mirror of
https://github.com/dj0abr/SSB_HighSpeed_Modem.git
synced 2024-11-15 00:21:51 -05:00
128 lines
3.2 KiB
C++
Executable File
128 lines
3.2 KiB
C++
Executable File
/*
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* High Speed modem to transfer data in a 2,7kHz SSB channel
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* =========================================================
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* Author: DJ0ABR
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*
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* (c) DJ0ABR
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* www.dj0abr.de
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* announcement.c ... sends the *.pcm files to the playback device
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*
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*
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*/
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#include "hsmodem.h"
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typedef struct _AUDIOFILES_ {
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char fn[256];
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int duration;
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} AUDIOFILES;
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AUDIOFILES audiofiles[12] =
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{
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{"amsat", 1100},
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{"qpsk", 1100},
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{"psk8", 1100},
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{"3000", 600},
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{"4000", 600},
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{"4410", 900},
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{"4800", 900},
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{"5500", 900},
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{"6000", 600},
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{"6600", 900},
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{"7200", 900},
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{"kbps", 1000},
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};
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char* getAudiofn(int aidx, char* ext)
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{
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static char filename[300];
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strcpy(filename, "audio/");
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strcat(filename, audiofiles[aidx].fn);
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strcat(filename, ext);
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return filename;
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}
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void playAudioFLAC(int aidx)
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{
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int resamp = 0;
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int len;
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int16_t d[100];
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printf("play:%s, caprate:%d\n", getAudiofn(aidx, ".pcm"),caprate);
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FILE* fp = fopen(getAudiofn(aidx, ".pcm"), "rb");
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if (fp)
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{
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while ((len = fread(d, sizeof(int16_t), 100, fp)))
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{
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for (int i = 0; i < len; i++)
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{
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float f = (float)d[i];
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f /= 32768;
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io_pb_write_fifo(f);
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if (caprate == 48000)
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{
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if (++resamp >= 9)
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{
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resamp = 0;
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io_pb_write_fifo(f);
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}
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}
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// sync with soundcard
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while (io_pb_fifo_usedspace() > 10000) sleep_ms(1);
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}
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if (len != 100) break;
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}
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fclose(fp);
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}
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else
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printf("audio file not found\n");
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}
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int ann_running = 0;
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int transmissions = 10000;
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void sendAnnouncement()
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{
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if (announcement == 0) return;
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if (++transmissions >= announcement)
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{
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ann_running = 1;
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transmissions = 0;
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playAudioFLAC(0);
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if (bitsPerSymbol == 2) playAudioFLAC(1);
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else playAudioFLAC(2);
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switch (linespeed)
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{
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case 3000: playAudioFLAC(3); break;
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case 4000: playAudioFLAC(4); break;
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case 4410: playAudioFLAC(5); break;
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case 4800: playAudioFLAC(6); break;
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case 5500: playAudioFLAC(7); break;
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case 6000: playAudioFLAC(8); break;
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case 6600: playAudioFLAC(9); break;
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case 7200: playAudioFLAC(10); break;
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}
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playAudioFLAC(11);
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ann_running = 0;
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}
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}
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