blob: ee383158b6f43ca172f922a8ec9dc176a15c5d0e [file] [log] [blame]
/******************************************************************************
*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*****************************************************************************
* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
*/
/*!
**************************************************************************
* \file ih264d_parse_headers.c
*
* \brief
* Contains High level syntax[above slice] parsing routines
*
* \date
* 19/12/2002
*
* \author AI
**************************************************************************
*/
#include <string.h>
#include "ih264_typedefs.h"
#include "ih264_macros.h"
#include "ih264_platform_macros.h"
#include "ih264d_bitstrm.h"
#include "ih264d_structs.h"
#include "ih264d_parse_cavlc.h"
#include "ih264d_defs.h"
#include "ih264d_defs.h"
#include "ih264d_defs.h"
#include "ih264d_parse_slice.h"
#include "ih264d_tables.h"
#include "ih264d_utils.h"
#include "ih264d_nal.h"
#include "ih264d_deblocking.h"
#include "ih264d_mem_request.h"
#include "ih264d_debug.h"
#include "ih264d_error_handler.h"
#include "ih264d_mb_utils.h"
#include "ih264d_sei.h"
#include "ih264d_vui.h"
#include "ih264d_thread_parse_decode.h"
#include "ih264d_thread_compute_bs.h"
#include "ih264d_quant_scaling.h"
#include "ih264d_defs.h"
#include "ivd.h"
#include "ih264d.h"
/*****************************************************************************/
/* */
/* Function Name : ih264d_parse_slice_partition */
/* */
/* Description : This function is intended to parse and decode slice part */
/* itions. Currently it's not implemented. Decoder will */
/* print a message, skips this NAL and continues */
/* Inputs : ps_dec Decoder parameters */
/* ps_bitstrm Bitstream */
/* Globals : None */
/* Processing : This functionality needs to be implemented */
/* Outputs : None */
/* Returns : None */
/* */
/* Issues : Not implemented */
/* */
/* Revision History: */
/* */
/* DD MM YYYY Author(s) Changes (Describe the changes made) */
/* 06 05 2002 NS Draft */
/* */
/*****************************************************************************/
WORD32 ih264d_parse_slice_partition(dec_struct_t * ps_dec,
dec_bit_stream_t * ps_bitstrm)
{
H264_DEC_DEBUG_PRINT("\nSlice partition not supported");
UNUSED(ps_dec);
UNUSED(ps_bitstrm);
return (0);
}
/*****************************************************************************/
/* */
/* Function Name : ih264d_parse_sei */
/* */
/* Description : This function is intended to parse and decode SEI */
/* Currently it's not implemented. Decoder will print a */
/* message, skips this NAL and continues */
/* Inputs : ps_dec Decoder parameters */
/* ps_bitstrm Bitstream */
/* Globals : None */
/* Processing : This functionality needs to be implemented */
/* Outputs : None */
/* Returns : None */
/* */
/* Issues : Not implemented */
/* */
/* Revision History: */
/* */
/* DD MM YYYY Author(s) Changes (Describe the changes made) */
/* 06 05 2002 NS Draft */
/* */
/*****************************************************************************/
WORD32 ih264d_parse_sei(dec_struct_t * ps_dec, dec_bit_stream_t * ps_bitstrm)
{
UNUSED(ps_dec);
UNUSED(ps_bitstrm);
return (0);
}
/*****************************************************************************/
/* */
/* Function Name : ih264d_parse_filler_data */
/* */
/* Description : This function is intended to parse and decode filler */
/* data NAL. Currently it's not implemented. Decoder will */
/* print a message, skips this NAL and continues */
/* Inputs : ps_dec Decoder parameters */
/* ps_bitstrm Bitstream */
/* Globals : None */
/* Processing : This functionality needs to be implemented */
/* Outputs : None */
/* Returns : None */
/* */
/* Issues : Not implemented */
/* */
/* Revision History: */
/* */
/* DD MM YYYY Author(s) Changes (Describe the changes made) */
/* 06 05 2002 NS Draft */
/* */
/*****************************************************************************/
WORD32 ih264d_parse_filler_data(dec_struct_t * ps_dec,
dec_bit_stream_t * ps_bitstrm)
{
UNUSED(ps_dec);
UNUSED(ps_bitstrm);
return (0);
}
/*****************************************************************************/
/* */
/* Function Name : ih264d_parse_end_of_stream */
/* */
/* Description : This function is intended to parse and decode end of */
/* sequence. Currently it's not implemented. Decoder will */
/* print a message, skips this NAL and continues */
/* Inputs : ps_dec Decoder parameters */
/* Globals : None */
/* Processing : This functionality needs to be implemented */
/* Outputs : None */
/* Returns : None */
/* */
/* Issues : Not implemented */
/* */
/* Revision History: */
/* */
/* DD MM YYYY Author(s) Changes (Describe the changes made) */
/* 06 05 2002 NS Draft */
/* */
/*****************************************************************************/
void ih264d_parse_end_of_stream(dec_struct_t * ps_dec)
{
UNUSED(ps_dec);
return;
}
/*!
**************************************************************************
* \if Function name : ih264d_parse_pps \endif
*
* \brief
* Decodes Picture Parameter set
*
* \return
* 0 on Success and Error code otherwise
**************************************************************************
*/
WORD32 ih264d_parse_pps(dec_struct_t * ps_dec, dec_bit_stream_t * ps_bitstrm)
{
UWORD8 uc_temp;
dec_seq_params_t * ps_sps = NULL;
dec_pic_params_t * ps_pps = NULL;
UWORD32 *pu4_bitstrm_buf = ps_dec->ps_bitstrm->pu4_buffer;
UWORD32 *pu4_bitstrm_ofst = &ps_dec->ps_bitstrm->u4_ofst;
/* Variables used for error resilience checks */
UWORD32 u4_temp;
WORD32 i_temp;
/* For High profile related syntax elements */
UWORD8 u1_more_data_flag;
WORD32 i4_i;
/*--------------------------------------------------------------------*/
/* Decode pic_parameter_set_id and find corresponding pic params */
/*--------------------------------------------------------------------*/
u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
if(u4_temp & MASK_ERR_PIC_SET_ID)
return ERROR_INV_SPS_PPS_T;
ps_pps = ps_dec->pv_scratch_sps_pps;
*ps_pps = ps_dec->ps_pps[u4_temp];
ps_pps->u1_pic_parameter_set_id = (WORD8)u4_temp;
COPYTHECONTEXT("PPS: pic_parameter_set_id",ps_pps->u1_pic_parameter_set_id);
/************************************************/
/* initilization of High profile syntax element */
/************************************************/
ps_pps->i4_transform_8x8_mode_flag = 0;
ps_pps->i4_pic_scaling_matrix_present_flag = 0;
/*--------------------------------------------------------------------*/
/* Decode seq_parameter_set_id and map it to a seq_parameter_set */
/*--------------------------------------------------------------------*/
u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
if(u4_temp & MASK_ERR_SEQ_SET_ID)
return ERROR_INV_SPS_PPS_T;
COPYTHECONTEXT("PPS: seq_parameter_set_id",u4_temp);
ps_sps = &ps_dec->ps_sps[u4_temp];
ps_pps->ps_sps = ps_sps;
/*--------------------------------------------------------------------*/
/* Decode entropy_coding_mode */
/*--------------------------------------------------------------------*/
ps_pps->u1_entropy_coding_mode = ih264d_get_bit_h264(ps_bitstrm);
COPYTHECONTEXT("PPS: entropy_coding_mode_flag",ps_pps->u1_entropy_coding_mode);
ps_pps->u1_pic_order_present_flag = ih264d_get_bit_h264(ps_bitstrm);
COPYTHECONTEXT("PPS: pic_order_present_flag",ps_pps->u1_pic_order_present_flag);
/*--------------------------------------------------------------------*/
/* Decode num_slice_groups_minus1 */
/*--------------------------------------------------------------------*/
u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf) + 1;
if(u4_temp != 1)
{
UWORD32 i4_error_code;
i4_error_code = ERROR_FEATURE_UNAVAIL;
return i4_error_code;
}
ps_pps->u1_num_slice_groups = u4_temp;
COPYTHECONTEXT("PPS: num_slice_groups_minus1",ps_pps->u1_num_slice_groups -1);
/*--------------------------------------------------------------------*/
/* Other parameter set values */
/*--------------------------------------------------------------------*/
u4_temp = 1 + ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
if(u4_temp > H264_MAX_REF_IDX)
return ERROR_REF_IDX;
ps_pps->u1_num_ref_idx_lx_active[0] = u4_temp;
COPYTHECONTEXT("PPS: num_ref_idx_l0_active_minus1",
ps_pps->u1_num_ref_idx_lx_active[0] - 1);
u4_temp = 1 + ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
if(u4_temp > H264_MAX_REF_IDX)
return ERROR_REF_IDX;
ps_pps->u1_num_ref_idx_lx_active[1] = u4_temp;
COPYTHECONTEXT("PPS: num_ref_idx_l1_active_minus1",
ps_pps->u1_num_ref_idx_lx_active[1] - 1);
ps_pps->u1_wted_pred_flag = ih264d_get_bit_h264(ps_bitstrm);
COPYTHECONTEXT("PPS: weighted prediction u4_flag",ps_pps->u1_wted_pred_flag);
uc_temp = ih264d_get_bits_h264(ps_bitstrm, 2);
COPYTHECONTEXT("PPS: weighted_bipred_idc",uc_temp);
ps_pps->u1_wted_bipred_idc = uc_temp;
if(ps_pps->u1_wted_bipred_idc > MAX_WEIGHT_BIPRED_IDC)
return ERROR_INV_SPS_PPS_T;
i_temp = 26 + ih264d_sev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
if((i_temp < 0) || (i_temp > 51))
return ERROR_INV_RANGE_QP_T;
ps_pps->u1_pic_init_qp = i_temp;
COPYTHECONTEXT("PPS: pic_init_qp_minus26",ps_pps->u1_pic_init_qp - 26);
i_temp = 26 + ih264d_sev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
if((i_temp < 0) || (i_temp > 51))
return ERROR_INV_RANGE_QP_T;
ps_pps->u1_pic_init_qs = i_temp;
COPYTHECONTEXT("PPS: pic_init_qs_minus26",ps_pps->u1_pic_init_qs - 26);
i_temp = ih264d_sev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
if((i_temp < -12) || (i_temp > 12))
return ERROR_INV_RANGE_QP_T;
ps_pps->i1_chroma_qp_index_offset = i_temp;
COPYTHECONTEXT("PPS: chroma_qp_index_offset",ps_pps->i1_chroma_qp_index_offset);
/***************************************************************************/
/* initialize second_chroma_qp_index_offset to i1_chroma_qp_index_offset if */
/* second_chroma_qp_index_offset is not present in bit-ps_bitstrm */
/***************************************************************************/
ps_pps->i1_second_chroma_qp_index_offset =
ps_pps->i1_chroma_qp_index_offset;
ps_pps->u1_deblocking_filter_parameters_present_flag = ih264d_get_bit_h264(
ps_bitstrm);
COPYTHECONTEXT("PPS: deblocking_filter_control_present_flag",
ps_pps->u1_deblocking_filter_parameters_present_flag);
ps_pps->u1_constrained_intra_pred_flag = ih264d_get_bit_h264(ps_bitstrm);
COPYTHECONTEXT("PPS: constrained_intra_pred_flag",
ps_pps->u1_constrained_intra_pred_flag);
ps_pps->u1_redundant_pic_cnt_present_flag = ih264d_get_bit_h264(ps_bitstrm);
COPYTHECONTEXT("PPS: redundant_pic_cnt_present_flag",
ps_pps->u1_redundant_pic_cnt_present_flag);
/* High profile related syntax elements */
u1_more_data_flag = MORE_RBSP_DATA(ps_bitstrm);
if(u1_more_data_flag && (ps_pps->ps_sps->u1_profile_idc == HIGH_PROFILE_IDC))
{
/* read transform_8x8_mode_flag */
ps_pps->i4_transform_8x8_mode_flag = (WORD32)ih264d_get_bit_h264(
ps_bitstrm);
/* read pic_scaling_matrix_present_flag */
ps_pps->i4_pic_scaling_matrix_present_flag =
(WORD32)ih264d_get_bit_h264(ps_bitstrm);
if(ps_pps->i4_pic_scaling_matrix_present_flag)
{
/* read the scaling matrices */
for(i4_i = 0; i4_i < (6 + (ps_pps->i4_transform_8x8_mode_flag << 1)); i4_i++)
{
ps_pps->u1_pic_scaling_list_present_flag[i4_i] =
ih264d_get_bit_h264(ps_bitstrm);
if(ps_pps->u1_pic_scaling_list_present_flag[i4_i])
{
if(i4_i < 6)
{
ih264d_scaling_list(
ps_pps->i2_pic_scalinglist4x4[i4_i],
16,
&ps_pps->u1_pic_use_default_scaling_matrix_flag[i4_i],
ps_bitstrm);
}
else
{
ih264d_scaling_list(
ps_pps->i2_pic_scalinglist8x8[i4_i - 6],
64,
&ps_pps->u1_pic_use_default_scaling_matrix_flag[i4_i],
ps_bitstrm);
}
}
}
}
/* read second_chroma_qp_index_offset syntax element */
i_temp = ih264d_sev(
pu4_bitstrm_ofst, pu4_bitstrm_buf);
if((i_temp < -12) || (i_temp > 12))
return ERROR_INV_RANGE_QP_T;
ps_pps->i1_second_chroma_qp_index_offset = i_temp;
}
/* In case bitstream read has exceeded the filled size, then
return an error */
if(ps_bitstrm->u4_ofst > ps_bitstrm->u4_max_ofst + 8)
{
return ERROR_INV_SPS_PPS_T;
}
ps_pps->u1_is_valid = TRUE;
ps_dec->ps_pps[ps_pps->u1_pic_parameter_set_id] = *ps_pps;
return OK;
}
/*!
**************************************************************************
* \if Function name : ih264d_parse_sps \endif
*
* \brief
* Decodes Sequence parameter set from the bitstream
*
* \return
* 0 on Success and Error code otherwise
**************************************************************************
*/
UWORD32 ih264d_correct_level_idc(UWORD32 u4_level_idc, UWORD32 u4_total_mbs)
{
UWORD32 u4_max_mbs_allowed;
switch(u4_level_idc)
{
case H264_LEVEL_1_0:
u4_max_mbs_allowed = MAX_MBS_LEVEL_10;
break;
case H264_LEVEL_1_1:
u4_max_mbs_allowed = MAX_MBS_LEVEL_11;
break;
case H264_LEVEL_1_2:
u4_max_mbs_allowed = MAX_MBS_LEVEL_12;
break;
case H264_LEVEL_1_3:
u4_max_mbs_allowed = MAX_MBS_LEVEL_13;
break;
case H264_LEVEL_2_0:
u4_max_mbs_allowed = MAX_MBS_LEVEL_20;
break;
case H264_LEVEL_2_1:
u4_max_mbs_allowed = MAX_MBS_LEVEL_21;
break;
case H264_LEVEL_2_2:
u4_max_mbs_allowed = MAX_MBS_LEVEL_22;
break;
case H264_LEVEL_3_0:
u4_max_mbs_allowed = MAX_MBS_LEVEL_30;
break;
case H264_LEVEL_3_1:
u4_max_mbs_allowed = MAX_MBS_LEVEL_31;
break;
case H264_LEVEL_3_2:
u4_max_mbs_allowed = MAX_MBS_LEVEL_32;
break;
case H264_LEVEL_4_0:
u4_max_mbs_allowed = MAX_MBS_LEVEL_40;
break;
case H264_LEVEL_4_1:
u4_max_mbs_allowed = MAX_MBS_LEVEL_41;
break;
case H264_LEVEL_4_2:
u4_max_mbs_allowed = MAX_MBS_LEVEL_42;
break;
case H264_LEVEL_5_0:
u4_max_mbs_allowed = MAX_MBS_LEVEL_50;
break;
case H264_LEVEL_5_1:
default:
u4_max_mbs_allowed = MAX_MBS_LEVEL_51;
break;
}
/*correct of the level is incorrect*/
if(u4_total_mbs > u4_max_mbs_allowed)
{
if(u4_total_mbs > MAX_MBS_LEVEL_50)
u4_level_idc = H264_LEVEL_5_1;
else if(u4_total_mbs > MAX_MBS_LEVEL_42)
u4_level_idc = H264_LEVEL_5_0;
else if(u4_total_mbs > MAX_MBS_LEVEL_41)
u4_level_idc = H264_LEVEL_4_2;
else if(u4_total_mbs > MAX_MBS_LEVEL_40)
u4_level_idc = H264_LEVEL_4_1;
else if(u4_total_mbs > MAX_MBS_LEVEL_32)
u4_level_idc = H264_LEVEL_4_0;
else if(u4_total_mbs > MAX_MBS_LEVEL_31)
u4_level_idc = H264_LEVEL_3_2;
else if(u4_total_mbs > MAX_MBS_LEVEL_30)
u4_level_idc = H264_LEVEL_3_1;
else if(u4_total_mbs > MAX_MBS_LEVEL_21)
u4_level_idc = H264_LEVEL_3_0;
else if(u4_total_mbs > MAX_MBS_LEVEL_20)
u4_level_idc = H264_LEVEL_2_1;
else if(u4_total_mbs > MAX_MBS_LEVEL_10)
u4_level_idc = H264_LEVEL_2_0;
}
return (u4_level_idc);
}
WORD32 ih264d_parse_sps(dec_struct_t *ps_dec, dec_bit_stream_t *ps_bitstrm)
{
UWORD8 i;
dec_seq_params_t *ps_seq = NULL;
UWORD8 u1_profile_idc, u1_level_idc, u1_seq_parameter_set_id, u1_mb_aff_flag = 0;
UWORD16 i2_max_frm_num;
UWORD32 *pu4_bitstrm_buf = ps_bitstrm->pu4_buffer;
UWORD32 *pu4_bitstrm_ofst = &ps_bitstrm->u4_ofst;
UWORD8 u1_frm, uc_constraint_set0_flag, uc_constraint_set1_flag;
WORD32 i4_cropped_ht, i4_cropped_wd;
UWORD32 u4_temp;
WORD32 pic_height_in_map_units_minus1 = 0;
UWORD32 u2_pic_wd = 0;
UWORD32 u2_pic_ht = 0;
UWORD32 u2_frm_wd_y = 0;
UWORD32 u2_frm_ht_y = 0;
UWORD32 u2_frm_wd_uv = 0;
UWORD32 u2_frm_ht_uv = 0;
UWORD32 u2_crop_offset_y = 0;
UWORD32 u2_crop_offset_uv = 0;
WORD32 ret;
UWORD32 u4_num_reorder_frames;
/* High profile related syntax element */
WORD32 i4_i;
/* G050 */
UWORD8 u1_frame_cropping_flag, u1_frame_cropping_rect_left_ofst,
u1_frame_cropping_rect_right_ofst,
u1_frame_cropping_rect_top_ofst,
u1_frame_cropping_rect_bottom_ofst;
/* G050 */
/*--------------------------------------------------------------------*/
/* Decode seq_parameter_set_id and profile and level values */
/*--------------------------------------------------------------------*/
SWITCHONTRACE;
u1_profile_idc = ih264d_get_bits_h264(ps_bitstrm, 8);
COPYTHECONTEXT("SPS: profile_idc",u1_profile_idc);
/* G050 */
uc_constraint_set0_flag = ih264d_get_bit_h264(ps_bitstrm);
uc_constraint_set1_flag = ih264d_get_bit_h264(ps_bitstrm);
ih264d_get_bit_h264(ps_bitstrm);
/*****************************************************/
/* Read 5 bits for uc_constraint_set3_flag (1 bit) */
/* and reserved_zero_4bits (4 bits) - Sushant */
/*****************************************************/
ih264d_get_bits_h264(ps_bitstrm, 5);
/* G050 */
/* Check whether particular profile is suported or not */
/* Check whether particular profile is suported or not */
if((u1_profile_idc != MAIN_PROFILE_IDC) &&
(u1_profile_idc != BASE_PROFILE_IDC) &&
(u1_profile_idc != HIGH_PROFILE_IDC)
)
{
/* Apart from Baseline, main and high profile,
* only extended profile is supported provided
* uc_constraint_set0_flag or uc_constraint_set1_flag are set to 1
*/
if((u1_profile_idc != EXTENDED_PROFILE_IDC) ||
((uc_constraint_set1_flag != 1) && (uc_constraint_set0_flag != 1)))
{
return (ERROR_FEATURE_UNAVAIL);
}
}
u1_level_idc = ih264d_get_bits_h264(ps_bitstrm, 8);
COPYTHECONTEXT("SPS: u4_level_idc",u1_level_idc);
u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
if(u4_temp & MASK_ERR_SEQ_SET_ID)
return ERROR_INV_SPS_PPS_T;
u1_seq_parameter_set_id = u4_temp;
COPYTHECONTEXT("SPS: seq_parameter_set_id",
u1_seq_parameter_set_id);
/*--------------------------------------------------------------------*/
/* Find an seq param entry in seqparam array of decStruct */
/*--------------------------------------------------------------------*/
ps_seq = ps_dec->pv_scratch_sps_pps;
memset(ps_seq, 0, sizeof(dec_seq_params_t));
if(ps_dec->i4_header_decoded & 1)
{
*ps_seq = *ps_dec->ps_cur_sps;
}
if((ps_dec->i4_header_decoded & 1) && (ps_seq->u1_profile_idc != u1_profile_idc))
{
ps_dec->u1_res_changed = 1;
return IVD_RES_CHANGED;
}
if((ps_dec->i4_header_decoded & 1) && (ps_seq->u1_level_idc != u1_level_idc))
{
ps_dec->u1_res_changed = 1;
return IVD_RES_CHANGED;
}
ps_seq->u1_profile_idc = u1_profile_idc;
ps_seq->u1_level_idc = u1_level_idc;
ps_seq->u1_seq_parameter_set_id = u1_seq_parameter_set_id;
/*******************************************************************/
/* Initializations for high profile - Sushant */
/*******************************************************************/
ps_seq->i4_chroma_format_idc = 1;
ps_seq->i4_bit_depth_luma_minus8 = 0;
ps_seq->i4_bit_depth_chroma_minus8 = 0;
ps_seq->i4_qpprime_y_zero_transform_bypass_flag = 0;
ps_seq->i4_seq_scaling_matrix_present_flag = 0;
if(u1_profile_idc == HIGH_PROFILE_IDC)
{
/* reading chroma_format_idc */
ps_seq->i4_chroma_format_idc = ih264d_uev(pu4_bitstrm_ofst,
pu4_bitstrm_buf);
/* Monochrome is not supported */
if(ps_seq->i4_chroma_format_idc != 1)
{
return ERROR_INV_SPS_PPS_T;
}
/* reading bit_depth_luma_minus8 */
ps_seq->i4_bit_depth_luma_minus8 = ih264d_uev(pu4_bitstrm_ofst,
pu4_bitstrm_buf);
if(ps_seq->i4_bit_depth_luma_minus8 != 0)
{
return ERROR_INV_SPS_PPS_T;
}
/* reading bit_depth_chroma_minus8 */
ps_seq->i4_bit_depth_chroma_minus8 = ih264d_uev(pu4_bitstrm_ofst,
pu4_bitstrm_buf);
if(ps_seq->i4_bit_depth_chroma_minus8 != 0)
{
return ERROR_INV_SPS_PPS_T;
}
/* reading qpprime_y_zero_transform_bypass_flag */
ps_seq->i4_qpprime_y_zero_transform_bypass_flag =
(WORD32)ih264d_get_bit_h264(ps_bitstrm);
if(ps_seq->i4_qpprime_y_zero_transform_bypass_flag != 0)
{
return ERROR_INV_SPS_PPS_T;
}
/* reading seq_scaling_matrix_present_flag */
ps_seq->i4_seq_scaling_matrix_present_flag =
(WORD32)ih264d_get_bit_h264(ps_bitstrm);
if(ps_seq->i4_seq_scaling_matrix_present_flag)
{
for(i4_i = 0; i4_i < 8; i4_i++)
{
ps_seq->u1_seq_scaling_list_present_flag[i4_i] =
ih264d_get_bit_h264(ps_bitstrm);
/* initialize u1_use_default_scaling_matrix_flag[i4_i] to zero */
/* before calling scaling list */
ps_seq->u1_use_default_scaling_matrix_flag[i4_i] = 0;
if(ps_seq->u1_seq_scaling_list_present_flag[i4_i])
{
if(i4_i < 6)
{
ih264d_scaling_list(
ps_seq->i2_scalinglist4x4[i4_i],
16,
&ps_seq->u1_use_default_scaling_matrix_flag[i4_i],
ps_bitstrm);
}
else
{
ih264d_scaling_list(
ps_seq->i2_scalinglist8x8[i4_i - 6],
64,
&ps_seq->u1_use_default_scaling_matrix_flag[i4_i],
ps_bitstrm);
}
}
}
}
}
/*--------------------------------------------------------------------*/
/* Decode MaxFrameNum */
/*--------------------------------------------------------------------*/
u4_temp = 4 + ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
if(u4_temp > MAX_BITS_IN_FRAME_NUM)
{
return ERROR_INV_SPS_PPS_T;
}
ps_seq->u1_bits_in_frm_num = u4_temp;
COPYTHECONTEXT("SPS: log2_max_frame_num_minus4",
(ps_seq->u1_bits_in_frm_num - 4));
i2_max_frm_num = (1 << (ps_seq->u1_bits_in_frm_num));
ps_seq->u2_u4_max_pic_num_minus1 = i2_max_frm_num - 1;
/*--------------------------------------------------------------------*/
/* Decode picture order count and related values */
/*--------------------------------------------------------------------*/
u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
if(u4_temp > MAX_PIC_ORDER_CNT_TYPE)
{
return ERROR_INV_POC_TYPE_T;
}
ps_seq->u1_pic_order_cnt_type = u4_temp;
COPYTHECONTEXT("SPS: pic_order_cnt_type",ps_seq->u1_pic_order_cnt_type);
ps_seq->u1_num_ref_frames_in_pic_order_cnt_cycle = 1;
if(ps_seq->u1_pic_order_cnt_type == 0)
{
u4_temp = 4 + ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
if(u4_temp > MAX_BITS_IN_POC_LSB)
{
return ERROR_INV_SPS_PPS_T;
}
ps_seq->u1_log2_max_pic_order_cnt_lsb_minus = u4_temp;
ps_seq->i4_max_pic_order_cntLsb = (1 << u4_temp);
COPYTHECONTEXT("SPS: log2_max_pic_order_cnt_lsb_minus4",(u4_temp - 4));
}
else if(ps_seq->u1_pic_order_cnt_type == 1)
{
ps_seq->u1_delta_pic_order_always_zero_flag = ih264d_get_bit_h264(
ps_bitstrm);
COPYTHECONTEXT("SPS: delta_pic_order_always_zero_flag",
ps_seq->u1_delta_pic_order_always_zero_flag);
ps_seq->i4_ofst_for_non_ref_pic = ih264d_sev(pu4_bitstrm_ofst,
pu4_bitstrm_buf);
COPYTHECONTEXT("SPS: offset_for_non_ref_pic",
ps_seq->i4_ofst_for_non_ref_pic);
ps_seq->i4_ofst_for_top_to_bottom_field = ih264d_sev(
pu4_bitstrm_ofst, pu4_bitstrm_buf);
COPYTHECONTEXT("SPS: offset_for_top_to_bottom_field",
ps_seq->i4_ofst_for_top_to_bottom_field);
u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
if(u4_temp > 255)
return ERROR_INV_SPS_PPS_T;
ps_seq->u1_num_ref_frames_in_pic_order_cnt_cycle = u4_temp;
COPYTHECONTEXT("SPS: num_ref_frames_in_pic_order_cnt_cycle",
ps_seq->u1_num_ref_frames_in_pic_order_cnt_cycle);
for(i = 0; i < ps_seq->u1_num_ref_frames_in_pic_order_cnt_cycle; i++)
{
ps_seq->i4_ofst_for_ref_frame[i] = ih264d_sev(
pu4_bitstrm_ofst, pu4_bitstrm_buf);
COPYTHECONTEXT("SPS: offset_for_ref_frame",
ps_seq->i4_ofst_for_ref_frame[i]);
}
}
u4_temp = ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
if((u4_temp > H264_MAX_REF_PICS))
{
return ERROR_NUM_REF;
}
/* Compare with older num_ref_frames is header is already once */
if((ps_dec->i4_header_decoded & 1) && (ps_seq->u1_num_ref_frames != u4_temp))
{
ps_dec->u1_res_changed = 1;
return IVD_RES_CHANGED;
}
ps_seq->u1_num_ref_frames = u4_temp;
COPYTHECONTEXT("SPS: num_ref_frames",ps_seq->u1_num_ref_frames);
ps_seq->u1_gaps_in_frame_num_value_allowed_flag = ih264d_get_bit_h264(
ps_bitstrm);
COPYTHECONTEXT("SPS: gaps_in_frame_num_value_allowed_flag",
ps_seq->u1_gaps_in_frame_num_value_allowed_flag);
/*--------------------------------------------------------------------*/
/* Decode FrameWidth and FrameHeight and related values */
/*--------------------------------------------------------------------*/
ps_seq->u2_frm_wd_in_mbs = 1
+ ih264d_uev(pu4_bitstrm_ofst, pu4_bitstrm_buf);
COPYTHECONTEXT("SPS: pic_width_in_mbs_minus1",
ps_seq->u2_frm_wd_in_mbs - 1);
u2_pic_wd = (ps_seq->u2_frm_wd_in_mbs << 4);
pic_height_in_map_units_minus1 = ih264d_uev(pu4_bitstrm_ofst,
pu4_bitstrm_buf);
ps_seq->u2_frm_ht_in_mbs = 1 + pic_height_in_map_units_minus1;
u2_pic_ht = (ps_seq->u2_frm_ht_in_mbs << 4);
/*--------------------------------------------------------------------*/
/* Get the value of MaxMbAddress and Number of bits needed for it */
/*--------------------------------------------------------------------*/
ps_seq->u2_max_mb_addr = (ps_seq->u2_frm_wd_in_mbs
* ps_seq->u2_frm_ht_in_mbs) - 1;
ps_seq->u2_total_num_of_mbs = ps_seq->u2_max_mb_addr + 1;
ps_seq->u1_level_idc = ih264d_correct_level_idc(
u1_level_idc, ps_seq->u2_total_num_of_mbs);
u1_frm = ih264d_get_bit_h264(ps_bitstrm);
ps_seq->u1_frame_mbs_only_flag = u1_frm;
COPYTHECONTEXT("SPS: frame_mbs_only_flag", u1_frm);
if(!u1_frm)
u1_mb_aff_flag = ih264d_get_bit_h264(ps_bitstrm);
if((ps_dec->i4_header_decoded & 1)
&& (ps_seq->u1_mb_aff_flag != u1_mb_aff_flag))
{
ps_dec->u1_res_changed = 1;
return IVD_RES_CHANGED;
}
if(!u1_frm)
{
u2_pic_ht <<= 1;
ps_seq->u1_mb_aff_flag = u1_mb_aff_flag;
COPYTHECONTEXT("SPS: mb_adaptive_frame_field_flag",
ps_seq->u1_mb_aff_flag);
}
else
ps_seq->u1_mb_aff_flag = 0;
ps_seq->u1_direct_8x8_inference_flag = ih264d_get_bit_h264(ps_bitstrm);
COPYTHECONTEXT("SPS: direct_8x8_inference_flag",
ps_seq->u1_direct_8x8_inference_flag);
/* G050 */
u1_frame_cropping_flag = ih264d_get_bit_h264(ps_bitstrm);
COPYTHECONTEXT("SPS: frame_cropping_flag",u1_frame_cropping_flag);
if(u1_frame_cropping_flag)
{
u1_frame_cropping_rect_left_ofst = ih264d_uev(pu4_bitstrm_ofst,
pu4_bitstrm_buf);
COPYTHECONTEXT("SPS: frame_cropping_rect_left_offset",
u1_frame_cropping_rect_left_ofst);
u1_frame_cropping_rect_right_ofst = ih264d_uev(pu4_bitstrm_ofst,
pu4_bitstrm_buf);
COPYTHECONTEXT("SPS: frame_cropping_rect_right_offset",
u1_frame_cropping_rect_right_ofst);
u1_frame_cropping_rect_top_ofst = ih264d_uev(pu4_bitstrm_ofst,
pu4_bitstrm_buf);
COPYTHECONTEXT("SPS: frame_cropping_rect_top_offset",
u1_frame_cropping_rect_top_ofst);
u1_frame_cropping_rect_bottom_ofst = ih264d_uev(pu4_bitstrm_ofst,
pu4_bitstrm_buf);
COPYTHECONTEXT("SPS: frame_cropping_rect_bottom_offset",
u1_frame_cropping_rect_bottom_ofst);
}
/* G050 */
ps_seq->u1_vui_parameters_present_flag = ih264d_get_bit_h264(ps_bitstrm);
COPYTHECONTEXT("SPS: vui_parameters_present_flag",
ps_seq->u1_vui_parameters_present_flag);
u2_frm_wd_y = u2_pic_wd + (UWORD8)(PAD_LEN_Y_H << 1);
if(1 == ps_dec->u4_share_disp_buf)
{
if(ps_dec->u4_app_disp_width > u2_frm_wd_y)
u2_frm_wd_y = ps_dec->u4_app_disp_width;
}
u2_frm_ht_y = u2_pic_ht + (UWORD8)(PAD_LEN_Y_V << 2);
u2_frm_wd_uv = u2_pic_wd + (UWORD8)(PAD_LEN_UV_H << 2);
u2_frm_wd_uv = MAX(u2_frm_wd_uv, u2_frm_wd_y);
u2_frm_ht_uv = (u2_pic_ht >> 1) + (UWORD8)(PAD_LEN_UV_V << 2);
u2_frm_ht_uv = MAX(u2_frm_ht_uv, (u2_frm_ht_y >> 1));
/* Calculate display picture width, height and start u4_ofst from YUV420 */
/* pictute buffers as per cropping information parsed above */
{
UWORD16 u2_rgt_ofst = 0;
UWORD16 u2_lft_ofst = 0;
UWORD16 u2_top_ofst = 0;
UWORD16 u2_btm_ofst = 0;
UWORD8 u1_frm_mbs_flag;
UWORD8 u1_vert_mult_factor;
if(u1_frame_cropping_flag)
{
/* Calculate right and left u4_ofst for cropped picture */
u2_rgt_ofst = u1_frame_cropping_rect_right_ofst << 1;
u2_lft_ofst = u1_frame_cropping_rect_left_ofst << 1;
/* Know frame MBs only u4_flag */
u1_frm_mbs_flag = (1 == ps_seq->u1_frame_mbs_only_flag);
/* Simplify the vertical u4_ofst calculation from field/frame */
u1_vert_mult_factor = (2 - u1_frm_mbs_flag);
/* Calculate bottom and top u4_ofst for cropped picture */
u2_btm_ofst = (u1_frame_cropping_rect_bottom_ofst
<< u1_vert_mult_factor);
u2_top_ofst = (u1_frame_cropping_rect_top_ofst
<< u1_vert_mult_factor);
}
/* Calculate u4_ofst from start of YUV 420 picture buffer to start of*/
/* cropped picture buffer */
u2_crop_offset_y = (u2_frm_wd_y * u2_top_ofst) + (u2_lft_ofst);
u2_crop_offset_uv = (u2_frm_wd_uv * (u2_top_ofst >> 1))
+ (u2_lft_ofst >> 1) * YUV420SP_FACTOR;
/* Calculate the display picture width and height based on crop */
/* information */
i4_cropped_ht = u2_pic_ht - (u2_btm_ofst + u2_top_ofst);
i4_cropped_wd = u2_pic_wd - (u2_rgt_ofst + u2_lft_ofst);
if((i4_cropped_ht < MB_SIZE) || (i4_cropped_wd < MB_SIZE))
{
return ERROR_INV_SPS_PPS_T;
}
if((ps_dec->i4_header_decoded & 1) && (ps_dec->u2_pic_wd != u2_pic_wd))
{
ps_dec->u1_res_changed = 1;
return IVD_RES_CHANGED;
}
if((ps_dec->i4_header_decoded & 1) && (ps_dec->u2_disp_width != i4_cropped_wd))
{
ps_dec->u1_res_changed = 1;
return IVD_RES_CHANGED;
}
if((ps_dec->i4_header_decoded & 1) && (ps_dec->u2_pic_ht != u2_pic_ht))
{
ps_dec->u1_res_changed = 1;
return IVD_RES_CHANGED;
}
if((ps_dec->i4_header_decoded & 1) && (ps_dec->u2_disp_height != i4_cropped_ht))
{
ps_dec->u1_res_changed = 1;
return IVD_RES_CHANGED;
}
/* Check for unsupported resolutions */
if((u2_pic_wd > H264_MAX_FRAME_WIDTH) || (u2_pic_ht > H264_MAX_FRAME_HEIGHT))
{
return IVD_STREAM_WIDTH_HEIGHT_NOT_SUPPORTED;
}
/* If MBAff is enabled, decoder support is limited to streams with
* width less than half of H264_MAX_FRAME_WIDTH.
* In case of MBAff decoder processes two rows at a time
*/
if((u2_pic_wd << ps_seq->u1_mb_aff_flag) > H264_MAX_FRAME_WIDTH)
{
return IVD_STREAM_WIDTH_HEIGHT_NOT_SUPPORTED;
}
}
/* Backup u4_num_reorder_frames if header is already decoded */
if((ps_dec->i4_header_decoded & 1) &&
(1 == ps_seq->u1_vui_parameters_present_flag) &&
(1 == ps_seq->s_vui.u1_bitstream_restriction_flag))
{
u4_num_reorder_frames = ps_seq->s_vui.u4_num_reorder_frames;
}
else
{
u4_num_reorder_frames = -1;
}
if(1 == ps_seq->u1_vui_parameters_present_flag)
{
ret = ih264d_parse_vui_parametres(&ps_seq->s_vui, ps_bitstrm);
if(ret != OK)
return ret;
}
/* Compare older u4_num_reorder_frames with the new one if header is already decoded */
if((ps_dec->i4_header_decoded & 1) &&
(-1 != (WORD32)u4_num_reorder_frames) &&
(1 == ps_seq->u1_vui_parameters_present_flag) &&
(1 == ps_seq->s_vui.u1_bitstream_restriction_flag) &&
(ps_seq->s_vui.u4_num_reorder_frames != u4_num_reorder_frames))
{
ps_dec->u1_res_changed = 1;
return IVD_RES_CHANGED;
}
/* In case bitstream read has exceeded the filled size, then
return an error */
if (ps_bitstrm->u4_ofst > ps_bitstrm->u4_max_ofst)
{
return ERROR_INV_SPS_PPS_T;
}
/*--------------------------------------------------------------------*/
/* All initializations to ps_dec are beyond this point */
/*--------------------------------------------------------------------*/
ps_dec->u2_disp_height = i4_cropped_ht;
ps_dec->u2_disp_width = i4_cropped_wd;
ps_dec->u2_pic_wd = u2_pic_wd;
ps_dec->u2_pic_ht = u2_pic_ht;
/* Determining the Width and Height of Frame from that of Picture */
ps_dec->u2_frm_wd_y = u2_frm_wd_y;
ps_dec->u2_frm_ht_y = u2_frm_ht_y;
ps_dec->u2_frm_wd_uv = u2_frm_wd_uv;
ps_dec->u2_frm_ht_uv = u2_frm_ht_uv;
ps_dec->s_pad_mgr.u1_pad_len_y_v = (UWORD8)(PAD_LEN_Y_V << (1 - u1_frm));
ps_dec->s_pad_mgr.u1_pad_len_cr_v = (UWORD8)(PAD_LEN_UV_V << (1 - u1_frm));
ps_dec->u2_frm_wd_in_mbs = ps_seq->u2_frm_wd_in_mbs;
ps_dec->u2_frm_ht_in_mbs = ps_seq->u2_frm_ht_in_mbs;
ps_dec->u2_crop_offset_y = u2_crop_offset_y;
ps_dec->u2_crop_offset_uv = u2_crop_offset_uv;
ps_seq->u1_is_valid = TRUE;
ps_dec->ps_sps[u1_seq_parameter_set_id] = *ps_seq;
ps_dec->ps_cur_sps = &ps_dec->ps_sps[u1_seq_parameter_set_id];
return OK;
}
/*!
**************************************************************************
* \if Function name : ih264d_parse_end_of_sequence \endif
*
* \brief
* Decodes End of Sequence.
*
* \param ps_bitstrm : Pointer to bit ps_bitstrm containing the NAL unit
*
* \return
* 0 on Success and error code otherwise
**************************************************************************
*/
WORD32 ih264d_parse_end_of_sequence(dec_struct_t * ps_dec)
{
WORD32 ret;
ret = ih264d_end_of_pic_processing(ps_dec);
return ret;
}
/*!
**************************************************************************
* \if Function name : AcessUnitDelimiterRbsp \endif
*
* \brief
* Decodes AcessUnitDelimiterRbsp.
*
* \param ps_bitstrm : Pointer to bit ps_bitstrm containing the NAL unit
*
* \return
* 0 on Success and error code otherwise
**************************************************************************
*/
WORD32 ih264d_access_unit_delimiter_rbsp(dec_struct_t * ps_dec)
{
UWORD8 u1_primary_pic_type;
u1_primary_pic_type = ih264d_get_bits_h264(ps_dec->ps_bitstrm, 3);
switch(u1_primary_pic_type)
{
case I_PIC:
case SI_PIC:
case ISI_PIC:
ps_dec->ps_dec_err_status->u1_pic_aud_i = PIC_TYPE_I;
break;
default:
ps_dec->ps_dec_err_status->u1_pic_aud_i = PIC_TYPE_UNKNOWN;
}
return (0);
}
/*!
**************************************************************************
* \if Function name : ih264d_parse_nal_unit \endif
*
* \brief
* Decodes NAL unit
*
* \return
* 0 on Success and error code otherwise
**************************************************************************
*/
WORD32 ih264d_parse_nal_unit(iv_obj_t *dec_hdl,
ivd_video_decode_op_t *ps_dec_op,
UWORD8 *pu1_buf,
UWORD32 u4_length)
{
dec_bit_stream_t *ps_bitstrm;
dec_struct_t *ps_dec = (dec_struct_t *)dec_hdl->pv_codec_handle;
ivd_video_decode_ip_t *ps_dec_in =
(ivd_video_decode_ip_t *)ps_dec->pv_dec_in;
dec_slice_params_t * ps_cur_slice = ps_dec->ps_cur_slice;
UWORD8 u1_first_byte, u1_nal_ref_idc;
UWORD8 u1_nal_unit_type;
WORD32 i_status = OK;
ps_bitstrm = ps_dec->ps_bitstrm;
if(pu1_buf)
{
if(u4_length)
{
ps_dec_op->u4_frame_decoded_flag = 0;
ih264d_process_nal_unit(ps_dec->ps_bitstrm, pu1_buf,
u4_length);
SWITCHOFFTRACE;
u1_first_byte = ih264d_get_bits_h264(ps_bitstrm, 8);
if(NAL_FORBIDDEN_BIT(u1_first_byte))
{
H264_DEC_DEBUG_PRINT("\nForbidden bit set in Nal Unit, Let's try\n");
}
u1_nal_unit_type = NAL_UNIT_TYPE(u1_first_byte);
// if any other nal unit other than slice nal is encountered in between a
// frame break out of loop without consuming header
if ((ps_dec->u4_slice_start_code_found == 1)
&& (ps_dec->u1_pic_decode_done != 1)
&& (u1_nal_unit_type > IDR_SLICE_NAL))
{
return ERROR_INCOMPLETE_FRAME;
}
ps_dec->u1_nal_unit_type = u1_nal_unit_type;
u1_nal_ref_idc = (UWORD8)(NAL_REF_IDC(u1_first_byte));
//Skip all NALUs if SPS and PPS are not decoded
switch(u1_nal_unit_type)
{
case SLICE_DATA_PARTITION_A_NAL:
case SLICE_DATA_PARTITION_B_NAL:
case SLICE_DATA_PARTITION_C_NAL:
if(!ps_dec->i4_decode_header)
ih264d_parse_slice_partition(ps_dec, ps_bitstrm);
break;
case IDR_SLICE_NAL:
case SLICE_NAL:
/* ! */
DEBUG_THREADS_PRINTF("Decoding a slice NAL\n");
if(!ps_dec->i4_decode_header)
{
if(ps_dec->i4_header_decoded == 3)
{
/* ! */
ps_dec->u4_slice_start_code_found = 1;
ih264d_rbsp_to_sodb(ps_dec->ps_bitstrm);
i_status = ih264d_parse_decode_slice(
(UWORD8)(u1_nal_unit_type
== IDR_SLICE_NAL),
u1_nal_ref_idc, ps_dec);
if(i_status != OK)
{
return i_status;
}
}
else
{
H264_DEC_DEBUG_PRINT(
"\nSlice NAL Supplied but no header has been supplied\n");
}
}
break;
case SEI_NAL:
if(!ps_dec->i4_decode_header)
{
ih264d_rbsp_to_sodb(ps_dec->ps_bitstrm);
i_status = ih264d_parse_sei_message(ps_dec, ps_bitstrm);
if(i_status != OK)
return i_status;
ih264d_parse_sei(ps_dec, ps_bitstrm);
}
break;
case SEQ_PARAM_NAL:
/* ! */
ih264d_rbsp_to_sodb(ps_dec->ps_bitstrm);
i_status = ih264d_parse_sps(ps_dec, ps_bitstrm);
ps_dec->u4_sps_cnt_in_process++;
/*If a resolution change happens within a process call, due to multiple sps
* we will not support it.
*/
if((ps_dec->u4_sps_cnt_in_process > 1 ) &&
(i_status == IVD_RES_CHANGED))
{
i_status = ERROR_INV_SPS_PPS_T;
ps_dec->u1_res_changed = 0;
}
if(i_status == ERROR_INV_SPS_PPS_T)
return i_status;
if(!i_status)
ps_dec->i4_header_decoded |= 0x1;
break;
case PIC_PARAM_NAL:
/* ! */
ih264d_rbsp_to_sodb(ps_dec->ps_bitstrm);
i_status = ih264d_parse_pps(ps_dec, ps_bitstrm);
if(i_status == ERROR_INV_SPS_PPS_T)
return i_status;
if(!i_status)
ps_dec->i4_header_decoded |= 0x2;
break;
case ACCESS_UNIT_DELIMITER_RBSP:
if(!ps_dec->i4_decode_header)
{
ih264d_access_unit_delimiter_rbsp(ps_dec);
}
break;
//Let us ignore the END_OF_SEQ_RBSP NAL and decode even after this NAL
case END_OF_STREAM_RBSP:
if(!ps_dec->i4_decode_header)
{
ih264d_parse_end_of_stream(ps_dec);
}
break;
case FILLER_DATA_NAL:
if(!ps_dec->i4_decode_header)
{
ih264d_parse_filler_data(ps_dec, ps_bitstrm);
}
break;
default:
H264_DEC_DEBUG_PRINT("\nUnknown NAL type %d\n", u1_nal_unit_type);
break;
}
}
}
return i_status;
}