int WebRtcIsacfix_EstimateBandwidth(BwEstimatorstr *bwest_str, Bitstr_dec *streamdata, WebRtc_Word32 packet_size, WebRtc_UWord16 rtp_seq_number, WebRtc_UWord32 send_ts, WebRtc_UWord32 arr_ts) { WebRtc_Word16 index; WebRtc_Word16 frame_samples; int err; /* decode framelength */ err = WebRtcIsacfix_DecodeFrameLen(streamdata, &frame_samples); /* error check */ if (err<0) { return err; } /* decode BW estimation */ err = WebRtcIsacfix_DecodeSendBandwidth(streamdata, &index); /* error check */ if (err<0) { return err; } /* Update BWE with received data */ err = WebRtcIsacfix_UpdateUplinkBwImpl( bwest_str, rtp_seq_number, (WebRtc_UWord16)WEBRTC_SPL_UDIV(WEBRTC_SPL_UMUL(frame_samples,1000), FS), send_ts, arr_ts, (WebRtc_Word16) packet_size, /* in bytes */ index); /* error check */ if (err<0) { return err; } /* Succesful */ return 0; }
int16_t WebRtcIsacfix_DecodeImpl(int16_t *signal_out16, ISACFIX_DecInst_t *ISACdec_obj, int16_t *current_framesamples) { int k; int err; int16_t BWno; int16_t len = 0; int16_t model; int16_t Vector_Word16_1[FRAMESAMPLES/2]; int16_t Vector_Word16_2[FRAMESAMPLES/2]; int32_t Vector_Word32_1[FRAMESAMPLES/2]; int32_t Vector_Word32_2[FRAMESAMPLES/2]; int16_t lofilt_coefQ15[ORDERLO*SUBFRAMES]; //refl. coeffs int16_t hifilt_coefQ15[ORDERHI*SUBFRAMES]; //refl. coeffs int32_t gain_lo_hiQ17[2*SUBFRAMES]; int16_t PitchLags_Q7[PITCH_SUBFRAMES]; int16_t PitchGains_Q12[PITCH_SUBFRAMES]; int16_t AvgPitchGain_Q12; int16_t tmp_1, tmp_2; int32_t tmp32a, tmp32b; int16_t gainQ13; int16_t frame_nb; /* counter */ int16_t frame_mode; /* 0 for 20ms and 30ms, 1 for 60ms */ int16_t processed_samples; /* PLC */ int16_t overlapWin[ 240 ]; (ISACdec_obj->bitstr_obj).W_upper = 0xFFFFFFFF; (ISACdec_obj->bitstr_obj).streamval = 0; (ISACdec_obj->bitstr_obj).stream_index = 0; (ISACdec_obj->bitstr_obj).full = 1; /* decode framelength and BW estimation - not used, only for stream pointer*/ err = WebRtcIsacfix_DecodeFrameLen(&ISACdec_obj->bitstr_obj, current_framesamples); if (err<0) // error check return err; frame_mode = (int16_t)WEBRTC_SPL_DIV(*current_framesamples, MAX_FRAMESAMPLES); /* 0, or 1 */ processed_samples = (int16_t)WEBRTC_SPL_DIV(*current_framesamples, frame_mode+1); /* either 320 (20ms) or 480 (30, 60 ms) */ err = WebRtcIsacfix_DecodeSendBandwidth(&ISACdec_obj->bitstr_obj, &BWno); if (err<0) // error check return err; /* one loop if it's one frame (20 or 30ms), 2 loops if 2 frames bundled together (60ms) */ for (frame_nb = 0; frame_nb <= frame_mode; frame_nb++) { /* decode & dequantize pitch parameters */ err = WebRtcIsacfix_DecodePitchGain(&(ISACdec_obj->bitstr_obj), PitchGains_Q12); if (err<0) // error check return err; err = WebRtcIsacfix_DecodePitchLag(&ISACdec_obj->bitstr_obj, PitchGains_Q12, PitchLags_Q7); if (err<0) // error check return err; AvgPitchGain_Q12 = (int16_t)(((int32_t)PitchGains_Q12[0] + PitchGains_Q12[1] + PitchGains_Q12[2] + PitchGains_Q12[3])>>2); /* decode & dequantize FiltCoef */ err = WebRtcIsacfix_DecodeLpc(gain_lo_hiQ17, lofilt_coefQ15, hifilt_coefQ15, &ISACdec_obj->bitstr_obj, &model); if (err<0) // error check return err; /* decode & dequantize spectrum */ len = WebRtcIsacfix_DecodeSpec(&ISACdec_obj->bitstr_obj, Vector_Word16_1, Vector_Word16_2, AvgPitchGain_Q12); if (len < 0) // error check return len; // Why does this need Q16 in and out? /JS WebRtcIsacfix_Spec2Time(Vector_Word16_1, Vector_Word16_2, Vector_Word32_1, Vector_Word32_2); for (k=0; k<FRAMESAMPLES/2; k++) { Vector_Word16_1[k] = (int16_t)WEBRTC_SPL_RSHIFT_W32(Vector_Word32_1[k]+64, 7); //Q16 -> Q9 } /* ---- If this is recovery frame ---- */ if( (ISACdec_obj->plcstr_obj).used == PLC_WAS_USED ) { (ISACdec_obj->plcstr_obj).used = PLC_NOT_USED; if( (ISACdec_obj->plcstr_obj).B < 1000 ) { (ISACdec_obj->plcstr_obj).decayCoeffPriodic = 4000; } ISACdec_obj->plcstr_obj.decayCoeffPriodic = WEBRTC_SPL_WORD16_MAX; /* DECAY_RATE is in Q15 */ ISACdec_obj->plcstr_obj.decayCoeffNoise = WEBRTC_SPL_WORD16_MAX; /* DECAY_RATE is in Q15 */ ISACdec_obj->plcstr_obj.pitchCycles = 0; PitchGains_Q12[0] = (int16_t)WEBRTC_SPL_MUL_16_16_RSFT(PitchGains_Q12[0], 700, 10 ); /* ---- Add-overlap ---- */ WebRtcSpl_GetHanningWindow( overlapWin, RECOVERY_OVERLAP ); for( k = 0; k < RECOVERY_OVERLAP; k++ ) Vector_Word16_1[k] = WebRtcSpl_AddSatW16( (int16_t)WEBRTC_SPL_MUL_16_16_RSFT( (ISACdec_obj->plcstr_obj).overlapLP[k], overlapWin[RECOVERY_OVERLAP - k - 1], 14), (int16_t)WEBRTC_SPL_MUL_16_16_RSFT( Vector_Word16_1[k], overlapWin[k], 14) ); } /* --- Store side info --- */ if( frame_nb == frame_mode ) { /* --- LPC info */ WEBRTC_SPL_MEMCPY_W16( (ISACdec_obj->plcstr_obj).lofilt_coefQ15, &lofilt_coefQ15[(SUBFRAMES-1)*ORDERLO], ORDERLO ); WEBRTC_SPL_MEMCPY_W16( (ISACdec_obj->plcstr_obj).hifilt_coefQ15, &hifilt_coefQ15[(SUBFRAMES-1)*ORDERHI], ORDERHI ); (ISACdec_obj->plcstr_obj).gain_lo_hiQ17[0] = gain_lo_hiQ17[(SUBFRAMES-1) * 2]; (ISACdec_obj->plcstr_obj).gain_lo_hiQ17[1] = gain_lo_hiQ17[(SUBFRAMES-1) * 2 + 1]; /* --- LTP info */ (ISACdec_obj->plcstr_obj).AvgPitchGain_Q12 = PitchGains_Q12[3]; (ISACdec_obj->plcstr_obj).lastPitchGain_Q12 = PitchGains_Q12[3]; (ISACdec_obj->plcstr_obj).lastPitchLag_Q7 = PitchLags_Q7[3]; if( PitchLags_Q7[3] < 3000 ) (ISACdec_obj->plcstr_obj).lastPitchLag_Q7 += PitchLags_Q7[3]; WEBRTC_SPL_MEMCPY_W16( (ISACdec_obj->plcstr_obj).prevPitchInvIn, Vector_Word16_1, FRAMESAMPLES/2 ); } /* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ /* inverse pitch filter */ WebRtcIsacfix_PitchFilter(Vector_Word16_1, Vector_Word16_2, &ISACdec_obj->pitchfiltstr_obj, PitchLags_Q7, PitchGains_Q12, 4); if( frame_nb == frame_mode ) { WEBRTC_SPL_MEMCPY_W16( (ISACdec_obj->plcstr_obj).prevPitchInvOut, &(Vector_Word16_2[FRAMESAMPLES/2 - (PITCH_MAX_LAG + 10)]), PITCH_MAX_LAG ); } /* reduce gain to compensate for pitch enhancer */ /* gain = 1.0f - 0.45f * AvgPitchGain; */ tmp32a = WEBRTC_SPL_MUL_16_16_RSFT(AvgPitchGain_Q12, 29, 0); // Q18 tmp32b = 262144 - tmp32a; // Q18 gainQ13 = (int16_t) WEBRTC_SPL_RSHIFT_W32(tmp32b, 5); // Q13 for (k = 0; k < FRAMESAMPLES/2; k++) { Vector_Word32_1[k] = (int32_t) WEBRTC_SPL_LSHIFT_W32(WEBRTC_SPL_MUL_16_16(Vector_Word16_2[k], gainQ13), 3); // Q25 } /* perceptual post-filtering (using normalized lattice filter) */ WebRtcIsacfix_NormLatticeFilterAr(ORDERLO, (ISACdec_obj->maskfiltstr_obj).PostStateLoGQ0, Vector_Word32_1, lofilt_coefQ15, gain_lo_hiQ17, 0, Vector_Word16_1); /* --- Store Highpass Residual --- */ for (k = 0; k < FRAMESAMPLES/2; k++) Vector_Word32_1[k] = WEBRTC_SPL_LSHIFT_W32(Vector_Word32_2[k], 9); // Q16 -> Q25 for( k = 0; k < PITCH_MAX_LAG + 10; k++ ) (ISACdec_obj->plcstr_obj).prevHP[k] = Vector_Word32_1[FRAMESAMPLES/2 - (PITCH_MAX_LAG + 10) + k]; WebRtcIsacfix_NormLatticeFilterAr(ORDERHI, (ISACdec_obj->maskfiltstr_obj).PostStateHiGQ0, Vector_Word32_1, hifilt_coefQ15, gain_lo_hiQ17, 1, Vector_Word16_2); /* recombine the 2 bands */ /* Form the polyphase signals, and compensate for DC offset */ for (k=0;k<FRAMESAMPLES/2;k++) { tmp_1 = (int16_t)WebRtcSpl_SatW32ToW16(((int32_t)Vector_Word16_1[k]+Vector_Word16_2[k] + 1)); /* Construct a new upper channel signal*/ tmp_2 = (int16_t)WebRtcSpl_SatW32ToW16(((int32_t)Vector_Word16_1[k]-Vector_Word16_2[k])); /* Construct a new lower channel signal*/ Vector_Word16_1[k] = tmp_1; Vector_Word16_2[k] = tmp_2; } WebRtcIsacfix_FilterAndCombine1(Vector_Word16_1, Vector_Word16_2, signal_out16 + frame_nb * processed_samples, &ISACdec_obj->postfiltbankstr_obj); } return len; }