/*
*************************************************************************
* Function: decode picture display extension
* Input:
* Output:
* Return:
* Attention:
*************************************************************************
*/
void picture_display_extension()
{
int NumberOfFrameCentreOffsets;
int i;
if (progressive_sequence == 1) {
if (repeat_first_field == 1){
if (top_field_first == 1)
NumberOfFrameCentreOffsets = 3;
else
NumberOfFrameCentreOffsets = 2;
} else {
NumberOfFrameCentreOffsets = 1;
}
} else {
if (img->picture_structure == 0){
NumberOfFrameCentreOffsets = 1;
} else {
if (repeat_first_field == 1)
NumberOfFrameCentreOffsets = 3;
else
NumberOfFrameCentreOffsets = 2;
}
}
for(i = 0; i < NumberOfFrameCentreOffsets; i++){
frame_centre_horizontal_offset[i] = u_v(16, "frame_centre_horizontal_offset");
u_v(1,"marker_bit");
frame_centre_vertical_offset[i] = u_v(16, "frame_centre_vertical_offset");
u_v(1,"marker_bit");
}
}
/*!
************************************************************************
* \brief
* Interpret the Sub-sequence layer characteristics 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_subsequence_layer_characteristics_info( byte* payload, int size, ImageParameters *img )
{
Bitstream* buf;
long num_sub_layers, accurate_statistics_flag, average_bit_rate, average_frame_rate;
int i;
buf = malloc(sizeof(Bitstream));
buf->bitstream_length = size;
buf->streamBuffer = payload;
buf->frame_bitoffset = 0;
UsedBits = 0;
num_sub_layers = 1 + ue_v("SEI: num_sub_layers_minus1", buf);
#ifdef PRINT_SUBSEQUENCE_LAYER_CHAR
printf("Sub-sequence layer characteristics SEI message\n");
printf("num_sub_layers_minus1 = %d\n", num_sub_layers - 1);
#endif
for (i=0; i<num_sub_layers; i++)
{
accurate_statistics_flag = u_1( "SEI: accurate_statistics_flag", buf);
average_bit_rate = u_v(16,"SEI: average_bit_rate" , buf);
average_frame_rate = u_v(16,"SEI: average_frame_rate" , buf);
#ifdef PRINT_SUBSEQUENCE_LAYER_CHAR
printf("layer %d: accurate_statistics_flag = %ld \n", i, accurate_statistics_flag);
printf("layer %d: average_bit_rate = %ld \n", i, average_bit_rate);
printf("layer %d: average_frame_rate = %ld \n", i, average_frame_rate);
#endif
}
free (buf);
}
/*!
************************************************************************
* \brief
* Interpret the Buffering period 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_buffering_period_info( byte* payload, int size, ImageParameters *img )
{
int seq_parameter_set_id, initial_cpb_removal_delay, initial_cpb_removal_delay_offset;
unsigned int k;
Bitstream* buf;
seq_parameter_set_rbsp_t *sps;
buf = malloc(sizeof(Bitstream));
buf->bitstream_length = size;
buf->streamBuffer = payload;
buf->frame_bitoffset = 0;
UsedBits = 0;
seq_parameter_set_id = ue_v("SEI: seq_parameter_set_id" , buf);
sps = &SeqParSet[seq_parameter_set_id];
#ifdef PRINT_BUFFERING_PERIOD_INFO
printf("Buffering period SEI message\n");
printf("seq_parameter_set_id = %d\n", seq_parameter_set_id);
#endif
if (sps->vui_seq_parameters.nal_hrd_parameters_present_flag)
{
for (k=0; k<sps->vui_seq_parameters.nal_hrd_parameters.cpb_cnt; k++)
{
initial_cpb_removal_delay = u_v(sps->vui_seq_parameters.nal_hrd_parameters.cpb_removal_delay_length_minus1+1,
"SEI: initial_cpb_removal_delay" , buf);
initial_cpb_removal_delay_offset = u_v(sps->vui_seq_parameters.nal_hrd_parameters.cpb_removal_delay_length_minus1+1,
"SEI: initial_cpb_removal_delay_offset" , buf);
#ifdef PRINT_BUFFERING_PERIOD_INFO
printf("nal initial_cpb_removal_delay[%d] = %d\n", k, initial_cpb_removal_delay);
printf("nal initial_cpb_removal_delay_offset[%d] = %d\n", k, initial_cpb_removal_delay_offset);
#endif
}
}
if (sps->vui_seq_parameters.vcl_hrd_parameters_present_flag)
{
for (k=0; k<sps->vui_seq_parameters.vcl_hrd_parameters.cpb_cnt; k++)
{
initial_cpb_removal_delay = u_v(sps->vui_seq_parameters.vcl_hrd_parameters.cpb_removal_delay_length_minus1+1,
"SEI: initial_cpb_removal_delay" , buf);
initial_cpb_removal_delay_offset = u_v(sps->vui_seq_parameters.vcl_hrd_parameters.cpb_removal_delay_length_minus1+1,
"SEI: initial_cpb_removal_delay_offset" , buf);
#ifdef PRINT_BUFFERING_PERIOD_INFO
printf("vcl initial_cpb_removal_delay[%d] = %d\n", k, initial_cpb_removal_delay);
printf("vcl initial_cpb_removal_delay_offset[%d] = %d\n", k, initial_cpb_removal_delay_offset);
#endif
}
}
free (buf);
#ifdef PRINT_BUFFERING_PERIOD_INFO
#undef PRINT_BUFFERING_PERIOD_INFO
#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;
}
void extension_data(char *buf,int startcodepos, int length)
{
int ext_ID;
memcpy (currStream->streamBuffer, buf, length);
currStream->code_len = currStream->bitstream_length = length;
currStream->read_len = currStream->frame_bitoffset = (startcodepos+1)*8;
ext_ID = u_v(4,"extension ID");
switch (ext_ID)
{
case SEQUENCE_DISPLAY_EXTENSION_ID:
sequence_display_extension();
break;
case COPYRIGHT_EXTENSION_ID:
copyright_extension();
break;
case PICTURE_DISPLAY_EXTENSION_ID:
picture_display_extension();
case CAMERAPARAMETERS_EXTENSION_ID:
cameraparameters_extension();
break;
default:
printf("reserved extension start code ID %d\n",ext_ID);
break;
}
}
/*!
************************************************************************
* \brief
* Interpret the Random access point 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_random_access_info( byte* payload, int size, ImageParameters *img )
{
int recovery_frame_cnt, exact_match_flag, broken_link_flag, changing_slice_group_idc;
Bitstream* buf;
#ifdef ESLCPP
buf = (Bitstream*)malloc(sizeof(Bitstream));
#else
buf = malloc(sizeof(Bitstream));
#endif
buf->bitstream_length = size;
buf->streamBuffer = payload;
buf->frame_bitoffset = 0;
UsedBits = 0;
recovery_frame_cnt = ue_v( "SEI: recovery_frame_cnt" , buf);
exact_match_flag = u_1 ( "SEI: exact_match_flag" , buf);
broken_link_flag = u_1 ( "SEI: broken_link_flag" , buf);
changing_slice_group_idc = u_v ( 2, "SEI: changing_slice_group_idc", buf);
#ifdef PRINT_RANDOM_ACCESS
printf("Random access point SEI message\n");
printf("recovery_frame_cnt = %d\n", recovery_frame_cnt);
printf("exact_match_flag = %d\n", exact_match_flag);
printf("broken_link_flag = %d\n", broken_link_flag);
printf("changing_slice_group_idc = %d\n", changing_slice_group_idc);
#endif
free (buf);
#ifdef PRINT_RANDOM_ACCESS
#undef PRINT_RANDOM_ACCESS
#endif
}
/*!
************************************************************************
* \brief
* read the first part of the header (only the pic_parameter_set_id)
* \return
* Length of the first part of the slice header (in bits)
************************************************************************
*/
int FirstPartOfSliceHeader(Slice *currSlice)
{
VideoParameters *p_Vid = currSlice->p_Vid;
byte dP_nr = assignSE2partition[currSlice->dp_mode][SE_HEADER];
DataPartition *partition = &(currSlice->partArr[dP_nr]);
Bitstream *currStream = partition->bitstream;
int tmp;
p_Dec->UsedBits= partition->bitstream->frame_bitoffset; // was hardcoded to 31 for previous start-code. This is better.
// Get first_mb_in_slice
currSlice->start_mb_nr = ue_v ("SH: first_mb_in_slice", currStream);
tmp = ue_v ("SH: slice_type", currStream);
if (tmp > 4) tmp -= 5;
p_Vid->type = currSlice->slice_type = (SliceType) tmp;
currSlice->pic_parameter_set_id = ue_v ("SH: pic_parameter_set_id", currStream);
if( p_Vid->separate_colour_plane_flag )
currSlice->colour_plane_id = u_v (2, "SH: colour_plane_id", currStream);
else
currSlice->colour_plane_id = PLANE_Y;
return p_Dec->UsedBits;
}
/*
*************************************************************************
* Function: decode sequence display extension
* Input:
* Output:
* Return:
* Attention:
*************************************************************************
*/
void sequence_display_extension()
{
video_format = u_v(3,"video format ID");
video_range = u_v(1,"video range");
color_description = u_v(1,"color description");
if (color_description)
{
color_primaries = u_v(8,"color primaries");
transfer_characteristics = u_v(8,"transfer characteristics");
matrix_coefficients = u_v(8,"matrix coefficients");
}
display_horizontal_size = u_v(14,"display_horizontaol_size");
u_v (1, "marker bit" );
display_vertical_size = u_v(14,"display_vertical_size");
u_v (2, "reserved bits" );
}
void copyright_extension()
{
int reserved_data;
int marker_bit;
copyright_flag = u_v(1,"copyright_flag");
copyright_identifier = u_v(8,"copyright_identifier");
original_or_copy = u_v(1,"original_or_copy");
/* reserved */
reserved_data = u_v(7,"reserved_data");
marker_bit = u_v(1,"marker_bit");
copyright_number_1 = u_v(20,"copyright_number_1");
marker_bit = u_v(1,"marker_bit");
copyright_number_2 = u_v(22,"copyright_number_2");
marker_bit = u_v(1,"marker_bit");
copyright_number_3 = u_v(22,"copyright_number_3");
}
void user_data(char *buf,int startcodepos, int length)
{
int user_data;
int i;
memcpy (currStream->streamBuffer, buf, length);
currStream->code_len = currStream->bitstream_length = length;
currStream->read_len = currStream->frame_bitoffset = (startcodepos+1)*8;
for(i=0; i<length-4; i++)
user_data = u_v (8, "user data");
}
void nal_unit_header_mvc_extension(NALUnitHeaderMVCExt_t *NaluHeaderMVCExt, Bitstream *s)
{
//to be implemented;
NaluHeaderMVCExt->non_idr_flag = u_v (1, "non_idr_flag" , s);
NaluHeaderMVCExt->priority_id = u_v (6, "priority_id" , s);
NaluHeaderMVCExt->view_id = u_v (10, "view_id" , s);
NaluHeaderMVCExt->temporal_id = u_v (3, "temporal_id" , s);
NaluHeaderMVCExt->anchor_pic_flag = u_v (1, "anchor_pic_flag" , s);
NaluHeaderMVCExt->inter_view_flag = u_v (1, "inter_view_flag" , s);
NaluHeaderMVCExt->reserved_one_bit = u_v (1, "reserved_one_bit" , s);
if(NaluHeaderMVCExt->reserved_one_bit != 1)
{
printf("Nalu Header MVC Extension: reserved_one_bit is not 1!\n");
}
}
void cameraparameters_extension()
{
// int marker_bit1,marker_bit,marker_bit2;
// float reserved_data;
/* reserved */
u_v(1,"reserved");
u_v(7,"camera id");
u_v(1,"marker bit");
u_v(22,"height_of_image_device");
u_v(1,"marker bit");
u_v(22,"focal_length");
u_v(1,"marker bit");
u_v(22,"f_number");
u_v(1,"marker bit");
u_v(22,"vertical_angle_of_view");
u_v(1,"marker bit");
u_v(16,"camera_position_x_upper");
u_v(1,"marker bit");
u_v(16,"camera_position_x_lower");
u_v(1,"marker bit");
u_v(16,"camera_position_y_upper");
u_v(1,"marker bit");
u_v(16,"camera_position_y_lower");
u_v(1,"marker bit");
u_v(16,"camera_position_z_upper");
u_v(1,"marker bit");
u_v(16,"camera_position_z_lower");
u_v(1,"marker bit");
u_v(22,"camera_direction_x");
u_v(1,"marker bit");
u_v(22,"camera_direction_y");
u_v(1,"marker bit");
u_v(22,"camera_direction_z");
u_v(1,"marker bit");
u_v(22,"image_plane_vertical_x");
u_v(1,"marker bit");
u_v(22,"image_plane_vertical_y");
u_v(1,"marker bit");
u_v(22,"image_plane_vertical_z");
u_v(1,"marker bit");
u_v(32,"reserved data");
}
/*!
************************************************************************
* \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;
}
/*!
*************************************************************************************
* \brief
* ue_v, reads an u(1) syntax element, the length in bits is stored in
* the global UsedBits variable
*
* \param tracestring
* the string for the trace file
*
* \param bitstream
* the stream to be read from
*
* \return
* the value of the coded syntax element
*
*************************************************************************************
*/
Boolean u_1 (char *tracestring, Bitstream *bitstream)
{
return (Boolean) u_v (1, tracestring, bitstream);
}
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;
}
/***********************************************************************
*\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
* Interpret the Sub-sequence characteristics 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_subsequence_characteristics_info( byte* payload, int size, ImageParameters *img )
{
Bitstream* buf;
int i;
int sub_seq_layer_num, sub_seq_id, duration_flag, average_rate_flag, accurate_statistics_flag;
unsigned long sub_seq_duration, average_bit_rate, average_frame_rate;
int num_referenced_subseqs, ref_sub_seq_layer_num, ref_sub_seq_id, ref_sub_seq_direction;
#ifdef ESLCPP
buf = (Bitstream*)malloc(sizeof(Bitstream));
#else
buf = malloc(sizeof(Bitstream));
#endif
buf->bitstream_length = size;
buf->streamBuffer = payload;
buf->frame_bitoffset = 0;
UsedBits = 0;
sub_seq_layer_num = ue_v("SEI: sub_seq_layer_num", buf);
sub_seq_id = ue_v("SEI: sub_seq_id", buf);
duration_flag = u_1 ("SEI: duration_flag", buf);
#ifdef PRINT_SUBSEQUENCE_CHAR
printf("Sub-sequence characteristics SEI message\n");
printf("sub_seq_layer_num = %d\n", sub_seq_layer_num );
printf("sub_seq_id = %d\n", sub_seq_id);
printf("duration_flag = %d\n", duration_flag);
#endif
if ( duration_flag )
{
sub_seq_duration = u_v (32, "SEI: duration_flag", buf);
#ifdef PRINT_SUBSEQUENCE_CHAR
printf("sub_seq_duration = %ld\n", sub_seq_duration);
#endif
}
average_rate_flag = u_1 ("SEI: average_rate_flag", buf);
#ifdef PRINT_SUBSEQUENCE_CHAR
printf("average_rate_flag = %d\n", average_rate_flag);
#endif
if ( average_rate_flag )
{
accurate_statistics_flag = u_1 ( "SEI: accurate_statistics_flag", buf);
average_bit_rate = u_v (16, "SEI: average_bit_rate", buf);
average_frame_rate = u_v (16, "SEI: average_frame_rate", buf);
#ifdef PRINT_SUBSEQUENCE_CHAR
printf("accurate_statistics_flag = %d\n", accurate_statistics_flag);
printf("average_bit_rate = %ld\n", average_bit_rate);
printf("average_frame_rate = %ld\n", average_frame_rate);
#endif
}
num_referenced_subseqs = ue_v("SEI: num_referenced_subseqs", buf);
#ifdef PRINT_SUBSEQUENCE_CHAR
printf("num_referenced_subseqs = %d\n", num_referenced_subseqs);
#endif
for (i=0; i<num_referenced_subseqs; i++)
{
ref_sub_seq_layer_num = ue_v("SEI: ref_sub_seq_layer_num", buf);
ref_sub_seq_id = ue_v("SEI: ref_sub_seq_id", buf);
ref_sub_seq_direction = u_1 ("SEI: ref_sub_seq_direction", buf);
#ifdef PRINT_SUBSEQUENCE_CHAR
printf("ref_sub_seq_layer_num = %d\n", ref_sub_seq_layer_num);
printf("ref_sub_seq_id = %d\n", ref_sub_seq_id);
printf("ref_sub_seq_direction = %d\n", ref_sub_seq_direction);
#endif
}
free( buf );
#ifdef PRINT_SUBSEQUENCE_CHAR
#undef PRINT_SUBSEQUENCE_CHAR
#endif
}
/*!
*************************************************************************************
* \brief
* ue_v, reads an u(1) syntax element, the length in bits is stored in
* the global UsedBits variable
*
* \param tracestring
* the string for the trace file
*
* \param bitstream
* the stream to be read from
*
* \return
* the value of the coded syntax element
*
*************************************************************************************
*/
int u_1 (char *tracestring, Bitstream *bitstream)
{
return u_v (1, tracestring, bitstream);
}
/*
*************************************************************************
* 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;
}
/*!
************************************************************************
* \brief
* Interpret the Picture timing 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_picture_timing_info( byte* payload, int size, ImageParameters *img )
{
int cpb_removal_delay, dpb_output_delay, picture_structure_present_flag, picture_structure;
int clock_time_stamp_flag;
int ct_type, nuit_field_based_flag, counting_type, full_timestamp_flag, discontinuity_flag, cnt_dropped_flag, nframes;
int seconds_value, minutes_value, hours_value, seconds_flag, minutes_flag, hours_flag, time_offset;
int NumClockTs = 0;
int i;
Bitstream* buf;
#ifdef ESLCPP
buf = (Bitstream*)malloc(sizeof(Bitstream));
#else
buf = malloc(sizeof(Bitstream));
#endif
buf->bitstream_length = size;
buf->streamBuffer = payload;
buf->frame_bitoffset = 0;
UsedBits = 0;
assert (NULL!=active_sps);
#ifdef PRINT_PCITURE_TIMING_INFO
printf("Picture timing SEI message\n");
#endif
if ((active_sps->vui_seq_parameters.nal_hrd_parameters_present_flag)||
(active_sps->vui_seq_parameters.vcl_hrd_parameters_present_flag))
{
cpb_removal_delay = ue_v("SEI: cpb_removal_delay" , buf);
dpb_output_delay = ue_v("SEI: dpb_output_delay" , buf);
#ifdef PRINT_PCITURE_TIMING_INFO
printf("cpb_removal_delay = %d\n",cpb_removal_delay);
printf("dpb_output_delay = %d\n",dpb_output_delay);
#endif
}
picture_structure_present_flag = u_1("SEI: picture_structure_present_flag" , buf);
#ifdef PRINT_PCITURE_TIMING_INFO
printf("picture_structure_present_flag = %d\n",picture_structure_present_flag);
#endif
if (picture_structure_present_flag)
{
picture_structure = u_v(3, "SEI: picture_structure" , buf);
#ifdef PRINT_PCITURE_TIMING_INFO
printf("picture_structure = %d\n",picture_structure);
#endif
switch (picture_structure)
{
case 0:
case 1:
case 2:
NumClockTs = 1;
break;
case 3:
case 4:
case 7:
NumClockTs = 2;
break;
case 5:
case 6:
case 8:
NumClockTs = 3;
break;
default:
error("reserved picture_structure used (can't determine NumClockTs)", 500);
}
for (i=0; i<NumClockTs; i++)
{
clock_time_stamp_flag = u_1("SEI: clock_time_stamp_flag" , buf);
#ifdef PRINT_PCITURE_TIMING_INFO
printf("clock_time_stamp_flag = %d\n",clock_time_stamp_flag);
#endif
if (clock_time_stamp_flag)
{
ct_type = u_v(2, "SEI: ct_type" , buf);
nuit_field_based_flag = u_1( "SEI: nuit_field_based_flag" , buf);
counting_type = u_v(5, "SEI: counting_type" , buf);
full_timestamp_flag = u_1( "SEI: full_timestamp_flag" , buf);
discontinuity_flag = u_1( "SEI: discontinuity_flag" , buf);
cnt_dropped_flag = u_1( "SEI: cnt_dropped_flag" , buf);
nframes = u_v(8, "SEI: nframes" , buf);
#ifdef PRINT_PCITURE_TIMING_INFO
printf("ct_type = %d\n",ct_type);
printf("nuit_field_based_flag = %d\n",nuit_field_based_flag);
printf("full_timestamp_flag = %d\n",full_timestamp_flag);
printf("discontinuity_flag = %d\n",discontinuity_flag);
printf("cnt_dropped_flag = %d\n",cnt_dropped_flag);
printf("nframes = %d\n",nframes);
#endif
if (full_timestamp_flag)
{
seconds_value = u_v(6, "SEI: seconds_value" , buf);
minutes_value = u_v(6, "SEI: minutes_value" , buf);
hours_value = u_v(5, "SEI: hours_value" , buf);
#ifdef PRINT_PCITURE_TIMING_INFO
printf("seconds_value = %d\n",seconds_value);
printf("minutes_value = %d\n",minutes_value);
printf("hours_value = %d\n",hours_value);
#endif
}
else
{
seconds_flag = u_1( "SEI: seconds_flag" , buf);
#ifdef PRINT_PCITURE_TIMING_INFO
printf("seconds_flag = %d\n",seconds_flag);
#endif
if (seconds_flag)
{
seconds_value = u_v(6, "SEI: seconds_value" , buf);
minutes_flag = u_1( "SEI: minutes_flag" , buf);
#ifdef PRINT_PCITURE_TIMING_INFO
printf("seconds_value = %d\n",seconds_value);
printf("minutes_flag = %d\n",minutes_flag);
#endif
if(minutes_flag)
{
minutes_value = u_v(6, "SEI: minutes_value" , buf);
hours_flag = u_1( "SEI: hours_flag" , buf);
#ifdef PRINT_PCITURE_TIMING_INFO
printf("minutes_value = %d\n",minutes_value);
printf("hours_flag = %d\n",hours_flag);
#endif
if(hours_flag)
{
hours_value = u_v(5, "SEI: hours_value" , buf);
#ifdef PRINT_PCITURE_TIMING_INFO
printf("hours_value = %d\n",hours_value);
#endif
}
}
}
}
if(active_sps->vui_seq_parameters.nal_hrd_parameters.time_offset_length) //!KS which HRD params shall be used?
{
time_offset=0;
// time_offset = i_v(active_sps->vui_seq_parameters.nal_hrd_parameters.time_offset_length, "SEI: time_offset" , buf);
#ifdef PRINT_PCITURE_TIMING_INFO
printf("time_offset = %d\n",time_offset);
#endif
}
}
}
}
free (buf);
#ifdef PRINT_PCITURE_TIMING_INFO
#undef PRINT_PCITURE_TIMING_INFO
#endif
}
void SliceHeader (char *buf,int startcodepos, int length)
{
int i;
int weight_para_num;
int mb_row;
int mb_index;
int mb_width, mb_height;
memcpy (currStream->streamBuffer, buf, length);
currStream->code_len = currStream->bitstream_length = length;
currStream->read_len = currStream->frame_bitoffset = (startcodepos)*8;
slice_vertical_position = u_v (8, "slice vertical position");
if(vertical_size > 2800)
slice_vertical_position_extension = u_v (3, "slice vertical position extension");
if (vertical_size > 2800)
mb_row = (slice_vertical_position_extension << 7) + slice_vertical_position;
else
mb_row = slice_vertical_position;
mb_width = (horizontal_size + 15) / 16;
if(!progressive_sequence)
mb_height = 2 * ((vertical_size + 31) / 32);
else
mb_height = (vertical_size + 15) / 16;
mb_index = mb_row * mb_width;
if (!img->picture_structure && img->type==I_IMG && (mb_index >= mb_width*mb_height/2) ) {
second_IField = 1;
img->type = P_IMG;
pre_img_type = P_IMG;
}
if (!fixed_picture_qp)
{
fixed_slice_qp = u_v (1,"fixed_slice_qp");
slice_qp = u_v (6,"slice_qp");
img->qp=slice_qp;
}
if(img->type != I_IMG){
img->slice_weighting_flag = u_v(1,"slice weighting flag");
if(img->slice_weighting_flag)
{
if(second_IField && !img->picture_structure) //I bottom
weight_para_num=1;
else if(img->type==P_IMG && img->picture_structure) //P frame coding
weight_para_num=2;
else if(img->type==P_IMG && !img->picture_structure) //P field coding
weight_para_num=4;
else if(img->type==B_IMG && img->picture_structure) //B frame coding
weight_para_num=2;
else if(img->type==B_IMG && !img->picture_structure) //B field coding
weight_para_num=4;
for(i=0;i<weight_para_num;i++)
{
img->lum_scale[i] = u_v(8,"luma scale");
img->lum_shift[i] =i_8("luma shift");
u_1 ("insert bit");
img->chroma_scale[i] = u_v(8,"chroma scale");
img->chroma_shift[i] = i_8("chroma shift");
u_1 ("insert bit");
}
img->mb_weighting_flag =u_v(1,"MB weighting flag");
}
}
}
void SequenceHeader (char *buf,int startcodepos, int length)
{
memcpy (currStream->streamBuffer, buf, length);
currStream->code_len = currStream->bitstream_length = length;
currStream->read_len = currStream->frame_bitoffset = (startcodepos+1)*8;
profile_id = u_v (8, "profile_id" );
level_id = u_v (8, "level_id" );
progressive_sequence = u_v (1, "progressive_sequence" );
horizontal_size = u_v (14, "horizontal_size" );
vertical_size = u_v (14, "vertical_size" );
chroma_format = u_v (2, "chroma_format" );
sample_precision = u_v (3, "sample_precision" );
aspect_ratio_information = u_v (4, "aspect_ratio_information" );
frame_rate_code = u_v (4, "frame_rate_code" );
bit_rate_lower = u_v (18, "bit_rate_lower" );
u_v (1, "marker bit" );
bit_rate_upper = u_v (12, "bit_rate_upper" );
low_delay = u_v (1, "low_delay" );
u_v (1, "marker bit" );
bbv_buffer_size = u_v(18,"bbv buffer size");
u_v (3,"reseved bits" );
img->width = horizontal_size;
img->height = vertical_size;
img->width_cr = (img->width>>1);
if(chroma_format==2)
img->height_cr = (img->height);
else
img->height_cr = (img->height>>1);
img->PicWidthInMbs = img->width/MB_BLOCK_SIZE;
img->PicHeightInMbs = img->height/MB_BLOCK_SIZE;
img->PicSizeInMbs = img->PicWidthInMbs * img->PicHeightInMbs;
img->buf_cycle = input->buf_cycle+1;
img->max_mb_nr =(img->width * img->height) / (MB_BLOCK_SIZE * MB_BLOCK_SIZE);
}
/*!
************************************************************************
* \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;
}
