/******************************************************************************
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* *
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*****************************************************************************
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* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <ixheaacd_type_def.h>
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#include "ixheaacd_interface.h"
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#include "ixheaacd_bitbuffer.h"
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#include "ixheaacd_info.h"
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#include "ixheaacd_bitbuffer.h"
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WORD32 ixheaacd_qsort_cmp(const VOID *va, const VOID *vb) {
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const ia_huff_code_word_struct *huff1, *huff2;
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huff1 = (ia_huff_code_word_struct *)va;
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huff2 = (ia_huff_code_word_struct *)vb;
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if (huff1->len < huff2->len) return -1;
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if ((huff1->len == huff2->len) && (huff1->code_word < huff2->code_word))
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return -1;
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return 1;
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}
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VOID ixheaacd_hufftab(ia_huff_code_book_struct *ptr_huff_code_book,
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ia_huff_code_word_struct *ptr_huff_code_word,
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WORD16 *code_book_tbl, WORD32 *index, WORD32 dim,
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WORD32 lav, WORD32 lav_incr_esc, WORD32 sign_code_book,
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UWORD8 max_code_word_len) {
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WORD32 i, num;
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if (!sign_code_book) {
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ptr_huff_code_book->huff_mode = lav + 1;
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ptr_huff_code_book->off = 0;
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} else {
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ptr_huff_code_book->huff_mode = 2 * lav + 1;
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ptr_huff_code_book->off = lav;
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}
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num = 1;
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for (i = 0; i < dim; i++) num *= ptr_huff_code_book->huff_mode;
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ptr_huff_code_book->num = num;
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ptr_huff_code_book->dim = dim;
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ptr_huff_code_book->lav = lav;
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ptr_huff_code_book->lav_incr_esc = lav_incr_esc;
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ptr_huff_code_book->sign_code_book = sign_code_book;
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ptr_huff_code_book->pstr_huff_code_word = ptr_huff_code_word;
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ptr_huff_code_book->code_book_tbl = code_book_tbl;
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ptr_huff_code_book->idx_tbl = index;
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ptr_huff_code_book->max_code_word_len = max_code_word_len;
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qsort(ptr_huff_code_word, num, sizeof(ia_huff_code_word_struct),
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ixheaacd_qsort_cmp);
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}
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WORD32 ixheaacd_huff_codeword(ia_huff_code_word_struct *ptr_huff_code_word,
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UWORD16 data_present,
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ia_bit_buf_struct *it_bit_buff)
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{
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WORD32 i, j;
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UWORD32 code_word = 0;
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UWORD32 tmp = 0;
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i = ptr_huff_code_word->len;
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if (data_present == 0) {
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code_word = ixheaacd_read_bits_buf(it_bit_buff, i);
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}
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if (data_present == 1) {
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code_word = ixheaacd_read_bits_buf(it_bit_buff, i);
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}
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while (code_word != ptr_huff_code_word->code_word) {
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ptr_huff_code_word++;
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j = ptr_huff_code_word->len - i;
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if (j < 0) {
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return ptr_huff_code_word->index;
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}
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i += j;
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code_word <<= j;
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if (data_present == 0) {
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tmp = ixheaacd_read_bits_buf(it_bit_buff, j);
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}
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if (data_present == 1) {
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tmp = ixheaacd_read_bits_buf(it_bit_buff, j);
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}
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code_word |= tmp;
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}
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return (ptr_huff_code_word->index);
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}
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