#include <stdio.h>#include <stdlib.h>#include "bitstream.h"#include "zigzag.h"#include "../quant/quant_matrix.h"#include "../local_mem.h"#include "../define.h"#include "../vpe_m.h"//int old_time_incre;uint32_t time_increment_resolution;/***************************************************************************** * Functions ****************************************************************************/static int32_t vop_width[8] = {0, 128, 176, 352, 704, 1408, 0, 0};static int32_t vop_height[8] = {0, 96, 144, 288, 576, 1152, 0, 0};static uint32_t __inlinelog2bin(uint32_t value){/* Changed by Chenm001 */	int n = 0;	while (value) {		value >>= 1;		n++;	}	return n;}/*static const uint32_t intra_dc_threshold_table[] = {	32,							// never use	13,	15,	17,	19,	21,	23,	1,};*/voidbs_get_matrix(Bitstream * bs,			  uint8_t * matrix){	int i = 0, j = 0;	int last, value = 0;	do {		last = value;		j++;		if (j == 8) {			j=0;		}		value = BitstreamGetBits(bs, 8);		matrix[scan_tables[0][i++]] = value;	}	while (value != 0 && i < 64);    i--;    /* fix little bug at coeff not full */	while (i < 64) {		matrix[scan_tables[0][i++]] = last;	}}boolbRead_video_packet_header(DECODER * dec,						int *fcode_forward,						int *fcode_backward,						int32_t * mbnum){	int tmp;	int coding_type;	uint32_t * table = (uint32_t *)((uint32_t) dec->pu32BaseAddr + TABLE_OUTPUT_OFF);	tmp = table[0];	// macroblock_number	if (dec->h263==1)		*mbnum = ((tmp  & 0xFFFF) >> 2) * dec->mb_width;	else {		*mbnum = tmp  & 0xFFFF;		//extent bit		if (tmp & BIT24) {			tmp = table[2];			coding_type = tmp & 0xff;			// hardware not support			if (coding_type >= B_VOP)				return -1;			if (coding_type != I_VOP && *fcode_forward)				*fcode_forward = (tmp >> 16) & 0xff;			if (coding_type == B_VOP && *fcode_backward)				*fcode_backward = 0;		}	}	return 0;}/*decode headersreturns coding_type, or -1 if error*/#define VIDOBJ_START_CODE_MASK		0x0000001f#define VIDOBJLAY_START_CODE_MASK	0x0000000f#define VIDO_SHORT_HEADER_MASK 0x000003ff#define VIDO_SHORT_HEADER 0x8000#define VIDO_SHORT_HEADER_END 0x3fintBitstreamReadHeaders(Bitstream * bs,					 DECODER * dec,					 uint32_t * rounding,					 uint32_t * quant,					 uint32_t * fcode_forward,					 uint32_t * fcode_backward,					 uint32_t * intra_dc_threshold_bit){	uint32_t vol_ver_id;	uint32_t coding_type;	uint32_t start_code;	uint32_t time_incr = 0;	int32_t time_increment = 0;	do {		BitstreamByteAlign(bs);		start_code = BitstreamShowBits(bs, 32);#ifndef FPGA		mVpe_Indicator(0x93000000 | (start_code >> 16));		mVpe_Indicator(0x93000000 | (start_code & 0xFFFF));#endif		if (start_code == VISOBJSEQ_START_CODE) {			int profile;			BitstreamSkip(bs, 32);	/* visual_object_sequence_start_code */			profile = BitstreamGetBits(bs, 8);	/* profile_and_level_indication */		} else if (start_code == VISOBJSEQ_STOP_CODE) {			BitstreamSkip(bs, 32);	/* visual_object_sequence_stop_code */		} else if (start_code == VISOBJ_START_CODE) {			BitstreamSkip(bs, 32);	/* visual_object_start_code */			if (BitstreamGetBit(bs))	/* is_visual_object_identified */			{				vol_ver_id = BitstreamGetBits(bs, 4);	/* visual_object_ver_id */				BitstreamSkip(bs, 3);	/* visual_object_priority */			} else {				vol_ver_id = 1;			}			if (BitstreamShowBits(bs, 4) != VISOBJ_TYPE_VIDEO)	/* visual_object_type */			{				return -1;			}			BitstreamSkip(bs, 4);			/* video_signal_type */			if (BitstreamGetBit(bs))	/* video_signal_type */			{				BitstreamSkip(bs, 3);	/* video_format */				BitstreamSkip(bs, 1);	/* video_range */				if (BitstreamGetBit(bs))	/* color_description */				{					BitstreamSkip(bs, 8);	/* color_primaries */					BitstreamSkip(bs, 8);	/* transfer_characteristics */					BitstreamSkip(bs, 8);	/* matrix_coefficients */				}			}		} else if ((start_code & ~VIDOBJ_START_CODE_MASK) == VIDOBJ_START_CODE) {			BitstreamSkip(bs, 32);	/* video_object_start_code */		} else if ((start_code & ~VIDO_SHORT_HEADER_MASK) == VIDO_SHORT_HEADER) {			int temp, pei, psupp = 0;			uint32_t width, height;		// ben add			dec->h263 = 1;			dec->quant_type = 0;			*fcode_forward = 1;			dec->quarterpel = 0;			BitstreamSkip(bs, 22);			BitstreamSkip(bs, 8);			READ_MARKER();			temp = BitstreamGetBit(bs);			//  zero_bit			dec->split_screen_indicator = BitstreamGetBit(bs);			//  split_screen_indicator			dec->document_camera_indicator = BitstreamGetBit(bs);			//  document_camera_indicator			dec->full_picture_freeze_release = BitstreamGetBit(bs);			//  full_picture_freeze_release			dec->source_format = BitstreamGetBits(bs,3);			//  source_format			dec->picture_coding_type = BitstreamGetBit(bs);			//  picture_coding_type			temp = BitstreamGetBits(bs,4);			//  four_reserved_zero_bits			*quant = BitstreamGetBits(bs,5);		//	quant			temp = BitstreamGetBit(bs);			//  zero_bit			do {				pei = BitstreamGetBit(bs);				if (pei == 1)					psupp=BitstreamGetBits(bs,8);			} while (pei == 1);			width = vop_width[dec->source_format];			height = vop_height[dec->source_format];//ben add#if 0			dec->width = width;			dec->height = height;#else			/* for auto set width & height */			if (dec->width == 0)					dec->width = width;			if (dec->height == 0)				dec->height = height;			if (width != dec->width || height != dec->height)				return -1;#endif			return dec->picture_coding_type;		}		else if ((start_code & ~VIDOBJLAY_START_CODE_MASK) == VIDOBJLAY_START_CODE) {			BitstreamSkip(bs, 32);	/* video_object_layer_start_code */			BitstreamSkip(bs, 1);	/* random_accessible_vol */			dec->h263 = 0;			/* video_object_type_indication */			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 */			{				return -1;			}			BitstreamSkip(bs, 8);			if (BitstreamGetBit(bs))	/* is_object_layer_identifier */			{				vol_ver_id = BitstreamGetBits(bs, 4);	/* video_object_layer_verid */				BitstreamSkip(bs, 3);	/* video_object_layer_priority */			} else {				vol_ver_id = 1;			}			if (BitstreamGetBits(bs, 4) == VIDOBJLAY_AR_EXTPAR)	/* aspect_ratio_info */			{				BitstreamSkip(bs, 8);	/* par_width */				BitstreamSkip(bs, 8);	/* par_height */			}			if (BitstreamGetBit(bs))	/* vol_control_parameters */			{				BitstreamSkip(bs, 2);	/* chroma_format */				dec->low_delay = (uint8_t)BitstreamGetBit(bs);	/* low_delay */				if (BitstreamGetBit(bs))	/* vbv_parameters */				{					BitstreamSkip(bs, 15);	/* first_half_bitrate */					READ_MARKER();					BitstreamSkip(bs, 15);	/* latter_half_bitrate */					READ_MARKER();					BitstreamSkip(bs, 15);	/* first_half_vbv_buffer_size */					READ_MARKER();					BitstreamSkip(bs, 3);	/* latter_half_vbv_buffer_size */					BitstreamSkip(bs, 11);	/* first_half_vbv_occupancy */					READ_MARKER();					BitstreamSkip(bs, 15);	/* latter_half_vbv_occupancy */					READ_MARKER();				}			}			dec->shape = BitstreamGetBits(bs, 2);	/* video_object_layer_shape */			if (dec->shape == VIDOBJLAY_SHAPE_GRAYSCALE && vol_ver_id != 1) {				BitstreamSkip(bs, 4);	/* video_object_layer_shape_extension */			}			READ_MARKER();/* *************************** for decode B-frame time *********************** */			time_increment_resolution = BitstreamGetBits(bs, 16);	/* vop_time_increment_resolution *//*			time_increment_resolution--; */			if (time_increment_resolution > 0) {				dec->time_inc_bits = MAX(log2bin(time_increment_resolution-1), 1);
			} else {				/* dec->time_inc_bits = 0; */				/* for "old" xvid compatibility, set time_inc_bits = 1 */				dec->time_inc_bits = 1;			}