1cabdff1aSopenharmony_ci/* 2cabdff1aSopenharmony_ci * TTA (The Lossless True Audio) data 3cabdff1aSopenharmony_ci * 4cabdff1aSopenharmony_ci * This file is part of FFmpeg. 5cabdff1aSopenharmony_ci * 6cabdff1aSopenharmony_ci * FFmpeg is free software; you can redistribute it and/or 7cabdff1aSopenharmony_ci * modify it under the terms of the GNU Lesser General Public 8cabdff1aSopenharmony_ci * License as published by the Free Software Foundation; either 9cabdff1aSopenharmony_ci * version 2.1 of the License, or (at your option) any later version. 10cabdff1aSopenharmony_ci * 11cabdff1aSopenharmony_ci * FFmpeg is distributed in the hope that it will be useful, 12cabdff1aSopenharmony_ci * but WITHOUT ANY WARRANTY; without even the implied warranty of 13cabdff1aSopenharmony_ci * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14cabdff1aSopenharmony_ci * Lesser General Public License for more details. 15cabdff1aSopenharmony_ci * 16cabdff1aSopenharmony_ci * You should have received a copy of the GNU Lesser General Public 17cabdff1aSopenharmony_ci * License along with FFmpeg; if not, write to the Free Software 18cabdff1aSopenharmony_ci * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19cabdff1aSopenharmony_ci */ 20cabdff1aSopenharmony_ci 21cabdff1aSopenharmony_ci#include <string.h> 22cabdff1aSopenharmony_ci#include "ttadata.h" 23cabdff1aSopenharmony_ci 24cabdff1aSopenharmony_ciconst uint32_t ff_tta_shift_1[] = { 25cabdff1aSopenharmony_ci 0x00000001, 0x00000002, 0x00000004, 0x00000008, 26cabdff1aSopenharmony_ci 0x00000010, 0x00000020, 0x00000040, 0x00000080, 27cabdff1aSopenharmony_ci 0x00000100, 0x00000200, 0x00000400, 0x00000800, 28cabdff1aSopenharmony_ci 0x00001000, 0x00002000, 0x00004000, 0x00008000, 29cabdff1aSopenharmony_ci 0x00010000, 0x00020000, 0x00040000, 0x00080000, 30cabdff1aSopenharmony_ci 0x00100000, 0x00200000, 0x00400000, 0x00800000, 31cabdff1aSopenharmony_ci 0x01000000, 0x02000000, 0x04000000, 0x08000000, 32cabdff1aSopenharmony_ci 0x10000000, 0x20000000, 0x40000000, 0x80000000, 33cabdff1aSopenharmony_ci 0x80000000, 0x80000000, 0x80000000, 0x80000000, 34cabdff1aSopenharmony_ci 0x80000000, 0x80000000, 0x80000000, 0x80000000, 35cabdff1aSopenharmony_ci 0xFFFFFFFF 36cabdff1aSopenharmony_ci}; 37cabdff1aSopenharmony_ci 38cabdff1aSopenharmony_ciconst uint32_t * const ff_tta_shift_16 = ff_tta_shift_1 + 4; 39cabdff1aSopenharmony_ci 40cabdff1aSopenharmony_ciconst uint8_t ff_tta_filter_configs[] = { 10, 9, 10, 12 }; 41cabdff1aSopenharmony_ci 42cabdff1aSopenharmony_civoid ff_tta_rice_init(TTARice *c, uint32_t k0, uint32_t k1) 43cabdff1aSopenharmony_ci{ 44cabdff1aSopenharmony_ci c->k0 = k0; 45cabdff1aSopenharmony_ci c->k1 = k1; 46cabdff1aSopenharmony_ci c->sum0 = ff_tta_shift_16[k0]; 47cabdff1aSopenharmony_ci c->sum1 = ff_tta_shift_16[k1]; 48cabdff1aSopenharmony_ci} 49cabdff1aSopenharmony_ci 50cabdff1aSopenharmony_civoid ff_tta_filter_init(TTAFilter *c, int32_t shift) { 51cabdff1aSopenharmony_ci memset(c, 0, sizeof(TTAFilter)); 52cabdff1aSopenharmony_ci c->shift = shift; 53cabdff1aSopenharmony_ci c->round = ff_tta_shift_1[shift-1]; 54cabdff1aSopenharmony_ci} 55