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 <string.h>
21 #include "ixheaacd_sbr_common.h"
22 #include <ixheaacd_type_def.h>
23 #include <assert.h>
24 #include "ixheaacd_constants.h"
25 #include <ixheaacd_basic_ops32.h>
26 #include <ixheaacd_basic_ops16.h>
27 #include <ixheaacd_basic_ops40.h>
28 #include "ixheaacd_basic_ops.h"
29
30 #include <ixheaacd_basic_op.h>
31 #include "ixheaacd_intrinsics.h"
32 #include "ixheaacd_bitbuffer.h"
33
34 #include "ixheaacd_adts_crc_check.h"
35 #include "ixheaacd_error_codes.h"
36
ixheaacd_byte_align(ia_bit_buf_struct * it_bit_buff,WORD32 * align_bits_cnt)37 VOID ixheaacd_byte_align(ia_bit_buf_struct *it_bit_buff,
38 WORD32 *align_bits_cnt) {
39 WORD alignment;
40 alignment = (WORD)((*align_bits_cnt - it_bit_buff->cnt_bits) & 0x07);
41
42 if (alignment) {
43 ixheaacd_read_bits_buf(it_bit_buff, (8 - alignment));
44 }
45
46 *align_bits_cnt = it_bit_buff->cnt_bits;
47 }
48
ixheaacd_skip_bits_buf(ia_bit_buf_struct * it_bit_buff,WORD no_of_bits)49 WORD32 ixheaacd_skip_bits_buf(ia_bit_buf_struct *it_bit_buff, WORD no_of_bits) {
50 UWORD8 *ptr_read_next = it_bit_buff->ptr_read_next;
51 WORD bit_pos = it_bit_buff->bit_pos;
52
53 if (it_bit_buff->cnt_bits < no_of_bits)
54 longjmp(*(it_bit_buff->xaac_jmp_buf),
55 IA_ENHAACPLUS_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES);
56 it_bit_buff->cnt_bits -= no_of_bits;
57
58 ptr_read_next += no_of_bits / 8;
59 bit_pos -= (no_of_bits % 8);
60 if (bit_pos < 0) {
61 bit_pos += 8;
62 ptr_read_next++;
63 }
64 assert(bit_pos >= 0 && bit_pos <= 7);
65
66 it_bit_buff->ptr_read_next = ptr_read_next;
67 it_bit_buff->bit_pos = (WORD16)bit_pos;
68 return no_of_bits;
69 }
70
ixheaacd_show_bits_buf(ia_bit_buf_struct * it_bit_buff,WORD no_of_bits)71 WORD32 ixheaacd_show_bits_buf(ia_bit_buf_struct *it_bit_buff, WORD no_of_bits) {
72 UWORD32 ret_val;
73 UWORD8 *ptr_read_next = it_bit_buff->ptr_read_next;
74 WORD bit_pos = it_bit_buff->bit_pos;
75
76 if (it_bit_buff->cnt_bits < no_of_bits) {
77 longjmp(*(it_bit_buff->xaac_jmp_buf),
78 IA_ENHAACPLUS_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES);
79 }
80
81 ret_val = (UWORD32)*ptr_read_next;
82
83 bit_pos -= no_of_bits;
84 while (bit_pos < 0) {
85 bit_pos += 8;
86 ptr_read_next++;
87
88 ret_val <<= 8;
89
90 ret_val |= (UWORD32)*ptr_read_next;
91 }
92
93 ret_val = ret_val << ((31 - no_of_bits) - bit_pos) >> (32 - no_of_bits);
94
95 return ret_val;
96 }
97
ixheaacd_read_bits_buf(ia_bit_buf_struct * it_bit_buff,WORD no_of_bits)98 WORD32 ixheaacd_read_bits_buf(ia_bit_buf_struct *it_bit_buff, WORD no_of_bits) {
99 UWORD32 ret_val;
100 UWORD8 *ptr_read_next = it_bit_buff->ptr_read_next;
101 WORD bit_pos = it_bit_buff->bit_pos;
102
103 if (no_of_bits == 0) {
104 return 0;
105 }
106
107 if (it_bit_buff->cnt_bits < no_of_bits) {
108 longjmp(*(it_bit_buff->xaac_jmp_buf),
109 IA_ENHAACPLUS_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES);
110 }
111
112 it_bit_buff->cnt_bits -= no_of_bits;
113 ret_val = (UWORD32)*ptr_read_next;
114
115 bit_pos -= no_of_bits;
116 if (0 == it_bit_buff->cnt_bits) {
117 while (bit_pos < -1) {
118 bit_pos += 8;
119 ptr_read_next++;
120 ret_val <<= 8;
121 ret_val |= (UWORD32)*ptr_read_next;
122 }
123 bit_pos += 8;
124 ret_val <<= 8;
125 ptr_read_next++;
126 } else {
127 while (bit_pos < 0) {
128 bit_pos += 8;
129 ptr_read_next++;
130
131 ret_val <<= 8;
132
133 ret_val |= (UWORD32)*ptr_read_next;
134 }
135 }
136
137 ret_val = ret_val << ((31 - no_of_bits) - bit_pos) >> (32 - no_of_bits);
138 it_bit_buff->ptr_read_next = ptr_read_next;
139 it_bit_buff->bit_pos = (WORD16)bit_pos;
140 return ret_val;
141 }
142
ixheaacd_aac_read_byte(UWORD8 ** ptr_read_next,WORD32 * bit_pos,WORD32 * readword)143 UWORD32 ixheaacd_aac_read_byte(UWORD8 **ptr_read_next, WORD32 *bit_pos,
144 WORD32 *readword) {
145 UWORD8 *v = *ptr_read_next;
146 WORD32 bits_consumed = *bit_pos;
147
148 if ((bits_consumed -= 8) >= 0) {
149 *readword = (*readword << 8) | *v;
150 v++;
151 } else {
152 bits_consumed += 8;
153 }
154 *bit_pos = bits_consumed;
155 *ptr_read_next = v;
156 return 1;
157 }
158
ixheaacd_aac_read_byte_corr1(UWORD8 ** ptr_read_next,WORD32 * ptr_bit_pos,WORD32 * readword,UWORD8 * p_bit_buf_end)159 UWORD32 ixheaacd_aac_read_byte_corr1(UWORD8 **ptr_read_next,
160 WORD32 *ptr_bit_pos, WORD32 *readword,
161 UWORD8 *p_bit_buf_end) {
162 UWORD8 *v = *ptr_read_next;
163 WORD32 bits_consumed = *ptr_bit_pos;
164 WORD32 temp_bit_count = 0;
165
166 while (bits_consumed >= 8) {
167 bits_consumed -= 8;
168 if ((p_bit_buf_end < v) && (p_bit_buf_end != 0))
169 temp_bit_count += 8;
170 else {
171 *readword = (*readword << 8) | *v;
172 v++;
173 }
174 }
175 *ptr_bit_pos = bits_consumed + temp_bit_count;
176 *ptr_read_next = v;
177 return 1;
178 }
179
ixheaacd_aac_read_byte_corr(UWORD8 ** ptr_read_next,WORD32 * ptr_bit_pos,WORD32 * readword,UWORD8 * p_bit_buf_end)180 UWORD32 ixheaacd_aac_read_byte_corr(UWORD8 **ptr_read_next, WORD32 *ptr_bit_pos,
181 WORD32 *readword, UWORD8 *p_bit_buf_end) {
182 UWORD8 *v = *ptr_read_next;
183 WORD32 bits_consumed = *ptr_bit_pos;
184
185 if ((bits_consumed -= 8) >= 0) {
186 if (p_bit_buf_end < v)
187 bits_consumed += 8;
188 else {
189 *readword = (*readword << 8) | *v;
190 v++;
191 }
192 } else {
193 bits_consumed += 8;
194 }
195 *ptr_bit_pos = bits_consumed;
196 *ptr_read_next = v;
197 return 1;
198 }
199
ixheaacd_aac_read_bit(ia_bit_buf_struct * it_bit_buff)200 WORD32 ixheaacd_aac_read_bit(ia_bit_buf_struct *it_bit_buff) {
201 UWORD8 ret_val;
202 UWORD8 *ptr_read_next = it_bit_buff->ptr_read_next;
203 WORD bit_pos = it_bit_buff->bit_pos;
204 UWORD32 temp;
205 WORD no_of_bits = 1;
206
207 if (bit_pos < 0) {
208 bit_pos = 7;
209 ptr_read_next--;
210 }
211
212 if (ptr_read_next < it_bit_buff->ptr_bit_buf_base) {
213 longjmp(*(it_bit_buff->xaac_jmp_buf),
214 IA_ENHAACPLUS_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES);
215 }
216
217 it_bit_buff->cnt_bits += no_of_bits;
218 ret_val = *ptr_read_next;
219 bit_pos -= no_of_bits;
220
221 temp = (ret_val << 24) << (bit_pos + no_of_bits);
222 it_bit_buff->ptr_read_next = ptr_read_next;
223 it_bit_buff->bit_pos = (WORD16)bit_pos;
224
225 return temp >> (32 - no_of_bits);
226 }
227
ixheaacd_aac_read_bit_rev(ia_bit_buf_struct * it_bit_buff)228 WORD32 ixheaacd_aac_read_bit_rev(ia_bit_buf_struct *it_bit_buff) {
229 UWORD8 ret_val;
230 UWORD8 *ptr_read_next = it_bit_buff->ptr_read_next;
231 WORD bit_pos = it_bit_buff->bit_pos;
232 UWORD32 temp;
233 WORD no_of_bits = 1;
234
235 if (it_bit_buff->cnt_bits < no_of_bits) {
236 longjmp(*(it_bit_buff->xaac_jmp_buf),
237 IA_ENHAACPLUS_DEC_EXE_NONFATAL_INSUFFICIENT_INPUT_BYTES);
238 }
239
240 if (bit_pos >= 8) {
241 bit_pos -= 8;
242 ptr_read_next++;
243 }
244
245 it_bit_buff->cnt_bits -= no_of_bits;
246 ret_val = *ptr_read_next;
247 bit_pos += no_of_bits;
248
249 temp = (ret_val << 24) << (bit_pos - no_of_bits);
250 it_bit_buff->ptr_read_next = ptr_read_next;
251 it_bit_buff->bit_pos = (WORD16)bit_pos;
252
253 return temp >> (32 - no_of_bits);
254 }
255
ixheaacd_write_bit(ia_bit_buf_struct * it_bit_buff,WORD32 value,WORD32 no_of_bits)256 VOID ixheaacd_write_bit(ia_bit_buf_struct *it_bit_buff, WORD32 value,
257 WORD32 no_of_bits)
258
259 {
260 WORD32 mask;
261
262 if (no_of_bits == 0) return;
263
264 mask = 0x1;
265 mask <<= no_of_bits - 1;
266
267 it_bit_buff->bit_count += no_of_bits;
268
269 while (no_of_bits > 0) {
270 while (no_of_bits > 0 && it_bit_buff->valid_bits < 8) {
271 it_bit_buff->byte <<= 1;
272 if (value & mask) it_bit_buff->byte |= 0x1;
273 value <<= 1;
274 no_of_bits--;
275 it_bit_buff->valid_bits++;
276 }
277 if (it_bit_buff->valid_bits == 8) {
278 *it_bit_buff->byte_ptr++ = it_bit_buff->byte;
279 it_bit_buff->byte = 0;
280 it_bit_buff->valid_bits = 0;
281 }
282 }
283 }
284
ixheaacd_read_bit(ia_bit_buf_struct * it_bit_buff,WORD32 no_of_bits)285 WORD32 ixheaacd_read_bit(ia_bit_buf_struct *it_bit_buff, WORD32 no_of_bits) {
286 UWORD32 ret_val;
287 UWORD8 *ptr_read_next = it_bit_buff->byte_ptr;
288
289 if (no_of_bits == 0) {
290 return 0;
291 }
292
293 ret_val =
294 ixheaacd_aac_showbits_32(ptr_read_next, it_bit_buff->bit_count, NULL);
295 it_bit_buff->byte_ptr += (no_of_bits >> 3);
296
297 if (it_bit_buff->valid_bits != 8) {
298 UWORD8 *v = it_bit_buff->byte_ptr;
299 ret_val = (ret_val << (8 - it_bit_buff->valid_bits)) |
300 (*v >> it_bit_buff->valid_bits);
301 }
302
303 it_bit_buff->valid_bits -= (no_of_bits % 8);
304
305 ret_val = ret_val >> (32 - no_of_bits);
306
307 return ret_val;
308 }
309