| /****************************************************************************** |
| * |
| * 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 Name : ih264d_sei.c */ |
| /* */ |
| /* Description : This file contains routines to parse SEI NAL's */ |
| /* */ |
| /* List of Functions : <List the functions defined in this file> */ |
| /* */ |
| /* Issues / Problems : None */ |
| /* */ |
| /* Revision History : */ |
| /* */ |
| /* DD MM YYYY Author(s) Changes (Describe the changes made) */ |
| /* 25 05 2005 NS Draft */ |
| /* */ |
| /*****************************************************************************/ |
| |
| #include "ih264_typedefs.h" |
| #include "ih264_macros.h" |
| #include "ih264_platform_macros.h" |
| #include "ih264d_sei.h" |
| #include "ih264d_bitstrm.h" |
| #include "ih264d_structs.h" |
| #include "ih264d_error_handler.h" |
| #include "ih264d_vui.h" |
| #include "ih264d_parse_cavlc.h" |
| #include "ih264d_defs.h" |
| |
| /*****************************************************************************/ |
| /* */ |
| /* Function Name : ih264d_parse_buffering_period */ |
| /* */ |
| /* Description : This function parses SEI message buffering_period */ |
| /* Inputs : ps_buf_prd pointer to struct buf_period_t */ |
| /* ps_bitstrm Bitstream */ |
| /* Globals : None */ |
| /* Processing : Parses SEI payload buffering period. */ |
| /* Outputs : None */ |
| /* Returns : None */ |
| /* */ |
| /* Issues : Not implemented fully */ |
| /* */ |
| /* Revision History: */ |
| /* */ |
| /* DD MM YYYY Author(s) Changes (Describe the changes made) */ |
| /* 06 05 2002 NS Draft */ |
| /* */ |
| /*****************************************************************************/ |
| |
| WORD32 ih264d_parse_buffering_period(buf_period_t *ps_buf_prd, |
| dec_bit_stream_t *ps_bitstrm, |
| dec_struct_t *ps_dec) |
| { |
| UWORD8 u1_seq_parameter_set_id; |
| dec_seq_params_t *ps_seq; |
| UWORD8 u1_nal_hrd_present, u1_vcl_hrd_present; |
| UWORD32 i; |
| UWORD32 *pu4_bitstrm_ofst = &ps_bitstrm->u4_ofst; |
| UWORD32 *pu4_bitstrm_buf = ps_bitstrm->pu4_buffer; |
| UNUSED(ps_buf_prd); |
| u1_seq_parameter_set_id = ih264d_uev(pu4_bitstrm_ofst, |
| pu4_bitstrm_buf); |
| if(u1_seq_parameter_set_id > MAX_NUM_SEQ_PARAMS) |
| return ERROR_INVALID_SEQ_PARAM; |
| ps_seq = &ps_dec->ps_sps[u1_seq_parameter_set_id]; |
| if(TRUE != ps_seq->u1_is_valid) |
| return (-1); |
| |
| ps_dec->ps_sei->u1_seq_param_set_id = u1_seq_parameter_set_id; |
| ps_dec->ps_cur_sps = ps_seq; |
| if(FALSE == ps_seq->u1_is_valid) |
| return ERROR_INVALID_SEQ_PARAM; |
| if(1 == ps_seq->u1_vui_parameters_present_flag) |
| { |
| u1_nal_hrd_present = ps_seq->s_vui.u1_nal_hrd_params_present; |
| if(u1_nal_hrd_present) |
| { |
| for(i = 0; i < ps_seq->s_vui.s_nal_hrd.u4_cpb_cnt; i++) |
| { |
| ih264d_get_bits_h264( |
| ps_bitstrm, |
| ps_seq->s_vui.s_nal_hrd.u1_initial_cpb_removal_delay); |
| ih264d_get_bits_h264( |
| ps_bitstrm, |
| ps_seq->s_vui.s_nal_hrd.u1_initial_cpb_removal_delay); |
| } |
| } |
| |
| u1_vcl_hrd_present = ps_seq->s_vui.u1_vcl_hrd_params_present; |
| if(u1_vcl_hrd_present) |
| { |
| for(i = 0; i < ps_seq->s_vui.s_vcl_hrd.u4_cpb_cnt; i++) |
| { |
| ih264d_get_bits_h264( |
| ps_bitstrm, |
| ps_seq->s_vui.s_vcl_hrd.u1_initial_cpb_removal_delay); |
| ih264d_get_bits_h264( |
| ps_bitstrm, |
| ps_seq->s_vui.s_vcl_hrd.u1_initial_cpb_removal_delay); |
| } |
| } |
| } |
| return OK; |
| } |
| |
| /*****************************************************************************/ |
| /* */ |
| /* Function Name : ih264d_parse_pic_timing */ |
| /* */ |
| /* Description : This function parses SEI message pic_timing */ |
| /* Inputs : ps_bitstrm Bitstream */ |
| /* ps_dec Poniter decoder context */ |
| /* ui4_payload_size pay load i4_size */ |
| /* Globals : None */ |
| /* Processing : Parses SEI payload picture timing */ |
| /* Outputs : None */ |
| /* Returns : None */ |
| /* */ |
| /* Issues : Not implemented fully */ |
| /* */ |
| /* Revision History: */ |
| /* */ |
| /* DD MM YYYY Author(s) Changes (Describe the changes made) */ |
| /* 06 05 2002 NS Draft */ |
| /* */ |
| /*****************************************************************************/ |
| WORD32 ih264d_parse_pic_timing(dec_bit_stream_t *ps_bitstrm, |
| dec_struct_t *ps_dec, |
| UWORD32 ui4_payload_size) |
| { |
| sei *ps_sei; |
| vui_t *ps_vu4; |
| UWORD8 u1_cpb_dpb_present; |
| UWORD8 u1_pic_struct_present_flag; |
| UWORD32 u4_start_offset, u4_bits_consumed; |
| UWORD8 u1_cpb_removal_delay_length, u1_dpb_output_delay_length; |
| |
| ps_sei = (sei *)ps_dec->ps_sei; |
| ps_vu4 = &ps_dec->ps_cur_sps->s_vui; |
| |
| u1_cpb_dpb_present = ps_vu4->u1_vcl_hrd_params_present |
| + ps_vu4->u1_nal_hrd_params_present; |
| |
| if(ps_vu4->u1_vcl_hrd_params_present) |
| { |
| u1_cpb_removal_delay_length = |
| ps_vu4->s_vcl_hrd.u1_cpb_removal_delay_length; |
| u1_dpb_output_delay_length = |
| ps_vu4->s_vcl_hrd.u1_dpb_output_delay_length; |
| } |
| else if(ps_vu4->u1_nal_hrd_params_present) |
| { |
| u1_cpb_removal_delay_length = |
| ps_vu4->s_nal_hrd.u1_cpb_removal_delay_length; |
| u1_dpb_output_delay_length = |
| ps_vu4->s_nal_hrd.u1_dpb_output_delay_length; |
| } |
| else |
| { |
| u1_cpb_removal_delay_length = 24; |
| u1_dpb_output_delay_length = 24; |
| |
| } |
| |
| u4_start_offset = ps_bitstrm->u4_ofst; |
| if(u1_cpb_dpb_present) |
| { |
| ih264d_get_bits_h264(ps_bitstrm, u1_cpb_removal_delay_length); |
| ih264d_get_bits_h264(ps_bitstrm, u1_dpb_output_delay_length); |
| } |
| |
| u1_pic_struct_present_flag = ps_vu4->u1_pic_struct_present_flag; |
| if(u1_pic_struct_present_flag) |
| { |
| ps_sei->u1_pic_struct = ih264d_get_bits_h264(ps_bitstrm, 4); |
| ps_dec->u1_pic_struct_copy = ps_sei->u1_pic_struct; |
| ps_sei->u1_is_valid = 1; |
| } |
| u4_bits_consumed = ps_bitstrm->u4_ofst - u4_start_offset; |
| ih264d_flush_bits_h264(ps_bitstrm, |
| (ui4_payload_size << 3) - u4_bits_consumed); |
| |
| return (0); |
| } |
| |
| /*****************************************************************************/ |
| /* */ |
| /* Function Name : ih264d_parse_recovery_point */ |
| /* */ |
| /* Description : This function parses SEI message recovery point */ |
| /* Inputs : ps_bitstrm Bitstream */ |
| /* ps_dec Poniter decoder context */ |
| /* ui4_payload_size pay load i4_size */ |
| /* Globals : None */ |
| /* Processing : Parses SEI payload picture timing */ |
| /* Outputs : None */ |
| /* Returns : None */ |
| /* */ |
| /* Issues : Not implemented fully */ |
| /* */ |
| /* Revision History: */ |
| /* */ |
| /* DD MM YYYY Author(s) Changes (Describe the changes made) */ |
| /* 06 05 2002 NS Draft */ |
| /* */ |
| /*****************************************************************************/ |
| WORD32 ih264d_parse_recovery_point(dec_bit_stream_t *ps_bitstrm, |
| dec_struct_t *ps_dec, |
| UWORD32 ui4_payload_size) |
| { |
| sei *ps_sei = ps_dec->ps_sei; |
| dec_err_status_t *ps_err = ps_dec->ps_dec_err_status; |
| UWORD32 *pu4_bitstrm_ofst = &ps_bitstrm->u4_ofst; |
| UWORD32 *pu4_bitstrm_buf = ps_bitstrm->pu4_buffer; |
| UNUSED(ui4_payload_size); |
| ps_sei->u2_recovery_frame_cnt = ih264d_uev(pu4_bitstrm_ofst, |
| pu4_bitstrm_buf); |
| ps_err->u4_frm_sei_sync = ps_err->u4_cur_frm |
| + ps_sei->u2_recovery_frame_cnt; |
| ps_sei->u1_exact_match_flag = ih264d_get_bit_h264(ps_bitstrm); |
| ps_sei->u1_broken_link_flag = ih264d_get_bit_h264(ps_bitstrm); |
| ps_sei->u1_changing_slice_grp_idc = ih264d_get_bits_h264(ps_bitstrm, 2); |
| |
| return (0); |
| } |
| |
| /*****************************************************************************/ |
| /* */ |
| /* Function Name : ih264d_parse_sei_payload */ |
| /* */ |
| /* Description : This function parses SEI pay loads. Currently it's */ |
| /* implemented partially. */ |
| /* Inputs : ps_bitstrm Bitstream */ |
| /* ui4_payload_type SEI payload type */ |
| /* ui4_payload_size SEI payload i4_size */ |
| /* Globals : None */ |
| /* Processing : Parses SEI payloads units and stores the info */ |
| /* Outputs : None */ |
| /* Returns : None */ |
| /* */ |
| /* Issues : Not implemented fully */ |
| /* */ |
| /* Revision History: */ |
| /* */ |
| /* DD MM YYYY Author(s) Changes (Describe the changes made) */ |
| /* 06 05 2002 NS Draft */ |
| /* */ |
| /*****************************************************************************/ |
| |
| WORD32 ih264d_parse_sei_payload(dec_bit_stream_t *ps_bitstrm, |
| UWORD32 ui4_payload_type, |
| UWORD32 ui4_payload_size, |
| dec_struct_t *ps_dec) |
| { |
| sei *ps_sei; |
| WORD32 i4_status = 0; |
| ps_sei = (sei *)ps_dec->ps_sei; |
| switch(ui4_payload_type) |
| { |
| case SEI_BUF_PERIOD: |
| |
| i4_status = ih264d_parse_buffering_period(&ps_sei->s_buf_period, |
| ps_bitstrm, ps_dec); |
| /*if(i4_status != OK) |
| return i4_status;*/ |
| break; |
| case SEI_PIC_TIMING: |
| if(NULL == ps_dec->ps_cur_sps) |
| ih264d_flush_bits_h264(ps_bitstrm, (ui4_payload_size << 3)); |
| else |
| ih264d_parse_pic_timing(ps_bitstrm, ps_dec, |
| ui4_payload_size); |
| break; |
| case SEI_RECOVERY_PT: |
| ih264d_parse_recovery_point(ps_bitstrm, ps_dec, |
| ui4_payload_size); |
| break; |
| default: |
| ih264d_flush_bits_h264(ps_bitstrm, (ui4_payload_size << 3)); |
| break; |
| } |
| return (i4_status); |
| } |
| |
| /*****************************************************************************/ |
| /* */ |
| /* Function Name : ih264d_parse_sei_message */ |
| /* */ |
| /* Description : This function is parses and decode SEI. Currently it's */ |
| /* not implemented fully. */ |
| /* Inputs : ps_dec Decoder parameters */ |
| /* ps_bitstrm Bitstream */ |
| /* Globals : None */ |
| /* Processing : Parses SEI NAL units and stores the info */ |
| /* Outputs : None */ |
| /* Returns : None */ |
| /* */ |
| /* Issues : Not implemented fully */ |
| /* */ |
| /* Revision History: */ |
| /* */ |
| /* DD MM YYYY Author(s) Changes (Describe the changes made) */ |
| /* 06 05 2002 NS Draft */ |
| /* */ |
| /*****************************************************************************/ |
| |
| WORD32 ih264d_parse_sei_message(dec_struct_t *ps_dec, |
| dec_bit_stream_t *ps_bitstrm) |
| { |
| UWORD32 ui4_payload_type, ui4_payload_size; |
| UWORD32 u4_bits; |
| WORD32 i4_status = 0; |
| |
| do |
| { |
| ui4_payload_type = 0; |
| |
| u4_bits = ih264d_get_bits_h264(ps_bitstrm, 8); |
| while(0xff == u4_bits) |
| { |
| u4_bits = ih264d_get_bits_h264(ps_bitstrm, 8); |
| ui4_payload_type += 255; |
| } |
| ui4_payload_type += u4_bits; |
| |
| ui4_payload_size = 0; |
| u4_bits = ih264d_get_bits_h264(ps_bitstrm, 8); |
| while(0xff == u4_bits) |
| { |
| u4_bits = ih264d_get_bits_h264(ps_bitstrm, 8); |
| ui4_payload_size += 255; |
| } |
| ui4_payload_size += u4_bits; |
| |
| i4_status = ih264d_parse_sei_payload(ps_bitstrm, ui4_payload_type, |
| ui4_payload_size, ps_dec); |
| if(i4_status == -1) |
| { |
| i4_status = 0; |
| break; |
| } |
| |
| if(i4_status != OK) |
| return i4_status; |
| |
| if(ih264d_check_byte_aligned(ps_bitstrm) == 0) |
| { |
| u4_bits = ih264d_get_bit_h264(ps_bitstrm); |
| if(0 == u4_bits) |
| { |
| H264_DEC_DEBUG_PRINT("\nError in parsing SEI message"); |
| } |
| while(0 == ih264d_check_byte_aligned(ps_bitstrm)) |
| { |
| u4_bits = ih264d_get_bit_h264(ps_bitstrm); |
| if(u4_bits) |
| { |
| H264_DEC_DEBUG_PRINT("\nError in parsing SEI message"); |
| } |
| } |
| } |
| } |
| while(ps_bitstrm->u4_ofst < ps_bitstrm->u4_max_ofst); |
| return (i4_status); |
| } |
| |
