/*!
************************************************************************
* \brief
* Interpret the Pan scan rectangle SEI message
* \param payload
* a pointer that point to the sei payload
* \param size
* the size of the sei message
* \param img
* the image pointer
*
************************************************************************
*/
void interpret_pan_scan_rect_info( byte* payload, int size, ImageParameters *img )
{
int pan_scan_rect_id, pan_scan_rect_left_offset, pan_scan_rect_right_offset;
int pan_scan_rect_top_offset, pan_scan_rect_bottom_offset;
Bitstream* buf;
buf = malloc(sizeof(Bitstream));
buf->bitstream_length = size;
buf->streamBuffer = payload;
buf->frame_bitoffset = 0;
UsedBits = 0;
pan_scan_rect_id = ue_v("SEI: pan_scan_rect_id", buf);
pan_scan_rect_left_offset = se_v("SEI: pan_scan_rect_left_offset" , buf);
pan_scan_rect_right_offset = se_v("SEI: pan_scan_rect_right_offset" , buf);
pan_scan_rect_top_offset = se_v("SEI: pan_scan_rect_top_offset" , buf);
pan_scan_rect_bottom_offset = se_v("SEI: pan_scan_rect_bottom_offset", buf);
#ifdef PRINT_PAN_SCAN_RECT
printf("Pan scan rectangle SEI message\n");
printf("pan_scan_rect_id = %d\n", pan_scan_rect_id);
printf("pan_scan_rect_left_offset = %d\n", pan_scan_rect_left_offset);
printf("pan_scan_rect_right_offset = %d\n", pan_scan_rect_right_offset);
printf("pan_scan_rect_top_offset = %d\n", pan_scan_rect_top_offset);
printf("pan_scan_rect_bottom_offset = %d\n", pan_scan_rect_bottom_offset);
#endif
free (buf);
#ifdef PRINT_PAN_SCAN_RECT
#undef PRINT_PAN_SCAN_RECT
#endif
}
/*!
********************************************************************************************
* \brief
* Write a slice header
********************************************************************************************
*/
int SliceHeader(int first_mb_in_slice)
{
//ue_v(img.current_mb_nr);
ue_v(first_mb_in_slice);
ue_v(get_picture_type ());
ue_v(0);
//assert (img.frame_num < 1<<(LOG2_MAX_FRAME_NUM_MINUS4+4)); // check that it fits
u_v (LOG2_MAX_FRAME_NUM_MINUS4 + 4, img.frame_num);
//added by eskim as what jjs said for another decoder to decode result stream, such as JM11 and GOM player
if(img.number == 0)
ue_v (0);
img.pic_order_cnt_lsb = (img.framepoc & 0xff);
u_v (LOG2_MAX_PIC_ORDER_CNT_LSB_MINUS4+4, img.pic_order_cnt_lsb);
// ist there any sense in the following assignments ???
if (img.type == P_SLICE)
{
// num_ref_idx_active_override_flag here always 1
u_1 (1);
ue_v (img.num_ref_idx_l0_active-1);
}
ref_pic_list_reordering();
if (img.nal_reference_idc)
dec_ref_pic_marking();
// we transmit zero in the pps, so here the real QP
se_v((img.qp - 26));
if (input.LFSendParameters)
{
ue_v(input.LFDisableIdc); // Turn loop filter on/off on slice basis
if (input.LFDisableIdc!=1)
{
se_v (input.LFAlphaC0Offset / 2);
se_v (input.LFBetaOffset / 2);
}
}
//MSG(SLICE_HEADER);
return 0;
}
/* update video->mb_skip_run */
AVCDec_Status DecodeMB(AVCDecObject *decvid)
{
AVCDec_Status status;
AVCCommonObj *video = decvid->common;
AVCDecBitstream *stream = decvid->bitstream;
AVCMacroblock *currMB = video->currMB;
uint mb_type;
int slice_type = video->slice_type;
int temp;
currMB->QPy = video->QPy;
currMB->QPc = video->QPc;
if (slice_type == AVC_P_SLICE)
{
if (video->mb_skip_run < 0)
{
ue_v(stream, (uint *)&(video->mb_skip_run));
}
if (video->mb_skip_run == 0)
{
/* this will not handle the case where the slice ends with a mb_skip_run == 0 and no following MB data */
ue_v(stream, &mb_type);
if (mb_type > 30)
{
return AVCDEC_FAIL;
}
InterpretMBModeP(currMB, mb_type);
video->mb_skip_run = -1;
}
else
{
/* see subclause 7.4.4 for more details on how
mb_field_decoding_flag is derived in case of skipped MB */
currMB->mb_intra = FALSE;
currMB->mbMode = AVC_SKIP;
currMB->MbPartWidth = currMB->MbPartHeight = 16;
currMB->NumMbPart = 1;
currMB->NumSubMbPart[0] = currMB->NumSubMbPart[1] =
currMB->NumSubMbPart[2] = currMB->NumSubMbPart[3] = 1; //
currMB->SubMbPartWidth[0] = currMB->SubMbPartWidth[1] =
currMB->SubMbPartWidth[2] = currMB->SubMbPartWidth[3] = currMB->MbPartWidth;
currMB->SubMbPartHeight[0] = currMB->SubMbPartHeight[1] =
currMB->SubMbPartHeight[2] = currMB->SubMbPartHeight[3] = currMB->MbPartHeight;
oscl_memset(currMB->nz_coeff, 0, sizeof(uint8)*NUM_BLKS_IN_MB);
currMB->CBP = 0;
video->cbp4x4 = 0;
/* for skipped MB, always look at the first entry in RefPicList */
currMB->RefIdx[0] = currMB->RefIdx[1] =
currMB->RefIdx[2] = currMB->RefIdx[3] = video->RefPicList0[0]->RefIdx;
InterMBPrediction(video);
video->mb_skip_run--;
return AVCDEC_SUCCESS;
}
}
else
{
/* Then decode mode and MV */
ue_v(stream, &mb_type);
if (mb_type > 25)
{
return AVCDEC_FAIL;
}
InterpretMBModeI(currMB, mb_type);
}
if (currMB->mbMode != AVC_I_PCM)
{
if (currMB->mbMode == AVC_P8 || currMB->mbMode == AVC_P8ref0)
{
status = sub_mb_pred(video, currMB, stream);
}
else
{
status = mb_pred(video, currMB, stream) ;
}
if (status != AVCDEC_SUCCESS)
{
return status;
}
if (currMB->mbMode != AVC_I16)
{
/* decode coded_block_pattern */
status = DecodeCBP(currMB, stream);
if (status != AVCDEC_SUCCESS)
{
return status;
}
}
if (currMB->CBP > 0 || currMB->mbMode == AVC_I16)
{
se_v(stream, &temp);
if (temp)
{
temp += (video->QPy + 52);
currMB->QPy = video->QPy = temp - 52 * (temp * 79 >> 12);
if (currMB->QPy > 51 || currMB->QPy < 0)
{
video->QPy = AVC_CLIP3(0, 51, video->QPy);
// return AVCDEC_FAIL;
}
video->QPy_div_6 = (video->QPy * 43) >> 8;
video->QPy_mod_6 = video->QPy - 6 * video->QPy_div_6;
currMB->QPc = video->QPc = mapQPi2QPc[AVC_CLIP3(0, 51, video->QPy + video->currPicParams->chroma_qp_index_offset)];
video->QPc_div_6 = (video->QPc * 43) >> 8;
video->QPc_mod_6 = video->QPc - 6 * video->QPc_div_6;
}
}
/* decode residue and inverse transform */
status = residual(decvid, currMB);
if (status != AVCDEC_SUCCESS)
{
return status;
}
}
/*!
************************************************************************
* \brief
* read the weighted prediction tables
************************************************************************
*/
static void pred_weight_table(Slice *currSlice)
{
VideoParameters *p_Vid = currSlice->p_Vid;
seq_parameter_set_rbsp_t *active_sps = p_Vid->active_sps;
byte dP_nr = assignSE2partition[currSlice->dp_mode][SE_HEADER];
DataPartition *partition = &(currSlice->partArr[dP_nr]);
Bitstream *currStream = partition->bitstream;
int luma_weight_flag_l0, luma_weight_flag_l1, chroma_weight_flag_l0, chroma_weight_flag_l1;
int i,j;
currSlice->luma_log2_weight_denom = (unsigned short) ue_v ("SH: luma_log2_weight_denom", currStream);
currSlice->wp_round_luma = currSlice->luma_log2_weight_denom ? 1<<(currSlice->luma_log2_weight_denom - 1): 0;
if ( 0 != active_sps->chroma_format_idc)
{
currSlice->chroma_log2_weight_denom = (unsigned short) ue_v ("SH: chroma_log2_weight_denom", currStream);
currSlice->wp_round_chroma = currSlice->chroma_log2_weight_denom ? 1<<(currSlice->chroma_log2_weight_denom - 1): 0;
}
reset_wp_params(currSlice);
for (i=0; i<currSlice->num_ref_idx_active[LIST_0]; i++)
{
luma_weight_flag_l0 = u_1("SH: luma_weight_flag_l0", currStream);
if (luma_weight_flag_l0)
{
currSlice->wp_weight[0][i][0] = se_v ("SH: luma_weight_l0", currStream);
currSlice->wp_offset[0][i][0] = se_v ("SH: luma_offset_l0", currStream);
currSlice->wp_offset[0][i][0] = currSlice->wp_offset[0][i][0]<<(p_Vid->bitdepth_luma - 8);
}
else
{
currSlice->wp_weight[0][i][0] = 1 << currSlice->luma_log2_weight_denom;
currSlice->wp_offset[0][i][0] = 0;
}
if (active_sps->chroma_format_idc != 0)
{
chroma_weight_flag_l0 = u_1 ("SH: chroma_weight_flag_l0", currStream);
for (j=1; j<3; j++)
{
if (chroma_weight_flag_l0)
{
currSlice->wp_weight[0][i][j] = se_v("SH: chroma_weight_l0", currStream);
currSlice->wp_offset[0][i][j] = se_v("SH: chroma_offset_l0", currStream);
currSlice->wp_offset[0][i][j] = currSlice->wp_offset[0][i][j]<<(p_Vid->bitdepth_chroma-8);
}
else
{
currSlice->wp_weight[0][i][j] = 1<<currSlice->chroma_log2_weight_denom;
currSlice->wp_offset[0][i][j] = 0;
}
}
}
}
if ((p_Vid->type == B_SLICE) && p_Vid->active_pps->weighted_bipred_idc == 1)
{
for (i=0; i<currSlice->num_ref_idx_active[LIST_1]; i++)
{
luma_weight_flag_l1 = u_1("SH: luma_weight_flag_l1", currStream);
if (luma_weight_flag_l1)
{
currSlice->wp_weight[1][i][0] = se_v ("SH: luma_weight_l1", currStream);
currSlice->wp_offset[1][i][0] = se_v ("SH: luma_offset_l1", currStream);
currSlice->wp_offset[1][i][0] = currSlice->wp_offset[1][i][0]<<(p_Vid->bitdepth_luma-8);
}
else
{
currSlice->wp_weight[1][i][0] = 1<<currSlice->luma_log2_weight_denom;
currSlice->wp_offset[1][i][0] = 0;
}
if (active_sps->chroma_format_idc != 0)
{
chroma_weight_flag_l1 = u_1 ("SH: chroma_weight_flag_l1", currStream);
for (j=1; j<3; j++)
{
if (chroma_weight_flag_l1)
{
currSlice->wp_weight[1][i][j] = se_v("SH: chroma_weight_l1", currStream);
currSlice->wp_offset[1][i][j] = se_v("SH: chroma_offset_l1", currStream);
currSlice->wp_offset[1][i][j] = currSlice->wp_offset[1][i][j]<<(p_Vid->bitdepth_chroma-8);
}
else
{
currSlice->wp_weight[1][i][j] = 1<<currSlice->chroma_log2_weight_denom;
currSlice->wp_offset[1][i][j] = 0;
}
}
}
}
}
}
/*!
************************************************************************
* \brief
* read the scond part of the header (without the pic_parameter_set_id
* \return
* Length of the second part of the Slice header in bits
************************************************************************
*/
int RestOfSliceHeader(Slice *currSlice)
{
VideoParameters *p_Vid = currSlice->p_Vid;
InputParameters *p_Inp = currSlice->p_Inp;
seq_parameter_set_rbsp_t *active_sps = p_Vid->active_sps;
byte dP_nr = assignSE2partition[currSlice->dp_mode][SE_HEADER];
DataPartition *partition = &(currSlice->partArr[dP_nr]);
Bitstream *currStream = partition->bitstream;
int val, len;
currSlice->frame_num = u_v (active_sps->log2_max_frame_num_minus4 + 4, "SH: frame_num", currStream);
/* Tian Dong: frame_num gap processing, if found */
if(currSlice->idr_flag) //if (p_Vid->idr_flag)
{
p_Vid->pre_frame_num = currSlice->frame_num;
// picture error concealment
p_Vid->last_ref_pic_poc = 0;
assert(currSlice->frame_num == 0);
}
if (active_sps->frame_mbs_only_flag)
{
p_Vid->structure = FRAME;
currSlice->field_pic_flag=0;
}
else
{
// field_pic_flag u(1)
currSlice->field_pic_flag = u_1("SH: field_pic_flag", currStream);
if (currSlice->field_pic_flag)
{
// bottom_field_flag u(1)
currSlice->bottom_field_flag = (byte) u_1("SH: bottom_field_flag", currStream);
p_Vid->structure = currSlice->bottom_field_flag ? BOTTOM_FIELD : TOP_FIELD;
}
else
{
p_Vid->structure = FRAME;
currSlice->bottom_field_flag = FALSE;
}
}
currSlice->structure = (PictureStructure) p_Vid->structure;
currSlice->mb_aff_frame_flag = (active_sps->mb_adaptive_frame_field_flag && (currSlice->field_pic_flag==0));
//currSlice->mb_aff_frame_flag = p_Vid->mb_aff_frame_flag;
if (p_Vid->structure == FRAME )
assert (currSlice->field_pic_flag == 0);
if (p_Vid->structure == TOP_FIELD )
assert (currSlice->field_pic_flag == 1 && (currSlice->bottom_field_flag == FALSE));
if (p_Vid->structure == BOTTOM_FIELD)
assert (currSlice->field_pic_flag == 1 && (currSlice->bottom_field_flag == TRUE ));
if (currSlice->idr_flag)
{
currSlice->idr_pic_id = ue_v("SH: idr_pic_id", currStream);
}
if (active_sps->pic_order_cnt_type == 0)
{
currSlice->pic_order_cnt_lsb = u_v(active_sps->log2_max_pic_order_cnt_lsb_minus4 + 4, "SH: pic_order_cnt_lsb", currStream);
if( p_Vid->active_pps->bottom_field_pic_order_in_frame_present_flag == 1 && !currSlice->field_pic_flag )
currSlice->delta_pic_order_cnt_bottom = se_v("SH: delta_pic_order_cnt_bottom", currStream);
else
currSlice->delta_pic_order_cnt_bottom = 0;
}
if( active_sps->pic_order_cnt_type == 1)
{
if ( !active_sps->delta_pic_order_always_zero_flag )
{
currSlice->delta_pic_order_cnt[ 0 ] = se_v("SH: delta_pic_order_cnt[0]", currStream);
if( p_Vid->active_pps->bottom_field_pic_order_in_frame_present_flag == 1 && !currSlice->field_pic_flag )
currSlice->delta_pic_order_cnt[ 1 ] = se_v("SH: delta_pic_order_cnt[1]", currStream);
else
currSlice->delta_pic_order_cnt[ 1 ] = 0; // set to zero if not in stream
}
else
{
currSlice->delta_pic_order_cnt[ 0 ] = 0;
currSlice->delta_pic_order_cnt[ 1 ] = 0;
}
}
//! redundant_pic_cnt is missing here
if (p_Vid->active_pps->redundant_pic_cnt_present_flag)
{
currSlice->redundant_pic_cnt = ue_v ("SH: redundant_pic_cnt", currStream);
}
if(currSlice->slice_type == B_SLICE)
{
currSlice->direct_spatial_mv_pred_flag = u_1 ("SH: direct_spatial_mv_pred_flag", currStream);
}
currSlice->num_ref_idx_active[LIST_0] = p_Vid->active_pps->num_ref_idx_l0_active_minus1 + 1;
currSlice->num_ref_idx_active[LIST_1] = p_Vid->active_pps->num_ref_idx_l1_active_minus1 + 1;
if(p_Vid->type==P_SLICE || p_Vid->type == SP_SLICE || p_Vid->type==B_SLICE)
{
val = u_1 ("SH: num_ref_idx_override_flag", currStream);
if (val)
{
currSlice->num_ref_idx_active[LIST_0] = 1 + ue_v ("SH: num_ref_idx_l0_active_minus1", currStream);
if(p_Vid->type==B_SLICE)
{
currSlice->num_ref_idx_active[LIST_1] = 1 + ue_v ("SH: num_ref_idx_l1_active_minus1", currStream);
}
}
}
if (currSlice->slice_type!=B_SLICE)
{
currSlice->num_ref_idx_active[LIST_1] = 0;
}
#if (MVC_EXTENSION_ENABLE)
if (currSlice->svc_extension_flag == 0 || currSlice->svc_extension_flag == 1)
ref_pic_list_mvc_modification(currSlice);
else
ref_pic_list_reordering(currSlice);
#else
ref_pic_list_reordering(currSlice);
#endif
currSlice->weighted_pred_flag = (unsigned short) ((currSlice->slice_type == P_SLICE || currSlice->slice_type == SP_SLICE)
? p_Vid->active_pps->weighted_pred_flag
: (currSlice->slice_type == B_SLICE && p_Vid->active_pps->weighted_bipred_idc == 1));
currSlice->weighted_bipred_idc = (unsigned short) (currSlice->slice_type == B_SLICE && p_Vid->active_pps->weighted_bipred_idc > 0);
if ((p_Vid->active_pps->weighted_pred_flag&&(p_Vid->type==P_SLICE|| p_Vid->type == SP_SLICE))||
(p_Vid->active_pps->weighted_bipred_idc==1 && (p_Vid->type==B_SLICE)))
{
pred_weight_table(currSlice);
}
if (currSlice->nal_reference_idc)
dec_ref_pic_marking(p_Vid, currStream, currSlice);
if (p_Vid->active_pps->entropy_coding_mode_flag && p_Vid->type!=I_SLICE && p_Vid->type!=SI_SLICE)
{
currSlice->model_number = ue_v("SH: cabac_init_idc", currStream);
}
else
{
currSlice->model_number = 0;
}
currSlice->slice_qp_delta = val = se_v("SH: slice_qp_delta", currStream);
//currSlice->qp = p_Vid->qp = 26 + p_Vid->active_pps->pic_init_qp_minus26 + val;
currSlice->qp = 26 + p_Vid->active_pps->pic_init_qp_minus26 + val;
if ((currSlice->qp < -p_Vid->bitdepth_luma_qp_scale) || (currSlice->qp > 51))
error ("slice_qp_delta makes slice_qp_y out of range", 500);
if(p_Vid->type==SP_SLICE || p_Vid->type == SI_SLICE)
{
if(p_Vid->type==SP_SLICE)
{
currSlice->sp_switch = u_1 ("SH: sp_for_switch_flag", currStream);
}
currSlice->slice_qs_delta = val = se_v("SH: slice_qs_delta", currStream);
currSlice->qs = 26 + p_Vid->active_pps->pic_init_qs_minus26 + val;
if ((currSlice->qs < 0) || (currSlice->qs > 51))
error ("slice_qs_delta makes slice_qs_y out of range", 500);
}
if ( !HI_INTRA_ONLY_PROFILE || (HI_INTRA_ONLY_PROFILE && (p_Inp->intra_profile_deblocking == 1) ))
//then read flags and parameters from bistream
{
if (p_Vid->active_pps->deblocking_filter_control_present_flag)
{
currSlice->DFDisableIdc = (short) ue_v ("SH: disable_deblocking_filter_idc", currStream);
if (currSlice->DFDisableIdc!=1)
{
currSlice->DFAlphaC0Offset = (short) (2 * se_v("SH: slice_alpha_c0_offset_div2", currStream));
currSlice->DFBetaOffset = (short) (2 * se_v("SH: slice_beta_offset_div2", currStream));
}
else
{
currSlice->DFAlphaC0Offset = currSlice->DFBetaOffset = 0;
}
}
else
{
currSlice->DFDisableIdc = currSlice->DFAlphaC0Offset = currSlice->DFBetaOffset = 0;
}
}
else //By default the Loop Filter is Off
{ //444_TEMP_NOTE: change made below. 08/07/07
//still need to parse the SEs (read flags and parameters from bistream) but will ignore
if (p_Vid->active_pps->deblocking_filter_control_present_flag)
{
currSlice->DFDisableIdc = (short) ue_v ("SH: disable_deblocking_filter_idc", currStream);
if (currSlice->DFDisableIdc!=1)
{
currSlice->DFAlphaC0Offset = (short) (2 * se_v("SH: slice_alpha_c0_offset_div2", currStream));
currSlice->DFBetaOffset = (short) (2 * se_v("SH: slice_beta_offset_div2", currStream));
}
}//444_TEMP_NOTE. the end of change. 08/07/07
//Ignore the SEs, by default the Loop Filter is Off
currSlice->DFDisableIdc =1;
currSlice->DFAlphaC0Offset = currSlice->DFBetaOffset = 0;
}
if (p_Vid->active_pps->num_slice_groups_minus1>0 && p_Vid->active_pps->slice_group_map_type>=3 &&
p_Vid->active_pps->slice_group_map_type<=5)
{
len = (active_sps->pic_height_in_map_units_minus1+1)*(active_sps->pic_width_in_mbs_minus1+1)/
(p_Vid->active_pps->slice_group_change_rate_minus1+1);
if (((active_sps->pic_height_in_map_units_minus1+1)*(active_sps->pic_width_in_mbs_minus1+1))%
(p_Vid->active_pps->slice_group_change_rate_minus1+1))
len +=1;
len = CeilLog2(len+1);
currSlice->slice_group_change_cycle = u_v (len, "SH: slice_group_change_cycle", currStream);
}
p_Vid->PicHeightInMbs = p_Vid->FrameHeightInMbs / ( 1 + currSlice->field_pic_flag );
p_Vid->PicSizeInMbs = p_Vid->PicWidthInMbs * p_Vid->PicHeightInMbs;
p_Vid->FrameSizeInMbs = p_Vid->PicWidthInMbs * p_Vid->FrameHeightInMbs;
return p_Dec->UsedBits;
}
//++ 参见标准7.3.2.2、7.4.2.2节
int GeneratePic_parameter_set_rbsp (pic_parameter_set_rbsp_t *pps, char *rbsp)
{
DataPartition *partition;
int len = 0, LenInBytes;
unsigned i;
unsigned NumberBitsPerSliceGroupId;
assert (rbsp != NULL);
// In order to use the entropy coding functions from golomb.c we need
// to allocate a partition structure. It will be freed later in this
// function
if ((partition=calloc(1,sizeof(DataPartition)))==NULL) no_mem_exit("PicParameterSet:partition");
if ((partition->bitstream=calloc(1, sizeof(Bitstream)))==NULL) no_mem_exit("PicParameterSet:bitstream");
// .. and use the rbsp provided (or allocated above) for the data
partition->bitstream->streamBuffer = rbsp;
partition->bitstream->bits_to_go = 8;
//sw paff
pps->pic_order_present_flag = img->pic_order_present_flag;
len+=ue_v ("PPS: pic_parameter_set_id", pps->pic_parameter_set_id, partition);
len+=ue_v ("PPS: seq_parameter_set_id", pps->seq_parameter_set_id, partition);
len+=u_1 ("PPS: entropy_coding_mode_flag", pps->entropy_coding_mode_flag, partition);
len+=u_1 ("PPS: pic_order_present_flag", pps->pic_order_present_flag, partition);
len+=ue_v ("PPS: num_slice_groups_minus1", pps->num_slice_groups_minus1, partition);
// FMO stuff
if(pps->num_slice_groups_minus1 > 0 )
{
len+=ue_v ("PPS: slice_group_map_type", pps->slice_group_map_type, partition);
if (pps->slice_group_map_type == 0)
for (i=0; i<=pps->num_slice_groups_minus1; i++)
len+=ue_v ("PPS: run_length_minus1[i]", pps->run_length_minus1[i], partition);
else if (pps->slice_group_map_type==2)
for (i=0; i<pps->num_slice_groups_minus1; i++)
{
len+=ue_v ("PPS: top_left[i]", pps->top_left[i], partition);
len+=ue_v ("PPS: bottom_right[i]", pps->bottom_right[i], partition);
}
else if (pps->slice_group_map_type == 3 ||
pps->slice_group_map_type == 4 ||
pps->slice_group_map_type == 5)
{
len+=u_1 ("PPS: slice_group_change_direction_flag", pps->slice_group_change_direction_flag, partition);
len+=ue_v ("PPS: slice_group_change_rate_minus1", pps->slice_group_change_rate_minus1, partition);
}
else if (pps->slice_group_map_type == 6)
{
if (pps->num_slice_groups_minus1>=4)
NumberBitsPerSliceGroupId=3;
else if (pps->num_slice_groups_minus1>=2)
NumberBitsPerSliceGroupId=2;
else if (pps->num_slice_groups_minus1>=1)
NumberBitsPerSliceGroupId=1;
else
NumberBitsPerSliceGroupId=0;
len+=ue_v ("PPS: pic_size_in_map_units_minus1", pps->pic_size_in_map_units_minus1, partition);
for(i=0; i<=pps->pic_size_in_map_units_minus1; i++)
len+= u_v (NumberBitsPerSliceGroupId, "PPS: >slice_group_id[i]", pps->slice_group_id[i], partition);
}
}
// End of FMO stuff
len+=ue_v ("PPS: num_ref_idx_l0_active_minus1", pps->num_ref_idx_l0_active_minus1, partition);
len+=ue_v ("PPS: num_ref_idx_l1_active_minus1", pps->num_ref_idx_l1_active_minus1, partition);
len+=u_1 ("PPS: weighted_pred_flag", pps->weighted_pred_flag, partition);
len+=u_v (2, "PPS: weighted_bipred_idc", pps->weighted_bipred_idc, partition);
len+=se_v ("PPS: pic_init_qp_minus26", pps->pic_init_qp_minus26, partition);
len+=se_v ("PPS: pic_init_qs_minus26", pps->pic_init_qs_minus26, partition);
len+=se_v ("PPS: chroma_qp_index_offset", pps->chroma_qp_index_offset, partition);
len+=u_1 ("PPS: deblocking_filter_control_present_flag", pps->deblocking_filter_control_present_flag, partition);
len+=u_1 ("PPS: constrained_intra_pred_flag", pps->constrained_intra_pred_flag, partition);
len+=u_1 ("PPS: redundant_pic_cnt_present_flag", pps->redundant_pic_cnt_present_flag, partition);
SODBtoRBSP(partition->bitstream); // copies the last couple of bits into the byte buffer
LenInBytes=partition->bitstream->byte_pos;
// Get rid of the helper structures
free (partition->bitstream);
free (partition);
return LenInBytes;
}
//++ 参见标准7.3.2.1、7.4.2.1节
int GenerateSeq_parameter_set_rbsp (seq_parameter_set_rbsp_t *sps, char *rbsp)
{
DataPartition *partition;
int len = 0, LenInBytes;
unsigned i;
assert (rbsp != NULL);
// In order to use the entropy coding functions from golomb.c we need
// to allocate a partition structure. It will be freed later in this
// function
if ((partition=calloc(1,sizeof(DataPartition)))==NULL) no_mem_exit("SeqParameterSet:partition");
if ((partition->bitstream=calloc(1, sizeof(Bitstream)))==NULL) no_mem_exit("SeqParameterSet:bitstream");
// .. and use the rbsp provided (or allocated above) for the data
partition->bitstream->streamBuffer = rbsp;
partition->bitstream->bits_to_go = 8;
len+=u_v (8, "SPS: profile_idc", sps->profile_idc, partition);
len+=u_1 ("SPS: constrained_set0_flag", sps->constrained_set0_flag, partition);
len+=u_1 ("SPS: constrained_set1_flag", sps->constrained_set1_flag, partition);
len+=u_1 ("SPS: constrained_set2_flag", sps->constrained_set2_flag, partition);
len+=u_v (5, "SPS: reserved_zero", 0, partition);
len+=u_v (8, "SPS: level_idc", sps->level_idc, partition);
len+=ue_v ("SPS: seq_parameter_set_id", sps->seq_parameter_set_id, partition);
len+=ue_v ("SPS: log2_max_frame_num_minus4", sps->log2_max_frame_num_minus4, partition);
len+=ue_v ("SPS: pic_order_cnt_type", sps->pic_order_cnt_type, partition);
// POC200301
if (sps->pic_order_cnt_type == 0)
len+=ue_v ("SPS: log2_max_pic_order_cnt_lsb_minus4", sps->log2_max_pic_order_cnt_lsb_minus4, partition);
else if (sps->pic_order_cnt_type == 1)
{
len+=u_1 ("SPS: delta_pic_order_always_zero_flag", sps->delta_pic_order_always_zero_flag, partition);
len+=se_v ("SPS: offset_for_non_ref_pic", sps->offset_for_non_ref_pic, partition);
len+=se_v ("SPS: offset_for_top_to_bottom_field", sps->offset_for_top_to_bottom_field, partition);
len+=ue_v ("SPS: num_ref_frames_in_pic_order_cnt_cycle", sps->num_ref_frames_in_pic_order_cnt_cycle, partition);
for (i=0; i<sps->num_ref_frames_in_pic_order_cnt_cycle; i++)
len+=se_v ("SPS: offset_for_ref_frame", sps->offset_for_ref_frame[i], partition);
}
len+=ue_v ("SPS: num_ref_frames", sps->num_ref_frames, partition);
len+=u_1 ("SPS: gaps_in_frame_num_value_allowed_flag", sps->gaps_in_frame_num_value_allowed_flag, partition);
len+=ue_v ("SPS: pic_width_in_mbs_minus1", sps->pic_width_in_mbs_minus1, partition);
len+=ue_v ("SPS: pic_height_in_map_units_minus1", sps->pic_height_in_map_units_minus1, partition);
len+=u_1 ("SPS: frame_mbs_only_flag", sps->frame_mbs_only_flag, partition);
if (!sps->frame_mbs_only_flag)
{
len+=u_1 ("SPS: mb_adaptive_frame_field_flag", sps->mb_adaptive_frame_field_flag, partition);
}
len+=u_1 ("SPS: direct_8x8_inference_flag", sps->direct_8x8_inference_flag, partition);
len+=u_1 ("SPS: frame_cropping_flag", sps->frame_cropping_flag, partition);
if (sps->frame_cropping_flag)
{
len+=ue_v ("SPS: frame_cropping_rect_left_offset", sps->frame_cropping_rect_left_offset, partition);
len+=ue_v ("SPS: frame_cropping_rect_right_offset", sps->frame_cropping_rect_right_offset, partition);
len+=ue_v ("SPS: frame_cropping_rect_top_offset", sps->frame_cropping_rect_top_offset, partition);
len+=ue_v ("SPS: frame_cropping_rect_bottom_offset", sps->frame_cropping_rect_bottom_offset, partition);
}
len+=u_1 ("SPS: vui_parameters_present_flag", sps->vui_parameters_present_flag, partition);
if (sps->vui_parameters_present_flag)
len+=GenerateVUISequenceParameters(); // currently a dummy, asserting
SODBtoRBSP(partition->bitstream); // copies the last couple of bits into the byte buffer
LenInBytes=partition->bitstream->byte_pos;
free (partition->bitstream);
free (partition);
return LenInBytes;
}
/*
*************************************************************************
* Function:pb picture header
* Input:
* Output:
* Return:
* Attention:
*************************************************************************
*/
void PB_Picture_Header(char *buf,int startcodepos, int length)
{
currStream->frame_bitoffset = currStream->read_len = (startcodepos+1)*8;
currStream->code_len = currStream->bitstream_length = length;
memcpy (currStream->streamBuffer, buf, length);
bbv_delay = u_v(16,"bbv delay");
picture_coding_type = u_v(2,"picture_coding_type");
picture_distance = u_v(8,"picture_distance");
if(low_delay)
{
bbv_check_times = ue_v("bbv check times");
}
progressive_frame = u_v(1,"progressive_frame");
if (!progressive_frame)
{
img->picture_structure = u_v(1,"picture_structure");
if (!img->picture_structure)
img->advanced_pred_mode_disable = u_v(1,"advanced_pred_mode_disable");
}else
img->picture_structure = 1;
top_field_first = u_v(1,"top_field_first");
repeat_first_field = u_v(1,"repeat_first_field");
fixed_picture_qp = u_v(1,"fixed_picture_qp");
picture_qp = u_v(6,"picture_qp");
if (!(picture_coding_type==2 && img->picture_structure==1))
{
picture_reference_flag = u_v(1,"picture_reference_flag");
}
img->no_forward_reference = u_v(1, "no_forward_reference_flag");
u_v(3,"reserved bits");
skip_mode_flag = u_v(1,"skip_mode_flag");
loop_filter_disable = u_v(1,"loop_filter_disable");
if (!loop_filter_disable)
{
loop_filter_parameter_flag = u_v(1,"loop_filter_parameter_flag");
if (loop_filter_parameter_flag)
{
alpha_offset = se_v("alpha_offset");
beta_offset = se_v("beta_offset");
}
else // 20071009
{
alpha_offset = 0;
beta_offset = 0;
}
}
img->qp = picture_qp;
if(picture_coding_type==1) {
img->type = P_IMG;
vec_flag = 0;
} else {
img->type = B_IMG;
}
img->pic_distance = picture_distance;
}
void I_Picture_Header(char *buf,int startcodepos, int length)
{
currStream->frame_bitoffset = currStream->read_len = (startcodepos+1)*8;
currStream->code_len = currStream->bitstream_length = length;
memcpy (currStream->streamBuffer, buf, length);
bbv_delay = u_v(16,"bbv delay");
time_code_flag = u_v(1,"time_code_flag");
if (time_code_flag)
time_code =u_v(24,"time_code");
marker_bit =u_v(1,"marker_bit");
picture_distance = u_v(8,"picture_distance");
if(low_delay)
{
bbv_check_times = ue_v("bbv check times");
}
progressive_frame = u_v(1,"progressive_frame");
if (!progressive_frame)
{
img->picture_structure = u_v(1,"picture_structure");
}else
{
img->picture_structure = 1;
}
top_field_first = u_v(1,"top_field_first");
repeat_first_field = u_v(1,"repeat_first_field");
fixed_picture_qp = u_v(1,"fixed_picture_qp");
picture_qp = u_v(6,"picture_qp");
if(progressive_frame==0)
{
if(img->picture_structure == 0)
{
skip_mode_flag =u_v(1,"skip mode flag");
}
}
u_v(4,"reserved bits");
loop_filter_disable = u_v(1,"loop_filter_disable");
if (!loop_filter_disable)
{
loop_filter_parameter_flag = u_v(1,"loop_filter_parameter_flag");
if (loop_filter_parameter_flag)
{
alpha_offset = se_v("alpha_offset");
beta_offset = se_v("beta_offset");
}
else
{
alpha_offset = 0;
beta_offset = 0;
}
}
img->qp = picture_qp;
img->pic_distance = picture_distance;
img->type = I_IMG;
}
static void pred_weight_table( h264_decoder* dec_params)
{
Slice *currSlice = dec_params->img->currentSlice;
DataPartition *partition = &(currSlice->partArr[0]);
Bitstream *currStream = partition->bitstream;
int luma_weight_flag_l0, luma_weight_flag_l1, chroma_weight_flag_l0, chroma_weight_flag_l1;
int i,j;
dec_params->img->luma_log2_weight_denom = ue_v ("SH: luma_log2_weight_denom", currStream,dec_params);
dec_params->img->wp_round_luma = dec_params->img->luma_log2_weight_denom ? 1<<(dec_params->img->luma_log2_weight_denom - 1): 0;
dec_params->img->chroma_log2_weight_denom = ue_v ("SH: chroma_log2_weight_denom", currStream,dec_params);
dec_params->img->wp_round_chroma = dec_params->img->chroma_log2_weight_denom ? 1<<(dec_params->img->chroma_log2_weight_denom - 1): 0;
reset_wp_params(dec_params->img);
for (i=0; i<dec_params->img->num_ref_idx_l0_active; i++)
{
luma_weight_flag_l0 = u_1("SH: luma_weight_flag_l0", currStream,dec_params);
if (luma_weight_flag_l0)
{
dec_params->img->apply_weights_luma = 1;
dec_params->img->wp_weight[0][i][0] = se_v ("SH: luma_weight_l0", currStream,dec_params);
dec_params->img->wp_offset[0][i][0] = se_v ("SH: luma_offset_l0", currStream,dec_params);
}
else
{
dec_params->img->wp_weight[0][i][0] = 1<<dec_params->img->luma_log2_weight_denom;
dec_params->img->wp_offset[0][i][0] = 0;
}
//if (dec_params->active_sps->chroma_format_idc != 0)
{
chroma_weight_flag_l0 = u_1 ("SH: chroma_weight_flag_l0", currStream,dec_params);
for (j=1; j<3; j++)
{
if (chroma_weight_flag_l0)
{
dec_params->img->wp_weight[0][i][j] = se_v("SH: chroma_weight_l0", currStream,dec_params);
dec_params->img->wp_offset[0][i][j] = se_v("SH: chroma_offset_l0", currStream,dec_params);
dec_params->img->apply_weights_chr = 1;
}
else
{
dec_params->img->wp_weight[0][i][j] = 1<<dec_params->img->chroma_log2_weight_denom;
dec_params->img->wp_offset[0][i][j] = 0;
}
}
}
}
if ((dec_params->img->type == B_SLICE) && dec_params->active_pps->weighted_bipred_idc == 1)
{
for (i=0; i<dec_params->img->num_ref_idx_l1_active; i++)
{
luma_weight_flag_l1 = u_1("SH: luma_weight_flag_l1", currStream,dec_params);
if (luma_weight_flag_l1)
{
dec_params->img->wp_weight[1][i][0] = se_v ("SH: luma_weight_l1", currStream,dec_params);
dec_params->img->wp_offset[1][i][0] = se_v ("SH: luma_offset_l1", currStream,dec_params);
dec_params->img->apply_weights_luma =1;
}
else
{
dec_params->img->wp_weight[1][i][0] = 1<<dec_params->img->luma_log2_weight_denom;
dec_params->img->wp_offset[1][i][0] = 0;
}
//if (dec_params->active_sps->chroma_format_idc != 0)
{
chroma_weight_flag_l1 = u_1 ("SH: chroma_weight_flag_l1", currStream,dec_params);
for (j=1; j<3; j++)
{
if (chroma_weight_flag_l1)
{
dec_params->img->wp_weight[1][i][j] = se_v("SH: chroma_weight_l1", currStream,dec_params);
dec_params->img->wp_offset[1][i][j] = se_v("SH: chroma_offset_l1", currStream,dec_params);
dec_params->img->apply_weights_chr = 1;
}
else
{
dec_params->img->wp_weight[1][i][j] = 1<<dec_params->img->chroma_log2_weight_denom;
dec_params->img->wp_offset[1][i][j] = 0;
}
}
}
}
}
}
/***********************************************************************
*\brief Header_parsing
* - Code not related to baseline removed.
*
* "Muhammad Tahir Awan" <*****@*****.**>,
* "Umair Razzak" <*****@*****.**>
****************************
* Changes till 21-11-2005
***********************************************************************
*/
int RestOfSliceHeader_baseline( h264_decoder* dec_params )
{
Slice *currSlice = dec_params->img->currentSlice;
//int dP_nr = assignSE2partition[PAR_DP_1][SE_HEADER];
//int dP_nr = 0;
DataPartition *partition = &(currSlice->partArr[0]);
Bitstream *currStream = partition->bitstream;
int val, len;
// reading frame number (7.3.3)
dec_params->img->frame_num = u_v (dec_params->active_sps->log2_max_frame_num_minus4 + 4, "SH: frame_num", currStream,dec_params);
/* Tian Dong: frame_num gap processing, if found */
if (dec_params->img->idr_flag)
{
dec_params->img->pre_frame_num = dec_params->img->frame_num;
assert(dec_params->img->frame_num == 0);
}
//{
// dec_params->img->structure = FRAME;
//}
//currSlice->structure = FRAME;
//assert (dec_params->img->field_pic_flag == 0);
if (dec_params->img->idr_flag)
{
dec_params->img->idr_pic_id = ue_v("SH: idr_pic_id", currStream,dec_params);
}
if (dec_params->active_sps->pic_order_cnt_type == 0)
{
dec_params->img->pic_order_cnt_lsb = u_v(dec_params->active_sps->log2_max_pic_order_cnt_lsb_minus4 + 4, "SH: pic_order_cnt_lsb", currStream,dec_params);
if( dec_params->active_pps->pic_order_present_flag == 1)
dec_params->img->delta_pic_order_cnt_bottom = se_v("SH: delta_pic_order_cnt_bottom", currStream,dec_params);
else
dec_params->img->delta_pic_order_cnt_bottom = 0;
}
if( dec_params->active_sps->pic_order_cnt_type == 1 && !dec_params->active_sps->delta_pic_order_always_zero_flag )
{
dec_params->img->delta_pic_order_cnt[ 0 ] = se_v("SH: delta_pic_order_cnt[0]", currStream,dec_params);
if( dec_params->active_pps->pic_order_present_flag == 1 )
dec_params->img->delta_pic_order_cnt[ 1 ] = se_v("SH: delta_pic_order_cnt[1]", currStream,dec_params);
}else
{
if (dec_params->active_sps->pic_order_cnt_type == 1)
{
dec_params->img->delta_pic_order_cnt[ 0 ] = 0;
dec_params->img->delta_pic_order_cnt[ 1 ] = 0;
}
}
//! redundant_pic_cnt is missing here
if (dec_params->active_pps->redundant_pic_cnt_present_flag)
{
//dec_params->img->redundant_pic_cnt = ue_v ("SH: redundant_pic_cnt", currStream,dec_params);
}
if(dec_params->img->type==B_SLICE)
{
dec_params->img->direct_spatial_mv_pred_flag = u_1 ("SH: direct_spatial_mv_pred_flag", currStream,dec_params);
}
dec_params->img->num_ref_idx_l0_active = dec_params->active_pps->num_ref_idx_l0_active_minus1 + 1;
dec_params->img->num_ref_idx_l1_active = dec_params->active_pps->num_ref_idx_l1_active_minus1 + 1;
if(dec_params->img->type==P_SLICE || dec_params->img->type==B_SLICE)// added by Faisal Abdullah for B frames
{
val = u_1 ("SH: num_ref_idx_override_flag", currStream,dec_params);
if (val)
{
dec_params->img->num_ref_idx_l0_active = 1 + ue_v ("SH: num_ref_idx_l0_active_minus1", currStream,dec_params);
if(dec_params->img->type==B_SLICE)
{
dec_params->img->num_ref_idx_l1_active = 1 + ue_v ("SH: num_ref_idx_l1_active_minus1", currStream,dec_params);
}
}
}
if (dec_params->img->type!=B_SLICE)
{
dec_params->img->num_ref_idx_l1_active = 0;
}
ref_pic_list_reordering( dec_params );
// for weighted prediction in B and P frames
dec_params->img->apply_weights = ((dec_params->active_pps->weighted_pred_flag && (currSlice->picture_type == P_SLICE ) )
|| ((dec_params->active_pps->weighted_bipred_idc > 0 ) && (currSlice->picture_type == B_SLICE)));
/*dec_params->img->apply_weights = ((dec_params->active_pps->weighted_pred_flag && (currSlice->picture_type == P_SLICE ) )
|| ((dec_params->active_pps->weighted_bipred_idc == 1 ) && (currSlice->picture_type == B_SLICE)));*/
dec_params->img->apply_weights_bi = 0;
dec_params->img->apply_weights_luma = 0;
dec_params->img->apply_weights_chr = 0;
if ((dec_params->active_pps->weighted_pred_flag&&(dec_params->img->type==P_SLICE))||
(dec_params->active_pps->weighted_bipred_idc==1 && (dec_params->img->type==B_SLICE)))
{
pred_weight_table(dec_params);
}
dec_params->img->apply_weights_bi = (dec_params->active_pps->weighted_bipred_idc==2 && (dec_params->img->type==B_SLICE));
if (dec_params->img->nal_reference_idc)
dec_ref_pic_marking(currStream,dec_params);
//__CABAC__
if (dec_params->active_pps->entropy_coding_mode_flag && dec_params->img->type!=I_SLICE && dec_params->img->type!=SI_SLICE)
{
dec_params->img->model_number = ue_v("SH: cabac_init_idc", currStream, dec_params);
}
else
{
dec_params->img->model_number = 0;
}
//__CABAC__
val = se_v("SH: slice_qp_delta", currStream,dec_params);
//currSlice->qp = dec_params->img->qp = 26 + dec_params->active_pps->pic_init_qp_minus26 + val;
dec_params->img->qp = 26 + dec_params->active_pps->pic_init_qp_minus26 + val;
//currSlice->slice_qp_delta = val;
if (dec_params->active_pps->deblocking_filter_control_present_flag)
{
currSlice->LFDisableIdc = ue_v ("SH: disable_deblocking_filter_idc", currStream,dec_params);
if (currSlice->LFDisableIdc!=1)
{
currSlice->LFAlphaC0Offset = 2 * se_v("SH: slice_alpha_c0_offset_div2", currStream,dec_params);
currSlice->LFBetaOffset = 2 * se_v("SH: slice_beta_offset_div2", currStream,dec_params);
}
else
{
currSlice->LFAlphaC0Offset = currSlice->LFBetaOffset = 0;
}
}
else
{
currSlice->LFDisableIdc = currSlice->LFAlphaC0Offset = currSlice->LFBetaOffset = 0;
}
if (dec_params->active_pps->num_slice_groups_minus1>0 && dec_params->active_pps->slice_group_map_type>=3 &&
dec_params->active_pps->slice_group_map_type<=5)
{
len = (dec_params->active_sps->pic_height_in_map_units_minus1+1)*(dec_params->active_sps->pic_width_in_mbs_minus1+1)/
(dec_params->active_pps->slice_group_change_rate_minus1+1);
if (((dec_params->active_sps->pic_height_in_map_units_minus1+1)*(dec_params->active_sps->pic_width_in_mbs_minus1+1))%
(dec_params->active_pps->slice_group_change_rate_minus1+1))
len +=1;
len = CeilLog2(len+1);
dec_params->img->slice_group_change_cycle = u_v (len, "SH: slice_group_change_cycle", currStream,dec_params);
}
dec_params->img->FrameSizeInMbs = dec_params->img->FrameWidthInMbs * dec_params->img->FrameHeightInMbs;
return dec_params->UsedBits;
}
/*!
************************************************************************
* \brief
* read the weighted prediction tables
************************************************************************
*/
static void pred_weight_table()
{
Slice *currSlice = img->currentSlice;
int dP_nr = assignSE2partition[currSlice->dp_mode][SE_HEADER];
DataPartition *partition = &(currSlice->partArr[dP_nr]);
Bitstream *currStream = partition->bitstream;
int luma_weight_flag_l0, luma_weight_flag_l1, chroma_weight_flag_l0, chroma_weight_flag_l1;
int i,j;
img->luma_log2_weight_denom = ue_v ("SH: luma_log2_weight_denom", currStream);
img->wp_round_luma = img->luma_log2_weight_denom ? 1<<(img->luma_log2_weight_denom - 1): 0;
if ( 0 != active_sps->chroma_format_idc)
{
img->chroma_log2_weight_denom = ue_v ("SH: chroma_log2_weight_denom", currStream);
img->wp_round_chroma = img->chroma_log2_weight_denom ? 1<<(img->chroma_log2_weight_denom - 1): 0;
}
reset_wp_params(img);
for (i=0; i<img->num_ref_idx_l0_active; i++)
{
luma_weight_flag_l0 = u_1("SH: luma_weight_flag_l0", currStream);
if (luma_weight_flag_l0)
{
img->wp_weight[0][i][0] = se_v ("SH: luma_weight_l0", currStream);
img->wp_offset[0][i][0] = se_v ("SH: luma_offset_l0", currStream);
}
else
{
img->wp_weight[0][i][0] = 1<<img->luma_log2_weight_denom;
img->wp_offset[0][i][0] = 0;
}
if (active_sps->chroma_format_idc != 0)
{
chroma_weight_flag_l0 = u_1 ("SH: chroma_weight_flag_l0", currStream);
for (j=1; j<3; j++)
{
if (chroma_weight_flag_l0)
{
img->wp_weight[0][i][j] = se_v("SH: chroma_weight_l0", currStream);
img->wp_offset[0][i][j] = se_v("SH: chroma_offset_l0", currStream);
}
else
{
img->wp_weight[0][i][j] = 1<<img->chroma_log2_weight_denom;
img->wp_offset[0][i][j] = 0;
}
}
}
}
if ((img->type == B_SLICE) && active_pps->weighted_bipred_idc == 1)
{
for (i=0; i<img->num_ref_idx_l1_active; i++)
{
luma_weight_flag_l1 = u_1("SH: luma_weight_flag_l1", currStream);
if (luma_weight_flag_l1)
{
img->wp_weight[1][i][0] = se_v ("SH: luma_weight_l1", currStream);
img->wp_offset[1][i][0] = se_v ("SH: luma_offset_l1", currStream);
}
else
{
img->wp_weight[1][i][0] = 1<<img->luma_log2_weight_denom;
img->wp_offset[1][i][0] = 0;
}
if (active_sps->chroma_format_idc != 0)
{
chroma_weight_flag_l1 = u_1 ("SH: chroma_weight_flag_l1", currStream);
for (j=1; j<3; j++)
{
if (chroma_weight_flag_l1)
{
img->wp_weight[1][i][j] = se_v("SH: chroma_weight_l1", currStream);
img->wp_offset[1][i][j] = se_v("SH: chroma_offset_l1", currStream);
}
else
{
img->wp_weight[1][i][j] = 1<<img->chroma_log2_weight_denom;
img->wp_offset[1][i][j] = 0;
}
}
}
}
}
}
/*!
************************************************************************
* \brief
* read the scond part of the header (without the pic_parameter_set_id
* \return
* Length of the second part of the Slice header in bits
************************************************************************
*/
int RestOfSliceHeader()
{
Slice *currSlice = img->currentSlice;
int dP_nr = assignSE2partition[currSlice->dp_mode][SE_HEADER];
DataPartition *partition = &(currSlice->partArr[dP_nr]);
Bitstream *currStream = partition->bitstream;
int val, len;
img->frame_num = u_v (active_sps->log2_max_frame_num_minus4 + 4, "SH: frame_num", currStream);
/* Tian Dong: frame_num gap processing, if found */
if (img->idr_flag)
{
img->pre_frame_num = img->frame_num;
// picture error concealment
img->last_ref_pic_poc = 0;
assert(img->frame_num == 0);
}
if (active_sps->frame_mbs_only_flag)
{
img->structure = FRAME;
img->field_pic_flag=0;
}
else
{
// field_pic_flag u(1)
img->field_pic_flag = u_1("SH: field_pic_flag", currStream);
if (img->field_pic_flag)
{
// bottom_field_flag u(1)
img->bottom_field_flag = u_1("SH: bottom_field_flag", currStream);
img->structure = img->bottom_field_flag ? BOTTOM_FIELD : TOP_FIELD;
}
else
{
img->structure = FRAME;
img->bottom_field_flag=0;
}
}
currSlice->structure = img->structure;
img->MbaffFrameFlag=(active_sps->mb_adaptive_frame_field_flag && (img->field_pic_flag==0));
if (img->structure == FRAME ) assert (img->field_pic_flag == 0);
if (img->structure == TOP_FIELD ) assert (img->field_pic_flag == 1 && img->bottom_field_flag == 0);
if (img->structure == BOTTOM_FIELD) assert (img->field_pic_flag == 1 && img->bottom_field_flag == 1);
if (img->idr_flag)
{
img->idr_pic_id = ue_v("SH: idr_pic_id", currStream);
}
if (active_sps->pic_order_cnt_type == 0)
{
img->pic_order_cnt_lsb = u_v(active_sps->log2_max_pic_order_cnt_lsb_minus4 + 4, "SH: pic_order_cnt_lsb", currStream);
if( active_pps->pic_order_present_flag == 1 && !img->field_pic_flag )
img->delta_pic_order_cnt_bottom = se_v("SH: delta_pic_order_cnt_bottom", currStream);
else
img->delta_pic_order_cnt_bottom = 0;
}
if( active_sps->pic_order_cnt_type == 1 && !active_sps->delta_pic_order_always_zero_flag )
{
img->delta_pic_order_cnt[ 0 ] = se_v("SH: delta_pic_order_cnt[0]", currStream);
if( active_pps->pic_order_present_flag == 1 && !img->field_pic_flag )
img->delta_pic_order_cnt[ 1 ] = se_v("SH: delta_pic_order_cnt[1]", currStream);
}else
{
if (active_sps->pic_order_cnt_type == 1)
{
img->delta_pic_order_cnt[ 0 ] = 0;
img->delta_pic_order_cnt[ 1 ] = 0;
}
}
//! redundant_pic_cnt is missing here
if (active_pps->redundant_pic_cnt_present_flag)
{
img->redundant_pic_cnt = ue_v ("SH: redundant_pic_cnt", currStream);
}
if(img->type==B_SLICE)
{
img->direct_spatial_mv_pred_flag = u_1 ("SH: direct_spatial_mv_pred_flag", currStream);
}
img->num_ref_idx_l0_active = active_pps->num_ref_idx_l0_active_minus1 + 1;
img->num_ref_idx_l1_active = active_pps->num_ref_idx_l1_active_minus1 + 1;
if(img->type==P_SLICE || img->type == SP_SLICE || img->type==B_SLICE)
{
val = u_1 ("SH: num_ref_idx_override_flag", currStream);
if (val)
{
img->num_ref_idx_l0_active = 1 + ue_v ("SH: num_ref_idx_l0_active_minus1", currStream);
if(img->type==B_SLICE)
{
img->num_ref_idx_l1_active = 1 + ue_v ("SH: num_ref_idx_l1_active_minus1", currStream);
}
}
}
if (img->type!=B_SLICE)
{
img->num_ref_idx_l1_active = 0;
}
ref_pic_list_reordering();
img->apply_weights = ((active_pps->weighted_pred_flag && (currSlice->picture_type == P_SLICE || currSlice->picture_type == SP_SLICE) )
|| ((active_pps->weighted_bipred_idc > 0 ) && (currSlice->picture_type == B_SLICE)));
if ((active_pps->weighted_pred_flag&&(img->type==P_SLICE|| img->type == SP_SLICE))||
(active_pps->weighted_bipred_idc==1 && (img->type==B_SLICE)))
{
pred_weight_table();
}
if (img->nal_reference_idc)
dec_ref_pic_marking(currStream);
if (active_pps->entropy_coding_mode_flag && img->type!=I_SLICE && img->type!=SI_SLICE)
{
img->model_number = ue_v("SH: cabac_init_idc", currStream);
}
else
{
img->model_number = 0;
}
val = se_v("SH: slice_qp_delta", currStream);
currSlice->qp = img->qp = 26 + active_pps->pic_init_qp_minus26 + val;
currSlice->slice_qp_delta = val;
if(img->type==SP_SLICE || img->type == SI_SLICE)
{
if(img->type==SP_SLICE)
{
img->sp_switch = u_1 ("SH: sp_for_switch_flag", currStream);
}
val = se_v("SH: slice_qs_delta", currStream);
img->qpsp = 26 + active_pps->pic_init_qs_minus26 + val;
}
if (active_pps->deblocking_filter_control_present_flag)
{
currSlice->LFDisableIdc = ue_v ("SH: disable_deblocking_filter_idc", currStream);
if (currSlice->LFDisableIdc!=1)
{
currSlice->LFAlphaC0Offset = 2 * se_v("SH: slice_alpha_c0_offset_div2", currStream);
currSlice->LFBetaOffset = 2 * se_v("SH: slice_beta_offset_div2", currStream);
}
else
{
currSlice->LFAlphaC0Offset = currSlice->LFBetaOffset = 0;
}
}
else
{
currSlice->LFDisableIdc = currSlice->LFAlphaC0Offset = currSlice->LFBetaOffset = 0;
}
if (active_pps->num_slice_groups_minus1>0 && active_pps->slice_group_map_type>=3 &&
active_pps->slice_group_map_type<=5)
{
len = (active_sps->pic_height_in_map_units_minus1+1)*(active_sps->pic_width_in_mbs_minus1+1)/
(active_pps->slice_group_change_rate_minus1+1);
if (((active_sps->pic_height_in_map_units_minus1+1)*(active_sps->pic_width_in_mbs_minus1+1))%
(active_pps->slice_group_change_rate_minus1+1))
len +=1;
len = CeilLog2(len+1);
img->slice_group_change_cycle = u_v (len, "SH: slice_group_change_cycle", currStream);
}
img->PicHeightInMbs = img->FrameHeightInMbs / ( 1 + img->field_pic_flag );
img->PicSizeInMbs = img->PicWidthInMbs * img->PicHeightInMbs;
img->FrameSizeInMbs = img->PicWidthInMbs * img->FrameHeightInMbs;
return UsedBits;
}
