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/* ------------------------------------------------------------------
* Copyright (C) 2017 AVT GmbH - Fabien Vercasson
* Copyright (C) 2019 Matthias P. Braendli
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied.
* See the License for the specific language governing permissions
* and limitations under the License.
* -------------------------------------------------------------------
*/
/*! \section AVT Input
*
* This input comunicate with AVT encoder
*
* The encoded frames and reassambled
* The PAD Frames are sent to the encoder for insertion.
* The encoder is remotely controled to set bitrate and audio mode.
*
*/
#pragma once
#include "Socket.h"
#include "OrderedQueue.h"
#include <cstdint>
#include <cstdio>
#include <string>
#include <queue>
#include <vector>
#define DEF_BR 64
// The enum values folown the AVT messages definitions.
enum {
AVT_Mono = 0,
AVT_Mono_SBR,
AVT_Stereo,
AVT_Stereo_SBR,
AVT_Stereo_SBR_PS
};
enum {
AVT_MonoMode_LR2 = 0,
AVT_MonoMode_L,
AVT_MonoMode_R
};
enum {
AVT_DAC_32 = 0,
AVT_DAC_48
};
class AVTInput
{
public:
AVTInput(const std::string& input_uri, const std::string& output_uri, uint32_t pad_port,
size_t jitterBufferSize = 40);
/*! Open the file and prepare the wav decoder.
*
* \return nonzero on error
*/
int prepare(void);
/*! Inform class and remove encoder about the bitrate and audio mode
*
* \return nonzero on error
*/
int setDabPlusParameters(int bitrate, int channels, int sample_rate, bool sbr, bool ps);
/*! Read incomming frames from the encoder, reorder and reassemble then into DAB+ superframes
*! Give the next reassembled audio frame (120ms for DAB+)
*
* \return the size of the frame or 0 if none are available yet
*/
ssize_t getNextFrame(std::vector<uint8_t> &buf);
/*! Store a new PAD frame.
*! Frames are sent to the encoder on request
*/
void pushPADFrame(const uint8_t* buf, size_t size);
/* \return true if PAD Frame queue is full */
bool padQueueFull();
private:
std::string _input_uri;
std::string _output_uri;
uint32_t _pad_port;
size_t _jitterBufferSize;
Socket::UDPSocket _input_socket;
Socket::UDPSocket _output_socket;
Socket::UDPPacket _output_packet;
Socket::UDPSocket _input_pad_socket;
Socket::UDPPacket _pad_packet;
OrderedQueue _ordered;
std::queue<std::vector<uint8_t> > _padFrameQueue;
int32_t _subChannelIndex = DEF_BR/8;
int32_t _bitRate = DEF_BR * 1000;
int32_t _audioMode = AVT_Mono;
int32_t _monoMode = AVT_MonoMode_LR2;
int32_t _dac = AVT_DAC_48;
size_t _dab24msFrameSize = DEF_BR*3;
bool _frameAligned = false;
std::vector<uint8_t> _currentFrame;
int32_t _nbFrames = 0;
size_t _currentFrameSize = 0;
bool _parseURI(const char* uri, std::string& address, long& port);
int _openSocketSrv(Socket::UDPSocket* socket, const char* uri);
int _openSocketCli();
void _sendCtrlMessage();
void _sendPADFrame();
void _interpretMessage(const uint8_t *data, size_t size);
bool _checkMessage();
void _purgeMessages();
/*! Test Bytes 1,2,3 for STI detection */
bool _isSTI(const uint8_t* buf);
/*! Find and extract the DAB frame from UDP/RTP/STI received frame
* \param frameNumber will contain the frameNumber
* \param dataSize will contain the actual DAB frame size
* \return Pointer to first byte of the DAB frame, or NULL if not found
*/
const uint8_t* _findDABFrameFromUDP(const uint8_t* buf, size_t size,
int32_t& frameNumber, size_t& dataSize);
/*! Read and store one frame from encoder
*
* \return true if a data has been received
*/
bool _readFrame();
/*! Output info about received frames*/
enum _frameType {
_typeSTI,
_typeSTIRTP,
_typeCantExtract
};
_frameType _lastInfoFrameType;
size_t _lastInfoSize = 0;
size_t _infoNbFrame = 0;
void _info(_frameType type, size_t size);
};
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