1885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/*********************************************************************** 2885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgCopyright (c) 2006-2011, Skype Limited. All rights reserved. 3885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgRedistribution and use in source and binary forms, with or without 4885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgmodification, are permitted provided that the following conditions 5885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgare met: 6885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org- Redistributions of source code must retain the above copyright notice, 7885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgthis list of conditions and the following disclaimer. 8885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org- Redistributions in binary form must reproduce the above copyright 9885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgnotice, this list of conditions and the following disclaimer in the 10885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgdocumentation and/or other materials provided with the distribution. 11e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.org- Neither the name of Internet Society, IETF or IETF Trust, nor the 12885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgnames of specific contributors, may be used to endorse or promote 13885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgproducts derived from this software without specific prior written 14885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgpermission. 15e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.orgTHIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 16885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgAND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgIMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 19885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgLIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgCONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgSUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgINTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgCONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgPOSSIBILITY OF SUCH DAMAGE. 26885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org***********************************************************************/ 27885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 28885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#ifdef HAVE_CONFIG_H 29885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#include "config.h" 30885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#endif 31885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#include "API.h" 32885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#include "main.h" 336b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org#include "stack_alloc.h" 34885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 35885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/************************/ 36885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/* Decoder Super Struct */ 37885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/************************/ 38885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgtypedef struct { 39885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_decoder_state channel_state[ DECODER_NUM_CHANNELS ]; 40885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org stereo_dec_state sStereo; 41885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int nChannelsAPI; 42885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int nChannelsInternal; 43885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int prev_decode_only_middle; 44885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org} silk_decoder; 45885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 46885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/*********************/ 47885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/* Decoder functions */ 48885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/*********************/ 49885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 50885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgopus_int silk_Get_Decoder_Size( /* O Returns error code */ 51885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int *decSizeBytes /* O Number of bytes in SILK decoder state */ 52885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org) 53885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org{ 54885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int ret = SILK_NO_ERROR; 55885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 56885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org *decSizeBytes = sizeof( silk_decoder ); 57885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 58885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org return ret; 59885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org} 60885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 61885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/* Reset decoder state */ 62885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgopus_int silk_InitDecoder( /* O Returns error code */ 63885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org void *decState /* I/O State */ 64885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org) 65885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org{ 66885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int n, ret = SILK_NO_ERROR; 67885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_decoder_state *channel_state = ((silk_decoder *)decState)->channel_state; 68885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 69885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( n = 0; n < DECODER_NUM_CHANNELS; n++ ) { 70885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org ret = silk_init_decoder( &channel_state[ n ] ); 71885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 72e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.org silk_memset(&((silk_decoder *)decState)->sStereo, 0, sizeof(((silk_decoder *)decState)->sStereo)); 73e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.org /* Not strictly needed, but it's cleaner that way */ 74e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.org ((silk_decoder *)decState)->prev_decode_only_middle = 0; 75885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 76885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org return ret; 77885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org} 78885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 79885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/* Decode a frame */ 80885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgopus_int silk_Decode( /* O Returns error code */ 81885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org void* decState, /* I/O State */ 82885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_DecControlStruct* decControl, /* I/O Control Structure */ 83885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int lostFlag, /* I 0: no loss, 1 loss, 2 decode fec */ 84885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int newPacketFlag, /* I Indicates first decoder call for this packet */ 85885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org ec_dec *psRangeDec, /* I/O Compressor data structure */ 86885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int16 *samplesOut, /* O Decoded output speech vector */ 87885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int32 *nSamplesOut /* O Number of samples decoded */ 88885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org) 89885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org{ 90885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int i, n, decode_only_middle = 0, ret = SILK_NO_ERROR; 91885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int32 nSamplesOutDec, LBRR_symbol; 926b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org opus_int16 *samplesOut1_tmp[ 2 ]; 936b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org VARDECL( opus_int16, samplesOut1_tmp_storage ); 946b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org VARDECL( opus_int16, samplesOut2_tmp ); 95885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int32 MS_pred_Q13[ 2 ] = { 0 }; 96885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int16 *resample_out_ptr; 97885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_decoder *psDec = ( silk_decoder * )decState; 98885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_decoder_state *channel_state = psDec->channel_state; 99885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int has_side; 100885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int stereo_to_mono; 1016b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org SAVE_STACK; 102885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 103e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.org silk_assert( decControl->nChannelsInternal == 1 || decControl->nChannelsInternal == 2 ); 104e3ea049fcaee2247e45f0ce793d4313babb4ef69tlegrand@chromium.org 105885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /**********************************/ 106885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Test if first frame in payload */ 107885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /**********************************/ 108885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( newPacketFlag ) { 109885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( n = 0; n < decControl->nChannelsInternal; n++ ) { 110885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org channel_state[ n ].nFramesDecoded = 0; /* Used to count frames in packet */ 111885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 112885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 113885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 114885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* If Mono -> Stereo transition in bitstream: init state of second channel */ 115885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( decControl->nChannelsInternal > psDec->nChannelsInternal ) { 116885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org ret += silk_init_decoder( &channel_state[ 1 ] ); 117885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 118885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 119885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org stereo_to_mono = decControl->nChannelsInternal == 1 && psDec->nChannelsInternal == 2 && 120885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org ( decControl->internalSampleRate == 1000*channel_state[ 0 ].fs_kHz ); 121885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 122885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( channel_state[ 0 ].nFramesDecoded == 0 ) { 123885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( n = 0; n < decControl->nChannelsInternal; n++ ) { 124885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int fs_kHz_dec; 125885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( decControl->payloadSize_ms == 0 ) { 126885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Assuming packet loss, use 10 ms */ 127885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org channel_state[ n ].nFramesPerPacket = 1; 128885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org channel_state[ n ].nb_subfr = 2; 129885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else if( decControl->payloadSize_ms == 10 ) { 130885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org channel_state[ n ].nFramesPerPacket = 1; 131885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org channel_state[ n ].nb_subfr = 2; 132885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else if( decControl->payloadSize_ms == 20 ) { 133885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org channel_state[ n ].nFramesPerPacket = 1; 134885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org channel_state[ n ].nb_subfr = 4; 135885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else if( decControl->payloadSize_ms == 40 ) { 136885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org channel_state[ n ].nFramesPerPacket = 2; 137885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org channel_state[ n ].nb_subfr = 4; 138885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else if( decControl->payloadSize_ms == 60 ) { 139885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org channel_state[ n ].nFramesPerPacket = 3; 140885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org channel_state[ n ].nb_subfr = 4; 141885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else { 142885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_assert( 0 ); 1436b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org RESTORE_STACK; 144885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org return SILK_DEC_INVALID_FRAME_SIZE; 145885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 146885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org fs_kHz_dec = ( decControl->internalSampleRate >> 10 ) + 1; 147885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( fs_kHz_dec != 8 && fs_kHz_dec != 12 && fs_kHz_dec != 16 ) { 148885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_assert( 0 ); 1496b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org RESTORE_STACK; 150885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org return SILK_DEC_INVALID_SAMPLING_FREQUENCY; 151885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 152885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org ret += silk_decoder_set_fs( &channel_state[ n ], fs_kHz_dec, decControl->API_sampleRate ); 153885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 154885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 155885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 156885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( decControl->nChannelsAPI == 2 && decControl->nChannelsInternal == 2 && ( psDec->nChannelsAPI == 1 || psDec->nChannelsInternal == 1 ) ) { 157885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_memset( psDec->sStereo.pred_prev_Q13, 0, sizeof( psDec->sStereo.pred_prev_Q13 ) ); 158885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_memset( psDec->sStereo.sSide, 0, sizeof( psDec->sStereo.sSide ) ); 159885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_memcpy( &channel_state[ 1 ].resampler_state, &channel_state[ 0 ].resampler_state, sizeof( silk_resampler_state_struct ) ); 160885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 161885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->nChannelsAPI = decControl->nChannelsAPI; 162885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->nChannelsInternal = decControl->nChannelsInternal; 163885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 164885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( decControl->API_sampleRate > (opus_int32)MAX_API_FS_KHZ * 1000 || decControl->API_sampleRate < 8000 ) { 165885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org ret = SILK_DEC_INVALID_SAMPLING_FREQUENCY; 1666b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org RESTORE_STACK; 167885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org return( ret ); 168885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 169885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 170885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( lostFlag != FLAG_PACKET_LOST && channel_state[ 0 ].nFramesDecoded == 0 ) { 171885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* First decoder call for this payload */ 172885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Decode VAD flags and LBRR flag */ 173885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( n = 0; n < decControl->nChannelsInternal; n++ ) { 174885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( i = 0; i < channel_state[ n ].nFramesPerPacket; i++ ) { 175885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org channel_state[ n ].VAD_flags[ i ] = ec_dec_bit_logp(psRangeDec, 1); 176885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 177885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org channel_state[ n ].LBRR_flag = ec_dec_bit_logp(psRangeDec, 1); 178885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 179885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Decode LBRR flags */ 180885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( n = 0; n < decControl->nChannelsInternal; n++ ) { 181885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_memset( channel_state[ n ].LBRR_flags, 0, sizeof( channel_state[ n ].LBRR_flags ) ); 182885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( channel_state[ n ].LBRR_flag ) { 183885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( channel_state[ n ].nFramesPerPacket == 1 ) { 184885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org channel_state[ n ].LBRR_flags[ 0 ] = 1; 185885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else { 186885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org LBRR_symbol = ec_dec_icdf( psRangeDec, silk_LBRR_flags_iCDF_ptr[ channel_state[ n ].nFramesPerPacket - 2 ], 8 ) + 1; 187885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( i = 0; i < channel_state[ n ].nFramesPerPacket; i++ ) { 188885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org channel_state[ n ].LBRR_flags[ i ] = silk_RSHIFT( LBRR_symbol, i ) & 1; 189885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 190885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 191885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 192885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 193885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 194885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( lostFlag == FLAG_DECODE_NORMAL ) { 195885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Regular decoding: skip all LBRR data */ 196885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( i = 0; i < channel_state[ 0 ].nFramesPerPacket; i++ ) { 197885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( n = 0; n < decControl->nChannelsInternal; n++ ) { 198885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( channel_state[ n ].LBRR_flags[ i ] ) { 199885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int pulses[ MAX_FRAME_LENGTH ]; 200885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int condCoding; 201885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 202885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( decControl->nChannelsInternal == 2 && n == 0 ) { 203885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_stereo_decode_pred( psRangeDec, MS_pred_Q13 ); 204885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( channel_state[ 1 ].LBRR_flags[ i ] == 0 ) { 205885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_stereo_decode_mid_only( psRangeDec, &decode_only_middle ); 206885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 207885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 208885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Use conditional coding if previous frame available */ 209885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( i > 0 && channel_state[ n ].LBRR_flags[ i - 1 ] ) { 210885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org condCoding = CODE_CONDITIONALLY; 211885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else { 212885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org condCoding = CODE_INDEPENDENTLY; 213885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 214885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_decode_indices( &channel_state[ n ], psRangeDec, i, 1, condCoding ); 215885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_decode_pulses( psRangeDec, pulses, channel_state[ n ].indices.signalType, 216885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org channel_state[ n ].indices.quantOffsetType, channel_state[ n ].frame_length ); 217885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 218885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 219885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 220885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 221885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 222885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 223885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Get MS predictor index */ 224885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( decControl->nChannelsInternal == 2 ) { 225885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( lostFlag == FLAG_DECODE_NORMAL || 226885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org ( lostFlag == FLAG_DECODE_LBRR && channel_state[ 0 ].LBRR_flags[ channel_state[ 0 ].nFramesDecoded ] == 1 ) ) 227885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org { 228885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_stereo_decode_pred( psRangeDec, MS_pred_Q13 ); 229885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* For LBRR data, decode mid-only flag only if side-channel's LBRR flag is false */ 230885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( ( lostFlag == FLAG_DECODE_NORMAL && channel_state[ 1 ].VAD_flags[ channel_state[ 0 ].nFramesDecoded ] == 0 ) || 231885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org ( lostFlag == FLAG_DECODE_LBRR && channel_state[ 1 ].LBRR_flags[ channel_state[ 0 ].nFramesDecoded ] == 0 ) ) 232885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org { 233885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_stereo_decode_mid_only( psRangeDec, &decode_only_middle ); 234885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else { 235885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org decode_only_middle = 0; 236885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 237885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else { 238885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( n = 0; n < 2; n++ ) { 239885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org MS_pred_Q13[ n ] = psDec->sStereo.pred_prev_Q13[ n ]; 240885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 241885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 242885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 243885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 244885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Reset side channel decoder prediction memory for first frame with side coding */ 245885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( decControl->nChannelsInternal == 2 && decode_only_middle == 0 && psDec->prev_decode_only_middle == 1 ) { 246885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_memset( psDec->channel_state[ 1 ].outBuf, 0, sizeof(psDec->channel_state[ 1 ].outBuf) ); 247885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_memset( psDec->channel_state[ 1 ].sLPC_Q14_buf, 0, sizeof(psDec->channel_state[ 1 ].sLPC_Q14_buf) ); 248885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->channel_state[ 1 ].lagPrev = 100; 249885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->channel_state[ 1 ].LastGainIndex = 10; 250885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->channel_state[ 1 ].prevSignalType = TYPE_NO_VOICE_ACTIVITY; 251885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->channel_state[ 1 ].first_frame_after_reset = 1; 252885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 253885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 2546b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org ALLOC( samplesOut1_tmp_storage, 2556b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org decControl->nChannelsInternal*( 2566b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org channel_state[ 0 ].frame_length + 2 ), 2576b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org opus_int16 ); 2586b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org samplesOut1_tmp[ 0 ] = samplesOut1_tmp_storage; 2596b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org samplesOut1_tmp[ 1 ] = samplesOut1_tmp_storage 2606b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org + channel_state[ 0 ].frame_length + 2; 2616b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org 262885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( lostFlag == FLAG_DECODE_NORMAL ) { 263885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org has_side = !decode_only_middle; 264885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else { 265885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org has_side = !psDec->prev_decode_only_middle 266885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org || (decControl->nChannelsInternal == 2 && lostFlag == FLAG_DECODE_LBRR && channel_state[1].LBRR_flags[ channel_state[1].nFramesDecoded ] == 1 ); 267885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 268885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Call decoder for one frame */ 269885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( n = 0; n < decControl->nChannelsInternal; n++ ) { 270885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( n == 0 || has_side ) { 271885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int FrameIndex; 272885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int condCoding; 273885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 274885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org FrameIndex = channel_state[ 0 ].nFramesDecoded - n; 275885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Use independent coding if no previous frame available */ 276885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( FrameIndex <= 0 ) { 277885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org condCoding = CODE_INDEPENDENTLY; 278885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else if( lostFlag == FLAG_DECODE_LBRR ) { 279885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org condCoding = channel_state[ n ].LBRR_flags[ FrameIndex - 1 ] ? CODE_CONDITIONALLY : CODE_INDEPENDENTLY; 280885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else if( n > 0 && psDec->prev_decode_only_middle ) { 281885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* If we skipped a side frame in this packet, we don't 282885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org need LTP scaling; the LTP state is well-defined. */ 283885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org condCoding = CODE_INDEPENDENTLY_NO_LTP_SCALING; 284885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else { 285885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org condCoding = CODE_CONDITIONALLY; 286885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 287885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org ret += silk_decode_frame( &channel_state[ n ], psRangeDec, &samplesOut1_tmp[ n ][ 2 ], &nSamplesOutDec, lostFlag, condCoding); 288885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else { 289885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_memset( &samplesOut1_tmp[ n ][ 2 ], 0, nSamplesOutDec * sizeof( opus_int16 ) ); 290885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 291885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org channel_state[ n ].nFramesDecoded++; 292885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 293885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 294885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( decControl->nChannelsAPI == 2 && decControl->nChannelsInternal == 2 ) { 295885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Convert Mid/Side to Left/Right */ 296885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_stereo_MS_to_LR( &psDec->sStereo, samplesOut1_tmp[ 0 ], samplesOut1_tmp[ 1 ], MS_pred_Q13, channel_state[ 0 ].fs_kHz, nSamplesOutDec ); 297885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else { 298885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Buffering */ 299885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_memcpy( samplesOut1_tmp[ 0 ], psDec->sStereo.sMid, 2 * sizeof( opus_int16 ) ); 300885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_memcpy( psDec->sStereo.sMid, &samplesOut1_tmp[ 0 ][ nSamplesOutDec ], 2 * sizeof( opus_int16 ) ); 301885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 302885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 303885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Number of output samples */ 304885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org *nSamplesOut = silk_DIV32( nSamplesOutDec * decControl->API_sampleRate, silk_SMULBB( channel_state[ 0 ].fs_kHz, 1000 ) ); 305885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 306885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Set up pointers to temp buffers */ 3076b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org ALLOC( samplesOut2_tmp, 3083c3902f0ac13428394f14f78f0fab05ef3468d69tlegrand@google.com decControl->nChannelsAPI == 2 ? *nSamplesOut : ALLOC_NONE, opus_int16 ); 309885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( decControl->nChannelsAPI == 2 ) { 310885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org resample_out_ptr = samplesOut2_tmp; 311885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else { 312885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org resample_out_ptr = samplesOut; 313885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 314885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 315885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( n = 0; n < silk_min( decControl->nChannelsAPI, decControl->nChannelsInternal ); n++ ) { 316885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 317885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Resample decoded signal to API_sampleRate */ 318885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org ret += silk_resampler( &channel_state[ n ].resampler_state, resample_out_ptr, &samplesOut1_tmp[ n ][ 1 ], nSamplesOutDec ); 319885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 320885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Interleave if stereo output and stereo stream */ 321885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( decControl->nChannelsAPI == 2 ) { 322885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( i = 0; i < *nSamplesOut; i++ ) { 323885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org samplesOut[ n + 2 * i ] = resample_out_ptr[ i ]; 324885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 325885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 326885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 327885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 328885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Create two channel output from mono stream */ 329885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( decControl->nChannelsAPI == 2 && decControl->nChannelsInternal == 1 ) { 330885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if ( stereo_to_mono ){ 331885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Resample right channel for newly collapsed stereo just in case 332885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org we weren't doing collapsing when switching to mono */ 333885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org ret += silk_resampler( &channel_state[ 1 ].resampler_state, resample_out_ptr, &samplesOut1_tmp[ 0 ][ 1 ], nSamplesOutDec ); 334885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 335885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( i = 0; i < *nSamplesOut; i++ ) { 336885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org samplesOut[ 1 + 2 * i ] = resample_out_ptr[ i ]; 337885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 338885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else { 339885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( i = 0; i < *nSamplesOut; i++ ) { 340885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org samplesOut[ 1 + 2 * i ] = samplesOut[ 0 + 2 * i ]; 341885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 342885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 343885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 344885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 345885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* Export pitch lag, measured at 48 kHz sampling rate */ 346885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( channel_state[ 0 ].prevSignalType == TYPE_VOICED ) { 347885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org int mult_tab[ 3 ] = { 6, 4, 3 }; 348885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org decControl->prevPitchLag = channel_state[ 0 ].lagPrev * mult_tab[ ( channel_state[ 0 ].fs_kHz - 8 ) >> 2 ]; 349885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else { 350885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org decControl->prevPitchLag = 0; 351885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 352885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 353885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( lostFlag == FLAG_PACKET_LOST ) { 354885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* On packet loss, remove the gain clamping to prevent having the energy "bounce back" 355885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if we lose packets when the energy is going down */ 356885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for ( i = 0; i < psDec->nChannelsInternal; i++ ) 357885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->channel_state[ i ].LastGainIndex = 10; 358885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } else { 359885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org psDec->prev_decode_only_middle = decode_only_middle; 360885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 3616b6bee25314cfac02cc555cddedb9680c63a26d6sergeyu@chromium.org RESTORE_STACK; 362885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org return ret; 363885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org} 364885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 365885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#if 0 366885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org/* Getting table of contents for a packet */ 367885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.orgopus_int silk_get_TOC( 368885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org const opus_uint8 *payload, /* I Payload data */ 369885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org const opus_int nBytesIn, /* I Number of input bytes */ 370885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org const opus_int nFramesPerPayload, /* I Number of SILK frames per payload */ 371885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_TOC_struct *Silk_TOC /* O Type of content */ 372885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org) 373885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org{ 374885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org opus_int i, flags, ret = SILK_NO_ERROR; 375885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 376885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( nBytesIn < 1 ) { 377885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org return -1; 378885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 379885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org if( nFramesPerPayload < 0 || nFramesPerPayload > 3 ) { 380885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org return -1; 381885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 382885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 383885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org silk_memset( Silk_TOC, 0, sizeof( *Silk_TOC ) ); 384885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 385885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org /* For stereo, extract the flags for the mid channel */ 386885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org flags = silk_RSHIFT( payload[ 0 ], 7 - nFramesPerPayload ) & ( silk_LSHIFT( 1, nFramesPerPayload + 1 ) - 1 ); 387885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 388885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org Silk_TOC->inbandFECFlag = flags & 1; 389885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org for( i = nFramesPerPayload - 1; i >= 0 ; i-- ) { 390885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org flags = silk_RSHIFT( flags, 1 ); 391885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org Silk_TOC->VADFlags[ i ] = flags & 1; 392885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org Silk_TOC->VADFlag |= flags & 1; 393885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org } 394885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org 395885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org return ret; 396885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org} 397885f2ff5a7a7d6a73432d26a6c0ae9147e6b452sergeyu@chromium.org#endif 398