| /****************************************************************************** |
| * |
| * 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 Includes */ |
| /*****************************************************************************/ |
| |
| /* System include files */ |
| #include "stdio.h" |
| #include "string.h" |
| |
| /* User include files */ |
| #include "irc_datatypes.h" |
| #include "irc_cntrl_param.h" |
| #include "irc_mem_req_and_acq.h" |
| #include "irc_picture_type.h" |
| #include "irc_trace_support.h" |
| |
| #define MAX_INTER_FRM_INT 10 |
| |
| /******************************Pic_details ************************************/ |
| typedef struct |
| { |
| /* The id sent by the codec */ |
| WORD32 i4_pic_id; |
| |
| /* The pics come in, in this order */ |
| WORD32 i4_pic_disp_order_no; |
| |
| /* I,P,B */ |
| picture_type_e e_pic_type; |
| |
| } pic_details_t; |
| |
| /**************************Pic_handling structure *****************************/ |
| typedef struct pic_handling_t |
| { |
| /*************************************************************************** |
| * Inputs from the codec |
| **************************************************************************/ |
| |
| /* Number of frames after which an I frame will repeat in display order */ |
| WORD32 i4_intra_frm_int; |
| |
| /* (num_b_pics_in_subgop + 1) */ |
| WORD32 i4_inter_frm_int; |
| |
| /* After these many buffered frames, the pics are encoded */ |
| WORD32 i4_max_inter_frm_int; |
| |
| /* OPEN or CLOSED */ |
| WORD32 i4_is_gop_closed; |
| |
| /* The pic stack */ |
| /* Stack used to store the input pics in encode order */ |
| pic_details_t as_pic_stack[MAX_INTER_FRM_INT + 2]; |
| |
| /*************************************************************************** |
| * Counters |
| **************************************************************************/ |
| |
| /* Decides whether a B or ref pic */ |
| WORD32 i4_buf_pic_no; |
| |
| /* Current pic's number in displayed, and gets reset after an I-frm */ |
| WORD32 i4_pic_disp_order_no; |
| |
| /* Number of P frms that have come, in the current gop, so far */ |
| WORD32 i4_p_count_in_gop; |
| |
| /* Number of B frms that have come, in the current gop, so far */ |
| WORD32 i4_b_count_in_gop; |
| |
| /* Number of B frms that have come, in the current subgop, so far */ |
| WORD32 i4_b_count_in_subgop; |
| |
| /*************************************************************************** |
| * Indices to the pic stack (Since we store the pics in the encode order, |
| * these vars are modified to meet that) |
| **************************************************************************/ |
| |
| /* B_PIC index */ |
| WORD32 i4_b_pic_idx; |
| |
| /* I,P PIC index */ |
| WORD32 i4_ref_pic_idx; |
| |
| /*************************************************************************** |
| * Variables operating on the input pics |
| **************************************************************************/ |
| |
| /* Flag denoting whether it's the first gop or not */ |
| WORD32 i4_is_first_gop; |
| |
| /* Number of B_PICs in an incomplete subgop */ |
| WORD32 i4_b_in_incomp_subgop; |
| |
| /* In CLOSED_GOPs, even if inter_frm_int > 1, there can be 2 continous |
| * P_PICs at the GOP end. This takes values of 0 or 1 */ |
| WORD32 i4_extra_p; |
| |
| /*************************************************************************** |
| * Arrays storing the number of frms in the gop |
| **************************************************************************/ |
| |
| /* In the steady state, what's the pic distribution in display order */ |
| WORD32 i4_frms_in_gop[MAX_PIC_TYPE]; |
| |
| /* |
| * In case of a change in inter frm int call, the pic distribution in |
| * that gop in display order |
| */ |
| WORD32 i4_frms_in_cur_gop[MAX_PIC_TYPE]; |
| |
| /* |
| * This is used to denote the number of frms remaining to be encoded in the |
| * current gop |
| */ |
| WORD32 i4_rem_frms_in_gop[MAX_PIC_TYPE]; |
| |
| /*************************************************************************** |
| * Variables operating on the output pics |
| **************************************************************************/ |
| |
| /* Counts the frms encoded in a gop */ |
| WORD32 i4_coded_pic_no; |
| |
| /* Counts from the start of stack to the end repeatedly */ |
| WORD32 i4_stack_count; |
| |
| /*************************************************************************** |
| * Tracking a change in the inputs from the codec |
| **************************************************************************/ |
| |
| /* A flag that is set when the codec calls for a change in inter_frm_int */ |
| WORD32 i4_change_in_inter_frm_int; |
| |
| /* |
| * When a change_in_inter_frm_int is called, this stores the new |
| * inter_frm_int |
| */ |
| WORD32 i4_new_inter_frm_int; |
| |
| /* |
| * When a change_in_inter_frm_int is called in the middle of a gop,this |
| * stores the B_PICs in the incomplete subgop of the mixed gop |
| */ |
| WORD32 i4_b_in_incomp_subgop_mix_gop; |
| |
| /* |
| * For a CLOSED GOP, when a change_in_inter_frm_int is called in the middle |
| * of a gop,this is a flag denoting if there is an extra P_PIC in the mixed |
| * gop |
| */ |
| WORD32 i4_extra_p_mix_gop; |
| |
| /* A flag that is set when the codec calls for a change in intra_frm_int */ |
| WORD32 i4_change_in_intra_frm_int; |
| |
| /* |
| * When a change_in_intra_frm_int is called, this stores the new |
| * intra_frm_int |
| */ |
| WORD32 i4_new_intra_frm_int; |
| |
| /*************************************************************************** |
| * Previous pic_stack_indices & details |
| **************************************************************************/ |
| pic_details_t s_prev_pic_details; |
| |
| WORD32 i4_prev_b_pic_idx; |
| |
| WORD32 i4_last_frm_in_gop; |
| |
| WORD32 i4_first_gop_encoded; |
| |
| /* NITT TBR */ |
| picture_type_e e_previous_pic_type; |
| |
| WORD32 i4_force_I_frame; |
| |
| WORD32 i4_forced_I_frame_cur_frame; |
| |
| WORD32 i4_sum_remaining_frm_in_gop; |
| |
| WORD32 i4_mod_temp_ref_cnt; |
| |
| WORD32 i4_frames_in_fif_gop; |
| |
| WORD32 i4_prev_intra_frame_interval; |
| |
| } pic_handling_t; |
| |
| static void irc_update_pic_distbn(pic_handling_t *ps_pic_handling, |
| WORD32 i4_intra_frm_int, |
| WORD32 i4_inter_frm_int, |
| WORD32 i4_gop_boundary); |
| |
| static void find_pic_distbn_in_gop(WORD32 i4_frms_in_gop[MAX_PIC_TYPE], |
| WORD32 i4_intra_frm_int, |
| WORD32 i4_inter_frm_int, |
| WORD32 i4_is_gop_closed, |
| WORD32 *pi4_b_in_incomp_subgop, |
| WORD32 *pi4_extra_p); |
| |
| WORD32 irc_pic_handling_num_fill_use_free_memtab(pic_handling_t **pps_pic_handling, |
| itt_memtab_t *ps_memtab, |
| ITT_FUNC_TYPE_E e_func_type) |
| { |
| WORD32 i4_mem_tab_idx = 0; |
| pic_handling_t s_pic_handling_temp; |
| |
| /* |
| * Hack for al alloc, during which we dont have any state memory. |
| * Dereferencing can cause issues |
| */ |
| if(e_func_type == GET_NUM_MEMTAB || e_func_type == FILL_MEMTAB) |
| { |
| (*pps_pic_handling) = &s_pic_handling_temp; |
| } |
| |
| /*for src rate control state structure*/ |
| if(e_func_type != GET_NUM_MEMTAB) |
| { |
| fill_memtab(&ps_memtab[i4_mem_tab_idx], sizeof(pic_handling_t), |
| ALIGN_128_BYTE, PERSISTENT, DDR); |
| use_or_fill_base(&ps_memtab[0], (void**)pps_pic_handling, e_func_type); |
| } |
| i4_mem_tab_idx++; |
| |
| return (i4_mem_tab_idx); |
| } |
| |
| /****************************************************************************** |
| Description : initializes the pic handling state struct |
| *****************************************************************************/ |
| void irc_init_pic_handling(pic_handling_t *ps_pic_handling, |
| WORD32 i4_intra_frm_int, |
| WORD32 i4_inter_frm_int, |
| WORD32 i4_max_inter_frm_int, |
| WORD32 i4_is_gop_closed) |
| { |
| /* Declarations */ |
| WORD32 i; |
| |
| /* Checks */ |
| /* Codec Parameters */ |
| ps_pic_handling->i4_intra_frm_int = i4_intra_frm_int; |
| ps_pic_handling->i4_inter_frm_int = i4_inter_frm_int; |
| ps_pic_handling->i4_max_inter_frm_int = i4_max_inter_frm_int; |
| ps_pic_handling->i4_is_gop_closed = i4_is_gop_closed; |
| |
| /* Pic_stack */ |
| memset(ps_pic_handling->as_pic_stack, 0, |
| sizeof(ps_pic_handling->as_pic_stack)); |
| memset(&ps_pic_handling->s_prev_pic_details, 0, |
| sizeof(ps_pic_handling->s_prev_pic_details)); |
| |
| /* Counters */ |
| ps_pic_handling->i4_buf_pic_no = 0; |
| ps_pic_handling->i4_pic_disp_order_no = 0; |
| |
| /* Indices to the pic_stack */ |
| ps_pic_handling->i4_ref_pic_idx = 0; |
| /* |
| * B frame index should be ref_frame_num, |
| * which is 2 in out case |
| */ |
| ps_pic_handling->i4_b_pic_idx = 2; |
| ps_pic_handling->i4_prev_b_pic_idx = 2; |
| |
| /* Variables working on the input frames */ |
| ps_pic_handling->i4_is_first_gop = 1; |
| ps_pic_handling->i4_p_count_in_gop = 0; |
| ps_pic_handling->i4_b_count_in_gop = 0; |
| ps_pic_handling->i4_b_count_in_subgop = 0; |
| |
| /* Variables working on the output frames */ |
| ps_pic_handling->i4_coded_pic_no = -1; |
| ps_pic_handling->i4_stack_count = -1; |
| |
| /* Tracks the changes in the Codec Parameters */ |
| ps_pic_handling->i4_change_in_inter_frm_int = 0; |
| ps_pic_handling->i4_new_inter_frm_int = i4_max_inter_frm_int; |
| |
| /* Tracks the changes in the Codec Parameters */ |
| ps_pic_handling->i4_change_in_intra_frm_int = 0; |
| ps_pic_handling->i4_new_intra_frm_int = i4_intra_frm_int; |
| |
| /* Variables on which the bit allocation is dependent */ |
| /* Get the pic distribution in the gop */ |
| find_pic_distbn_in_gop(ps_pic_handling->i4_frms_in_gop, i4_intra_frm_int, |
| i4_inter_frm_int, i4_is_gop_closed, |
| &ps_pic_handling->i4_b_in_incomp_subgop, |
| &ps_pic_handling->i4_extra_p); |
| |
| for(i = 0; i < MAX_PIC_TYPE; i++) |
| { |
| ps_pic_handling->i4_frms_in_cur_gop[i] = |
| ps_pic_handling->i4_frms_in_gop[i]; |
| ps_pic_handling->i4_rem_frms_in_gop[i] = |
| ps_pic_handling->i4_frms_in_gop[i]; |
| } |
| |
| ps_pic_handling->e_previous_pic_type = I_PIC; |
| ps_pic_handling->i4_prev_intra_frame_interval = i4_intra_frm_int; |
| ps_pic_handling->i4_force_I_frame = 0; |
| ps_pic_handling->i4_forced_I_frame_cur_frame = 0; |
| ps_pic_handling->i4_sum_remaining_frm_in_gop = 0; |
| ps_pic_handling->i4_mod_temp_ref_cnt = 0; |
| |
| ps_pic_handling->i4_b_in_incomp_subgop_mix_gop = |
| ps_pic_handling->i4_b_in_incomp_subgop; |
| ps_pic_handling->i4_extra_p_mix_gop = ps_pic_handling->i4_extra_p; |
| |
| ps_pic_handling->i4_last_frm_in_gop = 0; |
| ps_pic_handling->i4_first_gop_encoded = 0; |
| ps_pic_handling->i4_frames_in_fif_gop = 0; |
| |
| } |
| |
| /******************************************************************************* |
| * @brief registers the new intra frame interval value |
| ******************************************************************************/ |
| void irc_pic_handling_register_new_int_frm_interval(pic_handling_t *ps_pic_handling, |
| WORD32 i4_intra_frm_int) |
| { |
| ps_pic_handling->i4_change_in_intra_frm_int = 1; |
| ps_pic_handling->i4_new_intra_frm_int = i4_intra_frm_int; |
| } |
| |
| void irc_pic_handling_register_new_inter_frm_interval(pic_handling_t *ps_pic_handling, |
| WORD32 i4_inter_frm_int) |
| { |
| /* Update the state structure with the latest values */ |
| ps_pic_handling->i4_change_in_inter_frm_int = 1; |
| ps_pic_handling->i4_new_inter_frm_int = i4_inter_frm_int; |
| } |
| |
| static void start_new_gop(pic_handling_t *ps_pic_handling) |
| { |
| WORD32 i; |
| WORD32 i4_sum_remaining_frm_in_gop = 0; |
| |
| /* Now, the end of gop updates */ |
| ps_pic_handling->i4_pic_disp_order_no = 0; |
| ps_pic_handling->i4_buf_pic_no = 0; |
| ps_pic_handling->i4_is_first_gop = 0; |
| ps_pic_handling->i4_extra_p_mix_gop = ps_pic_handling->i4_extra_p; |
| |
| if(ps_pic_handling->i4_is_gop_closed) |
| { |
| ps_pic_handling->i4_b_in_incomp_subgop_mix_gop = |
| ps_pic_handling->i4_b_in_incomp_subgop; |
| } |
| /* |
| * Store the number of frames in the gop that is encoded till now |
| * just before Force I frame call is made |
| */ |
| ps_pic_handling->i4_frames_in_fif_gop = ps_pic_handling->i4_b_count_in_gop |
| + ps_pic_handling->i4_p_count_in_gop + 1; |
| for(i = 0; i < MAX_PIC_TYPE; i++) |
| { |
| i4_sum_remaining_frm_in_gop += ps_pic_handling->i4_rem_frms_in_gop[i]; |
| } |
| ps_pic_handling->i4_sum_remaining_frm_in_gop = i4_sum_remaining_frm_in_gop; |
| for(i = 0; i < MAX_PIC_TYPE; i++) |
| { |
| ps_pic_handling->i4_frms_in_cur_gop[i] = |
| ps_pic_handling->i4_frms_in_gop[i]; |
| ps_pic_handling->i4_rem_frms_in_gop[i] = |
| ps_pic_handling->i4_frms_in_cur_gop[i]; |
| } |
| } |
| |
| /******************************************************************************* |
| * @brief Fills the pic_stack with the incoming pics in encode order |
| ******************************************************************************/ |
| void irc_add_pic_to_stack(pic_handling_t *ps_pic_handling, WORD32 i4_enc_pic_id) |
| { |
| /* Declarations */ |
| WORD32 i4_inter_frm_int, i4_max_inter_frm_int, |
| i4_intra_frm_int, i4_new_inter_frm_int; |
| WORD32 i4_is_gop_closed; |
| WORD32 i4_buf_pic_no, i4_pic_disp_order_no; |
| WORD32 i4_b_pic_idx, i4_ref_pic_idx; |
| WORD32 i4_is_first_gop, i4_b_in_incomp_subgop, i4_p_count_in_gop, |
| i4_b_count_in_gop, i4_b_count_in_subgop; |
| WORD32 i, i4_p_frms_in_prd, i4_b_frms_in_prd, |
| i4_num_b_in_subgop, i4_extra_p; |
| WORD32 i4_condn_for_change_in_inter_frm_int; |
| picture_type_e e_previous_pic_type, e_cur_pic_type; |
| WORD32 i4_force_I_frame; |
| |
| /* |
| * Initialize the local vars with the state struct values needed by the |
| * change calls |
| */ |
| i4_intra_frm_int = ps_pic_handling->i4_intra_frm_int; |
| i4_inter_frm_int = ps_pic_handling->i4_inter_frm_int; |
| i4_max_inter_frm_int = ps_pic_handling->i4_max_inter_frm_int; |
| i4_is_gop_closed = ps_pic_handling->i4_is_gop_closed; |
| |
| i4_buf_pic_no = ps_pic_handling->i4_buf_pic_no; |
| i4_pic_disp_order_no = ps_pic_handling->i4_pic_disp_order_no; |
| i4_b_count_in_gop = ps_pic_handling->i4_b_count_in_gop; |
| i4_b_frms_in_prd = ps_pic_handling->i4_frms_in_cur_gop[B_PIC]; |
| i4_is_first_gop = ps_pic_handling->i4_is_first_gop; |
| i4_new_inter_frm_int = ps_pic_handling->i4_new_inter_frm_int; |
| e_previous_pic_type = ps_pic_handling->e_previous_pic_type; |
| i4_force_I_frame = ps_pic_handling->i4_force_I_frame; |
| |
| /* Force I frame : |
| * Two different cases |
| * 1)OPEN_GOP: New GOP is started after number of B pictures in the last |
| * sub gop of a gop to mimic the GOP structure. |
| * 2)Closed GOP:Wait till P frame at input and The frame after a P frame |
| * a new GOP is started to mimic the GOP structure. |
| */ |
| if(i4_force_I_frame) |
| { |
| WORD32 i4_temp_is_gop_closed; |
| WORD32 i4_codn = 0; |
| /* A special case of Open GOP where the it behaves like Closed GOP*/ |
| if((i4_intra_frm_int % i4_inter_frm_int) == 1) |
| { |
| i4_temp_is_gop_closed = 1; |
| } |
| else |
| { |
| i4_temp_is_gop_closed = i4_is_gop_closed; |
| } |
| /* Get the current picture type to aid decision to force an I frame*/ |
| if((i4_buf_pic_no % i4_inter_frm_int) |
| && !(i4_is_gop_closed&& (i4_b_count_in_gop == i4_b_frms_in_prd))) |
| { |
| e_cur_pic_type = B_PIC; |
| } |
| else |
| { |
| if(i4_pic_disp_order_no == 0) |
| { |
| e_cur_pic_type = I_PIC; |
| } |
| else |
| { |
| e_cur_pic_type = P_PIC; |
| } |
| } |
| if((i4_intra_frm_int % i4_inter_frm_int) == 0) |
| { |
| i4_codn = (e_cur_pic_type == P_PIC); |
| } |
| else |
| { |
| i4_codn = (ps_pic_handling->i4_b_count_in_subgop |
| == ps_pic_handling->i4_b_in_incomp_subgop); |
| } |
| if(e_cur_pic_type == I_PIC) |
| { |
| /* |
| * Don't do anything. Resetting the force I frame flag |
| * since the current picture type is already a I frame |
| */ |
| i4_force_I_frame = 0; |
| } |
| else if(i4_inter_frm_int == 1) |
| { |
| /*IPP case , Force I frame immediately*/ |
| start_new_gop(ps_pic_handling); |
| } |
| else if((!i4_temp_is_gop_closed) && i4_codn) |
| { |
| start_new_gop(ps_pic_handling); |
| if(ps_pic_handling->i4_b_count_in_subgop) |
| { |
| ps_pic_handling->i4_b_pic_idx += 1; |
| ps_pic_handling->i4_b_pic_idx %= (i4_max_inter_frm_int + 1); |
| } |
| } |
| else if(i4_temp_is_gop_closed && (e_previous_pic_type == P_PIC) |
| && (e_cur_pic_type != P_PIC)) |
| { |
| start_new_gop(ps_pic_handling); |
| ps_pic_handling->i4_b_pic_idx++; |
| ps_pic_handling->i4_b_pic_idx %= (i4_max_inter_frm_int + 1); |
| } |
| i4_is_first_gop = ps_pic_handling->i4_is_first_gop; |
| } |
| |
| |
| /***********************CHANGE_INTRA_FRM_INTERVAL************************** |
| * |
| * Call the irc_update_pic_distbn if |
| * 1)Change in intra frm interval flag is set |
| * 2)It's the first B_PIC of a gop |
| */ |
| if((ps_pic_handling->i4_change_in_intra_frm_int == 1) |
| && ((i4_pic_disp_order_no == 1))) |
| { |
| irc_update_pic_distbn(ps_pic_handling, |
| ps_pic_handling->i4_new_intra_frm_int, |
| ps_pic_handling->i4_inter_frm_int, 1); |
| |
| ps_pic_handling->i4_change_in_intra_frm_int = 0; |
| |
| if(ps_pic_handling->i4_new_intra_frm_int == 1) |
| { |
| ps_pic_handling->i4_pic_disp_order_no = 0; |
| } |
| } |
| /*********************CHANGE_INTER_FRM_INTERVAL****************************/ |
| /* Call irc_update_pic_distbn if |
| * 1)Change in inter frm interval flag is set |
| * 2)It's the first B_PIC after gop/subgop start, and |
| * 3)The new inter-frm-interval won't cross the intra_frm_interval |
| */ |
| if((ps_pic_handling->i4_change_in_inter_frm_int == 1) |
| && ((i4_buf_pic_no % i4_inter_frm_int == 1)|| (i4_pic_disp_order_no == 1) || (i4_inter_frm_int == 1))) |
| { |
| /* |
| * Condition which checks if the new inter_frm_int will cross the |
| * intra_frm_int |
| */ |
| i4_condn_for_change_in_inter_frm_int = ((i4_pic_disp_order_no |
| + i4_new_inter_frm_int - 1) < i4_intra_frm_int); |
| |
| if(i4_condn_for_change_in_inter_frm_int) |
| { |
| /* |
| * If there is a change in inter frame interval. We should set the b |
| * frame IDX to the (num ref frame - num ref frame in buf)+ i4_ref_pic_idx |
| * Since our case we have a structure of I B P or I B...B P only |
| * we have three cases |
| * 1) current incoming frame is I. Then we have to leave space for |
| * current I and next P hence write b idx as to ref idx + 2 |
| * 2) Current incoming frame is B. In that case, we have I in buffer. |
| * Only one P needs space hence write b idx as ref idx +1 |
| * 3) Current incoming frame is P. In that case we are at the end of |
| * gop [sub gop?] and we have to leave space for next gops I and P. |
| * Thus b idx = ref idx + 2 |
| * |
| * In case of an closed Gop. The last frame has to be forced to be a P. |
| * Hence we may have problems in that case. |
| * |
| * Also this has the implicit assumption of only 2 ref frames |
| */ |
| WORD32 i4_is_curr_frm_b = (i4_buf_pic_no % i4_new_inter_frm_int)&& |
| !(i4_is_gop_closed && (i4_b_count_in_gop == i4_b_frms_in_prd)); |
| |
| /*If the inter_frm_int = 1, then the b_pic_idx needs to be modified */ |
| if(i4_inter_frm_int == 1) |
| { |
| ps_pic_handling->i4_b_pic_idx = ((i4_is_curr_frm_b ? 1 : 2) |
| + ps_pic_handling->i4_ref_pic_idx) |
| % (i4_max_inter_frm_int + 1); |
| } |
| |
| /* |
| * Depending on the gop/subgop boundary, call the change_inter_frm_int |
| * |
| * TO DO: make a single call, change the name of the fxn to |
| * update_state, |
| * where state = frms_in_gop + b_incomp_subgop + extra_p |
| */ |
| |
| /* GOP boundary */ |
| if(i4_pic_disp_order_no == 1) |
| { |
| irc_update_pic_distbn(ps_pic_handling, |
| ps_pic_handling->i4_intra_frm_int, |
| ps_pic_handling->i4_new_inter_frm_int, 1); |
| } |
| /* Subgop boundary */ |
| else |
| { |
| irc_update_pic_distbn(ps_pic_handling, |
| ps_pic_handling->i4_intra_frm_int, |
| ps_pic_handling->i4_new_inter_frm_int, 0); |
| } |
| |
| ps_pic_handling->i4_change_in_inter_frm_int = 0; |
| ps_pic_handling->i4_new_inter_frm_int = |
| ps_pic_handling->i4_inter_frm_int; |
| } |
| |
| } |
| |
| /* Initialize the local vars with the state struct values */ |
| i4_buf_pic_no = ps_pic_handling->i4_buf_pic_no; |
| i4_pic_disp_order_no = ps_pic_handling->i4_pic_disp_order_no; |
| i4_b_pic_idx = ps_pic_handling->i4_b_pic_idx; |
| i4_ref_pic_idx = ps_pic_handling->i4_ref_pic_idx; |
| i4_b_in_incomp_subgop = ps_pic_handling->i4_b_in_incomp_subgop_mix_gop; |
| i4_p_count_in_gop = ps_pic_handling->i4_p_count_in_gop; |
| i4_b_count_in_gop = ps_pic_handling->i4_b_count_in_gop; |
| i4_b_count_in_subgop = ps_pic_handling->i4_b_count_in_subgop; |
| i4_p_frms_in_prd = ps_pic_handling->i4_frms_in_cur_gop[P_PIC]; |
| i4_b_frms_in_prd = ps_pic_handling->i4_frms_in_cur_gop[B_PIC]; |
| i4_extra_p = ps_pic_handling->i4_extra_p_mix_gop; |
| i4_inter_frm_int = ps_pic_handling->i4_inter_frm_int; |
| i4_intra_frm_int = ps_pic_handling->i4_intra_frm_int; |
| |
| /* Initializing the prev_state vars */ |
| ps_pic_handling->i4_prev_b_pic_idx = ps_pic_handling->i4_b_pic_idx; |
| |
| i4_num_b_in_subgop = (i4_inter_frm_int - 1); |
| |
| /*********************** Fill the stack ***********************************/ |
| /* The next part of the code is organized as |
| * |
| * if(B_PIC conditions satisfied) |
| * { |
| * Fill the pic_stack using the b_pic_index |
| * Update the b_pic_index and the other b_pic related vars for the |
| * next B_PIC |
| * } |
| * else |
| * { |
| * if(I_PIC conditions are satisfied) |
| * { |
| * Fill the pic_stack using the ref_pic_index |
| * Update the ref_pic_index and the other ref_pic related vars for the next |
| * I_PIC/P_PIC |
| * } |
| * else |
| * { |
| * Fill the pic_stack using the ref_pic_index |
| * Update the ref_pic_index and the other ref_pic related vars for the next |
| * I_PIC/P_PIC |
| * } |
| * } |
| */ |
| /* |
| * Condition for a B_PIC - |
| * 1) Other than the first I_PIC and the periodically appearing P_PICs, after |
| * every inter_frm_int, rest all pics are B_PICs |
| * 2) In case of CLOSED_GOP, the last frame of the gop has to be a P_PIC |
| */ |
| |
| if((i4_buf_pic_no % i4_inter_frm_int)&& !(i4_is_gop_closed |
| && (i4_b_count_in_gop == i4_b_frms_in_prd))) /**** B_PIC ****/ |
| { |
| /* Fill the pic_stack */ |
| ps_pic_handling->as_pic_stack[i4_b_pic_idx].i4_pic_id = i4_enc_pic_id; |
| ps_pic_handling->as_pic_stack[i4_b_pic_idx].e_pic_type = B_PIC; |
| ps_pic_handling->as_pic_stack[i4_b_pic_idx].i4_pic_disp_order_no = |
| i4_pic_disp_order_no; |
| |
| /* Store Pic type*/ |
| e_previous_pic_type = B_PIC; |
| |
| /* Update the prev_pic_details */ |
| memcpy(&ps_pic_handling->s_prev_pic_details, |
| &ps_pic_handling->as_pic_stack[i4_b_pic_idx], |
| sizeof(pic_details_t)); |
| |
| i4_b_count_in_gop++; |
| i4_b_count_in_subgop++; |
| |
| /* Update the i4_b_pic_idx */ |
| if(!i4_is_gop_closed) |
| { |
| /* If this B_PIC features in one of the complete subgops */ |
| if((i4_b_count_in_subgop < i4_num_b_in_subgop) |
| && !(i4_b_count_in_gop == i4_b_frms_in_prd)) |
| { |
| i4_b_pic_idx++; |
| } |
| else /* Else if this B_PIC is the last one in a subgop or gop */ |
| { |
| /* |
| * If this is the last B_PIC of a GOP, depending on the number |
| * of incomp B_pics in the subgop, there can be either only I |
| * or I,P pics between this and the next B_PIC |
| */ |
| if(i4_b_count_in_gop == i4_b_frms_in_prd) |
| { |
| i4_b_pic_idx += (2 + (!i4_b_in_incomp_subgop)); /*Prev*/ |
| i4_b_count_in_gop = 0; |
| } |
| /* |
| * For the last B_PIC of a subgop, there's always a P b/w |
| * this & the next B_PIC |
| */ |
| else |
| { |
| i4_b_pic_idx += 2; |
| } |
| i4_b_count_in_subgop = 0; |
| } |
| } |
| else |
| { |
| /* For the last B_PIC of a gop |
| * Normally,there will be 3 pics (P,I,P) between this and the next |
| * B_PIC for a CLOSED gop, except when |
| * 1)Number of P_pics in the gop = 1 |
| * 2)There is an extra P at the end of the gop |
| */ |
| if(i4_b_count_in_gop == i4_b_frms_in_prd) |
| { |
| i4_b_pic_idx += (3 + ((i4_b_in_incomp_subgop == 0) |
| && (i4_p_frms_in_prd> 1) |
| && (i4_pic_disp_order_no |
| != (i4_p_frms_in_prd+ i4_b_frms_in_prd- 1)))); |
| |
| i4_b_count_in_subgop = 0; |
| } |
| /* For a B_PIC which is not the last one in a subgop */ |
| else if(i4_b_count_in_subgop < i4_num_b_in_subgop) |
| { |
| i4_b_pic_idx++; |
| } |
| else /* For the last B_PIC of a subgop */ |
| { |
| i4_b_pic_idx += 2; |
| i4_b_count_in_subgop = 0; |
| } |
| } |
| i4_b_pic_idx %= (i4_max_inter_frm_int + 1); |
| } |
| /*********** I or P pic *********/ |
| else |
| { |
| ps_pic_handling->as_pic_stack[i4_ref_pic_idx].i4_pic_id = i4_enc_pic_id; |
| ps_pic_handling->as_pic_stack[i4_ref_pic_idx].i4_pic_disp_order_no = |
| i4_pic_disp_order_no; |
| /* Store Pic type*/ |
| e_previous_pic_type = I_PIC; |
| |
| /**** I_PIC ****/ |
| if(i4_pic_disp_order_no == 0) |
| { |
| ps_pic_handling->as_pic_stack[i4_ref_pic_idx].e_pic_type = I_PIC; |
| |
| /* Update the prev_pic_details */ |
| memcpy(&ps_pic_handling->s_prev_pic_details, |
| &ps_pic_handling->as_pic_stack[i4_ref_pic_idx], |
| sizeof(pic_details_t)); |
| /* |
| * In case of an I-frame depending on OPEN or CLOSED gop, |
| * the ref_pic_idx changes |
| */ |
| if((!i4_is_gop_closed) && (i4_is_first_gop == 0)) |
| { |
| if((i4_p_frms_in_prd <= 1) && (i4_b_in_incomp_subgop == 0)) |
| { |
| i4_ref_pic_idx++; |
| } |
| /* |
| * From the 2nd gop onwards, the I and first P frame are |
| * separated by the num_b_in_incomp_subgop |
| */ |
| else |
| { |
| i4_ref_pic_idx += (i4_b_in_incomp_subgop + 1); |
| } |
| |
| ps_pic_handling->i4_b_in_incomp_subgop_mix_gop = |
| ps_pic_handling->i4_b_in_incomp_subgop; |
| } |
| else |
| { |
| i4_ref_pic_idx++; |
| } |
| |
| i4_b_count_in_gop = 0; |
| i4_p_count_in_gop = 0; |
| i4_b_count_in_subgop = 0; |
| |
| } |
| /**** P_PIC ****/ |
| else |
| { |
| ps_pic_handling->as_pic_stack[i4_ref_pic_idx].e_pic_type = P_PIC; |
| /* Store Pic type*/ |
| e_previous_pic_type = P_PIC; |
| |
| /* Update the prev_pic_details */ |
| memcpy(&ps_pic_handling->s_prev_pic_details, |
| &ps_pic_handling->as_pic_stack[i4_ref_pic_idx], |
| sizeof(pic_details_t)); |
| |
| i4_p_count_in_gop++; |
| ps_pic_handling->i4_prev_intra_frame_interval = i4_intra_frm_int; |
| |
| /* |
| * In case of an P-frame depending on OPEN or CLOSED gop, the |
| * ref_pic_idx changes |
| */ |
| if(i4_is_gop_closed && (i4_p_count_in_gop == i4_p_frms_in_prd)) |
| { |
| /* |
| * For the last P_PIC in a gop, if extra_p or incomp_b are |
| * present, the number of such pics between this and the next |
| * ref_pic is (i4_b_in_incomp_subgop + 1) |
| */ |
| if((i4_p_count_in_gop > 1) |
| && (i4_b_in_incomp_subgop || i4_extra_p)) |
| { |
| i4_ref_pic_idx += (i4_b_in_incomp_subgop + 1); |
| } |
| else |
| { |
| i4_ref_pic_idx += i4_inter_frm_int; |
| } |
| } |
| else |
| { |
| i4_ref_pic_idx += i4_inter_frm_int; |
| } |
| } |
| |
| i4_ref_pic_idx %= (i4_max_inter_frm_int + 1); |
| } |
| |
| /* Update those variables working on the input frames */ |
| i4_pic_disp_order_no++; |
| i4_buf_pic_no++; |
| |
| #if 0 |
| /* For any gop */ |
| /* BUG FIX |
| * This piece of code resets the gop upon I frame(?) |
| * This introduces a problem of GOP getting reset not at I frames as it should be |
| * The reason AFAIK is that |
| * 1) This code uses i4_pic_disp_order_no to reset GOP. I assume it computes |
| * if are at GOP boundary and does it, but not sure |
| * 2) The frames rmainign in GOP is done in post enc as it should be. |
| * |
| * Also ps_pic_handling->i4_pic_disp_order_no is incremented when a pic is added |
| * to stack becuase the additon is in disp order while poping is in encode order |
| * |
| * SUppose there is a deay od 1 frame between queue and encode. |
| * then he timing will be. Assume a GOP of IPPIPP |
| * |
| * Input buff Input to qu Output buf/encode buff remaining pic in gop |
| * 1 I I NA rest to 1 2 |
| * 2 P P I 0 2 |
| * 3 P P P 0 1 |
| * 4 I I P reset to 1 2 |
| * 5 P P I 1 1 |
| * 6 P P P 1 0 |
| * 7 NA NA P |
| * |
| * Hence our gop gets reset at I(1) and I(4) in the RC.thus the reaming pic in gop |
| * count will be as shown. We can clearly see that the GOP gets reset at I(4) .Hence |
| * for the correpondinng QP for output buf p(4) will be that of an I frame. |
| * |
| * By hiding this I hope to fix this problem. But Iam not sure exaclty. |
| * This needs to be investigated further |
| * |
| * By hiding this most likely we are in effect disabling the dynanic |
| * update of gop params. |
| */ |
| |
| if(ps_pic_handling->i4_pic_disp_order_no |
| == (i4_max_inter_frm_int - 1- ((!i4_is_gop_closed) |
| * ps_pic_handling->i4_b_in_incomp_subgop_mix_gop))) |
| { |
| for(i = 0; i < MAX_PIC_TYPE; i++) |
| { |
| ps_pic_handling->i4_rem_frms_in_gop[i] = |
| ps_pic_handling->i4_frms_in_cur_gop[i]; |
| } |
| |
| if((!i4_is_gop_closed) && (i4_is_first_gop) |
| && (ps_pic_handling->i4_rem_frms_in_gop[B_PIC] |
| > ps_pic_handling->i4_b_in_incomp_subgop_mix_gop)) |
| { |
| ps_pic_handling->i4_rem_frms_in_gop[B_PIC] = |
| ps_pic_handling->i4_frms_in_cur_gop[B_PIC] |
| - ps_pic_handling->i4_b_in_incomp_subgop_mix_gop; |
| } |
| } |
| #endif |
| |
| /* End of GOP updates */ |
| if(i4_pic_disp_order_no == (i4_p_frms_in_prd + i4_b_frms_in_prd + 1)) |
| { |
| /* Now, the end of gop updates */ |
| i4_pic_disp_order_no = 0; |
| i4_buf_pic_no = 0; |
| i4_is_first_gop = 0; |
| ps_pic_handling->i4_extra_p_mix_gop = ps_pic_handling->i4_extra_p; |
| |
| if(i4_is_gop_closed) |
| { |
| ps_pic_handling->i4_b_in_incomp_subgop_mix_gop = |
| ps_pic_handling->i4_b_in_incomp_subgop; |
| } |
| |
| for(i = 0; i < MAX_PIC_TYPE; i++) |
| { |
| ps_pic_handling->i4_frms_in_cur_gop[i] = |
| ps_pic_handling->i4_frms_in_gop[i]; |
| } |
| } |
| |
| /* Updating the vars which work on the encoded pics */ |
| /* For the first gop */ |
| if ((ps_pic_handling->i4_is_first_gop) |
| && (ps_pic_handling->i4_pic_disp_order_no == 0)) |
| { |
| ps_pic_handling->i4_coded_pic_no = 0; |
| ps_pic_handling->i4_stack_count = 0; |
| } |
| |
| /* Update the state struct with the modifiable local vars */ |
| ps_pic_handling->i4_buf_pic_no = i4_buf_pic_no; |
| ps_pic_handling->i4_pic_disp_order_no = i4_pic_disp_order_no; |
| ps_pic_handling->i4_b_pic_idx = i4_b_pic_idx; |
| ps_pic_handling->i4_ref_pic_idx = i4_ref_pic_idx; |
| ps_pic_handling->i4_is_first_gop = i4_is_first_gop; |
| ps_pic_handling->i4_p_count_in_gop = i4_p_count_in_gop; |
| ps_pic_handling->i4_b_count_in_gop = i4_b_count_in_gop; |
| ps_pic_handling->i4_b_count_in_subgop = i4_b_count_in_subgop; |
| ps_pic_handling->e_previous_pic_type = e_previous_pic_type; |
| ps_pic_handling->i4_force_I_frame = i4_force_I_frame; |
| } |
| |
| /******************************************************************************* |
| * @brief Returns the picture type, ip and display order number for the frame to |
| * be encoded |
| ******************************************************************************/ |
| void irc_get_pic_from_stack(pic_handling_t *ps_pic_handling, |
| WORD32 *pi4_pic_id, |
| WORD32 *pi4_pic_disp_order_no, |
| picture_type_e *pe_pic_type) |
| { |
| pic_details_t s_pic_details; |
| pic_details_t *ps_pic_details = &s_pic_details; |
| |
| if(ps_pic_handling->i4_stack_count < 0) |
| { |
| ps_pic_details->e_pic_type = BUF_PIC; |
| ps_pic_details->i4_pic_disp_order_no = -1; |
| ps_pic_details->i4_pic_id = -1; |
| } |
| else |
| { |
| memcpy(ps_pic_details, |
| &ps_pic_handling->as_pic_stack[ps_pic_handling->i4_stack_count], |
| sizeof(pic_details_t)); |
| |
| /* Force I frame updations */ |
| if((ps_pic_handling->i4_force_I_frame == 1) |
| && (ps_pic_details->e_pic_type == I_PIC)) |
| { |
| /* Flag to signal change in remaining bits*/ |
| ps_pic_handling->i4_forced_I_frame_cur_frame = 1; |
| ps_pic_handling->i4_force_I_frame = 0; |
| /* |
| * Indicates count for no. of Pictures whose temporal reference |
| * has to be modified |
| * in the new GOP |
| */ |
| ps_pic_handling->i4_mod_temp_ref_cnt = |
| ps_pic_handling->i4_b_in_incomp_subgop + 1; |
| ps_pic_handling->i4_first_gop_encoded = 1; |
| } |
| |
| /* |
| * In MPEG2, the temporal reference of the first displayed frame in a |
| * gop is 0.In case of an OPEN_GOP, the B_PICs of the last subgop in a |
| * gop, maybe coded as a part of the next gop. Hence, in such conditions |
| * the pic_disp_order needs to be modified so that it gives an |
| * indication of the temporal reference |
| */ |
| if((!ps_pic_handling->i4_is_gop_closed) |
| && (ps_pic_handling->i4_first_gop_encoded)) |
| { |
| if(!ps_pic_handling->i4_mod_temp_ref_cnt) |
| { |
| ps_pic_details->i4_pic_disp_order_no = |
| (ps_pic_handling->as_pic_stack[ps_pic_handling->i4_stack_count].i4_pic_disp_order_no |
| + ps_pic_handling->i4_b_in_incomp_subgop) |
| % (ps_pic_handling->i4_prev_intra_frame_interval); |
| |
| } |
| else |
| { |
| /* |
| * due to force I frame First frame will have only |
| * ps_pic_handling->i4_frames_in_fif_gop number of frames |
| */ |
| ps_pic_details->i4_pic_disp_order_no = |
| (ps_pic_handling->as_pic_stack[ps_pic_handling->i4_stack_count].i4_pic_disp_order_no |
| + ps_pic_handling->i4_b_in_incomp_subgop) |
| % (ps_pic_handling->i4_frames_in_fif_gop); |
| ps_pic_handling->i4_mod_temp_ref_cnt--; |
| } |
| } |
| } |
| |
| /* Giving this to the Codec */ |
| *pi4_pic_id = s_pic_details.i4_pic_id; |
| *pi4_pic_disp_order_no = s_pic_details.i4_pic_disp_order_no; |
| *pe_pic_type = s_pic_details.e_pic_type; |
| } |
| |
| /******************************************************************************* |
| * @brief Updates the picture handling state whenever there is changes in input |
| * parameter |
| * |
| ******************************************************************************/ |
| static void irc_update_pic_distbn(pic_handling_t *ps_pic_handling, |
| WORD32 i4_intra_frm_int, |
| WORD32 i4_inter_frm_int, |
| WORD32 i4_gop_boundary) |
| { |
| /* Declarations */ |
| WORD32 i4_is_gop_closed; |
| WORD32 i, i4_prev_inter_frm_int, i4_max_inter_frm_int, i4_pic_disp_order_no; |
| WORD32 i4_b_in_incomp_subgop, i4_extra_p, |
| i4_b_in_incomp_subgop_mix_gop,i4_extra_p_mix_gop; |
| WORD32 i4_pb_frms_till_prev_p; |
| WORD32 ai4_diff_in_frms[MAX_PIC_TYPE]; |
| |
| /* Initialize the local vars from the state struct */ |
| i4_is_gop_closed = ps_pic_handling->i4_is_gop_closed; |
| i4_prev_inter_frm_int = ps_pic_handling->i4_inter_frm_int; |
| i4_max_inter_frm_int = ps_pic_handling->i4_max_inter_frm_int; |
| i4_b_in_incomp_subgop = ps_pic_handling->i4_b_in_incomp_subgop; |
| i4_extra_p = ps_pic_handling->i4_extra_p; |
| i4_b_in_incomp_subgop_mix_gop = |
| ps_pic_handling->i4_b_in_incomp_subgop_mix_gop; |
| i4_extra_p_mix_gop = ps_pic_handling->i4_extra_p_mix_gop; |
| i4_pic_disp_order_no = ps_pic_handling->i4_pic_disp_order_no; |
| |
| i4_pb_frms_till_prev_p = (ps_pic_handling->i4_p_count_in_gop |
| * i4_prev_inter_frm_int); |
| |
| /* Check for the validity of the intra_frm_int */ |
| if(i4_intra_frm_int <= 0) |
| { |
| i4_intra_frm_int = ps_pic_handling->i4_intra_frm_int; |
| } |
| /* Check for the validity of the inter_frm_int */ |
| if((i4_inter_frm_int > i4_max_inter_frm_int) || (i4_inter_frm_int < 0)) |
| { |
| i4_inter_frm_int = ps_pic_handling->i4_inter_frm_int; |
| } |
| |
| /* Keep a copy of the older frms_in_gop */ |
| for(i = 0; i < MAX_PIC_TYPE; i++) |
| { |
| ai4_diff_in_frms[i] = ps_pic_handling->i4_frms_in_cur_gop[i]; |
| } |
| |
| /* Update all the variables which are calculated from the inter_frm_int */ |
| |
| /* Get the new pic distribution in the gop */ |
| find_pic_distbn_in_gop(ps_pic_handling->i4_frms_in_gop, i4_intra_frm_int, |
| i4_inter_frm_int, i4_is_gop_closed, |
| &i4_b_in_incomp_subgop, &i4_extra_p); |
| |
| /* Find the other related variables */ |
| if(i4_gop_boundary == 0) |
| { |
| /* |
| * Since, the inter frame interval has changed between a gop the |
| * current gop will be a mixed gop. So, we need to find the values of |
| * the related variables |
| */ |
| find_pic_distbn_in_gop(ps_pic_handling->i4_frms_in_cur_gop, |
| (i4_intra_frm_int - i4_pb_frms_till_prev_p), |
| i4_inter_frm_int, i4_is_gop_closed, |
| &i4_b_in_incomp_subgop_mix_gop, |
| &i4_extra_p_mix_gop); |
| |
| ps_pic_handling->i4_frms_in_cur_gop[P_PIC] += |
| ps_pic_handling->i4_p_count_in_gop; |
| ps_pic_handling->i4_frms_in_cur_gop[B_PIC] += |
| ps_pic_handling->i4_b_count_in_gop; |
| } |
| else |
| { |
| /* |
| * Since, the inter_frm_interval has changed at a gop boundary, the |
| * new gop will have all the subgops with the new inter_frm_interval |
| */ |
| for(i = 0; i < MAX_PIC_TYPE; i++) |
| { |
| ps_pic_handling->i4_frms_in_cur_gop[i] = |
| ps_pic_handling->i4_frms_in_gop[i]; |
| } |
| |
| i4_b_in_incomp_subgop_mix_gop = i4_b_in_incomp_subgop; |
| i4_extra_p_mix_gop = i4_extra_p; |
| } |
| |
| /* For bit-allocation the rem_frms_in_gop need to be updated */ |
| /* Checks needed: |
| 1) If the encoding is happening on the same gop as that of the buffering */ |
| if(ps_pic_handling->i4_pic_disp_order_no |
| >= (i4_max_inter_frm_int - 1- ((!i4_is_gop_closed) |
| * ps_pic_handling->i4_b_in_incomp_subgop_mix_gop))) |
| { |
| for(i = 0; i < MAX_PIC_TYPE; i++) |
| { |
| ps_pic_handling->i4_rem_frms_in_gop[i] += |
| (ps_pic_handling->i4_frms_in_cur_gop[i] |
| - ai4_diff_in_frms[i]); |
| } |
| } |
| |
| /* Update the vars which will affect the proper filling of the pic_stack */ |
| if(i4_pic_disp_order_no == 0) /*Check if redundant*/ |
| { |
| ps_pic_handling->i4_buf_pic_no = 0; |
| } |
| else |
| { |
| ps_pic_handling->i4_buf_pic_no = 1; |
| } |
| |
| ps_pic_handling->i4_b_count_in_subgop = 0; |
| |
| /* Update the state struct with the new inter_frm_int */ |
| ps_pic_handling->i4_inter_frm_int = i4_inter_frm_int; |
| ps_pic_handling->i4_intra_frm_int = i4_intra_frm_int; |
| ps_pic_handling->i4_b_in_incomp_subgop = i4_b_in_incomp_subgop; |
| ps_pic_handling->i4_extra_p = i4_extra_p; |
| ps_pic_handling->i4_b_in_incomp_subgop_mix_gop = |
| i4_b_in_incomp_subgop_mix_gop; |
| ps_pic_handling->i4_extra_p_mix_gop = i4_extra_p_mix_gop; |
| |
| } |
| |
| /* ***************************************************************************** |
| * @brief Distributes the frames as I, P and B based on intra/inter frame interval. |
| * Along with it it fills the number of frames in sub-gop and extra p frame |
| * |
| ******************************************************************************/ |
| static void find_pic_distbn_in_gop(WORD32 i4_frms_in_gop[MAX_PIC_TYPE], |
| WORD32 i4_intra_frm_int, |
| WORD32 i4_inter_frm_int, |
| WORD32 i4_is_gop_closed, |
| WORD32 *pi4_b_in_incomp_subgop, |
| WORD32 *pi4_extra_p) |
| { |
| /* |
| * Find the pic distribution in the gop depending on the inter and intra |
| * frm intervals |
| */ |
| i4_frms_in_gop[I_PIC] = 1; |
| |
| /* All I frames */ |
| if(i4_intra_frm_int == 1) |
| { |
| i4_frms_in_gop[P_PIC] = 0; |
| i4_frms_in_gop[B_PIC] = 0; |
| *pi4_b_in_incomp_subgop = 0; |
| *pi4_extra_p = 0; |
| } |
| else |
| { |
| if(i4_is_gop_closed) |
| { |
| i4_frms_in_gop[P_PIC] = ((i4_intra_frm_int - 2) / i4_inter_frm_int) |
| + 1; |
| |
| if((((i4_intra_frm_int - 2) / i4_inter_frm_int) * i4_inter_frm_int) |
| == (i4_intra_frm_int - 2)) |
| { |
| *pi4_extra_p = 1; |
| } |
| else |
| { |
| *pi4_extra_p = 0; |
| } |
| } |
| else |
| { |
| i4_frms_in_gop[P_PIC] = ((i4_intra_frm_int - 1) / i4_inter_frm_int); |
| |
| *pi4_extra_p = 0; |
| } |
| |
| i4_frms_in_gop[B_PIC] = (i4_intra_frm_int - 1 - i4_frms_in_gop[P_PIC]); |
| |
| *pi4_b_in_incomp_subgop = (i4_frms_in_gop[B_PIC] - (i4_inter_frm_int - 1) |
| * ((i4_intra_frm_int - 1)/ i4_inter_frm_int)); |
| } |
| } |
| |
| WORD32 irc_pic_type_get_intra_frame_interval(pic_handling_t *ps_pic_handling) |
| { |
| |
| return (ps_pic_handling->i4_intra_frm_int); |
| } |
| |
| WORD32 irc_pic_type_get_inter_frame_interval(pic_handling_t *ps_pic_handling) |
| { |
| return (ps_pic_handling->i4_inter_frm_int); |
| } |
| |
| void irc_pic_type_get_rem_frms_in_gop(pic_handling_t *ps_pic_handling, |
| WORD32 ai4_rem_frms_in_gop[MAX_PIC_TYPE]) |
| { |
| memcpy(ai4_rem_frms_in_gop, ps_pic_handling->i4_rem_frms_in_gop, |
| sizeof(ps_pic_handling->i4_rem_frms_in_gop)); |
| } |
| |
| WORD32 irc_pic_type_get_frms_in_gop_force_I_frm(pic_handling_t *ps_pic_handling) |
| { |
| return (ps_pic_handling->i4_frames_in_fif_gop); |
| } |
| |
| void irc_pic_type_get_frms_in_gop(pic_handling_t *ps_pic_handling, |
| WORD32 ai4_frms_in_gop[MAX_PIC_TYPE]) |
| { |
| memcpy(ai4_frms_in_gop, ps_pic_handling->i4_frms_in_cur_gop, |
| sizeof(ps_pic_handling->i4_frms_in_cur_gop)); |
| } |
| |
| WORD32 irc_pic_type_get_disp_order_no(pic_handling_t *ps_pic_handling) |
| { |
| return (ps_pic_handling->i4_pic_disp_order_no); |
| } |
| |
| void irc_set_force_I_frame_flag(pic_handling_t *ps_pic_handling) |
| { |
| ps_pic_handling->i4_force_I_frame = 1; |
| } |
| WORD32 irc_get_forced_I_frame_cur_frm_flag(pic_handling_t *ps_pic_handling) |
| { |
| return (ps_pic_handling->i4_forced_I_frame_cur_frame); |
| } |
| void irc_reset_forced_I_frame_cur_frm_flag(pic_handling_t *ps_pic_handling) |
| { |
| ps_pic_handling->i4_forced_I_frame_cur_frame = 0; |
| } |
| |
| /******************************************************************************/ |
| /* Functions that work on the encoded frames */ |
| /******************************************************************************/ |
| |
| /****************************************************************************** |
| Function Name : irc_update_pic_handling |
| Description : Will be called only for the frames to be encoded |
| *****************************************************************************/ |
| void irc_update_pic_handling(pic_handling_t *ps_pic_handling, |
| picture_type_e e_pic_type) |
| { |
| |
| WORD32 i4_max_inter_frm_int; |
| WORD32 i; |
| |
| /* Initializing the local vars with that of the state struct */ |
| i4_max_inter_frm_int = ps_pic_handling->i4_max_inter_frm_int; |
| |
| /* Update the variables working on the output frames */ |
| /* Update the stack count */ |
| ps_pic_handling->i4_stack_count++; |
| |
| if(ps_pic_handling->i4_stack_count == (i4_max_inter_frm_int + 1)) |
| { |
| ps_pic_handling->i4_stack_count = 0; |
| } |
| |
| /* Update the rem_frms_in_gop */ |
| ps_pic_handling->i4_rem_frms_in_gop[e_pic_type]--; |
| |
| /* Assumption : Rem_frms_in_gop needs to be taken care of, for every change in frms */ |
| ps_pic_handling->i4_last_frm_in_gop = 0; |
| if((ps_pic_handling->i4_rem_frms_in_gop[I_PIC] <= 0) |
| && (ps_pic_handling->i4_rem_frms_in_gop[P_PIC] <= 0) |
| && (ps_pic_handling->i4_rem_frms_in_gop[B_PIC] <= 0)) |
| { |
| /* Copy the cur_frms_in_gop to the rem_frm_in_gop */ |
| for(i = 0; i < MAX_PIC_TYPE; i++) |
| { |
| ps_pic_handling->i4_rem_frms_in_gop[i] = |
| ps_pic_handling->i4_frms_in_cur_gop[i]; |
| } |
| |
| ps_pic_handling->i4_last_frm_in_gop = 1; |
| ps_pic_handling->i4_first_gop_encoded = 1; |
| } |
| } |
| |
| WORD32 irc_is_last_frame_in_gop(pic_handling_handle ps_pic_handling) |
| { |
| return (ps_pic_handling->i4_last_frm_in_gop); |
| } |
| |
| /****************************************************************************** |
| Function Name : irc_skip_encoded_frame |
| Description : Needs to go to the current pic in the pic_stack. |
| If it's B_PIC don't do anything |
| If it's a reference picture, push all but the last B_PICs |
| in the current subgop one place down (i.e. just copy their |
| pic_details) and move the last B_PIC in that subgop to the |
| next slot of the skipped picture and convert it's pic_type |
| to that of the reference picture |
| *****************************************************************************/ |
| void irc_skip_encoded_frame(pic_handling_t *ps_pic_handling, |
| picture_type_e e_pic_type) |
| { |
| pic_details_t s_pic_details; |
| WORD32 i4_stack_count, i4_next_ref_pic_idx, i4_pic_idx; |
| WORD32 i4_max_inter_frm_int, i4_last_b_pic_idx, i4_first_b_pic_idx; |
| WORD32 i4_next_pic_idx; |
| |
| /* State variables used to initialize the local vars (Not to be changed) */ |
| i4_stack_count = ps_pic_handling->i4_stack_count; |
| i4_next_ref_pic_idx = ps_pic_handling->i4_ref_pic_idx; |
| i4_max_inter_frm_int = ps_pic_handling->i4_max_inter_frm_int; |
| |
| i4_next_pic_idx = ((i4_stack_count + 1) % (i4_max_inter_frm_int + 1)); |
| |
| /* |
| * Check what is the encoded frm_type |
| * Changing a B_PIC to a ref_pic is not reqd if |
| * there are no B_PICs referring from the skipped ref_pic |
| */ |
| if(((e_pic_type == P_PIC) || (e_pic_type == I_PIC)) |
| && (i4_next_pic_idx != i4_next_ref_pic_idx)) |
| { |
| /* Go to the last B_PIC before the next_ref_pic */ |
| if(i4_next_ref_pic_idx == 0) |
| { |
| i4_last_b_pic_idx = i4_max_inter_frm_int; |
| } |
| else |
| { |
| i4_last_b_pic_idx = (i4_next_ref_pic_idx - 1); |
| } |
| |
| /* Keep a copy of the last B_PIC pic_details */ |
| memcpy(&s_pic_details, |
| &ps_pic_handling->as_pic_stack[i4_last_b_pic_idx], |
| sizeof(pic_details_t)); |
| |
| i4_pic_idx = i4_last_b_pic_idx; |
| i4_first_b_pic_idx = (i4_stack_count + 1) % (i4_max_inter_frm_int + 1); |
| |
| /* |
| * All the B_PICs other than the last one, need to be shifted one place |
| * in the stack |
| */ |
| while((i4_pic_idx != i4_stack_count) |
| && (i4_first_b_pic_idx != i4_last_b_pic_idx)) |
| { |
| if(i4_pic_idx == 0) |
| { |
| i4_pic_idx = i4_max_inter_frm_int; |
| } |
| else |
| { |
| i4_pic_idx--; |
| } |
| |
| memcpy(&ps_pic_handling->as_pic_stack[(i4_pic_idx + 1) |
| % (i4_max_inter_frm_int + 1)], |
| &ps_pic_handling->as_pic_stack[i4_pic_idx], |
| sizeof(pic_details_t)); |
| |
| } |
| |
| /* |
| * Copy the last B_PIC pic_details to the first B_PIC place and change |
| * it's pic type to the ref_PIC |
| */ |
| /*e_ref_pic_type*/ |
| ps_pic_handling->as_pic_stack[i4_first_b_pic_idx].e_pic_type = P_PIC; |
| |
| ps_pic_handling->as_pic_stack[i4_first_b_pic_idx].i4_pic_disp_order_no = |
| s_pic_details.i4_pic_disp_order_no; |
| ps_pic_handling->as_pic_stack[i4_first_b_pic_idx].i4_pic_id = |
| s_pic_details.i4_pic_id; |
| |
| /* Change the rem_frms_in_prd so that the update works properly */ |
| if(ps_pic_handling->i4_rem_frms_in_gop[B_PIC] > 0) |
| { |
| ps_pic_handling->i4_rem_frms_in_gop[B_PIC]--; |
| ps_pic_handling->i4_rem_frms_in_gop[P_PIC]++; |
| } |
| } |
| |
| } |
| |
| /****************************************************************************** |
| Function Name : flush_frame |
| Description : Since when a flush frame is called, there will be no valid |
| frames after it, the last frame cannot be a B_PIC, as there |
| will be no reference frame for it (Input in display order) |
| |
| So,this fxn needs to go to the last added pic in the pic_stack. |
| If it's reference pic don't do anything |
| If it's a B_PIC, copy it's pic_details and put it in the |
| place of the next reference pic, changing the pic_type to |
| P_PIC |
| *****************************************************************************/ |
| void irc_flush_frame_from_pic_stack(pic_handling_t *ps_pic_handling) |
| { |
| |
| pic_details_t s_prev_pic_details; |
| |
| /* Get the last entered pic_details (not to be modified here) */ |
| WORD32 i4_prev_b_pic_idx = ps_pic_handling->i4_prev_b_pic_idx; |
| WORD32 i4_ref_pic_idx = ps_pic_handling->i4_ref_pic_idx; |
| WORD32 i4_b_pic_idx = ps_pic_handling->i4_b_pic_idx; |
| |
| memcpy(&s_prev_pic_details, &ps_pic_handling->s_prev_pic_details, |
| sizeof(pic_details_t)); |
| |
| if(s_prev_pic_details.e_pic_type == B_PIC) |
| { |
| /* Copy the last B_PIC details to the next reference pic in display order */ |
| ps_pic_handling->as_pic_stack[i4_ref_pic_idx].i4_pic_disp_order_no = |
| s_prev_pic_details.i4_pic_disp_order_no; |
| ps_pic_handling->as_pic_stack[i4_ref_pic_idx].i4_pic_id = |
| s_prev_pic_details.i4_pic_id; |
| ps_pic_handling->as_pic_stack[i4_ref_pic_idx].e_pic_type = P_PIC; |
| |
| /* |
| * Modify the last B_PIC pic_type, so that codec gets to know when |
| * all the buffered frames |
| * are flushed |
| */ |
| ps_pic_handling->as_pic_stack[i4_prev_b_pic_idx].e_pic_type = |
| MAX_PIC_TYPE; |
| ps_pic_handling->as_pic_stack[i4_prev_b_pic_idx].i4_pic_id = -1; |
| ps_pic_handling->as_pic_stack[i4_prev_b_pic_idx].i4_pic_disp_order_no = |
| -1; |
| } |
| else |
| { |
| /* |
| * Modify the next pic_type details in the stack, so that codec gets to |
| * know when all the |
| * buffered frames are flushed |
| */ |
| ps_pic_handling->as_pic_stack[i4_ref_pic_idx].e_pic_type = MAX_PIC_TYPE; |
| ps_pic_handling->as_pic_stack[i4_ref_pic_idx].i4_pic_id = -1; |
| ps_pic_handling->as_pic_stack[i4_ref_pic_idx].i4_pic_disp_order_no = -1; |
| |
| if(ps_pic_handling->i4_inter_frm_int != 1) |
| { |
| ps_pic_handling->as_pic_stack[i4_b_pic_idx].e_pic_type = |
| MAX_PIC_TYPE; |
| ps_pic_handling->as_pic_stack[i4_b_pic_idx].i4_pic_id = -1; |
| ps_pic_handling->as_pic_stack[i4_b_pic_idx].i4_pic_disp_order_no = |
| -1; |
| } |
| } |
| } |
| |
| /****************************************************************************** |
| Function Name : irc_add_pic_to_stack_re_enc |
| Description : In case of a re-enc, we can assume the pictures to be coming |
| in the encode order. |
| In case of re-encoder basically, there are 2 problematic cases. |
| 1)Inter_frm_int is not known to start with |
| 2)Inter_frm_int can keep changing |
| 3)Intra_frm_int set by the application and that actually in the |
| decoded bitstream may be different |
| *****************************************************************************/ |
| WORD32 irc_add_pic_to_stack_re_enc(pic_handling_t *ps_pic_handling, |
| WORD32 i4_enc_pic_id, |
| picture_type_e e_pic_type) |
| { |
| WORD32 i4_b_count_in_subgop; |
| WORD32 i4_max_inter_frm_int, i4_inter_frm_int, i4_intra_frm_int; |
| WORD32 i4_pic_disp_order_no; |
| WORD32 i4_is_gop_closed; |
| picture_type_e e_out_pic_type; |
| WORD32 i4_b_in_incomp_subgop; |
| |
| /* Check if a change in intra_frm_int call has been made */ |
| if(ps_pic_handling->i4_change_in_intra_frm_int == 1) |
| { |
| irc_update_pic_distbn(ps_pic_handling, |
| ps_pic_handling->i4_new_intra_frm_int, |
| ps_pic_handling->i4_inter_frm_int, 1); |
| ps_pic_handling->i4_change_in_intra_frm_int = 0; |
| } |
| |
| /* Check if a change in inter_frm_int call has been made */ |
| if(ps_pic_handling->i4_change_in_inter_frm_int == 1) |
| { |
| irc_update_pic_distbn(ps_pic_handling, |
| ps_pic_handling->i4_intra_frm_int, |
| ps_pic_handling->i4_new_inter_frm_int, 1); |
| |
| ps_pic_handling->i4_change_in_inter_frm_int = 0; |
| } |
| |
| /* Initialize the local vars with the state vars */ |
| i4_b_count_in_subgop = ps_pic_handling->i4_b_count_in_subgop; |
| i4_max_inter_frm_int = ps_pic_handling->i4_max_inter_frm_int; |
| i4_inter_frm_int = ps_pic_handling->i4_inter_frm_int; |
| i4_intra_frm_int = ps_pic_handling->i4_intra_frm_int; |
| i4_pic_disp_order_no = ps_pic_handling->i4_pic_disp_order_no; |
| i4_is_gop_closed = ps_pic_handling->i4_is_gop_closed; |
| i4_b_in_incomp_subgop = ps_pic_handling->i4_b_in_incomp_subgop; |
| |
| e_out_pic_type = e_pic_type; |
| |
| /* Initially the rate_control assumes an IPP sequence */ |
| if(e_pic_type == B_PIC) |
| { |
| /* Update the number of B_PICs in a subgop */ |
| i4_b_count_in_subgop++; |
| |
| if(i4_b_count_in_subgop > i4_max_inter_frm_int) |
| { |
| return (-1); |
| } |
| |
| /* If the number of B_PICs exceed the set inter_frm_int then |
| change the inter_frm_int */ |
| if(i4_b_count_in_subgop > (i4_inter_frm_int - 1)) |
| { |
| i4_inter_frm_int = (i4_b_count_in_subgop + 1); |
| |
| irc_update_pic_distbn(ps_pic_handling, i4_intra_frm_int, |
| i4_inter_frm_int, 0); |
| } |
| } |
| else if((e_pic_type == I_PIC) || (e_pic_type == P_PIC)) |
| { |
| /* If the B_PICs in the prev subgop were fewer than the current |
| * (inter_frm_int-1) and none of these conditions occur, it'll mean the |
| * decrease in the inter_frm_int |
| * 1)End of a GOP |
| * 2)Beginning of an OPEN_GOP |
| */ |
| if((i4_b_count_in_subgop < (i4_inter_frm_int - 1)) |
| && !((!i4_is_gop_closed) |
| && (i4_b_count_in_subgop |
| >= i4_b_in_incomp_subgop)) |
| && !((i4_pic_disp_order_no |
| + (i4_inter_frm_int - 1 |
| - i4_b_count_in_subgop)) |
| > i4_intra_frm_int)) |
| { |
| i4_inter_frm_int = (i4_b_count_in_subgop + 1); |
| |
| irc_update_pic_distbn(ps_pic_handling, i4_intra_frm_int, |
| i4_inter_frm_int, 0); |
| } |
| |
| /* Reset the number of B_PICs in a subgop */ |
| i4_b_count_in_subgop = 0; |
| } |
| |
| /* Updation of the frame level vars */ |
| i4_pic_disp_order_no++; |
| |
| /* End of gop condition |
| *Two cases can arise : |
| *1) The intra_frm_int set by the application is greater than the actual |
| * bitstream intra_frm_int (i.e. we will get an I frame before |
| * pic_disp_order_no goes to intra_frm_int) |
| *2) The intra_frm_int set by the application is smaller than the actual bitstream intra_frm_int |
| * (i.e. we won't get an I_PIC even if pic_disp_order_no goes to |
| * intra_frm_int) Constraints : |
| * 1) I_PIC cannot be changed to B_PIC |
| * 2) B_PIC cannot be changed to I_PIC |
| */ |
| if(i4_pic_disp_order_no >= i4_intra_frm_int) |
| { |
| if(e_pic_type != B_PIC) |
| { |
| e_out_pic_type = I_PIC; |
| } |
| else |
| { |
| e_out_pic_type = B_PIC; |
| ps_pic_handling->i4_rem_frms_in_gop[B_PIC]++; |
| ps_pic_handling->i4_frms_in_cur_gop[B_PIC]++; |
| ps_pic_handling->i4_frms_in_gop[B_PIC]++; |
| } |
| } |
| else |
| { |
| if((e_pic_type == I_PIC) && (!ps_pic_handling->i4_is_first_gop)) |
| { |
| e_out_pic_type = P_PIC; |
| ps_pic_handling->i4_rem_frms_in_gop[P_PIC]++; |
| ps_pic_handling->i4_frms_in_cur_gop[P_PIC]++; |
| ps_pic_handling->i4_frms_in_gop[P_PIC]++; |
| } |
| else |
| { |
| e_out_pic_type = e_pic_type; |
| } |
| } |
| |
| /* Update the frm_vars at the end of the gop */ |
| if(i4_pic_disp_order_no |
| == (ps_pic_handling->i4_frms_in_cur_gop[P_PIC] |
| + ps_pic_handling->i4_frms_in_cur_gop[B_PIC] |
| + 1)) |
| { |
| i4_pic_disp_order_no = 0; |
| ps_pic_handling->i4_is_first_gop = 0; |
| } |
| |
| /* Update the vars working on the encoded pics */ |
| if((ps_pic_handling->i4_is_first_gop) |
| && (ps_pic_handling->i4_stack_count == -1)) |
| { |
| ps_pic_handling->i4_coded_pic_no = 0; |
| ps_pic_handling->i4_stack_count = 0; |
| } |
| |
| /* Add the pic_details to the pic_stack */ |
| ps_pic_handling->as_pic_stack[ps_pic_handling->i4_stack_count].e_pic_type = |
| e_out_pic_type; |
| ps_pic_handling->as_pic_stack[ps_pic_handling->i4_stack_count].i4_pic_disp_order_no = |
| ps_pic_handling->i4_pic_disp_order_no; |
| ps_pic_handling->as_pic_stack[ps_pic_handling->i4_stack_count].i4_pic_id = |
| i4_enc_pic_id; |
| |
| /* Writing back those values which need to be updated */ |
| ps_pic_handling->i4_inter_frm_int = i4_inter_frm_int; |
| ps_pic_handling->i4_pic_disp_order_no = i4_pic_disp_order_no; |
| ps_pic_handling->i4_b_count_in_subgop = i4_b_count_in_subgop; |
| |
| return (0); |
| } |
