Joonas Rikkonen
105 lines
4.0 KiB
C#
105 lines
4.0 KiB
C#
/* Copyright (c) 2006-2011 Skype Limited. All Rights Reserved
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Ported to C# by Logan Stromberg
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright
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notice, 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 Internet Society, IETF or IETF Trust, nor the
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names of specific contributors, may be used to endorse or promote
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products derived from this software without specific prior written
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permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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namespace Concentus.Silk.Structs
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{
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using Concentus.Common;
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using Concentus.Common.CPlusPlus;
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using Concentus.Silk.Enums;
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/// <summary>
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/// Encoder Super Struct
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/// </summary>
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internal class SilkEncoder
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{
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internal readonly SilkChannelEncoder[] state_Fxx = new SilkChannelEncoder[SilkConstants.ENCODER_NUM_CHANNELS];
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internal readonly StereoEncodeState sStereo = new StereoEncodeState();
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internal int nBitsUsedLBRR = 0;
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internal int nBitsExceeded = 0;
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internal int nChannelsAPI = 0;
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internal int nChannelsInternal = 0;
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internal int nPrevChannelsInternal = 0;
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internal int timeSinceSwitchAllowed_ms = 0;
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internal int allowBandwidthSwitch = 0;
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internal int prev_decode_only_middle = 0;
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internal SilkEncoder()
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{
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for (int c = 0; c < SilkConstants.ENCODER_NUM_CHANNELS; c++)
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{
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state_Fxx[c] = new SilkChannelEncoder();
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}
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}
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internal void Reset()
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{
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for (int c = 0; c < SilkConstants.ENCODER_NUM_CHANNELS; c++)
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{
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state_Fxx[c].Reset();
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}
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sStereo.Reset();
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nBitsUsedLBRR = 0;
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nBitsExceeded = 0;
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nChannelsAPI = 0;
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nChannelsInternal = 0;
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nPrevChannelsInternal = 0;
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timeSinceSwitchAllowed_ms = 0;
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allowBandwidthSwitch = 0;
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prev_decode_only_middle = 0;
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}
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/// <summary>
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/// Initialize Silk Encoder state
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/// </summary>
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/// <param name="psEnc">I/O Pointer to Silk FIX encoder state</param>
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/// <returns></returns>
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internal static int silk_init_encoder(SilkChannelEncoder psEnc)
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{
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int ret = 0;
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// Clear the entire encoder state
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psEnc.Reset();
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psEnc.variable_HP_smth1_Q15 = Inlines.silk_LSHIFT(Inlines.silk_lin2log(((int)((TuningParameters.VARIABLE_HP_MIN_CUTOFF_HZ) * ((long)1 << (16)) + 0.5))/*Inlines.SILK_CONST(TuningParameters.VARIABLE_HP_MIN_CUTOFF_HZ, 16)*/) - (16 << 7), 8);
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psEnc.variable_HP_smth2_Q15 = psEnc.variable_HP_smth1_Q15;
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// Used to deactivate LSF interpolation, pitch prediction
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psEnc.first_frame_after_reset = 1;
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// Initialize Silk VAD
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ret += VoiceActivityDetection.silk_VAD_Init(psEnc.sVAD);
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return ret;
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}
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}
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} |