--- bitstream.h 2003/04/04 22:12:07 1.16.2.1 +++ bitstream.h 2003/04/04 22:13:35 1.17.2.3 @@ -3,7 +3,7 @@ * XVID MPEG-4 VIDEO CODEC * - Bitstream reader/writer inlined functions and constants- * - * Copyright (C) 2001-2002 - Peter Ross + * Copyright (C) 2001-2003 - Peter Ross * * This file is part of XviD, a free MPEG-4 video encoder/decoder * @@ -21,44 +21,13 @@ * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * - * Under section 8 of the GNU General Public License, the copyright - * holders of XVID explicitly forbid distribution in the following - * countries: - * - * - Japan - * - United States of America - * - * Linking XviD statically or dynamically with other modules is making a - * combined work based on XviD. Thus, the terms and conditions of the - * GNU General Public License cover the whole combination. - * - * As a special exception, the copyright holders of XviD give you - * permission to link XviD with independent modules that communicate with - * XviD solely through the VFW1.1 and DShow interfaces, regardless of the - * license terms of these independent modules, and to copy and distribute - * the resulting combined work under terms of your choice, provided that - * every copy of the combined work is accompanied by a complete copy of - * the source code of XviD (the version of XviD used to produce the - * combined work), being distributed under the terms of the GNU General - * Public License plus this exception. An independent module is a module - * which is not derived from or based on XviD. - * - * Note that people who make modified versions of XviD are not obligated - * to grant this special exception for their modified versions; it is - * their choice whether to do so. The GNU General Public License gives - * permission to release a modified version without this exception; this - * exception also makes it possible to release a modified version which - * carries forward this exception. - * - * $Id: bitstream.h,v 1.16.2.1 2003/04/04 22:12:07 edgomez Exp $ + * $Id: bitstream.h,v 1.17.2.3 2003/04/04 22:13:35 edgomez Exp $ * ****************************************************************************/ #ifndef _BITSTREAM_H_ #define _BITSTREAM_H_ -#include - #include "../portab.h" #include "../decoder.h" #include "../encoder.h" @@ -78,8 +47,8 @@ #define GRPOFVOP_START_CODE 0x000001b3 /*#define VIDSESERR_ERROR_CODE 0x000001b4 */ #define VISOBJ_START_CODE 0x000001b5 -/*#define SLICE_START_CODE 0x000001b7 */ -/*#define EXT_START_CODE 0x000001b8 */ +#define VOP_START_CODE 0x000001b6 +/*#define STUFFING_START_CODE 0x000001c3 */ #define VISOBJ_TYPE_VIDEO 1 @@ -93,6 +62,16 @@ /*#define VIDOBJLAY_TYPE_SIMPLE_SCALABLE 2 */ #define VIDOBJLAY_TYPE_CORE 3 #define VIDOBJLAY_TYPE_MAIN 4 +/*#define VIDOBJLAY_TYPE_NBIT 5 */ +/*#define VIDOBJLAY_TYPE_ANIM_TEXT 6 */ +/*#define VIDOBJLAY_TYPE_ANIM_MESH 7 */ +/*#define VIDOBJLAY_TYPE_SIMPLE_FACE 8 */ +/*#define VIDOBJLAY_TYPE_STILL_SCALABLE 9 */ +#define VIDOBJLAY_TYPE_ART_SIMPLE 10 +/*#define VIDOBJLAY_TYPE_CORE_SCALABLE 11 */ +#define VIDOBJLAY_TYPE_ACE 12 +/*#define VIDOBJLAY_TYPE_SIMPLE_FBA 13 */ +#define VIDOBJLAY_TYPE_ASP 17 /*#define VIDOBJLAY_AR_SQUARE 1 */ @@ -108,9 +87,12 @@ #define VIDOBJLAY_SHAPE_BINARY_ONLY 2 #define VIDOBJLAY_SHAPE_GRAYSCALE 3 -#define VO_START_CODE 0x8 -#define VOL_START_CODE 0x12 -#define VOP_START_CODE 0x1b6 + +#define SPRITE_NONE 0 +#define SPRITE_STATIC 1 +#define SPRITE_GMC 2 + + #define READ_MARKER() BitstreamSkip(bs, 1) #define WRITE_MARKER() BitstreamPutBit(bs, 1) @@ -132,32 +114,37 @@ * Prototypes ****************************************************************************/ -int -read_video_packet_header(Bitstream *bs, const int addbits, int * quant); - +int read_video_packet_header(Bitstream *bs, + DECODER * dec, + const int addbits, + int *quant, + int *fcode_forward, + int *fcode_backward, + int *intra_dc_threshold); /* header stuff */ int BitstreamReadHeaders(Bitstream * bs, DECODER * dec, uint32_t * rounding, + uint32_t * reduced_resolution, uint32_t * quant, uint32_t * fcode_forward, uint32_t * fcode_backward, - uint32_t * intra_dc_threshold); + uint32_t * intra_dc_threshold, + WARPPOINTS * gmc_warp); void BitstreamWriteVolHeader(Bitstream * const bs, - const MBParam * pParam, - const FRAMEINFO * frame); + const MBParam * pParam); void BitstreamWriteVopHeader(Bitstream * const bs, const MBParam * pParam, - const FRAMEINFO * frame, + const FRAMEINFO * const frame, int vop_coded); -/***************************************************************************** - * Inlined functions - ****************************************************************************/ +void BitstreamWriteUserData(Bitstream * const bs, + uint8_t * data, + const int length); /* initialise bitstream structure */ @@ -242,7 +229,7 @@ /* skip n bits forward in bitstream */ -static void __inline +static __inline void BitstreamSkip(Bitstream * const bs, const uint32_t bits) { @@ -264,7 +251,7 @@ /* number of bits to next byte alignment */ -static uint32_t __inline +static __inline uint32_t BitstreamNumBitsToByteAlign(Bitstream *bs) { uint32_t n = (32 - bs->pos) % 8; @@ -273,7 +260,7 @@ /* show nbits from next byte alignment */ -static uint32_t __inline +static __inline uint32_t BitstreamShowBitsFromByteAlign(Bitstream *bs, int bits) { int bspos = bs->pos + BitstreamNumBitsToByteAlign(bs); @@ -295,7 +282,7 @@ /* move forward to the next byte boundary */ -static void __inline +static __inline void BitstreamByteAlign(Bitstream * const bs) { uint32_t remainder = bs->pos % 8; @@ -315,8 +302,9 @@ } -/* flush the bitstream & return length (unit bytes) - NOTE: assumes no futher bitstream functions will be called. +/* + * flush the bitstream & return length (unit bytes) + * NOTE: assumes no futher bitstream functions will be called. */ static uint32_t __inline @@ -363,20 +351,6 @@ } } - -/* pad bitstream to the next byte boundary */ - -static void __inline -BitstreamPad(Bitstream * const bs) -{ - uint32_t remainder = bs->pos % 8; - - if (remainder) { - BitstreamForward(bs, 8 - remainder); - } -} - - /* read n bits from bitstream */ static uint32_t __inline @@ -439,4 +413,40 @@ } } +static const int stuffing_codes[8] = +{ + /* nbits stuffing code */ + 0, /* 1 0 */ + 1, /* 2 01 */ + 3, /* 3 011 */ + 7, /* 4 0111 */ + 0xf, /* 5 01111 */ + 0x1f, /* 6 011111 */ + 0x3f, /* 7 0111111 */ + 0x7f, /* 8 01111111 */ +}; + +/* pad bitstream to the next byte boundary */ + +static void __inline +BitstreamPad(Bitstream * const bs) +{ + int bits = 8 - (bs->pos % 8); + if (bits < 8) + BitstreamPutBits(bs, stuffing_codes[bits - 1], bits); +} + + +/* + * pad bitstream to the next byte boundary + * alway pad: even if currently at the byte boundary + */ + +static void __inline +BitstreamPadAlways(Bitstream * const bs) +{ + int bits = 8 - (bs->pos % 8); + BitstreamPutBits(bs, stuffing_codes[bits - 1], bits); +} + #endif /* _BITSTREAM_H_ */