| /* |
| * 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 MODULES_AUDIO_CODING_CODECS_ISAC_FIX_INCLUDE_ISACFIX_H_ |
| #define MODULES_AUDIO_CODING_CODECS_ISAC_FIX_INCLUDE_ISACFIX_H_ |
| |
| #include <stddef.h> |
| |
| #include "modules/audio_coding/codecs/isac/bandwidth_info.h" |
| |
| typedef struct { |
| void* dummy; |
| } ISACFIX_MainStruct; |
| |
| #if defined(__cplusplus) |
| extern "C" { |
| #endif |
| |
| /**************************************************************************** |
| * 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 |
| */ |
| |
| int16_t 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 |
| */ |
| |
| int16_t 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 |
| */ |
| |
| int16_t WebRtcIsacfix_EncoderInit(ISACFIX_MainStruct* ISAC_main_inst, |
| int16_t 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 |
| */ |
| |
| int WebRtcIsacfix_Encode(ISACFIX_MainStruct* ISAC_main_inst, |
| const int16_t* speechIn, |
| uint8_t* encoded); |
| |
| /**************************************************************************** |
| * WebRtcIsacfix_DecoderInit(...) |
| * |
| * This function initializes an ISAC instance prior to the decoder calls. |
| * |
| * Input: |
| * - ISAC_main_inst : ISAC instance. |
| */ |
| |
| void 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 in bytes. |
| * - 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 |
| */ |
| |
| int16_t WebRtcIsacfix_UpdateBwEstimate1(ISACFIX_MainStruct* ISAC_main_inst, |
| const uint8_t* encoded, |
| size_t packet_size, |
| uint16_t rtp_seq_number, |
| uint32_t 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 in bytes. |
| * - 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 |
| */ |
| |
| int16_t WebRtcIsacfix_UpdateBwEstimate(ISACFIX_MainStruct* ISAC_main_inst, |
| const uint8_t* encoded, |
| size_t packet_size, |
| uint16_t rtp_seq_number, |
| uint32_t send_ts, |
| uint32_t 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 |
| */ |
| |
| int WebRtcIsacfix_Decode(ISACFIX_MainStruct* ISAC_main_inst, |
| const uint8_t* encoded, |
| size_t len, |
| int16_t* decoded, |
| int16_t* speechType); |
| |
| /**************************************************************************** |
| * 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 : Number of samples in decoded PLC vector |
| */ |
| |
| size_t WebRtcIsacfix_DecodePlc(ISACFIX_MainStruct* ISAC_main_inst, |
| int16_t* decoded, |
| size_t noOfLostFrames); |
| |
| /**************************************************************************** |
| * WebRtcIsacfix_ReadFrameLen(...) |
| * |
| * This function returns the length of the frame represented in the packet. |
| * |
| * Input: |
| * - encoded : Encoded bitstream |
| * - encoded_len_bytes : Length of the bitstream in bytes. |
| * |
| * Output: |
| * - frameLength : Length of frame in packet (in samples) |
| * |
| */ |
| |
| int16_t WebRtcIsacfix_ReadFrameLen(const uint8_t* encoded, |
| size_t encoded_len_bytes, |
| size_t* 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 |
| */ |
| |
| int16_t WebRtcIsacfix_Control(ISACFIX_MainStruct* ISAC_main_inst, |
| int16_t rate, |
| int framesize); |
| |
| void WebRtcIsacfix_SetInitialBweBottleneck(ISACFIX_MainStruct* ISAC_main_inst, |
| int bottleneck_bits_per_second); |
| |
| /**************************************************************************** |
| * 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 |
| */ |
| |
| int16_t WebRtcIsacfix_ControlBwe(ISACFIX_MainStruct* ISAC_main_inst, |
| int16_t rateBPS, |
| int frameSizeMs, |
| int16_t 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 |
| */ |
| |
| int16_t 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 |
| */ |
| |
| int32_t 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 |
| */ |
| |
| int16_t WebRtcIsacfix_SetMaxPayloadSize(ISACFIX_MainStruct* ISAC_main_inst, |
| int16_t 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 |
| */ |
| |
| int16_t WebRtcIsacfix_SetMaxRate(ISACFIX_MainStruct* ISAC_main_inst, |
| int32_t 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 |
| */ |
| |
| int16_t 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 |
| */ |
| |
| int16_t 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 |
| */ |
| |
| int16_t WebRtcIsacfix_GetNewBitStream(ISACFIX_MainStruct* ISAC_main_inst, |
| int16_t bweIndex, |
| float scale, |
| uint8_t* 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. |
| * |
| */ |
| |
| int16_t WebRtcIsacfix_GetDownLinkBwIndex(ISACFIX_MainStruct* ISAC_main_inst, |
| int16_t* 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. |
| * |
| */ |
| |
| int16_t WebRtcIsacfix_UpdateUplinkBw(ISACFIX_MainStruct* ISAC_main_inst, |
| int16_t rateIndex); |
| |
| /**************************************************************************** |
| * WebRtcIsacfix_ReadBwIndex(...) |
| * |
| * This function returns the index of the Bandwidth estimate from the bitstream. |
| * |
| * Input: |
| * - encoded : Encoded bitstream |
| * - encoded_len_bytes : Length of the bitstream in bytes. |
| * |
| * Output: |
| * - rateIndex : Bandwidth estimate in bitstream |
| * |
| */ |
| |
| int16_t WebRtcIsacfix_ReadBwIndex(const uint8_t* encoded, |
| size_t encoded_len_bytes, |
| int16_t* 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 |
| */ |
| |
| int16_t WebRtcIsacfix_GetNewFrameLen(ISACFIX_MainStruct* ISAC_main_inst); |
| |
| #if defined(__cplusplus) |
| } |
| #endif |
| |
| #endif /* MODULES_AUDIO_CODING_CODECS_ISAC_FIX_INCLUDE_ISACFIX_H_ */ |
