mirror of
https://github.com/signalwire/freeswitch.git
synced 2025-02-24 18:41:57 +00:00
89 lines
2.9 KiB
C
89 lines
2.9 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
|
||
|
|
*
|
||
|
|
* Use of this source code is governed by a BSD-style license
|
||
|
|
* that can be found in the LICENSE file in the root of the source
|
||
|
|
* tree. An additional intellectual property rights grant can be found
|
||
|
|
* in the file PATENTS. All contributing project authors may
|
||
|
|
* be found in the AUTHORS file in the root of the source tree.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "structs.h"
|
||
|
|
#include "bandwidth_estimator.h"
|
||
|
|
#include "entropy_coding.h"
|
||
|
|
#include "codec.h"
|
||
|
|
|
||
|
|
|
||
|
|
int
|
||
|
|
WebRtcIsac_EstimateBandwidth(
|
||
|
|
BwEstimatorstr* bwest_str,
|
||
|
|
Bitstr* streamdata,
|
||
|
|
WebRtc_Word32 packet_size,
|
||
|
|
WebRtc_UWord16 rtp_seq_number,
|
||
|
|
WebRtc_UWord32 send_ts,
|
||
|
|
WebRtc_UWord32 arr_ts,
|
||
|
|
enum IsacSamplingRate encoderSampRate,
|
||
|
|
enum IsacSamplingRate decoderSampRate)
|
||
|
|
{
|
||
|
|
WebRtc_Word16 index;
|
||
|
|
WebRtc_Word16 frame_samples;
|
||
|
|
WebRtc_UWord32 sendTimestampIn16kHz;
|
||
|
|
WebRtc_UWord32 arrivalTimestampIn16kHz;
|
||
|
|
WebRtc_UWord32 diffSendTime;
|
||
|
|
WebRtc_UWord32 diffArrivalTime;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
/* decode framelength and BW estimation */
|
||
|
|
err = WebRtcIsac_DecodeFrameLen(streamdata, &frame_samples);
|
||
|
|
if(err < 0) // error check
|
||
|
|
{
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
err = WebRtcIsac_DecodeSendBW(streamdata, &index);
|
||
|
|
if(err < 0) // error check
|
||
|
|
{
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* UPDATE ESTIMATES FROM OTHER SIDE */
|
||
|
|
err = WebRtcIsac_UpdateUplinkBwImpl(bwest_str, index, encoderSampRate);
|
||
|
|
if(err < 0)
|
||
|
|
{
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
// We like BWE to work at 16 kHz sampling rate,
|
||
|
|
// therefore, we have to change the timestamps accordingly.
|
||
|
|
// translate the send timestamp if required
|
||
|
|
diffSendTime = (WebRtc_UWord32)((WebRtc_UWord32)send_ts -
|
||
|
|
(WebRtc_UWord32)bwest_str->senderTimestamp);
|
||
|
|
bwest_str->senderTimestamp = send_ts;
|
||
|
|
|
||
|
|
diffArrivalTime = (WebRtc_UWord32)((WebRtc_UWord32)arr_ts -
|
||
|
|
(WebRtc_UWord32)bwest_str->receiverTimestamp);
|
||
|
|
bwest_str->receiverTimestamp = arr_ts;
|
||
|
|
|
||
|
|
if(decoderSampRate == kIsacSuperWideband)
|
||
|
|
{
|
||
|
|
diffArrivalTime = (WebRtc_UWord32)diffArrivalTime >> 1;
|
||
|
|
diffSendTime = (WebRtc_UWord32)diffSendTime >> 1;
|
||
|
|
}
|
||
|
|
// arrival timestamp in 16 kHz
|
||
|
|
arrivalTimestampIn16kHz = (WebRtc_UWord32)((WebRtc_UWord32)
|
||
|
|
bwest_str->prev_rec_arr_ts + (WebRtc_UWord32)diffArrivalTime);
|
||
|
|
// send timestamp in 16 kHz
|
||
|
|
sendTimestampIn16kHz = (WebRtc_UWord32)((WebRtc_UWord32)
|
||
|
|
bwest_str->prev_rec_send_ts + (WebRtc_UWord32)diffSendTime);
|
||
|
|
|
||
|
|
err = WebRtcIsac_UpdateBandwidthEstimator(bwest_str, rtp_seq_number,
|
||
|
|
(frame_samples * 1000) / FS, sendTimestampIn16kHz,
|
||
|
|
arrivalTimestampIn16kHz, packet_size);
|
||
|
|
// error check
|
||
|
|
if(err < 0)
|
||
|
|
{
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|