LCOV - code coverage report
Current view: top level - libavcodec - ttadata.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 11 11 100.0 %
Date: 2017-12-17 04:34:43 Functions: 2 2 100.0 %

          Line data    Source code
       1             : /*
       2             :  * TTA (The Lossless True Audio) data
       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             : #include "ttadata.h"
      22             : 
      23             : const uint32_t ff_tta_shift_1[] = {
      24             :     0x00000001, 0x00000002, 0x00000004, 0x00000008,
      25             :     0x00000010, 0x00000020, 0x00000040, 0x00000080,
      26             :     0x00000100, 0x00000200, 0x00000400, 0x00000800,
      27             :     0x00001000, 0x00002000, 0x00004000, 0x00008000,
      28             :     0x00010000, 0x00020000, 0x00040000, 0x00080000,
      29             :     0x00100000, 0x00200000, 0x00400000, 0x00800000,
      30             :     0x01000000, 0x02000000, 0x04000000, 0x08000000,
      31             :     0x10000000, 0x20000000, 0x40000000, 0x80000000,
      32             :     0x80000000, 0x80000000, 0x80000000, 0x80000000,
      33             :     0x80000000, 0x80000000, 0x80000000, 0x80000000
      34             : };
      35             : 
      36             : const uint32_t * const ff_tta_shift_16 = ff_tta_shift_1 + 4;
      37             : 
      38             : const uint8_t ff_tta_filter_configs[] = { 10, 9, 10, 12 };
      39             : 
      40          68 : void ff_tta_rice_init(TTARice *c, uint32_t k0, uint32_t k1)
      41             : {
      42          68 :     c->k0 = k0;
      43          68 :     c->k1 = k1;
      44          68 :     c->sum0 = ff_tta_shift_16[k0];
      45          68 :     c->sum1 = ff_tta_shift_16[k1];
      46          68 : }
      47             : 
      48          68 : void ff_tta_filter_init(TTAFilter *c, int32_t shift) {
      49          68 :     memset(c, 0, sizeof(TTAFilter));
      50          68 :     c->shift = shift;
      51          68 :     c->round = ff_tta_shift_1[shift-1];
      52          68 : }

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