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
21 #include <string.h>
22 #include <assert.h>
23 #include "ixheaacd_sbr_common.h"
24 #include "ixheaacd_type_def.h"
25 #include "ixheaacd_constants.h"
26 #include "ixheaacd_basic_ops32.h"
27 #include "ixheaacd_basic_ops16.h"
28 #include "ixheaacd_basic_ops40.h"
29 #include "ixheaacd_basic_ops.h"
30
31 #include "ixheaacd_basic_op.h"
32 #include "ixheaacd_intrinsics.h"
33 #include "ixheaacd_bitbuffer.h"
34
35 #include "ixheaacd_adts_crc_check.h"
36 #include "ixheaacd_error_codes.h"
37
ixheaacd_byte_align(ia_bit_buf_struct * it_bit_buff,WORD32 * align_bits_cnt)38 VOID ixheaacd_byte_align(ia_bit_buf_struct *it_bit_buff,
39 WORD32 *align_bits_cnt) {
40 WORD alignment;
41 alignment = (WORD)((*align_bits_cnt - it_bit_buff->cnt_bits) & 0x07);
42
43 if (alignment) {
44 ixheaacd_read_bits_buf(it_bit_buff, (8 - alignment));
45 }
46
47 *align_bits_cnt = it_bit_buff->cnt_bits;
48 }
49
ixheaacd_skip_bits_buf(ia_bit_buf_struct * it_bit_buff,WORD no_of_bits)50 WORD32 ixheaacd_skip_bits_buf(ia_bit_buf_struct *it_bit_buff, WORD no_of_bits) {
51 UWORD8 *ptr_read_next = it_bit_buff->ptr_read_next;
52 WORD bit_pos = it_bit_buff->bit_pos;
53
54 if (it_bit_buff->cnt_bits < no_of_bits || it_bit_buff->cnt_bits < 0)
55 longjmp(*(it_bit_buff->xaac_jmp_buf),
56 IA_ENHAACPLUS_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES);
57 it_bit_buff->cnt_bits -= no_of_bits;
58
59 ptr_read_next += no_of_bits / 8;
60 bit_pos -= (no_of_bits % 8);
61 if (bit_pos < 0) {
62 bit_pos += 8;
63 ptr_read_next++;
64 }
65 assert(bit_pos >= 0 && bit_pos <= 7);
66
67 it_bit_buff->ptr_read_next = ptr_read_next;
68 it_bit_buff->bit_pos = (WORD16)bit_pos;
69 return no_of_bits;
70 }
71
ixheaacd_show_bits_buf(ia_bit_buf_struct * it_bit_buff,WORD no_of_bits)72 WORD32 ixheaacd_show_bits_buf(ia_bit_buf_struct *it_bit_buff, WORD no_of_bits) {
73 UWORD32 ret_val;
74 UWORD8 *ptr_read_next = it_bit_buff->ptr_read_next;
75 WORD bit_pos = it_bit_buff->bit_pos;
76
77 if (no_of_bits == 0) {
78 return 0;
79 }
80
81 if (it_bit_buff->cnt_bits < no_of_bits || it_bit_buff->cnt_bits < 0 ||
82 no_of_bits > 25) {
83 longjmp(*(it_bit_buff->xaac_jmp_buf),
84 IA_ENHAACPLUS_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES);
85 }
86
87 ret_val = (UWORD32)*ptr_read_next;
88
89 bit_pos -= no_of_bits;
90 while (bit_pos < -1) {
91 bit_pos += 8;
92 ptr_read_next++;
93
94 ret_val <<= 8;
95
96 ret_val |= (UWORD32)*ptr_read_next;
97 }
98
99 if (bit_pos == -1) {
100 bit_pos += 8;
101 ret_val <<= 8;
102 ptr_read_next++;
103 }
104
105 ret_val = ret_val << ((31 - no_of_bits) - bit_pos) >> (32 - no_of_bits);
106
107 return ret_val;
108 }
109
ixheaacd_read_bits_buf(ia_bit_buf_struct * it_bit_buff,WORD no_of_bits)110 WORD32 ixheaacd_read_bits_buf(ia_bit_buf_struct *it_bit_buff, WORD no_of_bits) {
111 UWORD32 ret_val;
112 UWORD8 *ptr_read_next = it_bit_buff->ptr_read_next;
113 WORD bit_pos = it_bit_buff->bit_pos;
114
115 if (no_of_bits == 0) {
116 return 0;
117 }
118
119 if (it_bit_buff->cnt_bits < no_of_bits || it_bit_buff->cnt_bits < 0 ||
120 no_of_bits > 25) {
121 longjmp(*(it_bit_buff->xaac_jmp_buf),
122 IA_ENHAACPLUS_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES);
123 }
124
125 it_bit_buff->cnt_bits -= no_of_bits;
126 ret_val = (UWORD32)*ptr_read_next;
127
128 bit_pos -= no_of_bits;
129 while (bit_pos < -1) {
130 bit_pos += 8;
131 ptr_read_next++;
132
133 ret_val <<= 8;
134
135 ret_val |= (UWORD32)*ptr_read_next;
136 }
137
138 if (bit_pos == -1) {
139 bit_pos += 8;
140 ret_val <<= 8;
141 ptr_read_next++;
142 }
143
144 ret_val = ret_val << ((31 - no_of_bits) - bit_pos) >> (32 - no_of_bits);
145 it_bit_buff->ptr_read_next = ptr_read_next;
146 it_bit_buff->bit_pos = (WORD16)bit_pos;
147 return ret_val;
148 }
149
ixheaacd_aac_read_byte(UWORD8 ** ptr_read_next,WORD32 * bit_pos,WORD32 * readword)150 UWORD32 ixheaacd_aac_read_byte(UWORD8 **ptr_read_next, WORD32 *bit_pos,
151 WORD32 *readword) {
152 UWORD8 *v = *ptr_read_next;
153 WORD32 bits_consumed = *bit_pos;
154
155 if ((bits_consumed -= 8) >= 0) {
156 *readword = (*readword << 8) | *v;
157 v++;
158 } else {
159 bits_consumed += 8;
160 }
161 *bit_pos = bits_consumed;
162 *ptr_read_next = v;
163 return 1;
164 }
165
ixheaacd_aac_read_byte_corr1(UWORD8 ** ptr_read_next,WORD32 * ptr_bit_pos,WORD32 * readword,UWORD8 * p_bit_buf_end)166 UWORD32 ixheaacd_aac_read_byte_corr1(UWORD8 **ptr_read_next,
167 WORD32 *ptr_bit_pos, WORD32 *readword,
168 UWORD8 *p_bit_buf_end) {
169 UWORD8 *v = *ptr_read_next;
170 WORD32 bits_consumed = *ptr_bit_pos;
171 WORD32 temp_bit_count = 0;
172
173 while (bits_consumed >= 8) {
174 bits_consumed -= 8;
175 if ((p_bit_buf_end < v) && (p_bit_buf_end != 0))
176 temp_bit_count += 8;
177 else {
178 *readword = (*readword << 8) | *v;
179 v++;
180 }
181 }
182 *ptr_bit_pos = bits_consumed + temp_bit_count;
183 *ptr_read_next = v;
184 return 1;
185 }
186
ixheaacd_aac_read_byte_corr(UWORD8 ** ptr_read_next,WORD32 * ptr_bit_pos,WORD32 * readword,UWORD8 * p_bit_buf_end)187 UWORD32 ixheaacd_aac_read_byte_corr(UWORD8 **ptr_read_next, WORD32 *ptr_bit_pos,
188 WORD32 *readword, UWORD8 *p_bit_buf_end) {
189 UWORD8 *v = *ptr_read_next;
190 WORD32 bits_consumed = *ptr_bit_pos;
191
192 if ((bits_consumed -= 8) >= 0) {
193 if (p_bit_buf_end < v)
194 bits_consumed += 8;
195 else {
196 *readword = (*readword << 8) | *v;
197 v++;
198 }
199 } else {
200 bits_consumed += 8;
201 }
202 *ptr_bit_pos = bits_consumed;
203 *ptr_read_next = v;
204 return 1;
205 }
206
ixheaacd_aac_read_bit(ia_bit_buf_struct * it_bit_buff)207 WORD32 ixheaacd_aac_read_bit(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 < 0) {
215 bit_pos = 7;
216 ptr_read_next--;
217 }
218
219 if (ptr_read_next < it_bit_buff->ptr_bit_buf_base) {
220 longjmp(*(it_bit_buff->xaac_jmp_buf),
221 IA_ENHAACPLUS_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES);
222 }
223
224 it_bit_buff->cnt_bits += no_of_bits;
225 ret_val = *ptr_read_next;
226 bit_pos -= no_of_bits;
227
228 temp = (ret_val << 24) << (bit_pos + no_of_bits);
229 it_bit_buff->ptr_read_next = ptr_read_next;
230 it_bit_buff->bit_pos = (WORD16)bit_pos;
231
232 return temp >> (32 - no_of_bits);
233 }
234
ixheaacd_aac_read_bit_rev(ia_bit_buf_struct * it_bit_buff)235 WORD32 ixheaacd_aac_read_bit_rev(ia_bit_buf_struct *it_bit_buff) {
236 UWORD8 ret_val;
237 UWORD8 *ptr_read_next = it_bit_buff->ptr_read_next;
238 WORD bit_pos = it_bit_buff->bit_pos;
239 UWORD32 temp;
240 WORD no_of_bits = 1;
241
242 if (it_bit_buff->cnt_bits < no_of_bits || it_bit_buff->cnt_bits < 0) {
243 longjmp(*(it_bit_buff->xaac_jmp_buf),
244 IA_ENHAACPLUS_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES);
245 }
246
247 if (bit_pos >= 8) {
248 bit_pos -= 8;
249 ptr_read_next++;
250 }
251
252 it_bit_buff->cnt_bits -= no_of_bits;
253 ret_val = *ptr_read_next;
254 bit_pos += no_of_bits;
255
256 temp = (ret_val << 24) << (bit_pos - no_of_bits);
257 it_bit_buff->ptr_read_next = ptr_read_next;
258 it_bit_buff->bit_pos = (WORD16)bit_pos;
259
260 return temp >> (32 - no_of_bits);
261 }
262
ixheaacd_write_bit(ia_bit_buf_struct * it_bit_buff,WORD32 value,WORD32 no_of_bits)263 VOID ixheaacd_write_bit(ia_bit_buf_struct *it_bit_buff, WORD32 value,
264 WORD32 no_of_bits)
265
266 {
267 WORD32 mask;
268
269 if (no_of_bits == 0) return;
270
271 mask = 0x1;
272 mask <<= no_of_bits - 1;
273
274 it_bit_buff->bit_count += no_of_bits;
275
276 while (no_of_bits > 0) {
277 while (no_of_bits > 0 && it_bit_buff->valid_bits < 8) {
278 it_bit_buff->byte <<= 1;
279 if (value & mask) it_bit_buff->byte |= 0x1;
280 value <<= 1;
281 no_of_bits--;
282 it_bit_buff->valid_bits++;
283 }
284 if (it_bit_buff->valid_bits == 8) {
285 *it_bit_buff->byte_ptr++ = it_bit_buff->byte;
286 it_bit_buff->byte = 0;
287 it_bit_buff->valid_bits = 0;
288 }
289 }
290 }
291
ixheaacd_read_bit(ia_bit_buf_struct * it_bit_buff,WORD32 no_of_bits)292 WORD32 ixheaacd_read_bit(ia_bit_buf_struct *it_bit_buff, WORD32 no_of_bits) {
293 UWORD32 ret_val;
294 UWORD8 *ptr_read_next = it_bit_buff->byte_ptr;
295
296 if (no_of_bits == 0) {
297 return 0;
298 }
299
300 ret_val =
301 ixheaacd_aac_showbits_32(ptr_read_next, it_bit_buff->bit_count, NULL);
302 it_bit_buff->byte_ptr += (no_of_bits >> 3);
303
304 if (it_bit_buff->valid_bits != 8) {
305 UWORD8 *v = it_bit_buff->byte_ptr;
306 ret_val = (ret_val << (8 - it_bit_buff->valid_bits)) |
307 (*v >> it_bit_buff->valid_bits);
308 }
309
310 it_bit_buff->valid_bits -= (no_of_bits % 8);
311
312 ret_val = ret_val >> (32 - no_of_bits);
313
314 return ret_val;
315 }
316