); |
1437 |
|
} |
1438 |
|
|
1439 |
|
/* |
1440 |
|
* Video Packet (resync marker) |
1441 |
|
*/ |
1442 |
|
|
1443 |
|
void write_video_packet_header(Bitstream * const bs, |
1444 |
|
const MBParam * pParam, |
1445 |
|
const FRAMEINFO * const frame, |
1446 |
|
int mbnum) |
1447 |
|
{ |
1448 |
|
const int mbnum_bits = log2bin(pParam->mb_width * pParam->mb_height - 1); |
1449 |
|
uint32_t nbitsresyncmarker; |
1450 |
|
|
1451 |
|
if (frame->coding_type == I_VOP) |
1452 |
|
nbitsresyncmarker = NUMBITS_VP_RESYNC_MARKER; /* 16 zeros followed by a 1. */ |
1453 |
|
else if (frame->coding_type == P_VOP) |
1454 |
|
nbitsresyncmarker = NUMBITS_VP_RESYNC_MARKER-1 + frame->fcode; |
1455 |
|
else /* B_VOP */ |
1456 |
|
nbitsresyncmarker = MAX(NUMBITS_VP_RESYNC_MARKER, NUMBITS_VP_RESYNC_MARKER-1 + MAX(frame->fcode, frame->bcode)); |
1457 |
|
|
1458 |
|
BitstreamPadAlways(bs); |
1459 |
|
BitstreamPutBits(bs, RESYNC_MARKER, nbitsresyncmarker); |
1460 |
|
BitstreamPutBits(bs, mbnum, mbnum_bits); |
1461 |
|
BitstreamPutBits(bs, frame->quant, 5); |
1462 |
|
BitstreamPutBit(bs, 0); /* hec */ |
1463 |
|
} |