/// <summary>
/// Read control structure from encode
/// </summary>
/// <param name="encState">I State</param>
/// <param name="encStatus">O Encoder Status</param>
/// <returns>Returns error code</returns>
internal static int silk_QueryEncoder(SilkEncoder encState, EncControlState encStatus)
{
int ret = SilkError.SILK_NO_ERROR;
SilkChannelEncoder state_Fxx = encState.state_Fxx[0];
encStatus.Reset();
encStatus.nChannelsAPI = encState.nChannelsAPI;
encStatus.nChannelsInternal = encState.nChannelsInternal;
encStatus.API_sampleRate = state_Fxx.API_fs_Hz;
encStatus.maxInternalSampleRate = state_Fxx.maxInternal_fs_Hz;
encStatus.minInternalSampleRate = state_Fxx.minInternal_fs_Hz;
encStatus.desiredInternalSampleRate = state_Fxx.desiredInternal_fs_Hz;
encStatus.payloadSize_ms = state_Fxx.PacketSize_ms;
encStatus.bitRate = state_Fxx.TargetRate_bps;
encStatus.packetLossPercentage = state_Fxx.PacketLoss_perc;
encStatus.complexity = state_Fxx.Complexity;
encStatus.useInBandFEC = state_Fxx.useInBandFEC;
encStatus.useDTX = state_Fxx.useDTX;
encStatus.useCBR = state_Fxx.useCBR;
encStatus.internalSampleRate = Inlines.silk_SMULBB(state_Fxx.fs_kHz, 1000);
encStatus.allowBandwidthSwitch = state_Fxx.allow_bandwidth_switch;
encStatus.inWBmodeWithoutVariableLP = (state_Fxx.fs_kHz == 16 && state_Fxx.sLP.mode == 0) ? 1 : 0;
return(ret);
}
/// <summary>
/// Init or Reset encoder
/// </summary>
/// <param name="encState">I/O State</param>
/// <param name="arch">I Run-time architecture</param>
/// <param name="encStatus">O Encoder Status</param>
/// <returns>O Returns error code</returns>
internal static int silk_InitEncoder(SilkEncoder encState, EncControlState encStatus)
{
int ret = SilkError.SILK_NO_ERROR;
/* Reset encoder */
encState.Reset();
for (int n = 0; n < SilkConstants.ENCODER_NUM_CHANNELS; n++)
{
ret += SilkEncoder.silk_init_encoder(encState.state_Fxx[n]);
Inlines.OpusAssert(ret == SilkError.SILK_NO_ERROR);
}
encState.nChannelsAPI = 1;
encState.nChannelsInternal = 1;
/* Read control structure */
ret += silk_QueryEncoder(encState, encStatus);
Inlines.OpusAssert(ret == SilkError.SILK_NO_ERROR);
return(ret);
}
/// <summary>
/// Encode frame with Silk
/// Note: if prefillFlag is set, the input must contain 10 ms of audio, irrespective of what
/// encControl.payloadSize_ms is set to
/// </summary>
/// <param name="psEnc">I/O State</param>
/// <param name="encControl">I Control status</param>
/// <param name="samplesIn">I Speech sample input vector</param>
/// <param name="nSamplesIn">I Number of samples in input vector</param>
/// <param name="psRangeEnc">I/O Compressor data structure</param>
/// <param name="nBytesOut">I/O Number of bytes in payload (input: Max bytes)</param>
/// <param name="prefillFlag">I Flag to indicate prefilling buffers no coding</param>
/// <returns>error code</returns>
internal static int silk_Encode(
SilkEncoder psEnc,
EncControlState encControl,
short[] samplesIn,
int nSamplesIn,
EntropyCoder psRangeEnc,
BoxedValueInt nBytesOut,
int prefillFlag)
{
int ret = SilkError.SILK_NO_ERROR;
int n, i, nBits, flags, tmp_payloadSize_ms = 0, tmp_complexity = 0;
int nSamplesToBuffer, nSamplesToBufferMax, nBlocksOf10ms;
int nSamplesFromInput = 0, nSamplesFromInputMax;
int speech_act_thr_for_switch_Q8;
int TargetRate_bps, channelRate_bps, LBRR_symbol, sum;
int[] MStargetRates_bps = new int[2];
short[] buf;
int transition, curr_block, tot_blocks;
nBytesOut.Val = 0;
if (encControl.reducedDependency != 0)
{
psEnc.state_Fxx[0].first_frame_after_reset = 1;
psEnc.state_Fxx[1].first_frame_after_reset = 1;
}
psEnc.state_Fxx[0].nFramesEncoded = psEnc.state_Fxx[1].nFramesEncoded = 0;
/* Check values in encoder control structure */
ret += encControl.check_control_input();
if (ret != SilkError.SILK_NO_ERROR)
{
Inlines.OpusAssert(false);
return(ret);
}
encControl.switchReady = 0;
if (encControl.nChannelsInternal > psEnc.nChannelsInternal)
{
/* Mono . Stereo transition: init state of second channel and stereo state */
ret += SilkEncoder.silk_init_encoder(psEnc.state_Fxx[1]);
Arrays.MemSetShort(psEnc.sStereo.pred_prev_Q13, 0, 2);
Arrays.MemSetShort(psEnc.sStereo.sSide, 0, 2);
psEnc.sStereo.mid_side_amp_Q0[0] = 0;
psEnc.sStereo.mid_side_amp_Q0[1] = 1;
psEnc.sStereo.mid_side_amp_Q0[2] = 0;
psEnc.sStereo.mid_side_amp_Q0[3] = 1;
psEnc.sStereo.width_prev_Q14 = 0;
psEnc.sStereo.smth_width_Q14 = (short)(((int)((1.0f) * ((long)1 << (14)) + 0.5)) /*Inlines.SILK_CONST(1.0f, 14)*/);
if (psEnc.nChannelsAPI == 2)
{
psEnc.state_Fxx[1].resampler_state.Assign(psEnc.state_Fxx[0].resampler_state);
Array.Copy(psEnc.state_Fxx[0].In_HP_State, psEnc.state_Fxx[1].In_HP_State, 2);
}
}
transition = ((encControl.payloadSize_ms != psEnc.state_Fxx[0].PacketSize_ms) || (psEnc.nChannelsInternal != encControl.nChannelsInternal)) ? 1 : 0;
psEnc.nChannelsAPI = encControl.nChannelsAPI;
psEnc.nChannelsInternal = encControl.nChannelsInternal;
nBlocksOf10ms = Inlines.silk_DIV32(100 * nSamplesIn, encControl.API_sampleRate);
tot_blocks = (nBlocksOf10ms > 1) ? nBlocksOf10ms >> 1 : 1;
curr_block = 0;
if (prefillFlag != 0)
{
/* Only accept input length of 10 ms */
if (nBlocksOf10ms != 1)
{
Inlines.OpusAssert(false);
return(SilkError.SILK_ENC_INPUT_INVALID_NO_OF_SAMPLES);
}
/* Reset Encoder */
for (n = 0; n < encControl.nChannelsInternal; n++)
{
ret += SilkEncoder.silk_init_encoder(psEnc.state_Fxx[n]);
Inlines.OpusAssert(ret == SilkError.SILK_NO_ERROR);
}
tmp_payloadSize_ms = encControl.payloadSize_ms;
encControl.payloadSize_ms = 10;
tmp_complexity = encControl.complexity;
encControl.complexity = 0;
for (n = 0; n < encControl.nChannelsInternal; n++)
{
psEnc.state_Fxx[n].controlled_since_last_payload = 0;
psEnc.state_Fxx[n].prefillFlag = 1;
}
}
else
{
/* Only accept input lengths that are a multiple of 10 ms */
if (nBlocksOf10ms * encControl.API_sampleRate != 100 * nSamplesIn || nSamplesIn < 0)
{
Inlines.OpusAssert(false);
return(SilkError.SILK_ENC_INPUT_INVALID_NO_OF_SAMPLES);
}
/* Make sure no more than one packet can be produced */
if (1000 * (int)nSamplesIn > encControl.payloadSize_ms * encControl.API_sampleRate)
{
Inlines.OpusAssert(false);
return(SilkError.SILK_ENC_INPUT_INVALID_NO_OF_SAMPLES);
}
}
TargetRate_bps = Inlines.silk_RSHIFT32(encControl.bitRate, encControl.nChannelsInternal - 1);
for (n = 0; n < encControl.nChannelsInternal; n++)
{
/* Force the side channel to the same rate as the mid */
int force_fs_kHz = (n == 1) ? psEnc.state_Fxx[0].fs_kHz : 0;
ret += psEnc.state_Fxx[n].silk_control_encoder(encControl, TargetRate_bps, psEnc.allowBandwidthSwitch, n, force_fs_kHz);
if (ret != SilkError.SILK_NO_ERROR)
{
Inlines.OpusAssert(false);
return(ret);
}
if (psEnc.state_Fxx[n].first_frame_after_reset != 0 || transition != 0)
{
for (i = 0; i < psEnc.state_Fxx[0].nFramesPerPacket; i++)
{
psEnc.state_Fxx[n].LBRR_flags[i] = 0;
}
}
psEnc.state_Fxx[n].inDTX = psEnc.state_Fxx[n].useDTX;
}
Inlines.OpusAssert(encControl.nChannelsInternal == 1 || psEnc.state_Fxx[0].fs_kHz == psEnc.state_Fxx[1].fs_kHz);
/* Input buffering/resampling and encoding */
nSamplesToBufferMax = 10 * nBlocksOf10ms * psEnc.state_Fxx[0].fs_kHz;
nSamplesFromInputMax =
Inlines.silk_DIV32_16(nSamplesToBufferMax *
psEnc.state_Fxx[0].API_fs_Hz,
(short)(psEnc.state_Fxx[0].fs_kHz * 1000));
buf = new short[nSamplesFromInputMax];
int samplesIn_ptr = 0;
while (true)
{
nSamplesToBuffer = psEnc.state_Fxx[0].frame_length - psEnc.state_Fxx[0].inputBufIx;
nSamplesToBuffer = Inlines.silk_min(nSamplesToBuffer, nSamplesToBufferMax);
nSamplesFromInput = Inlines.silk_DIV32_16(nSamplesToBuffer * psEnc.state_Fxx[0].API_fs_Hz, psEnc.state_Fxx[0].fs_kHz * 1000);
/* Resample and write to buffer */
if (encControl.nChannelsAPI == 2 && encControl.nChannelsInternal == 2)
{
int id = psEnc.state_Fxx[0].nFramesEncoded;
for (n = 0; n < nSamplesFromInput; n++)
{
buf[n] = samplesIn[samplesIn_ptr + (2 * n)];
}
/* Making sure to start both resamplers from the same state when switching from mono to stereo */
if (psEnc.nPrevChannelsInternal == 1 && id == 0)
{
//silk_memcpy(&psEnc.state_Fxx[1].resampler_state, &psEnc.state_Fxx[0].resampler_state, sizeof(psEnc.state_Fxx[1].resampler_state));
psEnc.state_Fxx[1].resampler_state.Assign(psEnc.state_Fxx[0].resampler_state);
}
ret += Resampler.silk_resampler(
psEnc.state_Fxx[0].resampler_state,
psEnc.state_Fxx[0].inputBuf,
psEnc.state_Fxx[0].inputBufIx + 2,
buf,
0,
nSamplesFromInput);
psEnc.state_Fxx[0].inputBufIx += nSamplesToBuffer;
nSamplesToBuffer = psEnc.state_Fxx[1].frame_length - psEnc.state_Fxx[1].inputBufIx;
nSamplesToBuffer = Inlines.silk_min(nSamplesToBuffer, 10 * nBlocksOf10ms * psEnc.state_Fxx[1].fs_kHz);
for (n = 0; n < nSamplesFromInput; n++)
{
buf[n] = samplesIn[samplesIn_ptr + (2 * n) + 1];
}
ret += Resampler.silk_resampler(
psEnc.state_Fxx[1].resampler_state,
psEnc.state_Fxx[1].inputBuf,
psEnc.state_Fxx[1].inputBufIx + 2,
buf,
0,
nSamplesFromInput);
psEnc.state_Fxx[1].inputBufIx += nSamplesToBuffer;
}
else if (encControl.nChannelsAPI == 2 && encControl.nChannelsInternal == 1)
{
/* Combine left and right channels before resampling */
for (n = 0; n < nSamplesFromInput; n++)
{
sum = samplesIn[samplesIn_ptr + (2 * n)] + samplesIn[samplesIn_ptr + (2 * n) + 1];
buf[n] = (short)Inlines.silk_RSHIFT_ROUND(sum, 1);
}
ret += Resampler.silk_resampler(
psEnc.state_Fxx[0].resampler_state,
psEnc.state_Fxx[0].inputBuf,
psEnc.state_Fxx[0].inputBufIx + 2,
buf,
0,
nSamplesFromInput);
/* On the first mono frame, average the results for the two resampler states */
if (psEnc.nPrevChannelsInternal == 2 && psEnc.state_Fxx[0].nFramesEncoded == 0)
{
ret += Resampler.silk_resampler(
psEnc.state_Fxx[1].resampler_state,
psEnc.state_Fxx[1].inputBuf,
psEnc.state_Fxx[1].inputBufIx + 2,
buf,
0,
nSamplesFromInput);
for (n = 0; n < psEnc.state_Fxx[0].frame_length; n++)
{
psEnc.state_Fxx[0].inputBuf[psEnc.state_Fxx[0].inputBufIx + n + 2] =
(short)(Inlines.silk_RSHIFT(psEnc.state_Fxx[0].inputBuf[psEnc.state_Fxx[0].inputBufIx + n + 2]
+ psEnc.state_Fxx[1].inputBuf[psEnc.state_Fxx[1].inputBufIx + n + 2], 1));
}
}
psEnc.state_Fxx[0].inputBufIx += nSamplesToBuffer;
}
else
{
Inlines.OpusAssert(encControl.nChannelsAPI == 1 && encControl.nChannelsInternal == 1);
Array.Copy(samplesIn, samplesIn_ptr, buf, 0, nSamplesFromInput);
ret += Resampler.silk_resampler(
psEnc.state_Fxx[0].resampler_state,
psEnc.state_Fxx[0].inputBuf,
psEnc.state_Fxx[0].inputBufIx + 2,
buf,
0,
nSamplesFromInput);
psEnc.state_Fxx[0].inputBufIx += nSamplesToBuffer;
}
samplesIn_ptr += (nSamplesFromInput * encControl.nChannelsAPI);
nSamplesIn -= nSamplesFromInput;
/* Default */
psEnc.allowBandwidthSwitch = 0;
/* Silk encoder */
if (psEnc.state_Fxx[0].inputBufIx >= psEnc.state_Fxx[0].frame_length)
{
/* Enough data in input buffer, so encode */
Inlines.OpusAssert(psEnc.state_Fxx[0].inputBufIx == psEnc.state_Fxx[0].frame_length);
Inlines.OpusAssert(encControl.nChannelsInternal == 1 || psEnc.state_Fxx[1].inputBufIx == psEnc.state_Fxx[1].frame_length);
/* Deal with LBRR data */
if (psEnc.state_Fxx[0].nFramesEncoded == 0 && prefillFlag == 0)
{
/* Create space at start of payload for VAD and FEC flags */
byte[] iCDF = { 0, 0 };
iCDF[0] = (byte)(256 - Inlines.silk_RSHIFT(256, (psEnc.state_Fxx[0].nFramesPerPacket + 1) * encControl.nChannelsInternal));
psRangeEnc.enc_icdf(0, iCDF, 8);
/* Encode any LBRR data from previous packet */
/* Encode LBRR flags */
for (n = 0; n < encControl.nChannelsInternal; n++)
{
LBRR_symbol = 0;
for (i = 0; i < psEnc.state_Fxx[n].nFramesPerPacket; i++)
{
LBRR_symbol |= Inlines.silk_LSHIFT(psEnc.state_Fxx[n].LBRR_flags[i], i);
}
psEnc.state_Fxx[n].LBRR_flag = (sbyte)(LBRR_symbol > 0 ? 1 : 0);
if (LBRR_symbol != 0 && psEnc.state_Fxx[n].nFramesPerPacket > 1)
{
psRangeEnc.enc_icdf(LBRR_symbol - 1, Tables.silk_LBRR_flags_iCDF_ptr[psEnc.state_Fxx[n].nFramesPerPacket - 2], 8);
}
}
/* Code LBRR indices and excitation signals */
for (i = 0; i < psEnc.state_Fxx[0].nFramesPerPacket; i++)
{
for (n = 0; n < encControl.nChannelsInternal; n++)
{
if (psEnc.state_Fxx[n].LBRR_flags[i] != 0)
{
int condCoding;
if (encControl.nChannelsInternal == 2 && n == 0)
{
Stereo.silk_stereo_encode_pred(psRangeEnc, psEnc.sStereo.predIx[i]);
/* For LBRR data there's no need to code the mid-only flag if the side-channel LBRR flag is set */
if (psEnc.state_Fxx[1].LBRR_flags[i] == 0)
{
Stereo.silk_stereo_encode_mid_only(psRangeEnc, psEnc.sStereo.mid_only_flags[i]);
}
}
/* Use conditional coding if previous frame available */
if (i > 0 && psEnc.state_Fxx[n].LBRR_flags[i - 1] != 0)
{
condCoding = SilkConstants.CODE_CONDITIONALLY;
}
else
{
condCoding = SilkConstants.CODE_INDEPENDENTLY;
}
EncodeIndices.silk_encode_indices(psEnc.state_Fxx[n], psRangeEnc, i, 1, condCoding);
EncodePulses.silk_encode_pulses(psRangeEnc, psEnc.state_Fxx[n].indices_LBRR[i].signalType, psEnc.state_Fxx[n].indices_LBRR[i].quantOffsetType,
psEnc.state_Fxx[n].pulses_LBRR[i], psEnc.state_Fxx[n].frame_length);
}
}
}
/* Reset LBRR flags */
for (n = 0; n < encControl.nChannelsInternal; n++)
{
Arrays.MemSetInt(psEnc.state_Fxx[n].LBRR_flags, 0, SilkConstants.MAX_FRAMES_PER_PACKET);
}
psEnc.nBitsUsedLBRR = psRangeEnc.tell();
}
HPVariableCutoff.silk_HP_variable_cutoff(psEnc.state_Fxx);
/* Total target bits for packet */
nBits = Inlines.silk_DIV32_16(Inlines.silk_MUL(encControl.bitRate, encControl.payloadSize_ms), 1000);
/* Subtract bits used for LBRR */
if (prefillFlag == 0)
{
nBits -= psEnc.nBitsUsedLBRR;
}
/* Divide by number of uncoded frames left in packet */
nBits = Inlines.silk_DIV32_16(nBits, psEnc.state_Fxx[0].nFramesPerPacket);
/* Convert to bits/second */
if (encControl.payloadSize_ms == 10)
{
TargetRate_bps = Inlines.silk_SMULBB(nBits, 100);
}
else
{
TargetRate_bps = Inlines.silk_SMULBB(nBits, 50);
}
/* Subtract fraction of bits in excess of target in previous frames and packets */
TargetRate_bps -= Inlines.silk_DIV32_16(Inlines.silk_MUL(psEnc.nBitsExceeded, 1000), TuningParameters.BITRESERVOIR_DECAY_TIME_MS);
if (prefillFlag == 0 && psEnc.state_Fxx[0].nFramesEncoded > 0)
{
/* Compare actual vs target bits so far in this packet */
int bitsBalance = psRangeEnc.tell() - psEnc.nBitsUsedLBRR - nBits * psEnc.state_Fxx[0].nFramesEncoded;
TargetRate_bps -= Inlines.silk_DIV32_16(Inlines.silk_MUL(bitsBalance, 1000), TuningParameters.BITRESERVOIR_DECAY_TIME_MS);
}
/* Never exceed input bitrate */
TargetRate_bps = Inlines.silk_LIMIT(TargetRate_bps, encControl.bitRate, 5000);
/* Convert Left/Right to Mid/Side */
if (encControl.nChannelsInternal == 2)
{
BoxedValueSbyte midOnlyFlagBoxed = new BoxedValueSbyte(psEnc.sStereo.mid_only_flags[psEnc.state_Fxx[0].nFramesEncoded]);
Stereo.silk_stereo_LR_to_MS(psEnc.sStereo,
psEnc.state_Fxx[0].inputBuf,
2,
psEnc.state_Fxx[1].inputBuf,
2,
psEnc.sStereo.predIx[psEnc.state_Fxx[0].nFramesEncoded],
midOnlyFlagBoxed,
MStargetRates_bps,
TargetRate_bps,
psEnc.state_Fxx[0].speech_activity_Q8,
encControl.toMono,
psEnc.state_Fxx[0].fs_kHz,
psEnc.state_Fxx[0].frame_length);
psEnc.sStereo.mid_only_flags[psEnc.state_Fxx[0].nFramesEncoded] = midOnlyFlagBoxed.Val;
if (midOnlyFlagBoxed.Val == 0)
{
/* Reset side channel encoder memory for first frame with side coding */
if (psEnc.prev_decode_only_middle == 1)
{
psEnc.state_Fxx[1].sShape.Reset();
psEnc.state_Fxx[1].sPrefilt.Reset();
psEnc.state_Fxx[1].sNSQ.Reset();
Arrays.MemSetShort(psEnc.state_Fxx[1].prev_NLSFq_Q15, 0, SilkConstants.MAX_LPC_ORDER);
Arrays.MemSetInt(psEnc.state_Fxx[1].sLP.In_LP_State, 0, 2);
psEnc.state_Fxx[1].prevLag = 100;
psEnc.state_Fxx[1].sNSQ.lagPrev = 100;
psEnc.state_Fxx[1].sShape.LastGainIndex = 10;
psEnc.state_Fxx[1].prevSignalType = SilkConstants.TYPE_NO_VOICE_ACTIVITY;
psEnc.state_Fxx[1].sNSQ.prev_gain_Q16 = 65536;
psEnc.state_Fxx[1].first_frame_after_reset = 1;
}
psEnc.state_Fxx[1].silk_encode_do_VAD();
}
else
{
psEnc.state_Fxx[1].VAD_flags[psEnc.state_Fxx[0].nFramesEncoded] = 0;
}
if (prefillFlag == 0)
{
Stereo.silk_stereo_encode_pred(psRangeEnc, psEnc.sStereo.predIx[psEnc.state_Fxx[0].nFramesEncoded]);
if (psEnc.state_Fxx[1].VAD_flags[psEnc.state_Fxx[0].nFramesEncoded] == 0)
{
Stereo.silk_stereo_encode_mid_only(psRangeEnc, psEnc.sStereo.mid_only_flags[psEnc.state_Fxx[0].nFramesEncoded]);
}
}
}
else
{
/* Buffering */
Array.Copy(psEnc.sStereo.sMid, psEnc.state_Fxx[0].inputBuf, 2);
Array.Copy(psEnc.state_Fxx[0].inputBuf, psEnc.state_Fxx[0].frame_length, psEnc.sStereo.sMid, 0, 2);
}
psEnc.state_Fxx[0].silk_encode_do_VAD();
/* Encode */
for (n = 0; n < encControl.nChannelsInternal; n++)
{
int maxBits, useCBR;
/* Handling rate constraints */
maxBits = encControl.maxBits;
if (tot_blocks == 2 && curr_block == 0)
{
maxBits = maxBits * 3 / 5;
}
else if (tot_blocks == 3)
{
if (curr_block == 0)
{
maxBits = maxBits * 2 / 5;
}
else if (curr_block == 1)
{
maxBits = maxBits * 3 / 4;
}
}
useCBR = (encControl.useCBR != 0 && curr_block == tot_blocks - 1) ? 1 : 0;
if (encControl.nChannelsInternal == 1)
{
channelRate_bps = TargetRate_bps;
}
else
{
channelRate_bps = MStargetRates_bps[n];
if (n == 0 && MStargetRates_bps[1] > 0)
{
useCBR = 0;
/* Give mid up to 1/2 of the max bits for that frame */
maxBits -= encControl.maxBits / (tot_blocks * 2);
}
}
if (channelRate_bps > 0)
{
int condCoding;
psEnc.state_Fxx[n].silk_control_SNR(channelRate_bps);
/* Use independent coding if no previous frame available */
if (psEnc.state_Fxx[0].nFramesEncoded - n <= 0)
{
condCoding = SilkConstants.CODE_INDEPENDENTLY;
}
else if (n > 0 && psEnc.prev_decode_only_middle != 0)
{
/* If we skipped a side frame in this packet, we don't
* need LTP scaling; the LTP state is well-defined. */
condCoding = SilkConstants.CODE_INDEPENDENTLY_NO_LTP_SCALING;
}
else
{
condCoding = SilkConstants.CODE_CONDITIONALLY;
}
ret += psEnc.state_Fxx[n].silk_encode_frame(nBytesOut, psRangeEnc, condCoding, maxBits, useCBR);
Inlines.OpusAssert(ret == SilkError.SILK_NO_ERROR);
}
psEnc.state_Fxx[n].controlled_since_last_payload = 0;
psEnc.state_Fxx[n].inputBufIx = 0;
psEnc.state_Fxx[n].nFramesEncoded++;
}
psEnc.prev_decode_only_middle = psEnc.sStereo.mid_only_flags[psEnc.state_Fxx[0].nFramesEncoded - 1];
/* Insert VAD and FEC flags at beginning of bitstream */
if (nBytesOut.Val > 0 && psEnc.state_Fxx[0].nFramesEncoded == psEnc.state_Fxx[0].nFramesPerPacket)
{
flags = 0;
for (n = 0; n < encControl.nChannelsInternal; n++)
{
for (i = 0; i < psEnc.state_Fxx[n].nFramesPerPacket; i++)
{
flags = Inlines.silk_LSHIFT(flags, 1);
flags |= (int)psEnc.state_Fxx[n].VAD_flags[i];
}
flags = Inlines.silk_LSHIFT(flags, 1);
flags |= (int)psEnc.state_Fxx[n].LBRR_flag;
}
if (prefillFlag == 0)
{
psRangeEnc.enc_patch_initial_bits((uint)flags, (uint)((psEnc.state_Fxx[0].nFramesPerPacket + 1) * encControl.nChannelsInternal));
}
/* Return zero bytes if all channels DTXed */
if (psEnc.state_Fxx[0].inDTX != 0 && (encControl.nChannelsInternal == 1 || psEnc.state_Fxx[1].inDTX != 0))
{
nBytesOut.Val = 0;
}
psEnc.nBitsExceeded += nBytesOut.Val * 8;
psEnc.nBitsExceeded -= Inlines.silk_DIV32_16(Inlines.silk_MUL(encControl.bitRate, encControl.payloadSize_ms), 1000);
psEnc.nBitsExceeded = Inlines.silk_LIMIT(psEnc.nBitsExceeded, 0, 10000);
/* Update flag indicating if bandwidth switching is allowed */
speech_act_thr_for_switch_Q8 = Inlines.silk_SMLAWB(((int)((TuningParameters.SPEECH_ACTIVITY_DTX_THRES) * ((long)1 << (8)) + 0.5)) /*Inlines.SILK_CONST(TuningParameters.SPEECH_ACTIVITY_DTX_THRES, 8)*/,
((int)(((1 - TuningParameters.SPEECH_ACTIVITY_DTX_THRES) / TuningParameters.MAX_BANDWIDTH_SWITCH_DELAY_MS) * ((long)1 << (16 + 8)) + 0.5)) /*Inlines.SILK_CONST((1 - TuningParameters.SPEECH_ACTIVITY_DTX_THRES) / TuningParameters.MAX_BANDWIDTH_SWITCH_DELAY_MS, 16 + 8)*/,
psEnc.timeSinceSwitchAllowed_ms);
if (psEnc.state_Fxx[0].speech_activity_Q8 < speech_act_thr_for_switch_Q8)
{
psEnc.allowBandwidthSwitch = 1;
psEnc.timeSinceSwitchAllowed_ms = 0;
}
else
{
psEnc.allowBandwidthSwitch = 0;
psEnc.timeSinceSwitchAllowed_ms += encControl.payloadSize_ms;
}
}
if (nSamplesIn == 0)
{
break;
}
}
else
{
break;
}
curr_block++;
}
psEnc.nPrevChannelsInternal = encControl.nChannelsInternal;
encControl.allowBandwidthSwitch = psEnc.allowBandwidthSwitch;
encControl.inWBmodeWithoutVariableLP = (psEnc.state_Fxx[0].fs_kHz == 16 && psEnc.state_Fxx[0].sLP.mode == 0) ? 1 : 0;
encControl.internalSampleRate = Inlines.silk_SMULBB(psEnc.state_Fxx[0].fs_kHz, 1000);
encControl.stereoWidth_Q14 = encControl.toMono != 0 ? 0 : psEnc.sStereo.smth_width_Q14;
if (prefillFlag != 0)
{
encControl.payloadSize_ms = tmp_payloadSize_ms;
encControl.complexity = tmp_complexity;
for (n = 0; n < encControl.nChannelsInternal; n++)
{
psEnc.state_Fxx[n].controlled_since_last_payload = 0;
psEnc.state_Fxx[n].prefillFlag = 0;
}
}
return(ret);
}