| /****************************************************************************** |
| * |
| * 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 |
| * ih264_dpb_mgr.c |
| * |
| * @brief |
| * Function definitions used for decoded picture buffer management |
| * |
| * @author |
| * Srinivas T |
| * |
| * @par List of Functions: |
| * - ih264_dpb_mgr_init() |
| * - ih264_dpb_mgr_sort_short_term_fields_by_frame_num() |
| * - ih264_dpb_mgr_sort_short_term_fields_by_poc_l0() |
| * - ih264_dpb_mgr_sort_short_term_fields_by_poc_l1() |
| * - ih264_dpb_mgr_sort_long_term_fields_by_frame_idx() |
| * - ih264_dpb_mgr_alternate_ref_fields() |
| * - ih264_dpb_mgr_insert_ref_field() |
| * - ih264_dpb_mgr_insert_ref_frame() |
| * - ih264_dpb_mgr_count_ref_frames() |
| * - ih264_dpb_mgr_delete_ref_frame() |
| * - ih264_dpb_mgr_delete_long_ref_fields_max_frame_idx() |
| * - ih264_dpb_mgr_delete_short_ref_frame() |
| * - ih264_dpb_mgr_delete_all_ref_frames() |
| * - ih264_dpb_mgr_reset() |
| * - ih264_dpb_mgr_release_pics() |
| * |
| * @remarks |
| * None |
| * |
| ******************************************************************************* |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <assert.h> |
| |
| #include "ih264_typedefs.h" |
| #include "ih264_defs.h" |
| #include "ih264_macros.h" |
| #include "ih264_error.h" |
| #include "ih264_structs.h" |
| #include "ih264_buf_mgr.h" |
| #include "ih264_dpb_mgr.h" |
| #include "ih264_debug.h" |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * DPB manager initializer |
| * |
| * @par Description: |
| * Initialises the DPB manager structure |
| * |
| * @param[in] ps_dpb_mgr |
| * Pointer to the DPB manager structure |
| * |
| * @returns |
| * |
| * @remarks |
| * |
| * |
| ******************************************************************************* |
| */ |
| |
| void ih264_dpb_mgr_init(dpb_mgr_t *ps_dpb_mgr) |
| { |
| UWORD32 i; |
| dpb_info_t *ps_dpb_info = ps_dpb_mgr->as_dpb_info; |
| for(i = 0; i < MAX_DPB_BUFS; i++) |
| { |
| ps_dpb_info[i].ps_prev_dpb = NULL; |
| ps_dpb_info[i].ps_pic_buf = NULL; |
| ps_dpb_mgr->as_top_field_pics[i].i4_used_as_ref = INVALID; |
| ps_dpb_mgr->as_bottom_field_pics[i].i4_used_as_ref = INVALID; |
| ps_dpb_mgr->as_top_field_pics[i].i1_field_type = INVALID; |
| ps_dpb_mgr->as_bottom_field_pics[i].i1_field_type = INVALID; |
| ps_dpb_mgr->as_top_field_pics[i].i4_long_term_frame_idx = -1; |
| ps_dpb_mgr->as_bottom_field_pics[i].i4_long_term_frame_idx = -1; |
| } |
| |
| ps_dpb_mgr->u1_num_short_term_ref_bufs = 0; |
| ps_dpb_mgr->u1_num_long_term_ref_bufs = 0; |
| ps_dpb_mgr->ps_dpb_short_term_head = NULL; |
| ps_dpb_mgr->ps_dpb_long_term_head = NULL; |
| } |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Function to sort sort term pics by frame_num. |
| * |
| * @par Description: |
| * Sorts short term fields by frame_num. For 2 fields having same frame_num, |
| * orders them based on requested first field type. |
| * |
| * @param[in] ps_dpb_mgr |
| * Pointer to the DPB manager structure |
| * |
| * @param[in] curr_frame_num |
| * frame_num of the current pic |
| * |
| * @param[in] first_field_type |
| * For complementary fields, required first field |
| * |
| * @param[in] max_frame_num |
| * Maximum frame_num allowed |
| * |
| * @returns |
| * |
| * @remarks |
| * |
| * |
| ******************************************************************************* |
| */ |
| WORD32 ih264_dpb_mgr_sort_short_term_fields_by_frame_num(dpb_mgr_t *ps_dpb_mgr, |
| WORD32 curr_frame_num, |
| WORD32 first_field_type, |
| WORD32 max_frame_num) |
| { |
| dpb_info_t *ps_dpb_node1 = ps_dpb_mgr->ps_dpb_short_term_head; |
| dpb_info_t *ps_dpb_node2; |
| WORD32 frame_num_node1; |
| WORD32 frame_num_node2; |
| pic_buf_t *ps_pic_buf; |
| |
| if(ps_dpb_node1 == NULL) |
| return -1; |
| |
| for (; ps_dpb_node1 != NULL; ps_dpb_node1 = ps_dpb_node1->ps_prev_dpb) |
| { |
| for (ps_dpb_node2 = ps_dpb_node1->ps_prev_dpb; ps_dpb_node2 != NULL; ps_dpb_node2 = ps_dpb_node2->ps_prev_dpb) |
| { |
| frame_num_node1 = ps_dpb_node1->ps_pic_buf->i4_frame_num; |
| frame_num_node2 = ps_dpb_node2->ps_pic_buf->i4_frame_num; |
| |
| if(frame_num_node1 > curr_frame_num) |
| frame_num_node1 = frame_num_node1 - max_frame_num; |
| if(frame_num_node2 > curr_frame_num) |
| frame_num_node2 = frame_num_node2 - max_frame_num; |
| |
| if(frame_num_node1 < frame_num_node2) |
| { |
| ps_pic_buf = ps_dpb_node1->ps_pic_buf; |
| ps_dpb_node1->ps_pic_buf = ps_dpb_node2->ps_pic_buf; |
| ps_dpb_node2->ps_pic_buf = ps_pic_buf; |
| } |
| } |
| } |
| |
| /** |
| * For frames and complementary field pairs, |
| * ensure first_field_type appears first in the list |
| */ |
| ps_dpb_node1 = ps_dpb_mgr->ps_dpb_short_term_head; |
| ps_dpb_node2 = ps_dpb_node1->ps_prev_dpb; |
| while(ps_dpb_node2 != NULL) |
| { |
| pic_buf_t *ps_pic_node1 = ps_dpb_node1->ps_pic_buf; |
| pic_buf_t *ps_pic_node2 = ps_dpb_node2->ps_pic_buf; |
| frame_num_node1 = ps_pic_node1->i4_frame_num; |
| frame_num_node2 = ps_pic_node2->i4_frame_num; |
| if(frame_num_node1 == frame_num_node2) |
| { |
| ASSERT(ps_pic_node1->i1_field_type != ps_pic_node2->i1_field_type); |
| if(ps_pic_node1->i1_field_type != first_field_type) |
| { |
| ps_dpb_node1->ps_pic_buf = ps_pic_node2; |
| ps_dpb_node2->ps_pic_buf = ps_pic_node1; |
| } |
| } |
| ps_dpb_node1 = ps_dpb_node2; |
| ps_dpb_node2 = ps_dpb_node2->ps_prev_dpb; |
| } |
| return 0; |
| |
| } |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Function to sort sort term pics by poc for list 0. |
| * |
| * @par Description: |
| * Orders all the pocs less than current poc in the descending order. |
| * Then orders all the pocs greater than current poc in the ascending order. |
| * |
| * @param[in] ps_dpb_mgr |
| * Pointer to the DPB manager structure |
| * |
| * @param[in] curr_poc |
| * Poc of the current pic |
| * |
| * @param[in] first_field_type |
| * For complementary fields, required first field |
| * |
| * @returns |
| * |
| * @remarks |
| * |
| * |
| ******************************************************************************* |
| */ |
| WORD32 ih264_dpb_mgr_sort_short_term_fields_by_poc_l0(dpb_mgr_t *ps_dpb_mgr, |
| WORD32 curr_poc, |
| WORD32 first_field_type) |
| { |
| dpb_info_t *ps_dpb_node1 = ps_dpb_mgr->ps_dpb_short_term_head; |
| dpb_info_t *ps_dpb_node2; |
| WORD32 poc_node1; |
| WORD32 poc_node2; |
| WORD32 frame_num_node1; |
| WORD32 frame_num_node2; |
| pic_buf_t *ps_pic_buf; |
| |
| if(ps_dpb_node1 == NULL) |
| return -1; |
| |
| /** |
| * Sort the fields by poc. |
| * All POCs less than current poc are first placed in the descending order. |
| * Then all POCs greater than current poc are placed in the ascending order. |
| */ |
| for (; ps_dpb_node1 != NULL; ps_dpb_node1 = ps_dpb_node1->ps_prev_dpb) |
| { |
| for (ps_dpb_node2 = ps_dpb_node1->ps_prev_dpb; ps_dpb_node2 != NULL; ps_dpb_node2 = ps_dpb_node2->ps_prev_dpb) |
| { |
| poc_node1 = ps_dpb_node1->ps_pic_buf->i4_abs_poc; |
| poc_node2 = ps_dpb_node2->ps_pic_buf->i4_abs_poc; |
| ASSERT(poc_node1 != curr_poc); |
| ASSERT(poc_node2 != curr_poc); |
| if(((poc_node1 < curr_poc) && (poc_node2 > curr_poc)) || |
| ((poc_node1 < curr_poc) && (poc_node2 < curr_poc) && (poc_node1 > poc_node2)) || |
| ((poc_node1 > curr_poc) && (poc_node2 > curr_poc) && (poc_node1 < poc_node2))) |
| continue; |
| |
| ps_pic_buf = ps_dpb_node1->ps_pic_buf; |
| ps_dpb_node1->ps_pic_buf = ps_dpb_node2->ps_pic_buf; |
| ps_dpb_node2->ps_pic_buf = ps_pic_buf; |
| } |
| } |
| |
| ps_dpb_node1 = ps_dpb_mgr->ps_dpb_short_term_head; |
| ps_dpb_node2 = ps_dpb_node1->ps_prev_dpb; |
| while(ps_dpb_node2 != NULL) |
| { |
| pic_buf_t *ps_pic_node1 = ps_dpb_node1->ps_pic_buf; |
| pic_buf_t *ps_pic_node2 = ps_dpb_node2->ps_pic_buf; |
| frame_num_node1 = ps_pic_node1->i4_frame_num; |
| frame_num_node2 = ps_pic_node2->i4_frame_num; |
| if(frame_num_node1 == frame_num_node2) |
| { |
| ASSERT(ps_pic_node1->i1_field_type != ps_pic_node2->i1_field_type); |
| if(ps_pic_node1->i1_field_type != first_field_type) |
| { |
| ps_dpb_node1->ps_pic_buf = ps_pic_node2; |
| ps_dpb_node2->ps_pic_buf = ps_pic_node1; |
| } |
| } |
| ps_dpb_node1 = ps_dpb_node2; |
| ps_dpb_node2 = ps_dpb_node2->ps_prev_dpb; |
| } |
| return 0; |
| |
| } |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Function to sort sort term pics by poc for list 1. |
| * |
| * @par Description: |
| * Orders all the pocs greater than current poc in the ascending order. |
| * Then rrders all the pocs less than current poc in the descending order. |
| * |
| * @param[in] ps_dpb_mgr |
| * Pointer to the DPB manager structure |
| * |
| * @param[in] curr_poc |
| * Poc of the current pic |
| * |
| * @param[in] first_field_type |
| * For complementary fields, required first field |
| * |
| * @returns |
| * |
| * @remarks |
| * |
| * |
| ******************************************************************************* |
| */ |
| WORD32 ih264_dpb_mgr_sort_short_term_fields_by_poc_l1(dpb_mgr_t *ps_dpb_mgr, |
| WORD32 curr_poc, |
| WORD32 first_field_type) |
| { |
| dpb_info_t *ps_dpb_node1 = ps_dpb_mgr->ps_dpb_short_term_head; |
| dpb_info_t *ps_dpb_node2; |
| WORD32 poc_node1; |
| WORD32 poc_node2; |
| WORD32 frame_num_node1; |
| WORD32 frame_num_node2; |
| pic_buf_t *ps_pic_buf; |
| |
| if(ps_dpb_node1 == NULL) |
| return -1; |
| |
| /** |
| * Sort the fields by poc. |
| * All POCs greater than current poc are first placed in the ascending order. |
| * Then all POCs less than current poc are placed in the decending order. |
| */ |
| for (; ps_dpb_node1 != NULL; ps_dpb_node1 = ps_dpb_node1->ps_prev_dpb) |
| { |
| for (ps_dpb_node2 = ps_dpb_node1->ps_prev_dpb; ps_dpb_node2 != NULL; ps_dpb_node2 = ps_dpb_node2->ps_prev_dpb) |
| { |
| poc_node1 = ps_dpb_node1->ps_pic_buf->i4_abs_poc; |
| poc_node2 = ps_dpb_node2->ps_pic_buf->i4_abs_poc; |
| ASSERT(poc_node1 != curr_poc); |
| ASSERT(poc_node2 != curr_poc); |
| if(((poc_node1 > curr_poc) && (poc_node2 < curr_poc)) || |
| ((poc_node1 < curr_poc) && (poc_node2 < curr_poc) && (poc_node1 > poc_node2)) || |
| ((poc_node1 > curr_poc) && (poc_node2 > curr_poc) && (poc_node1 < poc_node2))) |
| continue; |
| |
| ps_pic_buf = ps_dpb_node1->ps_pic_buf; |
| ps_dpb_node1->ps_pic_buf = ps_dpb_node2->ps_pic_buf; |
| ps_dpb_node2->ps_pic_buf = ps_pic_buf; |
| } |
| } |
| |
| ps_dpb_node1 = ps_dpb_mgr->ps_dpb_short_term_head; |
| ps_dpb_node2 = ps_dpb_node1->ps_prev_dpb; |
| while(ps_dpb_node2 != NULL) |
| { |
| pic_buf_t *ps_pic_node1 = ps_dpb_node1->ps_pic_buf; |
| pic_buf_t *ps_pic_node2 = ps_dpb_node2->ps_pic_buf; |
| frame_num_node1 = ps_pic_node1->i4_frame_num; |
| frame_num_node2 = ps_pic_node2->i4_frame_num; |
| if(frame_num_node1 == frame_num_node2) |
| { |
| ASSERT(ps_pic_node1->i1_field_type != ps_pic_node2->i1_field_type); |
| if(ps_pic_node1->i1_field_type != first_field_type) |
| { |
| ps_dpb_node1->ps_pic_buf = ps_pic_node2; |
| ps_dpb_node2->ps_pic_buf = ps_pic_node1; |
| } |
| } |
| ps_dpb_node1 = ps_dpb_node2; |
| ps_dpb_node2 = ps_dpb_node2->ps_prev_dpb; |
| } |
| return 0; |
| } |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Function to sort long term pics by long term frame idx. |
| * |
| * @par Description: |
| * Sorts long term fields by long term frame idx. For 2 fields |
| * having same frame_num, orders them based on requested first field type. |
| * |
| * @param[in] ps_dpb_mgr |
| * Pointer to the DPB manager structure |
| * |
| * @param[in] first_field_type |
| * For complementary fields, required first field |
| * |
| * @returns |
| * |
| * @remarks |
| * |
| * |
| ******************************************************************************* |
| */ |
| WORD32 ih264_dpb_mgr_sort_long_term_fields_by_frame_idx(dpb_mgr_t *ps_dpb_mgr, |
| WORD32 first_field_type) |
| { |
| dpb_info_t *ps_dpb_node1 = ps_dpb_mgr->ps_dpb_long_term_head; |
| dpb_info_t *ps_dpb_node2; |
| WORD32 frame_idx_node1; |
| WORD32 frame_idx_node2; |
| pic_buf_t *ps_pic_buf; |
| |
| if(ps_dpb_node1 == NULL) |
| return -1; |
| |
| /* Sort the fields by frame idx */ |
| for (; ps_dpb_node1 != NULL; ps_dpb_node1 = ps_dpb_node1->ps_prev_dpb) |
| { |
| for (ps_dpb_node2 = ps_dpb_node1->ps_prev_dpb; ps_dpb_node2 != NULL; ps_dpb_node2 = ps_dpb_node2->ps_prev_dpb) |
| { |
| frame_idx_node1 = ps_dpb_node1->ps_pic_buf->i4_long_term_frame_idx; |
| frame_idx_node2 = ps_dpb_node2->ps_pic_buf->i4_long_term_frame_idx; |
| |
| if(frame_idx_node1 > frame_idx_node2) |
| { |
| ps_pic_buf = ps_dpb_node1->ps_pic_buf; |
| ps_dpb_node1->ps_pic_buf = ps_dpb_node2->ps_pic_buf; |
| ps_dpb_node2->ps_pic_buf = ps_pic_buf; |
| } |
| } |
| } |
| |
| /** |
| * For frames and complementary field pairs, |
| * ensure first_field_type appears first in the list |
| */ |
| ps_dpb_node1 = ps_dpb_mgr->ps_dpb_long_term_head; |
| ps_dpb_node2 = ps_dpb_node1->ps_prev_dpb; |
| while(ps_dpb_node2 != NULL) |
| { |
| pic_buf_t *ps_pic_node1 = ps_dpb_node1->ps_pic_buf; |
| pic_buf_t *ps_pic_node2 = ps_dpb_node2->ps_pic_buf; |
| frame_idx_node1 = ps_pic_node1->i4_long_term_frame_idx; |
| frame_idx_node2 = ps_pic_node2->i4_long_term_frame_idx; |
| if(frame_idx_node1 == frame_idx_node2) |
| { |
| ASSERT(ps_pic_node1->i1_field_type != ps_pic_node2->i1_field_type); |
| if(ps_pic_node1->i1_field_type != first_field_type) |
| { |
| ps_dpb_node1->ps_pic_buf = ps_pic_node2; |
| ps_dpb_node2->ps_pic_buf = ps_pic_node1; |
| } |
| } |
| ps_dpb_node1 = ps_dpb_node2; |
| ps_dpb_node2 = ps_dpb_node2->ps_prev_dpb; |
| } |
| return 0; |
| } |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Function to alternate fields. |
| * |
| * @par Description: |
| * In the ordered list of fields, alternate fields starting with |
| * first_field_type |
| * |
| * @param[in] ps_dpb_mgr |
| * Pointer to the DPB manager structure |
| * |
| * @param[in] reference_type |
| * This is used to select between short-term and long-term linked list. |
| * |
| * @param[in] first_field_type |
| * For complementary fields, required first field |
| * |
| * @returns |
| * |
| * @remarks |
| * |
| * |
| ******************************************************************************* |
| */ |
| WORD32 ih264_dpb_mgr_alternate_ref_fields(dpb_mgr_t *ps_dpb_mgr, |
| WORD32 reference_type, |
| WORD32 first_field_type) |
| { |
| dpb_info_t s_dpb_head; |
| dpb_info_t *ps_dpb_head; |
| dpb_info_t *ps_dpb_node1; |
| dpb_info_t *ps_dpb_node2; |
| dpb_info_t *ps_dpb_node3; |
| dpb_info_t *ps_dpb_node4; |
| WORD32 expected_field; |
| |
| expected_field = first_field_type; |
| |
| ps_dpb_head = &s_dpb_head; |
| |
| ps_dpb_head->ps_prev_dpb = (reference_type == SHORT_TERM_REF) ? |
| ps_dpb_mgr->ps_dpb_short_term_head: |
| ps_dpb_mgr->ps_dpb_long_term_head; |
| |
| ps_dpb_node1 = ps_dpb_head; |
| ps_dpb_node2 = ps_dpb_node1->ps_prev_dpb; |
| while(ps_dpb_node2 != NULL) |
| { |
| pic_buf_t *ps_pic_node2 = ps_dpb_node2->ps_pic_buf; |
| if(ps_pic_node2->i1_field_type != expected_field) |
| { |
| /* |
| * If it is not expected field, loop over the node till |
| * the expected field. |
| */ |
| ps_dpb_node3 = ps_dpb_node2; |
| ps_dpb_node4 = ps_dpb_node2->ps_prev_dpb; |
| while((ps_dpb_node4 != NULL) && |
| (ps_dpb_node4->ps_pic_buf->i1_field_type != expected_field)) |
| { |
| ps_dpb_node3 = ps_dpb_node4; |
| ps_dpb_node4 = ps_dpb_node4->ps_prev_dpb; |
| } |
| if(ps_dpb_node4 != NULL) |
| { |
| ps_dpb_node1->ps_prev_dpb = ps_dpb_node4; |
| ps_dpb_node3->ps_prev_dpb = ps_dpb_node4->ps_prev_dpb; |
| ps_dpb_node4->ps_prev_dpb = ps_dpb_node2; |
| } |
| else |
| { |
| /* node4 null means we have reached the end */ |
| break; |
| } |
| } |
| ps_dpb_node1 = ps_dpb_node1->ps_prev_dpb; |
| ps_dpb_node2 = ps_dpb_node1->ps_prev_dpb; |
| expected_field = (ps_dpb_node1->ps_pic_buf->i1_field_type == TOP_FIELD)? |
| BOTTOM_FIELD:TOP_FIELD; |
| } |
| |
| if(reference_type == SHORT_TERM_REF) |
| { |
| ps_dpb_mgr->ps_dpb_short_term_head = ps_dpb_head->ps_prev_dpb; |
| } |
| else |
| { |
| ps_dpb_mgr->ps_dpb_long_term_head = ps_dpb_head->ps_prev_dpb; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Add a ref field to short-term or long-term linked list. |
| * |
| * @par Description: |
| * This function adds a ref field to either short-term or long-term linked |
| * list. It picks up memory for the link from the array of dpb_info in |
| * dpb_mgr. The field is added to the beginning of the linked list and the |
| * head is set the the field. |
| * |
| * @param[in] ps_dpb_mgr |
| * Pointer to the DPB manager structure |
| * |
| * @param[in] ps_pic_buf |
| * Pic buf structure for the field being added. |
| * |
| * @param[in] reference_type |
| * This is used to select between short-term and long-term linked list. |
| * |
| * @param[in] frame_num |
| * frame_num for the field. |
| * |
| * @param[in] long_term_frame_idx |
| * If the ref being added is long-term, long_term_frame_idx of the field. |
| * Otherwise invalid. |
| * |
| * @returns |
| * |
| * @remarks |
| * |
| * |
| ******************************************************************************* |
| */ |
| WORD32 ih264_dpb_mgr_insert_ref_field(dpb_mgr_t *ps_dpb_mgr, |
| pic_buf_t *ps_pic_buf, |
| WORD32 reference_type, |
| UWORD32 frame_num, |
| WORD32 long_term_frame_idx) |
| { |
| WORD32 i; |
| dpb_info_t *ps_dpb_info; |
| dpb_info_t *ps_dpb_head; |
| |
| ps_dpb_info = ps_dpb_mgr->as_dpb_info; |
| |
| /* Return error if buffer is already present in the DPB */ |
| for(i = 0; i < MAX_DPB_BUFS; i++) |
| { |
| if( (ps_dpb_info[i].ps_pic_buf == ps_pic_buf) |
| && (ps_dpb_info[i].ps_pic_buf->i4_used_as_ref == reference_type) ) |
| { |
| return (-1); |
| } |
| } |
| |
| /* Find an unused DPB location */ |
| for(i = 0; i < MAX_DPB_BUFS; i++) |
| { |
| if(NULL == ps_dpb_info[i].ps_pic_buf) |
| { |
| break; |
| } |
| } |
| if(i == MAX_DPB_BUFS) |
| { |
| return (-1); |
| } |
| |
| ps_dpb_head = (reference_type == SHORT_TERM_REF) |
| ?ps_dpb_mgr->ps_dpb_short_term_head |
| :ps_dpb_mgr->ps_dpb_long_term_head; |
| |
| if(reference_type == SHORT_TERM_REF) |
| long_term_frame_idx = -1; |
| |
| /* Create DPB info */ |
| ps_dpb_info[i].ps_pic_buf = ps_pic_buf; |
| ps_dpb_info[i].ps_prev_dpb = ps_dpb_head; |
| ps_dpb_info[i].ps_pic_buf->i4_used_as_ref = reference_type; |
| ps_dpb_info[i].ps_pic_buf->i4_frame_num = frame_num; |
| ps_dpb_info[i].ps_pic_buf->i4_long_term_frame_idx = long_term_frame_idx; |
| |
| /* update the head node of linked list to point to the current picture */ |
| if(reference_type == SHORT_TERM_REF) |
| { |
| ps_dpb_mgr->ps_dpb_short_term_head = ps_dpb_info + i; |
| |
| /* Increment Short term buffer count */ |
| ps_dpb_mgr->u1_num_short_term_ref_bufs++; |
| |
| } |
| else |
| { |
| ps_dpb_mgr->ps_dpb_long_term_head = ps_dpb_info + i; |
| |
| /* Increment Long term buffer count */ |
| ps_dpb_mgr->u1_num_long_term_ref_bufs++; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Add a ref frame to short-term or long-term linked list. |
| * |
| * @par Description: |
| * This function adds a ref frame to either short-term or long-term linked |
| * list. Internally it calls add ref field twice to add top and bottom field. |
| * |
| * @param[in] ps_dpb_mgr |
| * Pointer to the DPB manager structure |
| * |
| * @param[in] ps_pic_buf |
| * Pic buf structure for the field being added. |
| * |
| * @param[in] reference_type |
| * This is used to select between short-term and long-term linked list. |
| * |
| * @param[in] frame_num |
| * frame_num for the field. |
| * |
| * @param[in] long_term_frame_idx |
| * If the ref being added is long-term, long_term_frame_idx of the field. |
| * Otherwise invalid. |
| * |
| * @returns |
| * |
| * @remarks |
| * |
| * |
| ******************************************************************************* |
| */ |
| WORD32 ih264_dpb_mgr_insert_ref_frame(dpb_mgr_t *ps_dpb_mgr, |
| pic_buf_t *ps_pic_buf, |
| WORD32 reference_type, |
| UWORD32 frame_num, |
| WORD32 long_term_frame_idx) |
| { |
| WORD32 buf_id; |
| pic_buf_t *ps_pic_top; |
| pic_buf_t *ps_pic_bottom; |
| WORD32 ret; |
| |
| /* |
| * For a frame, since the ps_pic_buf passed to this function is that of top field |
| * obtain bottom field using buf_id. |
| */ |
| ps_pic_top = ps_pic_buf; |
| buf_id = ps_pic_top->i4_buf_id; |
| ps_pic_bottom = &ps_dpb_mgr->as_bottom_field_pics[buf_id]; |
| |
| /* Insert top field */ |
| ret = ih264_dpb_mgr_insert_ref_field(ps_dpb_mgr, |
| ps_pic_top, |
| reference_type, |
| frame_num, |
| long_term_frame_idx); |
| |
| if(ret != 0) |
| return ret; |
| |
| /* Insert bottom field */ |
| ret = ih264_dpb_mgr_insert_ref_field(ps_dpb_mgr, |
| ps_pic_bottom, |
| reference_type, |
| frame_num, |
| long_term_frame_idx); |
| |
| if(ret != 0) |
| return ret; |
| |
| return ret; |
| } |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Returns the number of ref frames in both the linked list. |
| * |
| * @par Description: |
| * Returns the count of number of frames, number of complementary field pairs |
| * and number of unpaired fields. |
| * |
| * @param[in] ps_dpb_mgr |
| * Pointer to the DPB manager structure |
| * |
| * @param[in] curr_frame_num |
| * frame_num for the field. |
| * |
| * @param[in] max_frame_num |
| * Maximum frame_num allowed |
| * |
| * @returns |
| * |
| * @remarks |
| * |
| * |
| ******************************************************************************* |
| */ |
| WORD32 ih264_dpb_mgr_count_ref_frames(dpb_mgr_t *ps_dpb_mgr, |
| WORD32 curr_frame_num, |
| WORD32 max_frame_num) |
| { |
| WORD32 numShortTerm = 0; |
| WORD32 numLongTerm = 0; |
| dpb_info_t *ps_dpb_node; |
| WORD32 frame_num; |
| WORD32 prev_frame_num; |
| |
| /* |
| * Compute the number of short-term frames/complementary field pairs/ |
| * unpaired fields |
| */ |
| if(ps_dpb_mgr->ps_dpb_short_term_head != NULL) |
| { |
| /* Sort the short-term list by frame_num */ |
| ih264_dpb_mgr_sort_short_term_fields_by_frame_num(ps_dpb_mgr, |
| curr_frame_num, |
| TOP_FIELD, |
| max_frame_num); |
| |
| ps_dpb_node = ps_dpb_mgr->ps_dpb_short_term_head; |
| if(ps_dpb_node != NULL) |
| { |
| numShortTerm++; |
| prev_frame_num = ps_dpb_node->ps_pic_buf->i4_frame_num; |
| ps_dpb_node = ps_dpb_node->ps_prev_dpb; |
| } |
| |
| while(ps_dpb_node != NULL) |
| { |
| frame_num = ps_dpb_node->ps_pic_buf->i4_frame_num; |
| if(frame_num != prev_frame_num) |
| numShortTerm++; |
| prev_frame_num = ps_dpb_node->ps_pic_buf->i4_frame_num; |
| ps_dpb_node = ps_dpb_node->ps_prev_dpb; |
| } |
| } |
| |
| /* |
| * Compute the number of long-term frames/complementary field pairs/ |
| * unpaired fields |
| */ |
| if(ps_dpb_mgr->ps_dpb_long_term_head != NULL) |
| { |
| ih264_dpb_mgr_sort_long_term_fields_by_frame_idx(ps_dpb_mgr, |
| TOP_FIELD); |
| |
| ps_dpb_node = ps_dpb_mgr->ps_dpb_long_term_head; |
| if(ps_dpb_node != NULL) |
| { |
| numLongTerm++; |
| prev_frame_num = ps_dpb_node->ps_pic_buf->i4_frame_num; |
| ps_dpb_node = ps_dpb_node->ps_prev_dpb; |
| } |
| |
| while(ps_dpb_node != NULL) |
| { |
| frame_num = ps_dpb_node->ps_pic_buf->i4_frame_num; |
| if(frame_num != prev_frame_num) |
| numLongTerm++; |
| prev_frame_num = ps_dpb_node->ps_pic_buf->i4_frame_num; |
| ps_dpb_node = ps_dpb_node->ps_prev_dpb; |
| } |
| } |
| return (numShortTerm + numLongTerm); |
| } |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Deletes the ref frame at the end of the linked list. |
| * |
| * @par Description: |
| * Deletes the ref frame at the end of the linked list. For unpaired fields, |
| * it deletes just the last node. For frame or complementary field pair, it |
| * deletes the last two nodes. |
| * |
| * @param[in] ps_dpb_mgr |
| * Pointer to the DPB manager structure |
| * |
| * @param[in] reference_type |
| * This is used to select between short-term and long-term linked list. |
| * |
| * @returns |
| * |
| * @remarks |
| * |
| * |
| ******************************************************************************* |
| */ |
| WORD32 ih264_dpb_mgr_delete_ref_frame(dpb_mgr_t *ps_dpb_mgr, |
| WORD32 reference_type) |
| { |
| dpb_info_t *ps_dpb_node1; |
| dpb_info_t *ps_dpb_node2; |
| dpb_info_t *ps_dpb_node3; |
| |
| /* |
| * Assumption: The nodes sorted for frame num. |
| */ |
| |
| |
| /* Select bw short-term and long-term list. */ |
| ps_dpb_node1 = (reference_type == SHORT_TERM_REF) |
| ?ps_dpb_mgr->ps_dpb_short_term_head |
| :ps_dpb_mgr->ps_dpb_long_term_head; |
| /* If null, no entries in the list. Hence return. */ |
| if(ps_dpb_node1 == NULL) |
| return 0; |
| |
| /* If only one node in the list, set as unsed for refer and return. */ |
| if(ps_dpb_node1->ps_prev_dpb == NULL) |
| { |
| /* Set the picture as unused for reference */ |
| ps_dpb_node1->ps_pic_buf->i4_used_as_ref = UNUSED_FOR_REF; |
| ps_dpb_node1->ps_pic_buf = NULL; |
| |
| if(reference_type == SHORT_TERM_REF) |
| { |
| ps_dpb_mgr->ps_dpb_short_term_head = NULL; |
| |
| /* Increment Short term buffer count */ |
| ps_dpb_mgr->u1_num_short_term_ref_bufs = 0; |
| |
| } |
| else |
| { |
| ps_dpb_mgr->ps_dpb_long_term_head = NULL; |
| |
| /* Increment Long term buffer count */ |
| ps_dpb_mgr->u1_num_long_term_ref_bufs = 0; |
| |
| } |
| return 0; |
| } |
| |
| /** |
| * If there are only 2 nodes in the list, set second node as unused for reference. |
| * If the frame_num of second node and first node is same, set first node also as |
| * unused for reference and set the corresponding head to NULL. |
| */ |
| ps_dpb_node2 = ps_dpb_node1->ps_prev_dpb; |
| if(ps_dpb_node2->ps_prev_dpb == NULL) |
| { |
| /* Set the picture as unused for reference */ |
| if(ps_dpb_node2->ps_pic_buf->i4_frame_num == ps_dpb_node1->ps_pic_buf->i4_frame_num) |
| { |
| /* Set the picture as unused for reference */ |
| ps_dpb_node1->ps_pic_buf->i4_used_as_ref = UNUSED_FOR_REF; |
| ps_dpb_node1->ps_pic_buf = NULL; |
| if(reference_type == SHORT_TERM_REF) |
| { |
| ps_dpb_mgr->ps_dpb_short_term_head = NULL; |
| |
| /* Increment Short term buffer count */ |
| ps_dpb_mgr->u1_num_short_term_ref_bufs = 0; |
| |
| } |
| else |
| { |
| ps_dpb_mgr->ps_dpb_long_term_head = NULL; |
| |
| /* Increment Long term buffer count */ |
| ps_dpb_mgr->u1_num_long_term_ref_bufs = 0; |
| |
| } |
| |
| } |
| ps_dpb_node2->ps_pic_buf->i4_used_as_ref = UNUSED_FOR_REF; |
| ps_dpb_node2->ps_pic_buf = NULL; |
| ps_dpb_node1->ps_prev_dpb = NULL; |
| return 0; |
| } |
| /* |
| * If there are more than 2 nodes, run a loop to get the last 3 nodes. |
| */ |
| ps_dpb_node3 = ps_dpb_node2->ps_prev_dpb; |
| while(ps_dpb_node3->ps_prev_dpb != NULL) |
| { |
| ps_dpb_node1 = ps_dpb_node2; |
| ps_dpb_node2 = ps_dpb_node3; |
| ps_dpb_node3 = ps_dpb_node3->ps_prev_dpb; |
| } |
| /* |
| * If node 2 and node 3 frame_nums are same, set node 2 also as unsed for |
| * reference and del reference from node1. |
| */ |
| if(ps_dpb_node2->ps_pic_buf->i4_frame_num == ps_dpb_node3->ps_pic_buf->i4_frame_num) |
| { |
| ps_dpb_node2->ps_pic_buf->i4_used_as_ref = UNUSED_FOR_REF; |
| ps_dpb_node2->ps_pic_buf = NULL; |
| ps_dpb_node1->ps_prev_dpb = NULL; |
| |
| } |
| /* Set the third node as unused for reference */ |
| ps_dpb_node3->ps_pic_buf->i4_used_as_ref = UNUSED_FOR_REF; |
| ps_dpb_node3->ps_pic_buf = NULL; |
| ps_dpb_node2->ps_prev_dpb = NULL; |
| |
| return 0; |
| } |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Delete long-term ref fields above max frame idx. |
| * |
| * @par Description: |
| * Deletes all the long-term ref fields having idx greater than max_frame_idx |
| * |
| * @param[in] ps_dpb_mgr |
| * Pointer to the DPB manager structure |
| * |
| * @param[in] max_frame_idx |
| * Max long-term frame idx allowed. |
| * |
| * @returns |
| * |
| * @remarks |
| * |
| * |
| ******************************************************************************* |
| */ |
| WORD32 ih264_dpb_mgr_delete_long_ref_fields_max_frame_idx(dpb_mgr_t *ps_dpb_mgr, |
| WORD32 max_frame_idx) |
| { |
| dpb_info_t *ps_dpb_node1; |
| dpb_info_t *ps_dpb_node2; |
| /* |
| * Loop until there is node which isn't to be deleted is encountered. |
| */ |
| while(ps_dpb_mgr->ps_dpb_long_term_head != NULL) |
| { |
| if(ps_dpb_mgr->ps_dpb_long_term_head->ps_pic_buf->i4_long_term_frame_idx |
| <= max_frame_idx) |
| { |
| break; |
| } |
| ps_dpb_mgr->ps_dpb_long_term_head->ps_pic_buf->i4_used_as_ref = UNUSED_FOR_REF; |
| ps_dpb_mgr->ps_dpb_long_term_head->ps_pic_buf = NULL; |
| ps_dpb_mgr->ps_dpb_long_term_head = ps_dpb_mgr->ps_dpb_long_term_head->ps_prev_dpb; |
| } |
| |
| ps_dpb_node1 = ps_dpb_mgr->ps_dpb_long_term_head; |
| if(ps_dpb_node1 == NULL) |
| return 0; |
| /* |
| * With the node that isn't to be deleted as head, loop until the end. |
| */ |
| ps_dpb_node2 = ps_dpb_node1->ps_prev_dpb; |
| while(ps_dpb_node2 != NULL) |
| { |
| if(ps_dpb_node2->ps_pic_buf->i4_long_term_frame_idx > max_frame_idx) |
| { |
| ps_dpb_node2->ps_pic_buf->i4_used_as_ref = UNUSED_FOR_REF; |
| ps_dpb_node2->ps_pic_buf = NULL; |
| ps_dpb_node1->ps_prev_dpb = ps_dpb_node2->ps_prev_dpb; |
| } |
| ps_dpb_node1 = ps_dpb_node1->ps_prev_dpb; |
| if(ps_dpb_node1 == NULL) |
| break; |
| ps_dpb_node2 = ps_dpb_node1->ps_prev_dpb; |
| } |
| return 0; |
| } |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Deletes the short-term with least frame_num |
| * |
| * @par Description: |
| * Deletes the short-term with least frame_num. It sorts the function the |
| * short-term linked list by frame-num and the function that deletes the last |
| * frame in the linked list. |
| * |
| * @param[in] ps_dpb_mgr |
| * Pointer to the DPB manager structure |
| * |
| * @param[in] curr_frame_num |
| * frame_num of the current pic |
| * |
| * @param[in] max_frame_num |
| * Maximum frame_num allowed |
| * |
| * @returns |
| * |
| * @remarks |
| * |
| * |
| ******************************************************************************* |
| */ |
| WORD32 ih264_dpb_mgr_delete_short_ref_frame(dpb_mgr_t *ps_dpb_mgr, |
| WORD32 curr_frame_num, |
| WORD32 max_frame_num) |
| { |
| WORD32 ret; |
| /* Sort the short-term list by frame_num */ |
| ret = ih264_dpb_mgr_sort_short_term_fields_by_frame_num(ps_dpb_mgr, |
| curr_frame_num, |
| TOP_FIELD, |
| max_frame_num); |
| |
| /* Delete the last reference frame or field */ |
| ret = ih264_dpb_mgr_delete_ref_frame(ps_dpb_mgr,SHORT_TERM_REF); |
| |
| if(ret != 0) |
| { |
| ASSERT(0); |
| } |
| |
| return ret; |
| } |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * Deletes all the ref frames. |
| * |
| * @par Description: |
| * Deletes all of the ref frames/fields in the short-term and long-term linked |
| * list. |
| * |
| * @param[in] ps_dpb_mgr |
| * Pointer to the DPB manager structure |
| * |
| * @returns |
| * |
| * @remarks |
| * |
| * |
| ******************************************************************************* |
| */ |
| WORD32 ih264_dpb_mgr_delete_all_ref_frames(dpb_mgr_t *ps_dpb_mgr) |
| { |
| /* Loop over short-term linked list. */ |
| while(ps_dpb_mgr->ps_dpb_short_term_head != NULL) |
| { |
| ih264_dpb_mgr_delete_ref_frame(ps_dpb_mgr,SHORT_TERM_REF); |
| } |
| |
| /* Loop over long-term linked list. */ |
| while(ps_dpb_mgr->ps_dpb_long_term_head != NULL) |
| { |
| ih264_dpb_mgr_delete_ref_frame(ps_dpb_mgr,LONG_TERM_REF); |
| } |
| return 0; |
| } |
| |
| |
| void ih264_dpb_mgr_reset(dpb_mgr_t *ps_dpb_mgr, buf_mgr_t *ps_buf_mgr) |
| { |
| WORD32 i; |
| dpb_info_t *ps_dpb_info; |
| ASSERT(0); |
| |
| |
| ps_dpb_info = ps_dpb_mgr->as_dpb_info; |
| |
| for(i = 0; i < MAX_DPB_BUFS; i++) |
| { |
| if(ps_dpb_info[i].ps_pic_buf->i4_used_as_ref) |
| { |
| ps_dpb_info[i].ps_pic_buf->i4_used_as_ref = UNUSED_FOR_REF; |
| ps_dpb_info[i].ps_prev_dpb = NULL; |
| //Release physical buffer |
| ih264_buf_mgr_release(ps_buf_mgr, ps_dpb_info[i].ps_pic_buf->i4_buf_id, |
| BUF_MGR_REF); |
| |
| ps_dpb_info[i].ps_pic_buf = NULL; |
| } |
| } |
| ps_dpb_mgr->u1_num_short_term_ref_bufs = 0; |
| ps_dpb_mgr->u1_num_long_term_ref_bufs = 0; |
| ps_dpb_mgr->ps_dpb_short_term_head = NULL; |
| ps_dpb_mgr->ps_dpb_long_term_head = NULL; |
| |
| } |
| |
| /** |
| ******************************************************************************* |
| * |
| * @brief |
| * deletes all pictures from DPB |
| * |
| * @par Description: |
| * Deletes all pictures present in the DPB manager |
| * |
| * @param[in] ps_buf_mgr |
| * Pointer to buffer manager structure |
| * |
| * @param[in] u1_disp_bufs |
| * Number of buffers to be deleted |
| * |
| * @returns |
| * |
| * @remarks |
| * |
| * |
| ******************************************************************************* |
| */ |
| |
| void ih264_dpb_mgr_release_pics(buf_mgr_t *ps_buf_mgr, UWORD8 u1_disp_bufs) |
| { |
| WORD8 i; |
| UWORD32 buf_status; |
| ASSERT(0); |
| |
| for(i = 0; i < u1_disp_bufs; i++) |
| { |
| buf_status = ih264_buf_mgr_get_status(ps_buf_mgr, i); |
| if(0 != buf_status) |
| { |
| ih264_buf_mgr_release((buf_mgr_t *)ps_buf_mgr, i, BUF_MGR_REF); |
| } |
| } |
| } |