LCOV - code coverage report
Current view: top level - libavcodec - g722dsp.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 30 30 100.0 %
Date: 2017-12-15 11:05:35 Functions: 2 2 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2015 Peter Meerwald <pmeerw@pmeerw.net>
       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 "g722dsp.h"
      22             : #include "mathops.h"
      23             : 
      24             : /*
      25             :  * quadrature mirror filter (QMF) coefficients (ITU-T G.722 Table 11) inlined
      26             :  * in code below: 3, -11, 12, 32, -210, 951, 3876, -805, 362, -156, 53, -11
      27             :  */
      28             : 
      29      269326 : static void g722_apply_qmf(const int16_t *prev_samples, int xout[2])
      30             : {
      31      269326 :     xout[1] = MUL16(*prev_samples++, 3);
      32      269326 :     xout[0] = MUL16(*prev_samples++, -11);
      33             : 
      34      269326 :     MAC16(xout[1], *prev_samples++, -11);
      35      269326 :     MAC16(xout[0], *prev_samples++, 53);
      36             : 
      37      269326 :     MAC16(xout[1], *prev_samples++, 12);
      38      269326 :     MAC16(xout[0], *prev_samples++, -156);
      39             : 
      40      269326 :     MAC16(xout[1], *prev_samples++, 32);
      41      269326 :     MAC16(xout[0], *prev_samples++, 362);
      42             : 
      43      269326 :     MAC16(xout[1], *prev_samples++, -210);
      44      269326 :     MAC16(xout[0], *prev_samples++, -805);
      45             : 
      46      269326 :     MAC16(xout[1], *prev_samples++, 951);
      47      269326 :     MAC16(xout[0], *prev_samples++, 3876);
      48             : 
      49      269326 :     MAC16(xout[1], *prev_samples++, 3876);
      50      269326 :     MAC16(xout[0], *prev_samples++, 951);
      51             : 
      52      269326 :     MAC16(xout[1], *prev_samples++, -805);
      53      269326 :     MAC16(xout[0], *prev_samples++, -210);
      54             : 
      55      269326 :     MAC16(xout[1], *prev_samples++, 362);
      56      269326 :     MAC16(xout[0], *prev_samples++, 32);
      57             : 
      58      269326 :     MAC16(xout[1], *prev_samples++, -156);
      59      269326 :     MAC16(xout[0], *prev_samples++, 12);
      60             : 
      61      269326 :     MAC16(xout[1], *prev_samples++, 53);
      62      269326 :     MAC16(xout[0], *prev_samples++, -11);
      63             : 
      64      269326 :     MAC16(xout[1], *prev_samples++, -11);
      65      269326 :     MAC16(xout[0], *prev_samples++, 3);
      66      269326 : }
      67             : 
      68          18 : av_cold void ff_g722dsp_init(G722DSPContext *c)
      69             : {
      70          18 :     c->apply_qmf = g722_apply_qmf;
      71             : 
      72             :     if (ARCH_ARM)
      73             :         ff_g722dsp_init_arm(c);
      74             :     if (ARCH_X86)
      75          18 :         ff_g722dsp_init_x86(c);
      76          18 : }

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