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Diffstat (limited to 'lib/rbcodec/codecs/libfaad/bits.c')
-rw-r--r-- | lib/rbcodec/codecs/libfaad/bits.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libfaad/bits.c b/lib/rbcodec/codecs/libfaad/bits.c new file mode 100644 index 0000000000..a3640077d8 --- /dev/null +++ b/lib/rbcodec/codecs/libfaad/bits.c | |||
@@ -0,0 +1,208 @@ | |||
1 | /* | ||
2 | ** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding | ||
3 | ** Copyright (C) 2003-2004 M. Bakker, Ahead Software AG, http://www.nero.com | ||
4 | ** | ||
5 | ** This program is free software; you can redistribute it and/or modify | ||
6 | ** it under the terms of the GNU General Public License as published by | ||
7 | ** the Free Software Foundation; either version 2 of the License, or | ||
8 | ** (at your option) any later version. | ||
9 | ** | ||
10 | ** This program is distributed in the hope that it will be useful, | ||
11 | ** but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
13 | ** GNU General Public License for more details. | ||
14 | ** | ||
15 | ** You should have received a copy of the GNU General Public License | ||
16 | ** along with this program; if not, write to the Free Software | ||
17 | ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | ||
18 | ** | ||
19 | ** Any non-GPL usage of this software or parts of this software is strictly | ||
20 | ** forbidden. | ||
21 | ** | ||
22 | ** Commercial non-GPL licensing of this software is possible. | ||
23 | ** For more info contact Ahead Software through Mpeg4AAClicense@nero.com. | ||
24 | ** | ||
25 | ** $Id$ | ||
26 | **/ | ||
27 | |||
28 | #include "common.h" | ||
29 | #include "structs.h" | ||
30 | |||
31 | #include <stdlib.h> | ||
32 | #include <string.h> | ||
33 | #include "bits.h" | ||
34 | |||
35 | /* Need to be large enough to fit the largest compressed sample in a file. | ||
36 | * Samples were observed to need up to 1500 bytes (400 kbps nero aac). | ||
37 | */ | ||
38 | #define BUFFER_SIZE 2048 | ||
39 | static uint8_t static_buffer[BUFFER_SIZE] IBSS_ATTR; | ||
40 | |||
41 | /* initialize buffer, call once before first getbits or showbits */ | ||
42 | void faad_initbits(bitfile *ld, const void *_buffer, const uint32_t buffer_size) | ||
43 | { | ||
44 | uint32_t tmp; | ||
45 | |||
46 | if (ld == NULL) | ||
47 | return; | ||
48 | |||
49 | memset(ld, 0, sizeof(bitfile)); | ||
50 | |||
51 | if (buffer_size == 0 || _buffer == NULL || (buffer_size+12)>BUFFER_SIZE) | ||
52 | { | ||
53 | ld->error = 1; | ||
54 | ld->no_more_reading = 1; | ||
55 | return; | ||
56 | } | ||
57 | |||
58 | ld->buffer = &static_buffer; | ||
59 | memset(ld->buffer, 0, (buffer_size+12)*sizeof(uint8_t)); | ||
60 | memcpy(ld->buffer, _buffer, buffer_size*sizeof(uint8_t)); | ||
61 | |||
62 | ld->buffer_size = buffer_size; | ||
63 | |||
64 | tmp = getdword((uint32_t*)ld->buffer); | ||
65 | ld->bufa = tmp; | ||
66 | |||
67 | tmp = getdword((uint32_t*)ld->buffer + 1); | ||
68 | ld->bufb = tmp; | ||
69 | |||
70 | ld->start = (uint32_t*)ld->buffer; | ||
71 | ld->tail = ((uint32_t*)ld->buffer + 2); | ||
72 | |||
73 | ld->bits_left = 32; | ||
74 | |||
75 | ld->bytes_used = 0; | ||
76 | ld->no_more_reading = 0; | ||
77 | ld->error = 0; | ||
78 | } | ||
79 | |||
80 | void faad_endbits(bitfile *ld) | ||
81 | { | ||
82 | #if 0 | ||
83 | if (ld) | ||
84 | { | ||
85 | if (ld->buffer) | ||
86 | { | ||
87 | faad_free(ld->buffer); | ||
88 | ld->buffer = NULL; | ||
89 | } | ||
90 | } | ||
91 | #else | ||
92 | (void) ld; | ||
93 | #endif | ||
94 | } | ||
95 | |||
96 | uint32_t faad_get_processed_bits(bitfile *ld) | ||
97 | { | ||
98 | return (uint32_t)(8 * (4*(ld->tail - ld->start) - 4) - (ld->bits_left)); | ||
99 | } | ||
100 | |||
101 | uint8_t faad_byte_align(bitfile *ld) | ||
102 | { | ||
103 | uint8_t remainder = (uint8_t)((32 - ld->bits_left) % 8); | ||
104 | |||
105 | if (remainder) | ||
106 | { | ||
107 | faad_flushbits(ld, 8 - remainder); | ||
108 | return (8 - remainder); | ||
109 | } | ||
110 | return 0; | ||
111 | } | ||
112 | |||
113 | /* rewind to beginning */ | ||
114 | /* not used | ||
115 | void faad_rewindbits(bitfile *ld) | ||
116 | { | ||
117 | uint32_t tmp; | ||
118 | |||
119 | tmp = ld->start[0]; | ||
120 | #ifndef ARCH_IS_BIG_ENDIAN | ||
121 | tmp = BSWAP(tmp); | ||
122 | #endif | ||
123 | ld->bufa = tmp; | ||
124 | |||
125 | tmp = ld->start[1]; | ||
126 | #ifndef ARCH_IS_BIG_ENDIAN | ||
127 | tmp = BSWAP(tmp); | ||
128 | #endif | ||
129 | ld->bufb = tmp; | ||
130 | ld->bits_left = 32; | ||
131 | ld->tail = &ld->start[2]; | ||
132 | ld->bytes_used = 0; | ||
133 | ld->no_more_reading = 0; | ||
134 | } | ||
135 | */ | ||
136 | |||
137 | #ifdef ERROR_RESILIENCE | ||
138 | uint8_t *faad_getbitbuffer(bitfile *ld, uint32_t bits | ||
139 | DEBUGDEC) | ||
140 | { | ||
141 | uint16_t i; | ||
142 | uint8_t temp; | ||
143 | uint16_t bytes = (uint16_t)bits / 8; | ||
144 | uint8_t remainder = (uint8_t)bits % 8; | ||
145 | |||
146 | uint8_t *buffer = (uint8_t*)faad_malloc((bytes+1)*sizeof(uint8_t)); | ||
147 | |||
148 | for (i = 0; i < bytes; i++) | ||
149 | { | ||
150 | buffer[i] = (uint8_t)faad_getbits(ld, 8 DEBUGVAR(print,var,dbg)); | ||
151 | } | ||
152 | |||
153 | if (remainder) | ||
154 | { | ||
155 | temp = (uint8_t)faad_getbits(ld, remainder DEBUGVAR(print,var,dbg)) << (8-remainder); | ||
156 | |||
157 | buffer[bytes] = temp; | ||
158 | } | ||
159 | |||
160 | return buffer; | ||
161 | } | ||
162 | #endif | ||
163 | |||
164 | #ifdef DRM | ||
165 | /* return the original data buffer */ | ||
166 | void *faad_origbitbuffer(bitfile *ld) | ||
167 | { | ||
168 | return (void*)ld->start; | ||
169 | } | ||
170 | |||
171 | /* return the original data buffer size */ | ||
172 | uint32_t faad_origbitbuffer_size(bitfile *ld) | ||
173 | { | ||
174 | return ld->buffer_size; | ||
175 | } | ||
176 | #endif | ||
177 | |||
178 | /* reversed bit reading routines, used for RVLC and HCR */ | ||
179 | /* not used | ||
180 | void faad_initbits_rev(bitfile *ld, void *buffer, | ||
181 | uint32_t bits_in_buffer) | ||
182 | { | ||
183 | uint32_t tmp; | ||
184 | int32_t index; | ||
185 | |||
186 | ld->buffer_size = bit2byte(bits_in_buffer); | ||
187 | |||
188 | index = (bits_in_buffer+31)/32 - 1; | ||
189 | |||
190 | ld->start = (uint32_t*)buffer + index - 2; | ||
191 | |||
192 | tmp = getdword((uint32_t*)buffer + index); | ||
193 | ld->bufa = tmp; | ||
194 | |||
195 | tmp = getdword((uint32_t*)buffer + index - 1); | ||
196 | ld->bufb = tmp; | ||
197 | |||
198 | ld->tail = (uint32_t*)buffer + index; | ||
199 | |||
200 | ld->bits_left = bits_in_buffer % 32; | ||
201 | if (ld->bits_left == 0) | ||
202 | ld->bits_left = 32; | ||
203 | |||
204 | ld->bytes_used = 0; | ||
205 | ld->no_more_reading = 0; | ||
206 | ld->error = 0; | ||
207 | } | ||
208 | */ | ||