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2011-05-30 11:22:19 +00:00
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modules/audio_coding/codecs/iSAC/fix/interface/isacfix.h Normal file
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/*
* 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.
*/
#ifndef WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_FIX_INTERFACE_ISACFIX_H_
#define WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_FIX_INTERFACE_ISACFIX_H_
/*
* Define the fixpoint numeric formats
*/
#include "typedefs.h"
typedef struct {
void *dummy;
} ISACFIX_MainStruct;
#if defined(__cplusplus)
extern "C" {
#endif
/**************************************************************************
* WebRtcIsacfix_AssignSize(...)
*
* Functions used when malloc is not allowed
* Output the number of bytes needed to allocate for iSAC struct.
*
*/
WebRtc_Word16 WebRtcIsacfix_AssignSize(int *sizeinbytes);
/**************************************************************************
* WebRtcIsacfix_Assign(...)
*
* Functions used when malloc is not allowed, it
* places a struct at the given address.
*
* Input:
* - *ISAC_main_inst : a pointer to the coder instance.
* - ISACFIX_inst_Addr : address of the memory where a space is
* for iSAC structure.
*
* Return value : 0 - Ok
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_Assign(ISACFIX_MainStruct **inst,
void *ISACFIX_inst_Addr);
/****************************************************************************
* WebRtcIsacfix_Create(...)
*
* This function creates an ISAC instance, which will contain the state
* information for one coding/decoding channel.
*
* Input:
* - *ISAC_main_inst : a pointer to the coder instance.
*
* Return value : 0 - Ok
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_Create(ISACFIX_MainStruct **ISAC_main_inst);
/****************************************************************************
* WebRtcIsacfix_Free(...)
*
* This function frees the ISAC instance created at the beginning.
*
* Input:
* - ISAC_main_inst : a ISAC instance.
*
* Return value : 0 - Ok
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_Free(ISACFIX_MainStruct *ISAC_main_inst);
/****************************************************************************
* WebRtcIsacfix_EncoderInit(...)
*
* This function initializes an ISAC instance prior to the encoder calls.
*
* Input:
* - ISAC_main_inst : ISAC instance.
* - CodingMode : 0 - Bit rate and frame length are automatically
* adjusted to available bandwidth on
* transmission channel.
* 1 - User sets a frame length and a target bit
* rate which is taken as the maximum short-term
* average bit rate.
*
* Return value : 0 - Ok
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_EncoderInit(ISACFIX_MainStruct *ISAC_main_inst,
WebRtc_Word16 CodingMode);
/****************************************************************************
* WebRtcIsacfix_Encode(...)
*
* This function encodes 10ms frame(s) and inserts it into a package.
* Input speech length has to be 160 samples (10ms). The encoder buffers those
* 10ms frames until it reaches the chosen Framesize (480 or 960 samples
* corresponding to 30 or 60 ms frames), and then proceeds to the encoding.
*
* Input:
* - ISAC_main_inst : ISAC instance.
* - speechIn : input speech vector.
*
* Output:
* - encoded : the encoded data vector
*
* Return value : >0 - Length (in bytes) of coded data
* 0 - The buffer didn't reach the chosen framesize
* so it keeps buffering speech samples.
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_Encode(ISACFIX_MainStruct *ISAC_main_inst,
const WebRtc_Word16 *speechIn,
WebRtc_Word16 *encoded);
/****************************************************************************
* WebRtcIsacfix_EncodeNb(...)
*
* This function encodes 10ms narrow band (8 kHz sampling) frame(s) and inserts
* it into a package. Input speech length has to be 80 samples (10ms). The encoder
* interpolates into wide-band (16 kHz sampling) buffers those
* 10ms frames until it reaches the chosen Framesize (480 or 960 wide-band samples
* corresponding to 30 or 60 ms frames), and then proceeds to the encoding.
*
* Input:
* - ISAC_main_inst : ISAC instance.
* - speechIn : input speech vector.
*
* Output:
* - encoded : the encoded data vector
*
* Return value : >0 - Length (in bytes) of coded data
* 0 - The buffer didn't reach the chosen framesize
* so it keeps buffering speech samples.
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_EncodeNb(ISACFIX_MainStruct *ISAC_main_inst,
const WebRtc_Word16 *speechIn,
WebRtc_Word16 *encoded);
/****************************************************************************
* WebRtcIsacfix_DecoderInit(...)
*
* This function initializes an ISAC instance prior to the decoder calls.
*
* Input:
* - ISAC_main_inst : ISAC instance.
*
* Return value
* : 0 - Ok
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_DecoderInit(ISACFIX_MainStruct *ISAC_main_inst);
/****************************************************************************
* WebRtcIsacfix_UpdateBwEstimate1(...)
*
* This function updates the estimate of the bandwidth.
*
* Input:
* - ISAC_main_inst : ISAC instance.
* - encoded : encoded ISAC frame(s).
* - packet_size : size of the packet.
* - rtp_seq_number : the RTP number of the packet.
* - arr_ts : the arrival time of the packet (from NetEq)
* in samples.
*
* Return value : 0 - Ok
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_UpdateBwEstimate1(ISACFIX_MainStruct *ISAC_main_inst,
const WebRtc_UWord16 *encoded,
WebRtc_Word32 packet_size,
WebRtc_UWord16 rtp_seq_number,
WebRtc_UWord32 arr_ts);
/****************************************************************************
* WebRtcIsacfix_UpdateBwEstimate(...)
*
* This function updates the estimate of the bandwidth.
*
* Input:
* - ISAC_main_inst : ISAC instance.
* - encoded : encoded ISAC frame(s).
* - packet_size : size of the packet.
* - rtp_seq_number : the RTP number of the packet.
* - send_ts : the send time of the packet from RTP header,
* in samples.
* - arr_ts : the arrival time of the packet (from NetEq)
* in samples.
*
* Return value : 0 - Ok
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_UpdateBwEstimate(ISACFIX_MainStruct *ISAC_main_inst,
const WebRtc_UWord16 *encoded,
WebRtc_Word32 packet_size,
WebRtc_UWord16 rtp_seq_number,
WebRtc_UWord32 send_ts,
WebRtc_UWord32 arr_ts);
/****************************************************************************
* WebRtcIsacfix_Decode(...)
*
* This function decodes an ISAC frame. Output speech length
* will be a multiple of 480 samples: 480 or 960 samples,
* depending on the framesize (30 or 60 ms).
*
* Input:
* - ISAC_main_inst : ISAC instance.
* - encoded : encoded ISAC frame(s)
* - len : bytes in encoded vector
*
* Output:
* - decoded : The decoded vector
*
* Return value : >0 - number of samples in decoded vector
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_Decode(ISACFIX_MainStruct *ISAC_main_inst,
const WebRtc_UWord16 *encoded,
WebRtc_Word16 len,
WebRtc_Word16 *decoded,
WebRtc_Word16 *speechType);
/****************************************************************************
* WebRtcIsacfix_DecodeNb(...)
*
* This function decodes a ISAC frame in narrow-band (8 kHz sampling).
* Output speech length will be a multiple of 240 samples: 240 or 480 samples,
* depending on the framesize (30 or 60 ms).
*
* Input:
* - ISAC_main_inst : ISAC instance.
* - encoded : encoded ISAC frame(s)
* - len : bytes in encoded vector
*
* Output:
* - decoded : The decoded vector
*
* Return value : >0 - number of samples in decoded vector
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_DecodeNb(ISACFIX_MainStruct *ISAC_main_inst,
const WebRtc_UWord16 *encoded,
WebRtc_Word16 len,
WebRtc_Word16 *decoded,
WebRtc_Word16 *speechType);
/****************************************************************************
* WebRtcIsacfix_DecodePlcNb(...)
*
* This function conducts PLC for ISAC frame(s) in narrow-band (8kHz sampling).
* Output speech length will be "240*noOfLostFrames" samples
* that equevalent of "30*noOfLostFrames" millisecond.
*
* Input:
* - ISAC_main_inst : ISAC instance.
* - noOfLostFrames : Number of PLC frames (240 sample=30ms) to produce
* NOTE! Maximum number is 2 (480 samples = 60ms)
*
* Output:
* - decoded : The decoded vector
*
* Return value : >0 - number of samples in decoded PLC vector
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_DecodePlcNb(ISACFIX_MainStruct *ISAC_main_inst,
WebRtc_Word16 *decoded,
WebRtc_Word16 noOfLostFrames );
/****************************************************************************
* WebRtcIsacfix_DecodePlc(...)
*
* This function conducts PLC for ISAC frame(s) in wide-band (16kHz sampling).
* Output speech length will be "480*noOfLostFrames" samples
* that is equevalent of "30*noOfLostFrames" millisecond.
*
* Input:
* - ISAC_main_inst : ISAC instance.
* - noOfLostFrames : Number of PLC frames (480sample = 30ms)
* to produce
* NOTE! Maximum number is 2 (960 samples = 60ms)
*
* Output:
* - decoded : The decoded vector
*
* Return value : >0 - number of samples in decoded PLC vector
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_DecodePlc(ISACFIX_MainStruct *ISAC_main_inst,
WebRtc_Word16 *decoded,
WebRtc_Word16 noOfLostFrames );
/****************************************************************************
* WebRtcIsacfix_ReadFrameLen(...)
*
* This function returns the length of the frame represented in the packet.
*
* Input:
* - encoded : Encoded bitstream
*
* Output:
* - frameLength : Length of frame in packet (in samples)
*
*/
WebRtc_Word16 WebRtcIsacfix_ReadFrameLen(const WebRtc_Word16* encoded,
WebRtc_Word16* frameLength);
/****************************************************************************
* WebRtcIsacfix_Control(...)
*
* This function sets the limit on the short-term average bit rate and the
* frame length. Should be used only in Instantaneous mode.
*
* Input:
* - ISAC_main_inst : ISAC instance.
* - rate : limit on the short-term average bit rate,
* in bits/second (between 10000 and 32000)
* - framesize : number of milliseconds per frame (30 or 60)
*
* Return value : 0 - ok
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_Control(ISACFIX_MainStruct *ISAC_main_inst,
WebRtc_Word16 rate,
WebRtc_Word16 framesize);
/****************************************************************************
* WebRtcIsacfix_ControlBwe(...)
*
* This function sets the initial values of bottleneck and frame-size if
* iSAC is used in channel-adaptive mode. Through this API, users can
* enforce a frame-size for all values of bottleneck. Then iSAC will not
* automatically change the frame-size.
*
*
* Input:
* - ISAC_main_inst : ISAC instance.
* - rateBPS : initial value of bottleneck in bits/second
* 10000 <= rateBPS <= 32000 is accepted
* - frameSizeMs : number of milliseconds per frame (30 or 60)
* - enforceFrameSize : 1 to enforce the given frame-size through out
* the adaptation process, 0 to let iSAC change
* the frame-size if required.
*
* Return value : 0 - ok
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_ControlBwe(ISACFIX_MainStruct *ISAC_main_inst,
WebRtc_Word16 rateBPS,
WebRtc_Word16 frameSizeMs,
WebRtc_Word16 enforceFrameSize);
/****************************************************************************
* WebRtcIsacfix_version(...)
*
* This function returns the version number.
*
* Output:
* - version : Pointer to character string
*
*/
void WebRtcIsacfix_version(char *version);
/****************************************************************************
* WebRtcIsacfix_GetErrorCode(...)
*
* This function can be used to check the error code of an iSAC instance. When
* a function returns -1 a error code will be set for that instance. The
* function below extract the code of the last error that occured in the
* specified instance.
*
* Input:
* - ISAC_main_inst : ISAC instance
*
* Return value : Error code
*/
WebRtc_Word16 WebRtcIsacfix_GetErrorCode(ISACFIX_MainStruct *ISAC_main_inst);
/****************************************************************************
* WebRtcIsacfix_GetUplinkBw(...)
*
* This function return iSAC send bitrate
*
* Input:
* - ISAC_main_inst : iSAC instance
*
* Return value : <0 Error code
* else bitrate
*/
WebRtc_Word32 WebRtcIsacfix_GetUplinkBw(ISACFIX_MainStruct *ISAC_main_inst);
/****************************************************************************
* WebRtcIsacfix_SetMaxPayloadSize(...)
*
* This function sets a limit for the maximum payload size of iSAC. The same
* value is used both for 30 and 60 msec packets.
* The absolute max will be valid until next time the function is called.
* NOTE! This function may override the function WebRtcIsacfix_SetMaxRate()
*
* Input:
* - ISAC_main_inst : iSAC instance
* - maxPayloadBytes : maximum size of the payload in bytes
* valid values are between 100 and 400 bytes
*
*
* Return value : 0 if sucessful
* -1 if error happens
*/
WebRtc_Word16 WebRtcIsacfix_SetMaxPayloadSize(ISACFIX_MainStruct *ISAC_main_inst,
WebRtc_Word16 maxPayloadBytes);
/****************************************************************************
* WebRtcIsacfix_SetMaxRate(...)
*
* This function sets the maximum rate which the codec may not exceed for a
* singel packet. The maximum rate is set in bits per second.
* The codec has an absolute maximum rate of 53400 bits per second (200 bytes
* per 30 msec).
* It is possible to set a maximum rate between 32000 and 53400 bits per second.
*
* The rate limit is valid until next time the function is called.
*
* NOTE! Packet size will never go above the value set if calling
* WebRtcIsacfix_SetMaxPayloadSize() (default max packet size is 400 bytes).
*
* Input:
* - ISAC_main_inst : iSAC instance
* - maxRateInBytes : maximum rate in bits per second,
* valid values are 32000 to 53400 bits
*
* Return value : 0 if sucessful
* -1 if error happens
*/
WebRtc_Word16 WebRtcIsacfix_SetMaxRate(ISACFIX_MainStruct *ISAC_main_inst,
WebRtc_Word32 maxRate);
/****************************************************************************
* WebRtcIsacfix_CreateInternal(...)
*
* This function creates the memory that is used to store data in the encoder
*
* Input:
* - *ISAC_main_inst : a pointer to the coder instance.
*
* Return value : 0 - Ok
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_CreateInternal(ISACFIX_MainStruct *ISAC_main_inst);
/****************************************************************************
* WebRtcIsacfix_FreeInternal(...)
*
* This function frees the internal memory for storing encoder data.
*
* Input:
* - ISAC_main_inst : an ISAC instance.
*
* Return value : 0 - Ok
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_FreeInternal(ISACFIX_MainStruct *ISAC_main_inst);
/****************************************************************************
* WebRtcIsacfix_GetNewBitStream(...)
*
* This function returns encoded data, with the recieved bwe-index in the
* stream. It should always return a complete packet, i.e. only called once
* even for 60 msec frames
*
* Input:
* - ISAC_main_inst : ISAC instance.
* - bweIndex : index of bandwidth estimate to put in new bitstream
* - scale : factor for rate change (0.4 ~=> half the rate, 1 no change).
*
* Output:
* - encoded : the encoded data vector
*
* Return value : >0 - Length (in bytes) of coded data
* -1 - Error
*/
WebRtc_Word16 WebRtcIsacfix_GetNewBitStream(ISACFIX_MainStruct *ISAC_main_inst,
WebRtc_Word16 bweIndex,
float scale,
WebRtc_Word16 *encoded);
/****************************************************************************
* WebRtcIsacfix_GetDownLinkBwIndex(...)
*
* This function returns index representing the Bandwidth estimate from
* other side to this side.
*
* Input:
* - ISAC_main_inst : iSAC struct
*
* Output:
* - rateIndex : Bandwidth estimate to transmit to other side.
*
*/
WebRtc_Word16 WebRtcIsacfix_GetDownLinkBwIndex(ISACFIX_MainStruct* ISAC_main_inst,
WebRtc_Word16* rateIndex);
/****************************************************************************
* WebRtcIsacfix_UpdateUplinkBw(...)
*
* This function takes an index representing the Bandwidth estimate from
* this side to other side and updates BWE.
*
* Input:
* - ISAC_main_inst : iSAC struct
* - rateIndex : Bandwidth estimate from other side.
*
*/
WebRtc_Word16 WebRtcIsacfix_UpdateUplinkBw(ISACFIX_MainStruct* ISAC_main_inst,
WebRtc_Word16 rateIndex);
/****************************************************************************
* WebRtcIsacfix_ReadBwIndex(...)
*
* This function returns the index of the Bandwidth estimate from the bitstream.
*
* Input:
* - encoded : Encoded bitstream
*
* Output:
* - rateIndex : Bandwidth estimate in bitstream
*
*/
WebRtc_Word16 WebRtcIsacfix_ReadBwIndex(const WebRtc_Word16* encoded,
WebRtc_Word16* rateIndex);
/****************************************************************************
* WebRtcIsacfix_GetNewFrameLen(...)
*
* This function return the next frame length (in samples) of iSAC.
*
* Input:
* -ISAC_main_inst : iSAC instance
*
* Return value : frame lenght in samples
*/
WebRtc_Word16 WebRtcIsacfix_GetNewFrameLen(ISACFIX_MainStruct *ISAC_main_inst);
#if defined(__cplusplus)
}
#endif
#endif /* WEBRTC_MODULES_AUDIO_CODING_CODECS_ISAC_FIX_INTERFACE_ISACFIX_H_ */