103302b375
commit 5b64cf7c4d67af9050bc959996ef976ce6326888
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date: Thu May 19 16:40:35 2011 -0400
Fixes a few bugs introduced in the latest update
commit b91eb86025d2de3c4cf04f4fb1aa48a28ad676a3
Author: Timothy B. Terriberry <tterribe@xiph.org>
Date: Thu May 19 16:12:02 2011 -0400
build_draft.sh fixes
commit 0b10c30db7ad60ff7d4bfc1139bdb86e0543c035
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date: Thu May 19 15:30:21 2011 -0400
Fixes the draft build
commit 164424cded5978e657105104e171ac202dde5e5b
Author: Jean-Marc Valin <jean-marc.valin@octasic.com>
Date: Thu May 19 15:00:23 2011 -0400
Updated build system
commit 188d9fcba8c3a1b1ad67c67c430e1b37e3658a40
Author: Koen Vos <koen.vos@skype.net>
Date: Thu May 19 17:14:57 2011 -0400
SILK/Opus update
77 lines
3.8 KiB
C
77 lines
3.8 KiB
C
/***********************************************************************
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Copyright (c) 2006-2011, Skype Limited. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, (subject to the limitations in the disclaimer below)
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are permitted provided that the following conditions are met:
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- Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name of Skype Limited, nor the names of specific
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contributors, may be used to endorse or promote products derived from
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this software without specific prior written permission.
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NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
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BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
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BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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***********************************************************************/
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#include "silk_main.h"
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#include "silk_tuning_parameters.h"
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/* Control SNR of redidual quantizer */
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SKP_int silk_control_SNR(
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silk_encoder_state *psEncC, /* I/O Pointer to Silk encoder state */
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SKP_int32 TargetRate_bps /* I Target max bitrate (bps) */
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)
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{
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SKP_int k, ret = SILK_NO_ERROR;
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SKP_int32 frac_Q6;
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const SKP_int32 *rateTable;
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/* Set bitrate/coding quality */
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TargetRate_bps = SKP_LIMIT( TargetRate_bps, MIN_TARGET_RATE_BPS, MAX_TARGET_RATE_BPS );
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if( TargetRate_bps != psEncC->TargetRate_bps ) {
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psEncC->TargetRate_bps = TargetRate_bps;
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/* If new TargetRate_bps, translate to SNR_dB value */
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if( psEncC->fs_kHz == 8 ) {
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rateTable = silk_TargetRate_table_NB;
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} else if( psEncC->fs_kHz == 12 ) {
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rateTable = silk_TargetRate_table_MB;
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} else {
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rateTable = silk_TargetRate_table_WB;
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}
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/* Reduce bitrate for 10 ms modes in these calculations */
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if( psEncC->nb_subfr == 2 ) {
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TargetRate_bps -= REDUCE_BITRATE_10_MS_BPS;
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}
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/* Find bitrate interval in table and interpolate */
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for( k = 1; k < TARGET_RATE_TAB_SZ; k++ ) {
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if( TargetRate_bps <= rateTable[ k ] ) {
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frac_Q6 = SKP_DIV32( SKP_LSHIFT( TargetRate_bps - rateTable[ k - 1 ], 6 ),
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rateTable[ k ] - rateTable[ k - 1 ] );
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psEncC->SNR_dB_Q7 = SKP_LSHIFT( silk_SNR_table_Q1[ k - 1 ], 6 ) + SKP_MUL( frac_Q6, silk_SNR_table_Q1[ k ] - silk_SNR_table_Q1[ k - 1 ] );
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break;
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}
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}
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/* Reduce coding quality whenever LBRR is enabled, to free up some bits */
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if( psEncC->LBRR_enabled ) {
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psEncC->SNR_dB_Q7 = SKP_SMLABB( psEncC->SNR_dB_Q7, 12 - psEncC->LBRR_GainIncreases, SILK_FIX_CONST( -0.25, 7 ) );
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}
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}
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return ret;
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}
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