19 |
* along with this program ; if not, write to the Free Software |
* along with this program ; if not, write to the Free Software |
20 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
21 |
* |
* |
22 |
* $Id: bitstream.h,v 1.23 2006-04-14 07:24:47 Skal Exp $ |
* $Id: bitstream.h,v 1.25 2010-12-18 16:02:00 Isibaar Exp $ |
23 |
* |
* |
24 |
****************************************************************************/ |
****************************************************************************/ |
25 |
|
|
137 |
|
|
138 |
void BitstreamWriteVolHeader(Bitstream * const bs, |
void BitstreamWriteVolHeader(Bitstream * const bs, |
139 |
const MBParam * pParam, |
const MBParam * pParam, |
140 |
const FRAMEINFO * const frame); |
const FRAMEINFO * const frame, |
141 |
|
const int num_slices); |
142 |
|
|
143 |
void BitstreamWriteVopHeader(Bitstream * const bs, |
void BitstreamWriteVopHeader(Bitstream * const bs, |
144 |
const MBParam * pParam, |
const MBParam * pParam, |
163 |
const FRAMEINFO * const frame, |
const FRAMEINFO * const frame, |
164 |
int mbnum); |
int mbnum); |
165 |
|
|
166 |
|
/***************************************************************************** |
167 |
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* Bitstream |
168 |
|
****************************************************************************/ |
169 |
|
|
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/* Input buffer should be readable as full chunks of 8bytes, including |
171 |
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the end of the buffer. Padding might be appropriate. If only chunks |
172 |
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of 4bytes are applicable, define XVID_SAFE_BS_TAIL. Note that this will |
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slow decoding, so consider this as a last-resort solution */ |
174 |
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/* #define XVID_SAFE_BS_TAIL */ |
175 |
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|
176 |
/* initialise bitstream structure */ |
/* initialise bitstream structure */ |
177 |
|
|
178 |
static void __inline |
static void __inline |
274 |
uint32_t tmp; |
uint32_t tmp; |
275 |
|
|
276 |
bs->bufa = bs->bufb; |
bs->bufa = bs->bufb; |
277 |
|
#if defined(XVID_SAFE_BS_TAIL) |
278 |
|
if (bs->tail<(bs->start+((bs->length+3)>>2))) |
279 |
|
#endif |
280 |
|
{ |
281 |
tmp = *((uint32_t *) bs->tail + 2); |
tmp = *((uint32_t *) bs->tail + 2); |
282 |
#ifndef ARCH_IS_BIG_ENDIAN |
#ifndef ARCH_IS_BIG_ENDIAN |
283 |
BSWAP(tmp); |
BSWAP(tmp); |
284 |
#endif |
#endif |
285 |
bs->bufb = tmp; |
bs->bufb = tmp; |
286 |
bs->tail++; |
bs->tail++; |
287 |
|
} |
288 |
|
#if defined(XVID_SAFE_BS_TAIL) |
289 |
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else { |
290 |
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bs->bufb = 0; |
291 |
|
} |
292 |
|
#endif |
293 |
bs->pos -= 32; |
bs->pos -= 32; |
294 |
} |
} |
295 |
} |
} |