Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 1 | /* libFLAC - Free Lossless Audio Codec library |
Robert Shih | 31e4f31 | 2015-01-05 17:35:54 -0800 | [diff] [blame] | 2 | * Copyright (C) 2000-2009 Josh Coalson |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 3 | * Copyright (C) 2011-2016 Xiph.Org Foundation |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * |
| 9 | * - Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * |
| 12 | * - Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * |
| 16 | * - Neither the name of the Xiph.org Foundation nor the names of its |
| 17 | * contributors may be used to endorse or promote products derived from |
| 18 | * this software without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 21 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 23 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR |
| 24 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 25 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 26 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 27 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 28 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 29 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 30 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | */ |
| 32 | |
Robert Shih | 31e4f31 | 2015-01-05 17:35:54 -0800 | [diff] [blame] | 33 | #ifdef HAVE_CONFIG_H |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 34 | # include <config.h> |
| 35 | #endif |
| 36 | |
Robert Shih | 31e4f31 | 2015-01-05 17:35:54 -0800 | [diff] [blame] | 37 | #include <stdlib.h> |
| 38 | #include <string.h> |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 39 | #include "private/bitwriter.h" |
| 40 | #include "private/crc.h" |
Robert Shih | 31e4f31 | 2015-01-05 17:35:54 -0800 | [diff] [blame] | 41 | #include "private/macros.h" |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 42 | #include "FLAC/assert.h" |
| 43 | #include "share/alloc.h" |
Robert Shih | 31e4f31 | 2015-01-05 17:35:54 -0800 | [diff] [blame] | 44 | #include "share/compat.h" |
| 45 | #include "share/endswap.h" |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 46 | |
| 47 | /* Things should be fastest when this matches the machine word size */ |
| 48 | /* WATCHOUT: if you change this you must also change the following #defines down to SWAP_BE_WORD_TO_HOST below to match */ |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 49 | /* WATCHOUT: there are a few places where the code will not work unless bwword is >= 32 bits wide */ |
| 50 | |
| 51 | #if (ENABLE_64_BIT_WORDS == 0) |
| 52 | |
| 53 | typedef FLAC__uint32 bwword; |
| 54 | #define FLAC__BYTES_PER_WORD 4 /* sizeof bwword */ |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 55 | #define FLAC__BITS_PER_WORD 32 |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 56 | /* SWAP_BE_WORD_TO_HOST swaps bytes in a bwword (which is always big-endian) if necessary to match host byte order */ |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 57 | #if WORDS_BIGENDIAN |
| 58 | #define SWAP_BE_WORD_TO_HOST(x) (x) |
| 59 | #else |
Robert Shih | 31e4f31 | 2015-01-05 17:35:54 -0800 | [diff] [blame] | 60 | #define SWAP_BE_WORD_TO_HOST(x) ENDSWAP_32(x) |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 61 | #endif |
| 62 | |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 63 | #else |
| 64 | |
| 65 | typedef FLAC__uint64 bwword; |
| 66 | #define FLAC__BYTES_PER_WORD 8 /* sizeof bwword */ |
| 67 | #define FLAC__BITS_PER_WORD 64 |
| 68 | /* SWAP_BE_WORD_TO_HOST swaps bytes in a bwword (which is always big-endian) if necessary to match host byte order */ |
| 69 | #if WORDS_BIGENDIAN |
| 70 | #define SWAP_BE_WORD_TO_HOST(x) (x) |
| 71 | #else |
| 72 | #define SWAP_BE_WORD_TO_HOST(x) ENDSWAP_64(x) |
| 73 | #endif |
| 74 | |
| 75 | #endif |
| 76 | |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 77 | /* |
| 78 | * The default capacity here doesn't matter too much. The buffer always grows |
| 79 | * to hold whatever is written to it. Usually the encoder will stop adding at |
| 80 | * a frame or metadata block, then write that out and clear the buffer for the |
| 81 | * next one. |
| 82 | */ |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 83 | static const unsigned FLAC__BITWRITER_DEFAULT_CAPACITY = 32768u / sizeof(bwword); /* size in words */ |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 84 | /* When growing, increment 4K at a time */ |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 85 | static const unsigned FLAC__BITWRITER_DEFAULT_INCREMENT = 4096u / sizeof(bwword); /* size in words */ |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 86 | |
| 87 | #define FLAC__WORDS_TO_BITS(words) ((words) * FLAC__BITS_PER_WORD) |
| 88 | #define FLAC__TOTAL_BITS(bw) (FLAC__WORDS_TO_BITS((bw)->words) + (bw)->bits) |
| 89 | |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 90 | struct FLAC__BitWriter { |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 91 | bwword *buffer; |
| 92 | bwword accum; /* accumulator; bits are right-justified; when full, accum is appended to buffer */ |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 93 | unsigned capacity; /* capacity of buffer in words */ |
| 94 | unsigned words; /* # of complete words in buffer */ |
| 95 | unsigned bits; /* # of used bits in accum */ |
| 96 | }; |
| 97 | |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 98 | /* * WATCHOUT: The current implementation only grows the buffer. */ |
Robert Shih | 31e4f31 | 2015-01-05 17:35:54 -0800 | [diff] [blame] | 99 | #ifndef __SUNPRO_C |
| 100 | static |
| 101 | #endif |
| 102 | FLAC__bool bitwriter_grow_(FLAC__BitWriter *bw, unsigned bits_to_add) |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 103 | { |
| 104 | unsigned new_capacity; |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 105 | bwword *new_buffer; |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 106 | |
| 107 | FLAC__ASSERT(0 != bw); |
| 108 | FLAC__ASSERT(0 != bw->buffer); |
| 109 | |
| 110 | /* calculate total words needed to store 'bits_to_add' additional bits */ |
| 111 | new_capacity = bw->words + ((bw->bits + bits_to_add + FLAC__BITS_PER_WORD - 1) / FLAC__BITS_PER_WORD); |
| 112 | |
| 113 | /* it's possible (due to pessimism in the growth estimation that |
| 114 | * leads to this call) that we don't actually need to grow |
| 115 | */ |
| 116 | if(bw->capacity >= new_capacity) |
| 117 | return true; |
| 118 | |
| 119 | /* round up capacity increase to the nearest FLAC__BITWRITER_DEFAULT_INCREMENT */ |
| 120 | if((new_capacity - bw->capacity) % FLAC__BITWRITER_DEFAULT_INCREMENT) |
| 121 | new_capacity += FLAC__BITWRITER_DEFAULT_INCREMENT - ((new_capacity - bw->capacity) % FLAC__BITWRITER_DEFAULT_INCREMENT); |
| 122 | /* make sure we got everything right */ |
| 123 | FLAC__ASSERT(0 == (new_capacity - bw->capacity) % FLAC__BITWRITER_DEFAULT_INCREMENT); |
| 124 | FLAC__ASSERT(new_capacity > bw->capacity); |
| 125 | FLAC__ASSERT(new_capacity >= bw->words + ((bw->bits + bits_to_add + FLAC__BITS_PER_WORD - 1) / FLAC__BITS_PER_WORD)); |
| 126 | |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 127 | new_buffer = safe_realloc_mul_2op_(bw->buffer, sizeof(bwword), /*times*/new_capacity); |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 128 | if(new_buffer == 0) |
| 129 | return false; |
| 130 | bw->buffer = new_buffer; |
| 131 | bw->capacity = new_capacity; |
| 132 | return true; |
| 133 | } |
| 134 | |
| 135 | |
| 136 | /*********************************************************************** |
| 137 | * |
| 138 | * Class constructor/destructor |
| 139 | * |
| 140 | ***********************************************************************/ |
| 141 | |
| 142 | FLAC__BitWriter *FLAC__bitwriter_new(void) |
| 143 | { |
Robert Shih | 31e4f31 | 2015-01-05 17:35:54 -0800 | [diff] [blame] | 144 | FLAC__BitWriter *bw = calloc(1, sizeof(FLAC__BitWriter)); |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 145 | /* note that calloc() sets all members to 0 for us */ |
| 146 | return bw; |
| 147 | } |
| 148 | |
| 149 | void FLAC__bitwriter_delete(FLAC__BitWriter *bw) |
| 150 | { |
| 151 | FLAC__ASSERT(0 != bw); |
| 152 | |
| 153 | FLAC__bitwriter_free(bw); |
| 154 | free(bw); |
| 155 | } |
| 156 | |
| 157 | /*********************************************************************** |
| 158 | * |
| 159 | * Public class methods |
| 160 | * |
| 161 | ***********************************************************************/ |
| 162 | |
| 163 | FLAC__bool FLAC__bitwriter_init(FLAC__BitWriter *bw) |
| 164 | { |
| 165 | FLAC__ASSERT(0 != bw); |
| 166 | |
| 167 | bw->words = bw->bits = 0; |
| 168 | bw->capacity = FLAC__BITWRITER_DEFAULT_CAPACITY; |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 169 | bw->buffer = malloc(sizeof(bwword) * bw->capacity); |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 170 | if(bw->buffer == 0) |
| 171 | return false; |
| 172 | |
| 173 | return true; |
| 174 | } |
| 175 | |
| 176 | void FLAC__bitwriter_free(FLAC__BitWriter *bw) |
| 177 | { |
| 178 | FLAC__ASSERT(0 != bw); |
| 179 | |
| 180 | if(0 != bw->buffer) |
| 181 | free(bw->buffer); |
| 182 | bw->buffer = 0; |
| 183 | bw->capacity = 0; |
| 184 | bw->words = bw->bits = 0; |
| 185 | } |
| 186 | |
| 187 | void FLAC__bitwriter_clear(FLAC__BitWriter *bw) |
| 188 | { |
| 189 | bw->words = bw->bits = 0; |
| 190 | } |
| 191 | |
| 192 | void FLAC__bitwriter_dump(const FLAC__BitWriter *bw, FILE *out) |
| 193 | { |
| 194 | unsigned i, j; |
| 195 | if(bw == 0) { |
| 196 | fprintf(out, "bitwriter is NULL\n"); |
| 197 | } |
| 198 | else { |
| 199 | fprintf(out, "bitwriter: capacity=%u words=%u bits=%u total_bits=%u\n", bw->capacity, bw->words, bw->bits, FLAC__TOTAL_BITS(bw)); |
| 200 | |
| 201 | for(i = 0; i < bw->words; i++) { |
| 202 | fprintf(out, "%08X: ", i); |
| 203 | for(j = 0; j < FLAC__BITS_PER_WORD; j++) |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 204 | fprintf(out, "%01u", bw->buffer[i] & ((bwword)1 << (FLAC__BITS_PER_WORD-j-1)) ? 1:0); |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 205 | fprintf(out, "\n"); |
| 206 | } |
| 207 | if(bw->bits > 0) { |
| 208 | fprintf(out, "%08X: ", i); |
| 209 | for(j = 0; j < bw->bits; j++) |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 210 | fprintf(out, "%01u", bw->accum & ((bwword)1 << (bw->bits-j-1)) ? 1:0); |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 211 | fprintf(out, "\n"); |
| 212 | } |
| 213 | } |
| 214 | } |
| 215 | |
| 216 | FLAC__bool FLAC__bitwriter_get_write_crc16(FLAC__BitWriter *bw, FLAC__uint16 *crc) |
| 217 | { |
| 218 | const FLAC__byte *buffer; |
| 219 | size_t bytes; |
| 220 | |
| 221 | FLAC__ASSERT((bw->bits & 7) == 0); /* assert that we're byte-aligned */ |
| 222 | |
| 223 | if(!FLAC__bitwriter_get_buffer(bw, &buffer, &bytes)) |
| 224 | return false; |
| 225 | |
| 226 | *crc = (FLAC__uint16)FLAC__crc16(buffer, bytes); |
| 227 | FLAC__bitwriter_release_buffer(bw); |
| 228 | return true; |
| 229 | } |
| 230 | |
| 231 | FLAC__bool FLAC__bitwriter_get_write_crc8(FLAC__BitWriter *bw, FLAC__byte *crc) |
| 232 | { |
| 233 | const FLAC__byte *buffer; |
| 234 | size_t bytes; |
| 235 | |
| 236 | FLAC__ASSERT((bw->bits & 7) == 0); /* assert that we're byte-aligned */ |
| 237 | |
| 238 | if(!FLAC__bitwriter_get_buffer(bw, &buffer, &bytes)) |
| 239 | return false; |
| 240 | |
| 241 | *crc = FLAC__crc8(buffer, bytes); |
| 242 | FLAC__bitwriter_release_buffer(bw); |
| 243 | return true; |
| 244 | } |
| 245 | |
| 246 | FLAC__bool FLAC__bitwriter_is_byte_aligned(const FLAC__BitWriter *bw) |
| 247 | { |
| 248 | return ((bw->bits & 7) == 0); |
| 249 | } |
| 250 | |
| 251 | unsigned FLAC__bitwriter_get_input_bits_unconsumed(const FLAC__BitWriter *bw) |
| 252 | { |
| 253 | return FLAC__TOTAL_BITS(bw); |
| 254 | } |
| 255 | |
| 256 | FLAC__bool FLAC__bitwriter_get_buffer(FLAC__BitWriter *bw, const FLAC__byte **buffer, size_t *bytes) |
| 257 | { |
| 258 | FLAC__ASSERT((bw->bits & 7) == 0); |
| 259 | /* double protection */ |
| 260 | if(bw->bits & 7) |
| 261 | return false; |
| 262 | /* if we have bits in the accumulator we have to flush those to the buffer first */ |
| 263 | if(bw->bits) { |
| 264 | FLAC__ASSERT(bw->words <= bw->capacity); |
| 265 | if(bw->words == bw->capacity && !bitwriter_grow_(bw, FLAC__BITS_PER_WORD)) |
| 266 | return false; |
| 267 | /* append bits as complete word to buffer, but don't change bw->accum or bw->bits */ |
| 268 | bw->buffer[bw->words] = SWAP_BE_WORD_TO_HOST(bw->accum << (FLAC__BITS_PER_WORD-bw->bits)); |
| 269 | } |
| 270 | /* now we can just return what we have */ |
| 271 | *buffer = (FLAC__byte*)bw->buffer; |
| 272 | *bytes = (FLAC__BYTES_PER_WORD * bw->words) + (bw->bits >> 3); |
| 273 | return true; |
| 274 | } |
| 275 | |
| 276 | void FLAC__bitwriter_release_buffer(FLAC__BitWriter *bw) |
| 277 | { |
| 278 | /* nothing to do. in the future, strict checking of a 'writer-is-in- |
| 279 | * get-mode' flag could be added everywhere and then cleared here |
| 280 | */ |
| 281 | (void)bw; |
| 282 | } |
| 283 | |
Robert Shih | 31e4f31 | 2015-01-05 17:35:54 -0800 | [diff] [blame] | 284 | inline FLAC__bool FLAC__bitwriter_write_zeroes(FLAC__BitWriter *bw, unsigned bits) |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 285 | { |
| 286 | unsigned n; |
| 287 | |
| 288 | FLAC__ASSERT(0 != bw); |
| 289 | FLAC__ASSERT(0 != bw->buffer); |
| 290 | |
| 291 | if(bits == 0) |
| 292 | return true; |
| 293 | /* slightly pessimistic size check but faster than "<= bw->words + (bw->bits+bits+FLAC__BITS_PER_WORD-1)/FLAC__BITS_PER_WORD" */ |
| 294 | if(bw->capacity <= bw->words + bits && !bitwriter_grow_(bw, bits)) |
| 295 | return false; |
| 296 | /* first part gets to word alignment */ |
| 297 | if(bw->bits) { |
Robert Shih | 31e4f31 | 2015-01-05 17:35:54 -0800 | [diff] [blame] | 298 | n = flac_min(FLAC__BITS_PER_WORD - bw->bits, bits); |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 299 | bw->accum <<= n; |
| 300 | bits -= n; |
| 301 | bw->bits += n; |
| 302 | if(bw->bits == FLAC__BITS_PER_WORD) { |
| 303 | bw->buffer[bw->words++] = SWAP_BE_WORD_TO_HOST(bw->accum); |
| 304 | bw->bits = 0; |
| 305 | } |
| 306 | else |
| 307 | return true; |
| 308 | } |
| 309 | /* do whole words */ |
| 310 | while(bits >= FLAC__BITS_PER_WORD) { |
| 311 | bw->buffer[bw->words++] = 0; |
| 312 | bits -= FLAC__BITS_PER_WORD; |
| 313 | } |
| 314 | /* do any leftovers */ |
| 315 | if(bits > 0) { |
| 316 | bw->accum = 0; |
| 317 | bw->bits = bits; |
| 318 | } |
| 319 | return true; |
| 320 | } |
| 321 | |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 322 | static inline FLAC__bool FLAC__bitwriter_write_raw_uint32_nocheck(FLAC__BitWriter *bw, FLAC__uint32 val, unsigned bits) |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 323 | { |
| 324 | register unsigned left; |
| 325 | |
| 326 | /* WATCHOUT: code does not work with <32bit words; we can make things much faster with this assertion */ |
| 327 | FLAC__ASSERT(FLAC__BITS_PER_WORD >= 32); |
| 328 | |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 329 | if(bw == 0 || bw->buffer == 0) |
| 330 | return false; |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 331 | |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 332 | if (bits > 32) |
| 333 | return false; |
| 334 | |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 335 | if(bits == 0) |
| 336 | return true; |
| 337 | |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 338 | FLAC__ASSERT((bits == 32) || (val>>bits == 0)); |
| 339 | |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 340 | /* slightly pessimistic size check but faster than "<= bw->words + (bw->bits+bits+FLAC__BITS_PER_WORD-1)/FLAC__BITS_PER_WORD" */ |
| 341 | if(bw->capacity <= bw->words + bits && !bitwriter_grow_(bw, bits)) |
| 342 | return false; |
| 343 | |
| 344 | left = FLAC__BITS_PER_WORD - bw->bits; |
| 345 | if(bits < left) { |
| 346 | bw->accum <<= bits; |
| 347 | bw->accum |= val; |
| 348 | bw->bits += bits; |
| 349 | } |
| 350 | else if(bw->bits) { /* WATCHOUT: if bw->bits == 0, left==FLAC__BITS_PER_WORD and bw->accum<<=left is a NOP instead of setting to 0 */ |
| 351 | bw->accum <<= left; |
| 352 | bw->accum |= val >> (bw->bits = bits - left); |
| 353 | bw->buffer[bw->words++] = SWAP_BE_WORD_TO_HOST(bw->accum); |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 354 | bw->accum = val; /* unused top bits can contain garbage */ |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 355 | } |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 356 | else { /* at this point bits == FLAC__BITS_PER_WORD == 32 and bw->bits == 0 */ |
| 357 | bw->buffer[bw->words++] = SWAP_BE_WORD_TO_HOST((bwword)val); |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 358 | } |
| 359 | |
| 360 | return true; |
| 361 | } |
| 362 | |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 363 | inline FLAC__bool FLAC__bitwriter_write_raw_uint32(FLAC__BitWriter *bw, FLAC__uint32 val, unsigned bits) |
| 364 | { |
| 365 | /* check that unused bits are unset */ |
| 366 | if((bits < 32) && (val>>bits != 0)) |
| 367 | return false; |
| 368 | |
| 369 | return FLAC__bitwriter_write_raw_uint32_nocheck(bw, val, bits); |
| 370 | } |
| 371 | |
Robert Shih | 31e4f31 | 2015-01-05 17:35:54 -0800 | [diff] [blame] | 372 | inline FLAC__bool FLAC__bitwriter_write_raw_int32(FLAC__BitWriter *bw, FLAC__int32 val, unsigned bits) |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 373 | { |
| 374 | /* zero-out unused bits */ |
| 375 | if(bits < 32) |
| 376 | val &= (~(0xffffffff << bits)); |
| 377 | |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 378 | return FLAC__bitwriter_write_raw_uint32_nocheck(bw, (FLAC__uint32)val, bits); |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 379 | } |
| 380 | |
Robert Shih | 31e4f31 | 2015-01-05 17:35:54 -0800 | [diff] [blame] | 381 | inline FLAC__bool FLAC__bitwriter_write_raw_uint64(FLAC__BitWriter *bw, FLAC__uint64 val, unsigned bits) |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 382 | { |
| 383 | /* this could be a little faster but it's not used for much */ |
| 384 | if(bits > 32) { |
| 385 | return |
| 386 | FLAC__bitwriter_write_raw_uint32(bw, (FLAC__uint32)(val>>32), bits-32) && |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 387 | FLAC__bitwriter_write_raw_uint32_nocheck(bw, (FLAC__uint32)val, 32); |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 388 | } |
| 389 | else |
| 390 | return FLAC__bitwriter_write_raw_uint32(bw, (FLAC__uint32)val, bits); |
| 391 | } |
| 392 | |
Robert Shih | 31e4f31 | 2015-01-05 17:35:54 -0800 | [diff] [blame] | 393 | inline FLAC__bool FLAC__bitwriter_write_raw_uint32_little_endian(FLAC__BitWriter *bw, FLAC__uint32 val) |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 394 | { |
| 395 | /* this doesn't need to be that fast as currently it is only used for vorbis comments */ |
| 396 | |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 397 | if(!FLAC__bitwriter_write_raw_uint32_nocheck(bw, val & 0xff, 8)) |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 398 | return false; |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 399 | if(!FLAC__bitwriter_write_raw_uint32_nocheck(bw, (val>>8) & 0xff, 8)) |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 400 | return false; |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 401 | if(!FLAC__bitwriter_write_raw_uint32_nocheck(bw, (val>>16) & 0xff, 8)) |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 402 | return false; |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 403 | if(!FLAC__bitwriter_write_raw_uint32_nocheck(bw, val>>24, 8)) |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 404 | return false; |
| 405 | |
| 406 | return true; |
| 407 | } |
| 408 | |
Robert Shih | 31e4f31 | 2015-01-05 17:35:54 -0800 | [diff] [blame] | 409 | inline FLAC__bool FLAC__bitwriter_write_byte_block(FLAC__BitWriter *bw, const FLAC__byte vals[], unsigned nvals) |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 410 | { |
| 411 | unsigned i; |
| 412 | |
| 413 | /* this could be faster but currently we don't need it to be since it's only used for writing metadata */ |
| 414 | for(i = 0; i < nvals; i++) { |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 415 | if(!FLAC__bitwriter_write_raw_uint32_nocheck(bw, (FLAC__uint32)(vals[i]), 8)) |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 416 | return false; |
| 417 | } |
| 418 | |
| 419 | return true; |
| 420 | } |
| 421 | |
| 422 | FLAC__bool FLAC__bitwriter_write_unary_unsigned(FLAC__BitWriter *bw, unsigned val) |
| 423 | { |
| 424 | if(val < 32) |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 425 | return FLAC__bitwriter_write_raw_uint32_nocheck(bw, 1, ++val); |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 426 | else |
| 427 | return |
| 428 | FLAC__bitwriter_write_zeroes(bw, val) && |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 429 | FLAC__bitwriter_write_raw_uint32_nocheck(bw, 1, 1); |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 430 | } |
| 431 | |
| 432 | unsigned FLAC__bitwriter_rice_bits(FLAC__int32 val, unsigned parameter) |
| 433 | { |
| 434 | FLAC__uint32 uval; |
| 435 | |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 436 | FLAC__ASSERT(parameter < 32); |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 437 | |
| 438 | /* fold signed to unsigned; actual formula is: negative(v)? -2v-1 : 2v */ |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 439 | uval = val; |
| 440 | uval <<= 1; |
| 441 | uval ^= (val>>31); |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 442 | |
| 443 | return 1 + parameter + (uval >> parameter); |
| 444 | } |
| 445 | |
| 446 | #if 0 /* UNUSED */ |
| 447 | unsigned FLAC__bitwriter_golomb_bits_signed(int val, unsigned parameter) |
| 448 | { |
| 449 | unsigned bits, msbs, uval; |
| 450 | unsigned k; |
| 451 | |
| 452 | FLAC__ASSERT(parameter > 0); |
| 453 | |
| 454 | /* fold signed to unsigned */ |
| 455 | if(val < 0) |
| 456 | uval = (unsigned)(((-(++val)) << 1) + 1); |
| 457 | else |
| 458 | uval = (unsigned)(val << 1); |
| 459 | |
| 460 | k = FLAC__bitmath_ilog2(parameter); |
| 461 | if(parameter == 1u<<k) { |
| 462 | FLAC__ASSERT(k <= 30); |
| 463 | |
| 464 | msbs = uval >> k; |
| 465 | bits = 1 + k + msbs; |
| 466 | } |
| 467 | else { |
| 468 | unsigned q, r, d; |
| 469 | |
| 470 | d = (1 << (k+1)) - parameter; |
| 471 | q = uval / parameter; |
| 472 | r = uval - (q * parameter); |
| 473 | |
| 474 | bits = 1 + q + k; |
| 475 | if(r >= d) |
| 476 | bits++; |
| 477 | } |
| 478 | return bits; |
| 479 | } |
| 480 | |
| 481 | unsigned FLAC__bitwriter_golomb_bits_unsigned(unsigned uval, unsigned parameter) |
| 482 | { |
| 483 | unsigned bits, msbs; |
| 484 | unsigned k; |
| 485 | |
| 486 | FLAC__ASSERT(parameter > 0); |
| 487 | |
| 488 | k = FLAC__bitmath_ilog2(parameter); |
| 489 | if(parameter == 1u<<k) { |
| 490 | FLAC__ASSERT(k <= 30); |
| 491 | |
| 492 | msbs = uval >> k; |
| 493 | bits = 1 + k + msbs; |
| 494 | } |
| 495 | else { |
| 496 | unsigned q, r, d; |
| 497 | |
| 498 | d = (1 << (k+1)) - parameter; |
| 499 | q = uval / parameter; |
| 500 | r = uval - (q * parameter); |
| 501 | |
| 502 | bits = 1 + q + k; |
| 503 | if(r >= d) |
| 504 | bits++; |
| 505 | } |
| 506 | return bits; |
| 507 | } |
| 508 | #endif /* UNUSED */ |
| 509 | |
| 510 | FLAC__bool FLAC__bitwriter_write_rice_signed(FLAC__BitWriter *bw, FLAC__int32 val, unsigned parameter) |
| 511 | { |
| 512 | unsigned total_bits, interesting_bits, msbs; |
| 513 | FLAC__uint32 uval, pattern; |
| 514 | |
| 515 | FLAC__ASSERT(0 != bw); |
| 516 | FLAC__ASSERT(0 != bw->buffer); |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 517 | FLAC__ASSERT(parameter < 32); |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 518 | |
| 519 | /* fold signed to unsigned; actual formula is: negative(v)? -2v-1 : 2v */ |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 520 | uval = val; |
| 521 | uval <<= 1; |
| 522 | uval ^= (val>>31); |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 523 | |
| 524 | msbs = uval >> parameter; |
| 525 | interesting_bits = 1 + parameter; |
| 526 | total_bits = interesting_bits + msbs; |
| 527 | pattern = 1 << parameter; /* the unary end bit */ |
| 528 | pattern |= (uval & ((1<<parameter)-1)); /* the binary LSBs */ |
| 529 | |
| 530 | if(total_bits <= 32) |
| 531 | return FLAC__bitwriter_write_raw_uint32(bw, pattern, total_bits); |
| 532 | else |
| 533 | return |
| 534 | FLAC__bitwriter_write_zeroes(bw, msbs) && /* write the unary MSBs */ |
| 535 | FLAC__bitwriter_write_raw_uint32(bw, pattern, interesting_bits); /* write the unary end bit and binary LSBs */ |
| 536 | } |
| 537 | |
| 538 | FLAC__bool FLAC__bitwriter_write_rice_signed_block(FLAC__BitWriter *bw, const FLAC__int32 *vals, unsigned nvals, unsigned parameter) |
| 539 | { |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 540 | const FLAC__uint32 mask1 = (FLAC__uint32)0xffffffff << parameter; /* we val|=mask1 to set the stop bit above it... */ |
| 541 | const FLAC__uint32 mask2 = (FLAC__uint32)0xffffffff >> (31-parameter); /* ...then mask off the bits above the stop bit with val&=mask2 */ |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 542 | FLAC__uint32 uval; |
| 543 | unsigned left; |
| 544 | const unsigned lsbits = 1 + parameter; |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 545 | unsigned msbits, total_bits; |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 546 | |
| 547 | FLAC__ASSERT(0 != bw); |
| 548 | FLAC__ASSERT(0 != bw->buffer); |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 549 | FLAC__ASSERT(parameter < 31); |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 550 | /* WATCHOUT: code does not work with <32bit words; we can make things much faster with this assertion */ |
| 551 | FLAC__ASSERT(FLAC__BITS_PER_WORD >= 32); |
| 552 | |
| 553 | while(nvals) { |
| 554 | /* fold signed to unsigned; actual formula is: negative(v)? -2v-1 : 2v */ |
Robert Shih | 02eaed7 | 2015-08-20 16:43:30 -0700 | [diff] [blame] | 555 | uval = *vals; |
| 556 | uval <<= 1; |
| 557 | uval ^= (*vals>>31); |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 558 | |
| 559 | msbits = uval >> parameter; |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 560 | total_bits = lsbits + msbits; |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 561 | |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 562 | if(bw->bits && bw->bits + total_bits < FLAC__BITS_PER_WORD) { /* i.e. if the whole thing fits in the current bwword */ |
| 563 | /* ^^^ if bw->bits is 0 then we may have filled the buffer and have no free bwword to work in */ |
| 564 | bw->bits += total_bits; |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 565 | uval |= mask1; /* set stop bit */ |
| 566 | uval &= mask2; /* mask off unused top bits */ |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 567 | bw->accum <<= total_bits; |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 568 | bw->accum |= uval; |
| 569 | } |
| 570 | else { |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 571 | /* slightly pessimistic size check but faster than "<= bw->words + (bw->bits+msbits+lsbits+FLAC__BITS_PER_WORD-1)/FLAC__BITS_PER_WORD" */ |
| 572 | /* OPT: pessimism may cause flurry of false calls to grow_ which eat up all savings before it */ |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 573 | if(bw->capacity <= bw->words + bw->bits + msbits + 1 /* lsbits always fit in 1 bwword */ && !bitwriter_grow_(bw, total_bits)) |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 574 | return false; |
| 575 | |
| 576 | if(msbits) { |
| 577 | /* first part gets to word alignment */ |
| 578 | if(bw->bits) { |
| 579 | left = FLAC__BITS_PER_WORD - bw->bits; |
| 580 | if(msbits < left) { |
| 581 | bw->accum <<= msbits; |
| 582 | bw->bits += msbits; |
| 583 | goto break1; |
| 584 | } |
| 585 | else { |
| 586 | bw->accum <<= left; |
| 587 | msbits -= left; |
| 588 | bw->buffer[bw->words++] = SWAP_BE_WORD_TO_HOST(bw->accum); |
| 589 | bw->bits = 0; |
| 590 | } |
| 591 | } |
| 592 | /* do whole words */ |
| 593 | while(msbits >= FLAC__BITS_PER_WORD) { |
| 594 | bw->buffer[bw->words++] = 0; |
| 595 | msbits -= FLAC__BITS_PER_WORD; |
| 596 | } |
| 597 | /* do any leftovers */ |
| 598 | if(msbits > 0) { |
| 599 | bw->accum = 0; |
| 600 | bw->bits = msbits; |
| 601 | } |
| 602 | } |
| 603 | break1: |
| 604 | uval |= mask1; /* set stop bit */ |
| 605 | uval &= mask2; /* mask off unused top bits */ |
| 606 | |
| 607 | left = FLAC__BITS_PER_WORD - bw->bits; |
| 608 | if(lsbits < left) { |
| 609 | bw->accum <<= lsbits; |
| 610 | bw->accum |= uval; |
| 611 | bw->bits += lsbits; |
| 612 | } |
| 613 | else { |
| 614 | /* if bw->bits == 0, left==FLAC__BITS_PER_WORD which will always |
| 615 | * be > lsbits (because of previous assertions) so it would have |
| 616 | * triggered the (lsbits<left) case above. |
| 617 | */ |
| 618 | FLAC__ASSERT(bw->bits); |
| 619 | FLAC__ASSERT(left < FLAC__BITS_PER_WORD); |
| 620 | bw->accum <<= left; |
| 621 | bw->accum |= uval >> (bw->bits = lsbits - left); |
| 622 | bw->buffer[bw->words++] = SWAP_BE_WORD_TO_HOST(bw->accum); |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 623 | bw->accum = uval; /* unused top bits can contain garbage */ |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 624 | } |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 625 | } |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 626 | vals++; |
| 627 | nvals--; |
| 628 | } |
| 629 | return true; |
| 630 | } |
| 631 | |
| 632 | #if 0 /* UNUSED */ |
| 633 | FLAC__bool FLAC__bitwriter_write_golomb_signed(FLAC__BitWriter *bw, int val, unsigned parameter) |
| 634 | { |
| 635 | unsigned total_bits, msbs, uval; |
| 636 | unsigned k; |
| 637 | |
| 638 | FLAC__ASSERT(0 != bw); |
| 639 | FLAC__ASSERT(0 != bw->buffer); |
| 640 | FLAC__ASSERT(parameter > 0); |
| 641 | |
| 642 | /* fold signed to unsigned */ |
| 643 | if(val < 0) |
| 644 | uval = (unsigned)(((-(++val)) << 1) + 1); |
| 645 | else |
| 646 | uval = (unsigned)(val << 1); |
| 647 | |
| 648 | k = FLAC__bitmath_ilog2(parameter); |
| 649 | if(parameter == 1u<<k) { |
| 650 | unsigned pattern; |
| 651 | |
| 652 | FLAC__ASSERT(k <= 30); |
| 653 | |
| 654 | msbs = uval >> k; |
| 655 | total_bits = 1 + k + msbs; |
| 656 | pattern = 1 << k; /* the unary end bit */ |
| 657 | pattern |= (uval & ((1u<<k)-1)); /* the binary LSBs */ |
| 658 | |
| 659 | if(total_bits <= 32) { |
| 660 | if(!FLAC__bitwriter_write_raw_uint32(bw, pattern, total_bits)) |
| 661 | return false; |
| 662 | } |
| 663 | else { |
| 664 | /* write the unary MSBs */ |
| 665 | if(!FLAC__bitwriter_write_zeroes(bw, msbs)) |
| 666 | return false; |
| 667 | /* write the unary end bit and binary LSBs */ |
| 668 | if(!FLAC__bitwriter_write_raw_uint32(bw, pattern, k+1)) |
| 669 | return false; |
| 670 | } |
| 671 | } |
| 672 | else { |
| 673 | unsigned q, r, d; |
| 674 | |
| 675 | d = (1 << (k+1)) - parameter; |
| 676 | q = uval / parameter; |
| 677 | r = uval - (q * parameter); |
| 678 | /* write the unary MSBs */ |
| 679 | if(!FLAC__bitwriter_write_zeroes(bw, q)) |
| 680 | return false; |
| 681 | /* write the unary end bit */ |
| 682 | if(!FLAC__bitwriter_write_raw_uint32(bw, 1, 1)) |
| 683 | return false; |
| 684 | /* write the binary LSBs */ |
| 685 | if(r >= d) { |
| 686 | if(!FLAC__bitwriter_write_raw_uint32(bw, r+d, k+1)) |
| 687 | return false; |
| 688 | } |
| 689 | else { |
| 690 | if(!FLAC__bitwriter_write_raw_uint32(bw, r, k)) |
| 691 | return false; |
| 692 | } |
| 693 | } |
| 694 | return true; |
| 695 | } |
| 696 | |
| 697 | FLAC__bool FLAC__bitwriter_write_golomb_unsigned(FLAC__BitWriter *bw, unsigned uval, unsigned parameter) |
| 698 | { |
| 699 | unsigned total_bits, msbs; |
| 700 | unsigned k; |
| 701 | |
| 702 | FLAC__ASSERT(0 != bw); |
| 703 | FLAC__ASSERT(0 != bw->buffer); |
| 704 | FLAC__ASSERT(parameter > 0); |
| 705 | |
| 706 | k = FLAC__bitmath_ilog2(parameter); |
| 707 | if(parameter == 1u<<k) { |
| 708 | unsigned pattern; |
| 709 | |
| 710 | FLAC__ASSERT(k <= 30); |
| 711 | |
| 712 | msbs = uval >> k; |
| 713 | total_bits = 1 + k + msbs; |
| 714 | pattern = 1 << k; /* the unary end bit */ |
| 715 | pattern |= (uval & ((1u<<k)-1)); /* the binary LSBs */ |
| 716 | |
| 717 | if(total_bits <= 32) { |
| 718 | if(!FLAC__bitwriter_write_raw_uint32(bw, pattern, total_bits)) |
| 719 | return false; |
| 720 | } |
| 721 | else { |
| 722 | /* write the unary MSBs */ |
| 723 | if(!FLAC__bitwriter_write_zeroes(bw, msbs)) |
| 724 | return false; |
| 725 | /* write the unary end bit and binary LSBs */ |
| 726 | if(!FLAC__bitwriter_write_raw_uint32(bw, pattern, k+1)) |
| 727 | return false; |
| 728 | } |
| 729 | } |
| 730 | else { |
| 731 | unsigned q, r, d; |
| 732 | |
| 733 | d = (1 << (k+1)) - parameter; |
| 734 | q = uval / parameter; |
| 735 | r = uval - (q * parameter); |
| 736 | /* write the unary MSBs */ |
| 737 | if(!FLAC__bitwriter_write_zeroes(bw, q)) |
| 738 | return false; |
| 739 | /* write the unary end bit */ |
| 740 | if(!FLAC__bitwriter_write_raw_uint32(bw, 1, 1)) |
| 741 | return false; |
| 742 | /* write the binary LSBs */ |
| 743 | if(r >= d) { |
| 744 | if(!FLAC__bitwriter_write_raw_uint32(bw, r+d, k+1)) |
| 745 | return false; |
| 746 | } |
| 747 | else { |
| 748 | if(!FLAC__bitwriter_write_raw_uint32(bw, r, k)) |
| 749 | return false; |
| 750 | } |
| 751 | } |
| 752 | return true; |
| 753 | } |
| 754 | #endif /* UNUSED */ |
| 755 | |
| 756 | FLAC__bool FLAC__bitwriter_write_utf8_uint32(FLAC__BitWriter *bw, FLAC__uint32 val) |
| 757 | { |
| 758 | FLAC__bool ok = 1; |
| 759 | |
| 760 | FLAC__ASSERT(0 != bw); |
| 761 | FLAC__ASSERT(0 != bw->buffer); |
| 762 | |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 763 | if((val & 0x80000000) != 0) /* this version only handles 31 bits */ |
| 764 | return false; |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 765 | |
| 766 | if(val < 0x80) { |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 767 | return FLAC__bitwriter_write_raw_uint32_nocheck(bw, val, 8); |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 768 | } |
| 769 | else if(val < 0x800) { |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 770 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0xC0 | (val>>6), 8); |
| 771 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | (val&0x3F), 8); |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 772 | } |
| 773 | else if(val < 0x10000) { |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 774 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0xE0 | (val>>12), 8); |
| 775 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | ((val>>6)&0x3F), 8); |
| 776 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | (val&0x3F), 8); |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 777 | } |
| 778 | else if(val < 0x200000) { |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 779 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0xF0 | (val>>18), 8); |
| 780 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | ((val>>12)&0x3F), 8); |
| 781 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | ((val>>6)&0x3F), 8); |
| 782 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | (val&0x3F), 8); |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 783 | } |
| 784 | else if(val < 0x4000000) { |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 785 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0xF8 | (val>>24), 8); |
| 786 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | ((val>>18)&0x3F), 8); |
| 787 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | ((val>>12)&0x3F), 8); |
| 788 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | ((val>>6)&0x3F), 8); |
| 789 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | (val&0x3F), 8); |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 790 | } |
| 791 | else { |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 792 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0xFC | (val>>30), 8); |
| 793 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | ((val>>24)&0x3F), 8); |
| 794 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | ((val>>18)&0x3F), 8); |
| 795 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | ((val>>12)&0x3F), 8); |
| 796 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | ((val>>6)&0x3F), 8); |
| 797 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | (val&0x3F), 8); |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 798 | } |
| 799 | |
| 800 | return ok; |
| 801 | } |
| 802 | |
| 803 | FLAC__bool FLAC__bitwriter_write_utf8_uint64(FLAC__BitWriter *bw, FLAC__uint64 val) |
| 804 | { |
| 805 | FLAC__bool ok = 1; |
| 806 | |
| 807 | FLAC__ASSERT(0 != bw); |
| 808 | FLAC__ASSERT(0 != bw->buffer); |
| 809 | |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 810 | if((val & FLAC__U64L(0xFFFFFFF000000000)) != 0) /* this version only handles 36 bits */ |
| 811 | return false; |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 812 | |
| 813 | if(val < 0x80) { |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 814 | return FLAC__bitwriter_write_raw_uint32_nocheck(bw, (FLAC__uint32)val, 8); |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 815 | } |
| 816 | else if(val < 0x800) { |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 817 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0xC0 | (FLAC__uint32)(val>>6), 8); |
| 818 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | (FLAC__uint32)(val&0x3F), 8); |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 819 | } |
| 820 | else if(val < 0x10000) { |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 821 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0xE0 | (FLAC__uint32)(val>>12), 8); |
| 822 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | (FLAC__uint32)((val>>6)&0x3F), 8); |
| 823 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | (FLAC__uint32)(val&0x3F), 8); |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 824 | } |
| 825 | else if(val < 0x200000) { |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 826 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0xF0 | (FLAC__uint32)(val>>18), 8); |
| 827 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | (FLAC__uint32)((val>>12)&0x3F), 8); |
| 828 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | (FLAC__uint32)((val>>6)&0x3F), 8); |
| 829 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | (FLAC__uint32)(val&0x3F), 8); |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 830 | } |
| 831 | else if(val < 0x4000000) { |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 832 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0xF8 | (FLAC__uint32)(val>>24), 8); |
| 833 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | (FLAC__uint32)((val>>18)&0x3F), 8); |
| 834 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | (FLAC__uint32)((val>>12)&0x3F), 8); |
| 835 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | (FLAC__uint32)((val>>6)&0x3F), 8); |
| 836 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | (FLAC__uint32)(val&0x3F), 8); |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 837 | } |
| 838 | else if(val < 0x80000000) { |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 839 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0xFC | (FLAC__uint32)(val>>30), 8); |
| 840 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | (FLAC__uint32)((val>>24)&0x3F), 8); |
| 841 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | (FLAC__uint32)((val>>18)&0x3F), 8); |
| 842 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | (FLAC__uint32)((val>>12)&0x3F), 8); |
| 843 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | (FLAC__uint32)((val>>6)&0x3F), 8); |
| 844 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | (FLAC__uint32)(val&0x3F), 8); |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 845 | } |
| 846 | else { |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 847 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0xFE, 8); |
| 848 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | (FLAC__uint32)((val>>30)&0x3F), 8); |
| 849 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | (FLAC__uint32)((val>>24)&0x3F), 8); |
| 850 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | (FLAC__uint32)((val>>18)&0x3F), 8); |
| 851 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | (FLAC__uint32)((val>>12)&0x3F), 8); |
| 852 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | (FLAC__uint32)((val>>6)&0x3F), 8); |
| 853 | ok &= FLAC__bitwriter_write_raw_uint32_nocheck(bw, 0x80 | (FLAC__uint32)(val&0x3F), 8); |
Kenny Root | c746637 | 2009-11-08 12:46:32 -0600 | [diff] [blame] | 854 | } |
| 855 | |
| 856 | return ok; |
| 857 | } |
| 858 | |
| 859 | FLAC__bool FLAC__bitwriter_zero_pad_to_byte_boundary(FLAC__BitWriter *bw) |
| 860 | { |
| 861 | /* 0-pad to byte boundary */ |
| 862 | if(bw->bits & 7u) |
| 863 | return FLAC__bitwriter_write_zeroes(bw, 8 - (bw->bits & 7u)); |
| 864 | else |
| 865 | return true; |
| 866 | } |
Robert Shih | 31e4f31 | 2015-01-05 17:35:54 -0800 | [diff] [blame] | 867 | |
| 868 | /* These functions are declared inline in this file but are also callable as |
| 869 | * externs from elsewhere. |
| 870 | * According to the C99 spec, section 6.7.4, simply providing a function |
| 871 | * prototype in a header file without 'inline' and making the function inline |
| 872 | * in this file should be sufficient. |
| 873 | * Unfortunately, the Microsoft VS compiler doesn't pick them up externally. To |
| 874 | * fix that we add extern declarations here. |
| 875 | */ |
| 876 | extern FLAC__bool FLAC__bitwriter_write_zeroes(FLAC__BitWriter *bw, unsigned bits); |
Elliott Hughes | ae0e7bc | 2018-01-12 14:46:04 -0800 | [diff] [blame] | 877 | extern FLAC__bool FLAC__bitwriter_write_raw_uint32(FLAC__BitWriter *bw, FLAC__uint32 val, unsigned bits); |
Robert Shih | 31e4f31 | 2015-01-05 17:35:54 -0800 | [diff] [blame] | 878 | extern FLAC__bool FLAC__bitwriter_write_raw_int32(FLAC__BitWriter *bw, FLAC__int32 val, unsigned bits); |
| 879 | extern FLAC__bool FLAC__bitwriter_write_raw_uint64(FLAC__BitWriter *bw, FLAC__uint64 val, unsigned bits); |
| 880 | extern FLAC__bool FLAC__bitwriter_write_raw_uint32_little_endian(FLAC__BitWriter *bw, FLAC__uint32 val); |
| 881 | extern FLAC__bool FLAC__bitwriter_write_byte_block(FLAC__BitWriter *bw, const FLAC__byte vals[], unsigned nvals); |