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bring the code up to the release tarball
git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@17026 d0543943-73ff-0310-b7d9-9358b9ac24b2
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@@ -1,193 +1,167 @@
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/***********************************************************************
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Copyright (c) 2006-2010, 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 "SKP_Silk_main.h"
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#include "SKP_Silk_PLC.h"
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/****************/
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/* Decode frame */
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/****************/
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SKP_int SKP_Silk_decode_frame(
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SKP_Silk_decoder_state *psDec, /* I/O Pointer to Silk decoder state */
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SKP_int16 pOut[], /* O Pointer to output speech frame */
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SKP_int16 *pN, /* O Pointer to size of output frame */
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const SKP_uint8 pCode[], /* I Pointer to payload */
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const SKP_int nBytes, /* I Payload length */
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SKP_int action, /* I Action from Jitter Buffer */
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SKP_int *decBytes /* O Used bytes to decode this frame */
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)
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{
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SKP_Silk_decoder_control sDecCtrl;
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SKP_int L, fs_Khz_old, LPC_order_old, ret = 0;
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SKP_int Pulses[ MAX_FRAME_LENGTH ];
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L = psDec->frame_length;
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sDecCtrl.LTP_scale_Q14 = 0;
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/* Safety checks */
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SKP_assert( L > 0 && L <= MAX_FRAME_LENGTH );
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/********************************************/
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/* Decode Frame if packet is not lost */
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/********************************************/
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*decBytes = 0;
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if( action == 0 ) {
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/********************************************/
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/* Initialize arithmetic coder */
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/********************************************/
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fs_Khz_old = psDec->fs_kHz;
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LPC_order_old = psDec->LPC_order;
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if( psDec->nFramesDecoded == 0 ) {
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/* Initialize range decoder state */
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SKP_Silk_range_dec_init( &psDec->sRC, pCode, nBytes );
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if( psDec->bitstream_v == BIT_STREAM_V4 ) {
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SKP_Silk_decode_indices_v4( psDec );
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}
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}
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/********************************************/
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/* Decode parameters and pulse signal */
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/********************************************/
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if( psDec->bitstream_v == BIT_STREAM_V4 ) {
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SKP_Silk_decode_parameters_v4( psDec, &sDecCtrl, Pulses, 1 );
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} else {
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SKP_Silk_decode_parameters( psDec, &sDecCtrl, Pulses, 1 );
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}
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if( psDec->sRC.error ) {
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psDec->nBytesLeft = 0;
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action = 1; /* PLC operation */
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psDec->fs_kHz = fs_Khz_old; /* revert fs if changed in decode_parameters */
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psDec->LPC_order = LPC_order_old; /* revert lpc_order if changed in decode_parameters */
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psDec->frame_length = fs_Khz_old * FRAME_LENGTH_MS;
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psDec->subfr_length = fs_Khz_old * FRAME_LENGTH_MS / NB_SUBFR;
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/* Avoid crashing */
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*decBytes = psDec->sRC.bufferLength;
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if( psDec->sRC.error == RANGE_CODER_DEC_PAYLOAD_TOO_LONG ) {
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ret = SKP_SILK_DEC_PAYLOAD_TOO_LARGE;
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} else {
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ret = SKP_SILK_DEC_PAYLOAD_ERROR;
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}
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} else {
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*decBytes = psDec->sRC.bufferLength - psDec->nBytesLeft;
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psDec->nFramesDecoded++;
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/* Update lengths. Sampling frequency could have changed */
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L = psDec->frame_length;
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/********************************************************/
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/* Run inverse NSQ */
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/********************************************************/
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SKP_Silk_decode_core( psDec, &sDecCtrl, pOut, Pulses );
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/********************************************************/
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/* Update PLC state */
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/********************************************************/
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SKP_Silk_PLC( psDec, &sDecCtrl, pOut, L, action );
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psDec->lossCnt = 0;
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psDec->prev_sigtype = sDecCtrl.sigtype;
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/* A frame has been decoded without errors */
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psDec->first_frame_after_reset = 0;
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}
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}
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/*************************************************************/
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/* Generate Concealment Frame if packet is lost, or corrupt */
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/*************************************************************/
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if( action == 1 ) {
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/* Handle packet loss by extrapolation */
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SKP_Silk_PLC( psDec, &sDecCtrl, pOut, L, action );
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psDec->lossCnt++;
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}
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/*************************/
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/* Update output buffer. */
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/*************************/
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SKP_memcpy( psDec->outBuf, pOut, L * sizeof( SKP_int16 ) );
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/****************************************************************/
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/* Ensure smooth connection of extrapolated and good frames */
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/****************************************************************/
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SKP_Silk_PLC_glue_frames( psDec, &sDecCtrl, pOut, L );
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/************************************************/
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/* Comfort noise generation / estimation */
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/************************************************/
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SKP_Silk_CNG( psDec, &sDecCtrl, pOut , L );
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/********************************************/
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/* HP filter output */
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/********************************************/
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SKP_assert( ( ( psDec->fs_kHz == 12 ) && ( L % 3 ) == 0 ) ||
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( ( psDec->fs_kHz != 12 ) && ( L % 2 ) == 0 ) );
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SKP_Silk_biquad( pOut, psDec->HP_B, psDec->HP_A, psDec->HPState, pOut, L );
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/********************************************/
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/* set output frame length */
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/********************************************/
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*pN = (SKP_int16)L;
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/* Update some decoder state variables */
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psDec->lagPrev = sDecCtrl.pitchL[ NB_SUBFR - 1 ];
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return ret;
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}
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/***********************************************************************
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Copyright (c) 2006-2010, 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 "SKP_Silk_main.h"
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#include "SKP_Silk_PLC.h"
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/****************/
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/* Decode frame */
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/****************/
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SKP_int SKP_Silk_decode_frame(
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SKP_Silk_decoder_state *psDec, /* I/O Pointer to Silk decoder state */
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SKP_int16 pOut[], /* O Pointer to output speech frame */
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SKP_int16 *pN, /* O Pointer to size of output frame */
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const SKP_uint8 pCode[], /* I Pointer to payload */
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const SKP_int nBytes, /* I Payload length */
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SKP_int action, /* I Action from Jitter Buffer */
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SKP_int *decBytes /* O Used bytes to decode this frame */
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)
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{
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SKP_Silk_decoder_control sDecCtrl;
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SKP_int L, fs_Khz_old, LPC_order_old, ret = 0;
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SKP_int Pulses[ MAX_FRAME_LENGTH ];
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L = psDec->frame_length;
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sDecCtrl.LTP_scale_Q14 = 0;
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/* Safety checks */
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SKP_assert( L > 0 && L <= MAX_FRAME_LENGTH );
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/********************************************/
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/* Decode Frame if packet is not lost */
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/********************************************/
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*decBytes = 0;
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if( action == 0 ) {
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/********************************************/
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/* Initialize arithmetic coder */
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/********************************************/
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fs_Khz_old = psDec->fs_kHz;
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LPC_order_old = psDec->LPC_order;
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if( psDec->nFramesDecoded == 0 ) {
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/* Initialize range decoder state */
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SKP_Silk_range_dec_init( &psDec->sRC, pCode, nBytes );
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if( psDec->bitstream_v == BIT_STREAM_V4 ) {
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SKP_Silk_decode_indices_v4( psDec );
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}
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}
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/********************************************/
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/* Decode parameters and pulse signal */
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/********************************************/
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if( psDec->bitstream_v == BIT_STREAM_V4 ) {
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SKP_Silk_decode_parameters_v4( psDec, &sDecCtrl, Pulses, 1 );
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} else {
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SKP_Silk_decode_parameters( psDec, &sDecCtrl, Pulses, 1 );
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}
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if( psDec->sRC.error ) {
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psDec->nBytesLeft = 0;
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action = 1; /* PLC operation */
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psDec->fs_kHz = fs_Khz_old; /* revert fs if changed in decode_parameters */
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psDec->LPC_order = LPC_order_old; /* revert lpc_order if changed in decode_parameters */
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psDec->frame_length = fs_Khz_old * FRAME_LENGTH_MS;
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psDec->subfr_length = fs_Khz_old * FRAME_LENGTH_MS / NB_SUBFR;
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/* Avoid crashing */
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*decBytes = psDec->sRC.bufferLength;
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if( psDec->sRC.error == RANGE_CODER_DEC_PAYLOAD_TOO_LONG ) {
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ret = SKP_SILK_DEC_PAYLOAD_TOO_LARGE;
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} else {
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ret = SKP_SILK_DEC_PAYLOAD_ERROR;
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}
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} else {
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*decBytes = psDec->sRC.bufferLength - psDec->nBytesLeft;
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psDec->nFramesDecoded++;
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/* Update lengths. Sampling frequency could have changed */
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L = psDec->frame_length;
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/********************************************************/
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/* Run inverse NSQ */
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/********************************************************/
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SKP_Silk_decode_core( psDec, &sDecCtrl, pOut, Pulses );
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/********************************************************/
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/* Update PLC state */
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/********************************************************/
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SKP_Silk_PLC( psDec, &sDecCtrl, pOut, L, action );
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psDec->lossCnt = 0;
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psDec->prev_sigtype = sDecCtrl.sigtype;
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/* A frame has been decoded without errors */
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psDec->first_frame_after_reset = 0;
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}
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}
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/*************************************************************/
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/* Generate Concealment Frame if packet is lost, or corrupt */
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/*************************************************************/
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if( action == 1 ) {
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/* Handle packet loss by extrapolation */
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SKP_Silk_PLC( psDec, &sDecCtrl, pOut, L, action );
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psDec->lossCnt++;
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}
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/*************************/
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/* Update output buffer. */
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/*************************/
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SKP_memcpy( psDec->outBuf, pOut, L * sizeof( SKP_int16 ) );
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/****************************************************************/
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/* Ensure smooth connection of extrapolated and good frames */
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/****************************************************************/
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SKP_Silk_PLC_glue_frames( psDec, &sDecCtrl, pOut, L );
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/************************************************/
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/* Comfort noise generation / estimation */
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/************************************************/
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SKP_Silk_CNG( psDec, &sDecCtrl, pOut , L );
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/********************************************/
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/* HP filter output */
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/********************************************/
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SKP_assert( ( ( psDec->fs_kHz == 12 ) && ( L % 3 ) == 0 ) ||
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( ( psDec->fs_kHz != 12 ) && ( L % 2 ) == 0 ) );
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SKP_Silk_biquad( pOut, psDec->HP_B, psDec->HP_A, psDec->HPState, pOut, L );
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/********************************************/
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/* set output frame length */
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/********************************************/
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*pN = ( SKP_int16 )L;
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/* Update some decoder state variables */
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psDec->lagPrev = sDecCtrl.pitchL[ NB_SUBFR - 1 ];
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return ret;
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}
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