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be74b8058b
Bug: None Change-Id: I439e217d67283b182833e48da15af9ae367ac14e Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/256015 Reviewed-by: Harald Alvestrand <hta@webrtc.org> Commit-Queue: Niels Moller <nisse@webrtc.org> Cr-Commit-Position: refs/heads/main@{#36257}
486 lines
17 KiB
C
486 lines
17 KiB
C
/*
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* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef MODULES_AUDIO_CODING_CODECS_ISAC_FIX_INCLUDE_ISACFIX_H_
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#define MODULES_AUDIO_CODING_CODECS_ISAC_FIX_INCLUDE_ISACFIX_H_
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#include <stddef.h>
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#include "modules/audio_coding/codecs/isac/bandwidth_info.h"
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typedef struct {
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void* dummy;
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} ISACFIX_MainStruct;
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#if defined(__cplusplus)
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extern "C" {
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#endif
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/****************************************************************************
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* WebRtcIsacfix_Create(...)
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*
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* This function creates an ISAC instance, which will contain the state
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* information for one coding/decoding channel.
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*
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* Input:
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* - *ISAC_main_inst : a pointer to the coder instance.
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*
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* Return value : 0 - Ok
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* -1 - Error
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*/
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int16_t WebRtcIsacfix_Create(ISACFIX_MainStruct** ISAC_main_inst);
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/****************************************************************************
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* WebRtcIsacfix_Free(...)
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*
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* This function frees the ISAC instance created at the beginning.
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*
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* Input:
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* - ISAC_main_inst : a ISAC instance.
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*
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* Return value : 0 - Ok
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* -1 - Error
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*/
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int16_t WebRtcIsacfix_Free(ISACFIX_MainStruct* ISAC_main_inst);
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/****************************************************************************
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* WebRtcIsacfix_EncoderInit(...)
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*
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* This function initializes an ISAC instance prior to the encoder calls.
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*
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* Input:
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* - ISAC_main_inst : ISAC instance.
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* - CodingMode : 0 - Bit rate and frame length are automatically
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* adjusted to available bandwidth on
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* transmission channel.
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* 1 - User sets a frame length and a target bit
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* rate which is taken as the maximum short-term
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* average bit rate.
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*
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* Return value : 0 - Ok
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* -1 - Error
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*/
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int16_t WebRtcIsacfix_EncoderInit(ISACFIX_MainStruct* ISAC_main_inst,
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int16_t CodingMode);
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/****************************************************************************
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* WebRtcIsacfix_Encode(...)
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*
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* This function encodes 10ms frame(s) and inserts it into a package.
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* Input speech length has to be 160 samples (10ms). The encoder buffers those
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* 10ms frames until it reaches the chosen Framesize (480 or 960 samples
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* corresponding to 30 or 60 ms frames), and then proceeds to the encoding.
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*
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* Input:
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* - ISAC_main_inst : ISAC instance.
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* - speechIn : input speech vector.
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*
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* Output:
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* - encoded : the encoded data vector
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*
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* Return value : >0 - Length (in bytes) of coded data
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* 0 - The buffer didn't reach the chosen framesize
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* so it keeps buffering speech samples.
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* -1 - Error
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*/
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int WebRtcIsacfix_Encode(ISACFIX_MainStruct* ISAC_main_inst,
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const int16_t* speechIn,
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uint8_t* encoded);
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/****************************************************************************
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* WebRtcIsacfix_DecoderInit(...)
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*
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* This function initializes an ISAC instance prior to the decoder calls.
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*
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* Input:
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* - ISAC_main_inst : ISAC instance.
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*/
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void WebRtcIsacfix_DecoderInit(ISACFIX_MainStruct* ISAC_main_inst);
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/****************************************************************************
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* WebRtcIsacfix_UpdateBwEstimate1(...)
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*
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* This function updates the estimate of the bandwidth.
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*
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* Input:
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* - ISAC_main_inst : ISAC instance.
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* - encoded : encoded ISAC frame(s).
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* - packet_size : size of the packet in bytes.
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* - rtp_seq_number : the RTP number of the packet.
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* - arr_ts : the arrival time of the packet (from NetEq)
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* in samples.
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*
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* Return value : 0 - Ok
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* -1 - Error
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*/
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int16_t WebRtcIsacfix_UpdateBwEstimate1(ISACFIX_MainStruct* ISAC_main_inst,
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const uint8_t* encoded,
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size_t packet_size,
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uint16_t rtp_seq_number,
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uint32_t arr_ts);
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/****************************************************************************
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* WebRtcIsacfix_UpdateBwEstimate(...)
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*
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* This function updates the estimate of the bandwidth.
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*
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* Input:
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* - ISAC_main_inst : ISAC instance.
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* - encoded : encoded ISAC frame(s).
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* - packet_size : size of the packet in bytes.
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* - rtp_seq_number : the RTP number of the packet.
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* - send_ts : the send time of the packet from RTP header,
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* in samples.
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* - arr_ts : the arrival time of the packet (from NetEq)
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* in samples.
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*
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* Return value : 0 - Ok
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* -1 - Error
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*/
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int16_t WebRtcIsacfix_UpdateBwEstimate(ISACFIX_MainStruct* ISAC_main_inst,
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const uint8_t* encoded,
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size_t packet_size,
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uint16_t rtp_seq_number,
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uint32_t send_ts,
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uint32_t arr_ts);
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/****************************************************************************
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* WebRtcIsacfix_Decode(...)
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*
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* This function decodes an ISAC frame. Output speech length
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* will be a multiple of 480 samples: 480 or 960 samples,
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* depending on the framesize (30 or 60 ms).
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*
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* Input:
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* - ISAC_main_inst : ISAC instance.
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* - encoded : encoded ISAC frame(s)
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* - len : bytes in encoded vector
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*
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* Output:
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* - decoded : The decoded vector
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*
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* Return value : >0 - number of samples in decoded vector
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* -1 - Error
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*/
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int WebRtcIsacfix_Decode(ISACFIX_MainStruct* ISAC_main_inst,
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const uint8_t* encoded,
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size_t len,
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int16_t* decoded,
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int16_t* speechType);
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/****************************************************************************
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* WebRtcIsacfix_DecodePlc(...)
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*
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* This function conducts PLC for ISAC frame(s) in wide-band (16kHz sampling).
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* Output speech length will be "480*noOfLostFrames" samples
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* that is equevalent of "30*noOfLostFrames" millisecond.
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*
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* Input:
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* - ISAC_main_inst : ISAC instance.
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* - noOfLostFrames : Number of PLC frames (480sample = 30ms)
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* to produce
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* NOTE! Maximum number is 2 (960 samples = 60ms)
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*
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* Output:
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* - decoded : The decoded vector
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*
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* Return value : Number of samples in decoded PLC vector
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*/
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size_t WebRtcIsacfix_DecodePlc(ISACFIX_MainStruct* ISAC_main_inst,
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int16_t* decoded,
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size_t noOfLostFrames);
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/****************************************************************************
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* WebRtcIsacfix_ReadFrameLen(...)
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*
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* This function returns the length of the frame represented in the packet.
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*
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* Input:
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* - encoded : Encoded bitstream
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* - encoded_len_bytes : Length of the bitstream in bytes.
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*
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* Output:
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* - frameLength : Length of frame in packet (in samples)
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*
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*/
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int16_t WebRtcIsacfix_ReadFrameLen(const uint8_t* encoded,
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size_t encoded_len_bytes,
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size_t* frameLength);
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/****************************************************************************
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* WebRtcIsacfix_Control(...)
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*
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* This function sets the limit on the short-term average bit rate and the
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* frame length. Should be used only in Instantaneous mode.
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*
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* Input:
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* - ISAC_main_inst : ISAC instance.
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* - rate : limit on the short-term average bit rate,
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* in bits/second (between 10000 and 32000)
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* - framesize : number of milliseconds per frame (30 or 60)
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*
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* Return value : 0 - ok
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* -1 - Error
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*/
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int16_t WebRtcIsacfix_Control(ISACFIX_MainStruct* ISAC_main_inst,
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int16_t rate,
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int framesize);
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void WebRtcIsacfix_SetInitialBweBottleneck(ISACFIX_MainStruct* ISAC_main_inst,
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int bottleneck_bits_per_second);
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/****************************************************************************
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* WebRtcIsacfix_ControlBwe(...)
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*
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* This function sets the initial values of bottleneck and frame-size if
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* iSAC is used in channel-adaptive mode. Through this API, users can
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* enforce a frame-size for all values of bottleneck. Then iSAC will not
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* automatically change the frame-size.
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*
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*
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* Input:
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* - ISAC_main_inst : ISAC instance.
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* - rateBPS : initial value of bottleneck in bits/second
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* 10000 <= rateBPS <= 32000 is accepted
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* - frameSizeMs : number of milliseconds per frame (30 or 60)
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* - enforceFrameSize : 1 to enforce the given frame-size through out
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* the adaptation process, 0 to let iSAC change
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* the frame-size if required.
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*
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* Return value : 0 - ok
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* -1 - Error
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*/
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int16_t WebRtcIsacfix_ControlBwe(ISACFIX_MainStruct* ISAC_main_inst,
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int16_t rateBPS,
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int frameSizeMs,
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int16_t enforceFrameSize);
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/****************************************************************************
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* WebRtcIsacfix_version(...)
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*
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* This function returns the version number.
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*
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* Output:
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* - version : Pointer to character string
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*
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*/
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void WebRtcIsacfix_version(char* version);
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/****************************************************************************
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* WebRtcIsacfix_GetErrorCode(...)
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*
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* This function can be used to check the error code of an iSAC instance. When
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* a function returns -1 a error code will be set for that instance. The
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* function below extract the code of the last error that occured in the
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* specified instance.
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*
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* Input:
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* - ISAC_main_inst : ISAC instance
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*
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* Return value : Error code
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*/
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int16_t WebRtcIsacfix_GetErrorCode(ISACFIX_MainStruct* ISAC_main_inst);
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/****************************************************************************
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* WebRtcIsacfix_GetUplinkBw(...)
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*
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* This function return iSAC send bitrate
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*
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* Input:
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* - ISAC_main_inst : iSAC instance
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*
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* Return value : <0 Error code
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* else bitrate
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*/
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int32_t WebRtcIsacfix_GetUplinkBw(ISACFIX_MainStruct* ISAC_main_inst);
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/****************************************************************************
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* WebRtcIsacfix_SetMaxPayloadSize(...)
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*
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* This function sets a limit for the maximum payload size of iSAC. The same
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* value is used both for 30 and 60 msec packets.
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* The absolute max will be valid until next time the function is called.
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* NOTE! This function may override the function WebRtcIsacfix_SetMaxRate()
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*
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* Input:
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* - ISAC_main_inst : iSAC instance
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* - maxPayloadBytes : maximum size of the payload in bytes
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* valid values are between 100 and 400 bytes
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*
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*
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* Return value : 0 if sucessful
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* -1 if error happens
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*/
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int16_t WebRtcIsacfix_SetMaxPayloadSize(ISACFIX_MainStruct* ISAC_main_inst,
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int16_t maxPayloadBytes);
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/****************************************************************************
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* WebRtcIsacfix_SetMaxRate(...)
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*
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* This function sets the maximum rate which the codec may not exceed for a
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* singel packet. The maximum rate is set in bits per second.
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* The codec has an absolute maximum rate of 53400 bits per second (200 bytes
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* per 30 msec).
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* It is possible to set a maximum rate between 32000 and 53400 bits per second.
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*
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* The rate limit is valid until next time the function is called.
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*
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* NOTE! Packet size will never go above the value set if calling
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* WebRtcIsacfix_SetMaxPayloadSize() (default max packet size is 400 bytes).
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*
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* Input:
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* - ISAC_main_inst : iSAC instance
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* - maxRateInBytes : maximum rate in bits per second,
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* valid values are 32000 to 53400 bits
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*
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* Return value : 0 if sucessful
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* -1 if error happens
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*/
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int16_t WebRtcIsacfix_SetMaxRate(ISACFIX_MainStruct* ISAC_main_inst,
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int32_t maxRate);
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/****************************************************************************
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* WebRtcIsacfix_CreateInternal(...)
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*
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* This function creates the memory that is used to store data in the encoder
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*
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* Input:
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* - *ISAC_main_inst : a pointer to the coder instance.
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*
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* Return value : 0 - Ok
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* -1 - Error
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*/
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int16_t WebRtcIsacfix_CreateInternal(ISACFIX_MainStruct* ISAC_main_inst);
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/****************************************************************************
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* WebRtcIsacfix_FreeInternal(...)
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*
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* This function frees the internal memory for storing encoder data.
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*
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* Input:
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* - ISAC_main_inst : an ISAC instance.
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*
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* Return value : 0 - Ok
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* -1 - Error
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*/
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int16_t WebRtcIsacfix_FreeInternal(ISACFIX_MainStruct* ISAC_main_inst);
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/****************************************************************************
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* WebRtcIsacfix_GetNewBitStream(...)
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*
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* This function returns encoded data, with the received bwe-index in the
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* stream. It should always return a complete packet, i.e. only called once
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* even for 60 msec frames
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*
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* Input:
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* - ISAC_main_inst : ISAC instance.
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* - bweIndex : index of bandwidth estimate to put in new
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* bitstream - scale : factor for rate change (0.4 ~=> half the
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* rate, 1 no change).
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*
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* Output:
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* - encoded : the encoded data vector
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*
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* Return value : >0 - Length (in bytes) of coded data
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* -1 - Error
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*/
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int16_t WebRtcIsacfix_GetNewBitStream(ISACFIX_MainStruct* ISAC_main_inst,
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int16_t bweIndex,
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float scale,
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uint8_t* encoded);
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/****************************************************************************
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* WebRtcIsacfix_GetDownLinkBwIndex(...)
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*
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* This function returns index representing the Bandwidth estimate from
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* other side to this side.
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*
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* Input:
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* - ISAC_main_inst : iSAC struct
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*
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* Output:
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* - rateIndex : Bandwidth estimate to transmit to other side.
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*
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*/
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int16_t WebRtcIsacfix_GetDownLinkBwIndex(ISACFIX_MainStruct* ISAC_main_inst,
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int16_t* rateIndex);
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/****************************************************************************
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* WebRtcIsacfix_UpdateUplinkBw(...)
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*
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* This function takes an index representing the Bandwidth estimate from
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* this side to other side and updates BWE.
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*
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* Input:
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* - ISAC_main_inst : iSAC struct
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* - rateIndex : Bandwidth estimate from other side.
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*
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*/
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int16_t WebRtcIsacfix_UpdateUplinkBw(ISACFIX_MainStruct* ISAC_main_inst,
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int16_t rateIndex);
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/****************************************************************************
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* WebRtcIsacfix_ReadBwIndex(...)
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*
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* This function returns the index of the Bandwidth estimate from the bitstream.
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*
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* Input:
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* - encoded : Encoded bitstream
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* - encoded_len_bytes : Length of the bitstream in bytes.
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*
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* Output:
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* - rateIndex : Bandwidth estimate in bitstream
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*
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*/
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int16_t WebRtcIsacfix_ReadBwIndex(const uint8_t* encoded,
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size_t encoded_len_bytes,
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int16_t* rateIndex);
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/****************************************************************************
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* WebRtcIsacfix_GetNewFrameLen(...)
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*
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* This function return the next frame length (in samples) of iSAC.
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*
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* Input:
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* -ISAC_main_inst : iSAC instance
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*
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* Return value : frame lenght in samples
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*/
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int16_t WebRtcIsacfix_GetNewFrameLen(ISACFIX_MainStruct* ISAC_main_inst);
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#if defined(__cplusplus)
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}
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#endif
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#endif /* MODULES_AUDIO_CODING_CODECS_ISAC_FIX_INCLUDE_ISACFIX_H_ */
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