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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,27 @@ | ||
| CMAKE_MINIMUM_REQUIRED(VERSION 3.20) | ||
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| project(libmpcdec C) | ||
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| include(TestBigEndian) | ||
| TEST_BIG_ENDIAN(MPC_ENDIANNESS) | ||
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| add_definitions(-DFAST_MATH -DCVD_FASTLOG) | ||
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| if(NOT MSVC) | ||
| set(CMAKE_C_FLAGS "-O3 -Wall -fomit-frame-pointer -pipe") | ||
| endif(NOT MSVC) | ||
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| set(SOURCES | ||
| common/crc32.c | ||
| libmpcdec/huffman.c | ||
| libmpcdec/mpc_bits_reader.c | ||
| libmpcdec/mpc_decoder.c | ||
| libmpcdec/mpc_demux.c | ||
| libmpcdec/mpc_reader.c | ||
| libmpcdec/requant.c | ||
| libmpcdec/streaminfo.c | ||
| libmpcdec/synth_filter.c | ||
| ) | ||
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| add_library(mpcdec STATIC ${SOURCES}) | ||
| target_include_directories(mpcdec PUBLIC include) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| /* | ||
| * C Implementation: crc32 | ||
| * | ||
| * code from http://www.w3.org/TR/PNG/#D-CRCAppendix | ||
| * | ||
| */ | ||
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| /* Table of CRCs of all 8-bit messages. */ | ||
| static unsigned long crc_table[256]; | ||
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| /* Flag: has the table been computed? Initially false. */ | ||
| static int crc_table_computed = 0; | ||
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| /* Make the table for a fast CRC. */ | ||
| static void make_crc_table(void) | ||
| { | ||
| unsigned long c; | ||
| int n, k; | ||
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| for (n = 0; n < 256; n++) { | ||
| c = (unsigned long) n; | ||
| for (k = 0; k < 8; k++) { | ||
| if (c & 1) | ||
| c = 0xedb88320L ^ (c >> 1); | ||
| else | ||
| c = c >> 1; | ||
| } | ||
| crc_table[n] = c; | ||
| } | ||
| crc_table_computed = 1; | ||
| } | ||
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| /* Update a running CRC with the bytes buf[0..len-1]--the CRC | ||
| should be initialized to all 1's, and the transmitted value | ||
| is the 1's complement of the final running CRC (see the | ||
| crc() routine below). */ | ||
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| static unsigned long update_crc(unsigned long crc, unsigned char *buf, int len) | ||
| { | ||
| unsigned long c = crc; | ||
| int n; | ||
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| if (!crc_table_computed) | ||
| make_crc_table(); | ||
| for (n = 0; n < len; n++) { | ||
| c = crc_table[(c ^ buf[n]) & 0xff] ^ (c >> 8); | ||
| } | ||
| return c; | ||
| } | ||
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| /* Return the CRC of the bytes buf[0..len-1]. */ | ||
| unsigned long mpc_crc32(unsigned char *buf, int len) | ||
| { | ||
| return update_crc(0xffffffffL, buf, len) ^ 0xffffffffL; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,77 @@ | ||
| /* | ||
| * Musepack audio compression | ||
| * Copyright (C) 1999-2004 Buschmann/Klemm/Piecha/Wolf | ||
| * | ||
| * This library is free software; you can redistribute it and/or | ||
| * modify it under the terms of the GNU Lesser General Public | ||
| * License as published by the Free Software Foundation; either | ||
| * version 2.1 of the License, or (at your option) any later version. | ||
| * | ||
| * This library is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| * Lesser General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Lesser General Public | ||
| * License along with this library; if not, write to the Free Software | ||
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
| */ | ||
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| #include "mpc/mpcmath.h" | ||
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| #ifdef FAST_MATH | ||
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| const float tabatan2 [ 2*TABSTEP+1] [2]; | ||
| const float tabcos [26*TABSTEP+1] [2]; | ||
| const float tabsqrt_ex [256]; | ||
| const float tabsqrt_m [ TABSTEP+1] [2]; | ||
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|
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| void Init_FastMath ( void ) | ||
| { | ||
| int i; mpc_floatint X, Y; double xm, x0, xp, x, y; float* p; | ||
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| p = (float*) tabatan2; | ||
| for ( i = -TABSTEP; i <= TABSTEP; i++ ) { | ||
| xm = atan ((i-0.5)/TABSTEP); | ||
| x0 = atan ((i+0.0)/TABSTEP); | ||
| xp = atan ((i+0.5)/TABSTEP); | ||
| x = x0/2 + (xm + xp)/4; | ||
| y = xp - xm; | ||
| *p++ = x; | ||
| *p++ = y; | ||
| } | ||
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| p = (float*) tabcos; | ||
| for ( i = -13*TABSTEP; i <= 13*TABSTEP; i++ ) { | ||
| xm = cos ((i-0.5)/TABSTEP); | ||
| x0 = cos ((i+0.0)/TABSTEP); | ||
| xp = cos ((i+0.5)/TABSTEP); | ||
| x = x0/2 + (xm + xp)/4; | ||
| y = xp - xm; | ||
| *p++ = x; | ||
| *p++ = y; | ||
| } | ||
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| p = (float*) tabsqrt_ex; | ||
| for ( i = 0; i < 255; i++ ) { | ||
| X.n = (i << 23); | ||
| Y.n = (i << 23) + (1<<23) - 1; | ||
| *p++ = sqrt(X.f); | ||
| } | ||
| X.n = (255 << 23) - 1; | ||
| *p++ = sqrt(X.f); | ||
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| p = (float*) tabsqrt_m; | ||
| for ( i = 1*TABSTEP; i <= 2*TABSTEP; i++ ) { | ||
| xm = sqrt ((i-0.5)/TABSTEP); | ||
| x0 = sqrt ((i+0.0)/TABSTEP); | ||
| xp = sqrt ((i+0.5)/TABSTEP); | ||
| x = x0/2 + (xm + xp)/4; | ||
| y = xp - xm; | ||
| *p++ = x; | ||
| *p++ = y; | ||
| } | ||
| } | ||
|
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| #endif |
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