sergeyu@chromium.org | 885f2ff | 2012-10-17 22:31:52 +0000 | [diff] [blame] | 1 | /*********************************************************************** |
| 2 | Copyright (c) 2006-2011, Skype Limited. All rights reserved. |
| 3 | Redistribution and use in source and binary forms, with or without |
| 4 | modification, are permitted provided that the following conditions |
| 5 | are met: |
| 6 | - Redistributions of source code must retain the above copyright notice, |
| 7 | this list of conditions and the following disclaimer. |
| 8 | - Redistributions in binary form must reproduce the above copyright |
| 9 | notice, this list of conditions and the following disclaimer in the |
| 10 | documentation and/or other materials provided with the distribution. |
tlegrand@chromium.org | e3ea049 | 2013-10-23 09:13:50 +0000 | [diff] [blame] | 11 | - Neither the name of Internet Society, IETF or IETF Trust, nor the |
sergeyu@chromium.org | 885f2ff | 2012-10-17 22:31:52 +0000 | [diff] [blame] | 12 | names of specific contributors, may be used to endorse or promote |
| 13 | products derived from this software without specific prior written |
| 14 | permission. |
tlegrand@chromium.org | e3ea049 | 2013-10-23 09:13:50 +0000 | [diff] [blame] | 15 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
sergeyu@chromium.org | 885f2ff | 2012-10-17 22:31:52 +0000 | [diff] [blame] | 16 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 17 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 18 | ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| 19 | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 20 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 21 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 22 | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 23 | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 24 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 25 | POSSIBILITY OF SUCH DAMAGE. |
| 26 | ***********************************************************************/ |
| 27 | |
| 28 | #ifdef HAVE_CONFIG_H |
| 29 | #include "config.h" |
| 30 | #endif |
| 31 | |
| 32 | #include "main_FIX.h" |
| 33 | |
| 34 | /* Calculation of LTP state scaling */ |
| 35 | void silk_LTP_scale_ctrl_FIX( |
| 36 | silk_encoder_state_FIX *psEnc, /* I/O encoder state */ |
| 37 | silk_encoder_control_FIX *psEncCtrl, /* I/O encoder control */ |
| 38 | opus_int condCoding /* I The type of conditional coding to use */ |
| 39 | ) |
| 40 | { |
| 41 | opus_int round_loss; |
| 42 | |
| 43 | if( condCoding == CODE_INDEPENDENTLY ) { |
| 44 | /* Only scale if first frame in packet */ |
| 45 | round_loss = psEnc->sCmn.PacketLoss_perc + psEnc->sCmn.nFramesPerPacket; |
| 46 | psEnc->sCmn.indices.LTP_scaleIndex = (opus_int8)silk_LIMIT( |
| 47 | silk_SMULWB( silk_SMULBB( round_loss, psEncCtrl->LTPredCodGain_Q7 ), SILK_FIX_CONST( 0.1, 9 ) ), 0, 2 ); |
| 48 | } else { |
| 49 | /* Default is minimum scaling */ |
| 50 | psEnc->sCmn.indices.LTP_scaleIndex = 0; |
| 51 | } |
| 52 | psEncCtrl->LTP_scale_Q14 = silk_LTPScales_table_Q14[ psEnc->sCmn.indices.LTP_scaleIndex ]; |
| 53 | } |