apps/codecs/libmusepack/mpc_bits_reader.c

   1 /*
   2   Copyright (c) 2007-2009, The Musepack Development Team
   3   All rights reserved.
   4
   5   Redistribution and use in source and binary forms, with or without
   6   modification, are permitted provided that the following conditions are
   7   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
  13   copyright notice, this list of conditions and the following
  14   disclaimer in the documentation and/or other materials provided
  15   with the distribution.
  16
  17   * Neither the name of the The Musepack Development Team nor the
  18   names of its contributors may be used to endorse or promote
  19   products derived from this software without specific prior
  20   written permission.
  21
  22   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  23   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  24   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  25   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  26   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  27   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  28   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  29   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  30   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  31   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  32   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  33 */
  34
  35 #include "mpcdec.h"
  36 #include "internal.h"
  37 #include "huffman.h"
  38 #include "mpc_bits_reader.h"
  39
  40 const mpc_uint32_t Cnk[MAX_ENUM / 2][MAX_ENUM] ICONST_ATTR_MPC_BITSREADER =
  41 {
  42     {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31},
  43     {0, 0, 1, 3, 6, 10, 15, 21, 28, 36, 45, 55, 66, 78, 91, 105, 120, 136, 153, 171, 190, 210, 231, 253, 276, 300, 325, 351, 378, 406, 435, 465},
  44     {0, 0, 0, 1, 4, 10, 20, 35, 56, 84, 120, 165, 220, 286, 364, 455, 560, 680, 816, 969, 1140, 1330, 1540, 1771, 2024, 2300, 2600, 2925, 3276, 3654, 4060, 4495},
  45     {0, 0, 0, 0, 1, 5, 15, 35, 70, 126, 210, 330, 495, 715, 1001, 1365, 1820, 2380, 3060, 3876, 4845, 5985, 7315, 8855, 10626, 12650, 14950, 17550, 20475, 23751, 27405, 31465},
  46     {0, 0, 0, 0, 0, 1, 6, 21, 56, 126, 252, 462, 792, 1287, 2002, 3003, 4368, 6188, 8568, 11628, 15504, 20349, 26334, 33649, 42504, 53130, 65780, 80730, 98280, 118755, 142506, 169911},
  47     {0, 0, 0, 0, 0, 0, 1, 7, 28, 84, 210, 462, 924, 1716, 3003, 5005, 8008, 12376, 18564, 27132, 38760, 54264, 74613, 100947, 134596, 177100, 230230, 296010, 376740, 475020, 593775, 736281},
  48     {0, 0, 0, 0, 0, 0, 0, 1, 8, 36, 120, 330, 792, 1716, 3432, 6435, 11440, 19448, 31824, 50388, 77520, 116280, 170544, 245157, 346104, 480700, 657800, 888030, 1184040, 1560780, 2035800, 2629575},
  49     {0, 0, 0, 0, 0, 0, 0, 0, 1, 9, 45, 165, 495, 1287, 3003, 6435, 12870, 24310, 43758, 75582, 125970, 203490, 319770, 490314, 735471, 1081575, 1562275, 2220075, 3108105, 4292145, 5852925, 7888725},
  50     {0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 10, 55, 220, 715, 2002, 5005, 11440, 24310, 48620, 92378, 167960, 293930, 497420, 817190, 1307504, 2042975, 3124550, 4686825, 6906900, 10015005, 14307150, 20160075},
  51     {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 11, 66, 286, 1001, 3003, 8008, 19448, 43758, 92378, 184756, 352716, 646646, 1144066, 1961256, 3268760, 5311735, 8436285, 13123110, 20030010, 30045015, 44352165},
  52     {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 12, 78, 364, 1365, 4368, 12376, 31824, 75582, 167960, 352716, 705432, 1352078, 2496144, 4457400, 7726160, 13037895, 21474180, 34597290, 54627300, 84672315},
  53     {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 13, 91, 455, 1820, 6188, 18564, 50388, 125970, 293930, 646646, 1352078, 2704156, 5200300, 9657700, 17383860, 30421755, 51895935, 86493225, 141120525},
  54     {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 14, 105, 560, 2380, 8568, 27132, 77520, 203490, 497420, 1144066, 2496144, 5200300, 10400600, 20058300, 37442160, 67863915, 119759850, 206253075},
  55     {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 15, 120, 680, 3060, 11628, 38760, 116280, 319770, 817190, 1961256, 4457400, 9657700, 20058300, 40116600, 77558760, 145422675, 265182525},
  56     {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 16, 136, 816, 3876, 15504, 54264, 170544, 490314, 1307504, 3268760, 7726160, 17383860, 37442160, 77558760, 155117520, 300540195},
  57     {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 17, 153, 969, 4845, 20349, 74613, 245157, 735471, 2042975, 5311735, 13037895, 30421755, 67863915, 145422675, 300540195}
  58 };
  59
  60 const mpc_uint8_t Cnk_len[MAX_ENUM / 2][MAX_ENUM] ICONST_ATTR_MPC_BITSREADER =
  61 {
  62     {0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5},
  63     {0, 0, 2, 3, 4, 4, 5, 5, 6, 6, 6, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9},
  64     {0, 0, 0, 2, 4, 5, 6, 6, 7, 7, 8, 8, 9, 9, 9, 10, 10, 10, 10, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 13, 13},
  65     {0, 0, 0, 0, 3, 4, 6, 7, 7, 8, 9, 9, 10, 10, 11, 11, 12, 12, 12, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 15, 15, 16},
  66     {0, 0, 0, 0, 0, 3, 5, 6, 7, 8, 9, 10, 11, 11, 12, 13, 13, 14, 14, 14, 15, 15, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18},
  67     {0, 0, 0, 0, 0, 0, 3, 5, 7, 8, 9, 10, 11, 12, 13, 13, 14, 15, 15, 16, 16, 17, 17, 18, 18, 18, 19, 19, 19, 20, 20, 20},
  68     {0, 0, 0, 0, 0, 0, 0, 3, 6, 7, 9, 10, 11, 12, 13, 14, 15, 15, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 21, 22, 22},
  69     {0, 0, 0, 0, 0, 0, 0, 0, 4, 6, 8, 9, 11, 12, 13, 14, 15, 16, 17, 17, 18, 19, 19, 20, 21, 21, 22, 22, 23, 23, 23, 24},
  70     {0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 6, 8, 10, 11, 13, 14, 15, 16, 17, 18, 19, 19, 20, 21, 21, 22, 23, 23, 24, 24, 25, 25},
  71     {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 7, 9, 10, 12, 13, 15, 16, 17, 18, 19, 20, 21, 21, 22, 23, 24, 24, 25, 25, 26, 26},
  72     {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 7, 9, 11, 13, 14, 15, 17, 18, 19, 20, 21, 22, 23, 23, 24, 25, 26, 26, 27, 27},
  73     {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 7, 9, 11, 13, 15, 16, 17, 19, 20, 21, 22, 23, 24, 25, 25, 26, 27, 28, 28},
  74     {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 7, 10, 12, 14, 15, 17, 18, 19, 21, 22, 23, 24, 25, 26, 27, 27, 28, 29},
  75     {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 7, 10, 12, 14, 16, 17, 19, 20, 21, 23, 24, 25, 26, 27, 28, 28, 29},
  76     {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 8, 10, 12, 14, 16, 18, 19, 21, 22, 23, 25, 26, 27, 28, 29, 30},
  77     {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 8, 10, 13, 15, 17, 18, 20, 21, 23, 24, 25, 27, 28, 29, 30}
  78
  79 };
  80
  81 const mpc_uint32_t Cnk_lost[MAX_ENUM / 2][MAX_ENUM] ICONST_ATTR_MPC_BITSREADER =
  82 {
  83     {0, 0, 1, 0, 3, 2, 1, 0, 7, 6, 5, 4, 3, 2, 1, 0, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0},
  84     {0, 0, 1, 2, 6, 1, 11, 4, 28, 19, 9, 62, 50, 37, 23, 8, 120, 103, 85, 66, 46, 25, 3, 236, 212, 187, 161, 134, 106, 77, 47, 16},
  85     {0, 0, 0, 0, 6, 12, 29, 8, 44, 8, 91, 36, 226, 148, 57, 464, 344, 208, 55, 908, 718, 508, 277, 24, 1796, 1496, 1171, 820, 442, 36, 3697, 3232},
  86     {0, 0, 0, 0, 3, 1, 29, 58, 2, 46, 182, 17, 309, 23, 683, 228, 1716, 1036, 220, 3347, 2207, 877, 7529, 5758, 3734, 1434, 15218, 12293, 9017, 5363, 1303, 29576},
  87     {0, 0, 0, 0, 0, 2, 11, 8, 2, 4, 50, 232, 761, 46, 1093, 3824, 2004, 7816, 4756, 880, 12419, 6434, 31887, 23032, 12406, 65292, 50342, 32792, 12317, 119638, 92233, 60768},
  88     {0, 0, 0, 0, 0, 0, 1, 4, 44, 46, 50, 100, 332, 1093, 3187, 184, 4008, 14204, 5636, 26776, 11272, 56459, 30125, 127548, 85044, 31914, 228278, 147548, 49268, 454801, 312295, 142384},
  89     {0, 0, 0, 0, 0, 0, 0, 0, 28, 8, 182, 232, 332, 664, 1757, 4944, 13320, 944, 15148, 53552, 14792, 91600, 16987, 178184, 43588, 390776, 160546, 913112, 536372, 61352, 1564729, 828448},
  90     {0, 0, 0, 0, 0, 0, 0, 0, 7, 19, 91, 17, 761, 1093, 1757, 3514, 8458, 21778, 55490, 5102, 58654, 204518, 33974, 313105, 1015577, 534877, 1974229, 1086199, 4096463, 2535683, 499883, 6258916},
  91     {0, 0, 0, 0, 0, 0, 0, 0, 0, 6, 9, 36, 309, 46, 3187, 4944, 8458, 16916, 38694, 94184, 230358, 26868, 231386, 789648, 54177, 1069754, 3701783, 1481708, 6762211, 2470066, 13394357, 5505632},
  92     {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 62, 226, 23, 1093, 184, 13320, 21778, 38694, 77388, 171572, 401930, 953086, 135896, 925544, 3076873, 8340931, 3654106, 13524422, 3509417, 22756699, 2596624},
  93     {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 50, 148, 683, 3824, 4008, 944, 55490, 94184, 171572, 343144, 745074, 1698160, 3931208, 662448, 3739321, 12080252, 32511574, 12481564, 49545413, 5193248},
  94     {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 37, 57, 228, 2004, 14204, 15148, 5102, 230358, 401930, 745074, 1490148, 3188308, 7119516, 16170572, 3132677, 15212929, 47724503, 127314931, 42642616},
  95     {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 23, 464, 1716, 7816, 5636, 53552, 58654, 26868, 953086, 1698160, 3188308, 6376616, 13496132, 29666704, 66353813, 14457878, 62182381, 189497312},
  96     {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 8, 344, 1036, 4756, 26776, 14792, 204518, 231386, 135896, 3931208, 7119516, 13496132, 26992264, 56658968, 123012781, 3252931, 65435312},
  97     {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 120, 208, 220, 880, 11272, 91600, 33974, 789648, 925544, 662448, 16170572, 29666704, 56658968, 113317936, 236330717, 508019104},
  98     {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 15, 103, 55, 3347, 12419, 56459, 16987, 313105, 54177, 3076873, 3739321, 3132677, 66353813, 123012781, 236330717}
  99 };
 100
 101 static const mpc_uint8_t log2[32] ICONST_ATTR_MPC_BITSREADER =
 102 { 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 6};
 103
 104 static const mpc_uint8_t log2_lost[32] ICONST_ATTR_MPC_BITSREADER =
 105 { 0, 1, 0, 3, 2, 1, 0, 7, 6, 5, 4, 3, 2, 1, 0, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, 31};
 106
 107 mpc_int32_t mpc_bits_golomb_dec(mpc_bits_reader * r, const mpc_uint_t k)
 108 {
 109     unsigned int l = 0;
 110     unsigned int code = r->buff[0] & ((1 << r->count) - 1);
 111
 112     while( code == 0 ) {
 113         l += r->count;
 114         r->buff++;
 115         code = r->buff[0];
 116         r->count = 8;
 117     }
 118
 119     while( ((1 << (r->count - 1)) & code) == 0 ) {
 120         l++;
 121         r->count--;
 122     }
 123     r->count--;
 124
 125     while( r->count < k ) {
 126         r->buff++;
 127         r->count += 8;
 128         code = (code << 8) | r->buff[0];
 129     }
 130
 131     r->count -= k;
 132
 133     return (l << k) | ((code >> r->count) & ((1 << k) - 1));
 134 }
 135
 136 mpc_uint32_t mpc_bits_log_dec(mpc_bits_reader * r, mpc_uint_t max)
 137 {
 138     mpc_uint32_t value = 0;
 139     if (log2[max - 1] > 1)
 140         value = mpc_bits_read(r, log2[max - 1] - 1);
 141     if (value >= log2_lost[max - 1])
 142         value = ((value << 1) | mpc_bits_read(r, 1)) - log2_lost[max - 1];
 143     return value;
 144 }
 145
 146 unsigned int mpc_bits_get_size(mpc_bits_reader * r, mpc_uint64_t * p_size)
 147 {
 148     unsigned char tmp;
 149     mpc_uint64_t size = 0;
 150     unsigned int ret = 0;
 151
 152     do {
 153         tmp = mpc_bits_read(r, 8);
 154         size = (size << 7) | (tmp & 0x7F);
 155         ret++;
 156     } while((tmp & 0x80));
 157
 158     *p_size = size;
 159     return ret;
 160 }
 161
 162 int mpc_bits_get_block(mpc_bits_reader * r, mpc_block * p_block)
 163 {
 164     int size = 2;
 165
 166     p_block->size = 0;
 167     p_block->key[0] = mpc_bits_read(r, 8);
 168     p_block->key[1] = mpc_bits_read(r, 8);
 169
 170     size += mpc_bits_get_size(r, &(p_block->size));
 171
 172     if (p_block->size >= (mpc_uint64_t)size) // check if the block size doesn't conflict with the header size
 173         p_block->size -= (mpc_uint64_t)size;
 174
 175     return size;
 176 }
 177
 178
 179