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* XVID MPEG-4 VIDEO CODEC |
* XVID MPEG-4 VIDEO CODEC |
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* - Bitstream reader/writer inlined functions and constants- |
* - Bitstream reader/writer inlined functions and constants- |
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* |
* |
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* Copyright (C) 2001-2003 - Peter Ross <pross@xvid.org> |
* Copyright (C) 2001-2003 Peter Ross <pross@xvid.org> |
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* |
* |
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* This file is part of XviD, a free MPEG-4 video encoder/decoder |
* This program is free software ; you can redistribute it and/or modify |
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* |
* it under the terms of the GNU General Public License as published by |
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* XviD is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
* (at your option) any later version. |
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* |
* |
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#define VIDOBJLAY_TYPE_SIMPLE 1 |
#define VIDOBJLAY_TYPE_SIMPLE 1 |
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/*#define VIDOBJLAY_TYPE_SIMPLE_SCALABLE 2 */ |
/*#define VIDOBJLAY_TYPE_SIMPLE_SCALABLE 2 */ |
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#define VIDOBJLAY_TYPE_CORE 3 |
/*#define VIDOBJLAY_TYPE_CORE 3 */ |
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#define VIDOBJLAY_TYPE_MAIN 4 |
/*#define VIDOBJLAY_TYPE_MAIN 4 */ |
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/*#define VIDOBJLAY_TYPE_NBIT 5 */ |
/*#define VIDOBJLAY_TYPE_NBIT 5 */ |
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/*#define VIDOBJLAY_TYPE_ANIM_TEXT 6 */ |
/*#define VIDOBJLAY_TYPE_ANIM_TEXT 6 */ |
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/*#define VIDOBJLAY_TYPE_ANIM_MESH 7 */ |
/*#define VIDOBJLAY_TYPE_ANIM_MESH 7 */ |
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/*#define VIDOBJLAY_TYPE_STILL_SCALABLE 9 */ |
/*#define VIDOBJLAY_TYPE_STILL_SCALABLE 9 */ |
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#define VIDOBJLAY_TYPE_ART_SIMPLE 10 |
#define VIDOBJLAY_TYPE_ART_SIMPLE 10 |
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/*#define VIDOBJLAY_TYPE_CORE_SCALABLE 11 */ |
/*#define VIDOBJLAY_TYPE_CORE_SCALABLE 11 */ |
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#define VIDOBJLAY_TYPE_ACE 12 |
/*#define VIDOBJLAY_TYPE_ACE 12 */ |
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/*#define VIDOBJLAY_TYPE_SIMPLE_FBA 13 */ |
/*#define VIDOBJLAY_TYPE_ADVANCED_SCALABLE_TEXTURE 13 */ |
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/*#define VIDOBJLAY_TYPE_SIMPLE_FBA 14 */ |
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/*#define VIDEOJLAY_TYPE_SIMPLE_STUDIO 15*/ |
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/*#define VIDEOJLAY_TYPE_CORE_STUDIO 16*/ |
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#define VIDOBJLAY_TYPE_ASP 17 |
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/*#define VIDOBJLAY_TYPE_FGS 18*/ |
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/*#define VIDOBJLAY_AR_SQUARE 1 */ |
/*#define VIDOBJLAY_AR_SQUARE 1 */ |
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int BitstreamReadHeaders(Bitstream * bs, |
int BitstreamReadHeaders(Bitstream * bs, |
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DECODER * dec, |
DECODER * dec, |
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uint32_t * rounding, |
uint32_t * rounding, |
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uint32_t * reduced_resolution, |
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uint32_t * quant, |
uint32_t * quant, |
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uint32_t * fcode_forward, |
uint32_t * fcode_forward, |
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uint32_t * fcode_backward, |
uint32_t * fcode_backward, |
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void BitstreamWriteVopHeader(Bitstream * const bs, |
void BitstreamWriteVopHeader(Bitstream * const bs, |
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const MBParam * pParam, |
const MBParam * pParam, |
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const FRAMEINFO * const frame, |
const FRAMEINFO * const frame, |
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int vop_coded); |
int vop_coded, |
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unsigned int quant); |
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void BitstreamWriteUserData(Bitstream * const bs, |
void BitstreamWriteUserData(Bitstream * const bs, |
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uint8_t * data, |
const char *data, |
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const int length); |
const unsigned int length); |
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void |
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BitstreamWriteEndOfSequence(Bitstream * const bs); |
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void |
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BitstreamWriteGroupOfVopHeader(Bitstream * const bs, |
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const MBParam * pParam, |
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uint32_t is_closed_gov); |
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void write_video_packet_header(Bitstream * const bs, |
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const MBParam * pParam, |
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const FRAMEINFO * const frame, |
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int mbnum); |
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/***************************************************************************** |
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* Bitstream |
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****************************************************************************/ |
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/* Input buffer should be readable as full chunks of 8bytes, including |
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the end of the buffer. Padding might be appropriate. If only chunks |
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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 */ |
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/* #define XVID_SAFE_BS_TAIL */ |
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/* initialise bitstream structure */ |
/* initialise bitstream structure */ |
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#endif |
#endif |
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bs->bufb = tmp; |
bs->bufb = tmp; |
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bs->buf = 0; |
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bs->pos = bs->initpos = bitpos*8; |
bs->pos = bs->initpos = bitpos*8; |
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/* preserve the intervening bytes */ |
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if (bs->initpos > 0) |
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bs->buf = bs->bufa & (0xffffffff << (32 - bs->initpos)); |
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else |
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bs->buf = 0; |
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bs->length = length; |
bs->length = length; |
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} |
} |
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#endif |
#endif |
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bs->bufb = tmp; |
bs->bufb = tmp; |
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/* preserve the intervening bytes */ |
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if (bs->initpos > 0) |
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bs->buf = bs->bufa & (0xffffffff << (32 - bs->initpos)); |
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else |
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bs->buf = 0; |
bs->buf = 0; |
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bs->pos = bs->initpos; |
bs->pos = bs->initpos; |
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} |
} |
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uint32_t tmp; |
uint32_t tmp; |
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bs->bufa = bs->bufb; |
bs->bufa = bs->bufb; |
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#if defined(XVID_SAFE_BS_TAIL) |
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if (bs->tail<(bs->start+((bs->length+3)>>2))) |
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#endif |
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{ |
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tmp = *((uint32_t *) bs->tail + 2); |
tmp = *((uint32_t *) bs->tail + 2); |
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#ifndef ARCH_IS_BIG_ENDIAN |
#ifndef ARCH_IS_BIG_ENDIAN |
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BSWAP(tmp); |
BSWAP(tmp); |
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#endif |
#endif |
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bs->bufb = tmp; |
bs->bufb = tmp; |
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bs->tail++; |
bs->tail++; |
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} |
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#if defined(XVID_SAFE_BS_TAIL) |
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else { |
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bs->bufb = 0; |
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} |
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#endif |
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bs->pos -= 32; |
bs->pos -= 32; |
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} |
} |
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} |
} |