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author | Sean Bartell <wingedtachikoma@gmail.com> | 2011-06-25 21:32:25 -0400 |
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committer | Nils Wallménius <nils@rockbox.org> | 2012-04-25 22:13:20 +0200 |
commit | f40bfc9267b13b54e6379dfe7539447662879d24 (patch) | |
tree | 9b20069d5e62809ff434061ad730096836f916f2 /apps/codecs/lib/ffmpeg_put_bits.h | |
parent | a0009907de7a0107d49040d8a180f140e2eff299 (diff) | |
download | rockbox-f40bfc9267b13b54e6379dfe7539447662879d24.tar.gz rockbox-f40bfc9267b13b54e6379dfe7539447662879d24.zip |
Add codecs to librbcodec.
Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97
Reviewed-on: http://gerrit.rockbox.org/137
Reviewed-by: Nils Wallménius <nils@rockbox.org>
Tested-by: Nils Wallménius <nils@rockbox.org>
Diffstat (limited to 'apps/codecs/lib/ffmpeg_put_bits.h')
-rw-r--r-- | apps/codecs/lib/ffmpeg_put_bits.h | 323 |
1 files changed, 0 insertions, 323 deletions
diff --git a/apps/codecs/lib/ffmpeg_put_bits.h b/apps/codecs/lib/ffmpeg_put_bits.h deleted file mode 100644 index 38db55fe18..0000000000 --- a/apps/codecs/lib/ffmpeg_put_bits.h +++ /dev/null | |||
@@ -1,323 +0,0 @@ | |||
1 | /* | ||
2 | * copyright (c) 2004 Michael Niedermayer <michaelni@gmx.at> | ||
3 | * | ||
4 | * This file is part of FFmpeg. | ||
5 | * | ||
6 | * FFmpeg is free software; you can redistribute it and/or | ||
7 | * modify it under the terms of the GNU Lesser General Public | ||
8 | * License as published by the Free Software Foundation; either | ||
9 | * version 2.1 of the License, or (at your option) any later version. | ||
10 | * | ||
11 | * FFmpeg is distributed in the hope that it will be useful, | ||
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
14 | * Lesser General Public License for more details. | ||
15 | * | ||
16 | * You should have received a copy of the GNU Lesser General Public | ||
17 | * License along with FFmpeg; if not, write to the Free Software | ||
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
19 | */ | ||
20 | |||
21 | /** | ||
22 | * @file libavcodec/put_bits.h | ||
23 | * bitstream writer API | ||
24 | */ | ||
25 | |||
26 | #ifndef AVCODEC_PUT_BITS_H | ||
27 | #define AVCODEC_PUT_BITS_H | ||
28 | |||
29 | #include <stdint.h> | ||
30 | #include <stdlib.h> | ||
31 | #include "ffmpeg_bswap.h" | ||
32 | #include "ffmpeg_intreadwrite.h" | ||
33 | |||
34 | #define av_log(...) | ||
35 | #define HAVE_FAST_UNALIGNED 0 | ||
36 | |||
37 | /* buf and buf_end must be present and used by every alternative writer. */ | ||
38 | typedef struct PutBitContext { | ||
39 | #ifdef ALT_BITSTREAM_WRITER | ||
40 | uint8_t *buf, *buf_end; | ||
41 | int index; | ||
42 | #else | ||
43 | uint32_t bit_buf; | ||
44 | int bit_left; | ||
45 | uint8_t *buf, *buf_ptr, *buf_end; | ||
46 | #endif | ||
47 | int size_in_bits; | ||
48 | } PutBitContext; | ||
49 | |||
50 | /** | ||
51 | * Initializes the PutBitContext s. | ||
52 | * | ||
53 | * @param buffer the buffer where to put bits | ||
54 | * @param buffer_size the size in bytes of buffer | ||
55 | */ | ||
56 | static inline void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size) | ||
57 | { | ||
58 | if(buffer_size < 0) { | ||
59 | buffer_size = 0; | ||
60 | buffer = NULL; | ||
61 | } | ||
62 | |||
63 | s->size_in_bits= 8*buffer_size; | ||
64 | s->buf = buffer; | ||
65 | s->buf_end = s->buf + buffer_size; | ||
66 | #ifdef ALT_BITSTREAM_WRITER | ||
67 | s->index=0; | ||
68 | ((uint32_t*)(s->buf))[0]=0; | ||
69 | // memset(buffer, 0, buffer_size); | ||
70 | #else | ||
71 | s->buf_ptr = s->buf; | ||
72 | s->bit_left=32; | ||
73 | s->bit_buf=0; | ||
74 | #endif | ||
75 | } | ||
76 | |||
77 | /** | ||
78 | * Returns the total number of bits written to the bitstream. | ||
79 | */ | ||
80 | static inline int put_bits_count(PutBitContext *s) | ||
81 | { | ||
82 | #ifdef ALT_BITSTREAM_WRITER | ||
83 | return s->index; | ||
84 | #else | ||
85 | return (s->buf_ptr - s->buf) * 8 + 32 - s->bit_left; | ||
86 | #endif | ||
87 | } | ||
88 | |||
89 | /** | ||
90 | * Pads the end of the output stream with zeros. | ||
91 | */ | ||
92 | static inline void flush_put_bits(PutBitContext *s) | ||
93 | { | ||
94 | #ifdef ALT_BITSTREAM_WRITER | ||
95 | align_put_bits(s); | ||
96 | #else | ||
97 | #ifndef BITSTREAM_WRITER_LE | ||
98 | s->bit_buf<<= s->bit_left; | ||
99 | #endif | ||
100 | while (s->bit_left < 32) { | ||
101 | /* XXX: should test end of buffer */ | ||
102 | #ifdef BITSTREAM_WRITER_LE | ||
103 | *s->buf_ptr++=s->bit_buf; | ||
104 | s->bit_buf>>=8; | ||
105 | #else | ||
106 | *s->buf_ptr++=s->bit_buf >> 24; | ||
107 | s->bit_buf<<=8; | ||
108 | #endif | ||
109 | s->bit_left+=8; | ||
110 | } | ||
111 | s->bit_left=32; | ||
112 | s->bit_buf=0; | ||
113 | #endif | ||
114 | } | ||
115 | |||
116 | #if defined(ALT_BITSTREAM_WRITER) || defined(BITSTREAM_WRITER_LE) | ||
117 | #define align_put_bits align_put_bits_unsupported_here | ||
118 | #define ff_put_string ff_put_string_unsupported_here | ||
119 | #define ff_copy_bits ff_copy_bits_unsupported_here | ||
120 | #else | ||
121 | /** | ||
122 | * Pads the bitstream with zeros up to the next byte boundary. | ||
123 | */ | ||
124 | void align_put_bits(PutBitContext *s); | ||
125 | |||
126 | /** | ||
127 | * Puts the string string in the bitstream. | ||
128 | * | ||
129 | * @param terminate_string 0-terminates the written string if value is 1 | ||
130 | */ | ||
131 | void ff_put_string(PutBitContext *pb, const char *string, int terminate_string); | ||
132 | |||
133 | /** | ||
134 | * Copies the content of src to the bitstream. | ||
135 | * | ||
136 | * @param length the number of bits of src to copy | ||
137 | */ | ||
138 | void ff_copy_bits(PutBitContext *pb, const uint8_t *src, int length); | ||
139 | #endif | ||
140 | |||
141 | /** | ||
142 | * Writes up to 31 bits into a bitstream. | ||
143 | * Use put_bits32 to write 32 bits. | ||
144 | */ | ||
145 | static inline void put_bits(PutBitContext *s, int n, unsigned int value) | ||
146 | #ifndef ALT_BITSTREAM_WRITER | ||
147 | { | ||
148 | unsigned int bit_buf; | ||
149 | int bit_left; | ||
150 | |||
151 | // printf("put_bits=%d %x\n", n, value); | ||
152 | //assert(n <= 31 && value < (1U << n)); | ||
153 | |||
154 | bit_buf = s->bit_buf; | ||
155 | bit_left = s->bit_left; | ||
156 | |||
157 | // printf("n=%d value=%x cnt=%d buf=%x\n", n, value, bit_cnt, bit_buf); | ||
158 | /* XXX: optimize */ | ||
159 | #ifdef BITSTREAM_WRITER_LE | ||
160 | bit_buf |= value << (32 - bit_left); | ||
161 | if (n >= bit_left) { | ||
162 | #if !HAVE_FAST_UNALIGNED | ||
163 | if (3 & (intptr_t) s->buf_ptr) { | ||
164 | AV_WL32(s->buf_ptr, bit_buf); | ||
165 | } else | ||
166 | #endif | ||
167 | *(uint32_t *)s->buf_ptr = le2me_32(bit_buf); | ||
168 | s->buf_ptr+=4; | ||
169 | bit_buf = (bit_left==32)?0:value >> bit_left; | ||
170 | bit_left+=32; | ||
171 | } | ||
172 | bit_left-=n; | ||
173 | #else | ||
174 | if (n < bit_left) { | ||
175 | bit_buf = (bit_buf<<n) | value; | ||
176 | bit_left-=n; | ||
177 | } else { | ||
178 | bit_buf<<=bit_left; | ||
179 | bit_buf |= value >> (n - bit_left); | ||
180 | #if !HAVE_FAST_UNALIGNED | ||
181 | if (3 & (intptr_t) s->buf_ptr) { | ||
182 | AV_WB32(s->buf_ptr, bit_buf); | ||
183 | } else | ||
184 | #endif | ||
185 | *(uint32_t *)s->buf_ptr = be2me_32(bit_buf); | ||
186 | //printf("bitbuf = %08x\n", bit_buf); | ||
187 | s->buf_ptr+=4; | ||
188 | bit_left+=32 - n; | ||
189 | bit_buf = value; | ||
190 | } | ||
191 | #endif | ||
192 | |||
193 | s->bit_buf = bit_buf; | ||
194 | s->bit_left = bit_left; | ||
195 | } | ||
196 | #else /* ALT_BITSTREAM_WRITER defined */ | ||
197 | { | ||
198 | # ifdef ALIGNED_BITSTREAM_WRITER | ||
199 | # if ARCH_X86 | ||
200 | __asm__ volatile( | ||
201 | "movl %0, %%ecx \n\t" | ||
202 | "xorl %%eax, %%eax \n\t" | ||
203 | "shrdl %%cl, %1, %%eax \n\t" | ||
204 | "shrl %%cl, %1 \n\t" | ||
205 | "movl %0, %%ecx \n\t" | ||
206 | "shrl $3, %%ecx \n\t" | ||
207 | "andl $0xFFFFFFFC, %%ecx \n\t" | ||
208 | "bswapl %1 \n\t" | ||
209 | "orl %1, (%2, %%ecx) \n\t" | ||
210 | "bswapl %%eax \n\t" | ||
211 | "addl %3, %0 \n\t" | ||
212 | "movl %%eax, 4(%2, %%ecx) \n\t" | ||
213 | : "=&r" (s->index), "=&r" (value) | ||
214 | : "r" (s->buf), "r" (n), "0" (s->index), "1" (value<<(-n)) | ||
215 | : "%eax", "%ecx" | ||
216 | ); | ||
217 | # else | ||
218 | int index= s->index; | ||
219 | uint32_t *ptr= ((uint32_t *)s->buf)+(index>>5); | ||
220 | |||
221 | value<<= 32-n; | ||
222 | |||
223 | ptr[0] |= be2me_32(value>>(index&31)); | ||
224 | ptr[1] = be2me_32(value<<(32-(index&31))); | ||
225 | //if(n>24) printf("%d %d\n", n, value); | ||
226 | index+= n; | ||
227 | s->index= index; | ||
228 | # endif | ||
229 | # else //ALIGNED_BITSTREAM_WRITER | ||
230 | # if ARCH_X86 | ||
231 | __asm__ volatile( | ||
232 | "movl $7, %%ecx \n\t" | ||
233 | "andl %0, %%ecx \n\t" | ||
234 | "addl %3, %%ecx \n\t" | ||
235 | "negl %%ecx \n\t" | ||
236 | "shll %%cl, %1 \n\t" | ||
237 | "bswapl %1 \n\t" | ||
238 | "movl %0, %%ecx \n\t" | ||
239 | "shrl $3, %%ecx \n\t" | ||
240 | "orl %1, (%%ecx, %2) \n\t" | ||
241 | "addl %3, %0 \n\t" | ||
242 | "movl $0, 4(%%ecx, %2) \n\t" | ||
243 | : "=&r" (s->index), "=&r" (value) | ||
244 | : "r" (s->buf), "r" (n), "0" (s->index), "1" (value) | ||
245 | : "%ecx" | ||
246 | ); | ||
247 | # else | ||
248 | int index= s->index; | ||
249 | uint32_t *ptr= (uint32_t*)(((uint8_t *)s->buf)+(index>>3)); | ||
250 | |||
251 | ptr[0] |= be2me_32(value<<(32-n-(index&7) )); | ||
252 | ptr[1] = 0; | ||
253 | //if(n>24) printf("%d %d\n", n, value); | ||
254 | index+= n; | ||
255 | s->index= index; | ||
256 | # endif | ||
257 | # endif //!ALIGNED_BITSTREAM_WRITER | ||
258 | } | ||
259 | #endif | ||
260 | |||
261 | static inline void put_sbits(PutBitContext *pb, int n, int32_t value) | ||
262 | { | ||
263 | //assert(n >= 0 && n <= 31); | ||
264 | |||
265 | put_bits(pb, n, value & ((1<<n)-1)); | ||
266 | } | ||
267 | |||
268 | /** | ||
269 | * Returns the pointer to the byte where the bitstream writer will put | ||
270 | * the next bit. | ||
271 | */ | ||
272 | static inline uint8_t* put_bits_ptr(PutBitContext *s) | ||
273 | { | ||
274 | #ifdef ALT_BITSTREAM_WRITER | ||
275 | return s->buf + (s->index>>3); | ||
276 | #else | ||
277 | return s->buf_ptr; | ||
278 | #endif | ||
279 | } | ||
280 | |||
281 | /** | ||
282 | * Skips the given number of bytes. | ||
283 | * PutBitContext must be flushed & aligned to a byte boundary before calling this. | ||
284 | */ | ||
285 | static inline void skip_put_bytes(PutBitContext *s, int n) | ||
286 | { | ||
287 | //assert((put_bits_count(s)&7)==0); | ||
288 | #ifdef ALT_BITSTREAM_WRITER | ||
289 | FIXME may need some cleaning of the buffer | ||
290 | s->index += n<<3; | ||
291 | #else | ||
292 | //assert(s->bit_left==32); | ||
293 | s->buf_ptr += n; | ||
294 | #endif | ||
295 | } | ||
296 | |||
297 | /** | ||
298 | * Skips the given number of bits. | ||
299 | * Must only be used if the actual values in the bitstream do not matter. | ||
300 | * If n is 0 the behavior is undefined. | ||
301 | */ | ||
302 | static inline void skip_put_bits(PutBitContext *s, int n) | ||
303 | { | ||
304 | #ifdef ALT_BITSTREAM_WRITER | ||
305 | s->index += n; | ||
306 | #else | ||
307 | s->bit_left -= n; | ||
308 | s->buf_ptr-= 4*(s->bit_left>>5); | ||
309 | s->bit_left &= 31; | ||
310 | #endif | ||
311 | } | ||
312 | |||
313 | /** | ||
314 | * Changes the end of the buffer. | ||
315 | * | ||
316 | * @param size the new size in bytes of the buffer where to put bits | ||
317 | */ | ||
318 | static inline void set_put_bits_buffer_size(PutBitContext *s, int size) | ||
319 | { | ||
320 | s->buf_end= s->buf + size; | ||
321 | } | ||
322 | |||
323 | #endif /* AVCODEC_PUT_BITS_H */ | ||