41 |
* * |
* * |
42 |
* Revision history: * |
* Revision history: * |
43 |
* * |
* * |
44 |
|
* 08.05.2002 add low_delay support for B_VOP decode * |
45 |
|
* MinChen <chenm001@163.com> * |
46 |
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* 06.05.2002 low_delay * |
47 |
|
* 06.05.2002 fixed fincr/fbase error * |
48 |
|
* 01.05.2002 added BVOP support to BitstreamWriteVopHeader * |
49 |
|
* 15.04.2002 rewrite log2bin use asm386 By MinChen <chenm001@163.com> * |
50 |
|
* 26.03.2002 interlacing support * |
51 |
* 03.03.2002 qmatrix writing * |
* 03.03.2002 qmatrix writing * |
52 |
* 03.03.2002 merged BITREADER and BITWRITER * |
* 03.03.2002 merged BITREADER and BITWRITER * |
53 |
* 30.02.2002 intra_dc_threshold support * |
* 30.02.2002 intra_dc_threshold support * |
61 |
#include "zigzag.h" |
#include "zigzag.h" |
62 |
#include "../quant/quant_matrix.h" |
#include "../quant/quant_matrix.h" |
63 |
|
|
64 |
static int __inline log2bin(int value) |
|
65 |
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static uint32_t __inline |
66 |
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log2bin(uint32_t value) |
67 |
{ |
{ |
68 |
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/* Changed by Chenm001 */ |
69 |
|
#ifndef WIN32 |
70 |
int n = 0; |
int n = 0; |
71 |
while (value) |
|
72 |
{ |
while (value) { |
73 |
value >>= 1; |
value >>= 1; |
74 |
n++; |
n++; |
75 |
} |
} |
76 |
return n; |
return n; |
77 |
|
#else |
78 |
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__asm { |
79 |
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bsr eax, value |
80 |
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inc eax |
81 |
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} |
82 |
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#endif |
83 |
} |
} |
84 |
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|
85 |
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|
86 |
static const uint32_t intra_dc_threshold_table[] = |
static const uint32_t intra_dc_threshold_table[] = { |
|
{ |
|
87 |
32, /* never use */ |
32, /* never use */ |
88 |
13, |
13, |
89 |
15, |
15, |
95 |
}; |
}; |
96 |
|
|
97 |
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|
98 |
void bs_get_matrix(Bitstream * bs, uint8_t * matrix) |
void |
99 |
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bs_get_matrix(Bitstream * bs, |
100 |
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uint8_t * matrix) |
101 |
{ |
{ |
102 |
int i = 0; |
int i = 0; |
103 |
int last, value = 0; |
int last, value = 0; |
104 |
|
|
105 |
do |
do { |
|
{ |
|
106 |
last = value; |
last = value; |
107 |
value = BitstreamGetBits(bs, 8); |
value = BitstreamGetBits(bs, 8); |
108 |
matrix[ scan_tables[0][i++] ] = value; |
matrix[ scan_tables[0][i++] ] = value; |
109 |
} |
} |
110 |
while (value != 0 && i < 64); |
while (value != 0 && i < 64); |
111 |
|
|
112 |
while (i < 64) |
while (i < 64) { |
|
{ |
|
113 |
matrix[ scan_tables[0][i++] ] = last; |
matrix[ scan_tables[0][i++] ] = last; |
114 |
} |
} |
115 |
} |
} |
119 |
returns coding_type, or -1 if error |
returns coding_type, or -1 if error |
120 |
*/ |
*/ |
121 |
|
|
122 |
int BitstreamReadHeaders(Bitstream * bs, DECODER * dec, uint32_t * rounding, uint32_t * quant, uint32_t * fcode, uint32_t * intra_dc_threshold) |
int |
123 |
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BitstreamReadHeaders(Bitstream * bs, |
124 |
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DECODER * dec, |
125 |
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uint32_t * rounding, |
126 |
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uint32_t * quant, |
127 |
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uint32_t * fcode_forward, |
128 |
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uint32_t * fcode_backward, |
129 |
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uint32_t * intra_dc_threshold) |
130 |
{ |
{ |
131 |
uint32_t vol_ver_id; |
uint32_t vol_ver_id; |
132 |
uint32_t time_inc_resolution; |
static uint32_t time_increment_resolution; |
133 |
uint32_t coding_type; |
uint32_t coding_type; |
134 |
uint32_t start_code; |
uint32_t start_code; |
135 |
|
uint32_t time_incr = 0; |
136 |
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int32_t time_increment; |
137 |
|
|
138 |
do |
do { |
|
{ |
|
139 |
BitstreamByteAlign(bs); |
BitstreamByteAlign(bs); |
140 |
start_code = BitstreamShowBits(bs, 32); |
start_code = BitstreamShowBits(bs, 32); |
141 |
|
|
142 |
if (start_code == VISOBJSEQ_START_CODE) |
if (start_code == VISOBJSEQ_START_CODE) { |
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{ |
|
143 |
// DEBUG("visual_object_sequence"); |
// DEBUG("visual_object_sequence"); |
144 |
BitstreamSkip(bs, 32); // visual_object_sequence_start_code |
BitstreamSkip(bs, 32); // visual_object_sequence_start_code |
145 |
BitstreamSkip(bs, 8); // profile_and_level_indication |
BitstreamSkip(bs, 8); // profile_and_level_indication |
146 |
} |
} else if (start_code == VISOBJSEQ_STOP_CODE) { |
|
else if (start_code == VISOBJSEQ_STOP_CODE) |
|
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{ |
|
147 |
BitstreamSkip(bs, 32); // visual_object_sequence_stop_code |
BitstreamSkip(bs, 32); // visual_object_sequence_stop_code |
148 |
} |
} else if (start_code == VISOBJ_START_CODE) { |
|
else if (start_code == VISOBJ_START_CODE) |
|
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{ |
|
149 |
// DEBUG("visual_object"); |
// DEBUG("visual_object"); |
150 |
BitstreamSkip(bs,32); // visual_object_start_code |
BitstreamSkip(bs,32); // visual_object_start_code |
151 |
if (BitstreamGetBit(bs)) // is_visual_object_identified |
if (BitstreamGetBit(bs)) // is_visual_object_identified |
152 |
{ |
{ |
153 |
vol_ver_id = BitstreamGetBits(bs,4); // visual_object_ver_id |
vol_ver_id = BitstreamGetBits(bs,4); // visual_object_ver_id |
154 |
BitstreamSkip(bs, 3); // visual_object_priority |
BitstreamSkip(bs, 3); // visual_object_priority |
155 |
} |
} else { |
|
else |
|
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{ |
|
156 |
vol_ver_id = 1; |
vol_ver_id = 1; |
157 |
} |
} |
158 |
|
|
178 |
BitstreamSkip(bs, 8); // matrix_coefficients |
BitstreamSkip(bs, 8); // matrix_coefficients |
179 |
} |
} |
180 |
} |
} |
181 |
} |
} else if ((start_code & ~0x1f) == VIDOBJ_START_CODE) { |
|
else if ((start_code & ~0x1f) == VIDOBJ_START_CODE) |
|
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{ |
|
182 |
BitstreamSkip(bs, 32); // video_object_start_code |
BitstreamSkip(bs, 32); // video_object_start_code |
183 |
} |
} else if ((start_code & ~0xf) == VIDOBJLAY_START_CODE) { |
|
else if ((start_code & ~0xf) == VIDOBJLAY_START_CODE) |
|
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{ |
|
184 |
// DEBUG("video_object_layer"); |
// DEBUG("video_object_layer"); |
185 |
BitstreamSkip(bs, 32); // video_object_layer_start_code |
BitstreamSkip(bs, 32); // video_object_layer_start_code |
186 |
|
|
187 |
BitstreamSkip(bs, 1); // random_accessible_vol |
BitstreamSkip(bs, 1); // random_accessible_vol |
188 |
|
|
189 |
// video_object_type_indication |
// video_object_type_indication |
190 |
if (BitstreamShowBits(bs, 8) != VIDOBJLAY_TYPE_SIMPLE && |
if (BitstreamShowBits(bs, 8) != VIDOBJLAY_TYPE_SIMPLE && BitstreamShowBits(bs, 8) != VIDOBJLAY_TYPE_CORE && BitstreamShowBits(bs, 8) != VIDOBJLAY_TYPE_MAIN && BitstreamShowBits(bs, 8) != 0) // BUGGY DIVX |
|
BitstreamShowBits(bs, 8) != VIDOBJLAY_TYPE_CORE && |
|
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BitstreamShowBits(bs, 8) != VIDOBJLAY_TYPE_MAIN && |
|
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BitstreamShowBits(bs, 8) != 0) // BUGGY DIVX |
|
191 |
{ |
{ |
192 |
DEBUG1("video_object_type_indication not supported", BitstreamShowBits(bs, 8)); |
DEBUG1("video_object_type_indication not supported", |
193 |
|
BitstreamShowBits(bs, 8)); |
194 |
return -1; |
return -1; |
195 |
} |
} |
196 |
BitstreamSkip(bs, 8); |
BitstreamSkip(bs, 8); |
201 |
DEBUG("+ is_object_layer_identifier"); |
DEBUG("+ is_object_layer_identifier"); |
202 |
vol_ver_id = BitstreamGetBits(bs,4); // video_object_layer_verid |
vol_ver_id = BitstreamGetBits(bs,4); // video_object_layer_verid |
203 |
BitstreamSkip(bs, 3); // video_object_layer_priority |
BitstreamSkip(bs, 3); // video_object_layer_priority |
204 |
} |
} else { |
|
else |
|
|
{ |
|
205 |
vol_ver_id = 1; |
vol_ver_id = 1; |
206 |
} |
} |
207 |
//DEBUGI("vol_ver_id", vol_ver_id); |
//DEBUGI("vol_ver_id", vol_ver_id); |
217 |
{ |
{ |
218 |
DEBUG("+ vol_control_parameters"); |
DEBUG("+ vol_control_parameters"); |
219 |
BitstreamSkip(bs, 2); // chroma_format |
BitstreamSkip(bs, 2); // chroma_format |
220 |
BitstreamSkip(bs, 1); // low_delay |
dec->low_delay = BitstreamGetBit(bs); // low_delay |
221 |
if (BitstreamGetBit(bs)) // vbv_parameters |
if (BitstreamGetBit(bs)) // vbv_parameters |
222 |
{ |
{ |
223 |
DEBUG("+ vbv_parameters"); |
DEBUG("+ vbv_parameters"); |
239 |
dec->shape = BitstreamGetBits(bs, 2); // video_object_layer_shape |
dec->shape = BitstreamGetBits(bs, 2); // video_object_layer_shape |
240 |
// DEBUG1("shape", dec->shape); |
// DEBUG1("shape", dec->shape); |
241 |
|
|
242 |
if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE && vol_ver_id != 1) |
if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE && vol_ver_id != 1) { |
|
{ |
|
243 |
BitstreamSkip(bs, 4); // video_object_layer_shape_extension |
BitstreamSkip(bs, 4); // video_object_layer_shape_extension |
244 |
} |
} |
245 |
|
|
246 |
READ_MARKER(); |
READ_MARKER(); |
247 |
|
|
248 |
time_inc_resolution = BitstreamGetBits(bs, 16); // vop_time_increment_resolution |
// *************************** for decode B-frame time *********************** |
249 |
time_inc_resolution--; |
time_increment_resolution = BitstreamGetBits(bs, 16); // vop_time_increment_resolution |
250 |
if (time_inc_resolution > 0) |
time_increment_resolution--; |
251 |
{ |
//DEBUG1("time_increment_resolution=",time_increment_resolution); |
252 |
dec->time_inc_bits = log2bin(time_inc_resolution); |
if (time_increment_resolution > 0) { |
253 |
} |
dec->time_inc_bits = log2bin(time_increment_resolution); |
254 |
else |
} else { |
|
{ |
|
255 |
// dec->time_inc_bits = 0; |
// dec->time_inc_bits = 0; |
256 |
|
|
257 |
// for "old" xvid compatibility, set time_inc_bits = 1 |
// for "old" xvid compatibility, set time_inc_bits = 1 |
265 |
BitstreamSkip(bs, dec->time_inc_bits); // fixed_vop_time_increment |
BitstreamSkip(bs, dec->time_inc_bits); // fixed_vop_time_increment |
266 |
} |
} |
267 |
|
|
268 |
if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) |
if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) { |
|
{ |
|
269 |
|
|
270 |
if (dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR) |
if (dec->shape == VIDOBJLAY_SHAPE_RECTANGULAR) { |
|
{ |
|
271 |
uint32_t width, height; |
uint32_t width, height; |
272 |
|
|
273 |
READ_MARKER(); |
READ_MARKER(); |
278 |
//DEBUGI("height", height); |
//DEBUGI("height", height); |
279 |
READ_MARKER(); |
READ_MARKER(); |
280 |
|
|
281 |
if (width != dec->width || height != dec->height) |
if (width != dec->width || height != dec->height) { |
|
{ |
|
282 |
DEBUG("FATAL: video dimension discrepancy ***"); |
DEBUG("FATAL: video dimension discrepancy ***"); |
283 |
DEBUG2("bitstream width/height", width, height); |
DEBUG2("bitstream width/height", width, height); |
284 |
DEBUG2("param width/height", dec->width, dec->height); |
DEBUG2("param width/height", dec->width, dec->height); |
287 |
|
|
288 |
} |
} |
289 |
|
|
290 |
if (BitstreamGetBit(bs)) // interlaced |
if ((dec->interlacing = BitstreamGetBit(bs))) { |
291 |
{ |
DEBUG("vol: interlacing"); |
|
DEBUG("TODO: interlaced"); |
|
|
// TODO |
|
|
return -1; |
|
292 |
} |
} |
293 |
|
|
294 |
if (!BitstreamGetBit(bs)) // obmc_disable |
if (!BitstreamGetBit(bs)) // obmc_disable |
304 |
return -1; |
return -1; |
305 |
} |
} |
306 |
|
|
307 |
if (vol_ver_id != 1 && dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) |
if (vol_ver_id != 1 && |
308 |
{ |
dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) { |
309 |
BitstreamSkip(bs, 1); // sadct_disable |
BitstreamSkip(bs, 1); // sadct_disable |
310 |
} |
} |
311 |
|
|
314 |
DEBUG("+ not_8_bit [IGNORED/TODO]"); |
DEBUG("+ not_8_bit [IGNORED/TODO]"); |
315 |
dec->quant_bits = BitstreamGetBits(bs, 4); // quant_precision |
dec->quant_bits = BitstreamGetBits(bs, 4); // quant_precision |
316 |
BitstreamSkip(bs, 4); // bits_per_pixel |
BitstreamSkip(bs, 4); // bits_per_pixel |
317 |
} |
} else { |
|
else |
|
|
{ |
|
318 |
dec->quant_bits = 5; |
dec->quant_bits = 5; |
319 |
} |
} |
320 |
|
|
321 |
if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE) |
if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE) { |
|
{ |
|
322 |
BitstreamSkip(bs, 1); // no_gray_quant_update |
BitstreamSkip(bs, 1); // no_gray_quant_update |
323 |
BitstreamSkip(bs, 1); // composition_method |
BitstreamSkip(bs, 1); // composition_method |
324 |
BitstreamSkip(bs, 1); // linear_composition |
BitstreamSkip(bs, 1); // linear_composition |
327 |
dec->quant_type = BitstreamGetBit(bs); // quant_type |
dec->quant_type = BitstreamGetBit(bs); // quant_type |
328 |
// DEBUG1("**** quant_type", dec->quant_type); |
// DEBUG1("**** quant_type", dec->quant_type); |
329 |
|
|
330 |
if (dec->quant_type) |
if (dec->quant_type) { |
|
{ |
|
331 |
if (BitstreamGetBit(bs)) // load_intra_quant_mat |
if (BitstreamGetBit(bs)) // load_intra_quant_mat |
332 |
{ |
{ |
333 |
uint8_t matrix[64]; |
uint8_t matrix[64]; |
334 |
|
|
335 |
bs_get_matrix(bs, matrix); |
bs_get_matrix(bs, matrix); |
336 |
set_intra_matrix(matrix); |
set_intra_matrix(matrix); |
337 |
} |
} else |
|
else |
|
338 |
set_intra_matrix(get_default_intra_matrix()); |
set_intra_matrix(get_default_intra_matrix()); |
339 |
|
|
340 |
if (BitstreamGetBit(bs)) // load_inter_quant_mat |
if (BitstreamGetBit(bs)) // load_inter_quant_mat |
341 |
{ |
{ |
342 |
uint8_t matrix[64]; |
uint8_t matrix[64]; |
343 |
|
|
344 |
bs_get_matrix(bs, matrix); |
bs_get_matrix(bs, matrix); |
345 |
set_inter_matrix(matrix); |
set_inter_matrix(matrix); |
346 |
} |
} else |
|
else |
|
347 |
set_inter_matrix(get_default_inter_matrix()); |
set_inter_matrix(get_default_inter_matrix()); |
348 |
|
|
349 |
if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE) |
if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE) { |
|
{ |
|
350 |
// TODO |
// TODO |
351 |
DEBUG("TODO: grayscale matrix stuff"); |
DEBUG("TODO: grayscale matrix stuff"); |
352 |
return -1; |
return -1; |
355 |
} |
} |
356 |
|
|
357 |
|
|
358 |
if (vol_ver_id != 1) |
if (vol_ver_id != 1) { |
|
{ |
|
359 |
dec->quarterpel = BitstreamGetBit(bs); // quarter_sampe |
dec->quarterpel = BitstreamGetBit(bs); // quarter_sampe |
360 |
if (dec->quarterpel) |
if (dec->quarterpel) { |
|
{ |
|
361 |
DEBUG("IGNORED/TODO: quarter_sample"); |
DEBUG("IGNORED/TODO: quarter_sample"); |
362 |
} |
} |
363 |
} |
} else { |
|
else |
|
|
{ |
|
364 |
dec->quarterpel = 0; |
dec->quarterpel = 0; |
365 |
} |
} |
366 |
|
|
383 |
BitstreamSkip(bs, 1); // reversible_vlc |
BitstreamSkip(bs, 1); // reversible_vlc |
384 |
} |
} |
385 |
|
|
386 |
if (vol_ver_id != 1) |
if (vol_ver_id != 1) { |
|
{ |
|
387 |
if (BitstreamGetBit(bs)) // newpred_enable |
if (BitstreamGetBit(bs)) // newpred_enable |
388 |
{ |
{ |
389 |
DEBUG("+ newpred_enable"); |
DEBUG("+ newpred_enable"); |
398 |
} |
} |
399 |
} |
} |
400 |
|
|
401 |
if (BitstreamGetBit(bs)) // scalability |
if ((dec->scalability = BitstreamGetBit(bs))) // scalability |
402 |
{ |
{ |
403 |
// TODO |
// TODO |
404 |
DEBUG("TODO: scalability"); |
DEBUG("TODO: scalability"); |
405 |
return -1; |
return -1; |
406 |
} |
} |
407 |
} |
} else // dec->shape == BINARY_ONLY |
|
else // dec->shape == BINARY_ONLY |
|
|
{ |
|
|
if (vol_ver_id != 1) |
|
408 |
{ |
{ |
409 |
|
if (vol_ver_id != 1) { |
410 |
if (BitstreamGetBit(bs)) // scalability |
if (BitstreamGetBit(bs)) // scalability |
411 |
{ |
{ |
412 |
// TODO |
// TODO |
418 |
|
|
419 |
} |
} |
420 |
|
|
421 |
} |
} else if (start_code == GRPOFVOP_START_CODE) { |
|
else if (start_code == GRPOFVOP_START_CODE) |
|
|
{ |
|
422 |
// DEBUG("group_of_vop"); |
// DEBUG("group_of_vop"); |
423 |
BitstreamSkip(bs, 32); |
BitstreamSkip(bs, 32); |
424 |
{ |
{ |
425 |
int hours, minutes, seconds; |
int hours, minutes, seconds; |
426 |
|
|
427 |
hours = BitstreamGetBits(bs, 5); |
hours = BitstreamGetBits(bs, 5); |
428 |
minutes = BitstreamGetBits(bs, 6); |
minutes = BitstreamGetBits(bs, 6); |
429 |
READ_MARKER(); |
READ_MARKER(); |
432 |
} |
} |
433 |
BitstreamSkip(bs, 1); // closed_gov |
BitstreamSkip(bs, 1); // closed_gov |
434 |
BitstreamSkip(bs, 1); // broken_link |
BitstreamSkip(bs, 1); // broken_link |
435 |
} |
} else if (start_code == VOP_START_CODE) { |
|
else if (start_code == VOP_START_CODE) |
|
|
{ |
|
436 |
// DEBUG("vop_start_code"); |
// DEBUG("vop_start_code"); |
437 |
BitstreamSkip(bs, 32); // vop_start_code |
BitstreamSkip(bs, 32); // vop_start_code |
438 |
|
|
439 |
coding_type = BitstreamGetBits(bs, 2); // vop_coding_type |
coding_type = BitstreamGetBits(bs, 2); // vop_coding_type |
440 |
//DEBUG1("coding_type", coding_type); |
//DEBUG1("coding_type", coding_type); |
441 |
|
|
442 |
while (BitstreamGetBit(bs) != 0) ; // time_base |
// *************************** for decode B-frame time *********************** |
443 |
|
while (BitstreamGetBit(bs) != 0) // time_base |
444 |
|
time_incr++; |
445 |
|
|
446 |
READ_MARKER(); |
READ_MARKER(); |
447 |
|
|
448 |
//DEBUG1("time_inc_bits", dec->time_inc_bits); |
//DEBUG1("time_inc_bits", dec->time_inc_bits); |
449 |
//DEBUG1("vop_time_incr", BitstreamShowBits(bs, dec->time_inc_bits)); |
//DEBUG1("vop_time_incr", BitstreamShowBits(bs, dec->time_inc_bits)); |
450 |
if (dec->time_inc_bits) |
if (dec->time_inc_bits) { |
451 |
{ |
//BitstreamSkip(bs, dec->time_inc_bits); // vop_time_increment |
452 |
BitstreamSkip(bs, dec->time_inc_bits); // vop_time_increment |
time_increment = (BitstreamGetBits(bs, dec->time_inc_bits)); // vop_time_increment |
453 |
|
} |
454 |
|
if (coding_type != B_VOP) { |
455 |
|
dec->last_time_base = dec->time_base; |
456 |
|
dec->time_base += time_incr; |
457 |
|
dec->time = |
458 |
|
dec->time_base * time_increment_resolution + |
459 |
|
time_increment; |
460 |
|
dec->time_pp = (uint32_t) (dec->time - dec->last_non_b_time); |
461 |
|
dec->last_non_b_time = dec->time; |
462 |
|
} else { |
463 |
|
dec->time = |
464 |
|
(dec->last_time_base + |
465 |
|
time_incr) * time_increment_resolution + time_increment; |
466 |
|
dec->time_bp = (uint32_t) (dec->last_non_b_time - dec->time); |
467 |
} |
} |
468 |
|
//DEBUG1("time_increment=",time_increment); |
469 |
|
|
470 |
READ_MARKER(); |
READ_MARKER(); |
471 |
|
|
479 |
} |
} |
480 |
*/ |
*/ |
481 |
|
|
482 |
if (coding_type != I_VOP) |
// fix a little bug by MinChen <chenm002@163.com> |
483 |
{ |
if ((dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) && |
484 |
|
(coding_type == P_VOP)) { |
485 |
*rounding = BitstreamGetBit(bs); // rounding_type |
*rounding = BitstreamGetBit(bs); // rounding_type |
486 |
//DEBUG1("rounding", *rounding); |
//DEBUG1("rounding", *rounding); |
487 |
} |
} |
491 |
} |
} |
492 |
*/ |
*/ |
493 |
|
|
494 |
if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) |
if (dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) { |
|
{ |
|
495 |
uint32_t width, height; |
uint32_t width, height; |
496 |
uint32_t horiz_mc_ref, vert_mc_ref; |
uint32_t horiz_mc_ref, vert_mc_ref; |
497 |
|
|
515 |
} |
} |
516 |
|
|
517 |
|
|
518 |
if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) |
if (dec->shape != VIDOBJLAY_SHAPE_BINARY_ONLY) { |
|
{ |
|
519 |
// intra_dc_vlc_threshold |
// intra_dc_vlc_threshold |
520 |
*intra_dc_threshold = intra_dc_threshold_table[ BitstreamGetBits(bs,3) ]; |
*intra_dc_threshold = |
521 |
|
intra_dc_threshold_table[BitstreamGetBits(bs, 3)]; |
522 |
|
|
523 |
/* if (interlaced) |
if (dec->interlacing) { |
524 |
{ |
if ((dec->top_field_first = BitstreamGetBit(bs))) { |
525 |
BitstreamSkip(bs, 1); // top_field_first |
DEBUG("vop: top_field_first"); |
526 |
BitstreamSkip(bs, 1); // alternative_vertical_scan_flag |
} |
527 |
*/ |
if ((dec->alternate_vertical_scan = BitstreamGetBit(bs))) { |
528 |
|
DEBUG("vop: alternate_vertical_scan"); |
529 |
|
} |
530 |
} |
} |
531 |
|
} |
532 |
|
|
533 |
|
if ((*quant = BitstreamGetBits(bs, dec->quant_bits)) < 1) // vop_quant |
534 |
|
*quant = 1; |
535 |
|
|
|
*quant = BitstreamGetBits(bs, dec->quant_bits); // vop_quant |
|
536 |
//DEBUG1("quant", *quant); |
//DEBUG1("quant", *quant); |
537 |
|
|
538 |
if (coding_type != I_VOP) |
if (coding_type != I_VOP) { |
539 |
{ |
*fcode_forward = BitstreamGetBits(bs, 3); // fcode_forward |
|
*fcode = BitstreamGetBits(bs, 3); // fcode_forward |
|
540 |
} |
} |
541 |
|
|
542 |
if (coding_type == B_VOP) |
if (coding_type == B_VOP) { |
543 |
{ |
*fcode_backward = BitstreamGetBits(bs, 3); // fcode_backward |
|
// *fcode_backward = BitstreamGetBits(bs, 3); // fcode_backward |
|
544 |
} |
} |
545 |
return coding_type; |
if (!dec->scalability) { |
546 |
|
if ((dec->shape != VIDOBJLAY_SHAPE_RECTANGULAR) && |
547 |
|
(coding_type != I_VOP)) { |
548 |
|
BitstreamSkip(bs, 1); // vop_shape_coding_type |
549 |
} |
} |
550 |
else if (start_code == USERDATA_START_CODE) |
} |
551 |
{ |
return coding_type; |
552 |
|
} else if (start_code == USERDATA_START_CODE) { |
553 |
// DEBUG("user_data"); |
// DEBUG("user_data"); |
554 |
BitstreamSkip(bs, 32); // user_data_start_code |
BitstreamSkip(bs, 32); // user_data_start_code |
555 |
} |
} else // start_code == ? |
|
else // start_code == ? |
|
|
{ |
|
|
if (BitstreamShowBits(bs, 24) == 0x000001) |
|
556 |
{ |
{ |
557 |
DEBUG1("*** WARNING: unknown start_code", BitstreamShowBits(bs, 32)); |
if (BitstreamShowBits(bs, 24) == 0x000001) { |
558 |
|
DEBUG1("*** WARNING: unknown start_code", |
559 |
|
BitstreamShowBits(bs, 32)); |
560 |
} |
} |
561 |
BitstreamSkip(bs, 8); |
BitstreamSkip(bs, 8); |
562 |
} |
} |
570 |
|
|
571 |
/* write custom quant matrix */ |
/* write custom quant matrix */ |
572 |
|
|
573 |
static void bs_put_matrix(Bitstream * bs, const int16_t *matrix) |
static void |
574 |
|
bs_put_matrix(Bitstream * bs, |
575 |
|
const int16_t * matrix) |
576 |
{ |
{ |
577 |
int i, j; |
int i, j; |
578 |
const int last = matrix[scan_tables[0][63]]; |
const int last = matrix[scan_tables[0][63]]; |
579 |
|
|
580 |
for (j = 63; j >= 0 && matrix[scan_tables[0][j - 1]] == last; j--) ; |
for (j = 63; j >= 0 && matrix[scan_tables[0][j - 1]] == last; j--) ; |
581 |
|
|
582 |
for (i = 0; i <= j; i++) |
for (i = 0; i <= j; i++) { |
|
{ |
|
583 |
BitstreamPutBits(bs, matrix[scan_tables[0][i]], 8); |
BitstreamPutBits(bs, matrix[scan_tables[0][i]], 8); |
584 |
} |
} |
585 |
|
|
586 |
if (j < 63) |
if (j < 63) { |
|
{ |
|
587 |
BitstreamPutBits(bs, 0, 8); |
BitstreamPutBits(bs, 0, 8); |
588 |
} |
} |
589 |
} |
} |
592 |
/* |
/* |
593 |
write vol header |
write vol header |
594 |
*/ |
*/ |
595 |
void BitstreamWriteVolHeader(Bitstream * const bs, |
void |
596 |
const int width, |
BitstreamWriteVolHeader(Bitstream * const bs, |
597 |
const int height, |
const MBParam * pParam, |
598 |
const int quant_type) |
const FRAMEINFO * frame) |
599 |
{ |
{ |
600 |
// video object_start_code & vo_id |
// video object_start_code & vo_id |
601 |
BitstreamPad(bs); |
BitstreamPad(bs); |
610 |
BitstreamPutBits(bs, 0, 8); // video_object_type_indication |
BitstreamPutBits(bs, 0, 8); // video_object_type_indication |
611 |
BitstreamPutBit(bs, 0); // is_object_layer_identified (0=not given) |
BitstreamPutBit(bs, 0); // is_object_layer_identified (0=not given) |
612 |
BitstreamPutBits(bs, 1, 4); // aspect_ratio_info (1=1:1) |
BitstreamPutBits(bs, 1, 4); // aspect_ratio_info (1=1:1) |
613 |
BitstreamPutBit(bs, 0); // vol_control_parameters (0=not given) |
|
614 |
|
#ifdef BFRAMES |
615 |
|
if (pParam->max_bframes > 0) { |
616 |
|
dprintf("low_delay=1"); |
617 |
|
BitstreamPutBit(bs, 1); // vol_control_parameters |
618 |
|
BitstreamPutBits(bs, 1, 2); // chroma_format 1="4:2:0" |
619 |
|
BitstreamPutBit(bs, 0); // low_delay |
620 |
|
BitstreamPutBit(bs, 0); // vbv_parameters (0=not given) |
621 |
|
} else |
622 |
|
#endif |
623 |
|
{ |
624 |
|
BitstreamPutBits(bs, 0, 1); // vol_control_parameters (0=not given) |
625 |
|
} |
626 |
|
|
627 |
|
|
628 |
BitstreamPutBits(bs, 0, 2); // video_object_layer_shape (0=rectangular) |
BitstreamPutBits(bs, 0, 2); // video_object_layer_shape (0=rectangular) |
629 |
|
|
630 |
WRITE_MARKER(); |
WRITE_MARKER(); |
634 |
25fps res=25 inc=1 |
25fps res=25 inc=1 |
635 |
29.97fps res=30000 inc=1001 |
29.97fps res=30000 inc=1001 |
636 |
*/ |
*/ |
637 |
|
#ifdef BFRAMES |
638 |
|
BitstreamPutBits(bs, pParam->fbase, 16); |
639 |
|
#else |
640 |
BitstreamPutBits(bs, 2, 16); |
BitstreamPutBits(bs, 2, 16); |
641 |
|
#endif |
642 |
|
|
643 |
WRITE_MARKER(); |
WRITE_MARKER(); |
644 |
|
|
649 |
// BitstreamPutBits(bs, 0, 15); |
// BitstreamPutBits(bs, 0, 15); |
650 |
|
|
651 |
WRITE_MARKER(); |
WRITE_MARKER(); |
652 |
BitstreamPutBits(bs, width, 13); // width |
BitstreamPutBits(bs, pParam->width, 13); // width |
653 |
WRITE_MARKER(); |
WRITE_MARKER(); |
654 |
BitstreamPutBits(bs, height, 13); // height |
BitstreamPutBits(bs, pParam->height, 13); // height |
655 |
WRITE_MARKER(); |
WRITE_MARKER(); |
656 |
|
|
657 |
BitstreamPutBit(bs, 0); // interlace |
BitstreamPutBit(bs, frame->global_flags & XVID_INTERLACING); // interlace |
658 |
BitstreamPutBit(bs, 1); // obmc_disable (overlapped block motion compensation) |
BitstreamPutBit(bs, 1); // obmc_disable (overlapped block motion compensation) |
659 |
BitstreamPutBit(bs, 0); // sprite_enable |
BitstreamPutBit(bs, 0); // sprite_enable |
660 |
BitstreamPutBit(bs, 0); // not_in_bit |
BitstreamPutBit(bs, 0); // not_in_bit |
661 |
|
|
662 |
// quant_type 0=h.263 1=mpeg4(quantizer tables) |
// quant_type 0=h.263 1=mpeg4(quantizer tables) |
663 |
BitstreamPutBit(bs, quant_type); |
BitstreamPutBit(bs, pParam->m_quant_type); |
664 |
|
|
665 |
if (quant_type) |
if (pParam->m_quant_type) { |
|
{ |
|
666 |
BitstreamPutBit(bs, get_intra_matrix_status()); // load_intra_quant_mat |
BitstreamPutBit(bs, get_intra_matrix_status()); // load_intra_quant_mat |
667 |
if (get_intra_matrix_status()) |
if (get_intra_matrix_status()) { |
|
{ |
|
668 |
bs_put_matrix(bs, get_intra_matrix()); |
bs_put_matrix(bs, get_intra_matrix()); |
669 |
} |
} |
670 |
|
|
671 |
BitstreamPutBit(bs, get_inter_matrix_status()); // load_inter_quant_mat |
BitstreamPutBit(bs, get_inter_matrix_status()); // load_inter_quant_mat |
672 |
if (get_inter_matrix_status()) |
if (get_inter_matrix_status()) { |
|
{ |
|
673 |
bs_put_matrix(bs, get_inter_matrix()); |
bs_put_matrix(bs, get_inter_matrix()); |
674 |
} |
} |
675 |
|
|
690 |
time_inc = nth of a second since last resync |
time_inc = nth of a second since last resync |
691 |
(decoder uses these values to determine precise time since last resync) |
(decoder uses these values to determine precise time since last resync) |
692 |
*/ |
*/ |
693 |
void BitstreamWriteVopHeader(Bitstream * const bs, |
void |
694 |
VOP_TYPE prediction_type, |
BitstreamWriteVopHeader(Bitstream * const bs, |
695 |
const int rounding_type, |
const MBParam * pParam, |
696 |
const uint32_t quant, |
const FRAMEINFO * frame) |
697 |
const uint32_t fcode) |
{ |
698 |
{ |
#ifdef BFRAMES |
699 |
|
uint32_t i; |
700 |
|
#endif |
701 |
BitstreamPad(bs); |
BitstreamPad(bs); |
702 |
BitstreamPutBits(bs, VOP_START_CODE, 32); |
BitstreamPutBits(bs, VOP_START_CODE, 32); |
703 |
|
|
704 |
BitstreamPutBits(bs, prediction_type, 2); |
BitstreamPutBits(bs, frame->coding_type, 2); |
705 |
|
|
706 |
// time_base = 0 write n x PutBit(1), PutBit(0) |
// time_base = 0 write n x PutBit(1), PutBit(0) |
707 |
|
#ifdef BFRAMES |
708 |
|
for (i = 0; i < frame->seconds; i++) { |
709 |
|
BitstreamPutBit(bs, 1); |
710 |
|
} |
711 |
|
BitstreamPutBit(bs, 0); |
712 |
|
#else |
713 |
BitstreamPutBits(bs, 0, 1); |
BitstreamPutBits(bs, 0, 1); |
714 |
|
#endif |
715 |
|
|
716 |
WRITE_MARKER(); |
WRITE_MARKER(); |
717 |
|
|
718 |
// time_increment: value=nth_of_sec, nbits = log2(resolution) |
// time_increment: value=nth_of_sec, nbits = log2(resolution) |
719 |
|
#ifdef BFRAMES |
720 |
|
BitstreamPutBits(bs, frame->ticks, log2bin(pParam->fbase)); |
721 |
|
dprintf("[%i:%i] %c\n", frame->seconds, frame->ticks, |
722 |
|
frame->coding_type == I_VOP ? 'I' : frame->coding_type == |
723 |
|
P_VOP ? 'P' : 'B'); |
724 |
|
#else |
725 |
BitstreamPutBits(bs, 1, 1); |
BitstreamPutBits(bs, 1, 1); |
726 |
|
#endif |
727 |
|
|
728 |
WRITE_MARKER(); |
WRITE_MARKER(); |
729 |
|
|
730 |
BitstreamPutBits(bs, 1, 1); // vop_coded |
BitstreamPutBits(bs, 1, 1); // vop_coded |
731 |
|
|
732 |
if (prediction_type != I_VOP) |
if (frame->coding_type == P_VOP) |
733 |
BitstreamPutBits(bs, rounding_type, 1); |
BitstreamPutBits(bs, frame->rounding_type, 1); |
734 |
|
|
735 |
BitstreamPutBits(bs, 0, 3); // intra_dc_vlc_threshold |
BitstreamPutBits(bs, 0, 3); // intra_dc_vlc_threshold |
736 |
|
|
737 |
BitstreamPutBits(bs, quant, 5); // quantizer |
if (frame->global_flags & XVID_INTERLACING) { |
738 |
|
BitstreamPutBit(bs, 1); // top field first |
739 |
|
BitstreamPutBit(bs, 0); // alternate vertical scan |
740 |
|
} |
741 |
|
|
742 |
|
BitstreamPutBits(bs, frame->quant, 5); // quantizer |
743 |
|
|
744 |
|
if (frame->coding_type != I_VOP) |
745 |
|
BitstreamPutBits(bs, frame->fcode, 3); // forward_fixed_code |
746 |
|
|
747 |
|
if (frame->coding_type == B_VOP) |
748 |
|
BitstreamPutBits(bs, frame->bcode, 3); // backward_fixed_code |
749 |
|
|
|
if (prediction_type != I_VOP) |
|
|
BitstreamPutBits(bs, fcode, 3); // fixed_code = [1,4] |
|
750 |
} |
} |