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https://github.com/signalwire/freeswitch.git
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5bb9d2062e
git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@17026 d0543943-73ff-0310-b7d9-9358b9ac24b2
269 lines
13 KiB
C
269 lines
13 KiB
C
/***********************************************************************
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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_define.h"
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#include "SKP_Silk_main_FIX.h"
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#include "SKP_Silk_SDK_API.h"
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#include "SKP_Silk_control.h"
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#include "SKP_Silk_typedef.h"
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#include "SKP_Silk_structs.h"
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#define SKP_Silk_EncodeControlStruct SKP_SILK_SDK_EncControlStruct
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/****************************************/
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/* Encoder functions */
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/****************************************/
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SKP_int SKP_Silk_SDK_Get_Encoder_Size( SKP_int *encSizeBytes )
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{
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SKP_int ret = 0;
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*encSizeBytes = sizeof( SKP_Silk_encoder_state_FIX );
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return ret;
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}
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/***************************************/
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/* Read control structure from encoder */
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/***************************************/
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SKP_int SKP_Silk_SDK_QueryEncoder(
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const void *encState, /* I: State Vector */
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SKP_Silk_EncodeControlStruct *encStatus /* O: Control Structure */
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)
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{
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SKP_Silk_encoder_state_FIX *psEnc;
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SKP_int ret = 0;
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psEnc = ( SKP_Silk_encoder_state_FIX* )encState;
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encStatus->sampleRate = ( unsigned short )SKP_SMULBB( psEnc->sCmn.fs_kHz, 1000 ); /* convert kHz -> Hz */
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encStatus->packetSize = ( unsigned short )SKP_SMULBB( psEnc->sCmn.fs_kHz, psEnc->sCmn.PacketSize_ms ); /* convert samples -> ms */
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encStatus->bitRate = ( unsigned short )psEnc->sCmn.TargetRate_bps;
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encStatus->packetLossPercentage = psEnc->sCmn.PacketLoss_perc;
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encStatus->complexity = psEnc->sCmn.Complexity;
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return ret;
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}
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/*************************/
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/* Init or Reset encoder */
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/*************************/
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SKP_int SKP_Silk_SDK_InitEncoder(
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void *encState, /* I/O: State */
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SKP_Silk_EncodeControlStruct *encStatus /* O: Control structure */
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)
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{
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SKP_Silk_encoder_state_FIX *psEnc;
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SKP_int ret = 0;
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psEnc = ( SKP_Silk_encoder_state_FIX* )encState;
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/* Reset Encoder */
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if( ret += SKP_Silk_init_encoder_FIX( psEnc ) ) {
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SKP_assert( 0 );
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}
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/* Read Control structure */
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if( ret += SKP_Silk_SDK_QueryEncoder( encState, encStatus ) ) {
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SKP_assert( 0 );
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}
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return ret;
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}
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/**************************/
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/* Encode frame with Silk */
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/**************************/
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SKP_int SKP_Silk_SDK_Encode(
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void *encState, /* I/O: State */
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const SKP_Silk_EncodeControlStruct *encControl, /* I: Control structure */
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const SKP_int16 *samplesIn, /* I: Speech sample input vector */
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SKP_int nSamplesIn, /* I: Number of samples in input vector */
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SKP_uint8 *outData, /* O: Encoded output vector */
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SKP_int16 *nBytesOut /* I/O: Number of bytes in outData (input: Max bytes) */
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)
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{
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SKP_int API_fs_kHz, PacketSize_ms, PacketLoss_perc, UseInBandFec, UseDTX, ret = 0;
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SKP_int nSamplesToBuffer, Complexity, input_ms, nSamplesFromInput = 0;
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SKP_int32 TargetRate_bps;
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SKP_int16 MaxBytesOut;
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SKP_Silk_encoder_state_FIX *psEnc = ( SKP_Silk_encoder_state_FIX* )encState;
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SKP_assert( encControl != NULL );
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/* Check sampling frequency first, to avoid divide by zero later */
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if( ( encControl->sampleRate != 8000 ) && ( encControl->sampleRate != 12000 ) &&
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( encControl->sampleRate != 16000 ) && ( encControl->sampleRate != 24000 ) ) {
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ret = SKP_SILK_ENC_FS_NOT_SUPPORTED;
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SKP_assert( 0 );
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return( ret );
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}
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/* Set Encoder parameters from Control structure */
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API_fs_kHz = SKP_DIV32_16( ( SKP_int )encControl->sampleRate, 1000 ); /* convert Hz -> kHz */
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PacketSize_ms = SKP_DIV32_16( ( SKP_int )encControl->packetSize, API_fs_kHz ); /* convert samples -> ms */
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TargetRate_bps = ( SKP_int32 )encControl->bitRate;
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PacketLoss_perc = ( SKP_int )encControl->packetLossPercentage;
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UseInBandFec = ( SKP_int )encControl->useInBandFEC;
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Complexity = ( SKP_int )encControl->complexity;
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UseDTX = ( SKP_int )encControl->useDTX;
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/* Only accept input lengths that are multiplum of 10 ms */
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input_ms = SKP_DIV32_16( nSamplesIn, API_fs_kHz );
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if( ( input_ms % 10) != 0 || nSamplesIn < 0 ) {
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ret = SKP_SILK_ENC_INPUT_INVALID_NO_OF_SAMPLES;
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SKP_assert( 0 );
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return( ret );
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}
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/* Make sure no more than one packet can be produced */
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if( nSamplesIn > SKP_SMULBB( psEnc->sCmn.PacketSize_ms, API_fs_kHz ) ) {
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ret = SKP_SILK_ENC_INPUT_INVALID_NO_OF_SAMPLES;
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SKP_assert( 0 );
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return( ret );
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}
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if( ( ret = SKP_Silk_control_encoder_FIX( psEnc, API_fs_kHz, PacketSize_ms, TargetRate_bps,
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PacketLoss_perc, UseInBandFec, UseDTX, input_ms, Complexity ) ) != 0 ) {
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SKP_assert( 0 );
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return( ret );
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}
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/* Detect energy above 8 kHz */
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if( encControl->sampleRate == 24000 && psEnc->sCmn.sSWBdetect.SWB_detected == 0 && psEnc->sCmn.sSWBdetect.WB_detected == 0 ) {
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SKP_Silk_detect_SWB_input( &psEnc->sCmn.sSWBdetect, samplesIn, ( SKP_int )nSamplesIn );
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}
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/* Input buffering/resampling and encoding */
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MaxBytesOut = 0; /* return 0 output bytes if no encoder called */
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while( 1 ) {
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/* Resample/buffer */
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nSamplesToBuffer = psEnc->sCmn.frame_length - psEnc->sCmn.inputBufIx;
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if( encControl->sampleRate == SKP_SMULBB( psEnc->sCmn.fs_kHz, 1000 ) ) {
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/* Same sample frequency - copy the data */
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nSamplesToBuffer = SKP_min_int( nSamplesToBuffer, nSamplesIn );
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nSamplesFromInput = nSamplesToBuffer;
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SKP_memcpy( &psEnc->sCmn.inputBuf[ psEnc->sCmn.inputBufIx ], samplesIn, SKP_SMULBB( nSamplesToBuffer, sizeof( SKP_int16 ) ) );
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} else if( encControl->sampleRate == 24000 && psEnc->sCmn.fs_kHz == 16 ) {
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/* Resample the data from 24 kHz to 16 kHz */
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nSamplesToBuffer = SKP_min_int( nSamplesToBuffer, SKP_SMULWB( SKP_LSHIFT( nSamplesIn, 1 ), 21846 ) ); // 21846 = ceil(2/3)*2^15
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nSamplesFromInput = SKP_RSHIFT( SKP_SMULBB( nSamplesToBuffer, 3 ), 1 );
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#if LOW_COMPLEXITY_ONLY
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{
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SKP_int16 scratch[ MAX_FRAME_LENGTH + SigProc_Resample_2_3_coarse_NUM_FIR_COEFS - 1 ];
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SKP_assert( nSamplesFromInput <= MAX_FRAME_LENGTH );
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SKP_Silk_resample_2_3_coarse( &psEnc->sCmn.inputBuf[ psEnc->sCmn.inputBufIx ], psEnc->sCmn.resample24To16state,
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samplesIn, nSamplesFromInput, scratch );
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}
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#else
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SKP_Silk_resample_2_3( &psEnc->sCmn.inputBuf[ psEnc->sCmn.inputBufIx ], psEnc->sCmn.resample24To16state,
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samplesIn, nSamplesFromInput );
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#endif
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} else if( encControl->sampleRate == 24000 && psEnc->sCmn.fs_kHz == 12 ) {
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SKP_int32 scratch[ 3 * MAX_FRAME_LENGTH ];
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/* Resample the data from 24 kHz to 12 kHz */
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nSamplesToBuffer = SKP_min_int( nSamplesToBuffer, SKP_RSHIFT( nSamplesIn, 1 ) );
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nSamplesFromInput = SKP_LSHIFT16( nSamplesToBuffer, 1 );
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SKP_Silk_resample_1_2_coarse( samplesIn, psEnc->sCmn.resample24To12state,
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&psEnc->sCmn.inputBuf[ psEnc->sCmn.inputBufIx ], scratch, nSamplesToBuffer );
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} else if( encControl->sampleRate == 24000 && psEnc->sCmn.fs_kHz == 8 ) {
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/* Resample the data from 24 kHz to 8 kHz */
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nSamplesToBuffer = SKP_min_int( nSamplesToBuffer, SKP_DIV32_16( nSamplesIn, 3 ) );
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nSamplesFromInput = SKP_SMULBB( nSamplesToBuffer, 3 );
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SKP_Silk_resample_1_3( &psEnc->sCmn.inputBuf[ psEnc->sCmn.inputBufIx ], psEnc->sCmn.resample24To8state,
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samplesIn, nSamplesFromInput);
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} else if( encControl->sampleRate == 16000 && psEnc->sCmn.fs_kHz == 12 ) {
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/* Resample the data from 16 kHz to 12 kHz */
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nSamplesToBuffer = SKP_min_int( nSamplesToBuffer, SKP_RSHIFT( SKP_SMULBB( nSamplesIn, 3 ), 2 ) );
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nSamplesFromInput = SKP_SMULWB( SKP_LSHIFT16( nSamplesToBuffer, 2 ), 21846 ); // 21846 = ceil((1/3)*2^16)
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SKP_Silk_resample_3_4( &psEnc->sCmn.inputBuf[ psEnc->sCmn.inputBufIx ], psEnc->sCmn.resample16To12state,
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samplesIn, nSamplesFromInput );
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} else if( encControl->sampleRate == 16000 && psEnc->sCmn.fs_kHz == 8 ) {
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SKP_int32 scratch[ 3 * MAX_FRAME_LENGTH ];
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/* Resample the data from 16 kHz to 8 kHz */
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nSamplesToBuffer = SKP_min_int( nSamplesToBuffer, SKP_RSHIFT( nSamplesIn, 1 ) );
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nSamplesFromInput = SKP_LSHIFT16( nSamplesToBuffer, 1 );
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SKP_Silk_resample_1_2_coarse( samplesIn, psEnc->sCmn.resample16To8state,
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&psEnc->sCmn.inputBuf[ psEnc->sCmn.inputBufIx ], scratch, nSamplesToBuffer );
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} else if( encControl->sampleRate == 12000 && psEnc->sCmn.fs_kHz == 8 ) {
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/* Resample the data from 12 kHz to 8 kHz */
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nSamplesToBuffer = SKP_min_int( nSamplesToBuffer, SKP_SMULWB( SKP_LSHIFT( nSamplesIn, 1 ), 21846 ) );
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nSamplesFromInput = SKP_RSHIFT( SKP_SMULBB( nSamplesToBuffer, 3 ), 1 );
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#if LOW_COMPLEXITY_ONLY
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{
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SKP_int16 scratch[ MAX_FRAME_LENGTH + SigProc_Resample_2_3_coarse_NUM_FIR_COEFS - 1 ];
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SKP_assert( nSamplesFromInput <= MAX_FRAME_LENGTH );
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SKP_Silk_resample_2_3_coarse( &psEnc->sCmn.inputBuf[ psEnc->sCmn.inputBufIx ], psEnc->sCmn.resample12To8state,
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samplesIn, nSamplesFromInput, scratch );
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}
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#else
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SKP_Silk_resample_2_3( &psEnc->sCmn.inputBuf[ psEnc->sCmn.inputBufIx ], psEnc->sCmn.resample12To8state,
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samplesIn, nSamplesFromInput );
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#endif
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}
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samplesIn += nSamplesFromInput;
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nSamplesIn -= nSamplesFromInput;
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psEnc->sCmn.inputBufIx += nSamplesToBuffer;
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/* Silk encoder */
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if( psEnc->sCmn.inputBufIx >= psEnc->sCmn.frame_length ) {
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/* Enough data in input buffer, so encode */
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if( MaxBytesOut == 0 ) {
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/* No payload obtained so far */
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MaxBytesOut = *nBytesOut;
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if( ( ret = SKP_Silk_encode_frame_FIX( psEnc, outData, &MaxBytesOut, psEnc->sCmn.inputBuf ) ) != 0 ) {
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SKP_assert( 0 );
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}
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} else {
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/* outData already contains a payload */
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if( ( ret = SKP_Silk_encode_frame_FIX( psEnc, outData, nBytesOut, psEnc->sCmn.inputBuf ) ) != 0 ) {
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SKP_assert( 0 );
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}
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/* Check that no second payload was created */
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SKP_assert( *nBytesOut == 0 );
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}
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psEnc->sCmn.inputBufIx = 0;
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} else {
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break;
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}
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}
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*nBytesOut = MaxBytesOut;
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if( psEnc->sCmn.useDTX && psEnc->sCmn.inDTX ) {
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/* Dtx simulation */
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*nBytesOut = 0;
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}
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return ret;
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}
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