diff options
Diffstat (limited to 'thirdparty/opus/silk/HP_variable_cutoff.c')
| -rw-r--r-- | thirdparty/opus/silk/HP_variable_cutoff.c | 77 |
1 files changed, 0 insertions, 77 deletions
diff --git a/thirdparty/opus/silk/HP_variable_cutoff.c b/thirdparty/opus/silk/HP_variable_cutoff.c deleted file mode 100644 index bbe10f04ce..0000000000 --- a/thirdparty/opus/silk/HP_variable_cutoff.c +++ /dev/null @@ -1,77 +0,0 @@ -/*********************************************************************** -Copyright (c) 2006-2011, Skype Limited. All rights reserved. -Redistribution and use in source and binary forms, with or without -modification, are permitted provided that the following conditions -are met: -- Redistributions of source code must retain the above copyright notice, -this list of conditions and the following disclaimer. -- Redistributions in binary form must reproduce the above copyright -notice, this list of conditions and the following disclaimer in the -documentation and/or other materials provided with the distribution. -- Neither the name of Internet Society, IETF or IETF Trust, nor the -names of specific contributors, may be used to endorse or promote -products derived from this software without specific prior written -permission. -THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" -AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE -IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE -ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE -LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR -CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF -SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS -INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN -CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) -ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -POSSIBILITY OF SUCH DAMAGE. -***********************************************************************/ - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif -#ifdef FIXED_POINT -#include "main_FIX.h" -#else -#include "main_FLP.h" -#endif -#include "tuning_parameters.h" - -/* High-pass filter with cutoff frequency adaptation based on pitch lag statistics */ -void silk_HP_variable_cutoff( - silk_encoder_state_Fxx state_Fxx[] /* I/O Encoder states */ -) -{ - opus_int quality_Q15; - opus_int32 pitch_freq_Hz_Q16, pitch_freq_log_Q7, delta_freq_Q7; - silk_encoder_state *psEncC1 = &state_Fxx[ 0 ].sCmn; - - /* Adaptive cutoff frequency: estimate low end of pitch frequency range */ - if( psEncC1->prevSignalType == TYPE_VOICED ) { - /* difference, in log domain */ - pitch_freq_Hz_Q16 = silk_DIV32_16( silk_LSHIFT( silk_MUL( psEncC1->fs_kHz, 1000 ), 16 ), psEncC1->prevLag ); - pitch_freq_log_Q7 = silk_lin2log( pitch_freq_Hz_Q16 ) - ( 16 << 7 ); - - /* adjustment based on quality */ - quality_Q15 = psEncC1->input_quality_bands_Q15[ 0 ]; - pitch_freq_log_Q7 = silk_SMLAWB( pitch_freq_log_Q7, silk_SMULWB( silk_LSHIFT( -quality_Q15, 2 ), quality_Q15 ), - pitch_freq_log_Q7 - ( silk_lin2log( SILK_FIX_CONST( VARIABLE_HP_MIN_CUTOFF_HZ, 16 ) ) - ( 16 << 7 ) ) ); - - /* delta_freq = pitch_freq_log - psEnc->variable_HP_smth1; */ - delta_freq_Q7 = pitch_freq_log_Q7 - silk_RSHIFT( psEncC1->variable_HP_smth1_Q15, 8 ); - if( delta_freq_Q7 < 0 ) { - /* less smoothing for decreasing pitch frequency, to track something close to the minimum */ - delta_freq_Q7 = silk_MUL( delta_freq_Q7, 3 ); - } - - /* limit delta, to reduce impact of outliers in pitch estimation */ - delta_freq_Q7 = silk_LIMIT_32( delta_freq_Q7, -SILK_FIX_CONST( VARIABLE_HP_MAX_DELTA_FREQ, 7 ), SILK_FIX_CONST( VARIABLE_HP_MAX_DELTA_FREQ, 7 ) ); - - /* update smoother */ - psEncC1->variable_HP_smth1_Q15 = silk_SMLAWB( psEncC1->variable_HP_smth1_Q15, - silk_SMULBB( psEncC1->speech_activity_Q8, delta_freq_Q7 ), SILK_FIX_CONST( VARIABLE_HP_SMTH_COEF1, 16 ) ); - - /* limit frequency range */ - psEncC1->variable_HP_smth1_Q15 = silk_LIMIT_32( psEncC1->variable_HP_smth1_Q15, - silk_LSHIFT( silk_lin2log( VARIABLE_HP_MIN_CUTOFF_HZ ), 8 ), - silk_LSHIFT( silk_lin2log( VARIABLE_HP_MAX_CUTOFF_HZ ), 8 ) ); - } -} |