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authorJean-Marc Valin <jmvalin@jmvalin.ca>2011-09-16 12:16:53 +0400
committerJean-Marc Valin <jmvalin@jmvalin.ca>2011-09-16 12:16:53 +0400
commit1c2f5633d101c08b5ef8095a8682d3d52cbd952d (patch)
tree66f80e67f075db5fa5233759a89f475d8bedade2 /silk/decode_frame.c
parentfb3a437c9dabb4aafe4a3927158161590ed745ab (diff)
Removed all the silk_ prefixes in source file names (not symbols)
Diffstat (limited to 'silk/decode_frame.c')
-rw-r--r--silk/decode_frame.c137
1 files changed, 137 insertions, 0 deletions
diff --git a/silk/decode_frame.c b/silk/decode_frame.c
new file mode 100644
index 00000000..d70dccb1
--- /dev/null
+++ b/silk/decode_frame.c
@@ -0,0 +1,137 @@
+/***********************************************************************
+Copyright (c) 2006-2011, Skype Limited. All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, (subject to the limitations in the disclaimer below)
+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 Skype Limited, nor the names of specific
+contributors, may be used to endorse or promote products derived from
+this software without specific prior written permission.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
+BY THIS LICENSE. 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
+
+#include "main.h"
+#include "PLC.h"
+
+/****************/
+/* Decode frame */
+/****************/
+opus_int silk_decode_frame(
+ silk_decoder_state *psDec, /* I/O Pointer to Silk decoder state */
+ ec_dec *psRangeDec, /* I/O Compressor data structure */
+ opus_int16 pOut[], /* O Pointer to output speech frame */
+ opus_int32 *pN, /* O Pointer to size of output frame */
+ opus_int lostFlag /* I 0: no loss, 1 loss, 2 decode fec */
+)
+{
+ silk_decoder_control sDecCtrl;
+ opus_int L, mv_len, ret = 0;
+ opus_int pulses[ MAX_FRAME_LENGTH ];
+
+TIC(DECODE_FRAME)
+
+ L = psDec->frame_length;
+ sDecCtrl.LTP_scale_Q14 = 0;
+
+ /* Safety checks */
+ silk_assert( L > 0 && L <= MAX_FRAME_LENGTH );
+
+ if( lostFlag == FLAG_DECODE_NORMAL ||
+ ( lostFlag == FLAG_DECODE_LBRR && psDec->LBRR_flags[ psDec->nFramesDecoded ] == 1 ) )
+ {
+ /*********************************************/
+ /* Decode quantization indices of side info */
+ /*********************************************/
+TIC(decode_indices)
+ silk_decode_indices( psDec, psRangeDec, psDec->nFramesDecoded, lostFlag );
+TOC(decode_indices)
+
+ /*********************************************/
+ /* Decode quantization indices of excitation */
+ /*********************************************/
+TIC(decode_pulses)
+ silk_decode_pulses( psRangeDec, pulses, psDec->indices.signalType,
+ psDec->indices.quantOffsetType, psDec->frame_length );
+TOC(decode_pulses)
+
+ /********************************************/
+ /* Decode parameters and pulse signal */
+ /********************************************/
+TIC(decode_params)
+ silk_decode_parameters( psDec, &sDecCtrl );
+TOC(decode_params)
+
+ /* Update length. Sampling frequency may have changed */
+ L = psDec->frame_length;
+
+ /********************************************************/
+ /* Run inverse NSQ */
+ /********************************************************/
+TIC(decode_core)
+ silk_decode_core( psDec, &sDecCtrl, pOut, pulses );
+TOC(decode_core)
+
+ /********************************************************/
+ /* Update PLC state */
+ /********************************************************/
+ silk_PLC( psDec, &sDecCtrl, pOut, L, 0 );
+
+ psDec->lossCnt = 0;
+ psDec->prevSignalType = psDec->indices.signalType;
+ silk_assert( psDec->prevSignalType >= 0 && psDec->prevSignalType <= 2 );
+
+ /* A frame has been decoded without errors */
+ psDec->first_frame_after_reset = 0;
+ } else {
+ /* Handle packet loss by extrapolation */
+ silk_PLC( psDec, &sDecCtrl, pOut, L, 1 );
+ }
+
+ /*************************/
+ /* Update output buffer. */
+ /*************************/
+ silk_assert( psDec->ltp_mem_length >= psDec->frame_length );
+ mv_len = psDec->ltp_mem_length - psDec->frame_length;
+ silk_memmove( psDec->outBuf, &psDec->outBuf[ psDec->frame_length ], mv_len * sizeof(opus_int16) );
+ silk_memcpy( &psDec->outBuf[ mv_len ], pOut, psDec->frame_length * sizeof( opus_int16 ) );
+
+ /****************************************************************/
+ /* Ensure smooth connection of extrapolated and good frames */
+ /****************************************************************/
+ silk_PLC_glue_frames( psDec, &sDecCtrl, pOut, L );
+
+ /************************************************/
+ /* Comfort noise generation / estimation */
+ /************************************************/
+ silk_CNG( psDec, &sDecCtrl, pOut, L );
+
+ /* Update some decoder state variables */
+ psDec->lagPrev = sDecCtrl.pitchL[ psDec->nb_subfr - 1 ];
+ psDec->nFramesDecoded++;
+
+ /* Set output frame length */
+ *pN = L;
+
+TOC(DECODE_FRAME)
+
+ return ret;
+}