| /****************************************************************************** |
| * |
| * 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 "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; |
| 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; |
| |
| 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; |
| *ps_seq = ps_dec->ps_sps[u1_seq_parameter_set_id]; |
| |
| if(NULL == ps_dec->ps_cur_sps) |
| ps_dec->ps_cur_sps = ps_seq; |
| |
| 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) |
| { |
| u2_pic_ht <<= 1; |
| ps_seq->u1_mb_aff_flag = ih264d_get_bit_h264(ps_bitstrm); |
| 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; |
| WORD32 i4_cropped_ht, i4_cropped_wd; |
| |
| 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_pic_ht != u2_pic_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; |
| } |
| |
| ps_dec->u2_disp_height = i4_cropped_ht; |
| |
| ps_dec->u2_disp_width = i4_cropped_wd; |
| |
| } |
| |
| /* 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; |
| } |
| |
| 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; |
| |
| /* 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; |
| } |
| ps_seq->u1_is_valid = TRUE; |
| ps_dec->ps_sps[u1_seq_parameter_set_id] = *ps_seq; |
| |
| 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; |
| |
| } |
| |
