1 /******************************************************************************
2 * *
3 * Copyright (C) 2018 The Android Open Source Project
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 *****************************************************************************
18 * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
19 */
20 #include "ixheaacd_sbr_common.h"
21 #include <ixheaacd_type_def.h>
22
23 #include "ixheaacd_constants.h"
24 #include <ixheaacd_basic_ops32.h>
25 #include <ixheaacd_basic_ops16.h>
26 #include <ixheaacd_basic_ops40.h>
27 #include "ixheaacd_basic_ops.h"
28
29 #include <ixheaacd_basic_op.h>
30 #include "ixheaacd_intrinsics.h"
31 #include "ixheaacd_bitbuffer.h"
32
33 #include "ixheaacd_adts_crc_check.h"
34
ixheaacd_byte_align(ia_bit_buf_struct * it_bit_buff,WORD32 * align_bits_cnt)35 VOID ixheaacd_byte_align(ia_bit_buf_struct *it_bit_buff,
36 WORD32 *align_bits_cnt) {
37 WORD alignment;
38 alignment = (WORD)((*align_bits_cnt - it_bit_buff->cnt_bits) & 0x07);
39
40 if (alignment) {
41 ixheaacd_read_bits_buf(it_bit_buff, (8 - alignment));
42 }
43
44 *align_bits_cnt = it_bit_buff->cnt_bits;
45 }
46
ixheaacd_show_bits_buf(ia_bit_buf_struct * it_bit_buff,WORD no_of_bits)47 WORD32 ixheaacd_show_bits_buf(ia_bit_buf_struct *it_bit_buff, WORD no_of_bits) {
48 UWORD32 ret_val;
49 UWORD8 *ptr_read_next = it_bit_buff->ptr_read_next;
50 WORD bit_pos = it_bit_buff->bit_pos;
51
52 ret_val = (UWORD32)*ptr_read_next;
53
54 bit_pos -= no_of_bits;
55 while (bit_pos < 0) {
56 bit_pos += 8;
57 ptr_read_next++;
58
59 if (ptr_read_next > it_bit_buff->ptr_bit_buf_end) {
60 ptr_read_next = it_bit_buff->ptr_bit_buf_base;
61 }
62
63 ret_val <<= 8;
64
65 ret_val |= (UWORD32)*ptr_read_next;
66 }
67
68 ret_val = ret_val << ((31 - no_of_bits) - bit_pos) >> (32 - no_of_bits);
69
70 return ret_val;
71 }
72
ixheaacd_read_bits_buf(ia_bit_buf_struct * it_bit_buff,WORD no_of_bits)73 WORD32 ixheaacd_read_bits_buf(ia_bit_buf_struct *it_bit_buff, WORD no_of_bits) {
74 UWORD32 ret_val;
75 UWORD8 *ptr_read_next = it_bit_buff->ptr_read_next;
76 WORD bit_pos = it_bit_buff->bit_pos;
77
78 if (no_of_bits == 0) {
79 return 0;
80 }
81
82 it_bit_buff->cnt_bits -= no_of_bits;
83 ret_val = (UWORD32)*ptr_read_next;
84
85 bit_pos -= no_of_bits;
86 while (bit_pos < 0) {
87 bit_pos += 8;
88 ptr_read_next++;
89
90 if (ptr_read_next > it_bit_buff->ptr_bit_buf_end) {
91 ptr_read_next = it_bit_buff->ptr_bit_buf_base;
92 }
93
94 ret_val <<= 8;
95
96 ret_val |= (UWORD32)*ptr_read_next;
97 }
98
99 ret_val = ret_val << ((31 - no_of_bits) - bit_pos) >> (32 - no_of_bits);
100 it_bit_buff->ptr_read_next = ptr_read_next;
101 it_bit_buff->bit_pos = (WORD16)bit_pos;
102 return ret_val;
103 }
104
ixheaacd_aac_read_byte(UWORD8 ** ptr_read_next,WORD32 * bit_pos,WORD32 * readword)105 UWORD32 ixheaacd_aac_read_byte(UWORD8 **ptr_read_next, WORD32 *bit_pos,
106 WORD32 *readword) {
107 UWORD8 *v = *ptr_read_next;
108 WORD32 bits_consumed = *bit_pos;
109
110 if ((bits_consumed -= 8) >= 0) {
111 *readword = (*readword << 8) | *v;
112 v++;
113 } else {
114 bits_consumed += 8;
115 }
116 *bit_pos = bits_consumed;
117 *ptr_read_next = v;
118 return 1;
119 }
120
ixheaacd_aac_read_2bytes(UWORD8 ** ptr_read_next,WORD32 * bit_pos,WORD32 * readword)121 UWORD32 ixheaacd_aac_read_2bytes(UWORD8 **ptr_read_next, WORD32 *bit_pos,
122 WORD32 *readword) {
123 UWORD8 *v = *ptr_read_next;
124 WORD32 bits_consumed = *bit_pos;
125
126 if ((bits_consumed - 16) >= 0) {
127 *readword = (*readword << 8) | *v;
128 v++;
129 *readword = (*readword << 8) | *v;
130 v++;
131 bits_consumed -= 16;
132
133 } else if ((bits_consumed - 8) >= 0) {
134 *readword = (*readword << 8) | *v;
135 v++;
136 bits_consumed -= 8;
137 }
138
139 *bit_pos = bits_consumed;
140 *ptr_read_next = v;
141 return 1;
142 }
143
ixheaacd_aac_read_byte_corr1(UWORD8 ** ptr_read_next,WORD16 * ptr_bit_pos,WORD32 * readword)144 UWORD32 ixheaacd_aac_read_byte_corr1(UWORD8 **ptr_read_next,
145 WORD16 *ptr_bit_pos, WORD32 *readword) {
146 UWORD8 *v = *ptr_read_next;
147 WORD16 bits_consumed = *ptr_bit_pos;
148
149 while (bits_consumed >= 8) {
150 if ((bits_consumed -= 8) >= 0) {
151 {
152 *readword = (*readword << 8) | *v;
153 v++;
154 }
155 } else {
156 bits_consumed += 8;
157 }
158 }
159 *ptr_bit_pos = bits_consumed;
160 *ptr_read_next = v;
161 return 1;
162 }
163
ixheaacd_aac_read_byte_corr(UWORD8 ** ptr_read_next,WORD32 * ptr_bit_pos,WORD32 * readword,UWORD8 * p_bit_buf_end)164 UWORD32 ixheaacd_aac_read_byte_corr(UWORD8 **ptr_read_next, WORD32 *ptr_bit_pos,
165 WORD32 *readword, UWORD8 *p_bit_buf_end) {
166 UWORD8 *v = *ptr_read_next;
167 WORD32 bits_consumed = *ptr_bit_pos;
168
169 if ((bits_consumed -= 8) >= 0) {
170 if (p_bit_buf_end < v)
171 bits_consumed += 8;
172 else {
173 *readword = (*readword << 8) | *v;
174 v++;
175 }
176 } else {
177 bits_consumed += 8;
178 }
179 *ptr_bit_pos = bits_consumed;
180 *ptr_read_next = v;
181 return 1;
182 }
183
ixheaacd_aac_read_bit(ia_bit_buf_struct * it_bit_buff)184 WORD32 ixheaacd_aac_read_bit(ia_bit_buf_struct *it_bit_buff) {
185 UWORD8 ret_val;
186 UWORD8 *ptr_read_next = it_bit_buff->ptr_read_next;
187 WORD bit_pos = it_bit_buff->bit_pos;
188 UWORD32 temp;
189 WORD no_of_bits = 1;
190
191 if (bit_pos < 0) {
192 bit_pos = 7;
193 ptr_read_next--;
194 }
195
196 it_bit_buff->cnt_bits += no_of_bits;
197 ret_val = *ptr_read_next;
198 bit_pos -= no_of_bits;
199
200 temp = (ret_val << 24) << (bit_pos + no_of_bits);
201 it_bit_buff->ptr_read_next = ptr_read_next;
202 it_bit_buff->bit_pos = (WORD16)bit_pos;
203
204 return temp >> (32 - no_of_bits);
205 }
206
ixheaacd_aac_read_bit_rev(ia_bit_buf_struct * it_bit_buff)207 WORD32 ixheaacd_aac_read_bit_rev(ia_bit_buf_struct *it_bit_buff) {
208 UWORD8 ret_val;
209 UWORD8 *ptr_read_next = it_bit_buff->ptr_read_next;
210 WORD bit_pos = it_bit_buff->bit_pos;
211 UWORD32 temp;
212 WORD no_of_bits = 1;
213
214 if (bit_pos >= 8) {
215 bit_pos -= 8;
216 ptr_read_next++;
217 }
218
219 it_bit_buff->cnt_bits -= no_of_bits;
220 ret_val = *ptr_read_next;
221 bit_pos += no_of_bits;
222
223 temp = (ret_val << 24) << (bit_pos - no_of_bits);
224 it_bit_buff->ptr_read_next = ptr_read_next;
225 it_bit_buff->bit_pos = (WORD16)bit_pos;
226
227 return temp >> (32 - no_of_bits);
228 }
229
ixheaacd_write_bit(ia_bit_buf_struct * it_bit_buff,WORD32 value,WORD32 no_of_bits)230 VOID ixheaacd_write_bit(ia_bit_buf_struct *it_bit_buff, WORD32 value,
231 WORD32 no_of_bits)
232
233 {
234 WORD32 mask;
235
236 if (no_of_bits == 0) return;
237
238 mask = 0x1;
239 mask <<= no_of_bits - 1;
240
241 it_bit_buff->bit_count += no_of_bits;
242
243 while (no_of_bits > 0) {
244 while (no_of_bits > 0 && it_bit_buff->valid_bits < 8) {
245 it_bit_buff->byte <<= 1;
246 if (value & mask) it_bit_buff->byte |= 0x1;
247 value <<= 1;
248 no_of_bits--;
249 it_bit_buff->valid_bits++;
250 }
251 if (it_bit_buff->valid_bits == 8) {
252 *it_bit_buff->byte_ptr++ = it_bit_buff->byte;
253 it_bit_buff->byte = 0;
254 it_bit_buff->valid_bits = 0;
255 }
256 }
257 }
258
ixheaacd_read_bit(ia_bit_buf_struct * it_bit_buff,WORD32 no_of_bits)259 WORD32 ixheaacd_read_bit(ia_bit_buf_struct *it_bit_buff, WORD32 no_of_bits) {
260 UWORD32 ret_val;
261 UWORD8 *ptr_read_next = it_bit_buff->byte_ptr;
262
263 if (no_of_bits == 0) {
264 return 0;
265 }
266
267 ret_val = ixheaacd_aac_showbits_32(ptr_read_next);
268 it_bit_buff->byte_ptr += (no_of_bits >> 3);
269
270 if (it_bit_buff->valid_bits != 8) {
271 UWORD8 *v = it_bit_buff->byte_ptr;
272 ret_val = (ret_val << (8 - it_bit_buff->valid_bits)) |
273 (*v >> it_bit_buff->valid_bits);
274 }
275
276 it_bit_buff->valid_bits -= (no_of_bits % 8);
277
278 ret_val = ret_val >> (32 - no_of_bits);
279
280 return ret_val;
281 }
282