135 lines
4.3 KiB
C
135 lines
4.3 KiB
C
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#ifndef __freedv_mchf__
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#define __freedv_mchf__
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/* -*- mode: c; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4; coding: utf-8 -*- */
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/************************************************************************************
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** **
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** mcHF QRP Transceiver **
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** K Atanassov - M0NKA 2014 **
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** **
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**---------------------------------------------------------------------------------**
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** **
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** File name: **
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** Description: **
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** Last Modified: **
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** Licence: GNU GPLv3 **
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************************************************************************************/
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#include "uhsdr_types.h"
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#include "uhsdr_board.h"
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#include "uhsdr_board_config.h"
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#include "comp.h"
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#if defined(USE_FREEDV_700D)
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#define FDV_MAX_IQ_FRAME_LEN_MS 160
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#define FREEDV_MODE_UHSDR FREEDV_MODE_700D
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#elif defined(USE_FREEDV_1600)
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#define FDV_MAX_IQ_FRAME_LEN_MS 40
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#define FREEDV_MODE_UHSDR FREEDV_MODE_1600
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#endif
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// one need to set this to the highest frame length to be intended to use
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// FreeDV 700D requires 1280 samples for the 160ms frame, the audio size may be larger depending
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// on the algorithm
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// TODO: Explicitly list the variables in FreeDV to look at.
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#include "rb.h"
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typedef struct
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{
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int16_t real;
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int16_t imag;
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} COMP_int16_t;
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RingBuffer_Declare(fdv_iq_rb, COMP_int16_t)
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RingBuffer_Declare(fdv_audio_rb, int16_t)
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RingBuffer_Declare(fdv_demod_rb, int16_t)
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#define FDV_BUFFER_SIZE (FDV_MAX_IQ_FRAME_LEN_MS*8) // (160ms*8samples per ms)
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#define NR_BUFFER_NUM 4
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#define NR_BUFFER_SIZE 256 // 4*256*8 -> 8192
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typedef struct {
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COMP samples[NR_BUFFER_SIZE];
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} NR_Buffer;
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typedef union
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{
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fdv_demod_rb_item_t fdv_demod_buff[(FDV_BUFFER_SIZE * 3) + IQ_BLOCK_SIZE];
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fdv_iq_rb_item_t fdv_iq_buff[(FDV_BUFFER_SIZE * 2) + IQ_BLOCK_SIZE];
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NR_Buffer nr_audio_buff[NR_BUFFER_NUM];
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} MultiModeBuffer_t;
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#ifdef USE_FREEDV
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#ifdef DEBUG_FREEDV
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#define FREEDV_TEST_BUFFER_FRAME_COUNT 50
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#define FREEDV_TEST_BUFFER_FRAME_SIZE 320
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extern const COMP test_buffer[FREEDV_TEST_BUFFER_FRAME_SIZE*FREEDV_TEST_BUFFER_FRAME_COUNT];
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#endif
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#define FREEDV_TX_MESSAGE " CQ CQ CQ UHSDR " TRX_NAME " SDR with integrated FreeDV codec calling!"
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#define FREEDV_TX_DF8OE_MESSAGE " DF8OE JO42jr using UHSDR " TRX_NAME " SDR with integrated FreeDV codec"
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typedef struct {
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char* name;
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char* label;
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uint8_t freedv_id;
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} freedv_mode_desc_t;
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extern freedv_mode_desc_t freedv_modes[];
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extern const uint8_t freedv_modes_num;
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typedef struct {
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#define FDV_SQUELCH_OFF 0
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#define FDV_SQUELCH_OFFSET (-100)
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#define FDV_SQUELCH_MIN (-99-FDV_SQUELCH_OFFSET) // equals -99 SNR
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#define FDV_SQUELCH_MAX (99-FDV_SQUELCH_OFFSET) // equals 99 SNR
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#define FDV_SQUELCH_DEFAULT (-2-FDV_SQUELCH_OFFSET) // equals -2 SNR
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uint8_t squelch_snr_thresh;
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uint8_t mode;
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bool mute_if_squelched;
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} freedv_conf_t;
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extern freedv_conf_t freedv_conf;
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void FreeDv_HandleFreeDv(void);
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void FreeDV_Init(void);
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int32_t FreeDV_SetMode(uint8_t fdv_mode, int32_t firstTime);
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void FreeDV_Test(void);
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int32_t FreeDV_Iq_Get_FrameLen(void);
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int32_t FreeDV_Audio_Get_FrameLen(void);
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void FreeDv_DisplayClear(void);
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void FreeDv_DisplayPrepare(void);
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void FreeDv_DisplayUpdate(void);
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int32_t FreeDV_Get_Squelch_SNR(freedv_conf_t* freedv_conf_p);
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void FreeDV_Set_Squelch_SNR(freedv_conf_t* freedv_conf_p, int8_t squelch_snr);
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int FreeDV_Is_Squelch_Enable(freedv_conf_t* freedv_conf_p);
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void FreeDV_Squelch_Update(freedv_conf_t* freedv_conf_p);
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#endif
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#if defined(USE_FREEDV) || defined(USE_ALTERNATE_NR)
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extern MultiModeBuffer_t mmb;
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// we allow for one more pointer to a buffer as we have buffers
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// why? because our implementation will only fill up the fifo only to N-1 elements
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#define FDV_BUFFER_IQ_FIFO_SIZE (FDV_BUFFER_IQ_NUM+1)
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#define NR_BUFFER_FIFO_SIZE (NR_BUFFER_NUM+1)
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#endif
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#endif
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